Electronically controlled motor assembly and electric drive system

Abstract

The present invention discloses an electronically controlled motor assembly, including an electronically controlled housing, a motor housing, a motor and a motor controller, wherein the motor is installed in the motor housing, and the motor controller is installed in the electronically controlled housing; the motor housing is a hollow cylindrical shape, the electronically controlled housing is arranged on one side of the axial direction of the motor housing, the electronically controlled housing includes a cover and a shell body, the shell body and the motor housing are integrally formed, the cover and the shell body are detachably connected, the shell body includes a partition, the partition divides the inner cavity of the shell body into a main cavity and a secondary cavity, the main cavity is located between the cover and the partition, the secondary cavity is located on the side facing the motor housing, the secondary cavity is connected to the inside of the motor housing, and a plug-in hole is provided on the partition; the motor includes a rotary transformer stator, and the wiring harness of the rotary transformer stator penetrates the secondary cavity; the motor controller includes an electronically controlled motor connecting copper bar, and the electronically controlled motor connecting copper bar passes through the plug-in hole and enters the secondary cavity. The present invention also discloses an electric drive system. The present invention has the advantages of high integration, compact structure and small space occupation.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to an electronically controlled motor assembly and an electric drive system. Background Art

[0002] The electric drive system is mainly composed of a motor, a motor controller and a reducer. The motor is the core of the electric drive system, responsible for converting electrical energy into mechanical energy to drive the car. The motor controller is the brain of the electric drive system, which receives instructions from the vehicle controller and controls the operating state of the motor, including speed, torque and direction. The reducer reduces the high-speed rotation of the motor through the gear set, increases the output torque, and ensures that the electric drive system operates in the high-efficiency range.

[0003] In the existing electric drive system, the motor, the motor controller and the reducer are usually separately arranged and then combined together through mechanical connection. The overall structure of the electric drive system arranged in this way is complex and occupies a large space.

[0004] Therefore, it is necessary to design an electronically controlled motor assembly and an electric drive system with high integration, compact structure and small space occupation. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an electronically controlled motor assembly and an electric drive system with high integration, compact structure and small footprint.

[0006] The technical solution of the present invention provides an electronically controlled motor assembly, comprising an electronically controlled housing, a motor housing, a motor and a motor controller, wherein the motor is installed in the motor housing, and the motor controller is installed in the electronically controlled housing;

[0007] The motor housing is a hollow cylindrical shape, the electric control housing is arranged on one side of the motor housing in the axial direction, the electric control housing comprises a cover and a shell body, the shell body is integrally formed with the motor housing, the cover is detachably connected to the shell body, the shell body comprises a partition, the partition divides the inner cavity of the shell body into a main cavity and a secondary cavity, the main cavity is located between the cover and the partition, the secondary cavity is located on the side facing the motor housing, the secondary cavity is communicated with the interior of the motor housing, and a plug hole is opened on the partition;

[0008] The motor comprises a resolver stator, and a wiring harness of the resolver stator penetrates into the auxiliary cavity;

[0009] The motor controller comprises an electric-control motor connecting copper bar, and the electric-control motor connecting copper bar passes through the plug hole and enters into the auxiliary cavity.

[0010] Furthermore, a rear cover plate is included, and a rear opening is formed on the side of the sub-cavity opposite to the cover, and the rear cover plate is used to close the rear opening.

[0011] Furthermore, the motor controller also includes a PCB board, a capacitor and a power module stacked in sequence in the main cavity, the power module is mounted on the bottom surface of the shell body, and an electrically controlled cooling circuit for cooling the power module is provided in the shell body.

[0012] Further, the shell body includes a bottom plate and a side panel, and the bottom plate is directly connected to one side of the motor housing;

[0013] The electronically controlled cooling circuit includes a liquid inlet pipe, a cooling groove and a liquid outlet pipe, wherein the cooling groove is provided on the bottom plate, the liquid inlet pipe extends from the outside of the side panel into the inside of the bottom plate and communicates with the cooling groove, and the liquid outlet pipe passes through the inside of the bottom plate from the other side of the cooling groove and communicates with the inside of the motor housing;

[0014] A plurality of heat sinks are disposed on one side of the power module. The heat sinks are inserted into the cooling grooves. The power module and the edges of the cooling grooves are sealed by a sealing ring.

[0015] Furthermore, a motor cooling circuit is provided in the motor housing, the motor cooling circuit is arranged inside the circumferential surface of the motor housing, and the electric control cooling circuit is communicated with the motor cooling circuit;

[0016] The motor cooling circuit comprises a liquid inlet and a liquid outlet, wherein the liquid inlet is directly connected to the electronically controlled cooling circuit, and the liquid outlet extends from the motor housing.

[0017] Furthermore, the motor also includes a motor stator and a motor rotor, the motor rotor is installed inside the motor stator, the motor stator is connected to the electric control motor connecting copper busbar through a flexible cable, and the flexible cable penetrates from the motor housing into the auxiliary cavity.

[0018] The present invention further provides an electric drive system, including a reducer assembly, wherein the reducer assembly includes a reducer housing and a reducer, and also includes the electronically controlled motor assembly described in any one of the above items.

[0019] Furthermore, the two electronically controlled motor assemblies are symmetrically arranged on both sides of the reducer, and the motor housing is directly connected to the reducer housing.

[0020] Furthermore, the motor housing and the reducer housing are sealed by an oil seal, a bearing installation cavity is provided on the reducer housing, a reducer bearing is installed in the bearing installation cavity, and an oil seal sealing cavity is formed between the reducer bearing and the motor.

[0021] Furthermore, a motor bearing is provided between the motor and the motor housing, and the motor bearing is a grease-lubricated bearing.

[0022] After adopting the above technical solution, the following beneficial effects are achieved:

[0023] In the present invention, the motor housing and the electronic control housing are integrated into one, and the internal structure of the housing is arranged to facilitate the electrical connection between the motor and the motor controller. The layout of the entire electronic control motor assembly is compact, the integration is high, and the space occupied is smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0025] Figure 1 is a three-dimensional diagram of an electronically controlled motor assembly in one embodiment of the present invention;

[0026] Figure 2 is an exploded view of an electronically controlled motor assembly in one embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of the interior of an electric control housing in one embodiment of the present invention;

[0028] Figure 4 is an exploded view of an electric control housing in one embodiment of the present invention;

[0029] Figure 5 is a three-dimensional diagram of a shell body in one embodiment of the present invention;

[0030] Figure 6 is an exploded view of the housing body and the power module in one embodiment of the present invention;

[0031] Figure 7 is a three-dimensional diagram of the shell body from another perspective in one embodiment of the present invention;

[0032] Figure 8 is a three-dimensional diagram of a motor stator in one embodiment of the present invention;

[0033] Fig. 9 yes Figure 8 A partial enlarged view of

[0034] Fig.10 It is a schematic diagram of the connection between the motor stator and the copper bar of the electronically controlled motor in one embodiment of the present invention;

[0035] Fig.11 is a three-dimensional diagram of an electric control cooling circuit and a motor cooling circuit in one embodiment of the present invention;

[0036] Fig.12is a schematic diagram of an electric drive system in another embodiment of the present invention;

[0037] Fig.13 It is a partial cross-sectional view of an electric drive system in another embodiment of the present invention.

[0038] Reference table of reference numerals:

[0039] Electronic control motor assembly 10:

[0040] The electric control housing 1 includes a cover 11, a housing body 12, a rear cover plate 13, a bottom plate 121, a side panel 122, a rear opening 123, a partition plate 124, a plug-in hole 125, a main cavity 12A, and a secondary cavity 12B.

[0041] Motor housing 2;

[0042] Electronically controlled cooling circuit 3: liquid inlet pipe 31, cooling tank 32, liquid outlet pipe 33, liquid drain pipe 34;

[0043] Motor cooling circuit 4: liquid inlet 41, liquid outlet 42;

[0044] Motor 5: resolver stator 51, motor stator 52, motor rotor 53, electric shaft 54, motor bearing 55, flexible cable 521, U-shaped piece 522, cable end 522A, winding end 522B;

[0045] Motor controller 6: PCB board 61, capacitor 62, power module 63, heat sink 631, electric control motor connecting copper bar 64, busbar and capacitor connecting copper bar 65;

[0046] Reducer assembly 20:

[0047] Reducer housing 7: bearing installation cavity 71, reducer bearing 72, oil seal cavity 73, plug bearing 74, sealing ring 75;

[0048] Input shaft 8. DETAILED DESCRIPTION

[0049] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0050] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a variety of structural modes and implementation modes that can be replaced by those skilled in the art can be replaced with each other. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the invention.

[0051] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0052] In some embodiments of the present invention, the electronically controlled motor assembly 10 includes an electronically controlled housing 1, a motor housing 2, a motor 5 and a motor controller 6, wherein the motor 5 is installed in the motor housing 2, and the motor controller 6 is installed in the electronically controlled housing 1;

[0053] The motor housing 2 is a hollow cylindrical shape. The electric control housing 1 is arranged on one side of the motor housing 2 in the axial direction. The electric control housing 1 includes a cover 11 and a housing body 12. The housing body 12 is integrally formed with the motor housing 2. The cover 11 and the housing body 12 are detachably connected. The housing body 12 includes a partition 124. The partition 124 divides the inner cavity of the housing body 12 into a main cavity 12A and a secondary cavity 12B. The main cavity 12A is located between the cover 11 and the partition 124. The secondary cavity 12B is located on the side facing the motor housing 2. The secondary cavity 12B is connected to the inside of the motor housing 2. The partition 124 is provided with a plug hole 125.

[0054] The motor 5 includes a resolver stator 51, and the wiring harness of the resolver stator 51 penetrates into the auxiliary cavity 12B;

[0055] The motor controller 6 includes an electric-control motor connecting copper bar 64 , and the electric-control motor connecting copper bar 64 passes through the plug hole 125 and enters into the auxiliary cavity 12B.

[0056] Specifically, Figure 1 As shown, the electronic control motor assembly 10 includes an electronic control housing 1 and a motor housing 2 , the motor 5 is installed in the motor housing 2 , the motor housing 2 is a hollow cylinder, and the electronic control housing 1 is located on one side of the motor housing 2 in the axial direction.

[0057] In this embodiment, the motor controller 6 is arranged at the axial position of the motor 5 , so that the electronically controlled motor assembly 10 is more compact and the electrical connection between the motor 5 and the internal components of the motor controller 6 is facilitated.

[0058] like Figure 2 As shown, the electric control housing 1 includes a cover 11 and a housing body 12, and the cover 11 and the housing body 12 can be detachably connected by multiple bolts or screws. The housing body 12 is used to install the motor controller 6. The housing body 12 is integrally formed with the motor housing 2. The motor 5 and the motor controller 6 are separated into two cavities by the bottom surface of the housing body 12 and are arranged separately. The motor housing 2 is installed with a rotary transformer stator 51, a motor stator 52 and a motor rotor 53.

[0059] like Figure 3-Figure 4 As shown, the shell body 12 includes a partition 124, which divides the inner cavity of the shell body 12 into a main cavity 12A and a sub-cavity 12B, wherein the main cavity 12A is located between the cover 11 and the partition 124, and the main cavity 12A is used to install the PCB board 61, capacitor 62, power module 63, electric control motor connection copper bus 64 and busbar and capacitor connection copper bus 65 of the motor controller 6, that is, the motor controller 6 is basically installed in the main cavity 12A.

[0060] like Figure 6-Figure 7 As shown, the auxiliary cavity 12B is located on the side facing the motor housing 2, and the auxiliary cavity 12B is connected to the inside of the motor housing 2, and two plug holes 125 are provided on the partition 124. One of the plug holes 125 is used for installing the power control motor connection copper bus 64.

[0061] like Fig.10 As shown, the flexible cable 521 of the motor stator 52 passes through the motor housing 2 and enters the auxiliary cavity 12B, and is connected to the electric control motor connection copper bar 64. Another plug hole 125 is provided for installing a connection terminal, which is used to connect to the cable of the resolver stator 51.

[0062] Therefore, by setting the internal structure of the electronic control housing 1 and the motor housing 2, the electrical connection between the motor 5 and the motor controller 6 is achieved, and the structure of the entire electronic control motor assembly 10 is more compact, the layout is reasonable, and the space occupied is smaller.

[0063] Furthermore, if Figure 6 As shown, a rear cover plate 13 is further included. A rear opening 123 is opened on the side of the auxiliary cavity 12B opposite to the cover 11 , that is, on the side facing the motor housing 2 . The rear cover plate 13 is used to close the rear opening 123 .

[0064] The arrangement of the sub-cavity 12B and the rear opening 123 facilitates the electrical connection between the motor 5 and the motor controller 6, and also facilitates the later maintenance. After the wiring harness and the copper bar are connected, the rear cover plate 13 is connected to the rear opening 123 by bolts.

[0065] Furthermore, if Figure 2 and Fig.11 As shown, the motor controller 6 also includes a PCB board 61, a capacitor 62 and a power module 63 stacked in sequence in the main cavity 12A. The power module 63 is installed on the bottom surface of the shell body 12, and an electrically controlled cooling circuit 3 for cooling the power module 63 is provided in the shell body 12.

[0066] Specifically, the power module 63 is tightly connected to the bottom surface of the shell body 12, and an electric control cooling circuit 3 is provided inside the shell body 12. When the power module 63 is working, it will generate heat. When the temperature is high, it will affect the normal operation of the motor controller 6, so it is necessary to cool the power module 63. The coolant flows into the electric control cooling circuit 3, and when passing through the power module 63, the power module 63 is cooled and the heat is taken away, thereby ensuring the normal operation of the motor controller 6.

[0067] Furthermore, if Figure 5 As shown, the housing body 12 includes a bottom plate 121 and a side panel 122 , and the bottom plate 121 is directly connected to one side of the motor housing 2 ;

[0068] like Figure 4 and Fig.11 As shown, the electronically controlled cooling circuit 3 includes a liquid inlet pipe 31, a cooling groove 32 and a liquid outlet pipe 33. The cooling groove 32 is provided on the bottom plate 121. The liquid inlet pipe 31 extends from the outside of the side panel 122 into the inside of the bottom plate 121 and communicates with the cooling groove 32. The liquid outlet pipe 33 passes through the inside of the bottom plate 121 from the other side of the cooling groove 32 and communicates with the inside of the motor housing 2.

[0069] like Figure 6 As shown, a plurality of heat sinks 631 are provided on one side of the power module 63 . The heat sinks 631 are inserted into the cooling grooves 32 . The power module 63 and the edges of the cooling grooves 32 are sealed by a sealing ring.

[0070] Specifically, one end of the liquid inlet pipe 31 of the electronically controlled cooling circuit 3 is located on the outside of the side panel 122 for connecting with an external coolant source, and the other end passes through the inside of the bottom plate 121 and connects with the cooling groove 32; the cooling groove 32 is a groove opened on the inner side surface of the bottom plate 121, and two liquid holes are opened on the cooling groove 32, one liquid hole is connected with the liquid inlet pipe 31, and the other liquid hole is connected with the liquid outlet pipe 33.

[0071] like Fig.11 As shown, the liquid outlet pipe 33 is connected from the other side of the cooling groove 32 through the interior of the bottom plate 121 to the motor cooling circuit 4 inside the motor housing 2.

[0072] During cooling, the coolant enters the cooling tank 32 through the liquid inlet pipe 31, the cooling tank 32 cools the power module 63, and then flows from the cooling tank 32 into the liquid outlet pipe 33, and finally flows from the liquid outlet pipe 33 into the motor cooling circuit 4 to continue cooling the motor.

[0073] like Figure 6As shown, a plurality of protruding heat sinks 631 are provided on one side of the power module 63 facing the cooling groove 32. The heat sinks 631 are inserted into the cooling groove 32, and then the power module 63 is sealed with the edge of the cooling groove 32 by a sealing ring. In this way, when the coolant flows into the cooling groove 32, the coolant contacts the heat sink 631 and takes away the heat of the heat sink 631. Since the sealing ring reduces the gap between the cooling groove 32 and the power module 63 and seals, the coolant will not flow into the hollow cavity of the electric control housing 1, and will not affect the motor controller 6.

[0074] This embodiment realizes a common cooling system for the motor and the motor controller, effectively utilizes the coolant, optimizes the layout of the cooling system, and reduces the cost.

[0075] Furthermore, if Figure 5 and Fig.11 As shown, the electronically controlled cooling circuit 3 also includes a drain pipe 34 , which is disposed inside the bottom plate 121 , one end of the drain pipe 34 is connected to the cooling tank 32 and to the outlet pipe 33 , and the other end of the drain pipe 34 extends from the outer wall of the side panel 122 .

[0076] Specifically, Figure 5 As shown, one end of the drain pipe 34 is connected to the liquid hole at the bottom of the cooling groove 32, and the other end extends from the outer wall of the side panel 122 to discharge excess coolant.

[0077] like Fig.11 As shown, the middle section of the liquid discharge pipe 34 is connected to one end of the liquid outlet pipe 33 , and the other end of the liquid outlet pipe 33 is connected to the liquid inlet 41 of the motor cooling circuit 4 .

[0078] The coolant first flows from the cooling tank 32 into the drain pipe 34, and then flows from the drain pipe 34 into the outlet pipe 33. The other end of the drain pipe 34 can be blocked or a valve can be installed. When cooling, the valve is closed; when it is necessary to discharge excess coolant, the valve is opened.

[0079] It should be noted that Fig.11 The portion between the middle liquid inlet pipe 31 and the liquid outlet pipe 34 is not the cooling groove 32, but the shape of the coolant flowing into the cooling groove 32. The coolant is in the cooling groove 32 and surrounds the plurality of protruding heat sinks 631 for cooling.

[0080] Furthermore, a motor cooling circuit 4 is provided in the motor housing 2, and the motor cooling circuit 4 is arranged inside the circumferential surface of the motor housing 2, and the electric control cooling circuit 3 is connected to the motor cooling circuit 4;

[0081] The motor cooling circuit 4 includes a liquid inlet 41 and a liquid outlet 42 . The liquid inlet 41 is directly connected to the electronically controlled cooling circuit 3 , and the liquid outlet 42 extends from the motor housing 2 .

[0082] Specifically, Fig.11 As shown, the motor cooling circuit 4 is a spiral cooling channel arranged inside the motor housing 2. The spiral cooling channel goes around the circumference of the motor housing 2 and can cool the motor in all directions. The liquid inlet 41 is directly connected to the liquid outlet pipe 33, and the liquid outlet 42 extends out of the motor housing 2 to be connected to the external cooling circulation pipeline. After the cooling circulation pipeline cools the coolant again, it flows into the cooling device again from the liquid inlet pipe 31.

[0083] Furthermore, the motor 5 further includes a motor stator 52 and a motor rotor 53, and the motor rotor 53 is installed inside the motor stator 52. Fig.10 As shown, the motor stator 52 is connected to the electric control motor connecting copper bus 64 via a flexible cable 521 , and the flexible cable 521 penetrates from the motor housing 2 into the auxiliary cavity 12B.

[0084] Specifically, Fig. 9 As shown, there are three flexible cables 521, and each flexible cable 521 is connected to the motor stator 52 through a U-shaped piece 522. The U-shaped piece 522 includes a cable end 522A and a winding end 522B, the cable end 522A is directly connected to the flexible cable 521, and the winding end 522B includes two terminals respectively connected to two winding copper wires, so as to facilitate the connection between the flexible cable 521 and the motor stator winding copper wire.

[0085] Preferably, the outer layer of the flexible cable 521 is wrapped with insulating material to achieve electrical insulation.

[0086] In some other embodiments of the present invention, Fig.12 As shown, the electric drive system includes a reducer assembly 20, which includes a reducer housing 7 and a reducer, and also includes the electronically controlled motor assembly 10 in any of the above embodiments.

[0087] The electric drive system in this embodiment includes two motors 5, and the two motors 5 are symmetrically arranged on the left and right sides of the reducer housing 7. The motor controller 6 also includes two groups, which are respectively located on the outside of the motor 5. The two sets of electronically controlled motor assemblies 10 work independently. The two sets of electronically controlled motor assemblies 10 and the reducer assembly 20 are arranged in the same axial direction, which can reduce the X-direction (front and rear direction) and Z-direction (up and down direction) dimensions, and realize the flattening and miniaturization design of the electric drive system.

[0088] Furthermore, the electric control cooling circuit 3 and the motor cooling circuit 4 are respectively arranged inside the electric control housing 1 and the motor housing 2, and the coolant flows directly from the inside of the electric control housing 1 into the motor housing 2, without the need to arrange external cooling pipelines, thereby reducing space occupation, reducing costs, and also improving cooling efficiency. The two sets of electric control cooling circuits 3 and motor cooling circuits 4 are also arranged symmetrically on both sides of the reducer housing 7, and are cooled independently, optimizing the cooling effect of the dual motors.

[0089] Furthermore, if Fig.13 As shown, the motor housing 2 and the reducer housing 7 are sealed by an oil seal. A bearing installation cavity 71 is provided on the reducer housing 7. A reducer bearing 72 is installed in the bearing installation cavity 71. An oil seal sealing cavity 73 is formed between the reducer bearing 72 and the motor 5.

[0090] The oil seal cavity 73 can achieve sealing between the reducer and the motor, preventing oil from entering the motor housing 2 from the reducer housing 7 .

[0091] Furthermore, if Fig.13 As shown, a motor bearing 55 is provided between the motor 5 and the motor housing 2, and the motor bearing 55 is a grease-lubricated bearing. Since the motor housing 2 and the electronic control housing 1 are connected, the motor bearing 55 is a grease-lubricated bearing instead of an oil-lubricated bearing, which can prevent oil from entering the interior of the motor housing 2 and the electronic control housing 1.

[0092] Preferably, if Fig.13 As shown, the motor 5 also includes an electric shaft 54, and the reducer includes an input shaft 8. The electric shaft 54 ​​and the input shaft 8 are connected by a spline. The motor 5 transmits power to the reducer through the electric shaft 54. The input shaft 8 is connected to two bearings, one is the reducer bearing 72, and the other is the plug bearing 74. The reducer bearing 72 and the plug bearing 74 are both oil-lubricated bearings. This is because there is a large amount of oil in the reducer housing 7. The oil can lubricate the reducer bearing 72 and the plug bearing 74, and can also cool the reducer.

[0093] Preferably, if Fig.13 As shown, a sealing ring 75 is provided between the electric shaft 54 ​​and the input shaft 8 to achieve sealing between the electric shaft 54 ​​and the input shaft 8 .

[0094] In the present invention, the motor housing and the electronic control housing are integrated into one. The internal structure of the housing is arranged to facilitate the electrical connection inside the motor and the motor controller. The layout of the entire electronic control motor assembly is compact, highly integrated, and occupies less space. The electronic control housing and the motor housing are arranged coaxially to reduce the dimensions in the X and Z directions, and realize the flattening and miniaturization design of the electric drive system. In addition, two sets of cooling devices are symmetrically arranged to cool one set of motor and electronic control respectively, thereby improving the cooling efficiency of the dual motors. The electronic control cooling circuit and the motor cooling circuit are respectively arranged inside the electronic control housing and the motor housing. The coolant flows directly from the inside of the electronic control housing into the motor housing, and there is no need to arrange external cooling pipelines, which reduces space occupancy, reduces costs, and also improves cooling efficiency.

[0095] The above description is only the principle and preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several other modifications can be made based on the principle of the present invention, which should also be considered as the protection scope of the present invention.

Claims

1. An electronically controlled motor assembly, comprising an electronically controlled housing, a motor housing, a motor and a motor controller, wherein the motor is installed in the motor housing, and the motor controller is installed in the electronically controlled housing, characterized in that: The motor comprises a resolver stator and a motor stator; The motor housing is a hollow cylindrical shape, the electric control housing is arranged on one side of the motor housing in the axial direction, the electric control housing includes a cover and a shell body, the shell body is integrally formed with the motor housing, the cover is detachably connected to the shell body, the shell body includes a bottom plate, a side panel and a partition, the bottom plate is directly connected to one side of the motor housing, the partition and the bottom plate are located in the same plane and are integrally formed, the partition divides the inner cavity of the shell body into a main cavity and a secondary cavity, the main cavity is located between the cover and the partition, the secondary cavity extends from the partition toward the motor housing in the axial direction and is located on the side of the motor housing, and the cross-sectional area of ​​the main cavity is large. The auxiliary cavity is located at the angle between the motor housing and the main cavity, and the auxiliary cavity is directly connected with the interior of the motor housing along the radial direction of the motor housing. A plurality of plug holes are provided on the partition plate, and the plug holes are used to install the cables of the motor stator and the cables of the resolver stator of the motor, respectively. The cables of the motor stator and the resolver stator enter the auxiliary cavity from the motor housing along the radial direction. The electric control housing also includes a rear cover plate, and the auxiliary cavity is provided with a rear opening on the opposite side of the cover, and the rear cover plate is used to close the rear opening to form the auxiliary cavity into a closed cavity that only connects the main cavity with the interior of the motor housing. The motor controller comprises an electric-control motor connecting copper bar, the electric-control motor connecting copper bar passes through the plug hole and enters into the auxiliary cavity, and the flexible cable of the motor stator is connected to the electric-control motor connecting copper bar.

2. The electronically controlled motor assembly according to claim 1, characterized in that: The motor controller also includes a PCB board, a capacitor and a power module stacked in sequence in the main cavity. The power module is mounted on the bottom surface of the shell body. An electrically controlled cooling circuit for cooling the power module is provided in the shell body.

3. The electronically controlled motor assembly according to claim 2, characterized in that: The electronically controlled cooling circuit includes a liquid inlet pipe, a cooling groove and a liquid outlet pipe, wherein the cooling groove is provided on the bottom plate, the liquid inlet pipe extends from the outside of the side panel into the inside of the bottom plate and communicates with the cooling groove, and the liquid outlet pipe passes through the inside of the bottom plate from the other side of the cooling groove and communicates with the inside of the motor housing; A plurality of heat sinks are disposed on one side of the power module. The heat sinks are inserted into the cooling grooves. The power module and the edges of the cooling grooves are sealed by a sealing ring.

4. The electronically controlled motor assembly according to claim 2, characterized in that: A motor cooling circuit is provided in the motor housing, the motor cooling circuit is arranged inside the circumferential surface of the motor housing, and the electric control cooling circuit is communicated with the motor cooling circuit; The motor cooling circuit comprises a liquid inlet and a liquid outlet, wherein the liquid inlet is directly connected to the electronically controlled cooling circuit, and the liquid outlet extends from the motor housing.

5. The electronically controlled motor assembly according to claim 1, characterized in that: The motor further comprises a motor stator and a motor rotor, wherein the motor rotor is installed inside the motor stator, and the motor stator is connected to the electric control motor connecting copper busbar via a flexible cable, and the flexible cable penetrates from the motor housing into the auxiliary cavity.

6. An electric drive system, comprising a reducer assembly, wherein the reducer assembly comprises a reducer housing and a reducer, characterized in that: It also includes the electronically controlled motor assembly as described in any one of claims 1-5.

7. The electric drive system according to claim 6, characterized in that: The two electronically controlled motor assemblies are symmetrically arranged on both sides of the reducer, and the motor housing is directly connected to the reducer housing.

8. The electric drive system according to claim 7, characterized in that: The motor housing and the reducer housing are sealed by an oil seal. A bearing installation cavity is provided on the reducer housing. A reducer bearing is installed in the bearing installation cavity. An oil seal cavity is formed between the reducer bearing and the motor.

9. The electric drive system according to claim 6, characterized in that: A motor bearing is arranged between the motor and the motor housing, and the motor bearing is a grease-lubricated bearing.

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