Magnetic adjustment assembly, electric motor and vehicle

Abstract

A vehicle, comprising an electric motor provided with a magnetic adjustment assembly. The magnetic adjustment assembly (30) comprises: a magnetically conductive member (31), which is adapted to be movably arranged on at least one axial end of a rotor (20), thus adjusting the magnetic flux passing through the rotor (20); and an actuation component (32), which is connected to the magnetically conductive member (31) and is configured to adjust the position of the magnetically conductive member (31) relative to the rotor (20).

Description

Magnetizing components, motors and vehicles

[0001] Cross-reference of related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 2024107108379, filed on May 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of motor technology, and more specifically, to a magnetizing assembly, a motor, and a vehicle. Background Technology

[0004] Electric motors, such as electrically excited synchronous motors and permanent magnet synchronous motors, each have their own advantages, but they also have obvious performance shortcomings. Electrically excited synchronous motors have low efficiency at low speeds and light loads, while permanent magnet synchronous motors have torque and efficiency limitations at high speeds.

[0005] In related technologies, the air gap magnetic field is adjusted by axially moving the rotor out of the stator or by moving the stator to reduce the overlap between the rotor and the stator core, thereby decreasing the magnetic flux and combining the advantages of permanent magnet motors and electrically excited motors. However, to achieve axial movement of the rotor or stator, a large axial force needs to be overcome, a large moving actuator is required, and a significant amount of energy is consumed. Summary of the Invention

[0006] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a magnetic flux adjustment component, which adjusts the magnetic flux through the rotor, thereby adjusting the magnetic flux of the main magnetic field. The adjustment is convenient, and while ensuring high torque density and power density, it effectively widens the constant power operation range and the high efficiency range.

[0007] This application also proposes an electric motor, wherein the vehicle includes the aforementioned magnetizing assembly.

[0008] This application also proposes a vehicle that includes the aforementioned motor.

[0009] According to an embodiment of this application, the magnetic adjustment assembly includes: a magnetic conductor adapted to be movably disposed at at least one end of the rotor along its axial direction to adjust the magnetic flux through the rotor; and an actuating component connected to the magnetic conductor for adjusting the position of the magnetic conductor relative to the rotor.

[0010] According to the magnetic adjustment component of the present application embodiment, the magnetic guide element is adapted to be movably disposed at at least one end of the rotor axial direction to adjust the magnetic flux through the rotor. The magnetic guide element is connected to the actuating component to adjust the position of the magnetic guide element relative to the rotor, thereby changing the magnetic flux of the magnetic flux short circuit loop formed by the magnetic guide element and the rotor, thereby realizing the adjustment of the magnetic flux of the main magnetic field. The adjustment is convenient, so that the motor using the magnetic adjustment component can have the advantages of both constant torque region and constant power region, and effectively expand the constant power operation region and high efficiency region while ensuring high torque density and power density.

[0011] In some embodiments of this application, the magnetic conductor is movable along the axial direction of the rotor.

[0012] In some embodiments of this application, the magnetic conductor may be moved circumferentially along the rotor; and / or the magnetic conductor may be moved radially along the rotor.

[0013] In some embodiments of this application, a first housing is further included, the first housing being open to one side facing the rotor, and the magnetic conductor and the actuating component are both located within the first housing.

[0014] In some embodiments of this application, the first housing is provided with a movable cavity, and the actuating component includes: a magnetic adjustment slip ring, which is adapted to move along the axial direction of the rotor under the push of the medium in the movable cavity, and the magnetic conductor is connected to one end of the magnetic adjustment slip ring facing the rotor.

[0015] In some embodiments of this application, the first housing is provided with an oil port, which is located on the side of the magnetic adjustment slip ring away from the rotor body, and the oil port is in communication with the moving cavity.

[0016] In some embodiments of this application, the actuating component further includes an elastic element connected to the magnetic adjustment slip ring, which is used to drive the magnetic adjustment slip ring to move in an axial direction away from the rotor.

[0017] In some embodiments of this application, the elastic element is located within the moving cavity and on the side of the magnetic adjustment slip ring away from the rotor, with both ends of the elastic element connected to the magnetic adjustment slip ring and the surface of the moving cavity away from the rotor, respectively; or, the elastic element is located on the side of the magnetic adjustment slip ring facing the rotor, with both ends of the elastic element connected to the magnetic adjustment slip ring and the surface of the first housing near the rotor, respectively.

[0018] In some embodiments of this application, the first housing is provided with a limiting member, and the two ends of the elastic member are respectively connected to the magnetic slip ring and the limiting member.

[0019] In some embodiments of this application, the magnetic adjustment slip ring has a groove on the side facing the rotor, and the magnetic conductive element is disposed in the groove.

[0020] In some embodiments of this application, a sealing ring is provided between the peripheral wall of the magnetic adjustment slip ring and the peripheral wall of the moving cavity.

[0021] In some embodiments of this application, the magnetic adjustment assembly further includes a displacement sensor for detecting the axial distance between the magnetic conductor and the rotor.

[0022] In some embodiments of this application, the magnetic conductor is formed by winding a magnetic sheet around the axis of the rotor.

[0023] The motor according to an embodiment of this application includes: a rotor; and the above-described magnetizing assembly.

[0024] According to the embodiments of this application, a motor is provided with a magnetic adjustment component. The magnetic guide is adapted to be movably disposed at at least one end of the rotor's axial direction to adjust the magnetic flux through the rotor. The motor is connected to the magnetic guide through an actuating component to adjust the position of the magnetic guide relative to the rotor, thereby changing the magnetic flux of the magnetic flux short-circuit loop formed by the magnetic guide and the rotor, and thus realizing the adjustment of the magnetic flux of the main magnetic field. The adjustment is convenient, so as to realize the advantages of the motor in both constant torque region and constant power region, and effectively expand the constant power operation region and high efficiency region while ensuring high torque density and power density.

[0025] In some embodiments of this application, the rotor includes a rotor body and a magnetic conductive part, wherein the magnetic conductive part is disposed within the rotor body.

[0026] In some embodiments of this application, the rotor body includes: a rotor core, the rotor core having a plurality of first magnetic grooves and a plurality of magnetic steel grooves extending along the axial direction; the magnetic part is disposed in the first magnetic groove, and the permanent magnet of the rotor is disposed in the magnetic steel groove.

[0027] In some embodiments of this application, the rotor body further includes: a magnetic shielding plate, the magnetic shielding plate is provided at the axial end of the rotor core, the magnetic shielding plate has a second magnetic guide groove that extends through in the axial direction, and the magnetic guide part is disposed in the first magnetic guide groove and the second magnetic guide groove.

[0028] In some embodiments of this application, the magnetic conductive part and the rotor core are an integral piece.

[0029] In some embodiments of this application, the rotor core is a skewed-pole rotor.

[0030] In some embodiments of this application, the outer peripheral wall of the rotor core is provided with an auxiliary groove extending along the axial direction.

[0031] In some embodiments of this application, there are multiple magnetic conductive parts, and the multiple magnetic conductive parts are spaced apart along the circumferential direction of the rotor.

[0032] In some embodiments of this application, each magnetic conductive part includes a plurality of sub-magnetic conductive parts, and the plurality of sub-magnetic conductive parts are arranged along the radial direction and / or circumferential direction of the rotor.

[0033] In some embodiments of this application, the rotor has multiple magnetic poles, and each magnetic pole is provided with a magnetic conductive part.

[0034] In some embodiments of this application, one end of the magnetically conductive portion near the magnetically conductive element extends out of the rotor body, or the surface of the magnetically conductive portion near the magnetically conductive element is flush with the surface of the rotor body near the magnetically conductive element.

[0035] In some embodiments of this application, the magnetic conductive part is a permanent magnet or a soft magnetic part; and / or, the magnetic conductive part is a permanent magnet or a soft magnetic part.

[0036] In some embodiments of this application, the magnetizing assembly further includes a first housing, the first housing being open on the side facing the rotor, and the motor further includes: a second housing, the second housing and the first housing forming a housing, a stator, the stator and the rotor being disposed within the housing, and the rotor being disposed on the radially inner side and / or radially outer side of the stator.

[0037] The vehicle according to an embodiment of this application includes an electric drive system, which includes the motor described above.

[0038] According to the vehicle embodiment of this application, an electric drive system is provided. The magnetic guide of the magnetic adjustment component is adapted to be movably disposed at at least one end of the rotor's axial direction to adjust the magnetic flux through the rotor. The magnetic guide is connected to the magnetic guide through an actuating component to adjust the position of the magnetic guide relative to the rotor, thereby changing the magnetic flux of the magnetic flux short-circuit loop formed by the magnetic guide and the rotor, and thus realizing the adjustment of the magnetic flux of the main magnetic field. The adjustment is convenient, so that the motor can have the advantages of both constant torque region and constant power region. While ensuring high torque density and power density, it effectively widens the constant power operation region and high efficiency region, and achieves a high degree of matching between the high efficiency region of the motor and the operating point of the vehicle, thereby reducing the vehicle's power consumption and improving economy. Attached Figure Description

[0039] Figure 1 is a cross-sectional view of a motor according to an embodiment of this application;

[0040] Figure 2 is an enlarged view of point A in Figure 1;

[0041] Figure 3 is a top view of the rotor core according to the first embodiment of this application;

[0042] Figure 4 is a top view of the rotor core and permanent magnet according to the first embodiment of this application;

[0043] Figure 5 is a top view of the rotor core according to the second embodiment of this application;

[0044] Figure 6 is a top view of the rotor core and permanent magnet according to the second embodiment of this application;

[0045] Figure 7 is a structural diagram of a magnetic shielding plate according to an embodiment of this application;

[0046] Figure 8 is a schematic diagram of a vehicle according to an embodiment of this application.

[0047] Reference numerals: 1000, vehicle; 100, motor; 10, housing; 11, limiting component; 12, first housing; 13, second housing; 20, rotor; 21, rotor body; 211, rotor core; 2111, first magnetic guide groove; 2112, first shaft hole; 2113, magnet groove; 212, magnetic shielding plate; 2121, second magnetic guide groove; 2122, second shaft hole; 213, rotor lamination; 22, magnetic guide part; 23, permanent magnet; 30, magnetic adjustment assembly; 31, magnetic guide component; 311, magnetic guide sheet; 32, actuating component; 321, moving cavity; 322, magnetic adjustment slip ring; 3221, groove; 323, elastic component; 33, sealing ring; 40, rotating shaft; 50, stator; 51, stator core; 52, stator winding. Detailed Implementation

[0048] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0049] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] The magnetizing assembly 30 according to an embodiment of this application is described below with reference to the accompanying drawings.

[0052] As shown in Figures 1 and 2, the magnetic adjustment component 30 according to the embodiment of this application can be used in a motor 100. The motor 100 includes a rotor 20, and the magnetic adjustment component 30 includes a magnetic conductor 31 and an actuating component 32.

[0053] The magnetic conductor 31 is adapted to be movably disposed at at least one end of the rotor 20 along the axial direction to adjust the magnetic flux through the rotor 20. The actuating component 32 is connected to the magnetic conductor 31 and is used to adjust the position of the magnetic conductor 31 relative to the rotor 20.

[0054] Understandably, when the motor 100 is running, the permanent magnet magnetic field generated by the permanent magnet 23 on the rotor 20 flows to the stator 50, and the effective magnetic field is called the "main magnetic field". Since the total magnetic flux of the permanent magnet magnetic field generated by the permanent magnet 23 on the rotor 20 is constant, a magnetic flux short-circuit loop is formed through the rotor 20 and the magnetic conductor 31, so that the total magnetic flux of the permanent magnet magnetic field can flow to the main magnetic field and the magnetic flux short-circuit loop respectively. The position of the magnetic conductor 31 relative to the rotor 20 is adjusted by the actuating component 32 to adjust the magnetic flux through the rotor 20, thereby realizing the adjustment of the magnetic flux of the magnetic flux short-circuit loop. The adjustment is convenient, and thus the magnetic flux of the main magnetic field can be adjusted. In this way, the motor 100 can have the advantages of both constant torque region and constant power region, and while ensuring high torque density and power density, it can effectively broaden the constant power operation region and the high efficiency region.

[0055] Meanwhile, the magnetic adjustment component 30 adjusts the magnetic flux through the rotor 10 to meet the magnetic adjustment requirements of the motor 100, avoiding the problem of overcoming large axial forces due to axial movement of the rotor or stator in related technologies, making magnetic adjustment more convenient.

[0056] Furthermore, when the motor 100 is operating under heavy load, the magnetic flux of the main magnetic field is increased by the magnetic adjustment component 30, thereby increasing the permanent magnet flux linkage and increasing torque output. In addition, by improving the high-efficiency region of the motor 100, a high degree of matching between the high-efficiency region of the motor 100 and the operating point of the new energy vehicle is achieved, thereby reducing the power consumption of the new energy vehicle and improving its economy.

[0057] The magnetic guide element 31 is movably disposed at at least one axial end of the rotor 20. It is understood that both ends of the rotor 20 in the axial direction are provided with magnetic adjustment components 30. This arrangement enables the formation of two magnetic flux short-circuit loops, thereby improving the magnetic flux adjustment capability of the main magnetic flux and eliminating axial unbalanced magnetic pull, further improving the reliability of the motor 100. Alternatively, as shown in Figure 1, the magnetic adjustment component 30 is provided at one axial end of the rotor 20. This arrangement achieves magnetic flux adjustment of the main magnetic flux while reducing costs.

[0058] For example, in the low-speed region, the position of the magnetic conductor 31 relative to the rotor 20 is adjusted by the actuating component 32 to move the magnetic conductor 31 away from the rotor 20, thereby reducing the magnetic flux in the short-circuit loop, increasing the magnetic flux of the main magnetic flux, and thus increasing the no-load back EMF, thereby increasing the torque performance and power performance in the low-speed region. In the high-speed region, the position of the magnetic conductor 31 relative to the rotor 20 is adjusted by the actuating component 32 to move the magnetic conductor 31 closer to the rotor 20, thereby increasing the magnetic flux in the short-circuit loop, reducing the magnetic flux of the main magnetic flux, and thus reducing the no-load back EMF, thereby reducing the losses of the rotor 20 and stator 50, widening the constant power region, increasing the peak torque / power in the high-speed region, and effectively preventing overvoltage damage to power devices in the inverter using the motor 100, adding a layer of protection to the electric drive system. Thus, the magnetic flux of the main magnetic flux is adjusted in real time by the magnetic adjustment component 30, thereby achieving real-time control of the no-load back EMF and voltage of the motor 100.

[0059] In addition, the motor 100 is connected to the controller. When the motor 100 is in the medium-high speed range, the magnetic flux of the main magnetic flux is adjusted by the magnetic adjustment component 30. This reduces the need to adjust the magnetic flux of the main magnetic flux through the armature direct shaft weakening magnetic current of the controller, thereby reducing the risk of irreversible demagnetization of the permanent magnet 23 and improving the reliability of the motor 100.

[0060] According to the magnetic adjustment component 30 of this application embodiment, the magnetic guide 31 is adapted to be movably disposed at at least one end of the rotor 20 along the axial direction to adjust the magnetic flux through the rotor 20. The actuating component 32 is connected to the magnetic guide 31 to adjust the position of the magnetic guide 31 relative to the rotor 20, thereby changing the magnetic flux of the magnetic flux short circuit loop formed by the magnetic guide 31 and the rotor 20, and thus realizing the adjustment of the magnetic flux of the main magnetic field. The adjustment is convenient, so that the motor 100 using the magnetic adjustment component 30 has the advantages of both constant torque region and constant power region, and effectively expands the constant power operation region and high efficiency region while ensuring high torque density and power density.

[0061] In some embodiments of this application, as shown in Figures 1 and 2, the magnetic conductor 31 can move along the axial direction of the rotor 20. Thus, the actuating component 32 adjusts the position of the magnetic conductor 31 relative to the rotor 20 along the axial direction of the rotor 20, thereby adjusting the axial distance between the magnetic conductor 31 and the rotor 20. This allows for the adjustment of the magnetic flux in the short-circuit loop, and consequently, the adjustment of the magnetic flux in the main magnetic field. This enables the motor 100 to possess the advantages of both constant torque and constant power regions, effectively expanding the constant power operating region and the high-efficiency region while ensuring high torque and power density.

[0062] Specifically, the magnetic conductor 31 can have a first state and a second state. In the first state, the distance between the magnetic conductor 31 and the rotor 20 along the axial direction of the rotor 20 is the smallest, and the magnetic conductor 31 and the rotor 20 are spaced apart in the axial direction of the rotor 20. The magnetic conductor 31 is in the first position. At this time, the magnetic flux of the magnetic flux short-circuit loop formed by the magnetic conductor 31 and the rotor 20 is the largest. Moreover, the separation of the magnetic conductor 31 and the rotor 20 in the axial direction of the rotor 20 effectively avoids motion interference between the magnetic conductor 31 and the rotor 20, improving reliability. In the second state, the distance between the magnetic conductor 31 and the rotor 20 along the axial direction of the rotor 20 is the largest, and the magnetic conductor 31 is in the second position. The magnetic flux of the magnetic flux short-circuit loop formed by the magnetic conductor 31 and the rotor 20 is the smallest. Thus, by driving the magnetic conductor 31 to move between the first position and the second position through the actuating component 32, the magnitude of the magnetic flux of the magnetic flux short-circuit loop is adjusted, thereby realizing the adjustment of the magnitude of the magnetic flux of the main magnetic field. It should be noted that when the magnetic conductor 31 is in the second position, the magnetic flux of the short-circuit loop can be zero.

[0063] In some embodiments of this application, the magnetic conductor 31 extends in a ring shape along the circumferential direction of the rotor 20. It is understood that, as the rotor 20 rotates around its axis, the magnetic conductor 31 moves along the axial direction of the rotor 20. By extending the magnetic conductor 31 in a ring shape along the circumferential direction of the rotor 20, a magnetic flux short-circuit loop is formed between the magnetic conductor 31 and the rotor 20, thereby ensuring the magnetic flux modulation effect of the magnetic flux modulation assembly 30 on the main magnetic flux.

[0064] In some embodiments, the magnetic conductor 31 can move circumferentially along the rotor 20, that is, the actuating component 32 can drive the magnetic conductor 31 to move along the circumferential and axial directions of the rotor, thereby causing the magnetic conductor 31 to move closer to or further away from the rotor 20 along the axial direction. Adjusting the distance between the magnetic conductor 31 and the rotor 20 along the axial direction of the rotor 20 realizes the adjustment of the magnetic flux through the rotor 20, thereby enabling the simultaneous adjustment of the axial facing area of ​​the magnetic conductor 31 and the magnetic conductor 22 and the magnetic flux through the rotor 20, which can meet different adjustment requirements.

[0065] In some embodiments, the magnetic conductor 31 can move radially along the rotor 20, that is, the actuating component 32 can drive the magnetic conductor 31 to move along the radial and axial directions of the rotor, thereby causing the magnetic conductor 31 to move closer to or further away from the rotor 20 along the axial direction. Adjusting the distance between the magnetic conductor 31 and the rotor 20 along the axial direction of the rotor 20 realizes the adjustment of the magnetic flux through the rotor 20, thereby enabling the simultaneous adjustment of the axial facing area of ​​the magnetic conductor 31 and the magnetic conductor 22 and the magnetic flux through the rotor 20, which can meet different adjustment requirements.

[0066] In some embodiments, when the magnetic conductor 31 moves along the axial direction of the rotor 20, the magnetic conductor 31 can move circumferentially and radially along the rotor 20. That is, the actuating component 32 can drive the magnetic conductor 31 to achieve spiral lifting and other moving paths, which can meet different adjustment requirements.

[0067] In some embodiments of this application, as shown in Figures 1 and 2, the magnetic adjustment assembly 30 further includes a first housing 12. The side of the first housing 12 facing the rotor 20 is open. The magnetic conductor 31 and the actuating component 32 are both located inside the first housing 12, which facilitates the magnetic conductor 31 to be movably disposed at at least one end of the rotor body 21 in the axial direction. The first housing 12 can protect the magnetic conductor 31 and the actuating component 32, and the first housing 12 can provide support for the actuating component 32, which facilitates the installation of the actuating component 32 and ensures that the actuating component 32 drives the magnetic conductor 31 to move smoothly in the axial direction of the rotor body 21, thereby improving the reliability of the motor 100.

[0068] In some embodiments of this application, as shown in Figures 1 and 2, a movable cavity 321 is provided in the first housing 12, and an actuating component 32 includes a magnetic adjustment slip ring 322. The magnetic adjustment slip ring 322 can move along the axial direction of the rotor body 21 under the push of the medium in the movable cavity 321. The magnetic conductor 31 is connected to the end of the magnetic adjustment slip ring 322 facing the rotor 20.

[0069] Therefore, the medium in the moving cavity 321 can push the magnetic adjustment slip ring 322 to move along the axial direction of the rotor body 21, thereby enabling the magnetic adjustment slip ring 322 to drive the magnetic conductor 31 to move along the axial direction of the rotor body 21, satisfying the movement requirements of the magnetic conductor 31, thus realizing the magnetic adjustment of the motor 100, ensuring that the magnetic adjustment slip ring 322 is subjected to uniform force, making the magnetic adjustment reliable, and the medium in the moving cavity 321 can cool the motor 100, effectively reducing the heat generation of the rotor 20, which is conducive to extending the service life and improving the magnetic adjustment efficiency.

[0070] Furthermore, as shown in Figures 1 and 2, the driving force of the medium is transmitted to the magnetic conductor 31 through the magnetic adjustment slip ring 322, so that the magnetic conductor 31 can move along the axial direction of the rotor body 21. This avoids the magnetic conductor 31 extending into the moving cavity 321, which would cause structural complexity. It also facilitates the processing and manufacturing of the magnetic conductor 31, and allows for the selection of materials for the magnetic adjustment slip ring 322 and the magnetic conductor 31 to meet different material requirements. While meeting the usage requirements, it is beneficial to reduce production costs.

[0071] According to some embodiments of this application, the first housing 12 is provided with an oil port, which is located on the side of the magnetic adjustment slip ring 322 away from the rotor body 21. The oil port communicates with the moving cavity 321, enabling the connection between the moving cavity 321 and the hydraulic actuator. This allows the medium flowing out of the hydraulic actuator to enter the moving cavity 321 through the oil port, meeting the fluid supply requirements of the moving cavity 321. This results in a simple structure that is easy to manufacture. Simultaneously, the oil port's location on the first housing 12 facilitates its manufacturing, ensuring a compact structure and convenient assembly of the magnetic adjustment slip ring 322.

[0072] Furthermore, by adjusting the pressure of the medium through the hydraulic actuator, the magnetic conductor 31 can be adjusted at any position in the axial direction of the rotor body 21, thereby enabling stepless magnetic adjustment of the motor 100, ensuring magnetic adjustment accuracy, and allowing real-time adjustment of the position of the magnetic conductor 31 to ensure reliable adjustment.

[0073] In some embodiments, the motor 100 can be an oil-cooled motor, and the hydraulic actuator is an internal structure of the motor 100. It can directly drive the cooling oil in the oil-cooled motor into the moving cavity 321 to meet the liquid supply requirements of the moving cavity 321, thereby achieving the magnetic adjustment of the motor 100. No additional device needs to be added to the motor 100, which can avoid additional energy consumption, simplify the structure, and help reduce costs.

[0074] In some embodiments, when the motor 100 is applied to the vehicle 1000, the magnetic flux of the main magnetic field can be adjusted by the magnetic adjustment component 30 to meet different adjustment requirements. For example, when the magnetic adjustment component 30 increases the magnetic flux of the main magnetic field, it can improve the high-efficiency region of the motor 100, achieving a high degree of matching between the high-efficiency region of the motor 100 and the operating point of the vehicle 1000, thereby reducing the power consumption of the vehicle 1000 and improving its economy. For example, the vehicle is a new energy vehicle.

[0075] In addition, the hydraulic actuator can be the internal structure of the electric drive system of the vehicle 1000. It can directly drive the cooling oil in the electric drive system into the moving cavity 321 to meet the fluid supply needs of the moving cavity 321, thereby realizing the magnetic adjustment of the motor 100. There is no need to add an extra device to the motor 100, which can avoid extra energy consumption and make the structure simple, which is conducive to reducing costs.

[0076] According to some embodiments of this application, as shown in Figures 1 and 2, the actuating component 32 further includes an elastic element 323, which is connected to the magnetic adjustment slip ring 322. For example, the magnetic adjustment slip ring 322 has an elastic element 323 on at least one side of its two sides along the axial direction of the rotor body 21. The elastic element 323 can drive the magnetic adjustment slip ring 322 to move in an axial direction away from the rotor 20, thereby allowing the magnetic adjustment slip ring 322 to drive the magnetic conductor 31 to move in a direction away from the rotor 20, satisfying the movement requirements of the magnetic conductor 31, realizing the magnetic adjustment of the motor 100, and ensuring reliable magnetic adjustment. Thus, the magnetic adjustment of the motor 100 has a combined action mode of active and passive action. The active magnetic adjustment is hydraulic magnetic adjustment, and the passive magnetic adjustment is achieved by relying on the elastic potential energy of the elastic element 323, making the magnetic adjustment of the motor 100 simple and reliable. For example, the elastic element 323 can be a spring, etc.

[0077] In some embodiments of this application, the elastic element 323 is located inside the moving cavity 321 and is located on the side of the magnetic adjustment slip ring 322 away from the rotor 20. The two ends of the elastic element 323 are respectively connected to the magnetic adjustment slip ring 322 and the surface of the moving cavity 321 away from the rotor 20, making the structure compact.

[0078] Therefore, when the motor 100 needs magnetic adjustment, the medium within the moving cavity 321 can push the magnetic adjustment slip ring 322 towards the rotor body 21, thereby causing the magnetic adjustment slip ring 322 to move the magnetic conductor 31 towards the rotor body 21, moving the magnetic conductor 31 to the desired position, and stretching the elastic element 323. When the motor 100 does not need magnetic adjustment or needs to control the magnetic conductor 31 to move away from the rotor body 21, the elastic element 323 releases its elastic potential energy, causing the elastic element 323 to pull the magnetic adjustment slip ring 322 away from the rotor body 21, satisfying the required control needs. For example, the elastic element 323 can pull the magnetic adjustment slip ring 322 back to the furthest position along the axial direction of the rotor body 21, achieving the requirement that the motor 100 does not need magnetic adjustment.

[0079] Alternatively, the elastic element 323 is located on the side of the magnetic adjustment slip ring 322 facing the rotor 20, and the two ends of the elastic element 323 are respectively connected to the magnetic adjustment slip ring 322 and the surface of the first housing 12 near the rotor 20, making the structure compact.

[0080] Therefore, when the motor 100 needs magnetic adjustment, the medium within the moving cavity 321 can push the magnetic adjustment slip ring 322 towards the rotor body 21, thereby causing the magnetic guide 31 to move towards the rotor body 21, moving it to the desired position, and compressing the elastic element 323. When the motor 100 does not need magnetic adjustment or needs to control the magnetic guide 31 to move away from the rotor body 21, the elastic element 323 releases its elastic potential energy, causing it to push the magnetic adjustment slip ring 322 away from the rotor body 21, thus meeting the required control needs. For example, the elastic element 323 can push the magnetic adjustment slip ring 322 back to the furthest position along the axial direction of the rotor body 21, enabling the motor 100 to not need magnetic adjustment.

[0081] According to some embodiments of this application, as shown in Figures 1 and 2, a limiting member 11 is provided on the first housing 12. For example, the limiting member 11 can be located on the side of the moving cavity 321 facing the rotor body 21, and the elastic member 323 is located on the side of the magnetic adjustment slip ring 322 facing the rotor body 21. The two ends of the elastic member 323 are respectively connected to the magnetic adjustment slip ring 322 and the limiting member 11, which facilitates the limiting of the elastic member 323, ensures that the positioning of the elastic member 323 is reliable, and makes the structure compact.

[0082] Therefore, when the motor 100 needs magnetic adjustment, the medium within the moving cavity 321 can push the magnetic adjustment slip ring 322 towards the rotor body 21, thereby causing the magnetic guide 31 to move towards the rotor body 21, moving it to the desired position, and compressing the elastic element 323. When the motor 100 does not need magnetic adjustment or needs to control the magnetic guide 31 to move away from the rotor body 21, the elastic element 323 releases its elastic potential energy, causing it to push the magnetic adjustment slip ring 322 away from the rotor body 21, thus meeting the required control needs. For example, the elastic element 323 can push the magnetic adjustment slip ring 322 back to the furthest position along the axial direction of the rotor body 21, enabling the motor 100 to not need magnetic adjustment.

[0083] According to some embodiments of this application, as shown in Figures 1 and 2, the magnetic adjustment slip ring 322 has a groove 3221 on the side facing the rotor 20 (e.g., the lower side shown in Figure 2). The magnetic conductor 31 is disposed in the groove 3221, which can realize the connection between the magnetic conductor 31 and the magnetic adjustment slip ring 322, ensuring that the magnetic conductor 31 is reliably fixed on the magnetic adjustment slip ring 322, which can meet the required connection requirements, and the structure is simple and easy to process and manufacture.

[0084] In some embodiments of this application, as shown in FIG2, a sealing ring 33 is provided between the peripheral wall of the magnetic adjustment slip ring 322 and the peripheral wall of the moving cavity 321. For example, a sealing ring 33 is provided between the outer peripheral wall of the magnetic adjustment slip ring 322 and the inner peripheral wall of the moving cavity 321. The sealing ring 33 can seal the gap between the outer peripheral wall of the magnetic adjustment slip ring 322 and the inner peripheral wall of the moving cavity 321, preventing the medium in the moving cavity 321 from flowing out between the outer peripheral wall of the magnetic adjustment slip ring 322 and the inner peripheral wall of the moving cavity 321, ensuring reliable sealing and guaranteeing the magnetic adjustment accuracy of the motor 100.

[0085] In some embodiments of this application, the magnetizing assembly 30 further includes a displacement sensor for detecting the axial distance between the magnetic conductor 31 and the rotor 20. When the actuating component 32 drives the magnetic conductor 31 to move along the axial direction of the rotor body 21, the displacement sensor can measure the displacement of the magnetic conductor 31 in real time, thereby achieving precise control of the position of the magnetic conductor 31, improving the magnetizing accuracy of the magnetizing assembly 30, and further improving the reliability of the motor 100.

[0086] In some embodiments of this application, the magnetic conductor 31 is formed by winding magnetic sheets 311 around the axis of the rotor body 21. Thus, the gaps between the magnetic sheets 311 can block a certain amount of current, thereby reducing iron loss and further improving the efficiency of the motor 100. For example, the magnetic conductor 31 can be made of steel sheets, which ensures the magnetic conductivity of the magnetic conductor 31 and reduces costs.

[0087] The motor 100 of this application embodiment is described below.

[0088] According to an embodiment of this application, the motor 100 includes a rotor 20 and a magnetic adjustment assembly 30. When the motor 100 is running, the effective magnetic field generated by the permanent magnet 23 on the rotor 20 flowing to the stator 50 is called the "main magnetic field". Since the total magnetic flux of the permanent magnet 23 generated on the rotor 20 is constant, a magnetic flux short-circuit loop is formed through the rotor 20 and the magnetic conductor 31, so that the total magnetic flux of the permanent magnet can flow to the main magnetic field and the magnetic flux short-circuit loop respectively. By adjusting the position of the magnetic conductor 31 relative to the rotor 20 through the actuating component 32, the magnetic flux of the magnetic flux short-circuit loop is adjusted, thereby adjusting the magnetic flux of the main magnetic field. Thus, the motor 100 has the advantages of both constant torque and constant power regions, and while ensuring high torque density and power density, it effectively expands the constant power operation region and the high efficiency region.

[0089] According to the embodiment of this application, the motor 100 is provided with a magnetic adjustment component 30. The magnetic guide 31 is adapted to be movably disposed at at least one end of the axial direction of the rotor 20 to adjust the magnetic flux through the rotor 20. The actuator 32 is connected to the magnetic guide 31 to adjust the position of the magnetic guide 31 relative to the rotor 20, thereby changing the magnetic flux of the magnetic flux short circuit loop formed by the magnetic guide 31 and the rotor 20, thereby realizing the adjustment of the magnetic flux of the main magnetic field. The adjustment is convenient, so that the motor 100 can have the advantages of both constant torque region and constant power region, and effectively expand the constant power operation region and high efficiency region while ensuring high torque density and power density.

[0090] In some embodiments of this application, as shown in FIG1 and FIG2, the rotor 20 includes a rotor body 21 and a magnetic conductive part 22, the magnetic conductive part 22 being disposed within the rotor body 21.

[0091] It is understandable that the magnetically conductive part 22 has good magnetic permeability in both the axial and radial directions of the rotor 20, and the magnetically conductive element 31 has high magnetic permeability in the axial direction of the rotor 20, so that the magnetically conductive part 22 and the magnetically conductive element 31 form a magnetic flux short-circuit loop.

[0092] When the motor 100 is running, the permanent magnet magnetic field generated by the permanent magnet 23 on the rotor 20 flows to the stator 50, which is called the "main magnetic field". Since the total magnetic flux of the permanent magnet magnetic field generated by the permanent magnet 23 on the rotor 20 is constant, a magnetic flux short-circuit loop is formed through the magnetic guide part 22 and the magnetic guide element 31, so that the total magnetic flux of the permanent magnet magnetic field can flow to the main magnetic field and the magnetic flux short-circuit loop respectively. By adjusting the axial distance between the magnetic guide element 31 and the magnetic guide part 22 of the rotor 20 through the actuating component 32, the magnetic flux of the magnetic flux short-circuit loop can be adjusted, thereby adjusting the magnetic flux of the main magnetic field. Thus, the motor 100 has the advantages of both constant torque and constant power regions, and while ensuring high torque density and power density, it effectively expands the constant power operation region and the high efficiency region.

[0093] Meanwhile, when the motor 100 is under heavy load, the magnetic flux of the main magnetic field is increased by the magnetic adjustment component 30, thereby increasing the permanent magnet flux linkage and increasing torque output. In addition, by improving the high-efficiency region of the motor 100, a high degree of matching between the high-efficiency region of the motor 100 and the operating point of the new energy vehicle is achieved, thereby reducing the power consumption of the new energy vehicle and improving its economy.

[0094] Specifically, the magnetic conductor 31 can have a first state and a second state. In the first state, the distance between the magnetic conductor 31 and the magnetic conductor 22 along the axial direction of the rotor 20 is minimal, and the magnetic conductor 31 and the magnetic conductor 22 are spaced apart in the axial direction of the rotor 20. The magnetic conductor 31 is in the first position. At this time, the magnetic flux of the magnetic flux short-circuit loop formed by the magnetic conductor 31 and the magnetic conductor 22 is maximized. Furthermore, the separation of the magnetic conductor 31 and the magnetic conductor 22 in the axial direction of the rotor 20 effectively avoids motion interference between the magnetic conductor 31 and the rotor 20, improving reliability. In the second state, the distance between the magnetic conductor 31 and the magnetic conductor 22 along the axial direction of the rotor 20 is maximized, and the magnetic conductor 31 is in the second position. The magnetic flux of the magnetic flux short-circuit loop formed by the magnetic conductor 31 and the magnetic conductor 22 is minimized. Thus, by driving the magnetic conductor 31 to move between the first and second positions through the actuating component 32, the magnitude of the magnetic flux of the magnetic flux short-circuit loop is adjusted, thereby adjusting the magnitude of the magnetic flux of the main magnetic field. It should be noted that when the magnetic conductor 31 is in the second position, the magnetic flux of the short-circuit loop can be zero.

[0095] The magnetic guide element 31 is disposed at at least one end of the rotor 20 along the axial direction. The actuating component 32 is connected to the magnetic guide element 31 and is used to drive the magnetic guide element 31 to move closer to or away from the magnetic guide part 22 of the rotor 20 along the axial direction. This adjusts the distance between the magnetic guide element 31 and the magnetic guide part 22 along the axial direction of the rotor 20, thereby changing the magnetic flux of the magnetic flux short circuit loop formed by the magnetic guide element 31 and the magnetic guide part 22. This allows for the adjustment of the magnetic flux of the main magnetic field, so that the motor 100 can have the advantages of both constant torque and constant power regions. While ensuring high torque density and power density, it can effectively broaden the constant power operation region and the high efficiency region.

[0096] In some embodiments of this application, as shown in Figures 1-6, the rotor body 21 includes a rotor core 211. The rotor core 211 has multiple (two or more) first magnetic grooves 2111 and multiple (two or more) magnetic grooves 2113. The multiple first magnetic grooves 2111 and the multiple magnetic grooves 2113 penetrate the rotor core 211 along the axial direction of the rotor core 211. The magnetic part 22 is disposed in the first magnetic groove 2111, and the permanent magnet 23 is disposed in the magnetic groove 2113. This enables the placement of multiple magnetic parts 22 and multiple permanent magnets 23, ensuring that the magnetic parts 22 and permanent magnets 23 are reliably placed on the rotor core 211.

[0097] In some embodiments, the permanent magnet 23 can be a ferrite component, a neodymium iron boron component, or a samarium cobalt component. Since ferrite, neodymium iron boron, and samarium cobalt are all magnetic materials, the permanent magnet 23 of the ferrite component, neodymium iron boron component, or samarium cobalt component can generate a permanent magnetic field during the rotation of the rotor body 21, which can meet the working requirements of the motor 100 and the usage requirements of the motor 100 in different environments.

[0098] In the embodiments of this application, the specific structure of the magnet groove 2113 can be set according to the actual situation. For example, the magnet groove 2113 can be formed into an arc-shaped hole or a square hole as shown in Figure 6, which can meet the placement requirements of different permanent magnets 23, thereby meeting different usage requirements.

[0099] For example, in some embodiments, as shown in Figures 3-6, the shape of the magnet slot 2113 in the cross section perpendicular to the axis of the rotor body 21 can be "-", "V", "U" or "W", which can meet the placement requirements of the permanent magnet 23, thereby achieving the magnetic field strength requirements of the motor 100.

[0100] In some embodiments, as shown in Figures 3-6, there can be multiple (two or more) magnetic slots 2113, which are spaced apart along the circumferential direction of the rotor body 21. The permanent magnets 23 are multiple, each corresponding to one of the magnetic slots 2113, and the multiple magnetic slots 2113 form a group. In a cross-section perpendicular to the axis of the rotor body 21, the shape of a group of multiple magnetic slots 2113 can be "-", "V", "U", or "W" shaped, or they can be combined to form "-", "V", "U", or "W" shapes, or they can be combined to form "-", "V", "U", or "W" shapes respectively. All of these methods can meet the placement requirements of the permanent magnets 23 and achieve the required magnetic field strength of the motor 100. For example, a group of multiple magnetic steel grooves 2113 can be formed into "V+V", "-+V", "V+U" type, etc.

[0101] In some embodiments, as shown in Figures 5 and 6, the multiple magnetic slots 2113 can be formed into multiple groups (more than or equal to two groups). The multiple groups of magnetic slots 2113 are arranged at intervals along the radial direction of the rotor body 21, which can meet the arrangement requirements of multiple permanent magnets 23, ensure a compact structure, and meet the magnetic field strength requirements of the motor 100.

[0102] According to some embodiments of this application, as shown in Figures 1, 2, and 7, the rotor body 21 further includes a magnetic shielding plate 212. The axial ends of the rotor core 211 are provided with magnetic shielding plates 212, for example, both ends of the rotor core 211 in the axial direction are provided with magnetic shielding plates 212. The magnetic shielding plates 212 can prevent the leakage of the magnetic field generated on the rotor core 211, ensuring the reliable operation of the motor 100. Simultaneously, when the rotor 20 rotates, the magnetic shielding plates 212 can block the permanent magnet 23, preventing the permanent magnet 23 from flying out of the magnetic slot 2113 when the rotor core 211 rotates, ensuring the reliable operation of the motor 100.

[0103] Furthermore, as shown in Figure 7, the magnetic shielding plate 212 has a second magnetic guide groove 2121 that extends through the axial direction. The magnetic guide part 22 is disposed in the first magnetic guide groove 2111 and the second magnetic guide groove 2121, so that the magnetic guide part 22 can extend out of the magnetic shielding plate 212 through the first magnetic guide groove 2111 and the second magnetic guide groove 2121 respectively. This allows the magnetic shielding plate 212 to avoid the magnetic guide part 22 through the second magnetic guide groove 2121, making it easier for the magnetic guide part 22 to extend out of the axial end of the rotor body 21, meeting the required connection requirements. Moreover, the structure is simple and easy to process and manufacture.

[0104] In some embodiments, as shown in FIG1, the rotor core 211 includes multiple (two or more) rotor laminations 213. These multiple rotor laminations 213 are stacked along the axial direction of the rotor body 21, which effectively reduces eddy current losses and increases magnetic flux density, thereby improving the efficiency of the motor 100. Simultaneously, by providing magnetic shielding plates 212 at both ends of the rotor core 211 in the axial direction, the multiple rotor laminations 213 can be pressed together, ensuring reliable connection. For example, the rotor core 211 is formed by stacking multiple rotor laminations 213.

[0105] In some embodiments of this application, the rotor lamination 213 is a soft magnetic component, wherein the rotor lamination 213 is a silicon steel sheet, an amorphous and nanocrystalline alloy, an iron-cobalt component, or a stainless steel component. Therefore, since soft magnetic materials have low coercivity and high permeability, using the rotor lamination 213 as a soft magnetic component can improve the magnetization efficiency of the motor 100 and reduce the energy loss of the motor 100. Simultaneously, since silicon steel sheets, amorphous and nanocrystalline alloys (chemical formula: FeZrNbBCu), iron-cobalt, and stainless steel are all soft magnetic materials, using the rotor lamination 213 as a silicon steel sheet, an amorphous and nanocrystalline alloy, an iron-cobalt component, or a stainless steel component can meet the different needs of the motor 100 and improve its versatility.

[0106] In the embodiments of this application, the specific location of the magnetic conductive part 22 can be set according to the actual situation.

[0107] In some embodiments, as shown in Figures 3-6, the first magnetic guide groove 2111 may be located radially inside the magnet groove 2113; or, the first magnetic guide groove 2111 and the magnet groove 2113 may be spaced apart along the circumferential direction of the rotor body 21; or, the maximum distance between the first magnetic guide groove 2111 and the axis of the rotor body 21 may be less than the minimum distance between the magnet groove 2113 closest to the rotor body 21 and the axis of the rotor body 21. Thus, by defining the positions of the first magnetic guide groove 2111 and the magnet groove 2113, the positions of the magnetic guide part 22 and the permanent magnet 23 within the rotor 20 are defined. This ensures that the magnetic guide part 22 and the magnetic guide element 31 form a magnetic flux short-circuit loop while improving the versatility of the magnetic adjustment assembly 30 to adapt to different forms of motor 100.

[0108] It should be noted that the maximum distance between the first magnetic guide groove 2111 and the axis of the rotor body 21 can be equal to or greater than the minimum distance between the magnetic steel groove 2113 and the axis of the rotor body 21, so that the maximum distance between the magnetic guide part 22 and the axis of the rotor body 21 is equal to or greater than the minimum distance between the permanent magnet 23 and the axis of the rotor body 21, in order to meet the needs of different motors 100.

[0109] In some embodiments of this application, the magnetic conductive part 22 and the rotor core 211 can be an integral piece, which is simple to manufacture, ensures high connection strength between the magnetic conductive part 22 and the rotor core 211, and reduces assembly steps, resulting in high production efficiency.

[0110] According to some embodiments of this application, the rotor core 211 is a skewed rotor. By setting the skewed rotor, the back electromotive force waveform can be optimized, the output torque fluctuation can be reduced, and the electromagnetic noise can be reduced, thereby optimizing the current and voltage waveforms of the motor 100 and improving the NVH (Noise, Vibration, Harshness) quality of the motor 100.

[0111] In some embodiments of this application, an auxiliary groove is provided on the outer peripheral wall of the rotor core 211. The auxiliary groove extends along the axial direction of the rotor body 21, which can optimize the back electromotive force waveform, reduce output torque fluctuation and reduce electromagnetic noise, thereby optimizing the current and voltage waveforms of the motor 100 and improving the NVH quality of the motor 100.

[0112] In some embodiments, there may be multiple auxiliary slots (two or more), and the multiple auxiliary slots are spaced apart along the circumferential direction of the rotor body 21, which can further improve the NVH quality of the motor 100.

[0113] It should be noted that the auxiliary slots are known to those skilled in the art and will not be described in detail here.

[0114] According to some embodiments of this application, as shown in FIG3, there are multiple magnetic conductive parts 22 (more than or equal to two). The multiple magnetic conductive parts 22 are spaced apart along the circumferential direction of the rotor 20. The multiple magnetic conductive parts 22 can ensure reliable cooperation with the magnetic adjustment assembly 30 and ensure the reliability of magnetic adjustment.

[0115] In some embodiments of this application, as shown in FIG3, each magnetic conductive part 22 includes multiple sub-magnetic conductive parts, which are arranged along the radial direction and / or circumferential direction of the rotor 20, so that the multiple sub-magnetic conductive parts can be installed in the rotor body 21 respectively, which facilitates the assembly of the rotor 20 and facilitates processing and manufacturing.

[0116] In some embodiments where the rotor core 211 has a plurality of first magnetic grooves 2111 extending along the axial direction, each magnetic part 22 includes a plurality of sub-magnetic parts, so that the plurality of sub-magnetic parts can be installed in the first magnetic grooves 2111 respectively, which facilitates the assembly of the rotor 20.

[0117] In some embodiments, the magnetic conductive part 22 can be a permanent magnet or a soft magnetic part, which can meet the magnetic conductivity requirements of the magnetic conductive part 22 and have good magnetic permeability to meet the required magnetic adjustment requirements. For example, the magnetic conductive part 22 can be a silicon steel sheet, an amorphous and nanocrystalline alloy, an iron-cobalt, a stainless steel, a ferrite, a neodymium iron boron, or a samarium cobalt to meet the needs of different motors 100.

[0118] In some embodiments, the magnetic conductor 31 can be a permanent magnet or a soft magnetic conductor, which can meet the magnetic conduction requirements of the magnetic conductor 31 and have good magnetic permeability to meet the required magnetic adjustment requirements. For example, the magnetic conductor 31 can be a silicon steel sheet, an amorphous and nanocrystalline alloy, an iron-cobalt, a stainless steel, a ferrite, a neodymium iron boron, or a samarium cobalt to meet the needs of different motors 100.

[0119] In some embodiments, the rotor 20 has multiple magnetic poles, each of which is provided with a magnetically conductive part 22. This arrangement ensures that the magnetically conductive part 22 of each magnetic pole forms multiple sub-magnetic flux short-circuit loops with the magnetically conductive element 31, further guaranteeing the magnetic adjustment effect of the magnetic adjustment assembly 30 and improving reliability.

[0120] According to some embodiments of this application, as shown in Figures 1 and 2, the magnetizing assembly 30 includes a first housing 12, which is open on the side facing the rotor 20. The motor 100 also includes a second housing 13 and a stator 50. The second housing 13 and the first housing 12 together form a housing 10. The stator 50 and the rotor 20 are disposed inside the second housing 13. The housing 10 can protect the stator 50 and the rotor 20, preventing them from being exposed and damaged, and ensuring good protection.

[0121] Furthermore, the rotor 20 is located on the radial inner side and / or radial outer side of the stator 50, that is, the rotor 20 is located on the radial inner side of the stator 50, or the rotor 20 is located on the radial outer side of the stator 50, or the rotor 20 is located on both the radial inner side and the radial outer side of the stator 50. This can meet the usage requirements of different motors 100, and the magnetization of the motor 100 can be adjusted through the magnetization adjustment component 30, thus meeting the magnetization adjustment requirements of different motors 100 and facilitating versatility.

[0122] For example, in some embodiments, as shown in Figures 1 and 2, the rotor 20 is inserted inside the stator 50, so that the motor 100 can be formed as an inner rotor motor 100, or the rotor 20 is sleeved outside the stator 50, so that the motor 100 can be formed as an outer rotor motor 100. This meets the usage requirements of different motors 100, and the magnetic adjustment of the motor 100 can be achieved through the magnetic adjustment component 30, which meets the magnetic adjustment requirements of different motors 100 and is conducive to achieving versatility. At the same time, by adjusting the magnetic flux of the magnetic flux short-circuit circuit, the magnetic flux of the stator 50 can be adjusted to meet the magnetic adjustment requirements of the motor 100.

[0123] In some embodiments, as shown in Figures 1 and 2, the stator 50 includes a stator core 51 and a stator winding 52. The stator winding 52 is wound around the stator core 51. When the motor 100 is working, energizing the stator winding 52 causes the rotor 20 to rotate under the magnetic force of the stator 50, thus fulfilling the working requirements of the motor 100. Furthermore, by adjusting the distance between the magnetic adjustment assembly 30 and the magnetic guide 22 along the axial direction of the rotor body 21, the magnetic flux of the short-circuit loop can be changed, thereby adjusting the magnetic flux of the main magnetic field and the inductance of the stator winding 52.

[0124] In some embodiments, as shown in FIG1, the motor 100 further includes a rotating shaft 40, a portion of which is rotatably disposed within the housing 10. The rotor 20 is sleeved on the rotating shaft 40. When the motor 100 is working, the rotor 20 rotates under the action of the magnetic field force, so that the rotor 20 can drive the rotating shaft 40 to rotate, thereby realizing the power output of the motor 100.

[0125] In some embodiments, as shown in Figures 1-7, the rotor body 21 is provided with a first shaft hole 2112, the magnetic shielding plate 212 is provided with a second shaft hole 2122, and the rotating shaft 40 can pass through the first shaft hole 2112 and the second shaft hole 2122, so as to facilitate the connection between the rotating shaft 40 and the rotor body 21 and meet the required connection requirements.

[0126] The vehicle 1000 according to an embodiment of this application is described below.

[0127] As shown in Figure 8, the vehicle 1000 according to an embodiment of this application includes an electric drive system, which includes a motor 100.

[0128] According to an embodiment of this application, a vehicle 1000 is provided with an electric drive system. The magnetic guide 31 of the magnetic adjustment component 30 is adapted to be movably disposed at at least one end of the axial direction of the rotor 20 to adjust the magnetic flux through the rotor 20. The actuator 32 is connected to the magnetic guide 31 to adjust the position of the magnetic guide 31 relative to the rotor 20, thereby changing the magnetic flux of the magnetic flux short circuit loop formed by the magnetic guide 31 and the rotor 20, and thus realizing the adjustment of the magnetic flux of the main magnetic field. The adjustment is convenient, so that the motor 100 can have the advantages of both constant torque region and constant power region. While ensuring high torque density and power density, it effectively widens the constant power operation region and high efficiency region, and achieves a high degree of matching between the high efficiency region of the motor 100 and the operating point of the vehicle 1000, thereby reducing the power consumption of the vehicle 1000 and improving economy.

[0129] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0130] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A magnetic field adjusting assembly, wherein, The magnetizing assembly (30) includes: A magnetic conductor (31), said magnetic conductor (31) being adapted to be movably disposed at at least one axial end of the rotor (20) to adjust the magnetic flux through the rotor (20); and An actuating component (32) is connected to the magnetic conductor (31) and is used to adjust the position of the magnetic conductor (31) relative to the rotor (20).

2. The magnetizing assembly according to claim 1, wherein, The magnetic conductor (31) can move along the axial direction of the rotor (20).

3. The magnetizing assembly according to claim 2, wherein, The magnetic conductor (31) may move circumferentially along the rotor (20); and / or the magnetic conductor (31) may move radially along the rotor (20).

4. The magnetizing assembly according to any one of claims 1-3, wherein, Also includes: A first housing (12) is open to the side facing the rotor (20), and the magnetic conductor (31) and the actuating component (32) are both located inside the first housing (12).

5. The magnetizing assembly according to claim 4, wherein, The first housing (12) has a movable cavity (321), and the actuating component (32) includes: A magnetic adjustment slip ring (322) is adapted to move along the axial direction of the rotor (20) under the push of the medium in the moving cavity (321), and the magnetic conductor (31) is connected to one end of the magnetic adjustment slip ring (322) facing the rotor (20).

6. The magnetizing assembly according to claim 5, wherein, The first housing (12) is provided with an oil port, which is located on the side of the magnetic adjustment slip ring (322) away from the rotor body (21) and is connected to the moving cavity (321).

7. The magnetizing assembly according to claim 5, wherein, The actuating component (32) also includes: An elastic element (323) is connected to the magnetic adjustment slip ring (322) and is used to drive the magnetic adjustment slip ring (322) to move in an axial direction away from the rotor (20).

8. The magnetizing assembly according to claim 7, wherein, The elastic element (323) is located inside the moving cavity (321) and on the side of the magnetic adjustment slip ring (322) away from the rotor (2). The two ends of the elastic element (323) are respectively connected to the magnetic adjustment slip ring (322) and the surface of the moving cavity (321) away from the rotor (2). Alternatively, the elastic element (323) is located on the side of the magnetic adjustment slip ring (322) facing the rotor (2), and the two ends of the elastic element (323) are respectively connected to the magnetic adjustment slip ring (322) and the surface of the first housing (12) near the rotor (2).

9. The magnetizing assembly according to claim 7, wherein, The first housing (12) is provided with a limiting member (11), and the two ends of the elastic member (323) are respectively connected to the magnetic adjustment slip ring (322) and the limiting member (11).

10. The magnetizing assembly according to claim 5, wherein, The magnetic adjustment slip ring (322) has a groove (3221) on the side facing the rotor (20), and the magnetic conductor (31) is disposed in the groove (3221).

11. The magnetizing assembly according to claim 5, wherein, A sealing ring (33) is provided between the peripheral wall of the magnetic adjustment slip ring (322) and the peripheral wall of the moving cavity (321).

12. The magnetizing assembly according to any one of claims 1-11, wherein, The magnetizing assembly (30) also includes: A displacement sensor is used to detect the axial distance between the magnetic conductor (31) and the rotor (20).

13. The magnetizing assembly according to any one of claims 1-12, wherein, The magnetic conductor (31) is formed by winding a magnetic sheet (311) around the axis of the rotor (20).

14. An electric motor, wherein, include: Rotor (20); and The magnetizing assembly (30) according to any one of claims 1-13.

15. The motor according to claim 14, wherein, The rotor (20) includes a rotor body (21) and a magnetic guide (22), the magnetic guide (22) being disposed within the rotor body (21).

16. The motor according to claim 15, wherein, The rotor body (21) includes: a rotor core (211), the rotor core (211) having a plurality of first magnetic grooves (2111) and a plurality of magnetic grooves (2113) extending along the axial direction; the magnetic part (22) is disposed in the first magnetic groove (2111), and the permanent magnet (23) of the rotor (20) is disposed in the magnetic groove (2113).

17. The motor according to claim 16, wherein, The rotor body (21) also includes: The magnetic shielding plate (212) is provided at the axial end of the rotor core (211). The magnetic shielding plate (212) has a second magnetic guide groove (2121) that runs through the axial direction. The magnetic guide part (22) is provided in the first magnetic guide groove (2111) and the second magnetic guide groove (2121).

18. The motor according to claim 16, wherein, The magnetic conductive part (22) and the rotor core (211) are an integral part.

19. The motor according to claim 16, wherein, The rotor core (211) is a skewed rotor.

20. The motor according to claim 16, wherein, The outer peripheral wall of the rotor core (211) is provided with an auxiliary groove extending along the axial direction.

21. The motor according to claim 15, wherein, There are multiple magnetic conductive parts (22), and the multiple magnetic conductive parts (22) are spaced apart along the circumferential direction of the rotor (20).

22. The motor according to claim 21, wherein, Each of the magnetic conductive parts (22) includes a plurality of sub-magnetic conductive parts, which are arranged along the radial and / or circumferential directions of the rotor (20).

23. The motor according to claim 15, wherein, The rotor (20) has multiple magnetic poles, and each magnetic pole is provided with a magnetic conductive part (22).

24. The motor according to any one of claims 15-23, wherein, The magnetic guide part (22) extends out of the rotor body (21) at one end near the magnetic guide element (31). Alternatively, the surface of the magnetic guide part (22) near the magnetic guide element (31) is flush with the surface of the rotor body (21) near the magnetic guide element (31).

25. The motor according to any one of claims 15-23, wherein, The magnetic conductive part (22) is a permanent magnet or a soft magnetic part; And / or, the magnetic conductor (31) is a permanent magnet or a soft magnetic component.

26. The motor according to any one of claims 15-23, wherein, The magnetizing assembly (30) further includes a first housing (12) which is open on the side facing the rotor (20), and the motor (100) further includes: A second housing (13), which together with the first housing (12) forms a housing (10); and The stator (50) and the rotor (20) are disposed within the housing (10), and the rotor (20) is disposed on the radial inner side and / or radial outer side of the stator (50).

27. A vehicle, wherein, include: An electric drive system comprising a motor (100) according to any one of claims 14-26.

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