Electric motor, electric drive system and vehicle

Abstract

A vehicle, the vehicle having an electric motor and an electric drive system comprising the electric motor. The electric motor comprises: a rotor (20), the rotor (20) comprising a rotor body (21) and a magnetically conductive part (22), the magnetically conductive part (22) extending in the axial direction of the rotor body (21) out of an axial end part of the rotor body (21); and a flux regulation assembly (30), the flux regulation assembly (30) being used for changing the radial facing area of the flux regulation assembly (30) and the magnetically conductive part (22).

Description

Electric motors, electric drive systems and vehicles

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese patent applications No. 202410710666X, filed on May 31, 2024, and No. 2024107055066, 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 automotive technology, and more specifically, to an electric motor, an electric drive system, 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.

[0006] Application content

[0007] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide a motor that can easily adjust the magnetic flux of the main magnetic field, and effectively expand the constant power operation range and high efficiency range while ensuring high torque density and power density.

[0008] Another objective of this application is to provide an electric drive system having the aforementioned motor.

[0009] Another objective of this application is to provide a vehicle having the aforementioned electric drive system.

[0010] An electric motor according to an embodiment of this application includes: a rotor, the rotor including a rotor body and a magnetic guide portion, the magnetic guide portion extending along the axial direction of the rotor body and extending beyond the axial end of the rotor body; and a magnetic adjustment assembly, the magnetic adjustment assembly being used to change the radially facing area between the magnetic adjustment assembly and the magnetic guide portion.

[0011] According to the embodiments of this application, the motor extends along the axial direction of the rotor body through the magnetic guide part and extends beyond the axial end of the rotor body. The magnetic adjustment component can form a magnetic flux short circuit loop with the rotor, so that the magnetic flux of the magnetic flux short circuit loop can be changed by changing the radial facing area between the magnetic adjustment component and the magnetic guide part, thereby realizing the adjustment of the magnetic flux of the main magnetic field. The magnetic adjustment is convenient and can meet the usage requirements of the motor. It realizes the advantages of the motor in 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.

[0012] In addition, the motor according to the above embodiments of this application may also have the following additional technical features:

[0013] According to some embodiments of the present application, the motor has the magnetizing assembly movably disposed at at least one axial end of the rotor body.

[0014] According to some embodiments of this application, the magnetic conductive part includes an N-pole magnetic conductive part and an S-pole magnetic conductive part, which are spaced apart along the circumferential direction of the rotor body.

[0015] According to some embodiments of this application, the N-pole magnetic conductive part includes a first magnetic conductive part and a first extension part. The first magnetic conductive part is disposed in the rotor body, and the first extension part is connected to the first magnetic conductive part and extends out of the axial end of the rotor body. The S-pole magnetic conductive part includes a second magnetic conductive part and a second extension part. The second magnetic conductive part is disposed in the rotor body, and the second extension part is connected to the second magnetic conductive part and extends out of the axial end of the rotor body. The magnetic adjustment component is movably disposed between the first extension part and the second extension part to change the radially facing area of ​​the magnetic adjustment component with respect to the N-pole magnetic conductive part and the S-pole magnetic conductive part.

[0016] According to some embodiments of this application, the N-pole magnetic part further includes a first connecting part, which is disposed between the first magnetic part and the first extension and connects the first magnetic part and the first extension; the S-pole magnetic part further includes a second connecting part, which is disposed between the second magnetic part and the second extension and connects the second magnetic part and the second extension.

[0017] According to some embodiments of this application, at least one of the first connecting portion and the second connecting portion is bent toward the radial direction of the rotor body.

[0018] According to some embodiments of this application, one of the first connecting portion and the second connecting portion is bent in a radially inward direction toward the rotor body, and the other is bent in a radially outward direction toward the rotor body.

[0019] According to some embodiments of this application, the N-pole magnetic conductive parts are a plurality of those spaced apart along the circumferential direction of the rotor body, and the first extensions of the plurality of N-pole magnetic conductive parts are formed into annular shapes extending along the circumferential direction of the rotor body; and / or, the S-pole magnetic conductive parts are a plurality of those spaced apart along the circumferential direction of the rotor body, and the second extensions of the plurality of S-pole magnetic conductive parts are formed into annular shapes extending along the circumferential direction of the rotor body.

[0020] According to some embodiments of this application, the magnetic adjustment component includes: a magnetic conductor; and an actuating component, the actuating component being connected to the magnetic conductor and used to adjust the radially facing area of ​​the magnetic conductor and the magnetic part.

[0021] According to some embodiments of this application, the magnetic conductor is movable along the axial direction of the rotor.

[0022] According to 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.

[0023] According to some embodiments of this application, the magnetic adjustment assembly further includes: a first housing, the first housing being open on the side facing the rotor, and the magnetic conductor and the actuating component both being located within the first housing.

[0024] According to 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.

[0025] According to some embodiments of this application, the first housing is provided with a liquid outlet, which is located on the side of the magnetic adjustment slip ring away from the rotor body, and the liquid outlet is in communication with the moving cavity.

[0026] According to some embodiments of this application, the actuating component further includes: an elastic element connected to the magnetic adjustment slip ring, used to drive the magnetic adjustment slip ring to move in an axial direction away from the rotor.

[0027] According to 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, and both ends of the elastic element are respectively connected to the magnetic adjustment slip ring and the surface of the moving cavity away from the rotor; or, the elastic element is located on the side of the magnetic adjustment slip ring facing the rotor, and both ends of the elastic element are respectively connected to the magnetic adjustment slip ring and the surface of the first housing near the rotor.

[0028] According to 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.

[0029] According to 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.

[0030] According to 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.

[0031] According to 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.

[0032] According to some embodiments of this application, the magnetic conductor is formed by winding a magnetic sheet around the axis of the rotor.

[0033] According to 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.

[0034] According to some embodiments of this application, the rotor body includes: a rotor core, the rotor core having a first magnetic groove adapted to install a magnetic part; and a rotor partition, the rotor partition having a partition flow path connected to the first magnetic groove to form a cooling channel.

[0035] According to some embodiments of this application, the first magnetic groove extends along the axial direction of the rotor core, and the rotor partition is disposed at the axial end of the rotor core.

[0036] According to some embodiments of this application, the cooling channel includes: a first channel extending along the axial direction of the rotor core; and a second channel extending along the radial direction of the rotor core, wherein the radially outer end of the second channel is connected to one end of the first channel in the axial direction.

[0037] According to some embodiments of this application, the cooling channel further includes: a third channel, the third channel extending along the radial direction of the rotor core, the radial inner end of the third channel communicating with the other end of the first channel in the axial direction, and the radial outer end of the third channel extending to the outer peripheral wall of the rotor core.

[0038] According to some embodiments of this application, the rotor partition includes a first partition and a second partition, the first partition and the second partition are disposed at both ends of the rotor core in the axial direction, the second flow channel is disposed between one of the first partition and the second partition and the rotor core, and the third flow channel is disposed between the other of the first partition and the second partition and the rotor core.

[0039] According to some embodiments of this application, the cooling channels are a plurality of channels spaced apart along the circumferential direction of the rotor core, and at least two of the cooling channels are located at opposite ends of the rotor core in the axial direction.

[0040] According to some embodiments of this application, the second channel of any two adjacent cooling channels along the circumferential direction of the rotor core is located at opposite ends in the axial direction of the rotor core.

[0041] According to some embodiments of this application, the first partition and the second partition have the same structure and / or dimensions.

[0042] According to some embodiments of this application, at least one of the first partition and the second partition has a first flow channel on the side facing the rotor core, and the first flow channel defines a second flow channel between the first flow channel and the axial end face of the rotor core; and / or, at least one of the first partition and the second partition has a second flow channel on the side away from the rotor core, and the second flow channel is configured as the third flow channel.

[0043] According to some embodiments of this application, the first flow channel is located radially inside the first magnetic groove and communicates with the first magnetic groove.

[0044] According to some embodiments of this application, the first partition plate having the second flow guide groove and / or the second partition plate having a third flow guide groove on the side facing the rotor core, the third flow guide groove being located radially inner to the first magnetic guide groove and communicating with the first flow channel and the first magnetic guide groove, and the second flow guide groove being located radially outer to the first magnetic guide groove and communicating with the first magnetic guide groove.

[0045] According to some embodiments of this application, the magnetic guide part is provided with a clearance hole for connecting the second guide groove and the third guide groove.

[0046] According to some embodiments of this application, the motor further includes: a rotating shaft, the rotor core being sleeved on the rotating shaft, the rotating shaft having a liquid supply channel inside, a liquid supply port communicating with the liquid supply channel being provided on the outer peripheral wall of the rotating shaft, and one end of the cooling channel communicating with the liquid supply port.

[0047] According to some embodiments of this application, the liquid supply ports are two sets spaced apart along the axial direction of the rotating shaft, and the second flow channels located at both ends of the rotor core in the axial direction are respectively connected to the two sets of liquid supply ports.

[0048] According to some embodiments of this application, there are multiple second flow channels located at the same end of the rotor core in the axial direction, and one liquid supply port of the corresponding group is connected to multiple second flow channels; or, there are multiple second flow channels located at the same end of the rotor core in the axial direction, and multiple liquid supply ports of the corresponding group are connected to multiple second flow channels respectively.

[0049] According to some embodiments of this application, the first partition and the second partition are offset from each other by an angle of one rotor pole in the circumferential direction.

[0050] According to some embodiments of this application, the two sets of liquid supply ports are offset by an angle of one rotor pole along the circumferential direction of the rotating shaft.

[0051] According to some embodiments of this application, the cross-sectional area of ​​the liquid supply channel perpendicular to the axial direction of the rotating shaft remains unchanged along the axial direction of the rotating shaft; or, the cross-sectional area of ​​the liquid supply channel perpendicular to the axial direction of the rotating shaft gradually decreases along the axial direction of the rotating shaft.

[0052] According to some embodiments of this application, the rotor core has a plurality of magnetic slots extending along the axial direction, the magnetically conductive part is disposed in the first magnetically conductive slot, and the permanent magnet of the rotor is disposed in the magnetic slot.

[0053] According to some embodiments of this application, the rotor partition has a second magnetic groove that extends through the axial direction, and the magnetic part is disposed in the first magnetic groove and the second magnetic groove.

[0054] According to some embodiments of this application, the magnetic conductive part and the rotor core are an integral piece.

[0055] According to some embodiments of this application, the rotor core is a skewed-pole rotor.

[0056] According to some embodiments of this application, the outer peripheral wall of the rotor core is provided with an auxiliary groove extending along the axial direction of the rotor body.

[0057] According to 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.

[0058] According to some embodiments of this application, each of the magnetic conductive parts 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.

[0059] According to some embodiments of this application, the magnetizing assembly further includes a first housing, the first housing being open on one side facing the rotor, and the motor further includes: a second housing, the second housing and the first housing forming a housing; and a stator, the stator and the rotor being disposed within the housing, the rotor being disposed on the radially inner side and / or radially outer side of the stator.

[0060] According to some embodiments of this application, the rotor partition is a magnetic shielding plate.

[0061] The electric drive system according to an embodiment of this application includes the motor described in an embodiment of this application.

[0062] According to the electric drive system of this application embodiment, the magnetic guide part extends along the axial direction of the rotor body and extends beyond the axial end of the rotor body. The magnetic adjustment component can form a magnetic flux short circuit loop with the rotor, so that the magnetic flux of the magnetic flux short circuit loop can be changed by changing the radial facing area between the magnetic adjustment component and the magnetic guide part, thereby realizing the adjustment of the magnetic flux of the main magnetic field. The magnetic adjustment is convenient and can meet the use requirements of the motor. It realizes the advantages of the motor in 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.

[0063] The vehicle according to an embodiment of this application includes the electric drive system described in an embodiment of this application.

[0064] According to the vehicle of the present application embodiment, the magnetic guide part extends along the axial direction of the rotor body and extends beyond the axial end of the rotor body. The magnetic adjustment component can form a magnetic flux short circuit loop with the rotor, so that the magnetic flux of the magnetic flux short circuit loop can be changed by changing the radial facing area between the magnetic adjustment component and the magnetic guide part, thereby realizing the adjustment of the magnetic flux of the main magnetic field. The magnetic adjustment is convenient and can meet the use requirements of the motor. It realizes the advantages of the motor in 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.

[0065] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0066] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0067] Figure 1 is a cross-sectional view of a motor according to some embodiments of the present application, wherein the cutting plane is a plane perpendicular to the first magnetic part and the second magnetic part and intersects the center line of the rotor.

[0068] Figure 2 is an enlarged structural diagram of point A circled in Figure 1;

[0069] Figure 3 is a schematic diagram of the rotor structure of an electric motor according to some embodiments of this application;

[0070] Figure 4 is a partial structural schematic diagram of the rotor of an electric motor according to some embodiments of this application;

[0071] Figure 5 is a partial structural schematic diagram of the rotor lamination of an electric motor according to some embodiments of this application;

[0072] Figure 6 is a schematic diagram of the structure of the rotor partition of an electric motor according to some embodiments of this application;

[0073] Figure 7 is a cross-sectional view of the rotor of an electric motor according to some embodiments of this application;

[0074] Figure 8 is a cross-sectional view of a motor according to some other embodiments of the present application, wherein the cutting plane is a plane perpendicular to the first magnetic part and the second magnetic part and intersects the center line of the rotor.

[0075] Figure 9 is an enlarged structural diagram of point A circled in Figure 8;

[0076] Figure 10 is an enlarged structural diagram of point B circled in Figure 8;

[0077] Figure 11 is a schematic diagram of the rotor structure of an electric motor according to some other embodiments of this application;

[0078] Figure 12 is a partial structural schematic diagram of the rotor of an electric motor according to some other embodiments of this application;

[0079] Figure 13 is a partial structural schematic diagram of the rotor lamination of an electric motor according to some other embodiments of this application;

[0080] Figure 14 is a structural schematic diagram of one side of the rotor partition of an electric motor according to some other embodiments of this application;

[0081] Figure 15 is a structural schematic diagram of another side of the rotor partition of an electric motor according to some other embodiments of this application;

[0082] Figure 16 is a cross-sectional view of the rotor of an electric motor according to some other embodiments of this application;

[0083] Figure 17 is a schematic diagram of the structure of an electric drive system according to an embodiment of this application;

[0084] Figure 18 is a structural schematic diagram of a vehicle according to an embodiment of this application.

[0085] Reference numerals: 100, motor; 200, electric drive system; 300, vehicle; 10, housing; 11, limiting component; 12, first housing; 13, second housing; 20, rotor; 21, rotor body; 22, magnetic guide section; 23, permanent magnet; 211, rotor core; 212, rotor partition; 213, rotor lamination; 214, second magnetic guide groove; 215, shaft hole; 216, cooling channel; 217, clearance hole; 30, magnetic adjustment assembly; 31, magnetic guide component; 32, actuating component; 33, sealing ring; 321, moving cavity; 322, magnetic adjustment slip ring; 323, elastic component; 324, groove; 41, first magnetic guide groove; 42, magnet slot; 50, stator; 51, stator core; 52, stator winding; 60. Rotating shaft; 61. Liquid supply channel; 62. Liquid supply port; 71. First flow channel; 72. Second flow channel; 73. Third flow channel; 81. First guide groove; 82. Second guide groove; 83. Third guide groove; 91. N-pole magnetic part; 92. S-pole magnetic part; 911. First magnetic part; 912. First extension; 913. First connecting part; 921. Second magnetic part; 922. Second extension; 923. Second connecting part. Detailed Implementation

[0086] 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.

[0087] 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", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are 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.

[0088] In the description of this application, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "first feature above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them, and "first feature above", "above" and "over" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0089] The motor 100 according to an embodiment of this application is described below with reference to the accompanying drawings.

[0090] Referring to Figures 1-7, the motor 100 according to an embodiment of this application may include a rotor 20.

[0091] Specifically, the rotor 20 includes a rotor body 21 and a magnetic guide section 22. The magnetic guide section 22 extends along the axial direction of the rotor body 21 and extends beyond the axial end of the rotor body 21, enabling the connection between the magnetic guide section 22 and the rotor body 21. When the motor 100 is running, the permanent magnet magnetic field generated by the permanent magnet 23 located on the rotor body 21 flows to the stator 50 of the motor 100, and the effective magnetic field is called the "main magnetic field".

[0092] Meanwhile, as shown in Figures 1 and 2, the motor 100 also includes a magnetic adjustment component 30, which can form a magnetic flux short-circuit loop with the rotor 20 and can change the radial facing area between the magnetic adjustment component 30 and the magnetic guide part 22.

[0093] Therefore, since the total magnetic flux of the permanent magnet field generated by the permanent magnet 23 on the rotor body 21 is constant, the total magnetic flux of the permanent magnet field can flow to the main magnetic field and the magnetic flux short-circuit loop respectively. By changing the radial facing area between the magnetic adjustment component 30 and the magnetic guide part 22, the magnetic flux of the magnetic flux short-circuit loop can be changed, thereby realizing the adjustment of the magnetic flux of the main magnetic field and meeting the usage requirements of the motor 100. This allows the motor 100 to have the advantages of both constant torque and constant power regions, and effectively expands the constant power operation range and high efficiency range while ensuring high torque density and power density. At the same time, by changing the radial facing area between the magnetic adjustment component 30 and the magnetic guide part 22, the magnetic adjustment requirements of the motor 100 can be met, 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.

[0094] For example, by adjusting the magnetic flux of the short-circuit loop through the magnetic flux adjustment component 30, the magnetic flux of the main magnetic field of the motor 100 during high-speed operation can be reduced, thereby reducing the negative impact of weak magnetic field (such as copper loss and demagnetization risk caused by large current), and increasing the magnetic flux of the main magnetic field of the motor 100 during heavy-load operation, increasing permanent magnet flux linkage, increasing torque output, and meeting the usage requirements of the motor 100.

[0095] It should be noted that, for ease of description, the terms "up" and "down" in this application are based on the orientation relationships shown in the accompanying drawings, and are not intended to limit the orientation in actual application.

[0096] In some embodiments, the magnetic conductive part 22 is fixed in the first magnetic conductive groove 41 by adhesive bonding, which ensures that the magnetic conductive part 22 is reliably fixed on the rotor core 211, prevents the magnetic conductive part 22 from falling off the rotor core 211, and ensures the working reliability of the motor 100.

[0097] According to the embodiments of this application, the motor 100 extends along the axial direction of the rotor body 21 via the magnetic guide part 22 and extends beyond the axial end of the rotor body 21. The magnetic adjustment component 30 can form a magnetic flux short-circuit loop with the rotor 20, so that the magnetic flux of the magnetic flux short-circuit loop can be changed by changing the radial facing area of ​​the magnetic adjustment component 30 and the magnetic guide part 22, thereby realizing the adjustment of the magnetic flux of the main magnetic field. The magnetic adjustment is convenient and can meet the usage requirements of the motor 100. The motor 100 has the advantages of both constant torque region and constant power region, and while ensuring high torque density and power density, it effectively expands the constant power operation region and high efficiency region.

[0098] According to some embodiments of this application, as shown in FIG1, the magnetizing assembly 30 is movably disposed at at least one end of the rotor body 21 in the axial direction, that is, at least one side of the rotor body 21 in the axial direction is provided with the magnetizing assembly 30, which can reduce costs and ensure a compact structure while achieving magnetizing.

[0099] In some embodiments, magnetic adjustment components 30 are provided on both sides of the rotor body 21 in the axial direction, which can form two magnetic flux short-circuit loops on the motor 100, which is beneficial to improve the magnetic adjustment capability, eliminate axial unbalanced magnetic pull, and improve the reliability of the motor 100.

[0100] In some embodiments of this application, as shown in Figures 1, 2 and 7, the magnetic conductive part 22 includes an N-pole magnetic conductive part 91 and an S-pole magnetic conductive part 92. The N-pole magnetic conductive part 91 and the S-pole magnetic conductive part 92 are spaced apart along the circumferential direction of the rotor body 21, which can realize the connection between the N-pole magnetic conductive part 91 and the S-pole magnetic conductive part 92 and the rotor body 21, realize the requirement of the magnetic adjustment component 30 and the rotor 20 to form a magnetic flux short circuit loop, and make the structure of the magnetic conductive part 22 simple and easy to process and manufacture.

[0101] According to some embodiments of this application, as shown in FIG1, the N-pole magnetic conductive part 91 includes a first magnetic conductive part 911 and a first extension part 912. The first magnetic conductive part 911 is disposed inside the rotor body 21, which enables the connection between the N-pole magnetic conductive part 91 and the rotor body 21. The first extension part 912 is connected to the first magnetic conductive part 911, and the first extension part 912 extends out of the axial end of the rotor body 21, which enables the N-pole magnetic conductive part 91 to extend out of the axial end of the rotor body 21, making the structure simple and easy to process and manufacture.

[0102] As shown in Figures 1, 2 and 7, the S-pole magnetic conductive part 92 includes a second magnetic conductive part 921 and a second extension part 922. The second magnetic conductive part 921 is disposed inside the rotor body 21, which enables the connection between the S-pole magnetic conductive part 92 and the rotor body 21. The second extension part 922 is connected to the second magnetic conductive part 921 and extends out of the axial end of the rotor body 21, which enables the S-pole magnetic conductive part 92 to extend out of the axial end of the rotor body 21, making the structure simple and easy to process and manufacture.

[0103] Meanwhile, as shown in Figures 1 and 2, the magnetic adjustment component 30 is movably disposed between the first extension 912 and the second extension 922, so that the magnetic adjustment component 30 and the rotor 20 can form a short-circuit loop. By changing the radially facing area of ​​the magnetic adjustment component 30 and the N-pole magnetic guide 91 and the S-pole magnetic guide 92, the magnetic flux of the magnetic flux short-circuit loop can be changed, thereby realizing the adjustment of the magnetic flux of the main magnetic field, meeting the usage requirements of the motor 100, and ensuring reliable movement.

[0104] According to some embodiments of this application, as shown in FIG1 and FIG2, the N-pole magnetic conductive part 91 further includes a first connecting part 913. The first connecting part 913 is disposed between the first magnetic conductive part 911 and the first extension part 912, and the first connecting part 913 connects the first magnetic conductive part 911 and the first extension part 912, so that the first magnetic conductive part 911, the first connecting part 913 and the first extension part 912 can be formed as an N-pole, and the structure of the N-pole magnetic conductive part 91 is simple and easy to process and manufacture.

[0105] Furthermore, as shown in Figures 1, 2, and 7, the S-pole magnetic conductive part 92 also includes a second connecting part 923. The second connecting part 923 is disposed between the second magnetic conductive part 921 and the second extension part 922, and the second connecting part 923 connects the second magnetic conductive part 921 and the second extension part 922, so that the second magnetic conductive part 921, the second connecting part 923, and the second extension part 922 can be formed as an S-pole, and the structure of the S-pole magnetic conductive part 92 is simple and easy to process and manufacture.

[0106] In some embodiments of this application, as shown in Figures 1, 2, and 7, at least one of the first connecting portion 913 and the second connecting portion 923 is bent toward the radial direction of the rotor body 21. That is, the first connecting portion 913 can be bent toward the radial direction of the rotor body 21, or the second connecting portion 923 can be bent toward the radial direction of the rotor body 21, or both the first connecting portion 913 and the second connecting portion 923 can be bent toward the radial direction of the rotor body 21, so that an installation space can be formed between the first extension portion 912 and the second extension portion 922, which facilitates the movement of the magnetizing assembly 30 between the first extension portion 912 and the second extension portion 922, making the movement smoother, meeting the required placement requirements, and having a simple structure that is easy to process and manufacture.

[0107] In some embodiments, as shown in Figures 1, 2 and 7, one of the first connecting portion 913 and the second connecting portion 923 is bent radially inward toward the rotor body 21, and the other is bent radially outward toward the rotor body 21, so that an installation space is formed between the first extension portion 912 and the second extension portion 922, which facilitates the magnetic adjustment assembly 30 to be located between the first extension portion 912 and the second extension portion 922, meets the required placement requirements, and has a simple structure that is easy to process and manufacture.

[0108] In some embodiments, as shown in Figures 3 and 7, there can be multiple N-pole magnetic conductive parts 91 (more than or equal to two). The multiple N-pole magnetic conductive parts 91 are arranged at intervals along the circumferential direction of the rotor body 21, that is, there are multiple first magnetic conductive parts 911, first extension parts 912 and first extension parts 912. The reliability of the magnetic adjustment of the motor 100 can be ensured by the multiple N-pole magnetic conductive parts 91.

[0109] Furthermore, as shown in Figures 1, 2, and 7, the first extension 912 of the plurality of N-pole magnetic conductive parts 91 is formed as an annulus extending in the circumferential direction of the rotor body 21. Thus, when the magnetic adjustment assembly 30 is fixed in the axial position along the rotor body 21, the rotation of the rotor body 21 drives the N-pole magnetic conductive parts 91 to rotate. Since the first extension 912 is formed as an annulus, the magnetic field acting on the magnetic adjustment assembly 30 by the first extension 912 is fixed, which can reduce eddy current losses, ensure more accurate and stable magnetic adjustment, and help improve the service life of the motor 100.

[0110] In some embodiments, as shown in FIG3 and FIG7, there can be multiple (two or more) S-pole magnetic conductive parts 92. The multiple S-pole magnetic conductive parts 92 are arranged at intervals along the circumferential direction of the rotor body 21, that is, there are multiple second magnetic conductive parts 921, second connecting parts 923 and second extension parts 922. The reliability of magnetic adjustment of motor 100 can be ensured by multiple S-pole magnetic conductive parts 92.

[0111] Furthermore, as shown in Figures 1, 2, and 7, the second extension 922 of the plurality of S-pole magnetic conductive parts 92 is formed as an annulus extending in the circumferential direction of the rotor body 21. Thus, when the magnetic adjustment assembly 30 is fixed in the axial position along the rotor body 21, the rotation of the rotor body 21 drives the S-pole magnetic conductive parts 92 to rotate. Since the second extension 922 is formed as an annulus, the magnetic field acting on the magnetic adjustment assembly 30 by the second extension 922 is fixed, which can reduce eddy current losses, ensure more accurate and stable magnetic adjustment, and help improve the service life of the motor 100.

[0112] In some embodiments, the first magnetic conductive part 911 and the second magnetic conductive part 921 are arranged alternately along the circumferential direction of the rotor body 21, that is, a second magnetic conductive part 921 is provided between two adjacent first magnetic conductive parts 911 and a first magnetic conductive part 911 is provided between two adjacent second magnetic conductive parts 921. This can meet the required configuration requirements, has a compact structure, and ensures reliable magnetic adjustment of the motor 100.

[0113] In the embodiments of this application, the number of the first magnetic conductive part 911 and the second magnetic conductive part 921 can be set according to actual conditions. For example, when the motor 100 is a 2-pole motor, there are two of each of the first magnetic conductive part 911 and the second magnetic conductive part 921; when the motor 100 is a 4-pole motor, as shown in FIG. 5, there are four of each of the first magnetic conductive part 911 and the second magnetic conductive part 921; when the motor 100 is a 6-pole motor, there are six of each of the first magnetic conductive part 911 and the second magnetic conductive part 921; when the motor 100 is an 8-pole motor, there are eight of each of the first magnetic conductive part 911 and the second magnetic conductive part 921; when the motor 100 is a 10-pole motor, there are ten of each of the first magnetic conductive part 911 and the second magnetic conductive part 921, etc., which can be set according to usage requirements.

[0114] According to some embodiments of this application, as shown in Figures 1 and 2, the magnetic adjustment assembly 30 includes a magnetic conductor 31 and an actuating component 32. The actuating component 32 can be connected to the magnetic conductor 31, allowing the actuating component 32 to adjust the radially aligned area of ​​the magnetic conductor 31 and the magnetic conductor 22, making adjustment more convenient. Furthermore, the magnetic adjustment assembly 30 has a simple structure and is easy to manufacture. Simultaneously, the addition of the magnetic conductor 31 to the motor 100 increases the inductance of the motor 100, facilitating the reuse of the motor 100's inductance and enabling functions such as self-heating or charging of the battery connected to the motor 100. This reduces current harmonics, thereby reducing the risks of overheating and demagnetization of the permanent magnet 23.

[0115] It should be noted that the magnetically conductive part 22 is made of a magnetically conductive material, which gives the magnetically conductive part 22 good magnetic permeability in both the axial and radial directions along the rotor body 21. The magnetically conductive component 31 is also made of a magnetically conductive material, which gives the magnetically conductive component 31 a high magnetic permeability direction along the axial direction of the rotor body 21. By driving the magnetically conductive component 31 to move along the axial direction of the rotor body 21 through the actuating component 32, a magnetic flux short-circuit loop can be formed to meet the adjustment requirements of the magnetic flux of the main magnetic field.

[0116] 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, so that the actuating component 32 can adjust the magnetic conductor 31 to move along the axial direction of the rotor body 21, thereby adjusting the radial facing area of ​​the magnetic conductor 31 and the magnetic conductor 22, making the adjustment more convenient.

[0117] 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 simultaneously adjusting the radially facing area of ​​the magnetic conductor 31 and the magnetic flux through the rotor 20, which can meet different adjustment requirements.

[0118] 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 simultaneously adjusting the radial facing area of ​​the magnetic conductor 31 and the magnetic flux through the rotor 20, which can meet different adjustment requirements.

[0119] 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.

[0120] In some embodiments, the magnetic conductor 31 extends in a ring shape along the circumferential direction of the rotor body 21. When the rotor body 21 rotates, the magnetic conductor 31 moves along the axial direction of the rotor body 21. The ring-shaped magnetic conductor 31 can ensure the formation of a magnetic flux short-circuit loop, ensuring the magnetic flux adjustment effect of the magnetic adjustment component 30 on the magnetic flux short-circuit loop, and ensuring adjustment reliability.

[0121] In some specific embodiments, the magnetic conductor 31 may have a first state and a second state during its movement along the axial direction of the rotor body 21. In the first state, the magnetic conductor 31 is located in a first position, and in the second state, the magnetic conductor 31 is located in a second position. When the magnetic conductor 31 is located in the first position, the radially facing area between the magnetic conductor 31 and the magnetic conductor 22 is maximized, resulting in the maximum magnetic flux of the formed magnetic flux short-circuit loop, which can reduce the magnetic flux of the main magnetic field and meet the required usage requirements. When the magnetic conductor 31 is located in the second position, the radially facing area between the magnetic conductor 31 and the magnetic conductor 22 is minimized, or the magnetic conductor 31 and the magnetic conductor 22 are spaced apart in the axial direction of the rotor body 21, resulting in the minimum magnetic flux of the formed magnetic flux short-circuit loop. For example, the magnetic flux of the magnetic flux short-circuit loop can be 0, which can increase the magnetic flux of the main magnetic field and meet the required usage requirements. Therefore, 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 in the magnetic flux short-circuit loop can be adjusted, thereby realizing the adjustment of the magnetic flux of the main magnetic field.

[0122] For example, when the motor 100 is in the low-speed region, the magnetic conductor 31 is driven by the actuating component 32 to move in an axial direction away from the rotor body 21 (for example, upward as shown in FIG2). This reduces the radially facing area between the magnetic conductor 31 and the magnetic conductor 22, thereby reducing the magnetic flux of the magnetic flux short-circuit loop, increasing the magnetic flux of the main magnetic field, increasing the no-load back EMF, and thus increasing the torque performance and power performance in the low-speed region.

[0123] When the motor 100 is in the high-speed region, the actuating component 32 drives the magnetic conductor 31 to move along the axial direction close to the rotor body 21 (e.g., downwards as shown in Figure 2). This increases the radial facing area between the magnetic conductor 31 and the magnetic conductor 22, thereby increasing the magnetic flux in the short-circuit loop and reducing the magnetic flux in the main magnetic field. This reduces the no-load back EMF, lowers the losses of the rotor body 21 and stator 50, widens the constant power region, increases the peak torque or power in the high-speed region, and avoids problems such as overvoltage damage to other power devices caused by inverters connected to the motor 100. It also protects the circuit of the motor 100, for example, by protecting the electric drive system 200. The magnetic flux adjustment component 30 can adjust the magnetic flux in the short-circuit loop in real time, effectively adjusting the magnetic flux in the main magnetic field. This allows for real-time control of the no-load back EMF and voltage of the motor 100, meeting the usage requirements of the motor 100.

[0124] 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 field is adjusted by the magnetic adjustment component 30. This reduces the need to adjust the magnetic flux of the main magnetic field by the armature direct axis 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.

[0125] In some embodiments where at least one of the first connecting portion 913 and the second connecting portion 923 is bent toward the radial direction of the rotor body 21, as shown in FIG2, magnetic adjustment air gaps are formed between the two sides of the magnetic conductor 31 in the thickness direction and the first extension portion 912 and the second extension portion 922, respectively. This can avoid motion interference between the magnetic conductor 31 and the first extension portion 912 and the second extension portion 922, improve reliability, and ensure reliable magnetic adjustment.

[0126] For example, the first connecting part 913 is bent radially inward toward the rotor body 21, and the second connecting part 923 is bent radially outward toward the rotor body 21, so that an inner magnetic adjustment air gap is formed between the side of the magnetic conductor 31 opposite to the first extension 912 in the thickness direction and the first extension 912, and an outer magnetic adjustment air gap is formed between the side of the magnetic conductor 31 opposite to the second extension 922 in the thickness direction and the second extension 922. This can avoid motion interference between the magnetic conductor 31 and the first extension 912 and the second extension 922, improve reliability, and ensure reliable magnetic adjustment.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] According to some embodiments of this application, the first housing 12 is provided with a liquid outlet, which is located on the side of the magnetic adjustment slip ring 322 away from the rotor body 21. The liquid outlet communicates with the moving cavity 321, allowing the medium to enter the moving cavity 321 through the liquid outlet, thus meeting the liquid supply requirements of the moving cavity 321. This results in a simple structure and facilitates manufacturing. Furthermore, the liquid outlet's location on the first housing 12 facilitates its manufacturing, ensuring a compact structure and convenient assembly of the magnetic adjustment slip ring 322.

[0132] Furthermore, by adjusting the pressure of the medium, 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.

[0133] In some embodiments, the fluid outlet is connected to the moving cavity 321 and the hydraulic actuator, which enables the connection between the moving cavity 321 and the hydraulic actuator, allowing the hydraulic actuator medium to enter the moving cavity 321 through the fluid outlet, thus meeting the fluid supply requirements of the moving cavity 321.

[0134] 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.

[0135] In some embodiments, when the motor 100 is applied to the vehicle 300, 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 300, thereby reducing the power consumption of the vehicle 300 and improving its economy. For example, the vehicle 300 is a new energy vehicle.

[0136] In addition, the hydraulic actuator can be the internal structure of the electric drive system 200 of the vehicle 300. It can directly drive the cooling oil in the electric drive system 200 into the moving cavity 321 to meet the fluid supply needs of the moving cavity 321, thereby achieving 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] According to some embodiments of this application, as shown in Figures 1 and 2, the magnetic adjustment slip ring 322 has a groove 324 on the side facing the rotor 20 (e.g., the lower side shown in Figure 2). The magnetic guide 31 is disposed in the groove 324, which can realize the connection between the magnetic guide 31 and the magnetic adjustment slip ring 322, ensuring that the magnetic guide 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.

[0145] 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.

[0146] In some embodiments of this application, the magnetic adjustment 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, accurately controlling the radially aligned area between the magnetic conductor 31 and the magnetic conductor 22, improving the magnetic adjustment accuracy of the magnetic adjustment assembly 30, and further improving the reliability of the motor 100.

[0147] According to some embodiments of this application, the magnetic conductor 31 is formed by winding magnetic sheets around the axis of the rotor body 21. Therefore, the gaps between the magnetic sheets 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 while reducing costs.

[0148] In some embodiments of this application, referring to Figures 1, 2, and 8-10, the rotor body 21 may include a rotor core 211. The rotor core 211 is provided with a first magnetic groove 41, on which a magnetic guide part 22 can be installed, ensuring that the magnetic guide part 22 is reliably fixed on the rotor core 211, and that the magnetic guide part 22 can meet the usage requirements of the motor 100.

[0149] Furthermore, as shown in Figures 1, 2, and 8-10, the rotor body 21 also includes a rotor partition 212. The rotor partition 212 has a partition flow path, which is connected to the first magnetic guide groove 41, forming a cooling channel 216. Thus, a medium (e.g., cooling oil or water) flows within the cooling channel 216, allowing the medium to cool the rotor core 211 and the magnetic guide portion 22 within the first magnetic guide groove 41. This meets the cooling requirements of the motor 100, ensuring good cooling performance, improving the heat dissipation efficiency of the motor 100, ensuring normal operation of the motor 100, and extending its service life. Simultaneously, cooling of the rotor core 211 is achieved through the partition flow path of the rotor partition 212, reusing the first magnetic guide groove 41 without the need for additional flow paths on the rotor core 211. This reduces the structural complexity caused by flow paths on the rotor core 211 in related technologies, facilitating manufacturing and reducing production costs.

[0150] The rotor core 211 and the rotor partition 212 constitute the motor cooling assembly.

[0151] It should be noted that, for ease of description, the terms "up" and "down" in this application are based on the orientation relationships shown in the accompanying drawings, and are not intended to limit the orientation in actual application.

[0152] In some embodiments, the magnetic conductive part 22 is fixed in the first magnetic conductive groove 41 by adhesive bonding, which ensures that the magnetic conductive part 22 is reliably fixed on the rotor core 211, prevents the magnetic conductive part 22 from falling off the rotor core 211, and ensures the working reliability of the motor 100.

[0153] In some embodiments, the rotor partition 212 can be a magnetic shielding plate, which can prevent the leakage of the magnetic field generated on the rotor core 211 and ensure the normal operation of the motor.

[0154] According to the embodiments of this application, the motor 100 has a first magnetic groove 41 in the rotor core 211 suitable for mounting a magnetic guide part 22. The partition flow path of the rotor partition 212 is connected to the first magnetic groove 41 to form a cooling flow channel 216, so that the medium can cool the rotor core 211 and the magnetic guide part 22 in the first magnetic groove 41, meet the cooling requirements of the motor 100, ensure good cooling effect of the motor 100, improve the heat dissipation efficiency of the motor 100, ensure normal use of the motor 100, and help extend the service life of the motor 100. Moreover, the rotor core 211 has a simple structure and is easy to process and manufacture.

[0155] According to some embodiments of this application, as shown in Figures 8 and 9, the first magnetic groove 41 extends along the axial direction of the rotor core 211 (the up-down direction shown in Figure 9) to ensure that the magnetic part 22 is reliably fixed in the first magnetic groove 41, and the rotor partition 212 is disposed at the axial end of the rotor core 211 so that the partition flow path can cool the axial end of the rotor core 211, ensuring reliable cooling of the rotor core 211.

[0156] In some embodiments of this application, as shown in Figures 8, 10 and 16, the cooling channel 216 includes a first channel 71 and a second channel 72. The first channel 71 extends along the axial direction of the rotor core 211, and the second channel 72 extends along the radial direction of the rotor core 211. The radial outer end of the second channel 72 is connected to one end of the first channel 71 in the axial direction (e.g., the up-down direction shown in Figure 10), thereby realizing the connection between the second channel 72 and the first channel 71.

[0157] Therefore, the medium can flow between the first flow channel 71 and the second flow channel 72, realizing the flow of the medium in the rotor core 211, which makes the cooling area of ​​the rotor core 211 larger, effectively cooling the rotor core 211 and ensuring good cooling effect.

[0158] In some embodiments, as shown in Figures 8, 10 and 16, the cooling channel 216 further includes a third channel 73, which extends along the radial direction of the rotor core 211. The inner radial end of the third channel 73 is connected to the other end of the first channel 71 in the axial direction, thereby achieving communication between the third channel 73 and the first channel 71. The outer radial end of the third channel 73 extends to the outer peripheral wall of the rotor core 211.

[0159] Thus, the medium can flow from the second flow channel 72 through the first flow channel 71 along the axial direction of the rotor core 211 to the third flow channel 73, realizing the flow of the medium within the rotor core 211. This results in a larger cooling area for the rotor core 211, effectively cooling the rotor core 211 and ensuring good cooling performance. Furthermore, after the medium flows out from the third flow channel, it can cool other structures of the motor 100 (such as the stator 50), which helps improve the heat dissipation efficiency of the motor 100.

[0160] According to some embodiments of this application, as shown in Figures 8-10 and 14-16, the rotor core 211 includes a first partition and a second partition. The first partition and the second partition are disposed at both ends of the rotor core 211 in the axial direction (e.g., the up-down direction shown in Figure 10). The first partition and the second partition can prevent the leakage of the magnetic field generated on the rotor core 211, and ensure the reliable operation of the motor 100.

[0161] Furthermore, as shown in Figures 10 and 16, the second flow channel 72 is located between the first partition and the rotor core 211, and the third flow channel 73 is located between the second partition and the rotor core 211. The second flow channel 72 and the third flow channel 73 can achieve cooling of both ends of the rotor core 211 in the axial direction, ensuring reliable cooling of the rotor core 211, and facilitating the processing and manufacturing of the second flow channel 72 and the third flow channel 73.

[0162] Of course, the second flow channel 72 can also be located between the second partition and the rotor core 211, and the third flow channel 73 can be located between the first partition and the rotor core 211, which is also within the scope of protection of this application.

[0163] In some embodiments, as shown in Figures 10 and 16, a first flow channel 71 is provided on the rotor core 211. The first flow channel 71 can achieve cooling of the rotor core 211 in the axial direction, ensuring reliable cooling of the rotor core 211.

[0164] In some embodiments of this application, as shown in FIG8, there can be multiple (two or more) cooling channels 216. These multiple cooling channels 216 are spaced apart along the circumferential direction of the rotor core 211. The multiple cooling channels 216 increase the flow path of the medium within the rotor core 211, resulting in better cooling of the rotor core 211 and improving the cooling efficiency of the motor 100. Furthermore, at least two of the multiple cooling channels 216 have second channels 72 located at opposite ends of the rotor core 211 in the axial direction, which effectively increases cooling at both ends of the rotor core 211 in the axial direction, further improving the cooling efficiency of the motor 100.

[0165] According to some embodiments of this application, the second channel 72 of any two adjacent cooling channels 216 along the circumferential direction of the rotor core 211 is located at opposite ends of the rotor core 211 in the axial direction. Thus, at one end of the rotor core 211 in the axial direction, the first channel 71 and the second channel 72 can be arranged alternately to ensure good cooling effect at both ends of the rotor core 211 in the axial direction, satisfy the cooling of the rotor core 211 in the axial direction, and facilitate processing and manufacturing.

[0166] In some embodiments of this application, as shown in Figures 14 and 15, the first partition and the second partition have the same structure and / or dimensions. That is, the first partition and the second partition can have the same structure or the same dimensions, which facilitates the processing and manufacturing of the first partition and the second partition and helps to reduce the design cost of the first partition and the second partition. Alternatively, the first partition and the second partition can have the same structure and dimensions, which facilitates the processing and manufacturing of the first partition and the second partition, enables the versatility of the first partition and the second partition, and helps to reduce the cost of processing the first partition and the second partition separately.

[0167] In some embodiments, as shown in Figures 10, 14, and 15, at least one of the first partition and the second partition is provided with a first flow guide groove 81 on the side facing the rotor core 211. That is, the first partition is provided with a first flow guide groove 81 on the side facing the rotor core 211, or the second partition is provided with a first flow guide groove 81 on the side facing the rotor core 211, or both the first partition and the second partition are provided with a first flow guide groove 81 on the side facing the rotor core 211. The first flow guide groove 81 defines a second flow channel 72 between itself and the axial end face of the rotor core 211, which makes the second flow channel 72 easy to manufacture and facilitates the processing and manufacturing of the first partition and / or the second partition.

[0168] In some embodiments, as shown in Figures 10, 13, and 14, at least one of the first and second partitions has a second flow guide groove 82 on the side facing away from the rotor core 211. That is, the first partition has a second flow guide groove 82 on the side facing away from the rotor core 211, or the second partition has a second flow guide groove 82 on the side facing away from the rotor core 211, or both the first and second partitions have a second flow guide groove 82 on the side facing away from the rotor core 211. The second flow guide groove 82 is configured as a third flow channel 73, which makes the third flow channel 73 easy to manufacture and facilitates the processing and manufacturing of the first and / or second partitions.

[0169] In some embodiments, as shown in Figures 10, 13 and 14, at least one of the first partition and the second partition is provided with a first flow guide groove 81 on the side facing the rotor core 211. The first flow guide groove 81 defines a second flow channel 72 between itself and the axial end face of the rotor core 211. At least one of the first partition and the second partition is provided with a second flow guide groove 82 on the side facing away from the rotor core 211. The second flow guide groove 82 is configured as a third flow channel 73, which makes the second flow channel 72 and the third flow channel 73 easy to manufacture and facilitates the processing and manufacturing of the first partition and / or the second partition.

[0170] In some embodiments, as shown in FIG13, there are multiple first guide grooves 81. The multiple first guide grooves 81 are spaced apart in the circumferential direction of the first partition or the second partition. Multiple first guide grooves 81 can realize the setting of multiple cooling channels 216 on the rotor core 211, so as to ensure reliable cooling of the rotor core 211.

[0171] In the embodiments of this application, the number of the first guide grooves 81 can be flexibly set according to the actual situation. For example, the first guide grooves 81 can be four as shown in FIG14, or two, three, five, six or more, all of which are within the protection scope of this application.

[0172] In some embodiments, as shown in FIG14, there are multiple second guide grooves 82. The multiple second guide grooves 82 are spaced apart in the circumferential direction of the first partition or the second partition. Multiple cooling channels 216 can be set on the rotor core 211 through the multiple second guide grooves 82, so as to ensure reliable cooling of the rotor core 211.

[0173] In the embodiments of this application, the number of the second guide channels 82 can be flexibly set according to the actual situation. For example, the second guide channels 82 can be four as shown in FIG15, or two, three, five, six or more, all of which are within the protection scope of this application.

[0174] In some embodiments of this application, as shown in Figures 10-12 and 16, the first flow channel 71 is located radially inside the first magnetic groove 41 and is connected to the first magnetic groove 41, so that the first flow channel 71 can flow through the magnetic part 22, thereby achieving cooling of the rotor core 211 and the magnetic part 22, ensuring good cooling effect of the motor 100 and improving the heat dissipation efficiency of the motor 100.

[0175] According to some embodiments of this application, as shown in Figures 10 and 13, a third guide groove 83 is provided on the side of the first partition plate and / or the second partition plate facing the rotor core 211, where the second guide groove 82 is provided. The third guide groove 83 is located radially inner to the first magnetic guide groove 41 and is connected to the first flow channel 71 and the first magnetic guide groove 41. The second guide groove 82 is located radially outer to the first magnetic guide groove 41 and is connected to the first magnetic guide groove 41. Thus, the third guide groove 83 enables the connection between the first flow channel 71 and the third flow channel 73, avoiding blockage of the first flow channel 71, ensuring reliable medium flow, and thus ensuring good cooling effect of the motor 100.

[0176] In some embodiments, as shown in Figures 13 and 14, there are multiple third flow channels 83. The multiple third flow channels 83 are spaced apart in the circumferential direction of the first partition or the second partition. The multiple third flow channels 83 are respectively connected to multiple first flow channels 71 and first magnetic grooves 41. The multiple third flow channels 83 can ensure that the first flow channels 71 and the third flow channels 73 are connected, and ensure reliable medium flow.

[0177] In the embodiments of this application, the number of third guide channels 83 can be flexibly set according to the actual situation. For example, the third guide channels 83 can be four as shown in FIG13, or two, three, five, six or more, all of which are within the protection scope of this application.

[0178] In some embodiments of this application, the magnetic conductive part 22 is provided with a clearance hole 217, which can connect the second guide groove 82 and the third guide groove 83, so that the medium can enter the second guide groove 82 from the third guide groove 83, avoid the magnetic conductive part 22 from blocking the flow of the medium, ensure reliable flow of the medium, and thus ensure the cooling effect on the motor 100.

[0179] In some embodiments of this application, as shown in Figures 8 and 10, the motor 100 further includes a rotating shaft 60, and a rotor core 211 is sleeved on the rotating shaft 60. When the motor 100 is running, the rotor core 211 can drive the rotating shaft 60 to rotate, thereby realizing the power output of the motor 100.

[0180] Furthermore, as shown in Figures 8 and 10, the rotating shaft 60 has a liquid supply channel 61, and a liquid supply port 62 is provided on the outer peripheral wall of the rotating shaft 60. The liquid supply port 62 is connected to the liquid supply channel 61, and one end of the cooling channel 216 is connected to the liquid supply port 62. The medium in the liquid supply channel 61 can enter the cooling channel 216 through the liquid supply port 62, so that the medium can cool the rotor core 211 and the magnetic conductive part 22, ensuring good cooling effect of the motor 100, improving the heat dissipation efficiency of the motor 100, ensuring normal operation of the motor 100, and helping to extend the service life of the motor 100.

[0181] In some embodiments, as shown in Figures 8 and 10-13, the rotor core 211 and the rotor partition 212 constitute the rotor body 21, and the rotor body 21 and the magnetic conductive part 22 constitute the rotor 20. The rotor body 21 is provided with a shaft hole 215, that is, both the rotor core 211 and the rotor partition 212 are provided with a shaft hole 215, so that the rotating shaft 60 can pass through the shaft hole 215, which facilitates the connection between the rotating shaft 60 and the rotor 20 and meets the required connection requirements.

[0182] In some embodiments, as shown in Figures 8 and 10, there are two sets of liquid supply ports 62. The two sets of liquid supply ports 62 are spaced apart along the axial direction of the rotating shaft 60 (the up and down direction as shown in Figure 9). The second flow channels 72 located at both ends of the rotor core 211 in the axial direction are respectively connected to the two sets of liquid supply ports 62. Liquid can be supplied to the second flow channels 72 located at both ends of the rotor core 211 in the axial direction through the two sets of liquid supply ports 62, which can meet the liquid supply requirements of the second flow channels 72, ensure reliable cooling, and have a simple structure that is easy to process and manufacture.

[0183] According to some embodiments of this application, there are multiple (two or more) second flow channels 72 located at the same end of the rotor core 211 in the axial direction, and one corresponding liquid supply port 62. The liquid supply port 62 of the corresponding group is connected to multiple second flow channels 72, which can realize the liquid supply needs of multiple second flow channels 72 through one liquid supply port 62 and meet different setting requirements.

[0184] For example, in some embodiments, a flow path is provided between the rotor core 211 and the shaft 60, and the corresponding set of liquid supply ports 62 and multiple second flow channels 72 are all connected to the flow path, thereby realizing the connection requirement between one liquid supply port 62 and multiple second flow channels 72 and meeting the liquid supply requirements of multiple second flow channels 72.

[0185] Alternatively, as shown in Figure 10, there are multiple (two or more) second flow channels 72 located at the same end of the rotor core 211 in the axial direction, and multiple corresponding liquid supply ports 62. The multiple corresponding liquid supply ports 62 are connected to the multiple second flow channels 72 respectively, which can realize the liquid supply needs of multiple second flow channels 72 through multiple liquid supply ports 62, meet different setting requirements, and ensure good medium flow effect.

[0186] In some embodiments of this application, as shown in FIG16, the first partition and the second partition are offset by an angle of one rotor pole in the circumferential direction, so that the first partition and the second partition can be staggered to form multiple cooling channels 216, ensuring that the rotor core 211 can be reliably cooled.

[0187] According to some embodiments of this application, the two sets of liquid supply ports 62 are offset by an angle of one rotor pole along the circumferential direction of the rotating shaft 60, so that the two sets of liquid supply ports 62 can supply liquid to the cooling channels 216 of the first partition and the second partition respectively, so as to meet the required liquid supply needs.

[0188] In some embodiments where the structure and dimensions of the first and second partitions are the same, as shown in Figures 8, 10, 14 and 15, there are multiple first magnetic guide grooves 41, which are spaced apart in the circumferential direction of the first and second partitions. On one side of the thickness direction (e.g., the up-down direction shown in Figure 10), there are multiple first guide grooves 81 and multiple third guide grooves 83. The multiple first guide grooves 81 and multiple third guide grooves 83 are staggered and communicate with the multiple first magnetic guide grooves 41 respectively. On the other side of the thickness direction of the first and second partitions, there are multiple second guide grooves 82. The multiple second guide grooves 82 and multiple third guide grooves 83 are arranged in the radial direction of the first and second partitions. The liquid supply ports 62 are two sets spaced apart along the axial direction of the rotating shaft 60.

[0189] During assembly, the first partition, rotor core 211 and the second partition are all sleeved on the rotating shaft 60, and the first partition and the second partition are respectively located at both ends of the rotor core 211 in the axial direction. The first partition and the second partition are offset by an angle of the first magnetic guide groove 41, that is, the first guide groove 81 of the first partition and the third guide groove 83 of the second partition are opposite to each other in the axial direction of the rotor core 211, and the first guide groove 81 of the first partition and the first guide groove 81 of the second partition are respectively connected to two sets of liquid supply ports 62. The first guide groove 81 and the axial end face of the rotor core 211 define a second flow channel 72, and the second guide groove 82 is constructed as the third flow channel 73.

[0190] When the motor 100 is running, the medium in the liquid supply channel 61 can enter the space between the first guide groove 81 of the first partition and the rotor core 211, and the space between the first guide groove 81 and the rotor core 211 of the second partition, respectively, through the two sets of liquid supply ports 62. This allows the medium between the first guide groove 81 and the rotor core 211 of the first partition to enter the first flow channel 71 connected to the first guide groove 81, and then flow from the third guide groove 83 of the second partition opposite to the first guide groove 81 into the second guide groove 82 of the second partition. Simultaneously, the medium between the first guide groove 81 of the second partition and the rotor core 211 enters the first flow channel 71 connected to the first guide groove 81, and flows from the third guide groove 83 of the first partition opposite to the first guide groove 81 into the second guide groove 82 of the first partition. This realizes the flow of the medium within the rotor core 211, effectively cooling the rotor core 211 and the magnetic conductive part 22, ensuring good cooling effect for the rotor core 211 and the magnetic conductive part 22, and improving the heat dissipation efficiency of the motor 100. For example, the flow path of the medium is shown by the arrow in Figure 8.

[0191] In some embodiments of this application, as shown in FIG8, the cross-sectional area of ​​the liquid supply channel 61 perpendicular to the axial direction of the rotating shaft 60 remains unchanged, which facilitates the flow of the medium in the liquid supply channel 61, meets the flow requirements of the medium, and makes the medium flow more smoothly.

[0192] Alternatively, along the axial direction of the rotating shaft 60, the cross-sectional area of ​​the liquid supply channel 61, perpendicular to the axial direction of the rotating shaft 60, gradually decreases, enabling the medium to flow within the liquid supply channel 61, satisfying the flow requirements of the medium, and meeting different configuration requirements for the liquid supply channel 61, thereby satisfying different usage requirements.

[0193] In some embodiments of this application, as shown in Figures 1-5, the rotor core 211 has multiple (two or more) magnetic slots 42. The multiple magnetic slots 42 penetrate the rotor core 211 along the axial direction of the rotor core 211. The magnetic guide part 22 is disposed in the first magnetic guide slot 41, and the permanent magnet 23 of the rotor 20 is disposed in the magnetic slot 42. This enables the placement of multiple magnetic guide parts 22 and multiple permanent magnets 23, ensuring that the magnetic guide parts 22 and permanent magnets 23 are reliably placed on the rotor core 211.

[0194] 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.

[0195] In the embodiments of this application, the specific structure of the magnet groove 42 can be set according to the actual situation. For example, the magnet groove 42 can be formed as an arc-shaped hole or a square hole as shown in Figure 5, which can meet the placement requirements of different permanent magnets 23, thereby meeting different usage requirements.

[0196] For example, in some embodiments, as shown in Figures 3-5, the shape of the magnet slot 42 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.

[0197] In some embodiments, as shown in Figures 3-5, there can be multiple (two or more) magnetic slots 42, which are spaced apart along the circumferential direction of the rotor body 21. Permanent magnets 23 are arranged in multiple pairs corresponding to the magnetic slots 42, forming a group of magnetic slots 42. In a cross-section perpendicular to the axis of the rotor body 21, the shape of a group of multiple magnetic slots 42 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 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 slots 42 can be formed as "V+V", "-+V", "V+U", etc.

[0198] In some embodiments, as shown in Figures 3 and 4, the multiple magnet slots 42 can be formed into multiple groups (more than or equal to two groups). The multiple groups of magnet slots 42 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.

[0199] According to some embodiments of this application, as shown in FIG6, the rotor partition 212 has a second magnetic groove 214 extending through in the axial direction. The magnetic part 22 is disposed in the first magnetic groove 41 and the second magnetic groove 214, so that the magnetic part 22 can extend out of the rotor partition 212 through the first magnetic groove 41 and the second magnetic groove 214 respectively. This allows the rotor partition 212 to avoid the magnetic part 22 through the second magnetic groove 214, making it easier for the magnetic part 22 to extend out of the axial end of the rotor body 21, meeting the required connection requirements. The structure is simple and easy to process and manufacture.

[0200] In some embodiments, as shown in Figures 1 and 7, the rotor core 211 includes multiple (two or more) rotor laminations 213. These laminations are stacked along the axial direction of the rotor body 21, effectively reducing eddy current losses and increasing magnetic flux density, thereby improving the efficiency of the motor 100. Simultaneously, rotor partitions 212 are provided at both ends of the rotor core 211 along the axial direction, which can press the multiple rotor laminations 213 together, ensuring reliable connection. For example, the rotor core 211 is formed by stacking multiple rotor laminations 213.

[0201] 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.

[0202] In the embodiments of this application, the specific location of the magnetic conductive part 22 can be set according to the actual situation.

[0203] In some embodiments, as shown in Figures 3-5, the first magnetic guide groove 41 may be located radially inside the magnet groove 42; or, the first magnetic guide groove 41 and the magnet groove 42 may be spaced apart along the circumferential direction of the rotor body 21; or, the maximum distance between the first magnetic guide groove 41 and the axis of the rotor body 21 is less than the minimum distance between the magnet groove 42 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 41 and the magnet groove 42, 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.

[0204] It should be noted that the maximum distance between the first magnetic guide groove 41 and the axis of the rotor body 21 can be equal to or greater than the minimum distance between the magnetic steel groove 42 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] It should be noted that the auxiliary slots are known to those skilled in the art and will not be described in detail here.

[0210] 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.

[0211] 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. That is, multiple sub-magnetic conductive parts are arranged along the radial direction of the rotor 20, or multiple sub-magnetic conductive parts are arranged along the circumferential direction of the rotor 20, or multiple sub-magnetic conductive parts are arranged along both the radial and circumferential directions of the rotor 20, so that 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.

[0212] In some embodiments where the rotor core 211 has a plurality of first magnetic grooves 41 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 41 respectively, which facilitates the assembly of the rotor 20.

[0213] 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.

[0214] 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.

[0215] According to some embodiments of this application, magnetic adjustment components 30 are provided on both sides of the rotor 20 in the axial direction, which can form two magnetic flux short-circuit loops on the motor 100, which is beneficial to improve the magnetic adjustment capability, eliminate axial unbalanced magnetic pull, and improve the reliability of the motor 100.

[0216] 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.

[0217] 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.

[0218] 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.

[0219] In some embodiments, as shown in Figures 1, 2, and 8-10, 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 radially facing area of ​​the magnetic adjustment component 30 and the magnetic guide section 22, 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.

[0220] In some embodiments, as shown in FIG1, the motor 100 further includes a rotating shaft 60, a portion of which is rotatably disposed within the housing 10. The rotor 20 is sleeved on the rotating shaft 60. 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 60 to rotate, thereby realizing the power output of the motor 100.

[0221] In some embodiments where the liquid supply ports 62 are two sets spaced apart along the axial direction of the rotating shaft 60, as shown in FIG10, the medium in the liquid supply channel 61 can enter the opposite second flow channel 72 through the two sets of liquid supply ports 62 respectively, and flow out through the first channel and the third flow channel connected to the second flow channel 72. The outflowing medium can cool the stator winding 52, ensuring good cooling effect of the motor 100, improving the heat dissipation efficiency of the motor 100, ensuring normal use of the motor 100, and helping to extend the service life of the motor 100.

[0222] In some embodiments of the magnetic adjustment assembly 30, which includes a magnetic guide 31 and an actuating component 32, the magnetic flux of the main magnetic field can be adjusted by adjusting the distance between the magnetic guide 31 and the magnetic guide 22 along the axial direction of the rotor core 211 through the actuating component 32. This also allows for adjustment of the inductance of the stator winding 52. Furthermore, the addition of the magnetic guide 31 to the motor 100 increases the inductance of the motor 100, which is beneficial for reusing the inductance of the motor 100. This enables functions such as self-heating or charging of the battery connected to the motor 100, reduces current harmonics, and thus reduces the risks of overheating and demagnetization of the permanent magnet 23.

[0223] An electric drive system 200 according to an embodiment of this application includes a motor 100 according to an embodiment of this application.

[0224] Referring to Figures 17 and 18, since the motor 100 according to the embodiment of this application has the above-mentioned beneficial technical effects, the electric drive system 200 according to the embodiment of this application extends the magnetic guide part 22 along the axial direction of the rotor body 21 and extends beyond the axial end of the rotor body 21. The magnetic adjustment component 30 can form a magnetic flux short-circuit loop with the rotor 20, so that the magnetic flux of the magnetic flux short-circuit loop can be changed by changing the radial facing area of ​​the magnetic adjustment component 30 and the magnetic guide part 22, thereby realizing the adjustment of the magnetic flux of the main magnetic field. The magnetic adjustment is convenient and can meet the usage requirements of the motor 100. The motor 100 has the advantages of both constant torque region and constant power region, and while ensuring high torque density and power density, it effectively expands the constant power operation region and high efficiency region.

[0225] The vehicle 300 according to an embodiment of this application includes an electric drive system 200 according to an embodiment of this application.

[0226] Referring to FIG18, since the electric drive system 200 according to the embodiment of this application has the above-mentioned beneficial technical effects, the vehicle 300 according to the embodiment of this application extends the magnetic guide part 22 along the axial direction of the rotor body 21 and extends beyond the axial end of the rotor body 21. The magnetic adjustment component 30 can form a magnetic flux short circuit with the rotor 20, so that the magnetic flux of the magnetic flux short circuit can be changed by changing the radial facing area of ​​the magnetic adjustment component 30 and the magnetic guide part 22, thereby realizing the adjustment of the magnetic flux of the main magnetic field. The magnetic adjustment is convenient and can meet the usage requirements of the motor 100. The motor 100 has the advantages of both constant torque region and constant power region, and while ensuring high torque density and power density, it effectively expands the constant power operation region and high efficiency region.

[0227] Other configurations and operations of the motor 100, electric drive system 200, and vehicle 300 according to embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0228] 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.

[0229] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" 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.

[0230] 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. An electric motor, wherein, include: A rotor (20), the rotor (20) comprising a rotor body (21) and a magnetic guide (22), the magnetic guide (22) extending along the axial direction of the rotor body (21) and extending beyond the axial end of the rotor body (21); and A magnetic adjustment component (30) is used to change the radially facing area between the magnetic adjustment component (30) and the magnetic conductive part (22).

2. The motor according to claim 1, wherein, The magnetizing assembly (30) is movably disposed at at least one axial end of the rotor body (21).

3. The motor according to claim 1 or 2, wherein, The magnetic conductive part (22) includes an N-pole magnetic conductive part (71) and an S-pole magnetic conductive part (72), which are spaced apart along the circumferential direction of the rotor body (21).

4. The motor according to claim 3, wherein, The N-pole magnetic conductive part (71) includes a first magnetic conductive part (711) and a first extension part (712). The first magnetic conductive part (711) is disposed inside the rotor body (21), and the first extension part (712) is connected to the first magnetic conductive part (711) and extends out of the axial end of the rotor body (21). The S-pole magnetic conductive part (72) includes a second magnetic conductive part (721) and a second extension part (722). The second magnetic conductive part (721) is disposed inside the rotor body (21), and the second extension part (722) is connected to the second magnetic conductive part (721) and extends out of the axial end of the rotor body (21). The magnetic adjustment component (30) is movably disposed between the first extension (712) and the second extension (722) to change the radially facing area of ​​the magnetic adjustment component (30) and the N-pole magnetic part (71) and the S-pole magnetic part (72).

5. The motor according to claim 4, wherein, The N-pole magnetic conductive part (71) further includes a first connecting part (713), which is disposed between the first magnetic conductive part (711) and the first extension part (712) and connects the first magnetic conductive part (711) and the first extension part (712); The S-pole magnetic conductive part (72) further includes a second connecting part (723), which is disposed between the second magnetic conductive part (721) and the second extension part (722) and connects the second magnetic conductive part (721) and the second extension part (722).

6. The motor according to claim 5, wherein, At least one of the first connecting portion (713) and the second connecting portion (723) is bent toward the radial direction of the rotor body (21).

7. The motor according to claim 6, wherein, One of the first connecting portion (713) and the second connecting portion (723) is bent in a radially inward direction toward the rotor body (21), and the other is bent in a radially outward direction toward the rotor body (21).

8. The motor according to claim 5, wherein, The N-pole magnetic conductive part (71) is a plurality of such parts spaced apart along the circumferential direction of the rotor body (21), and the first extension (712) of the plurality of N-pole magnetic conductive parts (71) is formed as an annulus extending along the circumferential direction of the rotor body (21). And / or, the S-pole magnetic conductive parts (72) are a plurality of such parts spaced apart along the circumferential direction of the rotor body (21), and the second extension (722) of the plurality of S-pole magnetic conductive parts (72) is formed as an annulus extending along the circumferential direction of the rotor body (21).

9. The motor according to any one of claims 1-8, wherein, The magnetizing assembly (30) includes: Magnetic conductor (31); and An actuating component (32) is connected to the magnetic conductor (31) and is used to adjust the radially facing area of ​​the magnetic conductor (31) and the magnetic conductor (22).

10. The motor according to claim 9, wherein, The magnetic conductor (31) can move along the axial direction of the rotor (20).

11. The motor according to claim 10, wherein, The magnetic conductor (31) can move circumferentially along the rotor (20); And / or, the magnetic conductor (31) may be moved radially along the rotor (20).

12. The motor according to claim 9, wherein, The magnetizing assembly (30) also includes: A first housing (12) is open on one side facing the rotor (20), and the magnetic conductor (31) and the actuating component (32) are both located inside the first housing (12).

13. The motor according to claim 12, 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).

14. The motor according to claim 13, wherein, The first housing (12) is provided with a liquid outlet, which is located on the side of the magnetic adjustment slip ring (322) away from the rotor body (21), and the liquid outlet is connected to the moving cavity (321).

15. The motor according to claim 13, 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).

16. The motor according to claim 15, 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 (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). 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).

17. The motor according to claim 15, 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).

18. The motor according to claim 13, wherein, The magnetic adjustment slip ring (322) has a groove (324) on the side facing the rotor (20), and the magnetic conductor (31) is disposed in the groove (324).

19. The motor according to claim 13, 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).

20. The motor according to claim 9, 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).

21. The motor according to claim 9, wherein, The magnetic conductor (31) is formed by winding a magnetic sheet around the axis of the rotor (20).

22. The motor according to claim 9, 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.

23. The motor according to any one of claims 1-22, wherein, The rotor body (21) includes: A rotor core (211) is provided with a first magnetic groove (41), the first magnetic groove (41) being adapted to mount a magnetic part (22); and The rotor partition (212) has a partition flow path, which is connected to the first magnetic groove (41) to form a cooling channel (216).

24. The motor according to claim 23, wherein, The first magnetic groove (41) extends along the axial direction of the rotor core (211), and the rotor partition (212) is disposed at the axial end of the rotor core (211).

25. The motor according to claim 23, wherein, The cooling channel (216) includes: A first flow channel (71) extends along the axial direction of the rotor core (211); and The second flow channel (72) extends in the radial direction of the rotor core (211), and the radial outer end of the second flow channel (72) is connected to one end of the first flow channel (71) in the axial direction.

26. The motor according to claim 25, wherein, The cooling channel (216) further includes: The third flow channel (73) extends in the radial direction of the rotor core (211), the inner radial end of the third flow channel (73) is connected to the other end of the first flow channel (71) in the axial direction, and the outer radial end of the third flow channel (73) extends to the outer peripheral wall of the rotor core (211).

27. The motor according to claim 26, wherein, The rotor partition (212) includes a first partition and a second partition. The first partition and the second partition are located at both ends of the rotor core (211) in the axial direction. The second flow channel (72) is located between one of the first partition and the second partition and the rotor core (211). The third flow channel (73) is located between the other of the first partition and the second partition and the rotor core (211).

28. The motor according to claim 27, wherein, The cooling channels (216) are a plurality of channels spaced apart along the circumferential direction of the rotor core (211), and at least two of the cooling channels (216) have second channels (72) located at opposite ends of the rotor core (211) in the axial direction.

29. The motor according to claim 28, wherein, The second channel (72) of any two adjacent cooling channels (216) along the circumferential direction of the rotor core (211) is located at opposite ends of the rotor core (211) in the axial direction.

30. The motor according to any one of claims 27-29, wherein, The first partition and the second partition have the same structure and / or dimensions.

31. The motor according to any one of claims 27-30, wherein, At least one of the first partition and the second partition is provided with a first flow channel (81) on the side facing the rotor core (211), and the first flow channel (81) defines a second flow channel (72) between the first flow channel (81) and the axial end face of the rotor core (211); And / or, at least one of the first partition and the second partition has a second guide groove (82) on the side opposite to the rotor core (211), and the second guide groove (82) is configured as the third flow channel (73).

32. The motor according to claim 31, wherein, The first flow channel (71) is located radially inside the first magnetic groove (41) and is connected to the first magnetic groove (41).

33. The motor according to claim 32, wherein, The first partition plate with the second flow guide groove (82) and / or the second partition plate with the third flow guide groove (83) on the side facing the rotor core (211) are provided with the third flow guide groove (83). The third flow guide groove (83) is located radially inside the first magnetic guide groove (41) and communicates with the first flow channel (71) and the first magnetic guide groove (41). The second flow guide groove (82) is located radially outside the first magnetic guide groove (41) and communicates with the first magnetic guide groove (41).

34. The motor according to claim 33, wherein, The magnetic guide part (22) is provided with a clearance hole (217) for connecting the second guide groove (82) and the third guide groove (83).

35. The motor according to claim 27, wherein, Also includes: A rotating shaft (60) is provided, the rotor core (211) is sleeved on the rotating shaft (60), the rotating shaft (60) has a liquid supply channel (61) inside, and a liquid supply port (62) communicating with the liquid supply channel (61) is provided on the outer peripheral wall of the rotating shaft (60), and one end of the cooling channel (216) is connected to the liquid supply port (62).

36. The motor according to claim 35, wherein, The liquid supply ports (62) are two sets spaced apart along the axial direction of the rotating shaft (60), and the second flow channels (72) located at both ends of the rotor core (211) in the axial direction are respectively connected to the two sets of liquid supply ports (62).

37. The motor according to claim 36, wherein, There are multiple second flow channels (72) located at the same end of the rotor core (211) in the axial direction, and the corresponding liquid supply port (62) is one and connected to multiple second flow channels (72); Alternatively, there may be multiple second flow channels (72) located at the same end of the rotor core (211) in the axial direction, and multiple liquid supply ports (62) of the corresponding group, which are respectively connected to multiple second flow channels (72).

38. The motor according to claim 36, wherein, The first partition and the second partition are offset from each other by an angle of one rotor pole in the circumferential direction.

39. The motor according to claim 38, wherein, The two sets of liquid supply ports (62) are offset by an angle of one rotor pole along the circumferential direction of the rotating shaft (60).

40. The motor according to claim 35, wherein, Along the axial direction of the rotating shaft (60), the cross-sectional area of ​​the liquid supply channel (61) perpendicular to the axial direction of the rotating shaft (60) remains unchanged; Alternatively, along the axial direction of the rotating shaft (60), the cross-sectional area of ​​the liquid supply channel (61) perpendicular to the axial direction of the rotating shaft (60) gradually decreases.

41. The motor according to any one of claims 23-40, wherein, The rotor core (211) has multiple magnetic slots (42) extending along the axial direction. The magnetic guide part (22) is located in the first magnetic guide slot (41), and the permanent magnet (23) of the rotor (20) is located in the magnetic slot (42).

42. The motor according to claim 41, wherein, The rotor partition (212) has a second magnetic groove (214) that extends through the axial direction, and the magnetic part (22) is disposed in the first magnetic groove (41) and the second magnetic groove (214).

43. The motor according to any one of claims 23-42, wherein, The magnetic conductive part (22) and the rotor core (211) are an integral part.

44. The motor according to any one of claims 23-43, wherein, The rotor core (211) is a skewed rotor.

45. The motor according to any one of claims 23-44, wherein, The outer peripheral wall of the rotor core (211) is provided with an auxiliary groove extending along the axial direction of the rotor body (21).

46. ​​The motor according to any one of claims 23-45, 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).

47. The motor according to claim 46, 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).

48. The motor according to any one of claims 23-47, 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).

49. The motor according to any one of claims 23-48, wherein, The rotor partition (212) is a magnetic shield.

50. An electric drive system, wherein, Includes the motor (100) according to any one of claims 1-49.

51. A vehicle, wherein, Includes the electric drive system according to claim 50.

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