rotary electric machine and vehicle equipped with rotary electric machine

专利摘要:
ELECTRIC ROTATING MACHINE AND VEHICLE EQUIPPED WITH ELECTRIC ROTATING MACHINE. The present invention relates to the rotating electrical machine which includes: a center of the stator having a plurality of grooves formed therein; a stator winding that assumes a plurality of phases, which includes a plurality of round windings wound with a wave winding pattern, each having groove conductors inserted into one of the grooves in the center of the stator to form one of a plurality of layers and transverse conductors each connecting the ends of the same side of the groove conductors inserted in the different grooves to form an end of the coil; and a rotor rotatingly supported with an inter-iron to be allowed to rotate with respect to the center of the stator, where: the transverse conductors connect the conductors of the groove to travel over the grooves with the groove level Np defined at N + 1 at the ends of the coil on one side and run over the grooves with the groove level set to N -1 at the ends of the coil on the other side, with N representing a number of grooves per pole; the stator winding includes a plurality of groups of the groove conductor each (...).
公开号:BR112013001411B1
申请号:R112013001411-3
申请日:2011-07-20
公开日:2020-11-10
发明作者:Yasuyuki Saito；Noriaki Hino；Kenichi Nakayama；Yoshimi Mori；Keiji Oda；Tomoaki KAIMORI
申请人:Hitachi Automotive Systems, Ltd.；
IPC主号:

专利说明:

Technical field
The present invention relates to an electric rotating machine and a vehicle equipped with the electric rotating machine. Prior art
The winding technologies adopted in conjunction with the rotating electric machine used to drive vehicles include those disclosed in patent literature 1. Citation List Patent literature
Patent Literature 1: US Patent No. 6894417 Summary of the invention 15 Technical problem
A rotating electrical machine mounted on an electric vehicle or the like is required to operate without generating any significant noise. Certainly, an objective of the present invention is to achieve noise reduction in a rotating electrical machine. 20 Solution to the problem
According to the first aspect of the present invention, a rotating electrical machine comprises: a center of the stator having a plurality of grooves formed therein; a stator winding that assumes a plurality of phases, which includes a plurality of rounded windings with a wave winding pattern, each having groove conductors inserted into one of the grooves in the center of the stator to form one of one plurality of layers and transverse conductors each connecting the ends of the same side of groove conductors inserted in different grooves to form an end of the coil; and a rotor rotatingly supported with an air gap to be able to rotate with respect to the stator center, in which: the transverse conductors connect the groove conductors to travel over the grooves with the groove level Np defined at N + 1 at the ends of the coil one side and run over the grooves with the groove level Np set to N - 1 at the ends of the coil on the other side, with N representing a number of grooves per pole; the stator winding includes a plurality of groups of the groove conductor each having a plurality of groove conductors corresponding to a single phase; the plurality of groove conductors in each groove conductor group is inserted into a predetermined number Ns of successive grooves that form a continuous strip along a circumference of the center of the stator so that the groove conductors in the groove group conductor of the groove have successive positions of the groove and successive positions of the layer; and the number pre-sets. finished Ns is defined so that Ns = NSPP + Nl_ when NSPP represents a number of grooves per phase per pole and a number of layers is expressed as 2 x NL. According to the second of the present invention, in the rotating electric machine according to the first aspect, it is preferred that: the groove conductor groups include subgroups of the groove conductor NL formed by the arrangement of the groove conductors in one (2m - 1) the layer and conductors of the groove in a second layer with an offset 20 relative to each other along the circumference of the center of the stator by a level of the groove 1; the conductor subgroups of the NL groove are arranged with a groove level 1 offset relative to each other along the circumference of the stator center; and m = 1, 2, NL.
According to the third aspect of the present invention, a rotating electrical machine comprises: a center of the stator having a plurality of grooves formed therein; a stator winding that assumes a plurality of phases, which includes a plurality of round windings wound with a wave winding pattern, each having groove conductors inserted into one of the grooves in the center of stator 30 to form one of a plurality of transverse layers and conductors each connecting the ends on the same side of the groove conductors inserted in different grooves to form an end of the coil; and a rotor rotatingly supported with an air gap to be able to rotate with respect to the stator center, in which: the transverse conductors connect the groove conductors to travel over the grooves with the groove level Np defined at N + 1 at the ends of the coil in a 5 side and run over the grooves with the groove level Np set to N - 1 at the ends of the coil on the other side, with N representing a number of grooves per pole; the stator winding includes a plurality of groups of the groove conductor each having a plurality of groove conductors corresponding to a single phase, formed by the arrangement 10 of the groove conductors to form a specific layer over a predetermined number of successive grooves NSPP; in each group of the groove conductor, groove conductors in a 2nd layer, counting on an inner circumferential side of the grooves, are arranged with a displacement relative to the groove conductors in a first layer 15 by a groove m-level in one direction that runs along a circumference of the stator center and groove conductors in one (2m - 1) layer, excluding the first layer, are arranged with a displacement with respect to the groove conductors in the first layer by one (m - 1) ) groove level in one direction; and NSPP represents a number of 20 slots per phase per pole, a number of layers is expressed as 2 x NL and m = 1.2, NL.
According to the fourth aspect of the present invention, in the rotating electrical machine according to any one of aspects 1 to 3, it is preferred that the round windings are each formed by connecting a plurality of segment conductors.
According to the fifth aspect of the present invention, in the rotating electrical machine according to any one of aspects 1 to 4, it is preferred that the groove conductors are formed with steel cable. According to the sixth aspect of the present invention, in the rotating electrical machine according to any of aspects 1 to 5, it is preferred that the stator winding includes a plurality of Y connections and there is no phase difference that manifests between the stresses induced in the windings of the same phase in a plurality of Y connections.
In accordance with the seventh aspect of the present invention, a vehicle comprises: an electric rotating machine according to any one of aspects 1 to 6; a battery that provides DC power; and a conversion device that converts the DC energy resulting from the battery into AC energy and supplies AC energy to the rotating electrical machine, in which: the torque generated in the rotating electrical machine is used as a driving force to drive the vehicle. Advantageous effect of the invention
The present invention achieves noise reduction in a rotating electric machine and a vehicle equipped with the rotating electric machine. Brief description of the drawings Figure 1 is a schematic diagram showing the structure of a hybrid electric vehicle; Figure 2 is a diagram of the circuit belonging to the energy conversion device 600; Figure 3 is a cross-sectional view of the rotating electric machine 200; Figure 4 is a cross-sectional view of stator 230 and rotor 250; Figure 5 is a perspective view of stator 230; Figure 6 is a connection diagram pertaining to the stator winding 238; Figure 7 is a detailed connection diagram pertaining to the U phase winding; Figure 8 is a part of the U1 phase winding group in an expansion; Figure 9 is a part of the U2 phase winding group in an expansion; Figure 10 is a diagram indicating the positional arrangement with which the conductors of the groove 233a are arranged; 11 are diagrams indicating the positioning between the conductors of the groove 233a; Figure 12 is a diagram showing the waveforms of the induced voltage; Figure 13 is a diagram that provides results obtained by analyzing the highest harmonic component in the induced voltage waveforms; Figure 14 is a diagram indicating waveforms of the torque induced by supplying an AC current; Figure 15 is a diagram that provides the results obtained by analyzing the highest harmonic component in the torque waveforms; Figure 16 is a detailed connection diagram pertaining to the winding of phase U obtained in a second mode; Figure 17 is a diagram indicating the positional arrangement with which the conductors of the groove 233a are arranged in the second mode; Figure 18 is a detailed connection diagram that belongs to a part of the phase U winding obtained in a third embodiment; Figure 19 is a diagram indicating the positional arrangement with which the conductors of the groove 233a are arranged in the third mode; Figure 20 is another example of a positional arrangement that can be adopted for the groove conductors when the number of grooves per phase per pole (NSPP) is 2 and the number of layers (2 x NL) is 4; Figure 21 are examples of groove conductor groups that 25 can be configured when the number of grooves per phase per pole (NSPP) is 2 and the number of layers (2 x NL) is 4; Figure 22 are examples of groove conductor groups that can be configured when the number of grooves per phase per pole (NSPP) is 2 and the number of layers (2 x NL) is 6; Figure 23 are examples of groove conductor groups that can be configured when the number of grooves per phase per pole (NSPP) is 3 and the number of layers (2 x NL) is 4. Description of modalities
The following is a description of the modalities of the present invention, determined by reference to the drawings.
First Mode 5 The rotating electric machine according to the present invention achieves noise reduction by reducing the extent of torque ripple. For this reason, it is ideal in applications where it is used as a travel motor for an electric vehicle. While the rotating electric machine according to the present invention can be adopted in a pure electric vehicle 10 engaged in the travel operation exclusively in a rotating electric machine or in a hybrid type electric vehicle driven by one. engine and a rotating electric machine, the following description is given assuming that the present invention is adopted in a hybrid type electric vehicle. FIG. 1 is a schematic illustration showing the structure of an electric vehicle of the hybrid type having installed the rotating electric machines obtained in one mode. A motor 120, a first rotating electric machine 200, a second rotating electric machine 202 and a battery 180 are mounted on a vehicle 100. Battery 180 supplies 20 DC power to the rotating electrical machines 200 and 202 via a conversion device energy 600 when the driving forces transmitted by the rotating electrical machines 200 and 202 are required, in which it receives the DC energy from the rotating electrical machines 200 and 202 during a regenerative travel operation. Battery 180 and rotating electrical machines 200 and 202 exchange DC power via the power conversion device 600. In addition, although not shown, a battery that provides low voltage power (for example, 14 V power) is installed in the vehicle to supply DC power to the control circuits described below. 30 The rotational torque generated through the motor 120 and the rotating electric machines 200 and 202 is transmitted to the front wheels 110 through a transmission 130 and a differential gear unit 160.
Transmission 130 is controlled by a transmission control device 134, where engine 120 is controlled by an engine control device 124. Battery 180 is controlled by a battery control device 184. The transmission control device 134, the motor control device 124, the battery control device 184, the energy conversion device 600 and an integrated control device 170 are connected to each other via a communication line 174.
The integrated control device 170, which is a higher-order control device with respect to transmission control device 134, engine control device 124, energy conversion device 600 and battery control device 184 , it receives, through communication line 174, information resulting from the transmission control device 134, the engine control device 124, the energy conversion device 600 and the battery control device 184, which indicates the status on the devices lower individual order control. Based on the information received, the integrated control device 170 generates, through arithmetic operation, a control command for each corresponding control device. The control command generated through the arithmetic operation is then transmitted to the particular control device via the communication line 174.
The high voltage battery 180, consisting of cells from the secondary battery such as cells from the lithium-ion battery or cells from the nickel hydride battery, is capable of emitting high voltage DC power in a range of 250 to 600 v or taller. The battery control device 184 sends, via communication line 174, information indicating the state of charge / discharge in the battery 180 and the states of the units of the individual battery cell that constitutes the battery 180 to the integrated control device 170.
In the judgment, based on the information provided by the battery control device 184, that the battery 180 needs to be charged, the integrated control device 170 issues a power generation operation instruction to the power conversion device 600. The primary functions of the integrated control device 170 still include the management of the torque emitted from the motor 120 and the rotating electrical machines 200 and 202, the arithmetic processing performed to calculate all the torque representing the sum of the torque emitted from the motor 120 and the torques emitted 5 from the rotating electrical machines 200 and 202, and to calculate a torque distribution index of this, and transmission of the control commands generated based on the results of the arithmetic processing to the transmission control device 134, the engine control device 124 and the energy conversion device 600. Based on a torque 10 command issued by the integrated control device o 170, the energy conversion device 600 controls the rotating electrical machines 200 and 202 to emit p torque or generate electrical energy as indicated in the control.
The energy conversion device 600 includes energy semiconductors that constitute inverters by which the rotating electrical machines 200 and 202 are engaged in operation. The energy conversion device 600 controls the switching operation of the energy semiconductors based on a command issued by the integrated control device 170. Since the energy semiconductors are engaged in the switching operation as described above, the rotating electrical machines 200 20 and 202 are activated to operate as an electric motor or as a power generator.
When the rotating electrical machines 200 and 202 are engaged in operation as electric motors, the DC power supplied from the high voltage battery 180 is supplied to the DC terminals of the inverters on the 600 power version device. The 600 power conversion device controls the switching operation of the power semiconductors to convert the DC power supplied to the inverters to the three-phase AC power and supply the three-phase AC power to the rotating electrical machines 200 and 202. By engaging the rotating electrical machines 200 and 202 in operation as generators , the 30 rotors of the rotating electrical machines 200 and 202 are rotary driven with a rotational torque applied to it from the outside and thus, the three-phase AC energy is generated in the winding of the stators of the rotating electrical machines 200 and 202. The three-phase AC energy then generated is converted into DC energy in the energy conversion device 600 and the high voltage battery 180 .. is charged with the DC power supplied to it. FIG. 2 is a diagram of the circuit belonging to the energy conversion device 5 shown in FIG. 1. The energy conversion device 600 includes a first inverter device for the rotary electrical machine 200 and a second inverter device for the rotary electrical machine 202. The first inverter device comprises a power module 610, a first circuit of drive 652 that controls the switching operation of the energy semiconductors 21 in the power module 610 and a current sensor 660 that detects an electric current in the rotating electrical machine 200. The drive circuit 652 is arranged on a circuit board drive 650. The second inverter device comprises a power module 620, a second drive circuit 656 that controls the switching operation of the power semiconductors 21 in the power module 620 and a current sensor 662 that detects a current electrical machine on rotating electrical machine 202. The drive circuit 656 is arranged on a drive circuit board 654. A circuit control 648 disposed on a control circuit board 646, a capacitor module 630 and a transmit / receive circuit 644 mounted on a connector plate 642 are all shared by the first inverter device and the second inverter device. Power modules 610 and 620 are engaged in operation 25 with drive signals emitted from the corresponding drive circuits 652 and 656. Power modules 610 and 620 convert the DC power supplied from battery 180 into three-phase AC power and supply AC power three-phase resulting from conversion to a stator winding that constitutes a armature winding of the corresponding rotating electrical machine 30 or 202. In addition, power modules 610 and 620 convert the AC energy induced in the stator windings of rotating electrical machines 200 and 202 in DC power and supply the DC power resulting from conversion to the high voltage battery 180.
As indicated in FIG. 2, power modules 610 and 620 include a three-phase bridge circuit made up of serial circuits corresponding to one of the three phases electrically connected in parallel 5 between the positive pole side and the negative pole side of the battery 180. Each serial circuit includes an energy semiconductor 21 which constitutes an upper arm and an energy semiconductor 21 constituting a lower arm connected in series. Since power module 610 and power module 620 adopt circuit structures substantially identical to one another as shown in FIG. 2, the following description focuses on the power module 610 chosen as a representative example.
The elements of the switching energy semiconductor used in the modality are IGBTs (isolated grid bipolar transistors) 21. An IGBT 21 includes three electrodes; a collector electrode, an emitter electrode and a door electrode. A diode 38 is electrically connected between the collecting electrode and the emitting electrode of the IGBT 21. Diode 38 includes two electrodes; a cathode electrode and an anode electrode, with the cathode electrode electrically connected to the IGBT 21 collector electrode and the anode electrode electrically connected to the IGBT 21 emitter electrode to define the direction the emitter electrode travels towards the collector electrode in the IGBT 21 as a forward direction.
It should be noted that MOSFETs (metal - oxide - semiconductor field effect transistors) can be used as the elements of the switching energy semiconductor. A MOSFET includes three electrodes; a drain electrode, a source electrode and a door electrode. MOSFET does not require a 38 diode, as shown in FIG. 2, since it includes a parasitic diode with which the direction that runs from the drain electrode towards the source electrode is defined as the forward direction, present between the source electrode and the drain electrode. 30 The upper and lower arms on the serial circuit corresponding to a given phase are configured by electrically connecting the emitting electrode of one IGBT 21 and the collecting electrode of another IGBT 21 in series. It should be noted that while FIG. shows the upper arm and the lower arm corresponding to a given phase each constituted with a single IGBT, a large current control capacity needs to be guaranteed in the modality and thus, a plurality of IGBTs are connected in parallel 5 to constitute an upper arm or a lower arm on the actual power module. However, for simplification purposes, the following explanation is given assuming that each arm is made up of a single energy semiconductor.
In the embodiment described with reference to FIG. 2, each upper or lower arm, corresponding to one of the three phases, is actually configured with three IGBTs. With respect to each arm, the collector electrode of the IGBT 21 that constitutes the upper arm in a given phase is electrically connected to the side of the positive pole of the battery 180, in which the source electrode of the IGBT 21 that constitutes the lower arm in a given phase is electrically connected to the side of the negative pole of the battery 180. A midpoint between the arms corresponding to each phase (an area where the IGBT emitting electrode on the upper arm side and the IGBT collecting electrode on the lower arm side are connected ) is electrically connected to the armature winding (stator winding) in the corresponding phase on the corresponding 200 or 202 rotating electrical machine. The drive circuits 652 and 656, which constitute the drive units in which the corresponding inverter devices 610 and 620 are controlled, generate drive signals used to drive the IGBTs 21 based on a control signal emitted from the control circuit 648 The drive signals generated in the individual drive circuits 652 and 656 are respectively output to the gates of the various elements of the power semiconductor in the corresponding power modules 610 and 620. The drive circuits 652 and 656 are configured as a block consisting of six integrated circuits that generate drive signals to be supplied to the lower and upper arm doors corresponding to the various phases. The control circuit 648, which controls the inverting devices 610 and 620, consists of a microcomputer that generates, through arithmetic operation, a control signal (a control value) based on which the plurality of semiconductor elements switching power is engaged in operation (on / off). A 5 torque command signal (a torque command value) provided from a higher-order control device, the sensor emits from the current sensors 660 and 662, and the sensor emits from the rotation sensors mounted on the rotating electrical machines 200 and 202 are inserted into the control circuit 648. Based on these signals inserted in it, the control circuit 648 calculates the control values and sends the control signals to the drive circuits 652 and 656 to be used to control the switching period.
The transmission / reception circuit 644 mounted on the connector plate 642, which electrically connects the energy conversion device 600 with an external control device, is engaged in the exchange of 15 information with another device through the communication line 174 shown in FIG. 1. Capacitor module 630, which constitutes a smoothing circuit through which an extension of the DC voltage fluctuation that occurs as the IGBTs 21 are engaged in the switching operation is reduced, is electrically connected in parallel with the terminals on side 20 DC of the first power module 610 and the second power module 620. FIG. 3 shows the rotating electric machine 200 in FIG. 1 in a cross-sectional view. It should be noted that since the structure of the rotary electric machine 200 is substantially identical to that of the rotary electric machine 202, the following description focuses on the structure adopted on the rotary electric machine 200, considered as a representative example. However, the structural functions described below do not need to be adopted on both rotating electrical machines 200 and 202, as long as they are adopted on one of them.
A stator 230, held within a housing 212, includes a center of stator 232 and a winding of stator 238. On the inner circumferential side of the center of stator 232, a rotor 250 is rotatably maintained over an air gap 222. The rotor 250 includes a rotor center 252 attached to an axis 218, permanent magnets 254 and non-magnetic contact plates 226. Housing 212 includes a pair of end supports 214 in each of which a bearing 216 is arranged. Axis 218 is rotatably maintained through bearings 216. 5 A solver 224, which detects the positions of the poles on rotor 250 and the rotational speed of rotor 250, is arranged on axis 218. An emission from solver 224 is considered in the control circuit 648 shown in FIG. 2. The control circuit 248 emits a control signal, generated based on the emission considered, to the drive circuit 652. The drive circuit 652, in turn, emits a drive signal, generated based on the control signal. , to the power module 610. In the power module 610, a switching operation is performed based on the control signal to convert the DC power, supplied from battery 180, into three-phase AC power. This three-phase AC power is supplied to the winding of the stator 238 shown in FIG. 3 and, as a result, a rotating magnetic field is generated in stator 230. The frequency of the three-phase AC current is controlled based on a detection value provided by resolver 224 and the phases of the three-phase AC current with respect to rotor 250, also are controlled based on the detection value provided by resolver 224. 20 FIG. 4 shows stator 230 and rotor 250 in a cross-sectional view through A-A in FIG. 3. It should be noted that FIG. 4 does not include an illustration of housing 212, shaft 218 and stator winding 238. Several grooves 237 and teeth 236 are formed in a uniform pattern along the entire internal circumference of the center of stator 232. Reference numerals 25 only a representative groove and an adjacent tooth are included in FIG. 4. Within the grooves 237, a groove insulator (not shown) is arranged and a plurality of phase windings corresponding to phase U, phase V and phase W, which constitutes the stator winding 238 in FIG. 3, is installed in the grooves 237. Seventy-two grooves 237 are formed at equal intervals in the modality.
In addition, twelve holes 253, in the rectangular magnets that must be inserted, are formed close to the outer circumference of the center of rotor 252, at equal intervals along the circumferential direction. In each hole 253, with its depth varying along the axial direction, a permanent magnet 254 is embedded and fixed with an adhesive or the like. The holes 253 are formed to reach a greater width, measured along the circumferential direction, compared to the width of the permanent magnets 254 (254a and 254b) measured along the circumferential direction and thus, spaces of the hole 257, present on both sides of each permanent magnet 254, act as magnetic slots. These spaces of hole 257 can be filled with an adhesive or they can be sealed together 10 with permanent magnets 254 using a forming resin. The permanent magnets 254 function as field poles of the rotor 250 and the rotor in this mode assumes a structure of the poly 12.
The permanent magnets 254 are magnetized along the radial direction, and the magnetization direction is reversed from one field pole to the next 15. Namely, assuming that the surface of a permanent magnet 254a facing the stator and the surface of the permanent magnet 254a located on the axial side respectively reaches polarity N and polarity S, the surface on the stator side and the surface on the axial side of a permanent magnet 254b disposed close to permanent magnet 254a respectively reaches polarity 20 S and polarity N. Such permanent magnets 254a and 254b are arranged in an alternative pattern along the circumferential direction.
Permanent magnets 254 can be magnetized first and then embedded in holes 253, or they can be inserted into holes 253 in the center of rotor 252 in a demagnetized and then magnetized state 25 by applying an intense magnetic field to the inserted permanent magnets. Once magnetized, permanent magnets 254 exert a strong magnetic force. This means that if permanent magnets 254 are polarized before they are fitted to rotor 250, the strong attraction force that occurs between permanent magnets 254 and the center of rotor 252 is likely to present an obstacle during the magnet installation process. permanent. In addition, the strong attraction force transmitted by permanent magnets 254 can cause foreign matter such as iron dust to stabilize in permanent magnets 254. For this reason, it is more desirable from the point of view of maximum productivity to produce the rotating electric machine, to magnetize permanent magnets 254 after being inserted in the center of rotor 252. 5 Permanent magnets 254 can be sintered magnets based on neodymium, sintered magnets based on samarium, ferrite magnets or bonded magnets based on neodymium. The residual magnetic flux density of permanent magnets 254 is approximately 0.4 to 1.3 T.
Since the rotating magnetic field is induced in the stator 230 by 10 three-phase AC currents (the three-phase AC currents that flow through the winding of the stator 238), the torque is generated with the rotating magnetic field acting on the permanent magnets 254a and 254b in the rotor 250. This torque can be expressed as the product of the component in the magnetic flux transmitted from the permanent magnets 254, which interconnect with a given phase winding, and the component in the AC current flowing through a phase winding, which it is perpendicular to the magnetic interconnection flow. Since AC currents are controlled to achieve a sine waveform, the product of the fundamental wave component in the interconnecting magnetic flux and the fundamental wave component in the corresponding AC current represents the average torque component and the product of the highest harmonic component in the magnetic interconnection flow and the fundamental wave component in the AC current represents the torque ripple, that is, the highest harmonic component of the torque. This means that the torque ripple can be reduced by reducing the highest harmonics component in the magnetic interconnection flow. In other words, since the product of the interconnecting magnetic flux and the angular acceleration with which the rotor rotates represents the induced voltage, reducing the highest harmonic component in the magnetic interconnecting flux is equivalent to reducing the highest harmonic component in the voltage induced. FIG. 5 shows stator 230 in perspective. The winding of the stator 238 in the mode is wound around the center of the stator 232 adopting a wave winding pattern. The ends of the coil 241 of the stator winding 238 are formed on the two end surfaces of the center of the stator 232. In addition, the lead wires 242 of the stator winding 238 are positioned on the side where one of the end surfaces of the center of the stator 232 is to locate. Three lead wires 242 5 are positioned in correspondence to phase U, phase V and phase W. In the connection diagram in FIG. 6 which belongs to the stator winding 238, the connection method and the relationship of the electrical phase between the phases of the individual phase windings are indicated. The stator 238 winding in the modality is obtained by adopting a double 10 star connection, in which a first star connection made with a U1 phase winding group, a V1 phase winding group and a phase winding group W1 is connected in parallel with a second star connection made with a phase winding group U2, a phase winding group V2 and a phase winding group W2. The winding group 15 of phase U1, the winding group of phase V1, the winding group of phase W1, the winding group of phase U2, the winding group of phase V2 and the winding group of phase W2 are constituted with four round windings (current round windings). Namely, the phase winding group U1 includes round windings U11 20 to U14, the phase winding group V1 includes round windings V11 to V14, the phase winding group W1 includes round windings W11 to W14, the winding group phase U2 includes round windings U21 to U24, the phase winding group V2 includes round windings V21 to V24 and the phase winding group W2 includes round windings W21 to W24.
As shown in FIG. 6, structures substantially identical to those adopted in correspondence to phase U are assumed for phase V and phase W, and the group of individual phase windings in each star connection is arranged so that the induced voltage phase 30 in one the base winding group is displaced at 120 ° at the electrical angle with respect to the phase of the voltage induced in the next base winding group along a given direction. In addition, the angles formed by the round windings in the group of individual phase windings represent with respect to the phases. While the stator 238 winding in the mode is obtained by adopting the double star connection (2Y) with two star connections connected in parallel, as shown in FIG. 6, 5 the stator winding 238 can also adopt a single star connection (1Y) with two star connections connected in series, depending on the voltage level required to drive the rotating electrical machine. FIG. 7 provides a detailed connection diagram pertaining to the U phase winding groups that form a part of the stator winding 238, with FIG. 7 (a) showing the round windings U13 and 1114 in the phase winding group U1, FIG. 7 (b) showing the round windings U11 and U12 in the winding group of phase U1, FIG. 7 (c) showing the round windings U21 and U22 in the phase winding group U2 and FIG. 7 (d) showing the round windings 15 U23 and U24 in the winding group of phase U2. As previously explained, seventy-two grooves 237 are formed in the center of stator 232 (see FIG. 4) and reference numerals 01, 02, ~ 71, 72 in FIG. 7 are slot numbers each assigned to a specific slot.
The following description will be given with reference to a part of a round winding which is inserted through a groove as a groove conductor and referring to a part of the round winding which varies over the grooves like a cross conductor. The round windings U1 to U24 are made with groove conductors 233a inserted through the grooves and transverse conductors 233b that connect the ends of the groove conductors 233a inserted through the different grooves, which are located on a specific side, for form an end of the coil 241 (see FIG. 5). For example, the end of a conductor in slot 233a inserted through slot 237 assigned with slot No. 55 in FIG. 7 (a), located on the upper side in FIG., 30 is connected to the upper end of a conductor in the groove 233a inserted through the groove 237 assigned to the groove No. 60 through a cross conductor 233b that forms an upper end of the coil , wherein the lower end of a conductor in slot 233a inserted through slot 237 assigned with slot No. 55 is connected to the lower end of the conductor in slot 233a inserted through slot 237 assigned with slot No. 48 through a conductor cross 233b that forms a lower end of the coil. A round winding with a wave winding pattern is formed by connecting the conductors of the groove 233a through the transverse conductors 233b as described above.
As will be explained in detail later, four conductors from slot 233a are inserted side by side, from the inner circumferential side to the outer circumferential side, within each slot in the modality. These four conductors in the groove will be referred to as a layer 1, a layer 2, a layer 3 and a layer 4, starting on the inner side and moving towards the outer side. In FIG. 7, the groove conductors in the round windings U13, U14, U21 and U22, which form layer 1, are indicated by the solid lines and the groove conductors in the round windings U13, U14, U21 and U22, which form layer 2, are indicated by the lines of the current of a point. The groove conductors in the round windings U11, U12, U23 and U24, which form layer 3, are started by the solid lines and the groove conductors in the round windings U11, U12, U23 and U24, which form layer 4, are indicated along the lines of the current of a point.
It should be noted that the round windings U11 to U24 can be formed using a continuous single-piece conductor or they can be formed by the first coils of the insertion segment (segment conductors) through the grooves and then connecting the segment coils through a welding or the like. The use of the coils of the segment is advantageous at the ends of the coil 241 located at the two ends facing opposite each other along the axial direction, even beyond the ends of the center of the stator 232, they can be formed in advance before inserting the coils of the segment through slots 237, which makes it possible to easily create an optimal insulation distance between different phases or within a given phase. Such an optimum isolation distance is connected to ensure effective isolation through a partial discharge disruption attributable to the voltage caused as IGBTs 21 are engaged in the switching operation.
In addition, while the conductive material used to form the round windings can be a flat rectangular wire or a round wire or it can be a conductive material made with several thin cables connected together, the round winding is ideally formed using a steel cable to increase the space factor to finally achieve a compact rotary electric machine guaranteeing the highest emission and achieving the highest efficiency. FIGS. 8 and 9 respectively provide enlarged views of the parts of the phase winding group U1 and of the phase winding group U2 in FIG. 7. FIGS. 8 and 9 provide a view of a part of the U1 phase winding group or the U2 phase winding group explaining approximately four poles, which includes the area where an interconnecting wire is present. As shown in FIG. 8 (b), the stator winding group U1, which begins at the lead wire, enters the groove assigned with groove No. 71 as a layer 4 conductor in the groove, and then extends through a cross conductor 233b over a strip equivalent to five slots before entering the slot assigned with slot No. 66 as a layer 3 conductor of slot 233a. Then, leave it at the position of layer 3 in the slot assigned with slot No. 66, travel over the strip equivalent to seven slots and move to the slot assigned with slot No. 59 as a layer 4 conductor in the slot.
In other words, the stator winding is wound by which it takes on a pattern of the wave winding until it surrounds the center of stator 232 by a complete turn that has the position of layer 3 in the slot assigned with slot No. 06 with its conductors transverse 233b located on the end side of the coil (the lower side in FIG.) where the lead wire is positioned, running over the grooves with the level of the Np groove defined at 7 and its transverse conductors 233b, located on the opposite end of the end of the coil running over the grooves with the groove level Np defined at 5. This stator winding that surrounds the center of the stator substantially by a complete rotation forms the round winding U11 shown in FIG. 6.
Then, the stator winding, being left in the position of layer 3 in the slot assigned with slot No. 06, travels over the strip equivalent to six slots and then moves to the slot assigned with slot No. 72 as a layer 4 conductor. the slot. The part of the stator winding at the position of layer 4 in the groove assigned with the groove No. 72 and still constitutes the round winding U12 shown in FIG. 6. As is the round winding U11, the round winding U12 is formed by the sinuosity of the wave the stator winding to surround the center of stator 232 by a complete turn until the position of layer 3 in the groove assigned with the No groove 06, with the transverse conductors 233b located on the side where the lead wire is present, running over the grooves with the groove level Np defined at 7 and the transverse conductors 233b located on the opposite side running over the grooves with the groove level Np set to 5. This stator winding that surrounds the center of the stator by substantially a complete turn forms the U12 round winding.
It should be noted that since the round winding U12 is wound around the center of the stator with a displacement with respect to the round winding U11, which is equivalent to a level of the groove 1, a phase difference in the electrical angle equivalent to the level of the groove 1, manifests itself. The level of the slot 1 is equivalent to 30 ° in the electrical angle in the modality, and certainly, FIG. 6 clearly shows that the round winding U11 and the round winding U12 are offset with respect to each other by 30 °.
The stator winding, being left in the position of layer 3 in the slot assigned with slot No. 07, moves to the slot assigned with slot No. 72 as a conductor of layer 2 of the slot (see FIG. 8 (a)) through the interconnection wire that runs over the strip equivalent to the seven slots. Subsequently, the stator winding is wound around the center of stator 232 to completely surround the center of stator 232, from the position of layer-2 in the slot assigned with slot No. 72 through the position of layer-1 on groove assigned to groove No. 07, with the transverse conductors 233b located on the side where the 5 lead wire is present that runs over the grooves with the level of the groove Np defined at 7 and the transverse conductors 233b, located on the opposite side that runs over the grooves with the groove level Np defined at 5, in the same way that with the stator winding it forms the round windings U11 and U12. This stator winding that surrounds the center of the stator substantially a full turn forms the round winding U13 shown in FIG. 6.
It should be noted that, like FIG. 8 clearly indicates, the round winding U13 is rolled without an offset from the round winding U12 along the circumferential direction. This means that there is no phase difference between the round winding U12 and the round winding U13. Of course, FIG. 7 shows the U12 and U13 round windings without any phase difference manifesting between them.
Finally, the stator winding, being left in the position of layer-1 in the slot assigned with slot No. 07, travels over the strip equivalent to six slots and then moves to the slot assigned with slot No. 01 as a layer conductor. 2 of the slot. Subsequently, the stator winding is wound around the center of stator 232 to surround the center of stator 232 by a complete turn, from the position of layer-2 in the slot assigned with slot No. 01 through the position of layer 25-1 in the slot assigned to slot No. 08, with the transverse conductors 233b, located on the side where the lead wire is present, running over the grooves with the level of the Np groove defined at 7 and the transverse conductors 233b, located on the opposite side , running over the grooves with the groove level Np defined at 5, in the same way as 30 with which the stator winding forms the round windings U11, U12 and U13. This stator winding that surrounds the center of the stator substantially a complete turn forms the round winding U14 shown in FIG. 6.
It should be noted that since the round winding U14 is wound around the center of the stator with a displacement with respect to the round winding U13 by one level of the groove 1, a phase difference in the electrical angle equivalent to the level of the groove 1, manifests itself . Of course, FIG. 8 clearly shows that the round winding U13 and the round winding U14 are offset by 30 °.
The round windings in the stator winding group U2 shown in FIG. 9, too, are wound with a wave winding pattern with the transverse conductors running over the grooves with the groove levels defined as in the stator winding group U1. The round winding U21 is wound around to surround the center of the stator from the position of layer-1 in the slot assigned with slot No. 14 through the position of layer-2 in the slot assigned with slot No. 07, in which the winding round U22 is rolled around to surround the center of the stator from the position of layer-1 in the slot assigned with slot No. 13 through the position of layer-2 in the slot assigned with slot No. 06. Subsequently, the stator winding , being left in the position of layer-2 in the groove assigned with groove No. 06 moves to the groove assigned with groove No. 13 as a conductor of layer 3 of the groove through the interconnecting wire and is wound around like the round winding U23 until it enters the slot assigned with slot No. 06 as a layer 4 conductor in the slot. Subsequently, the stator winding is wound to surround the center of the stator from the position of layer 3 in the slot assigned with slot No. 12 through the position of layer 4 in the slot assigned with slot No. 05, as soon as they form the round winding. U24.
As described above, the stator winding group U1 is made with the round windings U11, U12, U13 and U14, and a voltage representing the sum of the stresses generated in the various assumed phases for the individual round windings combined together is induced in the group of the stator winding U1. Likewise, the voltage representing the sum of the voltages generated in the various phases assumed for the round windings U21, U22, U23 and U24 combined together is induced in the stator winding group U2. While the stator winding group U1 and the stator winding group U2 are connected in parallel as shown in FIG. 6, there is no phase difference between the voltage induced in the group of the stator winding U1 and the voltage induced in the group of the stator winding U2 and, for this reason, uneven conditions are manifested, for example, a circulating current, there is not even the winding of the stator groups U1 and U2 being connected in parallel.
In addition, the transverse conductors 233b are made to run over the grooves with the defined groove level Np (number of grooves per pole +1) on one side of the coil end and are made to run over the grooves with the groove level Defined np (number of grooves per pole -1) on the other side of the coil end. In addition, the round windings are wound ensuring that there is no phase difference between the round winding U12 and the round winding U13 and that there is no phase difference between the round winding U22 and the round winding U23. Through these measurements, the arrangement is positioned as shown in FIG. 10 is obtained for the conductors of the groove 233a. FIG. 10 shows the positional arrangement with which the conductors of the groove 233a are arranged in the center of the stator 232 in a view illustrating the part of the center of the stator 232 that varies from the grooves No. 71 to the groove No. 12 in FIGS. 7 to 9. It should be noted that the rotor rotates along the direction it travels from the left of the figure to the right of FIG. In the modality, twelve grooves 237 are formed in correspondence to the two poles, that is, over a range of 360 ° in the electrical angle. This means that the strip from slot No. 01 to slot No. 12 in FIG. 10, for example, corresponds to the two poles. Thus, the number of grooves per pole is six, where the number of grooves per phase per NSPP pole is 2 (= 6/3). Four conductors from groove 233a in the stator winding 238 are inserted into each groove 237.
Within each rectangle that represents a conductor in slot 233a, a specific code between codes U11 to U24, V and W that indicates phase U, phase V and phase W, and a filled circle mark that 5 indicates the direction running from the lead wire to the neutral point or a cross "x" indicating the opposite direction are shown. In addition, a conductor of groove 233a present on the innermost circumferential side of groove 237 (towards the bottom of the groove) will be referred to as a layer 1 conductor of the groove, and subsequent conductors of groove 233a in a groove 237 will be referred to as a groove layer 2 conductor, which is defined next to the innermost groove conductor 233a, a groove layer 3 conductor and a groove layer 4 conductor, which is located on the outermost circumferential side (closest to the opening the slot). In addition, reference numerals 01 through 12 are slot numbers similar to those shown in FIGS. 7 to 9. It should be noted that U 233a phase groove conductors alone are included with codes U11 to U24 which indicate the corresponding round windings, where V 233a groove conductors and W 233a groove conductors are included with codes V and W, simply indicating the corresponding phases.
The eight conductors of the groove 233a within each dotted line closure 234 in FIG. 10 are all conductors of the U 233a phase slot. For example, the groove conductor group 234 within the central lock includes groove conductors 233a in the round windings 25 U24 and U23 which assume the positions of layer-4 in the grooves assigned with the Nos groove. 05 and 06 respectively, the conductors of the groove 233a in the round windings U11 and U12 that assume the positions of layer-3 in the grooves assigned with the groove Nos. 06 and 07 respectively, conductors of the groove 233a in the round windings U22 and U21 30 that assume positions of layer-2 in the grooves assigned with the groove Nos. 06 and 07 respectively and conductors of the groove 233a in the round windings U13 and U14 that assume the positions of layer-1 in the grooves assigned with the groove Nos. 07 and 08 respectively.
When the number of grooves per pole is six, the number of grooves per phase per pole is 2 and the number of conductors in groove 233 inserted in layers in each groove 237 is 4, the conductors of the U 233a phase groove (and the conductors of the phase groove V 233a and the conductors of the phase groove W 233a) are generally arranged adopting a positional arrangement as shown in FIG. 11 (a). In this positional arrangement, the groove conductor group on the right side in FIG. and the groove conductor group on the left side in FIG. they are set away from each other with a groove level six.
The positional arrangement shown in FIG. 11 (b), which is adopted in the modality, is distinguishable from the arrangement in which the conductor air of the groove 233a in layer 1 (L1) in each group of the groove conductor is displaced by a groove level along the direction in which the rotor rotates (towards the right side in FIG.) and that the conductor pair of the groove 233a in layer 4 (L4) in the groove conductor group is displaced by one level of the groove along the opposite direction of the direction of rotation (towards the left in FIG.). As a result, the cross conductor 233 that connects the groove conductor 233a in the round winding U11 having the position of layer 4 and the groove conductor 233a in the round winding U11 having the position of layer-3 (L3) travels over the grooves with a groove level 7, where the cross conductor 233 that connects the groove conductor 233a in the round winding U24 having the position of layer 4 and the groove conductor 233a in the round winding U24 having the position of layer-3 (L3) travels over grooves with a groove level 5. It should be noted that the opposite direction of the direction along which the rotor rotates will be referred to as a reverse direction of rotation in the following description.
In this positional arrangement, the conductors of the groove 233a corresponding to the groups of the conductor of the groove corresponding to phase V and phase W, as well as the conductors of groove 233a corresponding to phase U, are arranged with a displacement of the level of groove 1 and, as as a result, groups of the conductor of the groove 234 reaching identical shapes are formed in correspondence to phase U, phase V and phase W, as shown in FIG. 10. Namely, a groove conductor group made with groove conductors 233b corresponding to phase U and each 5 included with the filled circle mark, a groove conductor group made with groove conductors 233b corresponding to phase W and each included with the cross, a group of the groove conductor made with conductors of the groove 233b corresponding to phase V and each included with the filled circle mark, a group of the groove conductor made of 10 conductors of the groove 233b corresponding to the stage U and each included with the cross, a group of the groove conductor made with conductors of the groove 233b corresponding to phase W and each included with the circle mark filled, and a group of the groove conductor made of conductors of the corresponding 233b groove to phase V and each included with the cross are formed in this order along the direction in which the rotor rotates.
As shown in FIG. 10, the positional arrangement obtained in the modality is characterized in that: (a) the transversal conductors 233b connect the conductors of the groove 233a by each one that travels over the grooves with the level of the groove Np defined at N + 1 (= 7) on one side of the end of the coil and each one that runs over the grooves with the level of the groove Np set to N - 1 (= 5) on the other side of the end of the coil with N (= 6) representing the number of grooves per pole ; (b) the stator winding includes groups of groove conductor 234 made with a set of conductors in groove 223b corresponding to a single phase, which are inserted through a predetermined number Ns (= 4) of successive grooves that form a continuous strip along the circumference of the center of the stator to have successive positions of the groove and positions of the layer; and 30 (c) the predetermined number of grooves Ns is defined so that Ns = NSPP + NL = 4 with NSPP = (2) representing the number of grooves per phase per pole, when the number of layers is 2 x NL (NL = 2).
It should be noted that when groove conductors 223b are defined, they have successive groove positions and successive layer positions, groove conductors having corresponding layer positions are inserted into successive grooves 237 and groove conductors inserted through a single groove 237 have successive positions of the layer, as shown in FIG. 10. In the description of the mode, a set of conductors in the slot 233a arranged by adopting this positional arrangement will be referred to as a group of the conductor in the slot 234. 10 Form the groups of the conductor in the slot 234 made with conductors in the slot 233b corresponding to a single phase and arranged over a groove four varies as described above, an extent of torque ripple can be reduced, which, in turn, makes it possible to reduce noise in the rotating electrical machine and thus fulfills the objective of reducing noise in the rotary electric machine previously defined. FIG. 12 is a diagram of the waveform of the induced voltages. An L11 curve represents the waveform of the voltage induced in the rotating electrical machine reached in the mode, adopting the positioning of the groove conductor shown in FIG. 10, in which an L12 curve 20 represents the induced voltage waveform in a comparison example that adopts the structure disclosed in the patent literature 1. In addition, FIG. 13 presents the results obtained by conducting the highest harmonic analysis on the induced voltage waveforms shown in FIG. 12. FIG. 12 indicates that the induced voltage waveform represented by the closest L11 curve looks like the sine wave than the induced voltage waveform represented by the L12 curve. In addition, the results of the highest harmonic analysis shown in FIG. 13 indicate that the highest harmonic component of the fifth order and the highest harmonic component of the seventh order can be reduced by the significant extensions 30 through the modality. FIG. 14 is a diagram of the waveform that indicates the torque waveforms achieved by supplying an AC current in the rotating electrical machine in the mode and in the rotating electrical machine in the comparison example. In addition, FIG. 15 presents the results obtained by conducting the highest harmonic analysis on the torque waveforms in FIG. 14. The results of the highest harmonic analysis shown in FIG. 15 indicate that the waviness of the sixth order torque, in particular, can be reduced to a significant extent through the modality. The reduction in the ripple of the sixth order torque indicates the fifth order component and the seventh order component in the induced voltage, that is, the magnetic interconnection flow, can be reduced by the round winding with the arrangement illustrated in FIGS. 7 to 10. Second Mode
FIGS. 16 and 17 illustrate the second embodiment of the present invention obtained by adopting the present invention in a stator with the number of grooves per phase per NSPP pole defined at 2 and conductors of groove 233a inserted in each groove 237 in two layers. FIG. 16 is a detailed connection diagram pertaining to the phase U winding that forms part of the stator winding, with FIG. 16 (a) showing the phase winding group U1 and FIG. 16 (b) showing the U2 phase winding group. FIG. 17 shows the positional arrangement with which the conductors of the groove 233a are arranged in the center of the stator 232.
As shown in FIG. 16 (b), the round winding U11 in the winding group of phase U1, which begins at the lead wire, enters the groove assigned with groove No. 72 as a conductor of layer 2 of the groove, and then extends over a strip equivalent to five grooves as the cross conductor 233b before reaching the groove assigned with groove No. 67 as a layer 1 conductor of the groove. Then, leave it in the position of layer-1 in the slot assigned with slot No. 67, travel over a strip equivalent to seven slots and move to the slot assigned with slot No. 60 as a layer 2 conductor in the slot. Subsequently, the round winding is continuously wound in a pattern of the wave winding with the transverse conductors running over the groove strip 5 and the groove strip 7 alternatively until they are inserted through the groove assigned with groove No. 07 as a layer 1 conductor of the groove after surrounding the center of the stator 232 by substantially a complete turn. The winding that varies from a lead wire through the position of layer-1 in the groove assigned with the groove No. 07 forms the round winding U11.
The winding, being left in the position of layer-1 in the slot assigned with slot No. 07, travels over a strip equivalent to six slots then moves to the slot assigned with slot No. 01 as a layer 2 conductor of the slot. The round winding U12, which starts at the position of layer-2 in the groove assigned with groove No. 01, is continuously wound with the wave winding pattern with the transverse conductors that travel over the groove strip 5 and the groove strip 7 alternatively, as in the round winding U11, until it moves to the groove assigned with groove No. 08 as a conductor of the groove layer 1 after surrounding the center of stator 232 substantially by a complete grit.
The round windings in the U2 phase winding group are also wound with a wave winding pattern as are the round windings in the U1 phase winding group. The round winding U21 is wound with a wave winding pattern that varies from the position of layer-1 in the slot assigned with slot No. 14 through the position of layer-2 in the slot assigned with slot No. 07, where the U22 round winding is wound with a wave winding pattern that varies from the position of layer-1 in the slot assigned with slot No. 13 through the position of layer-2 in the slot assigned with slot No. 06.
FIG. 17 shows the positional arrangement with which the conductors of the groove 233a are arranged in the grooves assigned with the groove Nos. 01 to 12 and the slot Nos. 71 and 72. In this FIG., The level of the slot 12 that protects the slot assigned with slot No. 01 through the slot assigned with slot No. 12 corresponds to the two poles. The positional arrangement with which the conductors of the slot 233a corresponding to phase U, phase V and phase W are arranged as shown in FIG. 17 is identical to the positional arrangement with which the conductors of the groove 233a are arranged to have layer-1 and layer-2 positions in FIG. 10. In the modality, the set of four conductors of the groove 233a within each closure of the dotted line forms a single group of the conductor of the groove 234. The groups of the groove conductor 234 formed in the modality, also satisfy the conditions similar to those described with reference to the driver groups of the slot 234 (see FIG. 10) in the first mode. Namely: (a) the transversal conductors 233b connect the conductors of the groove 233a by each one that travels over the grooves with the groove level Np defined at N + 1 (= 7) on one side of the end of the coil and each one that run over the grooves with the groove level Np defined at N - 1 (= 5) on the other side of the coil end with N (= 6) representing the number of grooves per pole; (b) the stator winding includes groove conductor groups 234 made with a set of groove conductors 223b corresponding to a single phase, which are inserted through a predetermined number Ns (= 3) of consecutive grooves forming a continuous band along the circumference of the center of the stator to have the successive positions of the groove and positions of the layer; and (c) the predetermined number of grooves Ns is defined so that Ns = NSPP + NL = 3 with NSPP (= 2) representing the number of grooves per phase per pole, when the number of layers is 2 x NL (NL = 1).
Consequently, an extension of the torque ripple can be reduced and thus the noise in the rotating electric machine is reduced, thus finally reaching the previously defined objective, of noise reduction in the rotating electric machine, as in the first mode. Third Mode
FIGS. 18 and 19 illustrate the third embodiment of the present invention obtained by adopting the present invention in a stator with the number of grooves per phase per NSPP pole defined at 3 and groove conductors 233a inserted in each groove 237 in four layers. FIG. 18 is a detailed connection diagram pertaining to the U phase winding part, with FIG. 18 (a) showing the phase winding group U1 and FIG. 18 (b) showing the U2 phase winding group. FIG. 19 shows the positional arrangement with which the conductors of the groove 233a are arranged in the center of the stator 232.
As shown in FIG. 18, 108 the grooves are formed in the center of the stator 232 when the number of grooves per phase per NSPP pole is 3 and groove conductors 233a are inserted through each groove 237 in four layers (2 x NL). In such a stator, the phase winding group U1 and the phase winding group U2 are made with six round windings. In addition, the transverse conductors in the round windings run alternately over the grooves with a groove level 5 and a groove level 7.
In the phase winding group U1 shown in FIG. 18 (a), the coil extending from the position of layer 4 in the slot assigned with slot No. 105 through the position of layer 3 in the slot assigned with slot No. 07 constitutes a round winding U11, the coil extending from the position of layer 4 in the slot assigned with slot No. 106 through the position of layer 3 in the slot assigned with slot No. 08 constitutes the round winding U12 and the coil extending from the position of layer 4 in the slot assigned with slot No. 107 through the position of layer 3 in the slot assigned with slot No. 09 constitutes a round winding U13. The coil, being left in the position of layer 3 in the slot assigned with slot No. 09, moves to the slot assigned with slot No. 106 as a conductor of layer 2 of the slot through an interconnecting wire. The coil that extends from the position of layer-2 in the slot assigned with slot No. 106 through the position of layer-1 in the slot assigned with slot No. 08 constitutes a round winding U14, the coil that extends from the position of the layer-2 in the slot assigned with slot No. 107 through the position of layer-1 in the slot assigned with slot No. 09 constitutes a round winding U15, and the coil extending from the position of layer-2 in the slot assigned with slot No. 108 through the position of layer-1 in the slot assigned with slot No. 10 constitutes a U16 round winding.
In the phase winding group U2 shown in FIG. 18 (b), the coil extending from the position of layer-1 in the slot assigned with slot No. 19 through the position of layer-2 in the slot assigned with slot No. 09 constitutes a round winding U21, the coil that extends from the position of layer-1 in the slot assigned with slot No. 18 through the position of layer-2 in the slot assigned with slot No. 08 constitutes a round winding U22 and the coil extending from the position of layer-1 in the slot assigned with slot No. 17 through the position of layer-2 in the slot assigned with slot No. 07 constitutes a round winding U13. The coil, being left in the position of layer-2 in the slot assigned with slot No. 07, moves to the slot assigned with slot No. 18 as a conductor of layer 3 of the slot through an interconnecting wire. The coil extending from the position of layer 3 in the slot assigned with slot No. 18 through the position of layer 4 in the slot assigned with slot No. 08 constitutes a round winding U24, the coil extending from the position of layer 3 in the slot assigned with slot No. 17 through the position of layer 4 in the slot assigned with slot No. 07 constitutes a round winding U25, and the coil extending from the position of layer 3 in the slot assigned with slot No. 18 through the position of layer 4 in the slot assigned with slot No. 06 it forms a round winding U26.
FIG. 19 shows the positional arrangement with which the conductors of the groove 233a are inserted in the grooves assigned with the groove Nos. 01 to 18. In the modality, the level of the slot 18 that varies from slot No. 01 to slot No. 18 corresponds to the two poles. As Figure 18 indicates, round windings U14 to U16 and round windings U21 to U23 are inserted in grooves 237 alternatively as a conductor of layer 1 of the groove and as a conductor of layer 2 of the groove, in which the round windings U11 to U13 and round windings U24 to U26 are inserted into grooves 237 alternatively as a conductor of layer 3 of the groove and as conductor of layer 4 of the groove. A groove conductor group 1234 is formed with a set of twelve groove conductors 233a within the closure of the dotted line in FIG. 19. The twelve conductors in slot 233a are all part of the 12 round windings U11 to U16 and U21 to U26 corresponding to the phase.
Like the twelve conductors of the groove 233a corresponding to phase U, twelve conductors of the groove 233a corresponding to other phases, i.e., phase V or phase W, together form a group of the conductor of the groove. As in the first embodiment, a groove conductor group made with groove conductors 233b corresponding to phase U and each included with the filled circle mark, a groove conductor group made with groove conductors 233b corresponding to phase W and each one included with the cross a groove conductor group made with groove conductors 233b corresponding to phase V and one included with the filled circle mark, a groove conductor group made with groove conductors 233b corresponding to phase U and each included with the cross, a groove conductor group made with groove conductors 233b corresponding to phase W and each included with the filled circle mark, and a groove conductor group made with groove conductors 233b corresponding to phase V and each included with the cross are formed in this order along the direction in which the rotor rotates.
As FIG. 19 clearly indicates, the groove conductor groups 1234 formed in the embodiment, also, satisfy the conditions similar to those described with reference to the groove conductor groups 234 (see FIG. 10) in the first embodiment. Namely: (a) the transversal conductors 233b connect the conductors of the groove 233a for each one that runs over the grooves with the level of the groove Np defined at N + 1 (= 7) on one side of the end of the coil and that runs on grooves with the Np groove level set to N - 1 (= 5) on the other side of the coil end with N (= 6) representing the number of grooves per pole; (b) the stator winding includes groove conductor groups 234 made with a set of groove conductors 223b corresponding to a single phase, which are inserted through a predetermined number Ns (= 5) of consecutive grooves forming a continuous band along the circumference of the stator center to have successive positions of the groove and positions of the layer; and (c) the predetermined number of slots Ns is defined so that Ns = NSPP + NL = 5 with NSPP (= 3) representing the number of slots per phase per pole when the number of layers is 2 x NL (NL = 2 ).
Consequently, the extent of the torque ripple can be reduced and thus the noise in the rotating electric machine is reduced, thus finally reaching the goal of noise reduction in the rotating electric machine, as in the first and second modes. It is particularly notable that the grooves in the center of the stator in the embodiment include grooves in each of the four positions of the layer are all considered by the conductors of the groove 233a corresponding to a single phase, as shown in FIG. 19. This positional arrangement makes it possible to reduce an extent in which the torque is reduced by the twelve conductors of the groove 233a, which form a group of the groove conductor, inserted in the five successive grooves.
As the number of grooves per phase per NSPP pole increases, the orders of the high frequency component that can be eliminated by arranging the groove conductors with an offset groove level 1 as shown in the change in FIG. 11. For example, when NSPP = 2, the level of the groove 1 is equivalent to the electrical angle of 30 °. 30 ° is equal to a half cycle of the sixth order component, and thus, the fifth order induced stress component and the seventh order induced voltage component, that is, the component in the sixth order orders can be reduced, as indicated in FIG. 13. As NSPP is set to an even higher value, as in this modality, the level of groove 1 becomes shorter, making it possible to reduce the higher harmonic component of even higher orders
The positional arrangements shown in FIG. 10, in FIG. 17 and in FIG. 19, referred to in the description of the modalities, respectively represent; an example of a positional arrangement that can be adopted 5 when NSPP = 2 and the number of layers is 4, an example of a positional arrangement that can be adopted when NSPP = 2 and the number of layers is 2, and an example of a positional arrangement that can be adopted when NSPP = 3 and the number of layers is 4. However, the structural conditions (a), (b) and (c) below can be satisfied in the alternative positional arrangements like those shown in FIGS . 20 to 23. (a) Transverse conductors connect the groove conductors through which they travel over the grooves with the groove level Np set to N + 1 on one side of the end of the coil and which travels over the grooves with the groove level Np is set to N -1 on the other side of the coil end, with N representing the number of grooves per pole. (b) The stator winding includes groups of the groove conductor made with a set of groove conductors corresponding to a single phase, which are inserted through a predetermined number of consecutive grooves Ns that form a continuous strip along the circumference. the stator center to have successive slot positions and layer positions. (c) The predetermined number of grooves Ns is defined so that Ns = NSPP + NL with NSPP representing the number of grooves per phase per pole when the number of layers is 2 x NL. FIG. 20 presents another example of a positional arrangement that can be adopted when the number of grooves per phase per NSPP pole is 2 and the number of layers (2 x NL) is 4. While the conductors of the groove 233a are arranged in the positions of the layer -3 and in the positions of layer-4 with a positional arrangement identical to that shown in FIG. 10, 30 the conductors of the groove 233a are arranged in the positions of layer-1 and in positions of layer-2 adopting a different arrangement. In the positional arrangement shown in FIG. 10, the conductors of the groove 233a inserted in the positions of layer-1 are shifted to the right in FIG. with respect to the conductors of the groove 233a inserted in the positions of layer-2 by a level of the groove 1, as illustrated in FIG. 11 (b). In the example shown in FIG. 20, however, the conductors of the groove 233a inserted in the positions of the layer-2 are shifted to the right in FIG., With respect to the conductors of the groove 233a inserted in the positions of the layer-1, by a level of the groove 1. In this case, too, the conductors of the groove 233a that form each group of the conductor of the groove are arranged on four successive grooves, and the number of conductors of the groove 10 233a inserted in each groove is equal to that of the positional arrangement shown in FIG. 10. As a result, advantages similar to those of the positional arrangement shown in FIG. 10 are obtained. The concept on the basis of which the positional arrangements shown in FIGS. 10 and 20 are designed from the point of view below. FIGS. 15 7 to 10 indicate that the round windings U13, U14, U21 and U22 are inserted in the grooves as conductors of the layer 1 groove and conductors of the layer 2 groove. In other words, these round windings are inserted in the grooves having alternatively the position layer-1 and the position of layer-2. The positioning arrangement for the groove conductors has the positions of layer-1 and the positions of layer-2 can be defined independently of the positioning arrangement for the conductors of the groove having the positions of layer-3 and the positions of layer- 4. Certainly, a group of conductors of the groove to be arranged in the positions of layer-1 and the positions of layer-2 and a group of conductors of the groove to be arranged in positions of layer-3 and the positions of layer- 4 can be categorized as a subgroup of the groove conductor and the groove conductor groups 234 shown in FIGS. 10 and 20 can be related as a grouping of groove conductors made with two subgroups of the groove conductor. In the following description, the 30 groove conductor groups shown in FIG. 10 will be seen with reference numeral 234A and the conductor groups of the groove shown in FIG. 20 will be observed with reference numeral 234B.
FIG. 21 shows three examples of groove conductor groups that can be formed when the number of grooves per phase per NSPP pole is 2 and the number of layers (2 x NL) is 4. FIG. 21 (a) shows one of the conductor groups of the slot 234A in FIG. 10, FIG. 21 (b) shows one of the conductor groups of the slot 234B in FIG. 20, and FIG. 21 (c) shows a group of conductor in slot 234C.
The groove conductor group 234A shown in FIG. 21 (a) is made with two subgroups of the groove conductor 235a. Slot conductor subgroups 235a include two slots 233a conductors inserted in an odd-numbered layer and two slots 233a conductors inserted in the adjacent even-numbered layer. In this description, the odd-numbered layer will be referred to as a layer (2m - 1) and the even-numbered layer will be referred to as a 2m layer. It should be noted that m = 1, 2, ... NL. When there are four layers (2 x NL = 4), as in FIG. 15 21, m has a value of 1 or 2.
Slot conductor subgroups 235a are formed by displacing the conductors of groove 233a in layer 2m with respect to the conductors of groove 233a in layer (2m - 1) by a level of groove 1 along the direction of reverse rotation. Np in FIG. 21 indicates the level of the groove by which the conductors of the groove 233a are displaced, with Np = 1 indicating that the conductors of the groove are displaced by a level of the groove 1 along the direction in which the rotor rotates and Np = -1 , which indicates that the groove conductors are moved by one level of the groove 1 along the opposite direction from the direction in which the rotor rotates. In addition, the sub-group of the groove conductor 235a located still towards the outer circumference is displaced with respect to the sub-group of the groove conductor 235a located on the inner circumferential side by a level of the groove 1 along the reverse rotation direction ( Np = -1). It should be noted that the arrows on the solid line in FIG. 21 indicate the direction in which the groove conductors are displaced relative to the other two groove conductors within the same groove conductor subgroup, in which the dotted line arrows indicate the direction in which a groove conductor subgroup is displaced with respect to the other subgroup of the groove conductor.
The groove conductor group 234B shown in FIG. 21 (b), on the other hand, is formed with two different types of groove conductor subgroups 235a and 235b. The sub-group of the conductor of the groove 235b is formed by the displacement of the conductors of the groove 233a in the layer 2m with respect to the conductors of the groove 233a in the layer (2m -1) by a level of the groove 1 along the direction of rotation (Np = 1). In addition, the groove conductor subgroup 235a located still towards the outer circumference is displaced with respect to groove conductor subgroup 235b located on the inner circumferential side by a groove level 1 along the reverse rotation direction ( Np = -1). In other words, the center of the conductor subgroup of the groove 235a along the circumferential direction is offset with respect to the position of the center of the conductor subgroup of the groove 235b along the circumferential direction by a level of the groove 1 along the reverse rotation direction.
While the groove conductor group 234C shown in FIG. 21 (c) is similar to that shown in FIG. 21 (a) in which it is made with identical subgroups of the groove conductor 235a, the subgroups of the groove conductor 235a are arranged adopting a different positional arrangement 20 than in FIG. 21 (a). The groove conductor subgroup 235a located still towards the outer circumference in the groove conductor group 234C is displaced relative to the groove conductor subgroup 235a located on the inner circumferential side by a level of groove 1 along the direction of rotation of the groove. rotor (Np = 1). 25 While the conductors of the groove 233a in the groups of the conductor of the groove 234A to 234C shown in FIG. 21 are arranged with different positional dispositions, the groove conductor groups 234A to 234C invariably include the subgroups of the groove conductor NL made with groove conductors arranged in the layer (2m - 1) and groove conductors 30 arranged in the layer 2m, which they are moved relative to each other by a level of the groove 1 along the circumference of the stator center (along the direction of rotation of the rotor or along the direction of reverse rotation). In addition, the conductor subgroups of the NL groove in each of the groove conductor groups 234A to 234C are arranged with an offset from one another by a groove level 1 along the circumference of the stator center. In other words, the sub-group of the groove conductor located towards the outer circumference is displaced with respect to the sub-group of the groove conductor located on the inner circumferential side by a level of the groove 1 along the circumference of the stator center.
FIG, 22 shows examples of three different groups of the cons. 10 slot grooves that can be formed when the number of grooves per phase per NSPP pole is set to 2 and the number of layers NL is six, with FIG. 22 (a), FIG. 22 (b) and FIG. 22 (c) respectively showing a group of the groove conductor 2234A, a group of the groove conductor 2234B and a group of groove conductor 2234C. Since there are six layers (2 x NL 15 = 6), the groove conductor groups 2234A, 2234B and 2234C are all invariably made up of three groove conductor subgroups.The three groove conductor subgroups are a subgroup of the groove conductor slot 235a or a subgroup of the slot conductor 235b between the subgroups of the slot conductor shown in FIG. 21. 20 In the groove conductor group 2234A shown in FIG. 22 (a), a subgroup of the groove conductor 235a disposed immediately outward with respect to a subgroup of the groove conductor 235a disposed in the deepest position is displaced with respect to the deepest subgroup of the groove conductor 235a by one level of the groove 1 along the direction of 25 reverse rotation (Np = -1). The subgroup of the conductor of the groove 235a disposed further out is displaced with respect to the deeper subgroup of the conductor of the groove 235a by a level of the groove 2 (Np - -2). In other words, the extreme conductor subgroup of groove 235a is displaced with respect to the conductor subgroup of groove 235a located immediately 30 in and adjacent to the extreme conductor subgroup of groove 235a by a level of groove 1. The conductor group of slot 2234B shown in FIG. 22 (b) is made with two subgroups of the groove conductor 235a and a subgroup of the groove conductor 235b. The groove conductor subgroup 235b arranged outwardly close to the deeper groove conductor subgroup 235a is displaced with respect to the deeper groove conductor subgroup 235a by a groove level 1 along the reverse direction of rotation (Np = -1) and the conductor subgroup of groove 235a further outwardly is displaced with respect to the deeper conductor subgroup of groove 235a by a level of groove 2 (Np = -2). The groove conductor group 2234C shown in FIG. 22 (c) 10 is made with two subgroups of the groove conductor 235a and a subgroup of the groove conductor 235b. The subgroup of the groove conductor 235a disposed immediately next to the deepest subgroup of the groove conductor 235b is displaced with respect to the deepest subgroup of the groove conductor 235b by a level of the groove 1 along the 15 rotation direction (Np = 1) and the outermost conductor subgroup of groove 235a is displaced with respect to the deeper conductor subgroup of groove 235b by a level of groove 1 along the reverse rotation direction (Np = -1). The groove conductor groups 2234A, 2234B and 2234C have been described with reference to FIG. 22 as examples of the positional arrangements that can be adopted when the number of grooves per phase per NSPP pole is 2 and the number of NL layers is six, also invariably include subgroups of the NL groove conductor made with groove conductors arranged in the groove ( 2m - 1) and groove conductors arranged in layer 25m, which are displaced relative to each other by a level of groove 1 along the circumference of the stator center (along the direction of rotation of the rotor or along the direction reverse rotation). In addition, the conductor subgroups of the NL groove in each groove conductor group are arranged with an offset from each other 30 by a groove level 1 along the circumference of the stator center.
FIG. 23 presents examples of groove conductor groups that can be formed when the number of grooves per phase per pole
NSPP is 3 and the number of layers (2 x NL) is 4 (NL = 2). FIG. 22 (a) shows one of the conductor groups of the groove 1234 in FIG. 19. In FIG. 21 (a), the groove conductor group is observed as a groove conductor group 1234A. FIGS. 23 (b) and 23 (c) show other examples respectively observed as a group of the groove conductor 1234B and a group of the groove conductor 1234C. Since the number of grooves per phase per NSPP pole is 3, the groove conductor group 1234A, groove conductor group 1234B and groove conductor group 1234C invariably include three groove conductors 233a arranged in each layer without the the groove conductor group and the groove conductor groups 1234A, 1234B and 1234C are all created with two groove conductor subgroups corresponding to the four layers (2 x NL).
There are two different types of groove conductor subgroups, that is, groove conductor subgroups 1235a and 1235b. The conductors of the groove 233a in the layer 2m in a subgroup of the conductor of the groove 1235a are displaced with respect to the conductors of the groove 233a in the layer (2m - 1) by a level of the groove 1 along the reverse rotation direction (NL = -1 ). The conductors of the groove 233a in the layer 2m in a subgroup of the conductor of the groove 1235b are displaced with respect to the conductors of the groove 233a in the layer (2m - 1) by a level of the groove 1 along the direction of rotation (Np = 1).
The positional arrangements in which the groove conductor subgroups are defined as shown in FIG. 23 (a) to 23 (c) respectively correspond to the positional arrangements shown in FIGS. 21 (a) to 21 (c). Namely, the conductor subgroup of the groove 1235a located on the outer circumferential side is displaced with respect to the conductor subgroup of the groove 1235a located on the inner circumferential side by a level of the groove 1 along the reverse rotation direction (Np = -1) in the positional arrangement shown in FIG. 23 (a), the groove conductor subgroup 1235a located on the outer circumferential side is displaced relative to the groove conductor subgroup 1235b located on the inner circumferential side by a groove level 1 along the reverse rotation direction (Np = -1) in the positional arrangement shown in FIG. 23 (b) and the groove conductor subgroup 1235a located on the outer circumferential side is displaced relative to the groove conductor subgroup 1235a 5 located on the inner circumferential side by a groove level 1 along the rotor rotation direction (Np = 1) in the positional arrangement shown in FIG. 23 (c).
The various groups of the groove conductor that have been described with reference to FIG. 23 as examples of the positional arrangements that 10 can be adopted when the number of grooves per phase per NSPP pole is 3 and the number of layers (2 x NL) is 4, too, each invariably includes subgroups of the NL groove conductor made with groove conductors arranged in the layer (2m - 1) and groove conductors arranged in the layer 2m, which are displaced relative to each other by a level of the groove 1 along the circumference of the stator center (along the direction of rotation rotor or along the reverse rotation direction). In addition, the conductor subgroups of the NL groove are arranged with relative displacement by one level of the groove 1 along the circumference of the stator center. 20 In addition, the following alternative description applies to the structures adopted for the groove conductor groups shown in FIG. 21 (a), in FIG. 22 (a) and in FIG. 23 (a). Namely, the stator winding includes groups of the groove conductor each made with a group of groove conductors 233a corresponding to a single phase, which are arranged in successive grooves with groove conductors inserted in a given groove. having successive layer positions. Groove conductors assuming corresponding layer positions are placed on successive grooves, the number being represented by NSPP. In each group of the groove conductor, the groove conductors in the 2nd layer (that is, in 30 an even-numbered layer), counting on the inner circumferential side of the grooves, are arranged with an offset from the groove conductors in the first layer by a m-level of the groove along the direction of reverse rotation, that is, a direction that runs along the circumference of the center of the stator and the groove conductors in the (2m - 1) layer (ie, a layer with odd number) except for the first layer, they are arranged with a displacement with respect to the groove conductors in the first layer by a groove level (m - 1) along the reverse rotation direction. NSPP shows the number of grooves per phase per pole, the number of layers is expressed as 2 x NL and m = 1,2, ..., NL.
As described above, a reduction in the extent of the torque ripple and a reduction in noise are obtained through the modalities that adopt special winding arrangements in stator windings with wave winding pattern to reduce the highest harmonic component in the interconnecting magnetic flux . While it is known in the related art that the torque ripple can be reduced by twisting the rotor, the specific component that can be reduced is determined in correspondence to the skewed angle. This means that the sixth-order torque ripple component and the twelfth-order torque ripple component, for example, cannot be reduced at the same time simply by twisting the rotor. In the embodiment shown in FIG. 10, the sixth order torque ripple component can be greatly reduced although the twelfth order torque ripple component cannot be reduced, as indicated in FIG. 15. Certainly, the modality can be adopted in conjunction with a skewed rotor to reduce the twelfth-order torque ripple component in order to further reduce the torque ripple and, finally, provide a rotating electrical machine that takes on reduced noise .
In addition, the present invention can be adopted to achieve noise reduction in a vehicle using the rotating electric machine described above, a battery that provides DC power and a conversion device that converts the battery's DC power into AC power and it supplies AC power to the rotating electrical machine, characterized in that the torque generated in the rotating electrical machine is used as the driving force, like the vehicle described with reference to FIGS. 1 and 2.
While the invention was described with reference to an example in which it is adopted in a magnet motor used in vehicle applications, the higher harmonic component included in the waveform of the magnetic force in the stator 230 can also be reduced by adopting the present invention. Certainly, the present invention can be adopted in several types of motors with the magnets arranged in the rotor 250, such as induction motors and synchronous reluctance motors. In addition, the present invention can be adopted in engines used in various applications other than vehicular applications. In addition, the present invention can be adopted in various other types of rotating electrical machines, such as generators, instead of engines. As long as the characterizing functions of the present invention are not co-committed, the present invention is not limited in any way to the particularities of the modalities described above. 15 The following description of the priority application is incorporated by reference: Japanese Patent Application No. 2010-163100, filed on July 20, 2010.

权利要求:
Claims (7)
[0001]
1. Electric rotating machine (200, 202) comprising: a stator center (230) having a plurality of grooves (237) formed therein; characterized by the fact that it also comprises: a stator winding (238) that assumes a plurality of phases (U, V, W), which includes a plurality of round windings (U11-U24, V11-V24, W11-W24) with a wave winding pattern, each having groove conductors (233a) each inserted into one of the grooves (237) in the center of the stator (230) to form one of a plurality of layers and transverse conductors each connecting the same lateral ends of the groove conductors (237) inserted in different grooves (237) to form an end of the coil (241); and a rotor (250) rotatably supported with an air space to be allowed to rotate with respect to the center of the stator (230), in which: the transverse conductors (233b) connect the groove conductors (233a) to travel over the grooves ( 237) with the groove level (237) Np defined in N + 1 at the ends of the coil (241) on one side and travels over the grooves (237) with the groove level (237) Np defined at N - 1 at the ends the coil (241) on the other side, with N representing a number of slots (237) per pole; the stator winding (238) includes a plurality of groups of the stator windings (U1, U2), in which there is no phase difference that manifests between the voltages induced in each of the groups of stator windings (U1, U2) of same phase, where each of the groups of stator windings (U1, U2) includes a plurality of round windings (U11-U24, V11-V24, W11-W24) of the same phase, and the stator winding (238) includes a plurality of groove conductor groups (234), each having a plurality of groove conductors (233a) corresponding to a single phase (U, V, W); the plurality of groove conductors (233a) in each groove conductor group (234) is inserted into a predetermined number of successive grooves Ns (237) forming a continuous gap along a circumference of the stator core (230) so that the groove conductors (233a) in the groove conductor group (234) take successive groove positions (237) and successive layer positions; and the predetermined number Ns is defined so that Ns = NSPP + NL when NSPP represents a number of grooves (237) per phase per pole and NL represents a number that is equal to a number of layers (L1-L4) divided by 2 .
[0002]
2. Electric rotary machine (200, 202) according to claim 1, characterized by the fact that: the groove conductor groups (234) each include the subgroup groove conductor NL (235a), each formed by arranging the groove conductors (233a) in one (2m - 1) layer and the groove conductors (233a) in a 2ma layer with a relative offset to each other along the circumference of the stator center (230) by one level of slot 1; the conductor subgroups of the NL groove (235a) are arranged with an offset of the level of the groove 1 with respect to each other along the circumference of the center of the stator (230); and m = 1,2, ..., NL.
[0003]
3. Electric rotary machine (200, 202) according to claim 1, characterized by the fact that: the stator winding (238) includes a plurality of groove conductor groups (234), each having a plurality of groove conductors (233a) corresponding to a single phase, formed by arranging the groove conductors to form a specific layer over a predetermined NSPP number of successive grooves (237); in each group of the groove conductor (234), groove conductors (233a) in a second layer, counting from an inner circumferential side of the grooves (237), are arranged with a displacement relative to the groove conductors (233a ) in a first layer by a groove m-level in a direction that runs along a circumference of the stator center (230) and groove conductors (233a) in a (2m - 1) layer, excluding the first layer , are arranged with a displacement relative to the groove conductors (233a) in the first layer by one (m - 1) groove level in one direction; and m = 1,2, ..., NL.
[0004]
4. Electric rotating machine (200, 202), according to claim 1, characterized by the fact that the round windings (U11-U24, V11-V24, W11-W24) are each formed by the connection of a plurality of segment conductors.
[0005]
5. Electric rotating machine (200, 202), according to claim 1, characterized by the fact that the groove conductors (233a) are made of steel cable.
[0006]
6. Electric rotating machine (200, 202), according to claim 1, characterized by the fact that the stator winding (238) includes a plurality of Y connections and there is no phase difference that manifests between the voltages induced in the windings of the same phase in the plurality of Y connections.
[0007]
7. Vehicle (100), comprising: an electric rotating machine (200, 202) as defined in claim 1; characterized by the fact that it still comprises: a battery (180) that provides DC power; and a conversion device (600) that converts the resulting DC power from the battery (1800 to AC power and supplies AC power to the rotating electrical machine (200, 202), where: the torque generated in the rotating electrical machine (200, 202) is used as a driving force to drive the vehicle (100).

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法律状态:
2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-07-09| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|

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2020-02-04| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|

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2020-05-26| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2020-11-10| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 20/07/2011, OBSERVADAS AS CONDICOES LEGAIS. |

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2022-01-18| B25D| Requested change of name of applicant approved|Owner name: HITACHI ASTEMO, LTD. (JP) |

优先权:

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申请号 | 申请日 | 专利标题

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JP2010-163100|2010-07-20|

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JP2010163100A|JP5587693B2|2010-07-20|2010-07-20|Rotating electric machine and vehicle equipped with the rotating electric machine|

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PCT/JP2011/066444|WO2012011493A1|2010-07-20|2011-07-20|Rotary electrical machine and vehicle provided with rotary electrical machine|

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