JP6949097B2 - Rotating machine for vehicles - Google Patents

Description

The present application relates to a rotary electric machine for a vehicle.

A rotary electric machine with a control device that connects a motor unit and an inverter assembly is used in a vehicle. When a rotary electric machine is used in a vehicle, it is desired to make the rotary electric machine compact, and a structure for making the rotary electric machine compact is disclosed. For example, the inverter assembly is provided with a power module body in which a set of upper and lower arms is provided in the circumferential direction of the rotation axis of the rotor provided by the motor unit, and the grounds (GND) of the upper and lower arms of the power module body are set to one. By sharing it with one terminal, the rotary electric machine for vehicles is made compact.

If the motor is composed of three phases and two poles, the motor unit includes three pairs of terminals having a potential difference. Considering easy connection between each terminal and the connection destination, each terminal is provided with an uninsulated live wire exposed. Each terminal that communicates with the end of the field winding of the motor part should be at least the outer diameter of the field winding from the center of the rotating shaft so as not to obstruct the ventilation passage of the exhaust port provided by the rear bracket that covers the motor part. It is placed in a distant position. Further, the rear cover that covers the rotary electric machine for vehicles from the rear side is provided with a large number of intake ports along the outer circumference of the rotary electric machine for vehicles in order to easily cool the internal parts. Due to the demand for compactness of air-cooled rotary electric machines for vehicles, outside air is sucked in from the intake port provided in part of the rear cover by a centrifugal fan provided in the rotor so as to cool the heat sink equipped with the power module. , The structure is such that the bracket that holds and fixes the stator is equipped with an exhaust port. However, the muddy water from the tires is splashed up from the intake port and the exhaust port, so that the inside of the rotary electric machine for the vehicle is flooded. Therefore, in order to eliminate the ingress of water around the terminal inside the rotary electric machine for vehicles, a structure is disclosed around the terminal, which is shielded by a wall except in the direction in which the terminal is pulled out (for example, a patent). Reference 1).

Japanese Unexamined Patent Publication No. 2009-113740

In Patent Document 1, if the direction in which the terminal is pulled out is not the direction in which the terminal is exposed to water, the water exposure to the terminal can be suppressed. However, three pairs of terminals with a potential difference that are not insulated are not provided in the same direction, and when they are provided at an angle of 90 degrees, for example, one of the terminals is often in the direction of water reception, and is covered. There is a problem that water collects around the terminal due to water and electrolytic corrosion occurs at the terminal.

If there is a risk of electrolytic corrosion due to the ingress of water around the terminals, there is a problem that the number of parts of the rotary electric machine and the assembly man-hours increase because the terminals need to be insulated by a dedicated member. Further, since it is necessary to extend the creepage distance between the terminals having a potential difference, there is a problem that it is contrary to the compactification of the entire rotary electric machine.

The present application has been made to solve the above-mentioned problems, and an object of the present application is to obtain a rotary electric machine for a vehicle in which electrolytic corrosion generated at adjacent terminals having a potential difference is suppressed.

The vehicle rotary electric machine disclosed in the present application holds a rotor surrounding the rotor, at least one centrifugal fan provided on the rotor, and one end side of the rotor via a bearing, and front of the rotor. A front bracket that covers the side, a rear bracket that holds the other end side of the rotating shaft via a bearing and covers the rear side of the rotor, and a rear bracket that surrounds the rotor and is provided inside the front bracket and the rear bracket. A motor unit having a rotor, a power module connected to the motor unit to supply armature current during driving and rectifying armature current during power generation, and a power module connected to the motor unit to control field current. A field module, a control module that controls the power module and the field module, a case that surrounds the power module, the field module, and the control module, and a heat sink that is provided in contact with the power module and cools the power module. It is a rotary electric machine for vehicles equipped with an inverter assembly provided on the rear bracket side of the motor unit and a cover surrounding the inverter assembly. It is electrically connected to a power module, protrudes from a case, and has a potential difference. It is provided with an adjacent first terminal and second terminal, and a plate-shaped insulating wall provided between the first terminal and the second terminal, and the first terminal and the second terminal. A space is provided around each of the terminals, and the insulating wall separates the connecting parts attached to the first terminal and the first terminal from the connecting parts attached to the second terminal and the second terminal. The insulating wall is provided on both the case and the cover, respectively, and the insulating wall provided on the case and the insulating wall provided on the cover are separated from each other .

According to the rotary electric machine for vehicles disclosed in the present application, it is possible to suppress electrolytic corrosion generated at terminals having adjacent potential differences.

It is sectional drawing which shows the rotary electric machine for vehicle which concerns on Embodiment 1. FIG. It is sectional drawing of a part of the rotary electric machine for a vehicle which concerns on Embodiment 1. FIG. It is a front view which shows the side of the inverter assembly of the rotary electric machine for a vehicle which concerns on Embodiment 1. FIG. It is a perspective view which shows the appearance of the power module of the rotary electric machine for a vehicle which concerns on Embodiment 1. FIG. It is a front view which shows a part of the inverter assembly of the rotary electric machine for a vehicle which concerns on Embodiment 1. FIG. It is a front view which shows a part of another inverter assembly of the rotary electric machine for a vehicle which concerns on Embodiment 1. FIG. It is a front view which shows the side of the inverter assembly of the rotary electric machine for a vehicle which concerns on Embodiment 2. FIG. It is a front view which shows a part of another inverter assembly of the rotary electric machine for a vehicle which concerns on Embodiment 2. FIG. It is a perspective view which shows the appearance of the insulating wall of the rotary electric machine for a vehicle which concerns on Embodiment 3. FIG. It is a perspective view of a part of the rotary electric machine for a vehicle which concerns on Embodiment 4. FIG.

Hereinafter, the rotary electric machine for vehicles according to the embodiment of the present application will be described with reference to the drawings. In each figure, the same or corresponding members and parts will be described with the same reference numerals.

Embodiment 1.
FIG. 1 is a cross-sectional view showing a vehicle rotary electric machine 1, FIG. 2 is a cross-sectional view of a part of the vehicle rotary electric machine 1, and FIG. 3 is a front view showing the side of the inverter assembly 30 of the vehicle rotary electric machine 1. However, FIG. 2 is a cross-sectional view showing a state before the inverter assembly 30 of the rotary electric machine 1 for a vehicle is mounted on the motor unit 40, and FIG. 3 is a view showing the inverter assembly 30 with the cover 50 of the portion covering the front surface removed. Is. The vehicle rotary electric machine 1 is a vehicle rotary electric machine 1 including a motor unit 40, an inverter assembly 30, and a cover 50, and a control device integrated type in which the motor unit 40 and the inverter assembly 30 are connected. The cover 50 is made of, for example, a polyamide synthetic resin and surrounds the inverter assembly 30. The details of each part will be described below.

The motor unit 40 holds one end side of the rotating shaft 11 via a rotor 2, a centrifugal fan 20 and a centrifugal fan 21 provided on the rotor 2, and a bearing 7, and the rotor 2 The front bracket 4 that covers the front side, the rear bracket 5 that holds the other end side of the rotating shaft 11 via the bearing 8 and covers the rear side of the rotor 2, and the front bracket 4 that surrounds the rotor 2. It is composed of a stator 3 provided inside the rear bracket 5. Here, the front side is the side of the pulley 12, and the rear side is the opposite side. The rotating shaft 11 is rotatably supported by bearings 7 and 8. A field winding 2a is wound around the field iron core 2b of the rotor 2. The winding of the stator 3 has two sets of three-phase winding groups, and the three-phase stator winding 3a is wound. One end side of the rotating shaft 11 projects from the front bracket 4, and a pulley 12 is provided at the tip end portion. The pulley 12 is connected to an internal combustion engine (not shown) via a belt (not shown) and transfers torque to and from the internal combustion engine in both directions. The other end side of the rotating shaft 11 protrudes from the rear bracket 5, and a slip ring 13 is provided at the tip end portion. A field current is supplied to the field winding 2a via the slip ring 13. The rotary electric machine 1 for a vehicle includes a brush holder 16 provided with a brush 16a, and the brush 16a energizes the field winding 2a by sliding a slip ring 13 provided with the rotating shaft 11. A centrifugal fan 20 and a centrifugal fan 21 that generate cooling air to cool the inside of the motor unit 40 are attached to the rotating shaft 11 on each of the opposing end faces of the field iron core 2b. At least one centrifugal fan is provided in the motor unit 40. The rear bracket 5 that sucks in outside air from the intake port 50a provided in a part of the cover 50 and holds and fixes the stator 3 has a structure provided with an exhaust port 41. Since the motor unit 40 is a motor composed of three phases and two poles, as shown in FIG. 3, the output terminals from the motor unit 40 are three pairs of AC terminal 14a and ground terminal 14b.

The inverter assembly 30 includes a power module 9 connected to the motor unit 40 to supply armature current during driving and rectify the armature current during power generation, and a field module 10 connected to the motor unit to control the field current. And a control module 17 provided with a control circuit for controlling the power module 9 and the field module 10. Further, the inverter assembly 30 surrounds the power module 9, the field module 10, and the control module 17, and has a case 14 having a plurality of terminals connected to the power system terminals of each module, and the power module 9 and the field. It has a heat sink 15 provided in contact with the module 10. The inverter assembly 30 is provided on the side of the rear bracket 5 of the motor unit 40 so that the heat sink 15 and the rear bracket 5 face each other. The power module 9 and the field module 10 include a switching element and its peripheral circuits. The heat sink 15 cools the components included in the power module 9 and the field module 10.

The power module 9 and the field module 10 have a fuse function unit that blows a line that supplies power when an unintended large current flows. FIG. 4 is a perspective view showing the appearance of the power module 9 of the rotary electric machine 1 for a vehicle according to the first embodiment. The power module 9 includes a terminal 9a of the power module 9 connected to the main electrode of the switching element as a power lead, and the terminal 9a is provided with a narrowed portion 9b having a small cross-sectional area. The narrowed portion 9b functions as a fuse at the terminal 9a connected to the bus bar 60. A similar structure is provided in the field module 10. As shown in FIG. 3, the power module 9 provided with the terminal 9a is arranged on the side of the rotating shaft 11 which is on the inner diameter side of the AC terminal 14a and the ground terminal 14b. A labyrinth structure is formed by the case 14 and the cover 50, and it is difficult for water to enter the narrowed portion 9b provided on the inner diameter side of this configuration due to splashing of muddy water or the like, and disconnection of the narrowed portion 9b is suppressed.

The case 14 is made of an insulating resin, for example polyphenylene sulfide. As shown in FIG. 3, the case 14 is electrically connected to the power module 9, protrudes from the case 14, and has an adjacent first terminal AC terminal 14a and a second terminal ground terminal 14b having a potential difference. To be equipped with. The AC terminal 14a and the ground terminal 14b are terminals for connecting the power module 9 and the motor unit 40. Each of the AC terminal 14a and the ground terminal 14b is integrally molded into the case 14. The AC terminal 14a and the ground terminal 14b are arranged on the same plane. A plate-shaped insulating wall 24 is provided between the AC terminal 14a and the ground terminal 14b, and a space is provided around each of the AC terminal 14a and the ground terminal 14b. The outer shape of the case 14 is generally rectangular in order to simplify the mountability of each module and the configuration of peripheral circuits. Further, the outer shape of the heat sink 15 is also provided in a shape substantially matching the outer shape of the case 14. After mounting each module and the like, the inverter assembly 30 is sealed with the resin 25 as shown in FIG.

As shown in FIG. 1, the rotary electric machine 1 for a vehicle includes a magnetic pole position detection sensor 6 that detects the rotational state of the rotor 2. The magnetic pole position detection sensor 6 is arranged outside the rear bracket 5 between the slip ring 13 and the bearing 8 so as to be coaxial with the rotating shaft 11, and appropriately detects the position of the magnetic pole of the rotating shaft 11, that is, the rotor 2. do. The magnetic pole position detection sensor 6 is composed of a sensor stator 6a and a sensor rotor 6b. A sensor rotor 6b made of an iron core is provided on the rotating shaft 11 inside the sensor stator 6a. The sensor stator 6a is mounted on the heat sink 15, and the signal wiring of the magnetic pole position detection sensor 6 is connected to the control module 17.

As shown in FIG. 2, the rotary electric machine 1 for a vehicle includes a connecting board 18. The connecting board 18 is a board in which a terminal 19 for connecting the motor unit 40 and the inverter assembly 30 is insert-molded. The connecting board 18 is provided between the inverter assembly 30 and the rear bracket 5, and is fixed to the rear bracket 5 with screws 22 as shown in FIG.

The outline of the assembly of the rotary electric machine 1 for a vehicle will be described. The connecting board 18 is fixed to the rear bracket 5, and the inverter assembly 30 is fixed to the boss 5a of the rear bracket 5 with screws 23. The space through which the central rotating shaft 11 of the inverter assembly 30 passes is the intake port 50a, and the brush holder 16 is arranged next to the rotating shaft 11 and fixed to the inverter assembly 30. In order to protect the inverter assembly 30 and the brush 16a from the outside and insulate them, a cover 50 is mounted on the inverter assembly 30 so as to follow the outer peripheral shape of the inverter assembly 30.

The connection between the stator lead wire 3b of the motor unit 40 and the power module 9 will be described. As shown in FIG. 2, the stator lead wire 3b is an end portion of the three-phase stator winding 3a. The stator lead wire 3b penetrates the rear bracket 5 and is welded and joined to the motor portion side terminal 19a, which is one of the terminals 19 provided on the connecting board 18. The inverter assembly side terminal 19b, which is another terminal 19 connected to the motor unit side terminal 19a, and the AC terminal 14a are connected by a screw which is a connecting component. The AC terminal 14a and the terminal 9a of the power module 9 are joined by welding or the like. The ground terminal 14b (not shown in FIG. 2) is connected to the heat sink 15 with a screw.

FIG. 5 is a front view showing a part of the inverter assembly 30 of the rotary electric machine 1 for a vehicle according to the first embodiment, and is an enlarged view of the periphery of the AC terminal 14a and the ground terminal 14b. An insulating wall 24 is provided in the case 14 between the AC terminal 14a and the ground terminal 14b, respectively. The insulating wall 24 is made of resin and is integrally molded with the case 14. As shown in FIG. 2, the size of the insulating wall 24 in the vertical direction of the paper surface is determined by the screws (not shown) attached to the AC terminal 14a and the AC terminal 14a, and the adjacent ground terminals 14b and 14b. It is the height that separates the screws to be attached. By providing the insulating wall 24, the creepage distance between the AC terminal 14a and the ground terminal 14b is extended. Since the insulating wall 24 has a plate shape and water escapes even if water enters the periphery of the AC terminal 14a and the ground terminal 14b, it is possible to prevent water from staying around the AC terminal 14a and the ground terminal 14b.

Although the insulating wall 24 is provided in the case 14 in FIG. 5, the place where the insulating wall 24 is arranged is not limited to the case 14. FIG. 6 is a front view showing a part of another inverter assembly 30 of the rotary electric machine for a vehicle according to the first embodiment. The insulating wall 24 is provided on the cover 50 between the AC terminal 14a and the ground terminal 14b, respectively. The insulating wall 24 made of resin is integrally molded with the cover 50. Since the cover 50 does not have any component parts such as those provided by insert molding, the cover 50 is made thinner and lighter. The insulating wall 24 provided on the cover 50 is thinned like the cover 50. Therefore, the insulating wall 24 is reinforced by providing a protrusion shape at the tip of the insulating wall 24.

If the upward direction with respect to the road surface is defined as the top direction, it is desirable that the direction in which the rotary electric machine 1 for a vehicle is installed is the top direction in FIG. 1 and the ground direction in which the bottom direction is the road surface. As shown in FIG. 1, the brush 16a is arranged in the vertical direction with respect to the power module 9. By arranging the brush 16a in the vertical direction, clogging of the brush due to water exposure due to splashing of muddy water or the like is suppressed. By suppressing brush clogging, disconnection of the field circuit is avoided. Even if the power module 9 is in the ground direction, since the plate-shaped insulating wall 24 is provided between the AC terminal 14a and the ground terminal 14b, water is suppressed from staying around the AC terminal 14a and the ground terminal 14b. ..

As described above, in the vehicle rotary electric machine 1 according to the first embodiment, the plate-shaped insulating wall provided between the AC terminal 14a and the ground terminal 14b having adjacent potential differences and the AC terminal 14a and the ground terminal 14b is provided. Since 24 is provided and a space is provided around the AC terminal 14a and the ground terminal 14b, the creepage distance between the AC terminal 14a and the ground terminal 14b is extended, and water stays around the AC terminal 14a and the ground terminal 14b. Therefore, it is possible to suppress electrolytic corrosion that may occur at the AC terminal 14a and the ground terminal 14b having adjacent potential differences. Since the size of the insulating wall 24 is the height that separates the screw attached to the AC terminal 14a and the AC terminal 14a from the screw attached to the adjacent ground terminal 14b and the ground terminal 14b, there is a potential difference between adjacent parts. The creepage distance of is surely extended. Since the insulating wall 24 is provided on the case 14 or the cover 50, the conventional layout can be maintained unchanged. When the insulating wall 24 made of resin is integrally molded with the case 14 or the cover 50, the number of parts can be reduced and the rotary electric machine 1 for a vehicle can be easily assembled. When the AC terminal 14a and the ground terminal 14b are integrally molded on the case 14, the number of parts can be reduced and the assembly man-hours can be reduced. When the AC terminal 14a and the ground terminal 14b are integrally molded on the case 14, and the insulating wall 24 is integrally molded on the case 14, the AC terminal 14a, the ground terminal 14b and the insulating wall 24 are aligned with each other. It is unnecessary, and the rotary electric machine 1 for a vehicle can be easily assembled. When the AC terminal 14a and the ground terminal 14b are arranged side by side on the same plane, the workability of assembly can be improved and the height of the insulating wall 24 can be reduced.

Embodiment 2.
The rotary electric machine 1 for a vehicle according to the second embodiment will be described. FIG. 7 is a front view showing the inverter assembly 30 of the rotary electric machine 1 for a vehicle. However, FIG. 7 is a view showing the inverter assembly 30 with the cover 50 of the portion covering the front surface removed. The rotary electric machine 1 for a vehicle according to the second embodiment has a configuration in which an insulating wall 24 is provided on both the case 14 and the cover 50.

Insulating walls 24 are provided between the AC terminal 14a and the ground terminal 14b, respectively, on both the case 14 and the cover 50, respectively. The insulating wall 24 is made of resin, the insulating wall 24 provided on the case 14 is integrally molded on the case 14, and the insulating wall 24 provided on the cover 50 is integrally molded on the cover 50. The insulating wall 24 provided on the case 14 and the insulating wall 24 provided on the cover 50 are separated from each other. The insulating wall 24 provided on the case 14 and the insulating wall 24 provided on the cover 50 are arranged so as to be overlapped with each other when viewed from a direction perpendicular to the insulating wall 24. Here, the AC terminal 14a and the ground terminal 14b project from the same side surface of the case 14, and the adjacent insulating walls 24 are provided so as to overlap each other in the circumferential direction of the rotating shaft 11.

For example, when an aqueous solution of calcium chloride, which is a main component of a road antifreeze material containing mud having a high viscosity coefficient, enters the inside of a rotating electric machine 1 for a vehicle by winding a tire or the like, the rotating shaft 11 of the insulating wall 24 extends. At the end of the direction, the mud of the calcium chloride aqueous solution may settle and accumulate water. Even if water is accumulated, leakage current can be reduced by providing a plurality of insulating walls 24 to extend the creepage distance, and electrolytic corrosion that can occur at the AC terminal 14a and the ground terminal 14b can be suppressed.

In FIG. 7, the AC terminal 14a and the ground terminal 14b project from the same side surface of the case 14, and the adjacent insulating walls 24 are provided so as to overlap each other in the circumferential direction of the rotating shaft 11, but the insulating walls 24 are arranged. Is not limited to this. FIG. 8 is a front view showing a part of another inverter assembly 30 of the rotary electric machine 1 for a vehicle according to the second embodiment. Here, the AC terminal 14c, the ground terminal 14b, and the AC terminal 14a project from different side surfaces of the case 14, and the insulating wall 24 provided between the AC terminal 14c and the ground terminal 14b is provided so as to overlap in the direction of the rotation shaft 11. Be done. Even in such an arrangement, the leakage current can be reduced by extending the creepage distance.

In order to extend the creepage distance, it is preferable to increase the length of each adjacent insulating wall 24 to increase the overlap. However, when the length of the insulating wall 24 is increased, the space 26 around the AC terminal 14a and the ground terminal 14b is narrowed, and when there is water, it is difficult for water to fall out and water tends to stay. Therefore, the length of the insulating wall 24 may be appropriately determined according to the degree, frequency, viscosity, and the like of water that can enter the inside of the rotary electric machine 1 for vehicles. Further, as shown in FIG. 7, the insulating wall 24 provided on the case 14 is arranged adjacent to the ground terminal 14b, but the insulating wall 24 provided on the cover 50 may be arranged adjacent to the ground terminal 14b. No.

As described above, in the rotary electric machine 1 for vehicles according to the second embodiment, since the insulating wall 24 is provided on both the case 14 and the cover 50, the creepage distance between the AC terminal 14a and the ground terminal 14b is further extended, and the AC Even if water containing mud having a high viscosity coefficient is accumulated around the terminals 14a and the ground terminal 14b, it is possible to suppress electrolytic corrosion that may occur at the AC terminal 14a and the ground terminal 14b having adjacent potential differences. .. Since the insulating wall 24 provided on the case 14 and the insulating wall 24 provided on the cover 50 are separated from each other, it is possible to secure a space around the AC terminal 14a and the ground terminal 14b to extend the creepage distance. can. Since the insulating wall 24 provided on the case 14 and the insulating wall 24 provided on the cover 50 are arranged so as to be overlapped with each other when viewed from the direction perpendicular to the insulating wall 24, the creepage distance can be extended. ..

Embodiment 3.
The rotary electric machine 1 for a vehicle according to the third embodiment will be described. FIG. 9 is a perspective view showing the appearance of the insulating wall 24 of the rotary electric machine 1 for a vehicle. In FIG. 9, the cover 50 shows only the side surfaces surrounding the inverter assembly 30. The rotary electric machine 1 for a vehicle according to the third embodiment has a configuration in which adjacent insulating walls 24 are provided at different heights.

The insulating wall 24 provided on the case 14 and the insulating wall 24 provided on the cover 50 are arranged so as to partially overlap each other except for the end portion when viewed from a direction perpendicular to the insulating wall 24. As shown in FIG. 9, the height of the non-overlapping portion of the insulating wall 24 provided on the case 14 and the insulating wall 24 provided on the cover 50 is the height difference dimension D. Since the height difference is provided on the insulating wall 24, even if the mud of the calcium chloride aqueous solution infiltrates, the mud is unlikely to accumulate on the insulating wall 24. Therefore, electrolytic corrosion caused by mud is suppressed. It is desirable that the height difference dimension D be set larger than the distance at which the adjacent insulating walls 24 are separated from each other. This is because the accumulation of mud on the insulating wall 24 is further suppressed.

In FIG. 9, the height of the insulating wall 24 provided on the case 14 is set to be higher than the height of the insulating wall 24 provided on the cover 50, but the configuration of the insulating wall 24 is not limited to this. The height of the insulating wall 24 provided on the cover 50 may be higher than the height of the insulating wall 24 provided on the case 14.

As described above, in the rotary electric machine 1 for a vehicle according to the third embodiment, the insulating wall 24 provided on the case 14 and the insulating wall 24 provided on the cover 50 are arranged so as to partially overlap each other except for the end portion. Therefore, even if an aqueous solution containing mud having a high viscosity coefficient penetrates into the rotary electric machine 1 for a vehicle, the mud is unlikely to be deposited on the insulating wall 24, so that electrolytic corrosion caused by the mud can be suppressed. .. When the height of the non-overlapping portion of the insulating wall 24 provided on the case 14 and the insulating wall 24 provided on the cover 50 is larger than the distance between the adjacent insulating walls 24, the mud insulating wall Accumulation on 24 can be further suppressed.

Embodiment 4.
The rotary electric machine 1 for a vehicle according to the fourth embodiment will be described. FIG. 10 is a perspective view of a part of the vehicle rotary electric machine 1 on the rear side. In FIG. 10, the cover 50 shows only the side surfaces surrounding the inverter assembly 30. The vehicle rotary electric machine 1 according to the fourth embodiment has a configuration in which the exhaust port 41 of the rear bracket 5 and the insulating wall 24 are arranged close to each other.

When the centrifugal fan 21 on the rear side is driven, the intake air is taken from the intake port 50a in the direction of the rotation shaft 11 of the centrifugal fan 21, and the exhaust air is performed through the plurality of exhaust ports 41 provided on the rear bracket 5. .. A plurality of exhaust ports 41 are provided on the side of the rear bracket 5 facing the inverter assembly 30. The exhaust port 41 is provided on the insulating wall 24, the AC terminal 14a, and the rear bracket 5 facing the ground terminal 14b. Even if there is water in the vicinity of the insulating wall 24, the water is efficiently scattered and volatilized by the exhaust gas, so that the accumulated water in the vicinity of the insulating wall 24 is suppressed.

As described above, in the rotary electric machine 1 for a vehicle according to the fourth embodiment, since the exhaust port 41 is provided on the insulating wall 24, the AC terminal 14a, and the rear bracket 5 facing the ground terminal 14b, the exhaust port 41 By the exhaust from the air, the water infiltrated in the vicinity of the insulating wall 24 can be efficiently scattered and volatilized, so that electrolytic corrosion can be further suppressed.

The present application also describes various exemplary embodiments and examples, although the various features, embodiments, and functions described in one or more embodiments are those of a particular embodiment. It is not limited to application, but can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1 Slip ring for vehicles, 2 rotors, 2a field windings, 2b field iron cores, 3 stators, 3a three-phase stator windings, 3b stator outlet wires, 4 front brackets, 5 rear brackets, 5a bosses, 6 magnetic pole position detection sensor, 6a sensor stator, 6b sensor rotor, 7 bearings, 8 bearings, 9 power modules, 9a terminals, 9b constrictions, 10 field modules, 11 rotors, 12 pulleys, 13 slip rings, 14 cases , 14a AC terminal, 14b ground terminal, 14c AC terminal, 15 heat sink, 16 brush holder, 16a brush, 17 control module, 18 connecting board, 19 terminal, 19a motor side terminal, 19b inverter assembly side terminal, 20 centrifugal fan, 21 Centrifugal fan, 22 screws, 23 screws, 24 insulation wall, 25 resin, 26 spaces, 30 inverter assembly, 40 motors, 41 exhaust ports, 50 covers, 50a intake ports, 60 bus bars

Claims (13)

The rotor that surrounds the axis of rotation and
With at least one centrifugal fan provided on the rotor,
A front bracket that holds one end side of the rotating shaft via a bearing and covers the front side of the rotor.
A rear bracket that holds the other end side of the rotating shaft via a bearing and covers the rear side of the rotor.
A motor unit that surrounds the rotor and has a stator provided inside the front bracket and the rear bracket, and a motor unit.
A power module connected to the motor unit that supplies armature current during driving and rectifies armature current during power generation.
A field module that is connected to the motor unit and controls the field current,
A control module that controls the power module and the field module, and
A case surrounding the power module, the field module, and the control module,
An inverter assembly provided in contact with the power module, having a heat sink for cooling the power module, and provided on the side of the rear bracket of the motor unit.
A rotary electric machine for a vehicle provided with a cover surrounding the inverter assembly.
A plate electrically connected to the power module, protruding from the case, and provided between adjacent first and second terminals having a potential difference, and between the first terminal and the second terminal. A space is provided around each of the first terminal and the second terminal while providing a shape-like insulating wall .
The insulating wall partitions the connecting parts attached to the first terminal and the first terminal from the connecting parts attached to the second terminal and the second terminal.
The insulating wall is provided on both the case and the cover, respectively.
A rotary electric machine for a vehicle , wherein the insulating wall provided on the case and the insulating wall provided on the cover are separated from each other. According to claim 1 , the insulating wall provided on the case and the insulating wall provided on the cover are arranged so as to be overlapped with each other when viewed from a direction perpendicular to the insulating wall. The vehicle rotating electric machine described. The insulating wall provided on the case and the insulating wall provided on the cover are characterized in that they are arranged so as to partially overlap each other except for the end portion when viewed from a direction perpendicular to the insulating wall. The rotary electric machine for a vehicle according to claim 1. A claim, wherein the height of the non-overlapping portion of the insulating wall provided on the case and the insulating wall provided on the cover is larger than the distance between the insulating walls. The rotary electric machine for a vehicle according to 3. The claim is characterized in that the insulating wall is made of a resin, the insulating wall provided in the case is integrally molded in the case, and the insulating wall provided in the cover is integrally molded in the cover. The rotary electric machine for a vehicle according to any one of claims 1 to 4. The rotary electric machine for a vehicle according to any one of claims 1 to 5 , wherein the first terminal and the second terminal are integrally molded in the case. The rotary electric machine for a vehicle according to claim 6 , wherein the first terminal and the second terminal are arranged on the same plane. The rotary electric machine for a vehicle according to claim 1, wherein one of the first terminal and the second terminal is a ground terminal. The rotating electric machine for a vehicle according to claim 1, wherein the magnetic pole position detection sensor is arranged coaxially with the rotating shaft. The rotary electric machine for a vehicle according to claim 1, wherein a brush to be slid on the slip ring provided on the rotating shaft is provided. The rotary electric machine for a vehicle according to claim 1, wherein the winding of the stator has two sets of three-phase winding groups. The rotary electric machine for a vehicle according to claim 10 , wherein the brush is arranged upward with respect to the road surface with respect to the power module. The rotary electric machine for a vehicle according to claim 1, wherein the power module having a fuse mechanism is arranged on the inner diameter side of the first terminal and the second terminal.

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