• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method for supplying the stator windings (11) of a rotating field electric machine (10) operating as a motor whose stator windings (11) receive predefined phase currents (Ia-Ie) by the application of a vector process. The polarization currents determined by the vector method are applied at least partially to the phase currents (Ia-Ie) in order not to have a torque effect in the rotating field machine (10).
    公开号:FR3016489A1
    申请号:FR1550140
    申请日:2015-01-08
    公开日:2015-07-17
    发明作者:Manuel Hoellmann
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    [0001] Field of the Invention The present invention relates to a method for supplying the stator windings of a rotating field electric machine operating as a motor whose stator windings receive phase currents, predefined by the application of a vector process. STATE OF THE ART Generators are known for converting mechanical energy into electrical energy in a motor vehicle. Generally, polar claw generators are used. According to the state of the art, these generators operate with electrical excitation. As the polar claw generators output a generally three-phase rotating current, it is necessary to straighten to supply the usual dc voltage networks equipping the motor vehicles. According to the state of the art, the rectifiers are made on the basis of semiconductor diodes. Generators also used for driving a vehicle (that is to say generators that also function as a motor) are known in the field of hybrid vehicles.
    [0002] The objective is to assist the engine at low speed when it does not yet provide its maximum torque (amplification mode, compensation of the turbo hole). In addition, energy can also be recovered by active electric braking (dynamic braking) by recovering the kinetic energy of the vehicle to transform it into electrical energy supplying the on-board network. For this purpose permanent magnet excitation synchronous machines are generally used which operate at high voltages typically at voltages above 100V. This results in a relatively complex system structure combined with considerable modifications to be made to the transmission line as well as relatively complicated means of protection due to the high voltages. Rotating field electric machines are also known. These machines can be made as three-phase electrical machines without a ground conductor. The phase currents used in motor mode of corresponding rotating field machines or their stator windings can be predefined in known manner using vector control methods (also called "vector control"). For this, we use the Clarke transformation and / or the Park transformation (that is to say each time the inverse transformation). For three-phase rotating field machines, the vectors a and 13 of the Clarke transformation or the vectors d and q of the Park transform of the three phase currents are unambiguously defined because only two phase currents can be determined freely. the third phase current resulting from the sum of the two other phase currents. Hereinafter expressions such as "rotating field electric machine", "rotating field electric drive" and "electric motor" will be used synonymously. In each case it is an electrical machine operating at least periodically as a motor, possibly as a generator, for example in dynamic mode (recovery) and whose stator windings in motor mode are switched in a pattern of control by a rectifier with currents (phase currents) so as to develop a rotating electric field. The "stator windings" thus form one or more electric coil devices, for example with star or delta mounting. In the remainder of the description, the expression that supplies the "phases" or applies currents means that a corresponding current flows through the respective stator winding. These indications are synonymous. To protect the electric machine, especially its stator windings against excessive temperatures, it is desirable to know their actual temperature. Known methods, not using a temperature sensor, use the determination of the resistance of the stator windings. From the ohmic resistance thus obtained, the temperature of the winding can be determined. But the accuracy of the measurement depends on the tolerances of the measurement, the precision of the motor model used for the calculation and especially on the part of the ohmic resistance in the total reactive resistance of the machine.
    [0003] OBJECT OF THE INVENTION The object of the present invention is to develop better possibilities for providing corresponding quantities for the most accurate determination of temperature without the use of a temperature sensor. DESCRIPTION AND ADVANTAGES OF THE INVENTION For this purpose, the subject of the invention is a method for supplying the stator windings of a rotating field electric machine functioning as a motor whose stator windings lo receive predefined phase currents. by the application of a vector process, this method being characterized in that polarization currents determined by the vector process are applied at least partially to the phase current so as not to have a torque effect in the rotating field machine. The core of the invention is the targeted use of the degrees of freedom of a system during the supply of (n) phases or (n) phase windings (hereinafter also referred to as "n-phase system") of an electric rotating field machine and this to adjust the current component in the different phases that have no effect on the field developing the torque. This makes it possible to better determine the respective ohmic resistance (temperature dependent) in the phases or the phase windings. The method according to the invention is for example implemented using a vector control method for controlling the rotating field machine. The invention offers just as many advantages through vector control or other methods. These methods will be grouped together hereinafter as "vector-based process". The following specific reference to a vector control method relies essentially on readability patterns. The invention will be described with the aid of an example of a five-phase rotating field electric machine. The Clarke transformation known for a three-phase system will be extended according to the invention to a five-phase system to be able to describe it completely. This allows accurate measurement of the stator temperature and various accessory functions. The invention is however suitable as described below for all rotating field machines having a sufficient number of degrees of freedom to adjust the phase currents and allow the current components to be adjusted in the phases which have no effect. on the field developing the couple.
    [0004] The additional functions mentioned include, in particular, the supply of the stator windings without generally generating a torque (for example for self-tests and / or calibration functions which can in a targeted manner heat the stator windings at a standstill) and the harmonic utilization of phase currents in the case of the five-phase system. The Clarke transformations used here (see equation 3 below) do not show all the harmonics. The present invention relates to a method of supplying the stator windings of a rotating field electric machine functioning as a motor, the stator windings receiving the respective phase currents which are predefined with the aid of a vector process. According to the invention, the phase currents are combined at least in part with bias currents which are determined by the vector process to avoid producing torque in the rotating field machine. If the currents or components of the currents used to power the stator windings generate a torque acting on the rotor of the rotating field machine, the expression "torque effect" will be used. As indicated, the stator windings are usually switched in a control pattern developing a rotating electric field. This one thus presents a torque effect. The invention, on the other hand, makes use of only currents or (additional) current components which, taken alone, do not generate any force or generate any significant force exerted on the rotor, that is to say ie do not produce torque or only negligible torque. The condition for the application of the method of the invention is, as already indicated, the existence of a certain number of degrees of freedom for supplying the stator windings in addition to the degrees of freedom in three-phase, field-operated machines. rotating, regular without mass driver. As described below and with reference to the figures, such a three-phase rotary field machine has two degrees of freedom. According to Kirchhoff's law (also called the law of the node of the intensities) the sum of the currents of the phases of such a rotating field machine must be null. For the supply of three-phase rotating field machines or their stator windings, the two degrees of freedom existing for the power supply that couple the torque are thus "used". In rotating field machines having a larger number of phases or three-phase machines with rotating field with a grounded conductor, on the other hand, at least one other degree of freedom is used to apply the phase currents to the ground. part direct current (bias current) which itself does not generate torque. The currents or polarization intensities applied to the phase currents according to the present description are effectively intensities added or subtracted to increase or decrease the phase currents. These are, for example, DC currents or DC components as will be explained next, i.e., constant bias currents. These currents are determined using the vector-based method. Solicitation with bias currents consists of other terms for example to combine positive or negative DC currents. In the context of the present description, a bias current ("bias current") refers to variable currents. The currents (intensities) without torque effect are not necessarily absolutely constant but can also vary (it is enough that it is low frequency). A vector process may involve variable values for y or δ. As described later, at high frequencies the influence of ohmic resistance decreases so that this resistance can no longer serve to determine the temperature. If the frequency of the current component without torque effect is, on the other hand, sufficiently small, the temperature can be determined. If phase currents are available (as constant currents or having an intensity equal to zero), for example, constant currents of constant polarization will produce a constant current. If all the stator windings are traversed by constant currents (constant current), this does not develop a torque by the rotating field machine, but the stator windings heat up.
    [0005] This can be used, for example, for calibration functions and / or for stator windings corresponding to a test with a predefined maximum current. If, however, as is typically the case with a field machine running in motor mode, the phase currents have a predefined intensity whose predefined amplitude and predefined frequency oscillate around a given value. average (without the application according to the invention polarization currents, such intensities oscillate around the zero line) because of the application according to the invention of polarization currents is on the other hand an increase or decrease of the baseline of sinusoidal phase current. As described next, the bias currents are predefined by a transformation prescription which is a transformation rule deduced from the Clarke transformation. By this transformation, the intensity vectors which are independent of the torque vectors and which themselves do not have a torque effect, are converted into corresponding intensity values for determining the degrees of offset. In particular, the method according to the invention is particularly suitable for supplying the stator windings of a rotating field electric machine whose feed has at least four degrees of freedom as indicated above. The invention is suitable for synchronous or asynchronous rotating field machines. In particular, the present invention also relates to a method for determining the temperature of the stator windings of a rotating field machine by determining the ohmic resistance of the stator windings. For this, it is fed at least while the ohmic resistance of the stator windings is determined according to this method as described above. The power supply can also be done in particular before determining the ohmic resistance for the stator windings to heat reproducibly. A computing unit according to the invention, for example a control apparatus of an electric rotating field machine, is especially designed in programming technique for applying the method of the invention. The implementation of the method in the form of a program is an advantageous solution because it results in a particularly low cost, especially if the control device is also used for other functions and thus exists. anyway. Suitable data carriers for the computer program include floppy disks, hard disks, flash memories, EEPROMs, CD-ROMs, DVDs and others. The program can also be downloaded via a computer network (internet, intranet or other). Drawings The present invention will be described in more detail below with the aid of exemplary embodiments shown in the accompanying drawings in which: FIG. 1 is a diagram of a five-phase rotating field machine applying the method Of the invention, FIG. 2 schematically illustrates the directions of action of the phase currents of a rotating five-phase machine, FIGS. 2A-2C illustrate the difficulties of the inverse transformation of the currents according to a vector representation for the five phases, FIGS. 3A and 3B show phase currents and vector representation intensities without the application of the method of the invention, FIGS. 4A and 4B show phase currents and intensities in vector representation in FIG. case of the application of the method of the invention. DESCRIPTION OF EMBODIMENTS In the case of the present invention, use is made, for example, of a rotating five-phase synchronous electric field machine. For the description, however, reference will first be made to a three-phase synchronous rotating field electric machine with corresponding three-phase stator windings. In the case of a three-phase machine with a three-phase rotating field, the generally known node-of-intensity rule states that the sum of the phase currents (hereinafter referenced as Ia, Ib and Ic) be equal to zero. Among the currents of phase Ia, Ib, Ic one can freely choose two currents (two intensities) whereas the third current is given by the law of the nodes of the intensities. In other words, we can choose the phase currents with two degrees of freedom.
    [0006] The transformation of Clark, also called a transformation a, p makes it possible to transfer three-phase quantities which we have in the case of three-phase machines with a rotating field on the axes a, b and c (or at choice, designated U, V). and W) in a simple two-axis coordinate system, that is with the axes a and p. The transformation of Clarke with the transformation d, q is one of the mathematical bases of vector control of rotating machines and describes one of the many possible representations with a vector of space. The orthogonal coordinate system at the base of the Clarke transformation is that of the stator at rest and is copied in the complex plane with the real part a and the imaginary part p. The three stator windings of a rotating field three-phase machine are shifted each time by an angle of 120 °; by definition, the axis a (or axis U) corresponds to the real axis a. The Clarke transformation transfers the three phase currents Ia, Ib and Ic into two currents of the same value in the coordinate system a, 13. The Clarke transformation is given by the following formula: Ip 2 cos (0) cos sin (0) sin 27.c 9a lb (1) 0 3 1 3 (47.c IC 2 27r cos 3 3 1 sin 2 3 1 2 10 Similarly, for the inverse transformation of Clarke we have the following formula: Ib cos (0) - - - sin (0) Ip IC (27.c (27.c cos sin 3 3 ( 47.c (LW cos sin 3) 3 (2) In the case of a five-phase rotating field machine, according to the law of the node of the intensities, there are four phase currents which can be selected and the fifth phase current derives from the rule that the sum of the phase currents is equal to zero, in this case four degrees of freedom, the phase currents of the five-phase rotating-field machine are called after the ... The directions of action of the phase currents are similar to those of the three-phase rotating-field machine, but the angle between the neighboring phases is in this case equal to 72 ° (2H15). figure 2 explicit say them In the case of a five-phase rotating field electric machine according to a schematic representation in an axis diagram a and p. Figure 1 shows a five-phase rotating field machine 10 with the five stator windings 11 connected in a star-shaped arrangement. To supply the stator windings 11 there are five electrical connections AE connected to alternating current sources 12, for example the outputs of an active inverter with ten pulses, controlled by a control installation 13. The voltages between the sources alternating current 12 and the terminal 0, for example the ground bear the references UAO ... UEO; the phase currents are referred to as la-Ie. The stator field generated by the phase currents can also be represented in the two-axis coordinate system al3. For this, we use a Clarke transformation, adapted to five phases: (27r (47r (67r (87r - la lb Id l cos (0) cos - cos - cos - cos - e 5 / 5 / 5 / 5 / sin (0) s_n (2- if n (4- if n (6- if n (8- 5 ..) .. 5) .. 5 5) (3) The inverse transformation of the intensities la and Ip in a vectorial representation to return to the phase currents la-Ie can no longer be done univocally because the phase currents for the four degrees of freedom present are oversized.
    [0007] As shown in FIGS. 2A-2C, the same resultant vector can be represented by several combinations of phase currents. FIGS. 2A-2C explain four possibilities of different combinations for each time a resulting vector, equivalent to a = 2.5 and 13 = 0 (this vector itself is not represented for the sake of readability) in the system The vectors Ia of the different phases are represented from the origin of the coordinate system. The vectors Ib'-Ie 'represented in dashed lines are the vectors shifted in parallel for the vectorial addition. Ia-Ie vectors are linearly interdependent.
    [0008] As in a three-phase system, it is desirable to have a sinusoidal shape curve for the phase currents. Phase-to-phase power conversion is then performed by sinusoidal tracings as a function of the rotor angle. By predefining the sinusoidal curve and an identical amplitude of the phase currents, it is nevertheless possible to carry out a Clarke transformation, inverse, univocal, as shown in the equation presented hereinafter. It corresponds to Figure 2A. cos (0) sin (0) (27r (27r cos - sin - 5) 5) cos (-47r sin (L7r - 5) 5) cos (-67 5m- - 5) 5) (87r (87r cos - 5) Two of the four degrees of freedom are described by the components a, 13 which form the pair. For the two degrees of freedom remaining, according to the invention, the Clarke transformation is widened to have no effect on the vectors a, (phase currents The two additional degrees of freedom are hereinafter referred to as and O.
    [0009] This part is represented by the following transformation: I, I, 2 cos (0) sin (0) cos sin (47r cos (87r cos (127r sin cos I (5) 5 - sin - sin - sin (167r a sin sin lb 1C Id 1 _ e _ 5) 5) / 5) 5) (47r - / / - - 5) 5) 5) 5) The inverse transformation is as follows: cos (0) sin (0) 'cos -47r 47r sin - - 5) 5) 87r sin in - 5) 5 '127r cos sin' 127r - 5) 5 '16fr cos sin' 167r - 5v (4) IIIII = (6) In combination, the result is the broadened Clarke transformation: (27r (47r (67r (87 OCS GCS GCS GCS 5, 5, 5, 5,., (27r., (49r., ( W 8.7r 2 ---- 5, ---- 5, ---- 5, 5, (47 (8.7r (127r (IW ccs cOE, cOE, ccs 5, 5, 5i 5i 47r, 87.c 127r 167 5, 5, 5, 5, or the Clarke transformation, inverse, widened: 20 ccs (0) sin (o) ccs (0) sin (o) (7) Id the cos (0) sin (0) 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 r 47r - 5 5 cos sin (r 87r - 5 (127r sin (12r - 5 The values Iy and Io have no influence on Ip and Ip and thus they have no influence on the torque. The transformation from the quantities y and 6 with the inverse transformation according to equation 6 for the phase quantities and the following Clarke transformation in coordinate system a, 13 show the independence of the variables between them (this does not is not shown here for the sake of clarity). As will be described hereinafter, taking into account the principles described above, there will be a better measure of resistance needed to determine the temperature during operation of the rotating field machine.
    [0010] We will first describe how, according to the state of the art, we can make a calculation of resistance with exclusively the coordinates a, 13 and the coordinates d, q which are deduced to make a computation of resistance. The system d, q and the Park transformation used then are information known in the literature that does not require a detailed description: the formulas are the following: ud = Rs-id-p-oi-Lq-iq (9) uq In these formulas, ud and uq are the stator voltages in the coordinate system d, q; id and iq are the stator currents in coordinates d, q; wR is the sequence of the rotor flows; Rs represents the stator resistance and Ld and Lq represent the length of the pipe and the transverse inductance. As equations 9 show, the voltage / current ratio depends on both the stator resistance and also the inductances and the induced voltage. The higher the rotation speed, the lower the influence of ohmic resistance. The rotating field electric machine, however, operates primarily at high rotational speeds. This makes it difficult to calculate the resistance to determine the temperature. The relationship between temperature and resistance, known from the literature, is given by the following expression: R (T) = R (T0) (1+ a To - (I '-T)) (10) Now, for this the invention offers a significant improvement: For the field-oriented operation, the intensities la and Ip are regulated and controlled in a known manner. The values for Iy and I0 are independent as indicated above and can be adjusted in any way within the operating limits. It is thus possible to adjust in parallel an additional current vector.
    [0011] During the stationary steady-state mode, the vector a, 13 rotates at the frequency of the electrical rotation angle of the rotating field machine for a constant vector length. Thus, the circular frequency of vector a, 13 is related to the rotational speed of the rotating field machine. The additional vector y, δ makes it possible to apply to the phases a superimposed continuous voltage. There is thus a continuous superimposed current. The DC vector y, δ does not generate a torque triplet. In other words, in motor mode, a first current vector (vector a, () is predefined according to a vector control method for applying the currents to the stator windings which generate a torque in the rotating field machine. A second current vector (vector y, δ) is further predefined to apply currents (bias currents) to the stator windings, currents that do not generate torque in the rotating field machine. 4A and 4B show the respective phase currents (FIG. 3A, 4A) and the rotating vectors a, 13 (FIGS. 3B and 4B) with the phase angle cp in rad. In the representation of FIG. 3B, the vector y, Ô is 0. Figure 4B shows this vector a, 13 combined with the continuous component y, Ô (polarization current), but the torque thus generated is identical because the component y, Ô does not generate a torque. resistance according to R = U / I can be determined the temperature of the stator winding from the resistor and with the temperature coefficient according to equation 10. The advantage with regard to the determination of the temperature according to the state of the technical, is that on the one hand, it is not necessary to calculate the inductance and secondly, it is not necessary to have a machine model very accurate for the inductance in the system to calculate. This makes it possible to determine the temperature much more precisely than with the current processes without a difference in torque. If desired, the phase currents in the rotating field machine can also be adjusted without generating any torque. For this, we exclusively use the vector y, 8 (without vector a, () .The applications for this purpose are, for example, a regular heating of all the phases of the rotating field machine and / or the self-test of the phase currents. up to the maximum current Since the phase currents in coordinate system a, 13 are not completely represented, in the case of an exclusive conversion or feedback transformation according to equations 5 or 6 (ie that is to say for a regular transformation of Clarke using the coordinate system a, () we do not show all the harmonics, they are the harmonics which correspond to an integer multiple of the fundamental frequency of the phase currents. The following table shows which system the harmonics are in. Multiple of the fundamental frequency 1 2 3 4 5 6 7 8 9 Represented in la, 13 y, 6 y, 6 G, I3 _ G, I3 y, 6 y, 6 la , 13 The fifth harmonic can not occur because it does not respec you do not rule the sum of the five phase currents. According to the invention, it is possible to correct or compensate in the respective system (a, (or y, 6), which is not possible according to the state of the art.It should be noted that in the context of the present invention Alternate transformation rules can also be used: Examples are given by the following equations: a Ib Id e cos (0) cos sin (0) sin COS (127r COS COS (247r sin 5) (127r sin sin 5 ) Yy 1 5 5) 247r 5) _ cos (0) cos ro 67c 7c (12) cosr 0 127c cosr 18 cos cos 247c 5, 5, 5, 5, - sin (0) - sin (0 67 -sin 0-127c sin (0 187 sin (0 247c 5, 5 5, 5 The invention is suitable for five-phase rotating field machines, but in principle also for other rotating field machines having a number of degrees of The invention can also be applied to rotating field machines having two stator winding devices for the purpose of controlling the field of view. r a rotor, for example six stator windings divided into two groups each of three times stator windings. In the devices mentioned above, for example in each group, the stator windings will be shifted by 120 ° and the two stator winding groups are themselves shifted by 30 °. These angles are only given as examples. These are two three-phase winding devices configured in a star configuration (hereinafter referred to as "star"). The star configuration can also be a triangle mount or a mixed mount with each triangle and star. The angular offset of the windings is in this case an electric angle of 30 ° but can also have a different angle as indicated. The angular arrangements are, for example made with an electric angle shift of 30 °. This results for the two separate star arrangements, each time a distinct Clarke transformation, corrected angularly: 2 al / 3 3 ABC (13) 2 3 cos sin a2 P2 6 - 6) (5.7r (1.7r cos - 3) (5.7r sin (1.7r 3) (1 1, z `cos - 6) 6) (7.7r (11 sin 7r - 3) (7.7r) _ DEF cos (7c) cos sin (7r) To have a zero torque, the condition is that a and 13 are zero globally: 0 = 0 a2 = _ _P2 ages Pges = ai + a2 P2 I1 ai _Pi_ ( 14) A three-phase machine has two degrees of freedom for the choice of phase currents.In the evoked double-star configuration, there are four degrees of freedom, which makes it possible to apply the method of the invention. torque-free current vector to such a rotating field machine, it is necessary that the vectors a, 13 resulting from the different stars are oriented with the same amplitude in opposite directions.This makes it possible to apply a direct current which There is no torque effect, for example to measure the stator temperature or other possibilities using additional degrees of freedom. The angular position of the coordinates a, 13 can be freely chosen and can also correspond to another position. It is important to be able to compare the vectors resulting from the different drives25.
    权利要求:
    Claims (4)
    [0001]
    CLAIMS1 °) A method for supplying the stator windings (11) of a rotating field electric machine (10) functioning as a motor whose stator windings (11) receive phase currents (Ia-Ie) predefined by the application of a vector process, characterized in that polarization currents determined by the vector process are applied at least partially to the phase currents (Ia-Ie) in order not to have a torque effect in the field machine rotating (10).
    [0002]
    Method according to Claim 1, characterized in that the phase currents (Ia-Ie) are predefined by the vector method to oscillate around an average value with a phase current amplitude and a current frequency. the phase current amplitude and the phase current frequency being determined from the fundamental position of the requested rotational speed and / or the torque demanded from the rotating field machine (10) and the average values. correspond to the polarization currents.
    [0003]
    Method according to Claim 1 or 2, characterized in that the polarization currents are predefined on the basis of a transformation rule by which the second current vectors (y) are converted into an intensity value. , O) which are independent of the first current vectors (a, () having a torque effect.
    [0004]
    4) Method according to claim 1, characterized in that it is applied to the supply of the stator windings (11) of a rotating field machine (10) having at least four degrees of freedom for its supply. 355 °) Method according to claim 1, characterized in that it is applied to the supply of a rotating field machine (10) produced as a synchronous machine or asynchronous machine. Method according to Claim 1, characterized in that it is applied to the supply of a rotating field machine (10) with six stator windings divided into two groups of three stator windings each time and in each In the group, the stator windings are shifted relative to each other and the stator windings of the two groups are also shifted relative to one another. 7) Method for determining the temperature of the stator windings (11) of a rotating field machine (10) functioning as a motor according to which the ohmic resistance of the stator windings (11) is determined, characterized in that the stator windings (11) are fed according to the method of any one of claims 1 to 6 at least during the determination of the ohmic resistance of the stator windings (11). Method according to Claim 7, characterized in that the stator windings (11) are fed for a predetermined period of time according to the method of any one of Claims 1 to 6, before the ohmic resistance of the windings of the windings is determined. stator (11) for heating the stator windings (11). 9 °) calculation unit, especially control installation (13) of a rotating field electric machine (10) operating as a motor applying the method according to any one of claims 1 to 8, for supplying the stator windings (11). ) of the rotating field electric machine (10) functioning as a motor whose stator windings (11) receive predefined phase currents (Ia-Ie) by the application of a vector process, of applying at least one partially, at the phase current (Ia-Ie), polarization currents determined by the vector process to not have a torque effect in the rotating field machine (10). 10) Computer program product for a computing unit for applying the method according to any one of claims 1 to 8, in a computing unit according to claim 9, and the memory medium readable by a machine carrying the computer program. 15
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    引用文献:
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    法律状态:
    2016-01-21| PLFP| Fee payment|Year of fee payment: 2 |
    2017-01-24| PLFP| Fee payment|Year of fee payment: 3 |
    2018-01-12| PLSC| Publication of the preliminary search report|Effective date: 20180112 |
    2018-01-24| PLFP| Fee payment|Year of fee payment: 4 |
    2018-07-06| TQ| Partial transmission of property|Owner name: ROBERT BOSCH GMBH, DE Effective date: 20180601 Owner name: SEG AUTOMOTIVE GERMANY GMBH, DE Effective date: 20180601 |
    2020-01-20| PLFP| Fee payment|Year of fee payment: 6 |
    2021-01-19| PLFP| Fee payment|Year of fee payment: 7 |
    2022-01-20| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014200337.7A|DE102014200337A1|2014-01-10|2014-01-10|Energizing and measuring the temperature of stator windings of an at least motor-operated electric induction machine|
    DE102014200337.7|2014-01-10|
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