JP7019780B1 - Rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an electric component provided in a rotary electric machine and a rotary electric machine in which water is suppressed from being applied to an electric connection portion. SOLUTION: A stator having a rotating shaft, a rotor having a field core wound with a field winding and rotating integrally with the rotating shaft, and a stator core having a stator winding wound. A motor unit provided with a bracket for holding one end side and the other end side of the rotating shaft via a bearing, a power module having a switching element, a field module having a switching element, a power module, and a field module. It has a cooler for cooling the bracket, and is arranged on the other side in the axial direction of the bracket, and faces the one side in the axial direction of the control unit between the motor unit and the control unit fixed to the bracket. The packing is arranged between the control unit and the packing, and connects the electric parts electrically connected to the control unit, and the motor unit and the control unit. Covers part or all of one or both of the electrical connections. [Selection diagram] Fig. 1

Description

The present application relates to a rotary electric machine.

In recent years, there has been an increasing demand for improved fuel efficiency of transportation equipment against the backdrop of global warming. Along with this, there is an urgent need to reduce the size and weight of field winding type rotary electric machines that supply electric power consumed by vehicle electrical components and charge vehicle batteries. However, in recent years, the power consumption of vehicles has been increasing due to the increase in the number of electrical components. Therefore, rotary electric machines for vehicles are required to have a larger amount of power generation and high efficiency power generation performance. In order to meet these demands, alternators equipped with low-loss diodes or rotary electric machines for vehicles such as motor generators equipped with power conversion circuits composed of power semiconductor elements such as MOS-FETs have been developed. There is.

In particular, devices such as motor generators have a function as an electric motor for starting and assisting an engine in addition to the power generation function provided by a conventional alternator in order to further improve the fuel efficiency of an automobile.

There is a concern that the electric path of the motor generator, particularly the electrical connection such as a terminal that is not completely covered from the outside, may be flooded with muddy water or the like into the engine room in which the motor generator is arranged. When an electric motor is operated with muddy water or the like attached and a voltage is applied to an electric path, electrolytic corrosion occurs. Therefore, various efforts to improve the durability of electrical connections such as terminals against electrolytic corrosion are disclosed (for example). , Patent Document 1). In particular, in a rotary electric machine for automobiles, a rotary electric machine is provided by providing at least one axially oriented wall between the heat sink and the bearing and a deflector of a resin member that closes the space extending between the heat sink and the bearing. Prevents water from entering the inside of the.

International Publication No. 2019/025334

In the above-mentioned Patent Document 1, since the deflector is provided, it is possible to prevent the intrusion of muddy water or the like from the deflector into the inside. However, when the water adhering to the deflector flows toward the ground, there is a problem that muddy water or the like protrudes from the deflector, for example, adheres to the terminal of the electrical connection portion connecting the motor unit and the control unit.

Therefore, an object of the present application is to obtain an electric component provided in a rotary electric machine and a rotary electric machine in which water is suppressed from being applied to an electrical connection portion.

The rotary electric machine disclosed in the present application is arranged with a rotary shaft, a rotor having a field core wound with a field winding and rotating integrally with the rotary shaft, and a radial outer side of the field core. A stator having a stator core wound with a stator winding and a bracket that covers the outside of the field core and the stator core and holds one end side and the other end side of the rotating shaft via a bearing are provided. A power module having a switching element for turning on / off the supply current to the stator winding, a field module having a switching element for turning on / off the supply current to the field winding, and a power module and a field module. It has a cooler for cooling the bracket, and is arranged on the other side in the axial direction of the bracket, and faces the one side in the axial direction of the control unit between the motor unit and the control unit fixed to the bracket. The packing is provided between the control unit and the packing, and the packing is arranged between the control unit and the packing, and a part or all of the electric parts electrically connected to the control unit, the motor unit and the control unit. A device that covers a part or all of the electrical connection part connecting with and a part or all of the other side surface of the bracket in the axial direction, and has an annular plate-like part extending at least in the radial direction and the circumferential direction. Is.

According to the rotary electric machine disclosed in the present application, the packing made of an insulator, which is arranged between the motor unit and the control unit, is arranged between the control unit and the packing and is electrically connected to the control unit. It was caused by the electric parts provided by the rotary electric machine and muddy water to the electric connection part in order to cover one or all of the electric parts and the electric connection part connecting the motor part and the control part. Water exposure can be suppressed.

It is sectional drawing which shows the outline of the rotary electric machine which concerns on Embodiment 1. FIG. It is a top view which shows one side in the axial direction of the rear bracket of the rotary electric machine which concerns on Embodiment 1. FIG. It is sectional drawing explaining the connection of the stator of the rotary electric machine which concerns on Embodiment 1, and the control part. It is a top view which shows the other side in the axial direction of the packing of the rotary electric machine which concerns on Embodiment 1. FIG. It is a main part plan view of the rear bracket of the rotary electric machine which concerns on Embodiment 1. FIG. It is a main part plan view of the rear bracket of another rotary electric machine which concerns on Embodiment 1. FIG. It is a top view which shows the rear side of the control part of the rotary electric machine which concerns on Embodiment 2. FIG. It is a top view of the main part of the electric connection part of the rotary electric machine which concerns on Embodiment 2. FIG. It is sectional drawing of the main part of the electrical connection part cut at the cross-sectional position AA of FIG. It is a main part plan view of the electric connection part of another rotary electric machine which concerns on Embodiment 2. FIG. It is a main part plan view of the electric connection part of another rotary electric machine which concerns on Embodiment 2. FIG. It is a main part plan view of the electric connection part of the rotary electric machine which concerns on Embodiment 3. FIG.

Hereinafter, the rotary electric machine 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.
1 is a cross-sectional view showing an outline of the rotary electric machine 1 according to the first embodiment, FIG. 2 is a plan view showing one side of the rear bracket 5 of the rotary electric machine 1 in the axial direction, and FIG. 3 is a stator 3 of the rotary electric machine 1. 4 is a sectional view illustrating the electrical connection between the control unit 40 and the control unit 40, FIG. 4 is a plan view showing the other side of the packing 50 of the rotary electric machine 1 in the axial direction, and FIG. 5 is surrounded by a broken line of the rear bracket 5 shown in FIG. An enlarged plan view of the main part, FIG. 6 shows a portion equivalent to the portion surrounded by the one-point chain line of the rear bracket 5 shown in FIG. 2 in another rotary electric machine 1 according to the first embodiment. It is an enlarged plan view of a main part. The rotary electric machine 1 is a rotary electric machine 1 integrated with a control device including a motor unit 30 and a control unit 40. The motor unit 30 has a rotor 2 and a stator 3 and operates as an electric motor for driving an internal combustion engine (not shown). Alternatively, the motor unit 30 functions as a generator that is driven by an internal combustion engine to generate electricity. The control unit 40 is arranged side by side with the motor unit 30 on the other side of the motor unit 30 in the axial direction, and controls the electric power supplied to the motor unit 30. The control unit 40 is fixed to the motor unit 30, and the motor unit 30 and the control unit 40 are integrated. The rotary electric machine 1 includes a packing 50 between the motor unit 30 and the control unit 40. Although the rotary electric machine 1 with an integrated control device described in the first embodiment shows a motor generator, it can also be applied to a rotary electric machine for vehicles.

<Motor unit 30>
The motor unit 30 accommodates the rotating shaft 11, the rotor 2 that rotates integrally with the rotating shaft 11, the stator 3 arranged outside the rotor 2, and rotatably holds the rotating shaft 11. Equipped with a bracket.

The rotor 2 has a field winding 2a and a field core 2b around which the field winding 2a is wound. The stator 3 arranged radially outside the field core 2b has a multi-phase stator winding 3a and a stator core 3b around which the stator winding 3a is wound. The multi-phase stator winding 3a is, for example, one set of three-phase windings or two sets of three-phase windings, but is not limited thereto, and is set according to the type of rotary electric machine. The bracket covers the outside of the field core 2b and the stator core 3b. The bracket includes a front bracket 4 and a rear bracket 5. The front bracket 4 holds one end side of the rotating shaft 11 via the bearing 7 and covers the front side which is one side of the rotor 2 and the stator 3. The rear bracket 5 holds the other end side of the rotating shaft 11 via the bearing 8 and covers the rear side which is the other side of the rotor 2 and the stator 3. As shown in FIG. 2, the rear bracket 5 includes an intake port 5b that penetrates the wall on the other side in the axial direction of the rear bracket 5. The front bracket 4 and the rear bracket 5 are arranged at intervals in the axial direction and are connected by bolts 5a.

The rotary shaft 11 includes a pulley 12 at one end of the rotary shaft 11 protruding from the through hole of the front bracket 4. The pulley 12 transfers torque in both directions between the rotor 2 and an external internal combustion engine (not shown). The pulley 12 and the internal combustion engine are connected via a belt (not shown). The rotary shaft 11 is provided with a slip ring 13 on the other end side of the rotary shaft 11 protruding from the through hole of the rear bracket 5. The slip ring 13 and the field winding 2a are electrically connected, and a field current is supplied from the slip ring 13 to the field winding 2a. The brush 16 on which the slip ring 13 is slid to supply a current to the field winding 2a is held by the brush holder 16a. The brush holder 16a is arranged in a space through which the rotating shaft 11 provided in the center of the control unit 40 penetrates after the control unit 40 before the rear cover 15 is attached is attached to the motor unit 30. The brush holder 16a is fixed to the control unit 40.

The air cooling fan 20 is fixed to the front end surface of the field core 2b of the rotor 2. The air cooling fan 21 is fixed to the rear end surface of the field core 2b of the rotor 2. The air-cooling fan 20 and the air-cooling fan 21 rotate integrally with the rotor 2. Cooling air is generated as the air-cooling fan 20 and the air-cooling fan 21 rotate to cool the inside of the bracket. The cooling air passes through the intake port 5b. Further, a gap serving as a cooling gas passage is provided between the control unit 40 and the rear bracket 5, between the control unit 40 and the packing 50, and between the motor unit 30 and the packing 50. Further, the rotary electric machine 1 is provided with a gap that serves as an axial cooling gas passage from between the case 14 and the brush 16 toward the intake port 5b. The cooling air passes through these cooling gas passages and cools the cooler 35 and the motor unit 30 of the control unit 40.

The magnetic pole position detection sensor 6 is composed of a sensor stator 6a and a sensor rotor 6b. The rotary shaft 11 includes a sensor rotor 6b between the slip ring 13 and the bearing 8 on the other end side of the rotary shaft 11 protruding from the rear bracket 5. The sensor rotor 6b rotates integrally with the rotating shaft 11 and is formed of an iron core. The sensor stator 6a is arranged coaxially with the sensor rotor 6b and is provided on the heat transfer member 31 of the control unit 40. The magnetic pole position detection sensor 6 detects the magnetic pole position of the rotating shaft 11, that is, the rotor 2 from the position of the sensor rotor 6b.

<Control unit 40>
The control unit 40 includes a power module 9 and a field module (not shown) that supply electric power to the motor unit 30, a control module 17 that controls the power module 9 and the field module, and a power module 9 and a field module. It includes a cooler 35 for cooling, a case 14 provided with a terminal 14a for electrically connecting the power module 9 and the motor unit 30, and a rear cover 15 for covering these members from the rear side and the radial outside. The control unit 40 is arranged on the other side of the rear bracket 5 in the axial direction and is fixed to the rear bracket 5. Further, a filter coil 10 and an input capacitor (not shown) are located between the vehicle battery arranged outside the rotary electric machine 1 and the terminal for connecting the power system terminal provided in the power module 9 and the field module. Is electrically connected. The filter coil 10 is provided in the case 14, and the input capacitor is attached to the filter coil 10 and the heat transfer member 31 with screws.

The power module 9 includes a switching element and a peripheral circuit. The switching element is arranged on a lead frame forming an electric wiring, and is sealed with a resin material together with a peripheral circuit. As shown in FIG. 3, the power module 9 is connected to the stator lead wire 3c via the terminal 14a and the terminal 19. The AC terminal 9a, the ground terminal (not shown), the input terminal 9b, and the control terminal 9c included in the power module 9 are provided so as to be exposed from the resin material. When the switching element is driven, the supply current from the DC power supply to the stator winding 3a is turned on and off, and the stator current is supplied to the stator winding 3a. The switching element rectifies the stator current during power generation.

The field module includes a switching element and a peripheral circuit. The field module is connected to the field winding 2a via the brush 16 and the slip ring 13. The switching element is arranged on a lead frame forming an electric wiring, and is sealed with a resin material together with a peripheral circuit. The switching element controls the field current by turning on and off the supply current to the field winding 2a.

The control module 17 includes a control circuit that controls the power module 9 and the field module. The control module 17 is provided, for example, on a substrate on which electronic components are mounted. The control module 17 is arranged on the other side in the axial direction from the power module 9 and the field module at a distance from the power module 9 and the field module. The control terminal 9c of the power module 9 is connected to the control module 17. The signal wiring of the magnetic pole position detection sensor 6 is connected to the control module 17.

The cooler 35 includes a heat transfer member 31, a lid member 32, and a refrigerant input / output pipe 33 which is a refrigerant supply / discharge unit. A power module 9 and a field module are thermally connected to the heat transfer member 31 on the other side surface in the axial direction, and a flow path groove portion 31a recessed on the other side in the axial direction is provided on one surface in the axial direction. It is formed. The plate-shaped lid member 32 is provided so as to close the opening on one side in the axial direction of the flow path groove portion 31a. The heat transfer member 31 and the lid member 32 are made of a metal material such as aluminum. The lid member 32 is fixed to the heat transfer member 31 by a screw 34. The refrigerant input / output pipe 33 is provided on the side surface of the heat transfer member 31, and supplies and discharges the refrigerant to the flow path 36 surrounded by the flow path groove portion 31a and the lid member 32. As the refrigerant, for example, water, antifreeze liquid, or ethylene glycol liquid is used. The heat transfer member 31 is cooled by the refrigerant.

The case 14 is provided so as to surround the power module 9, the field module, and the control module 17 from the outside in the radial direction. The case 14 is made of a resin material having an insulating property. The resin material is, for example, polyphenylene sulfide. As shown in FIG. 3, the case 14 includes a terminal 14a that is electrically connected to the power module 9 on the other end side and has one end side protruding from the case 14. The terminal 14a is a terminal for connecting the power module 9 and the motor unit 30. The terminal 14a is integrally insert-molded into the case 14.

<Connection configuration of stator 3 and control unit 40>
The configuration of the electrical connection between the stator 3 and the control unit 40 will be described. As shown in FIG. 3, the rotary electric machine 1 includes a connecting board 18 which is an electrical connection unit for connecting the motor unit 30 and the control unit 40. The connecting board 18 is a board in which a terminal 19 for electrically connecting the stator 3 and the control unit 40 is insert-molded into the terminal portion 18a. The connecting board 18 is provided between the control unit 40 and the rear bracket 5, and is fixed to the rear bracket 5 with screws (not shown).

The stator lead wire 3c is an end portion of the stator winding 3a. The stator lead wire 3c penetrates the rear bracket 5 and is connected to the terminal 19 by welding at a connection point 19a on one end side of the terminal 19 provided on the connecting board 18. After this connection, the control unit 40 before attaching the rear cover 15 is attached to the rear side of the rear bracket 5 in the axial direction via the packing 50. One end side of the terminal 14a provided in the case 14 is connected to the terminal 19 by a screw 19c at the connection point 19b on the other end side of the terminal 19. The AC terminal 9a of the power module 9 and the other end side of the terminal 14a are joined by welding or the like. The ground terminal of the power module 9, which is not shown in FIG. 3, is fixed to the heat transfer member 31 with a screw (not shown). The ground terminal and the heat transfer member 31 are electrically connected, and the heat transfer member 31 becomes a ground.

<Packing 50>
The packing 50, which is a main part of the present application, will be described. The packing 50 is arranged between the motor unit 30 and the control unit 40 so as to face one side in the axial direction of the control unit 40. The packing 50 suppresses water damage caused by muddy water or the like to the electric parts provided in the rotary electric machine 1 and the electrical connection portion. The packing 50 made of an insulator is formed of, for example, a rubber member or a silicon rubber member. When the packing 50 is made of a rubber member, the packing 50 can be easily arranged without a gap at the contact points between the motor unit 30 and the control unit 40 and the packing 50. Further, the waterproof property between the motor unit 30 and the control unit 40 can be improved at the contact points between the motor unit 30 and the control unit 40 and the packing 50. When the packing 50 is made of a silicon rubber member, the packing 50 does not have a problem due to melting or the like even in the rotary electric machine 1 for a vehicle arranged in a high temperature environment. Therefore, the packing 50 can be used stably for a long period of time in the rotary electric machine 1. When a rubber member is used for the packing 50, it is desirable that the durometer hardness of the rubber member is 70 or more. When the durometer hardness of the rubber member is 70 or more, the packing 50 can be stably handled with one hand, so that the assembleability of the rotary electric machine 1 can be improved. When the hardness of the rubber member is low, when the operator holds one side of the packing, the other side of the packing is lowered by gravity and deformed, which makes it difficult to handle the packing with one hand.

The packing 50 is arranged between the control unit 40 and the packing 50, and is an electrical component electrically connected to the control unit 40 and a connecting board which is an electrical connection unit for connecting the motor unit 30 and the control unit 40. Covers part or all of one or both of 18. The electrical components in the present embodiment are the magnetic pole position detection sensor 6, the filter coil 10, and the input capacitor, but the electrical components electrically connected to the control unit 40 are not limited to these. As shown in FIG. 4, a wall portion 50a is provided on the packing 50 so as to surround the through hole in which the rotating shaft 11 is arranged. As shown in FIG. 3, since the magnetic pole position detection sensor 6 is arranged in the through hole portion of the packing 50, the wall portion 50a covers the magnetic pole position detection sensor 6. Further, the packing 50 is provided with a wall portion 50b that covers the filter coil 10 and a wall portion 50c that covers the connection portion between the input capacitor and the case 14 by screwing. The filter coil 10 is arranged at the broken line portion shown inside the wall portion 50b in FIG. The input capacitor is arranged in the broken line portion including the inside of the wall portion 50c in FIG. As shown in FIG. 1, a wall portion 50b covers a part of the filter coil 10.

As shown in FIGS. 1 and 3, a part of the connecting board 18 is covered with one side of the packing 50 in the axial direction. As shown in FIG. 3, the packing 50 is provided with a recess so as to cover the connection portion 19a between the stator lead wire 3c and the terminal 19 and to be in close contact with the heat transfer member 31, but for the sake of simplicity, FIG. In 4, the recess is omitted. In the present embodiment, the packing 50 covers a part of both the electric component and the electrical connection portion, but the packing 50 may cover either one of them. Further, the packing 50 may cover all of the electrical components and the electrical connection portions. Further, the electrical connection portion is not limited to the connecting board 18, and the packing 50 may cover the electrical connection portion without using the connecting board 18.

According to this configuration, the electrical components arranged between the control unit 40 and the packing 50 and the electrical connection portion connecting the motor unit 30 and the control unit 40 are covered with the packing 50, so that the electrical components and electricity are covered. It is possible to suppress water damage caused by muddy water or the like to the target connection portion. Since water coverage on the electrical components and the electrical connection portion is suppressed, it is possible to suppress the occurrence of electrolytic corrosion caused by the water coverage on the electrical components and the electrical connection portion. Further, by providing the packing 50, it is possible to insulate and insulate between the motor unit 30 and the control unit 40.

The packing 50 is at least an electric component, an electrical connection portion, a component provided in a portion of a control unit 40 facing the packing 50, and a component provided in a portion of a motor unit 30 facing the packing 50. It is in close contact with one and is sandwiched and fixed between the motor unit 30 and the control unit 40. In the present embodiment, as shown in FIG. 3, the packing 50 is in close contact with the magnetic pole position detection sensor 6 which is an electric component at the wall portion 50a. Further, the packing 50 is in close contact with the connecting board 18 which is an electrical connection portion on one side in the axial direction of the packing 50. Further, the packing 50 is in close contact with the cooler 35, which is a component provided in the portion of the control unit 40 facing the packing 50, on the other side in the axial direction of the packing 50. Further, the packing 50 is in close contact with the rear bracket 5, which is a component provided in the portion of the motor portion 30 facing the packing 50, on one side in the axial direction of the packing 50.

According to this configuration, the packing 50 is not fixed to the rotary electric machine 1 by using other parts such as screws, but the packing 50 is sandwiched and fixed between the motor unit 30 and the control unit 40. Since the attachment of the packing 50 to the rotary electric machine 1 is simplified, the rotary electric machine 1 can be easily assembled. Further, since the packing 50 is sandwiched between the motor unit 30 and the control unit 40, the vibration resistance of the rotary electric machine 1 can be improved. Further, it is possible to prevent the intrusion of muddy water or the like from between the motor unit 30 and the control unit 40. The fixing of the packing 50 is not limited to this, and may be fixed by adhering to one or both of the motor unit 30 and the control unit 40, for example.

The packing 50 includes a through hole 50d. The through hole 50d communicates with the intake port 5b that penetrates the wall on the other side in the axial direction of the rear bracket 5 facing the packing 50. Since the through hole 50d communicates with the intake port 5b, the through hole 50d becomes a part of the cooling gas passage. By forming the cooling gas passage, the air volume of the cooling air flowing through the motor unit 30 can be increased, and the cooling performance of the motor unit 30 can be improved. Further, since the cooling air comes into contact with the control unit 40 through the through hole 50d, the cooling performance of the control unit 40 can be improved. Even if water is generated in the cooling gas passage due to muddy water or the like, the packing 50 covers the electrical parts and the electrical connection portion, so that the electrical parts and the electrical connection portion are prevented from being electrolytically corroded.

As shown in FIG. 6, a plurality of grid-shaped fins 5e may be formed in the intake port 5b of the rear bracket 5. By forming the fins 5e, the cooling property of the cooling air in the cooling gas passage is improved, so that the cooling property of the motor unit 30 and the control unit 40 can be improved.

<Drainage port 5c>
In a state where the rotary electric machine 1 is fixed to an external fixing member, the axes of the rotary shaft 11 intersect in the vertical direction, and the rear bracket 5 is the inner peripheral surface 5d of the rear bracket 5 with which the outer peripheral surface of the stator 3 abuts. At least one drain port 5c communicating with the outside is provided on the side wall portion on the other side in the axial direction of the rear bracket 5 which is radially outer and lower in the vertical direction than the portion. The drainage port 5c is provided at a position in the ground direction of the rotary electric machine 1. In FIG. 5, the portion shown by the broken line is the inner peripheral surface 5d of the rear bracket 5 with which the outer peripheral surface of the stator 3 abuts. In the present embodiment, as shown in FIG. 2, an example in which the rear bracket 5 is provided with two drainage ports 5c is shown, but the number of drainage ports 5c is not limited to this, and one or three or more drainage ports are used. It doesn't matter if there is. Further, the arrangement of the drainage port 5c is not limited to the rear bracket 5, and the drainage port 5c may be further provided on the front bracket 4.

The drainage port 5c is a through hole for draining the water that has entered the inside of the bracket to the outside. The location where the drainage port 5c is arranged is a portion where at least a part of the drainage port 5c is radially outside the portion of the inner peripheral surface 5d, and is a portion below the vertical direction. When water enters the inside of the bracket, the water goes to the place where the drainage port 5c is arranged, but the water is discharged to the outside from the drainage port 5c without contacting the stator 3 and accumulating water. .. Therefore, it is possible to prevent water from being received by the accumulated water inside the bracket of the stator 3, which is an electric component provided in the rotary electric machine 1, and prevent electrolytic corrosion of the stator 3.

The relationship between the packing 50 and the drain port 5c of the rear bracket 5 will be described. Since the packing 50 is provided, the electric parts covered with the packing 50 and the electric connection portion are suppressed from being flooded, but the muddy water or the like adhering to the packing 50 in the cooling gas passage or the like is directed from the packing 50 to the ground. To be guided to. Muddy water or the like guided toward the ground may enter the inside of the motor portion 30 from the intake port 5b of the rear bracket 5. Since the rear bracket 5 is provided with a drainage port 5c, muddy water or the like that has entered the inside of the motor unit 30 is discharged to the outside from the drainage port 5c without collecting water. Therefore, water exposure to the stator 3 provided by the rotary electric machine 1 due to muddy water or the like adhering to the packing 50 is suppressed, and electrolytic corrosion of the stator 3 can be prevented. Further, since the packing 50 is formed with a through hole 50d and the packing 50 is a part of the cooling gas passage, the water covered with the packing 50 is scattered by the cooling air, and the water is covered from the packing 50 toward the ground. Induction is promoted.

As described above, in the rotary electric machine 1 according to the first embodiment, the packing 50 arranged between the motor unit 30 and the control unit 40 and made of an insulator is arranged between the control unit 40 and the packing 50. An electric component provided in the rotary electric machine 1 to cover a part or all of an electric component electrically connected to the control unit 40 and one or both of the electrical connection unit connecting the motor unit 30 and the control unit 40. , And water damage caused by muddy water to the electrical connection can be suppressed. Since water coverage on the electrical components and the electrical connection portion is suppressed, it is possible to suppress the occurrence of electrolytic corrosion caused by the water coverage on the electrical components and the electrical connection portion. Further, the packing 50 is provided in an electric component, an electrical connection portion, a component provided in a portion of a control unit 40 facing the packing 50, and a component provided in a portion of a motor unit 30 facing the packing 50. When the packing 50 is sandwiched and fixed between the motor unit 30 and the control unit 40 in close contact with at least one of the packings 50, the mounting of the packing 50 to the rotary electric machine 1 is simplified, so that the rotary electric machine 1 can be easily installed. Can be assembled.

The portion of the side wall on the other side in the axial direction of the rear bracket 5 which is radially outer and vertically lower than the portion of the inner peripheral surface 5d of the rear bracket 5 with which the outer peripheral surface of the stator 3 abuts. In addition, when at least one drain port 5c that communicates with the outside is provided, water that has entered the inside of the bracket due to water cover or the like adhering to the packing 50 does not come into contact with the stator 3 and accumulate. Since the water is discharged to the outside from the drain port 5c, water reception due to the accumulated water inside the bracket of the stator 3 provided in the rotary electric machine 1 is suppressed, and electrolytic corrosion of the stator 3 can be prevented. Further, when the through hole 50d of the packing 50 communicates with the intake port 5b of the rear bracket 5 facing the packing 50, the through hole 50d becomes a part of the cooling gas passage, so that the motor unit 30 and the control unit The cooling property of 40 can be improved. Further, since the water covered with the packing 50 is scattered by the cooling air, it is possible to promote the guidance of the water covered with the packing 50 from the packing 50 toward the ground.

When a plurality of grid-shaped fins 5e are formed in the intake port 5b of the rear bracket 5, the cooling property of the cooling air in the cooling gas passage is improved, so that the cooling property of the motor unit 30 and the control unit 40 is improved. Can be done. Further, when the packing 50 is made of a rubber member, the packing 50 can be easily arranged without a gap at the contact point between the motor unit 30 and the control unit 40 and the packing 50, so that the packing 50 can be controlled with the motor unit 30 of the rotary electric machine 1. It is possible to improve the waterproofness between the parts 40 and the parts 40. Further, when the packing 50 is made of a silicon rubber member, the packing 50 does not have a problem due to melting or the like even in the rotary electric machine 1 for a vehicle arranged in a high temperature environment, so that the packing 50 is stable for a long period of time. Can be used for the rotary electric machine 1. Further, when the durometer hardness of the packing 50 made of a rubber member is 70 or more, the packing 50 can be stably handled with one hand, so that the assembling property of the rotary electric machine 1 can be improved.

Embodiment 2.
The rotary electric machine 1 according to the second embodiment will be described. FIG. 7 is a plan view showing the rear side of the control unit 40 from which the rear cover 15 of the rotary electric machine 1 according to the second embodiment is removed, and FIG. 8 is surrounded by a broken line of the electrical connection portion of the rotary electric machine 1 shown in FIG. A plan view of the main part shown in an enlarged manner, FIG. 9 is a cross-sectional view of the main part of the electrical connection portion cut at the AA cross-sectional position of FIG. 8, and FIG. 10 is another rotary electric machine according to the second embodiment. 1 is a plan view of a main part of the electrical connection portion, and FIG. 11 is a plan view of the main part of the electrical connection portion of another rotary electric machine 1 according to the second embodiment. The rotary electric machine 1 according to the second embodiment has a configuration in which a rib 18b is provided on a terminal portion 18a of a connecting board 18 which is an electrical connection portion. In FIG. 7, the rib 18b is omitted for the sake of simplicity.

As shown in FIG. 9, the connecting board 18 includes a terminal portion 18a that extends the radially outer side of the packing 50 to one side in the axial direction and is electrically connected to the control portion 40 by a screw 19c. A terminal 19 that electrically connects the stator 3 and the terminal 14a of the control unit 40 is insert-molded into the terminal portion 18a. In the present embodiment, since the rotary electric machine 1 includes a plurality of power modules 9, as shown in FIG. 7, a plurality of terminal portions 18a are provided on the radial outer side of the control unit 40. The power module 9, the field module, and the control module 17 included in the control unit 40 are sealed with the mold resin 41. As shown in FIG. 8, around the screw hole of the terminal portion 18a, a rib 18b that surrounds the entire screw hole except for the terminal portion 14a is formed on the connecting board 18. Since the connecting board 18 is provided with ribs 18b surrounding the terminals 14a and terminals 19 and the screws 19c, which are electrical connection points exposed to the outside, it is possible to suppress water damage to the electrical connection parts due to muddy water or the like. can. Since water exposure to the electrical connection portion is suppressed, it is possible to suppress the occurrence of electrolytic corrosion caused by water reception at the electrical connection portion. Although the rib 18b is provided in FIG. 8 to surround the entire circumference of the screw hole of the terminal portion 18a, the present invention is not limited to this configuration, and for example, the rib 18b is provided only in a part of the direction where water is a concern. But it doesn't matter.

As shown in FIG. 10, the resin 18c may be filled in the electrical connection portion exposed to the outside of the screw 19c and the terminal portion 18a inside the rib 18b. By filling the inside of the rib 18b with the resin 18c, it is possible to further suppress water damage caused by muddy water or the like to the electrical connection portion. Further, since the range in which the resin 18c is filled is defined by the rib 18b, the workability of filling the resin 18c can be improved. Further, when the mold resin 41 and the resin 18c are made of the same material, the productivity of the rotary electric machine 1 can be improved.

As shown in FIG. 11, an insulating coating 18d may be applied to the electrical connection portion exposed to the outside of the screw 19c and the terminal portion 18a inside the rib 18b. The portion shown by the diagonal line in FIG. 11 indicates the portion where the coating film 18d is applied. By applying the coating material 18d to the inside of the rib 18b, it is possible to further suppress water damage caused by muddy water or the like to the electrical connection portion. Further, since the range in which the coating 18d is applied is defined by the rib 18b, the workability of applying the coating 18d can be improved.

As described above, in the rotary electric machine 1 according to the second embodiment, since the rib 18b surrounding a part or all of the screw hole of the terminal portion 18a is formed on the connecting board 18, muddy water to the electrical connection portion is formed. It is possible to suppress water damage caused by such factors. Since water exposure to the electrical connection portion is suppressed, it is possible to suppress the occurrence of electrolytic corrosion caused by water reception at the electrical connection portion. Further, when the resin 18c is filled in the electrical connection portion exposed to the outside of the screw 19c and the terminal portion 18a inside the rib 18b, water exposure due to muddy water or the like to the electrical connection portion is further suppressed. Can be done. Further, when the coating 18d is applied to the electrical connection portion exposed to the outside of the screw 19c and the terminal portion 18a inside the rib 18b, water exposure due to muddy water or the like to the electrical connection portion is further suppressed. Can be done.

Embodiment 3.
The rotary electric machine 1 according to the third embodiment will be described. FIG. 12 is a plan view of a main part of the electrical connection portion of the rotary electric machine 1 according to the third embodiment, and the position equivalent to the portion surrounded by the broken line of the electrical connection portion of the rotary electric machine 1 shown in FIG. 7 is enlarged. It is a figure shown by. The rotary electric machine 1 according to the third embodiment has a configuration in which plating 18e is provided at an electrically connecting portion exposed to the outside of a connecting board 18 which is an electrical connecting portion.

The terminal 14a and the terminal 19 which are the electrical connection points exposed to the outside of the screw 19c and the terminal portion 18a are plated with corrosion-resistant plating 18e. The portion shown by the diagonal line in FIG. 12 indicates the portion where the plating 18e has been applied.

As described above, in the rotary electric machine 1 according to the third embodiment, the terminal 14a and the terminal 19 which are the electrical connection points exposed to the outside of the screw 19c and the terminal portion 18a are plated with corrosion-resistant plating 18e. Therefore, it is possible to suppress water damage caused by muddy water or the like to the electrical connection portion. Since water exposure to the electrical connection portion is suppressed, it is possible to suppress the occurrence of electrolytic corrosion caused by water reception at the electrical connection portion.

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 Rotor, 2 Rotor, 2a Field winding, 2b Field core, 3 Stator, 3a Stator winding, 3b Stator core, 3c Stator lead wire, 4 Front bracket, 5 Rear bracket, 5a Bolt 5b Intake port, 5c Drain port, 5d Inner peripheral surface, 5e fin, 6 pole position detection sensor, 6a sensor stator, 6b sensor rotor, 7 bearings, 8 bearings, 9 power modules, 9a AC terminal, 9b input terminal, 9c Control terminal, 10 filter coil, 11 rotary shaft, 12 pulley, 13 slip ring, 14 case, 14a terminal, 15 rear cover, 16 brush, 16a brush holder, 17 control module, 18 connecting board, 18a terminal, 18b rib, 18c Resin, 18d coating, 18e plating, 19 terminal, 19a connection point, 19b connection point, 19c screw, 20 air cooling fan, 21 air cooling fan, 30 motor part, 31 heat transfer member, 31a flow path groove part, 32 lid member, 33 refrigerant Input / output pipe, 34 screws, 35 cooler, 36 flow path, 40 control unit, 41 mold resin, 50 packing, 50a wall part, 50b wall part, 50c wall part, 50d through hole

Claims (13)

A rotor having a rotating shaft and a field core around which a field winding is wound and rotating integrally with the rotating shaft, and a stator arrangement arranged radially outside the field core, and a stator winding is wound. A motor unit provided with a stator having a stator core and a bracket that covers the outside of the field core and the stator core and holds one end side and the other end side of the rotation shaft via a bearing. When,
A power module having a switching element for turning on / off the supply current to the stator winding, a field module having a switching element for turning on / off the supply current to the field winding, the power module, and the field module. A control unit having a cooler for cooling, arranged on the other side of the bracket in the axial direction, and fixed to the bracket.
A packing made of an insulator, which is arranged between the motor unit and the control unit so as to face one side in the axial direction of the control unit, is provided.
The packing is arranged between the control unit and the packing, and a part or all of the electric parts electrically connected to the control unit, and an electrical connection unit connecting the motor unit and the control unit. A rotary electric machine that covers a part or all of the bracket and a part or all of the other side surface of the bracket in the axial direction, and has an annular plate-shaped part extending at least in the radial direction and the circumferential direction . One side in the axial direction of the packing portion covering the other side surface in the axial direction of the bracket abuts on the other side surface in the axial direction of the bracket, and the other side in the axial direction is spaced from the control unit. ,
The electrical connection projectes from the bracket to the other side in the axial direction.
The rotary electric machine according to claim 1, wherein a gap is provided on one side in the axial direction of the packing portion covering the protruding electrical connection portion, and the other side in the axial direction is in contact with the control portion. One portion of the control unit in the axial direction has a recess on the other side in the axial direction.
The rotary electric machine according to claim 2, wherein the tip of the electrical connection portion protruding into the recess is inserted, and the packing portion covering the protruding electrical connection portion is in contact with the inner surface of the recess. The packing is a component provided in the electric component, the electrical connection portion, a component provided in the control section facing the packing, and a motor section facing the packing. The rotary electric machine according to any one of claims 1 to 3, which is in close contact with at least one of the above and is sandwiched and fixed between the motor unit and the control unit. In a state where the rotary electric machine is fixed to an external fixing member, the axes of the rotary shaft intersect in the vertical direction.
The bracket is radially outside the portion of the inner peripheral surface of the bracket to which the outer peripheral surface of the stator abuts, and is located on the lower side in the vertical direction on the side wall on the other side in the axial direction of the bracket. The rotary electric machine according to any one of claims 1 to 4, further comprising at least one drain port for communication. A rotor having a rotating shaft and a field core around which a field winding is wound and rotating integrally with the rotating shaft, and a stator arrangement arranged radially outside the field core, and a stator winding is wound. A motor unit provided with a stator having a stator core and a bracket that covers the outside of the field core and the stator core and holds one end side and the other end side of the rotation shaft via a bearing. When,
A power module having a switching element for turning on / off the supply current to the stator winding, a field module having a switching element for turning on / off the supply current to the field winding, the power module, and the field module. A control unit having a cooler for cooling, arranged on the other side of the bracket in the axial direction, and fixed to the bracket.
A packing made of an insulator, which is arranged between the motor unit and the control unit so as to face one side in the axial direction of the control unit, is provided.
The packing is arranged between the control unit and the packing, and is one or both of an electric component electrically connected to the control unit and an electrical connection unit connecting the motor unit and the control unit. Cover part or all of
The packing has a through hole and has a through hole.
The through hole is a rotary electric machine that communicates with an intake port that penetrates the wall on the other side in the axial direction of the bracket facing the packing. The rotary electric machine according to claim 6 , wherein a plurality of grid-shaped fins are formed in the intake port. The electrical connection portion comprises a terminal portion that extends the radially outer side of the packing to one side in the axial direction and is electrically connected to the control unit by a screw.
The rotary electric machine according to any one of claims 1 to 7 , wherein a rib surrounding a part or all of the screw hole of the terminal portion is formed in the electrical connection portion. The electrical connection portion comprises a terminal portion that extends the radially outer side of the packing to one side in the axial direction and is electrically connected to the control unit by a screw.
The rotary electric machine according to any one of claims 1 to 7 , wherein the screw and the electrical connection portion exposed to the outside of the terminal portion are plated with corrosion resistance. The rotary electric machine according to claim 8 , wherein the screw and the electrical connection portion exposed to the outside of the terminal portion inside the rib are filled with resin. The rotary electric machine according to claim 8 , wherein the screw and the electrical connection portion exposed to the outside of the terminal portion on the inside of the rib are coated with an insulating coating. The rotary electric machine according to any one of claims 1 to 11 , wherein the packing is a rubber member or a silicon rubber member. The packing is made of a rubber member and is made of a rubber member.
The rotary electric machine according to claim 12 , wherein the rubber member has a durometer hardness of 70 or more.

Images