巴西专利BR112013020664B1 electric motor

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专利摘要:
ELECTRIC MOTOR. In one embodiment, the present invention relates to an electric motor. A first support cap is attached to the first side of the stator core in the axial direction and is attached to the first bearing housing. A second support cover is attached to the second side of the rotor core and is attached to the second bearing housing. The rotor includes a rotationally supported shaft and a fixed rotor core. The rotor core being turned inside the stator core. A fan is attached to the shaft between the rotor core and the first housing. A duct, formed between the first housing and the first support cover, is configured to conduct open air from a door to a part of the first support cover. A rotation detection circuit includes a detected part attached to the fan, and being disposed within the duct. A sensor operable to detect the part is installed in the duct, against the detected part.
公开号:BR112013020664B1
申请号:R112013020664-0
申请日:2012-01-26
公开日:2020-10-13
发明作者:Takashi Nagayama；Toshiaki Yamada
申请人:Kabushiki Kaisha Toshiba；
IPC主号:

专利说明:

Technical Field
[0001] The modalities described in this one refer to an engine for moving a railway vehicle. Background Technique
[0002] Generally, in a railway vehicle (hereinafter, simply vehicle), a main motor (hereinafter, simply electric motor) is installed in a bogie located under the chassis. The torque of this electric motor is transmitted to a wheel via a crown / pinion gear to move the vehicle.
[0003] The length of the maintenance cycle, that is, the need for an electric motor that has longer periods between maintenance, is increased. To satisfy this need, the development of a fully encapsulated motor is desirable.
[0004] The structure of the fully encapsulated motor will be explained. The inside of the circumference of a cylindrical structure is provided with a stator iron core in the fully encapsulated motor. The support and the housing, comprising a sealing box, are affixed to both ends of the housing. The bearings are provided in these supports and housing respectively.
[0005] A rotor shaft, which extends through the sealing box at both ends, is supported by bearings, allowing free rotation. A rotor iron core is attached to the central part of the rotor shaft and located within the stator iron core. A fan is attached to the rotor shaft inside the sealing box. The labyrinth seal part is formed between the peripheral part of the fan and a support.
[0006] An inspiratory door is formed in the perimeter of the bearing of a support, and open air is sucked into the central section of the ventilator from an inspiratory door and discharged out via a support ventilation duct.
[0007] For an electric motor composed in this way, open air does not circulate inside the device, so the inside of the device is not contaminated with dust. Therefore, the need to dismantle the device to clean the inside of the engine is eliminated or reduced.
[0008] The electric motor includes a detection part that rotates together with the rotor, and a rotation sensor that detects the detection part, to perform rotation control and vehicle braking control. These detection and speed sensor parts are outside the sealing box and are covered with a cover, to intercept the open air inlet.
[0009] Because the electric motor for a rail car is installed in a reduced space in the bogie, there is usually a space constraint. Therefore, when the speed sensor and the detection part are affixed to the outside of the seal box (including speed sensor and covered detection parts, as described), the size of the electric motor's geometric axis (including iron core of stator and rotor iron core) is small. When the size of the electric motor's geometry axis is small, the output power of the electric motor consequently decreases. Summary of the Invention Technical problem
[00010] An electric motor will be described in this one. The motor has a stator core. The motor has a first support fixed to the first side of the stator core in the axial direction. The first support has a first bearing housing, which houses a bearing. The motor has a second support attached to the second side of the stator core in the axial direction. The second support has a second bearing housing that houses a bearing. The motor has a rotor having a rotor shaft that is rotatably supported by the bearings and the rotor core is attached to the rotor shaft. The rotor core is turned towards the inside of the stator core. A fan is attached to the rotor shaft between the rotor core and the first bearing housing. A ventilation duct is formed between the first bearing housing and the first support, the ventilation duct being configured to suck open air from an inspiratory door to a peripheral part of the first support. The engine also has a speed detection circuit having a detected part and a sensor. The detected part is fixed to the fan, and located inside the ventilation duct. The sensor is operable to detect the detected part. The sensor is installed in the ventilation duct and positioned against the detected part.
[00011] An electric motor, according to another modality, will be described. The motor has a stator core. The motor has a first support, which is fixed to the first side of the stator core in the axial direction. The first support has a first bearing housing that houses a bearing. The motor has a second support that is fixed on the second side of the stator core in the axial direction. The second support has a second bearing housing, which houses a bearing. The motor has a rotor has a rotor shaft, which is rotatably supported by the bearings and rotor core attached to the rotor shaft. The rotor core is turned towards the inside of the stator core. A first fan is attached to the rotor shaft between the rotor core and the first bearing housing. A first fan is formed between the first bearing housing and the first support, the first ventilation duct being configured to suck open air from an inspiratory door to a peripheral part of the first support. A second fan is attached to the rotor shaft between the rotor core and the second bearing housing. A second ventilation duct is formed between the second bearing housing and the second support, and the second ventilation duct is configured to suck open air from an inspiratory port to a peripheral part of the second support. The engine has a speed detection circuit having a detected part and a sensor. The detected part is attached to the first fan and located inside the ventilation duct. The sensor is operable to detect the detected part. The sensor is installed in the first ventilation duct and positioned against the detected part.
[00012] An electric motor, according to yet another modality, will be described. The motor has a stator core. The motor has a first support, which is fixed to the first side of the stator core in the axial direction. The first support has a first bearing housing that houses a bearing. The motor has a second support, which is fixed on the second side of the stator core in the axial direction. The second support has a second bearing housing, which houses a bearing. The motor has a rotor having a rotor shaft that is rotatably supported by bearings, and a rotor core attached to the rotor shaft. The rotor core is turned towards the inside of the stator core. A first fan is attached to the rotor shaft between the rotor core and the first bearing housing. A first ventilation duct is formed between the first bearing housing and the first support, the first ventilation duct being configured to suck open air from an inspiratory door to a peripheral part of the first support. A second ventilation duct is attached to the rotor shaft between the rotor core and the second bearing housing. A second ventilation duct is formed between the second bearing housing and the second support, the second ventilation duct being configured to suck open air from an inspiratory port to a peripheral part of the second support. The engine also has a rotation detection circuit having a detected part and a sensor. The detected part is attached to the second fan and disposed within the second ventilation duct. The sensor is operable to detect the detected part. The sensor is installed in the second ventilation duct and positioned against the detected part. Brief Description of Drawings
[00013] Figure 1 is a longitudinal section showing the electric motor, according to the First Mode; Figure 2 is a cross section of the electric motor; Figure 3 is a cross section of the electric motor, according to the Second Mode; Figure 4 is a longitudinal section showing the electric motor, according to the Third Mode; Figure 5 is a front view showing the longitudinal section and discharge nozzle, with the Electric Motor, according to the Fourth Mode being shown; Figure 6 is a sectional view showing the longitudinal section and discharge nozzle, with the Electric Motor, according to Fifth Mode being shown; Figure 7 is the front view and sectional view showing the discharge nozzle portion of the electric motor, according to the modification in the Fifth Modality; Figure 8 is a longitudinal section showing the Electric Motor, according to the Sixth Mode. Description of Modalities
[00014] Various modalities will be explained with reference to the drawings. The same reference numbers will be given to similar structures in the different modalities. Redundant explanations of equal parts of the same number will be omitted. Each figure is a mimetic diagram, illustrating a modality to help understanding. In each figure, shape, size, reason, etc. they may be different from those of a real apparatus according to known technology, variations in design may be provided according to the following explanation.
[00015] Figure 1 is a longitudinal section showing the motor fully encapsulated according to the First Mode. Figure 2 shows the cross section through the driven side of the electric motor aligned with line A-A in Figure 1.
[00016] As shown in Figure 1, the electric motor includes a cylindrical material, for example, the cylindrical stator core 1. A pair of annular core carriers 3 and 3 is attached at both ends of the stator iron core 1 in the axial direction. A plurality of connector plates 2 are allocated and extend in the direction of the geometric axis of the stator iron core 1, respectively, with these connector plates 2 connecting two core carriers 3 and 3 to the perimeter of the stator iron core. 1, and are attached to it. The connector plates 2 keep a gap towards the circumference of the stator iron core 1 and are located in the stator iron core 1. The cooling ventilation duct 2a is formed between the connector plates 2 and the peripheral face of the stator iron core 1.
[00017] The first almost cylindrical support 5 is formed from an aluminum alloy, etc. and affixed to the core holder 3 on the driven side of the stator iron core 1. The annular bearing support (first bearing housing) 7 ends at the tip side of the first support 5, concentrically, with the screw. The first bearing part 30 formed in the first bearing 9 ends with the screw in the central part of the bearing support 7.
[00018] The second support 6 has a vat shape, being made from an aluminum alloy, etc. and affixed to the core holder 3 and located at the end opposite the driven side of the stator iron core 1. The second support 6 has a second bearing housing 8 with bearing, that is, ball bearing 10, and ends with the screw in the central part of the second support 6.
[00019] The electric motor housing (body) comprises a stator iron core 1, annular core holder 3 and 3, the first support 5, first bearing housing 7, the second support 6, first bearing part 30, and second bearing housing 8.
[00020] The stator iron core 1 comprises a plurality of annular metallic plates, made from a magnetic material (for example, sheets of silicon steel).
[00021] A plurality of elongated grooves in the direction of a geometric axis are formed on the inner periphery of the stator iron core 1 and stator coils 17 are inserted into these grooves. The end of the stator coil 17 extends at both ends of the stator iron core 1 in the direction of the geometry axis. The stator comprises stator iron core 1 and stator coil 17.
[00022] The rotor iron core has a cylindrical shape 12 and is located on the same axis, maintaining a G space within the stator iron core 1. The rotor axis 11 is affixed to the central part of the rotor iron core 12 on the same axis. Both ends of the rotor shaft 11 are supported by roller bearing 9 and ball bearing 10, allowing free rotation. The rotor axis 11, in one case, is extended along the same axis.
[00023] The rotor shaft 11 and the rotor iron core make up rotor 16. The edge portion of the driven side 11a of the rotor shaft extends out of the plane. The joint for connecting the gear is attached to the edge part of the driven side 11a of the rotor shaft 11.
[00024] The rotor iron core 12 can be formed from several laminated magnetic materials (for example, silicon steel ring blade). The rotor iron core 12 is supported by a pair of iron core holders 13a, 13b attached to the rotor axis 11, so that the rotor iron core 12 is inserted on either side of the geometry axis. Iron core holder plates 13a, 13b are formed annularly, and the outside diameter is formed slightly smaller than the outside diameter of the rotor iron core 12.
[00025] A plurality of grooves, extending in the direction of a geometric axis, respectively, are formed in the peripheral part of the rotor iron core 12. The rotor bar 12 is inserted in each groove of the rotor iron core. 12. Both ends of the rotor bar 14 extend from the rotor iron core 12. The cantilevered portion of the rotor bar 14 is connected to the end rings 15 and 15. A "basket" rotor of an induction motor it is formed with rotor bar 14 and end ring 15. Energizing the stator coil 17, the iron core of rotor 12 is guided and rotates. When the rotor iron core 12 rotates, the rotor axis 11 also rotates.
[00026] To suppress the heat generation of the rotor and provide a more compact motor, the rotor can include a permanent magnet in the rotor core, instead of a "basket" type rotor, to form a permanent magnet type electric motor.
[00027] The fan 18 is attached to the rotor axis 11 between the first bearing part 30 on the driven side and the rotor iron core 12, on the same axis.
[00028] Fan 18 can rotate freely with the rotor shaft 11. Fan 18 is mainly funnel-shaped. Fan 18 consists of main plate 18a and propeller blade 18b. The main plate 18a is inclined and elongated towards the first support 5 from the side of the rotor iron core 12. A plurality of propeller blades 18b is installed on the main plate 18a, on the side facing the bearing direction 7.
[00029] The main plate 18a touches the rotor iron core 12 at many points via core holder 13a. A tiny gap is maintained, where an outer peripheral part 18a and the inner peripheral projecting part of an inner portion of the first support 5 engage with each other. This tiny circular span is mutually formed in an abbreviated two-step structure with a concave-convex shape, forming a section of labyrinth structure 32. A plurality of fins are formed on the bearing support 7 and on the opposite external surface.
[00030] As shown in Figures 1 and 2, the plurality of propeller blades 18b is installed in the peripheral part of the main board 18a. The propeller blades 18b extend radially. The propeller blades 18b are installed at regular intervals along the circumference of the main board 18a.
[00031] As shown in Figure 1, a plurality of inspiratory doors 19 are formed in the bearing support 7. The inspiratory doors 19 run outside the first bearing part 30, and are provided along the axis of the rotor 11 concentrically. The central part of the bearing support 7 has a projection section 7a that extends to the inside of the apparatus along the direction of a geometric axis of the rotor axis 11.0 discharge nozzle 20 is formed at the projection end of the projection 7a. The discharge nozzle 20 is formed on the same axis as the rotor axis 11.
[00032] The discharge nozzle 20 is placed near the central part of the main plate 18a of the fan 18, close to the rotor axis 11. On the bearing support 7, a guide channel 23 extends along the axis axis of the rotor 11 from the inspiratory port 19. A bearing support 7 extends towards the discharge nozzle 20 from the central section of the main plate 18a. A plurality of guide channels 23 are formed on the bearing support 7.
[00033] The space between the outer surface of the main plate 18a and the inside of the bearing support 7 and the peripheral part of the first support 5 is covered and the ventilation duct 5a is formed. From the central part of the main plate 18a, this ventilation duct 5a covers the perimeter of the first support 5 and extends radially. The ventilation duct 5a is divided by the main plate 18a of the fan 18 and the labyrinth structure section 32 from the inside of the body. The fan blades 18b of the fan 18 are located in the ventilation duct 5a. The ventilation duct 5a is opened to allow a free passage of a plurality of cooling ventilation ducts 2a formed from the stator iron core 1 and connection plate 2.
[00034] Because the stator coil 17 and rotor bar 14 generate heat during operation of an electric motor, performance can be maintained to the extent that the ventilation duct 5a ventilates open air to cool positively, in order to do not increase the temperature of the electric motor. The cooling action is provided as follows.
[00035] The rotation of the electric motor rotates the fan 18 and the rotor shaft 11. An air flow is provided in the propeller blade portion 18b of the fan 18b. Cold open air flows from the inspiratory air port 19 of the bearing support 7. Open air flows through the guide channel 19 and discharge nozzle 20 and flows close to the rotor axis 11 and central part of the main board 18a. The cooling air flows from the inside of the ventilation duct 5a to the perimeter on the outer surface of the main board 18a, from the central part of the main board 18a. The heat generated with the rotor bar 14 is transmitted to the main plate 18a by the main plate 18a of the iron core of the rotor 12, core holder 13a, and fan. The heat that is capable of transmitting from the main board 18a, radiates heat from the main board 19a and propeller blade 18b.
[00036] This composition allows the rotor bar 14 to be cooled. Simultaneously, the air flow generated by the propeller blade 18b flows into the ventilation ducts 2a of the plurality of ventilation ducts 5a of the first support 5. After this air flow cool the stator iron core 1 through the ventilation ducts 2a, the air flow is discharged. The heat generated by stator coils 17 diffuses to the stator iron core 1. This heat is radiated to the cooling air from the peripheral face of the stator iron core 1.
[00037] From the surface of the stator iron core 1, not directly surrounded by the connecting plate 2, the heat is automatically irradiated to open air, and the heat generation is additionally controlled. Hence, cooling the stator coil 17.
[00038] On the other hand, to prepare the electric motor for the purpose of controlling the rotation or controlling the braking of the vehicle, a rotation detection circuit is provided that the rotation number of an electric motor. The rotation detection circuit (for example, PG sensor 21 - a magnetic sensor) rotates with the rotor axis 11, included with the detection part 50 detectable by the PG sensor.
[00039] As shown in Figures 1 and 2, the PG 21 sensor is attached to the peripheral part of the first support 5, and extends in the ventilation duct 5a from the first support. The PG 21 sensor extends in the direction of the diameter towards the rotor axis 11, and the perception end is located in the ventilation duct 5a.
[00040] The detection part 50 comprises a magnetic body 22, for example, an annular iron gear plate. This gear plate 22 comprises many teeth 53, with which the perimeter portion forms an irregular line in the direction of the circumference, having a predetermined pitch.
[00041] The gear plate 22 is fixed outside the labyrinth structure section 32 on the external periphery of the main plate 18a of the fan 18. The gear plate 22 is located in the ventilation duct 5a, while on the same axis with the axis rotor 11. The gear plate 22 and sensor PG 21 are located along the direction of the rotor shaft diameter. 11.0 sensor PG 21 is located on the gear plate 22, facing out of the diameter.
[00042] The detection end of the PG 21 sensor is placed in space at a predetermined interval (for example, ± 1 mm) and being contoured with teeth 53.
[00043] The PG 21 sensor is installed approximately in the perpendicular direction, instead of in the discharge nozzle (here, the PG 21 sensor is the upper part from horizon B, passing through the center of the rotor axis 11).
[00044] According to this modality, the PG 21 sensor is installed above the rotor 11 axis in the perpendicular direction.
[00045] In the above composition, the rotation of the electric motor also rotates the gear plate 22 including fan 18. If the teeth 53 of the gear plate 22 pass through the detection ends of the PG 21 sensor, the PG 21 sensor detects the teeth 53 and produces a pulse signal. The rotation number of the electric motor and the rotation speed are detectable, detecting the pulse signal emitted from the PG 21 sensor.
[00046] The final fixing of the accessory arm 54 of the stator iron core 1 of the compound electric motor mentioned above is performed with rail car screw and screw. An electric motor is installed in the vehicles matching the gear (not shown) on the driven side 11a of the rotor shaft 11. The torque of the electric motor is transmitted to the wheel by the gear to move the vehicle.
[00047] According to a fully encapsulated motor, as mentioned, the stator coil 17, the rotor bar 14, and the inside of the device containing these, are covered by the first stator support 5, main plate 18a of the fan 18 , bearing housing 8, and second support 6. The inside of the device is isolated from open air by a section of labyrinth structure 32 provided between the fan 18 and the first support 5. The heat generation of the stator coil 17, radiates heat through a flow of cooling air, which passes through the peripheral face and cooling ventilation duct 2a of the stator iron core 1.
[00048] The heat generation from the rotor bar 14 radiates heat to the cooling air flow that passes through the ventilation duct 5a from the fan 18. This composition provides a fully encapsulated motor. The improved fully encapsulated motor does not introduce open air into the device, making filter and cleaning within the plane unnecessary, hence reducing maintenance.
[00049] The insulation performance of the stator coil is maintained indefinitely, due to the fact that the inside of the device is not contaminated.
[00050] The PG 21 sensor and gear plate 22, which detect the rotational speed of the electric motor, are installed in the ventilation duct 5a, between the fan 18 and the bearing support 7. Therefore, in relation to the case where the circuits of rotation detection are outside the plane and covered, the increase in the size of the electric motor's geometric axis can be controlled.
[00051] Therefore, even when providing a rotation detection circuit, it is not necessary to reduce the geometric axis in the direction of the stator iron core and rotor iron core, avoiding loss of power from the electric motor.
[00052] Because the PG 21 sensor and the gear plate 22 are installed along the diameter of the rotor shaft 11, even when the rotor 16 performs thermal expansion in the direction of the geometry axis with heat during operation, the PG sensor and the gear plate 22 can move only slightly in the direction of the geometry axis keeping the space between them at a predetermined value.
[00053] Through what is stabilized by the PG 21 sensor, and speed detection can be carried out.
[00054] The PG 21 sensor is outside the gear plate 22 and installed in the ventilation duct 5a perpendicularly, instead of in the discharge nozzle 20.
[00055] The extent of the damage caused to the rotation detection circuit by external substances collected between the PG 21 sensor and the gear plate 22, can thus be drastically reduced, providing a fully encapsulated motor with a rotation detection circuit. The rotation of the electric motor turns the fan 18, capturing open air through the inspiratory door 18 that passes through the ventilation duct 5a and cooling ventilation duct 2a from the discharge nozzle 20. In this situation, dust, particles, etc. (about 0.5 mm or larger), etc. can be captured by the ventilation duct 5a together with open air.
[00056] As shown in Figure 2, the dust discharge from the inspiratory port 19 is carried out, and passes close to the rotor axis 11, once with the nozzle 20. At this moment, the direction of the smaller dust particles (smaller than about 0.5 mm) S1 is greatly inverted at the rotor shaft position, because of the suction operation of the propeller blade 18b. Smaller dust particles are exhaled from the cooling ventilation duct 2a, through the ventilation duct 5a of the first support 5 with cooling air.
[00057] When large particles of powder S2 reach the axis of rotor 11, the speed of large particles of powder S2 drops. Because of the reduced speed and weight, the large dust particles S2 fall in the direction of the rotor 11 axis. That is, the large dust particles trapped in the space portion of the PG 21 sensor and gear plate 22 are blown through the air duct. cooling ventilation 2a under the rotor axis 11. Therefore, by installing the PG 21 sensor above the perpendicular direction, instead of in the center of the rotor 11 axis, the dust particles do not reach the PG 21 sensor and gear plate 22, preventing its retention.
[00058] A fully encapsulated motor, in which a rotation speed detection, stabilized without power loss, can be obtained with the modality described above.
[00059] Next, an electric motor, according to other modalities, will be explained. In the modalities described, the same reference numbers will be given to similar parties as in the First Modality, omitting the corresponding omitted redundant explanation.
[00060] Figure 3 is a cross-sectional view showing the rotation detection portion of the fully encapsulated motor, according to a second mode. In the second mode, the arrangement of the PG sensor, which makes up the rotation detection circuit, is different from that of the First Mode.
[00061] The PG 21 sensor is installed on the peripheral part of the first support 5 which is not perpendicular to the rotor axis 11. However, the PG 21 sensor is installed above the discharge nozzle 20 perpendicularly to the discharge nozzle 20. An upper ventilation duct is closed, among the four cooling ventilation ducts 2a provided at the perimeter of the cooling ventilation duct 1, and the PG 21 sensor is installed in the position of the closed upper cooling ventilation duct. It is attached to the first support 5, and the PG 21 sensor extends along the ventilation duct 5a. The PG 21 sensor is located along the direction of the gear plate diameter 22 and rotor shaft 11.
[00062] Various positions and the number of cooling ventilation ducts 2a and PG 21 sensors can be changed. Furthermore, in the Second Mode as above, the same operating effect as the First Mode can be obtained.
[00063] Figure 4 shows the vertical section of the fully encapsulated motor according to the Third Mode. In the Third Mode, the electric motor includes fan 60 on the opposite side to the driven side of the rotor shaft.
[00064] Fan 60 is attached to core holder 13b, on the same axis between bearing 10 on the end side opposite the driven side and iron core of rotor 12, and can rotate freely with respect to rotor 11. Fan 60 it has a main plate 6a, mainly funnel-shaped, and a plurality of helix blades 60b is provided on the peripheral part of the external surface of the main plate. The plurality of helix blades 60b is provided on the peripheral part of the external surface of the main board at a predetermined interval while, respectively, they are radially extended.
[00065] The main plate 60a touches the rotor iron core 12 in many ways via core port 13b. A tiny gap is maintained, where the outer peripheral part of the main plate 60a and the inner periphery of the projecting part from the side of the inside of the apparatus of the second support 6 intersect and mutually engage. This tiny circular span is mutually formed into a two-step abbreviated concave-convex shape and forms a labyrinth structure section 62. With this labyrinth structure section 62, the inside of the electric motor and the air flow intercept, and providing the complete encapsulation of the electric motor.
[00066] The ventilation duct 64 is formed between the outer surface of the main plate 60a and the inside of the bearing housing 8, and in addition a plurality of air intake holes 66 are formed on the outside of the bearing 10 of the bearing housing 8, and being opened to allow free passage for ventilation duct 64. A plurality of discharge nozzles 68 are formed at the perimeter of bearing housing 8 with the second support 6, and open to allow free passage for the ventilation duct 64.
[00067] The fan 60 rotates with respect to the rotor axis 11 and after admitting open air through the air intake holes 66 and passing along the ventilation duct 64 by the action of the fan blade 60b of the fan 60, it exhales the air opened out of the plane from the discharge nozzle 68. The heat generated by the rotor bar 14 is transmitted via the rotor iron core 12 and core holder 13b, and a cooling air flow is provided to radiate the heat from the external surface of the main board 60a. The PG 21 sensor and the gear plate 11, which make up a rotation detection circuit, are installed in the ventilation duct 5a on the driven side, as in the First Mode.
[00068] According to the Third Modality mentioned above, a fully encapsulated motor was obtained, with improved cooling capacity.
[00069] A rotation detection circuit can be provided not only on the driven side of the rotor shaft 11, but also on the opposite side to the driven side. In this case, a gear plate is attached to the fan 60 and located in the ventilation duct on the opposite side from the driven side. The PG sensor is attached to the second support 6 or bearing housing 8, in the ventilation duct.
[00070] Figure 5 shows the vertical section of a fully encapsulated motor in a front view of a discharge nozzle, according to the Fourth Mode. In the Fourth Mode, the composition of the discharge nozzle 20, which sends the captured cooling air to the ventilation duct 5a, is different from the First Mode.
[00071] As shown in Figure 1, it has an almost cylindrical projection section 7a, whose bearing support 7 is installed on the circumference of the bearing 9 in the central part and extending towards the inside of the device, and a discharge nozzle circular 20 is formed at the end of the projection. For the center of the rotor shaft 11, the eccentricity of the discharge nozzle 20 is provided above the perpendicular direction, and formed therein. That is, the gap between the top of the projection section 7a and the main plate 18a of the fan 18 is smaller than the gap between the bottom of the projection section 7a and the main plate 18a. Therefore, as for the upper part in the perpendicular direction, that is, the portion located on the side of the PG 21 sensor, the width is narrow instead of the lower ventilation duct between the ventilation ducts 5a.
[00072] Even when large particles of dust, such as sand particles, are captured by the inspiratory port together with a cooling air having such a composition, it is difficult to flow these particles into the narrower ventilation duct 5a at the top, hence possible to avoid reaching the PG 21 sensor, with more certainty.
[00073] Figure 6 is a cross-sectional view, expanding and showing the vertical section and the discharge nozzle of a fully encapsulated engine according to the Fifth Mode. According to the Fifth Mode, the composition of the discharge nozzle 20, which sends cooling air captured to the ventilation duct 5a, is different from that of the First Mode.
[00074] As shown in Figure 6, it has an almost cylindrical projection section 7a whose bearing support 7 is installed on the circumference of the bearing 9 in the central part and extending inside the appliance, and the circular discharge nozzle 20 being formed at the end of the projection. The discharge nozzle 20 is formed in the center and on the same axis as the rotor axis 11. The part of the upper section in the perpendicular direction of the projection section 7a extends closer to the main plate 18a of the fan 18 than to the base portion.
[00075] Through which, the upper portion of the discharge nozzle 20 approaches the rotor 11 axis more than the base portion, turning more towards the center, that is, the PG 21 sensor and the opposite, side of a rotor shaft. According to this modality, all circumferences are formed continuously, and the discharge nozzle 20 tilts obliquely in relation to the rotor axis 11.
[00076] Even when large dust particles are captured by the inspiratory port 19 along with cooling air of such composition, such dust particles can be exhaled downwards perpendicularly from the discharge nozzle 20.
[00077] Therefore, it is difficult for the dust particles to enter the upper ventilation duct 5a, preventing the dust particles from reaching the PG 21 sensor with more certainty.
[00078] In the above composition, although all circumferences are formed continuously, the discharge nozzle 20 can extend only in the perpendicular direction from the upper half of the projection section 7a to the side of the main plate 18a of the fan 18, instead of the portion base, as shown in Figure 7.
[00079] Therefore, the upper half of the discharge nozzle 20 approaches the rotor axis 11 more than the lower half, and turning more towards the center, that is, the PG 21 sensor and the opposite side of the rotor axis. As described, also with this composition, it is difficult for the dust particles to enter the upper ventilation duct 5a, and preventing the dust particles from reaching the PG 21 sensor, with more certainty.
[00080] Figure 8 shows the vertical section of the fully encapsulated motor according to Sixth Mode. According to the Sixth Mode, the fixing position of the gear plate 22 and sensor PG 21 is different from that of the First Mode. As shown in Figure 8, the gear plate 22 is cylindrical and attached to the fan blade 18b of the fan 18. The gear plate 22 is located on the same axis with the rotor axis 11 and located in the ventilation duct 5a. The end on the bearing support side 7 of the gear plate 22 is irregular over the entire circumference and includes a plurality of teeth 53.
[00081] The PG 21 sensor is attached to the bearing support 7, and extends towards the ventilation duct 5a, along a direction almost parallel to the rotor axis 11.
[00082] The detection end of the PG 21 sensor is placed in a predetermined space (for example, about 1 mm) and the opposite tooth 53 of the main plate 22. The PG 21 sensor is placed in an upper position above the rotor axis 11 and discharge nozzle 20. Thus, the PG 21 sensor can be installed not only on the peripheral part of the first support 5, but also in other positions.
[00083] Also in the Sixth Mode, composed as mentioned above, as in the First Mode mentioned above, the extent of damage caused to the rotation detection circuit by external substances collected between the PG 21 sensor and the main board 22, can be drastically reduced , and a fully encapsulated motor having a speed detection circuit can be provided additionally.
[00084] And also in the Second to Sixth Modes mentioned above, a fully encapsulated motor, in which the speed detection is stabilized without producing a drop in power, is obtainable.
[00085] The present description, which is not limited to the above modality, in the form described, in a manufacturing stage in a range that does not escape the scope, can change a component and be materialized. Various embodiments may be formed with an appropriate combination of components from the plurality currently indicated by the above embodiment. For example, some components can be dispensed with from all components shown in one embodiment. Components covering a different modality can be combined appropriately.
[00086] Although certain modalities have been described, they were presented in an exemplary manner, and are not intended to limit the scope of the invention. In fact, the new methods and devices described here can be configured in a variety of ways, and various omissions, substitutions, and changes in the described modes can be made within the spirit of the invention. The attached embodiments and their equivalents are intended to cover such forms or modifications, provided that they are within the scope and spirit of the invention.

权利要求:
Claims (20)
[0001]
1. Electric motor comprising: a stator core; a first support (5) fixed to the first side of the stator core in an axial direction; a first bearing housing (7) attached to the first support, wherein the first bearing housing (7) houses a bearing; a second support (6) attached to the second side of the stator core in the axial direction; a second bearing housing (8) attached to the second support, the second housing (8) housing a bearing; a rotor comprising: a rotor shaft (11) rotationally supported by the bearings; and a rotor core (12) affixed to the rotor shaft, where the rotor core (12) faces an internal side of the stator core; a fan (18) attached to the rotor shaft between the rotor core (12) and the first bearing housing (7); a ventilation duct (5a) formed between the first bearing housing (7) and the first support (5), in which the ventilation duct (5a) is configured to suck open air from one or more inspiratory doors (19 ) to a peripheral part of the first support (5); and a rotation detection circuit comprising: a detected part attached to the fan (18) within the ventilation duct (5a); and a sensor (21) operable to detect the detected part, in which the sensor (21) is installed in the ventilation duct (5a) and is positioned opposite to the detected part, and characterized by the fact that the sensor (21) is positioned above all the inspiratory doors (19) of the electric motor.
[0002]
2. Electric motor, according to claim 1, characterized by the fact that a maze structure is formed by a peripheral part of the fan (18) engaged by an internal portion of the first support (5) with a gap between them.
[0003]
3. Electric motor, according to claim 2, characterized by the fact that the sensor (21) is positioned centered above the geometric axis of the rotor axis (11).
[0004]
4. Electric motor according to claim 3, characterized by the fact that the sensor (21) is attached to a peripheral part of the first support (5) and extends into the ventilation duct (5a).
[0005]
5. Electric motor, according to claim 2, characterized by the fact that the sensor (21) is positioned above the geometric axis of the rotor axis (11) and is horizontally displaced from the geometric axis of the rotor axis.
[0006]
6. Electric motor, according to claim 2, characterized by the fact that: the detected part comprises a gear plate (22) attached to the fan (18); and the gear plate (22) has a plurality of teeth (53), arranged along the circumference of the plate, at a predetermined interval.
[0007]
7. Electric motor according to claim 6, characterized by the fact that the gear plate (22) is located outside the labyrinth structure, and the gear plate (22) and the sensor (21) are arranged in one direction following the circumference of the rotor shaft (11).
[0008]
8. Electric motor according to claim 2, characterized by the fact that the fan (18) comprises a plurality of propeller blades (18b); the detected part comprises a gear plate (22) attached to the propeller blades (18b); the gear plate (22) has a plurality of teeth (53) arranged along the circumference of the plate (22) at a predetermined interval.
[0009]
9. Electric motor, according to claim 1, characterized by the fact that it comprises: a cylindrical projection formed in the first bearing housing (7); and a discharge nozzle (20) formed in the cylindrical projection, in which the discharge nozzle is eccentric.
[0010]
10. Electric motor according to claim 1, characterized by the fact that it comprises a cylindrical projection formed in the first bearing housing (7), in which an upper portion of the cylindrical projection extends more towards the fan (18) than a base portion of the cylindrical projection.
[0011]
11. Electric motor comprising: a stator core; a first support (5) fixed to the first side of the stator core in an axial direction; a first bearing housing (7) attached to the first support, wherein the first bearing housing (7) houses a bearing; a second support (6) attached to the second side of the stator core in the axial direction; a second bearing housing (8) attached to the second support, wherein the second bearing housing (8) houses a bearing; a rotor comprising: a rotor shaft (11) rotationally supported by the bearings; and a rotor core (12) affixed to the rotor shaft, where the rotor core (12) faces an internal side of the stator core; a first fan (18) attached to the rotor shaft (11) between the rotor core (12) and the first bearing housing (7); a first ventilation duct (5a) formed between the first bearing housing (7) and the first support (5), wherein the first ventilation duct (5a) is configured to suck open air from one or more inspiratory doors (19) for a peripheral part of the first support; a second fan attached to the rotor shaft (11) between the rotor core (12) and the second bearing housing (8); and a second ventilation duct (5a) formed between the second bearing housing (8) and the second support (6), wherein the second ventilation duct (5a) is configured to suck open air from one or more doors inspiratory (19) for a peripheral part of the second support; and a rotation detection circuit comprising: a detected part attached to the first fan (18) within the first ventilation duct (5a); and a sensor (21) operable to detect the detected part, in which the sensor (21) is installed in the first ventilation duct (5a) and is positioned opposite the detected part, and characterized by the fact that the sensor (21) is positioned above all the inspiratory doors (19) of the electric motor.
[0012]
12. Electric motor according to claim 11, characterized by the fact that: a first labyrinth structure is formed by a peripheral part of the first fan (18) engaged by an internal portion of the first support (5) with a gap between them ; and a second labyrinth structure is formed by a peripheral part of the second fan engaged by an internal portion of the second support with a gap between them.
[0013]
13. Electric motor, according to claim 12, characterized by the fact that the sensor (21) is positioned centered above the geometric axis of the rotor axis (11).
[0014]
14. Electric motor, according to claim 13, characterized by the fact that the sensor (21) is attached to a peripheral part of the first support (5) and extends into the ventilation duct (5a).
[0015]
15. Electric motor according to claim 12 characterized by the fact that the sensor (21) is positioned above the geometric axis of the rotor axis (11) and is horizontally displaced from the geometric axis of the rotor axis.
[0016]
16. Electric motor comprising: a stator core; a first support (5) fixed to the first side of the stator core in an axial direction; a first bearing housing (7) attached to the first support (5), wherein the first bearing housing (7) houses a bearing; a second support (6) attached to the second side of the stator core in the axial direction; a second bearing housing (8) attached to the second support (6), wherein the second bearing housing (8) houses a bearing; a rotor comprising: a rotor shaft (11) rotationally supported by the bearings; and a rotor core (12) affixed to the rotor shaft, where the rotor core (12) faces an internal side of the stator core; a first fan (18) attached to the rotor shaft (11) between the rotor core (12) and the first bearing housing (7); a first ventilation duct (5a) formed between the first bearing housing (7) and the first support (5), wherein the first ventilation duct (5a) is configured to suck open air from one or more inspiratory doors (19) to a peripheral part of the first support (5); a second fan attached to the rotor shaft (11) between the rotor core (12) and the second bearing housing (8); and a second ventilation duct (5a) formed between the second bearing housing (8) and the second support (6), wherein the second ventilation duct (5a) is configured to suck open air from one or more doors inspiratory (19) to a peripheral part of the second support (6); and a rotation detection circuit comprising: a detected part attached to the second fan within the second ventilation duct (5a); and a sensor (21) operable to detect the detected part, in which the sensor (21) is installed in the second ventilation duct (5a) and is positioned opposite to the detected part, and characterized by the fact that the sensor (21) is positioned above all the inspiratory doors (19) of the electric motor.
[0017]
17. Electric motor, according to claim 16, characterized by the fact that: a first labyrinth structure is formed by a peripheral part of the first fan engaged by an internal portion of the first support (5) with a gap between them; and a second labyrinth structure is formed by a peripheral part of the second fan engaged by an internal portion of the second support (6) with a gap between them.
[0018]
18. Electric motor, according to claim 17, characterized by the fact that the sensor (21) is positioned centered above the geometric axis of the rotor axis (11).
[0019]
19. Electric motor according to claim 18, characterized by the fact that the sensor (21) is attached to a peripheral part of the second support (6) and extends into the second ventilation duct (5a).
[0020]
20. Electric motor according to claim 17, characterized by the fact that the sensor (21) is positioned above the geometric axis of the rotor axis (11) and is horizontally displaced from the geometric axis of the rotor axis.

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同族专利:

公开号 | 公开日

JP2012175757A|2012-09-10|

CN104094504A|2014-10-08|

WO2012111259A3|2014-04-10|

US20120212086A1|2012-08-23|

EP2681826B1|2016-01-20|

US9300191B2|2016-03-29|

WO2012111259A2|2012-08-23|

BR112013020664A2|2016-10-18|

CN104094504B|2016-11-09|

EP2681826A2|2014-01-08|

SG192804A1|2013-09-30|

JP5951182B2|2016-07-13|

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EP3611828A1|2018-08-16|2020-02-19|Siemens Aktiengesellschaft|Dynamoelectric rotary machine with air gap encapsulation|

法律状态:
2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

2019-07-23| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

2020-05-19| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

2020-10-13| 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 26/01/2012, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

申请号 | 申请日 | 专利标题

JP2011-033444|2011-02-18|

JP2011033444A|JP5951182B2|2011-02-18|2011-02-18|Electric motor|

PCT/JP2012/000489|WO2012111259A2|2011-02-18|2012-01-26|Electric motor|

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