WO2024001448A1

WO2024001448A1 - Electric motor, power train and vehicle

Info

Publication number: WO2024001448A1
Application number: PCT/CN2023/089216
Authority: WO
Inventors: 兰华; 陈金华; 周朝
Original assignee: 华为数字能源技术有限公司
Priority date: 2022-06-28
Filing date: 2023-04-19
Publication date: 2024-01-04
Also published as: CN115224835A

Abstract

The present application relates to the technical field of electric motors, and in particular to an electric motor, a power train and a vehicle. The electric motor comprises a rotating shaft, a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are both sleeved on the rotating shaft; the stator assembly comprises a stator winding and a stator iron core, and the stator winding is located on the stator iron core; the rotor assembly comprises a rotor winding, a rotor iron core and a magnetically conductive body; the rotor iron core is located in the stator iron core, and a first end of the rotor iron core is flush with a first end of the stator iron core; the magnetically conductive body is arranged at a second end of the rotor iron core, and the end of the magnetically conductive body that is away from the rotor iron core is flush with a second end of the stator iron core; the magnetically conductive body comprises a first portion and a second portion; the end of the first portion that is away from the rotating shaft is connected to the second portion; the first portion and the second portion form an accommodating cavity with an opening facing away from the rotor iron core; and an end portion of the rotor winding is located in an accommodating space enclosed by the accommodating cavity and the stator assembly. The electric motor provided by the present application has a relatively high power density.

Description

Electric motors, powertrains and vehicles

Cross-references to related applications

This application claims priority to the Chinese patent application filed with the China Patent Office on June 28, 2022, with application number 202210754022.1 and application name "Motors, Powertrains and Vehicles", the entire content of which is incorporated into this application by reference. .

Technical field

This application relates to the field of motor technology, specifically to a motor, a powertrain and a vehicle.

Background technique

With the development of the technical level of the electric vehicle industry and the improvement of market requirements, the drive motors of electric vehicles are developing in the direction of higher power density. Higher power density drive motors use less raw materials, reduce costs, and can make power The arrangement of the assembly in the car is more flexible.

Therefore, how to improve the power density of motors has become an urgent problem to be solved.

Contents of the invention

This application provides an electric motor, a power assembly and a vehicle. The electric motor has high power density.

In a first aspect, this application provides a motor. The motor includes a rotating shaft, a stator assembly and a rotor assembly. The stator assembly and the rotor assembly are both sleeved on the rotating shaft. The stator assembly includes a stator winding and a stator core. The stator winding is located on the stator core; the rotor The assembly includes a rotor winding, a rotor core and a magnet. The rotor core is located in a stator core. The rotor core includes a first end perpendicular to the rotation axis and a second end opposite to the first end. The stator core includes a first end perpendicular to the rotation axis. end and a second end opposite to the first end, wherein the first end of the rotor core is flush with the first end of the stator core, the magnet conductor is arranged at the second end of the rotor core, and the end of the magnet conductor away from the rotor core is in contact with the stator The second end of the iron core is flush, wherein the magnetic conductor includes a first part and a second part, the rotating shaft passes through the first part, the first part extends along the radial direction of the rotating shaft, the second part is connected to an end of the first part away from the rotating shaft, and the The two parts extend along the axial direction of the rotating shaft to the side away from the rotor core. The first part and the second part can form an accommodation cavity. The opening of the accommodation cavity is located on the side away from the rotor core. The end of the rotor winding is arranged between the accommodation cavity and the rotor core. in the accommodation space surrounded by the stator assembly. Specifically, the magnetic conductor is arranged at the second end of the rotor core, and the magnetic conductor can conduct the magnetic flux generated by the rotor winding to the second end of the stator core, realizing electromagnetic interaction between the stator core and the rotor core, and generating an induced electromotive force. and torque, ensuring that the torque and power of the motor are basically unchanged relative to the torque and power of a motor in which the ends of the rotor core and the stator core are flush; in addition, the first part and the second part of the magnetic conductor form an accommodation cavity, and the accommodation cavity The arrangement can increase the volume of the accommodation space surrounded by the accommodation cavity and the stator assembly, so that more components can be accommodated in the accommodation space. For example, the end of the rotor winding can be arranged in the accommodation space, thereby reducing the volume of the entire motor. Motor power density can also be increased.

It should be noted that in order to ensure that the torque and power of the motor are basically unchanged, the magnetic permeability of the magnetic conductor is usually greater than the magnetic permeability of the rotor core; in addition, in order to enable the end of the rotor winding to be placed in the accommodation cavity, the magnetic conductive body The first part can be provided with holes for the rotor windings to pass through; furthermore, the first part of the magnetic conductor can be a plate-like structure, and the second part can be an annular structure, and the magnetic conductor can also be regarded as a cylinder. There are cylindrical grooves on the body, and the grooves The bottom surface of the rotor can be provided with an opening for the rotating shaft to pass through, and the above-mentioned hole for the winding of the rotor winding to pass through.

In a possible embodiment, the first part of the magnetic conductor has a first surface facing the rotor core, the second part of the magnetic conductor has a second surface facing the stator core, the first surface and the second surface are perpendicular to each other. The two surfaces are parallel to the surface of the stator core facing the rotation axis. The second part of the magnetic conductor can guide the axial component of the magnetic field and expand the area where the magnetic field is distributed in the axial direction, so that the generated magnetic flux can radially reach the second end of the stator core after axial expansion. Realize the electromagnetic interaction between the stator core and the rotor core to generate induced electromotive force and torque, thereby ensuring that the torque and power of the motor are relative to the rotor core and stator core when the rotor core is small in the axial direction of the rotating shaft. The torque and power of a motor with flush ends are essentially unchanged.

It should be noted that the sum of the lengths of the first part of the magnetic conductor and the rotor core along the axial direction of the rotating shaft is smaller than the length of the stator core along the axial direction of the rotating shaft, so that the volume of the accommodation space enclosed by the accommodation cavity and the stator assembly is larger. , to improve the power density of the motor; the end of the second part of the magnetic conductor away from the rotor core is flush with the second end of the stator core, which can ensure that the torque and power of the motor with the above accommodation space are basically unchanged. Among them, the conductor here The end of the second part of the magnet that is far away from the rotor core is flush with the second end of the stator core. It can be understood that the end of the second part of the magnet that is far away from the rotor core is roughly flush with the second end of the stator core, that is, the third end of the magnet is One end of the two parts away from the rotor core and the second end of the stator core protrudes from the other, or the end of the second part of the magnet conductor away from the rotor core is completely flush with the second end of the stator core in the axial direction. Similarly, the first end of the above-mentioned rotor core is flush with the first end of the stator core. It can be understood that the first end of the rotor core is roughly flush with the first end of the stator core, that is, the first end of the rotor core is flush with the stator core. One of the first ends protrudes beyond the other, or the first end of the rotor core is completely flush with the first end of the stator core in the axial direction.

In a possible embodiment, the motor may further include an insulating skeleton, which is disposed in the accommodation space, and is connected to a side of the magnet conductor away from the second end of the rotor core. Among them, the setting of the insulating skeleton can separate the rotor winding and the magnetic conductor to insulate the rotor winding and the magnetic conductor. It can also prevent the rotor winding from contacting other components and ensure the stability of the rotor winding operation.

It should be noted that the rotor windings and the magnet conductor located in the accommodation space may also be spaced apart, or other insulating materials may be provided between the rotor and the magnet conductor located in the accommodation space.

In the above embodiment, the motor may further include an end plate. The end plate is sleeved on the rotating shaft, and the end plate is arranged in the accommodation space. The side of the end plate away from the rotating shaft is connected to the insulating frame to divide the accommodation space into first Accommodating cavity and second accommodating cavity, the first accommodating cavity is used to set the end of the rotor winding, the second accommodating cavity can accommodate slip rings or wireless excitation module rotors and wireless excitation module stators.

When a slip ring is provided in the second accommodation cavity, the motor also includes a carbon brush and a brush holder, wherein the brush holder and the slip ring are both sleeved on the rotating shaft, there is a gap between the brush holder and the rotating shaft, and the slip ring is arranged on the second In the accommodation cavity, the brush holder is located on the side of the slip ring away from the rotor core, and the slip ring is connected to the rotating shaft, that is, the slip ring rotates with the rotating shaft, one end of the carbon brush is connected to the brush holder, and the other end of the carbon brush is connected to the slip ring. . In this way, the slip ring is disposed in the second accommodation cavity, thereby reducing the size of the motor and increasing the power density of the motor.

It should be noted that the brush holder may be disposed outside the stator winding, or the brush holder may be disposed in the second accommodation cavity.

When the wireless excitation module rotor and the wireless excitation module stator are disposed in the second accommodation cavity, a flexible circuit board may also be disposed in the accommodation space, and the flexible circuit board is connected to the rotor winding and the wireless excitation module rotor to connect the wireless excitation module to the wireless excitation module rotor. The electrical energy collected by the module rotor is converted into the form of electrical energy required by the rotor winding. Among them, the wireless excitation module rotor and the wireless excitation module stator can be arranged along the axial direction of the rotating shaft, or the wireless excitation module rotor and the wireless excitation module The stator may be arranged in the radial direction of the rotation axis. Among them, the wireless excitation module rotor is connected to the rotating shaft, and there is a gap between the wireless excitation module stator and the wireless excitation module rotor. Both the wireless excitation module stator and the wireless excitation module rotor are arranged in the second accommodation cavity, so that the excitation device can be installed in the motor. The arrangement is closer, so that the excitation device occupies less space in the motor. In this way, the axial direction of the wireless excitation module rotor and wireless excitation module stator is closer to the stator winding, thus reducing the size of the motor. Increase motor power density.

In the above embodiment, in order to improve the stability of the motor, the motor may also include a sheath. The sheath is disposed between the insulating frame and the inner wall of the stator winding. That is, the sheath is disposed between the insulating frame and the magnet conductor away from the rotating shaft. On one side, more specifically, the sheath can be an interference fit with the insulating skeleton and the magnet conductor.

When a rotor core is provided in the stator winding, there needs to be a set distance between the rotor core and the stator core to ensure the normal operation of the motor. That is, there is a first gap between the rotor core and the stator core. In order to make the magnetic conductor After being placed in the accommodation cavity, the torque and power of the motor remain basically unchanged. There also needs to be a set distance between the side of the second part of the magnetizer facing the stator core and the stator core, that is, the second part of the magnetizer and the stator core. There is a second gap between them, and the second gap has the same width as the first gap along the radial direction of the rotating shaft.

In a second aspect, this application also provides a power assembly, which may include a transmission mechanism and the motor in any of the above technical solutions, and the transmission mechanism may be drivingly connected to the rotating shaft. The volume of the powertrain with the above-mentioned motor is reduced due to the reduction in the volume of the motor, thereby increasing the flexibility of the powertrain layout.

In a third aspect, this application also provides a vehicle, which may include the powertrain in the second aspect.

Description of drawings

Figure 1 is a schematic structural diagram of a motor provided by an embodiment of the present application;

Figure 2 is a partial schematic diagram of Figure 1;

Figure 3 is another structural schematic diagram of the motor provided by the embodiment of the present application;

Figure 4 is another structural schematic diagram of the motor provided by the embodiment of the present application;

Figure 5 is another structural schematic diagram of the motor provided by the embodiment of the present application.

Reference signs: 10-shaft; 20-stator assembly; 21-stator winding; 22-stator core; 30-rotor assembly; 31-rotor winding; 32-rotor core; 40-magnetic conductor; 41-first part; 42- The second part; 50-Accommodating space; 51-First accommodating cavity; 52-Second accommodating cavity; 60-Insulating skeleton; 70-End plate; 80-Slip ring; 90-Carbon brush; 100-Brush holder; 110- Wireless excitation module stator; 120-wireless excitation module rotor; 130-flexible circuit board; 140-sheath.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail below in conjunction with the accompanying drawings.

In the existing technology, the high power density of electrically excited synchronous motors has received more and more attention. Compared with permanent magnet synchronous motors, the rotor of electrically excited motors is wound with windings, and an excitation device is required to energize the windings; generally speaking, , the excitation device is generally set at the end of the motor. The excitation device can be a brush and slip ring module, or a wireless excitation module. The stator of the brush and wireless excitation module is connected to the casing of the motor, and the slip ring and The rotor of the wireless excitation module is connected to the rotor of the motor. As a result, the existence of the excitation device will occupy the space at the end of the motor and reduce the power density of the motor.

To this end, this application provides a new type of motor to solve the above problems.

The terminology used in the following examples is for the purpose of describing specific embodiments only and is not intended to be a reference to the present application. Please limit. As used in the specification and appended claims of this application, the singular expressions "a,""an,""theabove,""the" and "the" are intended to also include, for example, "a or "plural" unless the context clearly indicates otherwise.

Reference in this specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Therefore, the phrases "in one embodiment", "in some embodiments", "in other embodiments", "in other embodiments", etc. appearing in different places in this specification are not necessarily References are made to the same embodiment, but rather to "one or more but not all embodiments" unless specifically stated otherwise. The terms “including,” “includes,” “having,” and variations thereof all mean “including but not limited to,” unless otherwise specifically emphasized.

Referring to Figures 1 and 2, this application provides a motor. In Figure 1, a refers to the first end of the stator core 22, and b refers to the first end of the rotor core 32. The motor includes a rotating shaft 10, The stator assembly 20 and the rotor assembly 30; the stator assembly 20 includes a stator winding 21 and a stator core 22. The stator winding 21 is provided on the stator core 22, and both the stator winding 21 and the stator core 22 are sleeved on the rotating shaft 10. The rotor assembly 30 includes The rotor winding 31, the rotor core 32 and the magnet 40 are sleeved on the rotating shaft 10, and the rotor core 32 is located in the stator core 22. The rotor core 32 includes a first end perpendicular to the rotating shaft 10. and a second end opposite to the first end. The stator core 22 includes a first end perpendicular to the rotating axis 10 and a second end opposite to the first end. The first end of the rotor core 32 is flat with the first end of the stator core 22 . The magnetic conductor 40 is arranged at the second end of the rotor core 32, and the end of the magnetic conductor 40 away from the rotor core 32 is flush with the second end of the stator core 22. The magnetic conductor 40 may include a first part 41 and a second part 42, and the rotating shaft 10 passes through the first part 41, the first part 41 extends along the radial direction of the rotating shaft 10, the second part 42 extends along the axial direction of the rotating shaft 10, and the second part 41 is connected to an end of the first part 41 away from the rotating shaft 10, the first part 41 and the second part 42 form an accommodating cavity with an opening facing away from the rotor core 32, and the end of the rotor winding 31 is located in the accommodating space 50 surrounded by the accommodating cavity and the stator assembly 20; wherein, the magnetizer 40 can absorb the magnetism generated by the rotor winding 31. The flux is conducted to the second end of the stator core 22. Specifically, the first part 41 of the magnetic conductor 40 is used to conduct the generated magnetic flux to the second part 42 along the radial direction, and the second part 42 extends along the axial direction, The second part 42 can guide the magnetic field to generate an axial component and expand the area where the magnetic field is distributed in the axial direction. The second part 42 can conduct the magnetic flux conducted by the first part 41 to the third part of the stator core 22 along the axial direction. The two ends realize the electromagnetic interaction between the stator core 22 and the rotor core 32 to generate induced electromotive force and torque, thereby ensuring the torque and power of the motor even when the length of the rotor core 32 along the axial direction of the rotating shaft 10 is small. Basically unchanged. In addition, the first part 41 and the second part 42 form an accommodating cavity with an opening facing away from the rotor core 32. The arrangement of the accommodating cavity can increase the volume of the accommodating space 50 enclosed by the accommodating cavity and the stator assembly 20, so that the accommodating space 50 can accommodate More components, such as: the end of the rotor winding 31 can be arranged in the accommodation space, thereby reducing the volume of the entire motor and increasing the power density of the motor.

It should be noted that the first part 41 and the second part 42 can be prepared by integral molding, and the first part 41 can be provided with a hole for the winding of the rotor winding 31 to pass through, so that the end of the rotor winding 31 can be disposed on in the accommodation space. In addition, the magnetic conductor 40 can be regarded as having a cylindrical groove on the cylinder, and the bottom surface of the groove can be provided with an opening for the rotating shaft 10 to pass through, as well as the above-mentioned winding for the rotor winding 31 hole through.

When the rotor core 32 is provided in the stator winding 21, a set distance is required between the rotor core 32 and the stator core 22 to ensure the normal operation of the motor, that is, there is a first gap between the rotor core 32 and the stator core 22. , and in order to ensure that the magnetizer 40 is disposed behind the accommodation cavity and the torque and power of the motor remain basically unchanged, there also needs to be a set distance between the side of the second part 42 of the magnetizer 40 facing the stator core 22 and the stator core 22 , that is, there is a second gap between the second surface of the second part 42 of the magnetic conductor 40 and the stator core 22 . Along the radial direction of the rotating shaft 10 , the second gap The width of the first gap is the same, so that the magnetizer 40 and the rotor core 32 can be regarded as a whole and work normally.

Continuing to refer to FIG. 2 , when the first part 41 and the second part 42 in the magnetizer 40 are specifically arranged, the first part 41 has a first surface facing the rotor core 32 , the first surface and the plane where the second end of the rotor core 32 is located. Parallel, the second part has a second surface facing the stator core 22, the first surface and the second surface are vertically connected, the second surface is parallel to the surface of the stator core 22 facing the rotation axis, and the end of the second part 42 away from the rotor core 32 is with The second end of the stator core 22 is parallel. In this way, it can be ensured that the torque and power of the motor are basically unchanged compared to the torque and power of the motor where the ends of the rotor core and the stator core are flush.

When the first part 41 and the second part 42 are specifically arranged, the side of the first part 41 away from the rotor core 32 (the inside of the first part) may not be parallel to the first surface of the first part 41. Similarly, the second part 42 is away from the stator core. One side of 22 (the inside of the second part 42) may not be parallel to the second surface of the second part 42, and the connection between the inside of the first part 41 and the inside of the second part 42 may be rounded or at a right angle.

It should be noted that the sum of the lengths of the first part 41 of the magnetic conductor 40 and the rotor core 32 along the axial direction of the rotating shaft 10 is less than the length of the stator core 22 along the axial direction of the rotating shaft, so that the accommodation cavity and the stator assembly 20 form a The volume of the accommodation space is larger to increase the power density of the motor; in order to ensure that the torque and power of the motor are basically unchanged, one end of the second part 42 of the magnet 40 away from the rotor core 32 is flush with the second end of the stator core 22; It will be described below that the end of the second part 42 of the magnetizer 40 away from the rotor core 32 is flush with the second end of the stator core 22 , and the first end of the rotor core 32 is flush with the first end of the stator core 22 . Here, The end of the second part 42 of the magnetizer 40 away from the rotor core 32 is flush with the second end of the stator core 22 , and the first end of the rotor core 32 is flush with the first end of the stator core 22 , which can be understood as The first end of the rotor core 32 is substantially flush with the first end of the stator core 22 , that is, one of the first end of the rotor core 32 and the first end of the stator core 22 can protrude from the other, or the rotor core 32 The first end of the magnet 40 is completely flush with the first end of the stator core 22; similarly, the end of the second part 42 of the magnet 40 away from the rotor core 32 can also be understood to be substantially flush with the second end of the stator core 22. , that is, one end of the second part 42 away from the rotor core 32 and the second end of the stator core 22 protrude from the other, or one end of the two parts 42 away from the rotor core 32 and the second end of the stator core 22 are completely flush.

Referring to FIG. 3 , in order to ensure the stability of the operation of the end of the rotor winding 31 in the accommodation space 50 and prevent the end of the rotor winding 31 from contacting other components (such as the stator winding 21 ) during operation, the motor may also include an insulating skeleton. 60. The insulating skeleton 60 is arranged in the accommodation space 50. The insulating skeleton 60 is connected to the side of the magnet conductor 40 away from the second end of the rotor core 32 to insulate the end of the rotor winding 31 from the stator winding 21 and the magnet conductor 40. set up.

It should be noted that the end of the rotor winding 31 and the magnetic conductor 40 may also be spaced apart, or other insulating materials may be provided between the end of the rotor winding 31 and the magnetic conductor 40 .

An end plate 70 may also be provided in the motor. The end plate 70 may be disposed in the accommodating space 50 , and the end plate 70 is sleeved on the rotating shaft 10 . One end of the rotating shaft 10 away from the end plate 70 may be connected to the insulating frame 60 . 70 can divide the accommodating space 50 into two parts, the two parts are the first accommodating cavity 51 and the second accommodating cavity 52 respectively. The first accommodating cavity 51 is located on the side close to the rotor core 32, and the end of the rotor winding 31 can The excitation device can be disposed in the first accommodating cavity 51 and the second accommodating cavity 52 . Since the excitation device can be disposed in the second accommodating cavity 52 , the volume of the entire motor can be reduced, thereby increasing the power density of the motor.

It should be noted that in the direction from the insulating frame 60 to the rotating shaft 10 , the end plate 70 can gradually extend to the position where the second end of the rotor core 32 is located, as long as it is ensured that the end of the rotor winding 31 can be accommodated in the first accommodation cavity 51 That is, the end plate 70 can have a variety of shapes, which are not listed here. The volumes of the divided first accommodation cavity 51 and the second accommodation cavity 52 can be adjusted by changing the shape of the end plate 70 .

Referring to Figure 4, the excitation device may include a slip ring 80, a carbon brush 90 and a brush holder 100. The brush holder 100 and the slip ring 80 may both be sleeved on the rotating shaft. There is a gap between the brush holder 100 and the rotating shaft. The slip ring 80 and the rotating shaft connection, wherein the slip ring 80 can be disposed in the second accommodation cavity 52 , and the brush holder 100 can be disposed outside the stator winding 21 , and the carbon brush 90 connects the brush holder 100 to the slip ring 80 . Alternatively, the brush holder 100 can also be disposed in the second receiving cavity 52 , and the brush holder 100 is located on the side of the slip ring 80 away from the rotor core 32 , and the carbon brush 90 connects the brush holder 100 and the slip ring 80 . Since the slip ring 80 is disposed in the second accommodation cavity 52 , compared to the part in the excitation device that is disposed on the motor housing, the overall size of the motor will be reduced while the motor torque and power remain basically unchanged, thereby improving the performance of the motor. Motor power density.

Referring to FIG. 5 , the excitation device may further include a wireless excitation module rotor 120 and a wireless excitation module stator 110 . The wireless excitation module rotor 120 and the wireless excitation module stator 110 may both be disposed in the second accommodation cavity 52 . The wireless excitation module stator 110 and the wireless excitation module stator 110 The excitation module rotors 120 are sleeved on the rotating shaft, and the wireless excitation module rotor 120 can be arranged along the axial direction of the rotating shaft 10 or along the radial direction of the rotating shaft 10 , wherein the wireless excitation module rotor 120 is connected to the rotating shaft 10 , and the wireless excitation module stator There is a gap between the wireless excitation module rotor 120 and the wireless excitation module rotor 120. In this way, the wireless excitation module stator 110 is also arranged in the second accommodation cavity 52 according to the arrangement of the wireless excitation module rotor 120; between the wireless excitation module rotor 120 and the wireless excitation module stator When 110 is set, the excitation device also needs to include a flexible circuit board 130. The flexible circuit board 130 is placed in the accommodation space. The flexible circuit board 130 is connected to the rotor winding 31 and the wireless excitation module rotor 120 to connect the wireless excitation module rotor 120. The collected electrical energy is converted into the form of electrical energy required by the rotor winding 31 . In this arrangement, the wireless excitation module stator 110 and the wireless excitation module rotor 120 in the excitation device are both arranged in the second accommodation cavity 52, so that the excitation device is arranged more closely in the motor and the excitation device occupies the center of the motor. The space is smaller, and compared with the wireless excitation module stator 110 being arranged on the motor casing, the wireless excitation module rotor 120 and the wireless excitation module stator 110 are closer to the stator winding 21 in the axial direction, thereby reducing the size of the motor. The volume increases the motor power density.

In the above embodiment, a sheath may also be provided between the insulating frame 60 and the inner wall of the stator winding 21 , that is, the sheath 140 is provided on the side of the insulating frame 60 and the magnet conductor 40 away from the rotating shaft 10 . More specifically, the sheath 140 is The sheath 140 can be in interference fit with the insulating frame 60 and the magnetic conductor 40, and the setting of the sheath can improve the stability of the motor operation.

In the above embodiment, along the axial direction of the rotating shaft 10 , the rotating shaft 10 is provided with a first shoulder and a second shoulder, and the stator winding 21 is arranged between the first shoulder and the second shoulder.

This application also provides a power assembly, which may include a transmission mechanism and the motor in any of the above technical solutions, and the transmission mechanism may be drivingly connected to the rotating shaft. The volume of the powertrain with the above-mentioned motor is reduced due to the reduction in the volume of the motor, thereby increasing the flexibility of the powertrain layout.

This application also provides a vehicle, which may include the above-mentioned powertrain.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present application, and all of them should be covered. within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A motor, characterized in that it includes:

axis;

A stator assembly, the stator assembly is sleeved on the rotating shaft, the stator assembly includes a stator winding and a stator core, and the stator winding is provided on the stator core;

The rotor assembly is sleeved on the rotating shaft. The rotor assembly includes a rotor winding, a rotor core and a magnet. The rotor core is located in the stator core. The rotor core includes a rotor core that is perpendicular to the rotating shaft. A first end and a second end opposite to the first end, the stator core includes a first end perpendicular to the rotation axis and a second end opposite to the first end, wherein the rotor core The first end is flush with the first end of the stator core, the magnetic conductor is disposed at the second end of the rotor core, and the end of the magnetic conductor away from the rotor core is connected to the second end of the stator core. flush; flush;

Wherein, the magnetic conductor includes a first part and a second part, the rotating shaft passes through the first part, the first part extends along the radial direction of the rotating shaft, and the second part extends along the axial direction of the rotating shaft. The first part extends in the direction, and one end of the first part away from the rotating shaft is connected to the second part. The first part and the second part form an accommodation cavity with an opening facing away from the rotor core. The end of the rotor winding It is located in the accommodation space surrounded by the accommodation cavity and the stator assembly.
The motor according to claim 1, wherein the first part of the magnetic conductor has a first surface facing the rotor core, and the second part of the magnetic conductor has a second surface facing the stator core. The first surface and the second surface are perpendicular to each other, and the second surface is parallel to the surface of the stator core facing the rotation axis.
The motor according to claim 2, wherein the sum of the lengths of the first part of the magnetic conductor and the rotor core along the axial direction of the rotating shaft is less than the length of the stator core along the axial direction of the rotating shaft. The length of the second part of the magnetic conductor is far away from the rotor core and is flush with the second end of the stator core.
The motor according to any one of claims 1 to 3, characterized in that the motor further includes an insulating frame, the insulating frame is located in the accommodation space, and the insulating frame and the magnetic conductor are away from the One side of the second end of the rotor core is connected, and the insulating frame is used to separate the rotor winding from the magnetic conductor.
The motor according to claim 4, wherein the motor further includes an end plate, the end plate is located in the accommodation space, one end of the end plate is connected to the insulating frame, and the other end of the end plate is connected to the insulating frame. One end is close to the rotating shaft to divide the accommodation space into a first accommodation cavity and a second accommodation cavity, and the end of the rotor winding is arranged in the first accommodation cavity.
The motor according to claim 5, wherein the motor further includes a slip ring, a carbon brush and a brush holder, and the brush holder and the slip ring are sleeved on the rotating shaft;

There is a gap between the side of the brush holder facing the rotating shaft and the rotating shaft, the slip ring is connected to the rotating shaft on the side facing the rotating shaft, and the slip ring is disposed in the second accommodation cavity, The brush holder is arranged on the side of the slip ring away from the rotor core. One end of the carbon brush is connected to the slip ring, and the other end of the carbon brush is connected to the brush holder.
The motor according to claim 5, wherein the motor further includes a wireless excitation module rotor and a wireless excitation module stator disposed in the second accommodation cavity, the wireless excitation module stator and the wireless excitation module rotor both It is sleeved on the rotating shaft, and the wireless excitation module stator is located outside the wireless excitation module rotor;

Wherein, the wireless excitation module rotor is connected to the rotating shaft, and there is a gap between the wireless excitation module stator and the wireless excitation module rotor.
The motor according to claim 7, wherein the motor further includes a flexible circuit board disposed in the accommodation space, and the flexible circuit board is connected to the rotor winding and the wireless excitation module rotor.
The motor according to any one of claims 4 to 8, further comprising a sheath, which is disposed on the side of the insulating frame and the magnetic conductor away from the rotating shaft.
The motor according to any one of claims 2 to 9, characterized in that there is a first gap between the rotor core and the stator core, and the second part of the magnetic conductor faces one side of the stator core. There is a second gap between the stator core and the stator core, and the first gap and the second gap have the same width in the radial direction.
The motor according to any one of claims 2 to 10, wherein the magnetic permeability of the magnetic permeable body is greater than the magnetic permeability of the rotor core.
A power assembly, characterized in that it includes a transmission mechanism and the motor according to any one of claims 1 to 11, and the transmission mechanism is connected to the rotating shaft.
A vehicle, characterized by comprising a powertrain as claimed in claim 12.