Flux regulation assembly, motor and vehicle

Abstract

A vehicle, the vehicle having a motor that comprises a flux regulation assembly. The flux regulation assembly is adapted to be arranged on at least one end of a rotor in the axial direction, the position of the flux regulation assembly in the axial direction of the rotor being adjustable so as to regulate magnetic flux passing through the rotor.

Description

Magnetizing components, motors and vehicles

[0001] This application claims priority to Chinese Patent Application No. 202410710007.6, filed on May 31, 2024, and Chinese Patent Application No. 202410709480.2, filed on May 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of motor technology, and in particular to a magnetizing component, a motor, and a vehicle. Background Technology

[0003] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. An electric motor includes a housing, a rotor, and a radial stator. The radial stator is mounted on the housing and is sleeved on the radial outside of the rotor. The rotor can rotate relative to the radial stator, thereby directly converting electrical energy into mechanical energy.

[0004] Application content

[0005] This application aims to at least partially address one of the aforementioned technical problems in the related art.

[0006] To this end, in one aspect, a magnetic adjustment component is provided, which, driven by a medium, enables the magnetic adjustment component to move closer to or further away from the rotor along the axial direction, thereby achieving effective adjustment of the working magnetic field.

[0007] According to some embodiments of this application, a magnetic flux adjustment assembly is adapted to be disposed at at least one end of the rotor in the axial direction, the position of the magnetic flux adjustment assembly in the axial direction of the rotor being adjustable to adjust the magnetic flux through the rotor.

[0008] According to some embodiments of this application, the magnetic flux adjustment assembly can be adjusted to move closer to or further away from the rotor along the axial direction by adjusting the position of the magnetic flux adjustment assembly in the rotor, thereby achieving effective adjustment of the magnetic flux of the rotor and thus effective adjustment of the working magnetic field of the motor.

[0009] According to some embodiments of this application, the magnetic adjustment assembly includes an axial stator and a magnetic adjustment slider, the magnetic adjustment slider being movable in the axial direction of the rotor, and the axial stator being connected to the magnetic adjustment slider.

[0010] According to some embodiments of this application, the axial stator includes an axial stator core and an axial stator winding, the axial stator core is connected to the magnetic adjustment slider, and the axial stator winding is wound around the axial stator core.

[0011] According to some embodiments of this application, the axial stator core is fixedly connected to one end of the magnetic adjustment slider near the rotor.

[0012] According to some embodiments of this application, the magnetizing assembly satisfies at least one of the following: the magnetizing assembly is movable circumferentially along the rotor; and the magnetizing assembly is movable radially along the rotor.

[0013] According to some embodiments of this application, the magnetic adjustment slider is movably disposed in the moving cavity, the moving cavity being connected to a first inlet and a second inlet, the magnetic adjustment slider separating the first inlet and the second inlet, the medium being introduced into the moving cavity through the first inlet to push the magnetic adjustment slider axially closer to the rotor, and the medium being introduced into the moving cavity through the second inlet to push the magnetic adjustment slider axially away from the rotor.

[0014] According to some embodiments of this application, the magnetic slider includes a mating part that fits against the cavity wall of the moving cavity, and the mating part is movable along the cavity wall of the moving cavity.

[0015] According to some embodiments of this application, the magnetic slider further includes a connecting portion, the first end of which is fixedly connected to the mating portion, and the second end of which is connected to the axial stator.

[0016] Secondly, an electric motor is provided. The electric motor includes: a rotor and the aforementioned magnetizing assembly or motor cooling assembly, wherein the magnetizing assembly is movably disposed at at least one axial end of the rotor.

[0017] According to some embodiments of this application, the motor further includes: a housing, the housing having a movable cavity inside, the movable cavity being located at at least one end of the rotor in the axial direction, the magnetic adjustment component being movably disposed in the movable cavity at the corresponding end of the rotor, the amount of medium in the movable cavity being adjustable to change the distance between the magnetic adjustment component and the rotor in the axial direction of the rotor.

[0018] According to the embodiments of the present application, by adjusting the axial distance between the magnetic adjustment component and the rotor, the magnetic adjustment component can be moved closer to or further away from the rotor along the axial direction, thereby achieving effective adjustment of the magnetic flux of the rotor, and thus achieving effective adjustment of the working magnetic field of the motor.

[0019] According to some embodiments of this application, the outer casing is provided with a first inlet and a second inlet, both of which are in communication with the moving cavity; the magnetizing assembly separates the first inlet and the second inlet, and the medium introduced into the moving cavity through the first inlet is suitable for pushing the magnetizing assembly closer to the rotor along the axial direction, while the medium introduced into the moving cavity through the second inlet is suitable for pushing the magnetizing assembly away from the rotor along the axial direction.

[0020] According to some embodiments of this application, the housing further has a mounting cavity, in which the rotor is rotatably mounted.

[0021] According to some embodiments of this application, the rotor includes a plurality of rotor laminations and at least one rotor magnetic block, the plurality of rotor laminations being stacked axially, and the rotor magnetic block being disposed through the plurality of rotor laminations axially along the rotor.

[0022] According to some embodiments of this application, in a plane projection perpendicular to the axial direction of the rotor, the rotor magnetic block at least partially overlaps with the magnetic adjustment assembly.

[0023] According to some embodiments of this application, the motor further includes: a rotating shaft and a rotor magnetic shielding plate, the rotating shaft being rotatably mounted on the housing, and the rotor being mounted on the rotating shaft; the rotor magnetic shielding plate is disposed at both ends in the axial direction of the rotor, and the rotor magnetic shielding plate is connected to the rotating shaft, and the rotor magnetic guide block passes through the rotor magnetic shielding plate along the axial direction of the rotor.

[0024] According to some embodiments of this application, the motor further includes an axial displacement sensor configured to detect the axial distance between the magnetizing assembly and the rotor.

[0025] According to some embodiments of this application, the motor further includes a radial stator, which is installed in the mounting cavity and nested with the rotor.

[0026] According to some embodiments of this application, the radial stator includes a radial stator core and a radial stator winding, the radial stator winding being wound around the radial stator core; a medium inlet is provided on the housing of the motor, the radial stator core is sleeved on the radial outer side of the rotor, the radial stator core has a stator flow path, the stator flow path is connected to the medium inlet and extends at least along the axial direction of the radial stator core.

[0027] According to some embodiments of this application, the end of the radial stator core is provided with an end oil guide ring, the end oil guide ring has an oil injection hole, the stator flow path is connected to the oil injection hole, and at least a portion of the oil injection hole is disposed opposite to the radial stator winding.

[0028] According to some embodiments of this application, the radial stator winding protrudes axially from the radial stator core, and the oil injection hole includes a radial oil injection hole, which is disposed opposite to the radial stator winding in the radial direction of the radial stator.

[0029] According to some embodiments of this application, the radial stator core includes a first stator lamination group and a second stator lamination group located at both axial ends of the first stator lamination group. The first stator lamination group includes one or more first stator laminations stacked axially, and the second stator lamination group includes one or more second stator laminations stacked axially. The stator flow path is formed in the first stator lamination group and the second stator lamination group.

[0030] According to some embodiments of this application, the stator flow path includes a composite flow path that extends along the axial and radial directions of the radial stator.

[0031] According to some embodiments of this application, the first stator lamination is provided with a first outer oil guide groove and a first inner oil guide groove, the first inner oil guide groove being located radially inside the first outer oil guide groove. The second stator lamination is provided with a second inner oil guide groove. The composite flow path includes a connected axial flow path and a radial flow path. The first inner oil guide groove and the second inner oil guide groove are axially connected to form part of the axial flow path. When the first stator lamination group includes the plurality of first stator laminations, at least two adjacent first stator laminations among the plurality of first stator laminations are staggered along the circumferential direction so that the first outer oil guide groove and the first inner oil guide groove of different first stator laminations are connected radially to form the radial flow path.

[0032] According to some embodiments of this application, the second stator lamination is provided with a second outer oil guide groove, the second inner oil guide groove is located radially inside the second outer oil guide groove, and the first outer oil guide groove and the second outer oil guide groove are connected in the axial direction of the radial stator to form part of the axial flow path.

[0033] According to some embodiments of this application, the first external oil guide groove is disposed on the yoke of the first stator lamination. The first external oil guide groove includes a first groove formed by the outer edge of the first stator lamination recessed radially inward along the first stator lamination and a second groove separated from the outer edge of the first stator lamination. At least a portion of the first end of the first internal oil guide groove is disposed on the tooth of the first stator lamination, and at least a portion of the second end of the first internal oil guide groove extends to the yoke of the first stator lamination. At least one of the first groove and the second groove is adapted to communicate axially with the second external oil guide groove.

[0034] According to some embodiments of this application, the at least two adjacent first stator laminations are staggered along the circumferential direction of the radial stator so that the first slots and second slots of different first stator laminations are radially connected, and the second slots of different first stator laminations are radially connected to the first inner oil guide groove to form the radial flow path.

[0035] According to some embodiments of this application, the first groove includes a first groove portion and a second groove portion, the second groove portion is connected to the first groove portion, the second groove portion extends radially inward, the radial inner end radius of the first groove portion is greater than the radial outer end radius of the second groove portion, and the radial inner end radius of the second groove portion is smaller than the radial outer end radius of the second groove portion.

[0036] According to some embodiments of this application, the first inner oil guide groove includes a third sub-groove, the first end of the third sub-groove is disposed on the tooth portion of the first stator lamination, the second end of the third sub-groove extends to the yoke portion of the first stator lamination, and the radial outer end radius of the third sub-groove is greater than the radial inner end radius of the second sub-groove.

[0037] According to some embodiments of this application, the first inner oil guide groove further includes a fourth sub-groove, the fourth sub-groove satisfying at least one of the following: disposed on the tooth portion of the first stator lamination, and located between two adjacent tooth portions.

[0038] According to some embodiments of this application, the first outer oil guide groove and the second outer oil guide groove are axially connected to form a first axial flow path, the first inner oil guide groove and the second inner oil guide groove are axially connected to form a second axial flow path, and the first axial flow path and the second axial flow path are connected through the radial flow path.

[0039] According to some embodiments of this application, the magnetic adjustment assembly includes an axial stator, the axial stator including an axial stator core and an axial stator winding wound around the axial stator core, and the medium ejected from the second axial flow path is adapted to spray onto the axial stator winding.

[0040] According to some embodiments of this application, the outer edge of the first stator lamination is recessed radially inward to form a first oil guide groove, and the second stator lamination is provided with a second oil guide groove. The second oil guide groove is separated from the edge of the second stator lamination, and the first oil guide groove is connected to the second oil guide groove.

[0041] The motor according to an embodiment of this application includes the motor cooling assembly, wherein the motor cooling assembly includes a radial stator core.

[0042] According to some embodiments of this application, a composite flow path is formed in the radial stator core, the composite flow path extending along the axial and radial directions of the radial stator core.

[0043] According to some embodiments of this application, the composite flow path includes at least one axial flow path and at least one radial flow path, wherein the at least one radial flow path is connected to the at least one axial flow path.

[0044] According to some embodiments of this application, the first stator lamination group includes a plurality of stator laminations, wherein at least two adjacent first stator laminations are arranged with staggered teeth along the circumferential direction, so that the first outer oil guide groove and the first inner oil guide groove of different first stator laminations are connected in the radial direction of the first stator laminations to form the radial flow path.

[0045] According to some embodiments of this application, the stator core further includes a second stator lamination group, wherein a second inner oil guide groove on the second stator lamination group can be axially connected to the first inner oil guide groove to form part of the axial flow path.

[0046] According to some embodiments of this application, the second outer oil guide groove of the second stator lamination group is axially connected to the first outer oil guide groove to form part of the axial flow path.

[0047] According to some embodiments of this application, the motor cooling assembly further includes a housing, the housing having an internal mounting cavity, the stator core being installed in the mounting cavity, and a medium inlet being provided on the housing, with the composite flow path communicating with the medium inlet.

[0048] According to some embodiments of this application, the motor cooling assembly further includes a radial stator winding wound around the radial stator core, the radial stator core being sleeved on the radial outer side of the rotor.

[0049] According to some embodiments of this application, the axial end of the radial stator core is provided with an end oil guide ring, the end oil guide ring has an oil injection hole, the composite flow path is connected to the oil injection hole, and at least a portion of the oil injection hole is disposed opposite to the radial stator winding.

[0050] According to the embodiments of the present application, the stator lamination of the motor is provided with a first outer oil guide groove and a first inner oil guide groove spaced apart, so that a medium can be introduced into the first outer oil guide groove and the first inner oil guide groove to cool the stator lamination. At the same time, the first inner oil guide groove is located radially inside the first outer oil guide groove, so that cooling can be achieved at different radial positions of the stator lamination, resulting in good cooling effect.

[0051] According to some embodiments of this application, the radial stator winding protrudes axially from the radial stator core, and the oil injection hole includes a radial oil injection hole, which is arranged opposite to the radial stator winding in the radial direction of the radial stator core.

[0052] According to some embodiments of this application, the radial stator core and the rotor are nested together radially along the rotor.

[0053] According to the embodiments of the present application, the stator lamination of the motor is provided with a first outer oil guide groove and a first inner oil guide groove spaced apart, so that a medium can be introduced into the first outer oil guide groove and the first inner oil guide groove to cool the stator lamination. At the same time, the first inner oil guide groove is located radially inside the first outer oil guide groove, so that cooling can be achieved at different radial positions of the stator lamination, resulting in good cooling effect.

[0054] According to some embodiments of this application, the motor further includes an axial stator disposed at at least one end of the rotor along the axial direction, and the position of the axial stator relative to the axial direction of the rotor is adjustable, wherein the medium ejected from the composite flow path in the radial stator core is adapted to spray onto the axial stator.

[0055] According to some embodiments of this application, the motor cooling assembly includes a housing with a movable cavity inside. The motor also includes a magnetic adjustment slider, the axial stator is connected to the magnetic adjustment slider, the magnetic adjustment slider is movably disposed in the movable cavity at the corresponding end of the rotor, and the amount of medium in the movable cavity is adjustable to change the axial distance between the magnetic adjustment slider and the rotor.

[0056] According to some embodiments of this application, the outer casing is provided with a first inlet and a second inlet, both of which are in communication with the moving cavity; the magnetic adjustment slider separates the first inlet and the second inlet, and the medium introduced into the moving cavity through the first inlet is suitable for pushing the magnetic adjustment slider axially closer to the rotor, and the medium introduced into the moving cavity through the second inlet is suitable for pushing the magnetic adjustment slider axially away from the rotor.

[0057] According to some embodiments of this application, the rotor includes a plurality of rotor laminations and at least one rotor magnetic block, the plurality of rotor laminations being stacked along the axial direction of the rotor, and any one of the at least one rotor magnetic blocks passing through the plurality of rotor laminations along the axial direction of the rotor.

[0058] According to some embodiments of this application, in a plane projection perpendicular to the axial direction of the at least one rotor, the rotor magnetic block at least partially overlaps with the axial stator.

[0059] According to some embodiments of this application, the motor further includes: a rotating shaft and a rotor magnetic shielding plate, the rotor is mounted on the rotating shaft, the rotor magnetic shielding plate is disposed at both ends of the rotor along the axial direction and the rotor magnetic shielding plate is connected to the rotating shaft, and the rotor magnetic guide block passes through the rotor magnetic shielding plate along the axial direction of the rotor.

[0060] The motor according to the application embodiment further includes a stator core, the stator core including a radial stator core; the radial stator core includes a first stator lamination group, the first stator lamination group including the aforementioned stator laminations.

[0061] According to the embodiments of the present application, the stator laminations of the motor are provided with a first outer oil guide groove and a first inner oil guide groove spaced apart, so that a medium can be introduced into the first outer oil guide groove and the first inner oil guide groove to cool the stator laminations. At the same time, the first inner oil guide groove is located radially inside the first outer oil guide groove, so that cooling can be achieved at different radial positions of the stator laminations, resulting in good cooling effect.

[0062] According to some embodiments of this application, the first stator lamination group includes a plurality of first stator laminations, wherein at least two adjacent first stator laminations are staggered along the circumferential direction of the radial stator core, such that the first outer oil guide groove and the first inner oil guide groove of different first stator laminations are connected in the radial direction of the first stator laminations.

[0063] According to some embodiments of this application, the stator core further includes a second stator lamination group, which is disposed at both axial ends of the first stator lamination group.

[0064] According to some embodiments of this application, the second stator lamination group is provided with a second inner oil guide groove, which can be axially connected to the first inner oil guide groove.

[0065] According to some embodiments of this application, the second stator lamination group is further provided with a second outer oil guide groove, the second outer oil guide groove is located radially outside the second inner oil guide groove, and the second outer oil guide groove can be axially connected to the first outer oil guide groove.

[0066] According to some embodiments of this application, the second stator lamination group is formed by stacking a plurality of second stator laminations axially.

[0067] According to some embodiments of this application, the stator core includes stator laminations, the stator laminations include a first stator lamination, the first inner oil guide groove is spaced apart from the first outer groove, and their projections along the radial direction of the first stator lamination at least partially overlap.

[0068] According to the embodiments of this application, the motor has a first outer oil guide groove and a first inner oil guide groove spaced apart, which facilitates the introduction of a medium into the first outer oil guide groove and the first inner oil guide groove to cool the first stator lamination. At the same time, the first inner oil guide groove is located radially inside the first outer oil guide groove, so that the first stator lamination can be cooled at different radial positions, resulting in a good cooling effect.

[0069] According to some embodiments of this application, the first external oil guide groove is disposed on the yoke portion of the first stator lamination. The first external oil guide groove is formed by the radial inward recess of the outer edge of the first stator lamination. At least a portion of the first internal oil guide groove has its first end disposed on the tooth portion of the first stator lamination and its second end extending to the yoke portion of the first stator lamination.

[0070] According to some embodiments of this application, the first external oil guide groove is disposed on the yoke of the first stator lamination. The first external oil guide groove includes a first groove formed by the radial inward recess of the outer edge of the first stator lamination and a second groove separated from the outer edge of the stator lamination. At least a portion of the first internal oil guide groove has a first end disposed on the tooth portion of the stator lamination and a second end extending to the yoke of the stator lamination.

[0071] According to some embodiments of this application, the first sub-slot and the first inner oil guide groove satisfy at least one of the following: the projections of the first sub-slot and the first inner oil guide groove along their radial direction at least partially overlap; and the projections of the second sub-slot and the first inner oil guide groove along their radial direction at least partially overlap.

[0072] According to some embodiments of this application, the projection of the second sub-groove along the radial direction of the first inner oil guide groove at least partially overlaps with that of the first inner oil guide groove, and the projection of the first sub-groove along the radial direction of the first inner oil guide groove does not overlap with that of the first inner oil guide groove.

[0073] According to some embodiments of this application, the first slot includes a first slot portion and a second slot portion, the second slot portion is connected to the first slot portion, the second slot portion extends radially inward, the projection of the first slot portion and the second slot portion along the radial direction of the second slot portion at least partially overlaps, and the projection of the second slot portion and the second slot portion along its radial direction at least partially overlaps.

[0074] According to some embodiments of this application, the first inner oil guide groove includes a third sub-groove, the first end of which is disposed on the tooth portion of the stator lamination, and the second end of which extends to the yoke portion of the stator lamination.

[0075] According to some embodiments of this application, the third sub-slot and the first external oil guide slot satisfy at least one of the following: the projection of the third sub-slot and the first sub-slot along the radial direction of the first sub-slot at least partially overlaps; and the projection of the third sub-slot and the second sub-slot along the radial direction of the second sub-slot at least partially overlaps.

[0076] According to some embodiments of this application, the first inner oil guide groove further includes a fourth sub-groove, wherein the fourth sub-groove satisfies at least one of the following: the fourth sub-groove is disposed on the tooth portion of the stator lamination, and the fourth sub-groove is located between two adjacent teeth portions.

[0077] Thirdly, a vehicle is provided, the vehicle including an electric drive system, the electric drive system including the aforementioned motor.

[0078] According to some embodiments of the present application, the first stator lamination of the motor is provided with a first outer oil guide groove and a first inner oil guide groove spaced apart, so that a medium can be introduced into the first outer oil guide groove and the first inner oil guide groove to cool the first stator lamination. At the same time, the first inner oil guide groove is located radially inside the first outer oil guide groove, so that the first stator lamination can be cooled at different radial positions, resulting in good cooling effect.

[0079] 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

[0080] Figure 1 is a cross-sectional view of a motor according to some embodiments of this application;

[0081] Figure 2 is a magnified view of part A in Figure 1;

[0082] Figure 3 is a magnified view of part B in Figure 1;

[0083] Figure 4 is a schematic diagram of a portion of the first stator lamination of the motor shown in Figure 1;

[0084] Figure 5 is a schematic diagram of a portion of the second stator lamination of the motor shown in Figure 1;

[0085] Figure 6 is a schematic diagram of a portion of the rotor;

[0086] Figure 7 is a schematic diagram of a portion of the rotor laminations;

[0087] Figure 8 is a schematic diagram of the rotor magnetic shielding plate;

[0088] Figure 9 is a cross-sectional view of a motor according to some embodiments of this application;

[0089] Figure 10 is a schematic diagram of a portion of the first stator lamination of the motor shown in Figure 9;

[0090] Figure 11 is a schematic diagram of a portion of the second stator lamination of the motor shown in Figure 9;

[0091] Figure 12 is a block diagram of an electric drive system according to some embodiments of this application;

[0092] Figure 13 is a block diagram of a vehicle according to some embodiments of this application.

[0093] Reference numerals: Vehicle 100, Electric drive system 90, Motor 10, Housing 1, Moving cavity 11, Mounting cavity 12, First inlet 13, Second inlet 14, Medium inlet 15, End cover 16, Housing 17, Rotor 2, Rotor lamination 21, Rotor shaft hole 211, Magnetic guide block slot 212, Magnet slot 213, Rotor magnetic guide block 22, Permanent magnet 23, Magnetizing assembly 3, Axial stator 31, Axial stator core 311, Axial stator winding 312, Magnetizing slider 32, Mating part 321, Connecting part 322, Radial stator 4, Radial stator core 41, First stator lamination 411, First outer oil guide groove 4111, First sub-groove 41111, First groove portion 41111a, Second groove portion 41111b, Second sub-groove 41112, First inner oil guide groove 4112, ... Three-part slot 41121, fourth-part slot 41122, first oil guide groove 4113, first stator slot 4114, second stator lamination 412, second outer oil guide groove 4121, second inner oil guide groove 4122, second oil guide groove 4123, second stator slot 4124, radial stator winding 42, stator flow path 43, composite flow path 431, axial flow path 4311, first axial flow path 43111, second axial flow path 43112, radial flow path 4312, end oil guide ring 5, rotor magnetic shielding plate 6, magnetic shielding plate through hole 61, magnetic shielding plate shaft hole 62, rotating shaft 7, first bearing 81, second bearing 82, air gap 9. Detailed Implementation

[0094] 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 intended to explain this application, and should not be construed as limiting this application.

[0095] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly defined.

[0096] The operating magnetic field of the motor in the relevant technology is fixed and cannot be adjusted, making it difficult to meet the needs of different operating magnetic fields. Therefore, there is room for improvement.

[0097] Therefore, some embodiments of this application provide a magnetizing component 3, a motor 10, an electric drive system 90 having the motor 10, and a vehicle 100 having the electric drive system 90.

[0098] The following describes in detail, with reference to the accompanying drawings, some embodiments of the magnetic adjustment assembly 3, the motor 10, the electric drive system 90 having the motor 10, and the vehicle 100 having the electric drive system 90 according to the present application.

[0099] According to some embodiments of this application, the magnetic flux adjustment component 3 can be used in the motor 10. The magnetic flux adjustment component 3 is disposed at at least one end of the rotor 2 of the motor 10 in the axial direction. The position of the magnetic flux adjustment component 3 in the axial direction of the rotor 2 is adjustable to adjust the magnetic flux through the rotor 2.

[0100] According to some embodiments of this application, the magnetic flux adjustment component 3 can be adjusted to move closer to or further away from the rotor 2 along the axial direction by adjusting the position of the magnetic flux adjustment component 3 on the rotor 2, thereby achieving effective adjustment of the magnetic flux of the rotor 2 and thus effective adjustment of the working magnetic field of the motor 10.

[0101] In some embodiments of this application, referring to Figures 1-3 and Figure 9, the magnetic adjustment assembly 3 includes an axial stator 31 and a magnetic adjustment slider 32. The magnetic adjustment slider 32 is movable in the axial direction of the rotor 2, and the axial stator 31 is fixedly connected to the magnetic adjustment slider 32. When the magnetic adjustment slider 32 moves in the axial direction of the rotor 2, it can drive the axial stator 31 to move synchronously. For example, the magnetic adjustment slider 32 can drive the axial stator 31 to move synchronously closer to or synchronously away from the rotor 2 along the axial direction, thereby realizing the effective adjustment of the working magnetic field of the motor 10.

[0102] In some embodiments of this application, the axial stator 31 includes an axial stator core 311 and an axial stator winding 312. The axial stator core 311 is fixedly connected to the magnetic adjustment slider 32, and the axial stator winding 312 is wound around the axial stator core 311. When the magnetic adjustment slider 32 moves axially in the rotor 2, it can drive the axial stator core 311 to move synchronously. For example, the magnetic adjustment slider 32 can drive the axial stator core 311 to move synchronously closer to or farther away from the rotor 2 along the axial direction, thereby causing the axial stator winding 312 to move synchronously closer to or farther away from the rotor 2 along the axial direction.

[0103] The axial stator winding 312 of the axial stator 31 can effectively utilize the wasted space at the end of the rotor 2, which is beneficial to improving the space utilization of the motor 10, providing additional power and torque, and increasing the power density and torque density of the motor 10.

[0104] For example, the fixed connection between the axial stator core 311 and the magnetic adjustment slider 32 can be achieved by one or more combinations of methods such as adhesive fixing, screw fixing, tight fit fixing, snap fixing, and welding fixing.

[0105] For example, when the motor 10 does not adjust the magnetic flux, the axial stator 31 is set away from the rotor 2. When the magnetic flux needs to be adjusted, the magnetic adjustment slider 32 drives the axial stator 31 to move closer to the rotor 2.

[0106] For example, the axial stator core 311 is made of a magnetically conductive material.

[0107] For example, the axial stator core 311 can be made of wound steel sheets, thereby reducing iron loss and improving the efficiency of the motor 10.

[0108] In some embodiments of this application, referring to Figures 1-3 and 9, the axial stator core 311 is fixedly connected to the end of the magnetic adjustment slider 32 closest to the rotor 2. In this way, the axial stator core 311 is closer to the rotor 2 than the magnetic adjustment slider 32, and there is no magnetic adjustment slider 32 obstructing the connection between the axial stator core 311 and the rotor 2. This makes it easier to generate a magnetic field between the axial stator core 311 and the rotor 2, and allows for more sensitive adjustment of the magnetic field between the axial stator 31 and the rotor 2 when the axial position of the axial stator 31 changes.

[0109] In some embodiments of this application, the magnetic adjustment component 3 may move only along the axial direction of the rotor 2, that is, the magnetic adjustment component 3 only moves up and down relative to the rotor 2.

[0110] In some embodiments of this application, the magnetizing component 3 satisfies at least one of the following: the magnetizing component 3 can also move circumferentially along the rotor 2; and the magnetizing component 3 can move radially along the rotor 2.

[0111] For example, while the magnetic adjustment component 3 moves along the axial direction of the rotor 2, it can also move in at least one direction, either circumferential or radial, of the rotor 2. For example, the magnetic adjustment component 3 can be spirally raised and lowered relative to the rotor 2. In this case, the magnetic adjustment component 3 moves along the axial direction of the rotor 2, and simultaneously moves along the circumferential direction of the rotor 2.

[0112] For example, the magnetic adjustment component 3 can move up and down and radially relative to the rotor 2 at the same time. At this time, the magnetic adjustment component 3 moves along the axial direction of the rotor 2 and at the same time moves radially along the rotor 2.

[0113] Referring to Figures 1-3 and 9, a motor 10 according to some embodiments of this application includes a rotor 2 and a magnetic adjustment assembly 3, the magnetic adjustment assembly 3 being movably disposed at at least one end of the rotor 2 in the axial direction.

[0114] The motor 10 also includes a housing 1, which has a mounting cavity 12 inside, and the rotor 2 is rotatably mounted in the mounting cavity 12.

[0115] The magnetizing assembly 3 is mounted on the housing 1. For example, the housing 1 has a movable cavity 11 inside, which is located at at least one end of the rotor 2 in the axial direction. In the examples of Figures 1-3 and 9, the movable cavity 11 is only located at the upper axial end of the rotor 2. In some embodiments, the movable cavity 11 may also be located at the lower axial end of the rotor 2, or the movable cavity 11 may be located at both the upper and lower axial ends of the rotor 2.

[0116] The magnetic adjustment component 3 is a component that adjusts the air gap magnetic field of the motor 10 by changing the leakage flux of the permanent magnet. The magnetic adjustment component 3 is movably disposed in the moving cavity 11 at the corresponding end of the rotor 2. The amount of medium in the moving cavity 11 is adjustable to change the axial distance between the magnetic adjustment component 3 and the rotor 2.

[0117] According to some embodiments of the present application, the motor 10 can be adjusted by adjusting the axial distance between the magnetic adjustment component 3 and the rotor 2, so that the magnetic adjustment component 3 can be moved closer to or further away from the rotor 2 along the axial direction, thereby realizing the effective adjustment of the magnetic flux of the rotor 2, and thus realizing the effective adjustment of the working magnetic field of the motor 10.

[0118] In some embodiments of this application, referring to Figures 1-3 and Figure 9, the outer casing 1 has a first inlet 13 and a second inlet 14, both of which are connected to the movable cavity 11. The movable cavity 11 can communicate with the outside of the outer casing 1 through the first inlet 13, and the movable cavity 11 can also communicate with the outside of the outer casing 1 through the second inlet 14.

[0119] For example, one or more first inlets 13 may be provided on the outer casing 1. When multiple first inlets 13 are provided on the outer casing 1, the multiple first inlets 13 may be located at the same end of the rotor 2 in the axial direction, or they may be located at opposite ends of the rotor 2 in the axial direction.

[0120] For example, one or more second inlets 14 may be provided on the outer casing 1. When multiple second inlets 14 are provided on the outer casing 1, the multiple second inlets 14 may be located at the same end of the rotor 2 in the axial direction, or they may be located at opposite ends of the rotor 2 in the axial direction.

[0121] The magnetic adjustment assembly 3 separates the first inlet 13 and the second inlet 14. For example, the first inlet 13 and the second inlet 14 can be located at opposite ends of the magnetic adjustment assembly 3. The medium introduced into the moving cavity 11 through the first inlet 13 is suitable for pushing the magnetic adjustment assembly 3 axially closer to the rotor 2, and the medium introduced into the moving cavity 11 through the second inlet 14 is suitable for pushing the magnetic adjustment assembly 3 axially away from the rotor 2, thereby achieving effective adjustment of the working magnetic field of the motor 10.

[0122] In other words, a medium can be introduced into the moving cavity 11 through either the first inlet 13 or the second inlet 14 to adjust the axial distance between the magnetic adjustment component 3 and the rotor 2, thereby changing the magnitude of the magnetic field between them. The different positions of the first inlet 13 and the second inlet 14 result in different positions for the medium introduced into the moving cavity 11.

[0123] In the examples shown in Figures 1-3 and 9, the magnetic adjustment component 3 is located at only one end of the rotor 2. Alternatively, magnetic adjustment components 3 can be provided at both ends of the rotor 2 to achieve the aforementioned magnetic adjustment function, which not only improves the magnetic adjustment capability but also eliminates axial unbalanced magnetic pull.

[0124] The magnetic adjustment assembly 3 has a mating part 321 that moves and engages with the wall of the moving cavity 11. A medium introduced into the moving cavity 11 via the first inlet 13 is located in a first direction of the mating part 321. As the amount of medium in the mating part 321 increases in the first direction, the pressure of this medium can push the mating part 321 to move in a second direction. A medium introduced into the moving cavity 11 via the second inlet 14 is located in a second direction of the mating part 321. As the amount of medium in the mating part 321 increases in the second direction, the pressure of this medium can push the mating part 321 to move in the first direction. The first and second directions are opposite directions.

[0125] For example, in the examples shown in Figures 1-3 and 9, the axial direction of rotor 2 is vertical, with the first direction being upward and the second direction being downward. The medium introduced into the moving cavity 11 through the first inlet 13 is located above the mating part 321. As the amount of medium above the mating part 321 increases, the pressure of this medium pushes the mating part 321 downward. The medium introduced into the moving cavity 11 through the second inlet 14 is located below the mating part 321. As the amount of medium below the mating part 321 increases, the pressure of this medium pushes the mating part 321 upward. Adjusting the amount of medium entering through the first inlet 13 and the second inlet 14 adjusts the vertical movement of the mating part 321 within the moving cavity 11, thereby adjusting the axial relative position of the magnetic adjustment assembly 3 and rotor 2.

[0126] For example, the magnetic adjustment component 3 is slidably disposed within the movable cavity 11.

[0127] For example, the magnetic adjustment component 3 can be rotatably disposed within the movable cavity 11.

[0128] In the examples shown in Figures 1-3 and 9, the mating part 321 is fitted and slidably engaged with the cavity wall of the movable cavity 11, and the medium above the mating part 321 is separated from the medium below the mating part 321 by the mating part 321.

[0129] For example, the first inlet 13 can be directly connected to a medium source outside the housing 1, or it can be connected to a medium source through a connecting pipe. Similarly, the second inlet 14 can be directly connected to a medium source outside the housing 1, or it can be connected to a medium source through a connecting pipe. The medium source connected to the first inlet 13 and the medium source connected to the second inlet 14 can be the same or different. The medium source can be a hydraulic system, which can provide driving force for the medium, making it easier for the medium to flow to the target position. In this way, the magnetic adjustment component 3 can reciprocate and rely on the hydraulic system to achieve hydraulic actuation without the need for additional equipment.

[0130] In some embodiments, the medium source connected to the first inlet 13 and the second inlet 14 is the medium used for cooling the motor 10. The motor 10 can be magnetized by using the cooling oil of the motor 10, forming a "cooling plus hydraulic" oil circuit reuse, which is simple in structure and has no additional energy consumption.

[0131] For example, the medium can be a gas, such as helium or nitrogen; or it can be a liquid, such as lubricating oil or water.

[0132] According to some embodiments of the present application, the motor 10 can be driven by the medium introduced into the moving cavity 11 through the first inlet 13 to push the magnetic adjustment component 3 to move closer to the rotor 2 along the axial direction, and the medium introduced into the moving cavity 11 through the second inlet 14 can push the magnetic adjustment component 3 to move away from the rotor 2 along the axial direction, thereby realizing the effective adjustment of the working magnetic field of the motor 10.

[0133] According to some embodiments of this application, the motor 10 can effectively adjust the permanent magnet magnetic field and control the no-load back EMF and voltage of the motor 10 in real time. For example, in the low-speed region, the no-load back EMF (i.e., permanent magnet flux linkage) can be increased by adjusting the magnet, thereby increasing the torque performance and power performance in the low-speed region. In the high-speed region, the no-load back EMF can be reduced in real time by adjusting the magnet. This can not only reduce core losses, widen the constant power region, and increase the peak torque or power in the high-speed region, but also prevent the inverter from being damaged by overvoltage, thus adding a layer of protection to the electric drive system.

[0134] In addition, it helps to improve the high-efficiency range of motor 10, and achieve a high degree of matching between the high-efficiency range of motor 10 and the operating point of new energy vehicle, thereby reducing power consumption and improving economy.

[0135] In addition to adjusting the permanent magnet flux linkage, the variable flux permanent magnet motor 10 in some embodiments of this application can also adjust the winding inductance (the magnetic guiding component in the magnetic adjustment component 3 is conducive to increasing the inductance of the motor 10), which is conducive to reusing the inductance of the motor 10 to realize the self-heating or charging functions of the vehicle battery, reducing current harmonics, thereby reducing the risk of magnet heating and demagnetization.

[0136] In some embodiments of this application, referring to Figures 1-3 and Figure 9, the magnetic adjustment assembly 3 includes an axial stator 31 and a magnetic adjustment slider 32. The magnetic adjustment slider 32 is movably disposed in the moving cavity 11, which is connected to a first inlet 13 and a second inlet 14. The magnetic adjustment slider 32 can separate the first inlet 13 and the second inlet 14. For example, the first inlet 13 and the second inlet 14 can be located at opposite ends of the magnetic adjustment slider 32.

[0137] The medium introduced into the moving cavity 11 through the first inlet 13 pushes the magnetic adjustment slider 32 axially closer to the rotor 2. The magnetic adjustment slider 32 drives the axial stator core 311 to synchronously move axially closer to the rotor 2. The medium introduced into the moving cavity 11 through the second inlet 14 pushes the magnetic adjustment slider 32 axially away from the rotor 2. The magnetic adjustment slider 32 drives the axial stator core 311 to synchronously move axially away from the rotor 2, thereby achieving effective adjustment of the working magnetic field of the motor 10. Adjusting the amount of medium entering through the first inlet 13 and the second inlet 14 can adjust the up and down movement of the magnetic adjustment slider 32 within the moving cavity 11, thereby adjusting the axial relative position of the axial stator 31 and the rotor 2.

[0138] In other words, a medium can be introduced into the moving cavity 11 through the first inlet 13 or through the second inlet 14 to adjust the axial distance between the magnetic slider 32 and the rotor 2, thereby changing the magnetic flux through the rotor 2.

[0139] In some embodiments of this application, referring to Figures 1-3 and Figure 9, the magnetic slider 32 includes a mating portion 321. The first inlet 13 and the second inlet 14 can be located at opposite ends of the mating portion 321; in other words, the mating portion 321 can be located between the first inlet 13 and the second inlet 14. The mating portion 321 fits against the cavity wall of the moving cavity 11 and can move along the cavity wall of the moving cavity 11.

[0140] The mating part 321 slides into the wall of the moving cavity 11, dividing the moving cavity 11 into two parts: a first sub-cavity located above the moving cavity 11 and a second sub-cavity located below the moving cavity 11. The first sub-cavity is connected to a medium source through a first inlet 13, and the second sub-cavity is connected to a medium source through a second inlet 14. Sufficient medium is introduced into the first sub-cavity through the first inlet 13, which pushes the mating part 321 downwards; sufficient medium is introduced into the second sub-cavity through the second inlet 14, which pushes the mating part 321 upwards. As the mating part 321 moves, the volumes of the first and second sub-cavities change accordingly. For example, when the mating part 321 moves downwards, the volume of the first sub-cavity increases, and the volume of the second sub-cavity decreases; when the mating part 321 moves upwards, the volume of the first sub-cavity decreases, and the volume of the second sub-cavity increases.

[0141] When the first inlet 13 and the second inlet 14 are connected to the hydraulic system, the first and second sub-cavities can be used as hydraulic flow channels.

[0142] In some embodiments of this application, referring to Figures 1-3 and 9, a sealing ring can be provided at the sliding contact between the mating part 321 and the cavity wall of the moving cavity 11 to more thoroughly isolate the first and second sub-cavities. For example, a sealing groove is formed on one of the outer peripheral surface of the mating part 321 and the cavity wall of the moving cavity 11, and the sealing ring is partially installed in the sealing groove. The sealing ring is adapted to fit against the other outer peripheral surface of the mating part 321 and the cavity wall of the moving cavity 11. In this way, the sealing ring can effectively block the flow of the medium between the first and second sub-cavities.

[0143] In some embodiments of this application, referring to Figures 1-3 and Figure 9, the magnetic slider 32 further includes a connecting part 322. One end of the connecting part 322 is fixedly connected to the mating part 321, and the other end of the connecting part 322 is fixedly connected to the axial stator 31, for example, the other end of the connecting part 322 is fixedly connected to the axial stator core 311.

[0144] For example, there are various ways to fix the connection between the connecting part 322 and the axial stator 31. For example, the connecting part 322 and the axial stator 31 can be fixedly connected by threads, by tight fit, or by other methods such as adhesive.

[0145] In some embodiments of this application, referring to Figures 1 and 9, the motor 10 further includes a radial stator 4, which is installed in the mounting cavity 12 and nested with the rotor 2.

[0146] For example, in the examples of Figures 1 and 9, the radial stator 4 can be fitted onto the radial outer side of the rotor 2. For example, the rotor 2 can be fitted onto the radial outer side of the radial stator 4, in which case the medium flowing through the internal flow path of the radial stator 4 can enter through the inlet at the shaft end of the radial stator 4. When the rotor 2 rotates, the rotor 2 and the radial stator 4 move relative to each other in a circumferential direction, which can generate a magnetic field.

[0147] In some embodiments of this application, referring to Figures 1 and 9, the radial stator 4 includes a radial stator core 41 and a radial stator winding 42, with the radial stator winding 42 wound around the radial stator core 41; a medium inlet 15 is provided on the outer casing 1, and the radial stator core 41 is sleeved on the radial outer side of the rotor 2. The radial stator core 41 has a stator flow path 43, which communicates with the medium inlet 15 and extends at least along the axial direction of the radial stator core 41.

[0148] The medium inlet 15 connects the mounting cavity 12 to the outside of the outer casing 1. After the radial stator 4 is installed in the mounting cavity 12, the medium inlet 15 is connected to the stator flow path 43, allowing the medium to flow into the stator flow path 43 through the medium inlet 15. The medium in the stator flow path 43 can cool the radial stator 4, and the cooled radial stator core 41 can further cool the radial stator winding 42. When the medium in the stator flow path 43 is lubricating oil, it can also lubricate the radial stator core 41. For ease of description, this application uses the example of the medium in the stator flow path 43 being used to cool the radial stator 4 to illustrate the structure of the stator flow path 43.

[0149] For example, the outer casing 1 may have one or more medium inlets 15. Alternatively, the outer casing 1 may have multiple medium inlets 15, distributed along the circumference of the outer casing 1, thereby increasing the amount of medium entering the stator flow path 43 through the medium inlets 15. After entering the motor 10 through the medium inlets 15, the medium passes through the stator flow path 43 inside the radial stator core 41, cooling the radial stator core 41. The medium then exits the stator flow path 43, cooling the ends of the radial stator windings 42. Furthermore, the lower temperature of the radial stator core 41 allows for contact cooling of the radial stator windings 42. The stator flow path 43 effectively cools the radial stator 4, preventing overheating and damage or other adverse consequences.

[0150] In some embodiments, the inlet of the stator flow path 43 of the radial stator 4 may be located at the shaft end of the radial stator 4.

[0151] In some embodiments of this application, referring to Figures 1-3 and Figure 9, the radial stator core 41 is provided with an end oil guide ring 5. The end oil guide ring 5 has an oil spray hole, and the stator flow path 43 communicates with the oil spray hole. At least a portion of the oil spray hole is disposed opposite to the radial stator winding 42. The medium in the stator flow path 43 can be sprayed out from the oil spray hole, and the medium sprayed out from the oil spray hole can cool the radial stator winding 42, preventing the radial stator winding 42 from being damaged due to excessive temperature or causing other adverse consequences. The stator flow path 43 is supplied with oil through the medium inlet 15, and the oil flows through the stator flow path 43 and the end oil guide ring 5, ultimately cooling the end of the radial stator winding 42.

[0152] In some embodiments of this application, referring to Figures 1-3 and Figure 9, the radial stator winding 42 protrudes axially from the radial stator core 41, and the oil injection hole includes a radial oil injection hole, which is arranged opposite to the radial stator winding 42 in the radial direction of the radial stator 4.

[0153] In this way, the radial oil injection holes can spray the medium into the radial stator winding 42 in the radial direction of the radial stator 4 to cool the radial stator winding 42. For example, the oil injection holes include multiple radial oil injection holes, which are evenly distributed along the circumference, thereby increasing the radial oil injection volume and improving the cooling effect.

[0154] In some embodiments of this application, the oil injection hole may further include an axial oil injection hole, which is disposed opposite to the radial stator core 41 in the axial direction of the radial stator 4. In this way, the axial oil injection hole can spray a medium onto the end of the radial stator core 41 in the axial direction of the radial stator 4 to cool the radial stator 4.

[0155] In some embodiments of this application, referring to Figures 1, 4-5, and 9-11, the radial stator core 41 includes a first stator lamination group and a second stator lamination group. The first stator lamination group is located in the middle, and the first stator lamination group has second stator lamination groups at both axial ends. The first stator lamination group includes one or more first stator laminations 411 stacked axially, and the second stator lamination group includes one or more second stator laminations 412 stacked axially. A stator flow path 43 is formed in the first stator lamination group and the second stator lamination group. Thus, the medium in the stator flow path 43 can cool the first stator lamination group and the second stator lamination group, and the cooled first stator lamination group and the second stator lamination group can further cool the radial stator winding 42.

[0156] The radial stator core 41 is divided into three sections, the upper and lower sections are composed of second stator laminations 412, and the middle section is composed of first stator laminations 411. For example, the proportion of the first stator laminations 411 can be set to be relatively small.

[0157] In some embodiments of this application, referring to Figures 1 and 4-5, the stator flow path 43 is a composite flow path 431, which extends along both the axial and radial directions of the radial stator 4. This allows for better cooling of the radial stator core 41 both axially and radially along the radial stator 4.

[0158] In some embodiments of this application, referring to Figures 1, 4-5, the first stator lamination 411 is provided with a first outer oil guide groove 4111 and a first inner oil guide groove 4112. The first inner oil guide groove 4112 is located radially inside the first outer oil guide groove 4111. The first outer oil guide groove 4111 and the first inner oil guide groove 4112 form a first oil guide groove group. Both the first outer oil guide groove 4111 and the first inner oil guide groove 4112 penetrate the first stator lamination 411 along the thickness direction of the first stator lamination 411.

[0159] The second stator lamination 412 is provided with a second inner oil guide groove 4122. The composite flow path 431 includes an axial flow path 4311 and a radial flow path 4312, which are connected. That is, the medium entering through the medium inlet 15 can flow within the axial flow path 4311 and the radial flow path 4312. The first inner oil guide groove 4112 and the second inner oil guide groove 4122 are axially connected to form at least a part of the axial flow path 4311. At least two adjacent first stator laminations 411 are staggered along the circumferential direction so that the first outer oil guide groove 4111 of different first stator laminations 411 and the first inner oil guide groove 4112 are radially connected to form the radial flow path 4312.

[0160] For example, the first stator lamination group can be formed by multiple first stator laminations 411 that are offset by one tooth width in the circumferential direction (or stacked in the axial direction by reverse displacement) and stacked in a certain axial proportion, thereby forming a composite flow path 431.

[0161] In some embodiments of this application, referring to Figures 1 and 4-5, the second stator lamination 412 is further provided with a second outer oil guide groove 4121, and a second inner oil guide groove 4122 is located radially inside the second outer oil guide groove 4121. The second outer oil guide groove 4121 and the second inner oil guide groove 4122 form a second oil guide groove group. Both the second outer oil guide groove 4121 and the second inner oil guide groove 4122 penetrate the second stator lamination 412 along the thickness direction of the second stator lamination 412. The first outer oil guide groove 4111 and the second outer oil guide groove 4121 are axially connected to form part of the axial flow path 4311.

[0162] Referring to Figure 1, the axial flow path 4311 includes a first axial flow path 43111 and a second axial flow path 43112. The first outer oil guide groove 4111 and the second outer oil guide groove 4121 are axially connected to form the first axial flow path 43111. The first inner oil guide groove 4112 and the second inner oil guide groove 4122 are axially connected to form the second axial flow path 43112. The second axial flow path 43112 and the first axial flow path 43111 both extend along the axial direction of the radial stator 4. The second axial flow path 43112 is located radially inside the first axial flow path 43111. The radial flow path 4312 is located between the first axial flow path 43111 and the second axial flow path 43112, and the radial flow path 4312 connects the first axial flow path 43111 and the second axial flow path 43112.

[0163] A portion of the medium entering through the medium inlet 15 can first enter the first axial flow path 43111 and flow along the axial direction of the radial stator 4 within the first axial flow path 43111. Another portion of the medium can enter the radial flow path 4312 and flow along the radial direction of the radial stator 4 within the radial flow path 4312, and further enter the second axial flow path 43112 and flow along the axial direction of the radial stator 4 within the second axial flow path 43112.

[0164] The medium ejected from the second axial flow path 43112 is suitable for spraying onto the axial stator winding 312 of the axial stator 31, thereby cooling the axial stator winding 312. In other words, the outlet of the second axial flow path 43112 is positioned at least opposite to the magnetizing assembly 3.

[0165] For example, the outlet of the second axial flow path 43112 is at least positioned opposite to the axial stator winding 312. As shown in Figures 1 and 9, the magnetizing assembly 3 includes an axial stator 31 and a magnetizing slider 32, with the upper outlet of the second axial flow path 43112 positioned opposite to the axial stator winding 312 of the axial stator 31. In this way, the medium ejected from the upper outlet of the second axial flow path 43112 can cool the axial stator winding 312 of the axial stator 31, preventing damage due to overheating of the axial stator 31. Thus, the magnetizing assembly 3 (e.g., the axial stator 31) achieves good cooling, and the cooling oil of the motor 10 is used to cool the axial stator 31, improving magnetizing efficiency.

[0166] For the motor 10 shown in Figures 1-3, after oil enters through the medium inlet 15 of the outer casing 1, the oil is divided into two paths. One path cools the yoke of the radial stator core 41 (from the first stator lamination 411 to the second stator lamination 412), the end oil guide ring 5, and the end of the radial stator winding 42. The other path cools the yoke of the radial stator core 41 (the first stator lamination 411), the toothed portion of the radial stator core 41 (from the first stator lamination 411 to the second stator lamination 412), and the axial stator winding 312.

[0167] In some embodiments of this application, referring to Figures 4-5, a first external oil guide groove 4111 is disposed on the yoke of the first stator lamination 411. The first external oil guide groove 4111 is used to connect the medium inlet 15 of the outer casing 1. The first external oil guide groove 4111 includes a first sub-groove 41111 and a second sub-groove 41112. The first sub-groove 41111 is formed by the outer edge of the first stator lamination 411 being recessed radially inward. The first sub-groove 41111 is an open groove on the outside, and the medium entering through the medium inlet 15 can directly enter the first sub-groove 41111. That is to say, the first sub-groove 41111 is an oil inlet groove.

[0168] The second groove 41112 is separated from the outer edge of the first stator lamination 411. The second groove 41112 is a closed groove with inner and outer sides. The medium entering through the medium inlet 15 cannot directly enter the second groove 41112. At least one end of the first inner oil guide groove 4112 is provided at the tooth of the first stator lamination 411, and the other end extends to the yoke of the first stator lamination 411.

[0169] At least two adjacent second stator laminations 412 are staggered along the circumferential direction so that the first slots 41111 and the second slots 41112 of different first stator laminations 411 are connected in the radial direction, and the second slots 41112 and the first inner oil guide grooves 4112 are connected in the radial direction to form a radial flow path 4312.

[0170] For example, when two adjacent first stator laminations 411 are staggered along the circumferential direction, the second slot 41112 of one of the second stator laminations 412 connects the first slot 41111 of the other second stator lamination 412 with the first inner oil guide groove 4112. Thus, the medium at the first slot 41111 can enter the first inner oil guide groove 4112 through the second slot 41112.

[0171] At least one of the first groove 41111 and the second groove 41112 is adapted to be axially connected to the second outer oil guide groove 4121 to form a first axial flow path 43111. In the example shown in FIG5, the second outer oil guide groove 4121 is disposed on the yoke of the second stator lamination 412, the second inner oil guide groove 4122 is disposed on the tooth of the second stator lamination 412, and the first groove 41111 and the second outer oil guide groove 4121 are axially connected.

[0172] In some embodiments, the second sub-groove 41112 may be axially connected to the second outer oil guide groove 4121, or both the first sub-groove 41111 and the second sub-groove 41112 may be axially connected to the second outer oil guide groove 4121.

[0173] It should be noted that the yoke of a stator lamination refers to the structure between the bottom of the stator slot and the outer edge of the stator core. The stator slot is the location for the stator winding. The teeth of the stator lamination are used to separate the stator slots. The yoke and teeth of the stator lamination are common technical terms in the field of motors, and will not be explained in detail here.

[0174] In some embodiments of this application, referring to Figures 4-5, the first groove 41111 includes a first groove portion 41111a and a second groove portion 41111b, the second groove portion 41111b is connected to the first groove portion 41111a, and the second groove portion 41111b extends radially inward.

[0175] For example, the second groove 41111b is located radially inside the first groove 41111a. The radial inner radius R1 of the first groove 41111a is greater than the radial outer radius R3 of the second sub-groove 41112, and the radial inner radius R2 of the second groove 41111b is less than the radial outer radius R3 of the second sub-groove 41112, i.e., R1 > R3, R2 < R3. Thus, when two adjacent first stator laminations 411 are staggered along the circumferential direction, the second groove 41111b of one second stator lamination 412 overlaps radially with the second sub-groove 41112 of the other second stator lamination 412, and the two are connected.

[0176] For example, at least a portion of the first inner oil guide groove 4112 can be arranged radially with the second groove portion 41111b along the first stator lamination 411, and the staggered angle when the teeth are staggered is equal to the central angle between the second groove portion 41111b and the second groove 41112.

[0177] For example, the first external oil guide groove 4111 includes a plurality of second sub-grooves 41112, which are evenly distributed along the circumferential direction.

[0178] For example, the first sub-slot 41111 includes a plurality of second sub-slots 41111b, which are evenly distributed along the circumferential direction. The second sub-slots 41111b and the second sub-slot 41112 are arranged alternately in the circumferential direction.

[0179] In some embodiments of this application, referring to Figures 4-5, the first inner oil guide groove 4112 includes a third groove 41121. One end of the third groove 41121 is disposed on the tooth portion of the first stator lamination 411, and the other end extends to the yoke portion of the first stator lamination 411. The radial outer radius R5 of the third groove 41121 is greater than the radial inner radius R4 of the second groove 41112, i.e., R5 > R4. Thus, when two adjacent first stator laminations 411 are staggered along the circumferential direction, the second groove 41112 of one second stator lamination 412 overlaps radially with the third groove 41121 of the other second stator lamination 412, and the two are connected.

[0180] In some embodiments of this application, referring to Figures 4-5, the first inner oil guide groove 4112 further includes a fourth sub-groove 41122, which satisfies at least one of the following: the fourth sub-groove 41122 is disposed on the tooth portion of the first stator lamination 411, and the fourth sub-groove 41122 is located between two adjacent teeth portions.

[0181] In other words, the fourth groove 41122 can be provided only on the teeth of the first stator lamination 411, or it can be located only between two adjacent teeth. Alternatively, the first inner oil guide groove 4112 can include multiple fourth grooves 41122, with a portion of the multiple fourth grooves 41122 provided on the teeth of the first stator lamination 411, and another portion of the multiple fourth grooves 41122 located between two adjacent teeth.

[0182] At least one of the third groove 41121 and the fourth groove 41122 is adapted to be axially connected to the second inner oil guide groove 4122 to form a second axial flow path 43112. For example, the third groove 41121 can be axially connected to the second inner oil guide groove 4122, the fourth groove 41122 can be axially connected to the second inner oil guide groove 4122, or both the third groove 41121 and the fourth groove 41122 can be axially connected to the second inner oil guide groove 4122.

[0183] For example, the first inner oil guide groove 4112 includes a plurality of third sub-grooves 41121, which are evenly distributed along the circumferential direction.

[0184] For example, the first inner oil guide groove 4112 includes a plurality of fourth sub-grooves 41122, which are evenly distributed along the circumferential direction. The third sub-grooves 41121 and the fourth sub-grooves 41122 are arranged alternately in the circumferential direction.

[0185] For the motor 10 shown in Figures 1-3, the radial stator core 41 in the motor 10 has two types of laminations. The core section composed of the first stator laminations 411 is located in the middle. The first stator laminations 411 have a first outer oil guide groove 4111 and a first inner oil guide groove 4112. The first outer oil guide groove 4111 is connected to the outer circle of the radial stator core 41, and the first inner oil guide groove 4112 is connected to the teeth of the radial stator core 41. At least some of the first stator laminations 411 are rotated by a certain angle to realize the connection between the first outer oil guide groove 4111 and the first inner oil guide groove 4112 of different first stator laminations 411 to form a flow channel.

[0186] The second stator lamination 412 has a second outer oil guide groove 4121 and a second inner oil guide groove 4122. The second outer oil guide groove 4121 is evenly distributed along the outer circumference of the radial stator core 41, and the second inner oil guide groove 4122 is located at least in the tooth portion of the radial stator core 41 and is evenly distributed along the circumference. The second outer oil guide groove 4121 and the second inner oil guide groove 4122 of the core formed by the second stator lamination 412 respectively form axial flow channels.

[0187] The outer casing 1 has N (N≥1, and N is a positive integer) medium inlets 15 circumferentially distributed at the axial center. Cooling oil enters the motor 10 through the medium inlets 15 and splits into two paths. One path enters the radial stator 4 from the first outer oil guide groove 4111 of the first stator lamination 411, then enters the teeth of the radial stator core 41 via the first inner oil guide groove 4112, and then cools the teeth of the radial stator core 41 through the second inner oil guide groove 4122 of the second stator lamination 412. The sprayed cooling oil then cools the axial stator winding 312. The other path enters the first outer oil guide groove 4111 of the first stator lamination 411 and flows axially into the second outer oil guide groove 4121 of the second stator lamination 412, cooling the yoke of the radial stator core 41. The sprayed cooling oil then cools the ends of the radial stator winding 42.

[0188] In some embodiments of this application, referring to Figures 9-11, the outer edge of the first stator lamination 411 is recessed radially inward to form a first oil guide groove 4113. The second stator lamination 412 has a second oil guide groove 4123, which is separated from the edge of the second stator lamination 412. The first oil guide groove 4113 and the second oil guide groove 4123 are connected. That is, the stator flow path 43 is an axial flow path. The cooling oil enters through the medium inlet 15 of the outer casing 1, passes through the yoke of the radial stator core 41 and the end oil guide ring 5, and finally cools the end of the radial stator winding 42.

[0189] The motor 10 shown in Figures 9-11 differs from the motor 10 shown in Figures 1-8 only in the structure of the radial stator 4 and the stator flow path 43. Other structures (such as rotor 2, housing 1, magnet adjustment assembly 3, etc.) are the same.

[0190] Referring to Figures 4-5 and 10-11, a first stator slot 4114 is formed on the first stator lamination 411, and the first stator slot 4114 extends through the first stator lamination 411 along the thickness direction. A second stator slot 4124 is formed on the second stator lamination 412, and the second stator slot 4124 extends through the second stator lamination 412 along the thickness direction. The first stator slot 4114 and the second stator slot 4124 are connected in the axial direction of the radial stator 4, so that the radial stator winding 42 is wound around the first stator slot 4114 and the second stator slot 4124.

[0191] In some embodiments of this application, referring to Figures 1 and 9, the rotor 2 includes a plurality of rotor laminations 21 and at least one rotor magnetic block 22. The plurality of rotor laminations 21 are stacked axially, and the rotor magnetic block 22 passes through the plurality of rotor laminations 21 axially.

[0192] For example, at least one rotor magnetic block 22 includes a plurality of rotor magnetic blocks 22, which are uniformly arranged around the axis of the rotor 2.

[0193] For example, at least one rotor magnetic block 22 includes a rotor magnetic block 22.

[0194] Both the axial stator core 311 and the rotor magnetic guide block 22 are made of magnetically conductive materials. The rotor magnetic guide block 22 has good magnetic permeability in both the axial and radial directions, while the axial direction of the axial stator 31 is a direction with high magnetic permeability. A portion of the magnetic field of the permanent magnet 23 of the rotor 2 forms a loop with the axial stator 31 through the rotor magnetic guide block 22. By adjusting the axial position of the axial stator 31 and the rotor 2, the air gap magnetic field can be effectively adjusted.

[0195] For example, the rotor lamination 21 is made of soft magnetic material. Commonly used soft magnetic materials include silicon steel sheets, amorphous and nanocrystalline alloys, iron-cobalt materials, stainless steel, and other magnetically conductive materials. The rotor lamination 21 may be designed with auxiliary slots, uneven air gaps, skewed poles, etc., to suppress magnetic field harmonics, torque pulsation, and NVH (Noise, Vibration, Harshness).

[0196] In some embodiments of this application, referring to Figures 1 and 9, in a plane projection perpendicular to the axial direction of the rotor 2, the rotor magnetic guide block 22 and the magnetic adjustment assembly 3 at least partially overlap. In other words, the magnetic adjustment assembly 3 is at least partially located along the axial direction of the rotor magnetic guide block 22. Thus, when the magnetic adjustment assembly 3 moves closer to or further away from the rotor 2 along the axial direction of the rotor 2, it can adjust the magnetic flux through the rotor magnetic guide block 22, thereby changing the magnitude of the magnetic field.

[0197] In some embodiments of this application, referring to Figures 1 and 9, the motor 10 further includes: a rotating shaft 7 and a rotor magnetic shielding plate 6. The rotating shaft 7 is rotatably mounted on the housing 1, and the rotor 2 is mounted on the rotating shaft 7. The rotor magnetic shielding plate 6 is disposed at both ends of the rotor 2 along the axial direction, and the rotor magnetic shielding plate 6 is fixed to the rotating shaft 7. The rotor magnetic guide block 22 passes through the rotor magnetic shielding plate 6 along the axial direction.

[0198] In some embodiments of this application, referring to Figures 1, 6-7, and 9, a magnetic block groove 212 is formed on the rotor lamination 21, extending through the thickness of the rotor lamination 21. A rotor magnetic block 22 passes through the magnetic block groove 212 axially. The rotor magnetic block 22 is either inserted into or integrally formed with the rotor lamination 21. The magnetic field between the rotor magnetic block 22 and the axial stator 31 is relatively strong. A rotor shaft hole 211 is also formed on the rotor lamination 21, extending through the thickness of the rotor lamination 21. The rotating shaft 7 passes through the rotor shaft hole 211 axially. Therefore, the rotor lamination 21 is less likely to detach radially from the rotating shaft 7, which helps to better secure the rotor lamination 21 to the rotating shaft 7. Of course, in other embodiments, the rotor shaft hole 211 can also be a blind hole.

[0199] In some embodiments of this application, referring to Figures 6-7, a magnet slot 213 is also provided on the rotor lamination 21, extending through the rotor lamination 21 along its thickness direction. A permanent magnet 23 (also called a magnet) is installed in the magnet slot 213. The permanent magnet 23 can be a commonly used permanent magnet material such as ferrite, neodymium iron boron, or samarium cobalt.

[0200] The rotor lamination 21 has multiple magnet slots 213, which can be arranged in various ways. The multiple magnet slots 213 can be square or arc-shaped. The magnet combination of a single magnetic pole can be in the form of a straight line, single "V", double "V", "straight line plus V", "U", "W", "V plus U", etc., in single layer, two layers, or more than two layers. Of course, in some embodiments, the magnet slots 213 can also be blind slots.

[0201] Referring to Figures 1 and 8-9, the rotor magnetic shielding plate 6 has a through hole 61 extending along its thickness direction. The rotor magnetic guide block 22 passes through the through hole 61 axially. This allows the rotor magnetic shielding plate 6 to avoid the rotor magnetic guide block 22 axially, resulting in a stronger magnetic field between the rotor magnetic guide block 22 and the axial stator 31. The rotor magnetic shielding plate 6 also has a shaft hole 62 extending along its thickness direction. The rotating shaft 7 passes through the shaft hole 62 axially. This prevents the rotor magnetic shielding plate 6 from detaching radially from the rotating shaft 7, ensuring better fixation of the rotor magnetic shielding plate 6 to the rotating shaft 7. Of course, in some embodiments, the through hole 61 can also be a blind hole.

[0202] According to some embodiments of this application, the motor 10 is a variable flux permanent magnet motor 10, which is magnetically adjusted by a magnetic adjustment assembly 3 located at the axial end of the rotor 2 and a rotor magnetic block 22 of the rotor 2.

[0203] According to some embodiments of this application, the motor 10 includes a rotor 2, a radial stator 4, a rotor magnetic block 22, and an axial stator 31 located at at least one end of the rotor 2 along its axial direction. The rotor 2 and the radial stator 4 form a main magnetic circuit, and the rotor magnetic block 22 and the axial stator 31 form an auxiliary magnetic adjustment circuit.

[0204] In some embodiments of this application, the motor 10 further includes an axial displacement sensor, which is used to detect the axial distance between the magnetizing assembly 3 and the rotor 2, thereby achieving closed-loop precise control of the magnetizing position.

[0205] In some embodiments of this application, referring to Figures 1-3 and Figure 9, the outer casing 1 includes a housing 17 and an end cap 16. The end cap 16 is mounted on the housing 17. One end of the rotating shaft 7 is supported on the end cap 16 by a first bearing 81, and the other end of the rotating shaft 7 is supported on the housing 17 by a second bearing 82. This reduces wear between the rotating shaft 7 and the housing 1, making the rotation of the rotating shaft 7 more stable and smooth. The moving cavity 11, the first inlet 13, and the second inlet 14 are all located on the end cap 16, and the medium inlet 15 is located on the housing 17.

[0206] For example, the first bearing 81 can be a deep groove ball bearing or a cylindrical roller bearing.

[0207] For example, the second bearing 82 can be a deep groove ball bearing or a cylindrical roller bearing.

[0208] For example, the end cap 16 and the housing 17 can be connected and fixed using fasteners such as bolts and rivets, or they can be fixed by gluing or welding.

[0209] According to some embodiments of this application, the motor 10 includes a housing 1, a radial stator 4 (radial stator core 41, radial stator winding 42), a rotor 2 (rotor core, rotor magnetic block 22, permanent magnet 23), a magnetic adjustment assembly 3, a rotating shaft 7, a rotor magnetic shielding plate 6, and an end oil guide ring 5.

[0210] The magnetic adjustment assembly 3 includes an axial stator 31 (axial stator core 311, axial stator winding 312) and a magnetic adjustment slider 32 (fitting part 321, connecting part 322). The axial stator 31 is fixedly connected to the end of the magnetic adjustment slider 32 near the rotor 2. The outer shell 1 includes a housing 17 and an end cover 16. The end cover 16 is installed on the housing 17. The end cover 16 has a moving cavity 11, a first inlet 13 and a second inlet 14. The first inlet 13 and the second inlet 14 are both connected to the moving cavity 11. The magnetic adjustment slider 32 is movably disposed in the moving cavity 11 and separates the first inlet 13 and the second inlet 14.

[0211] The rotor core is formed by stacking several layers of rotor laminations 21 (thin sheets of soft magnetic material). The rotor laminations 21 have rotor shaft holes 211, magnet slots 213, and magnetic block slots 212. The rotor magnetic shielding plate 6 has axial magnetic shielding plate through holes 61, which are axially connected to the magnetic block slots 212. The rotor magnetic blocks 22 extend from the magnetic shielding plate through holes 61 and magnetic block slots 212.

[0212] The radial stator core 41 is formed by stacking a first stator lamination 411 and a second stator lamination 412, and has a stator flow path 43 inside. The housing 17 has a medium inlet 15 located in the middle section, which communicates with the oil inlet groove of the radial stator core 41 formed by stacking laminations. The medium inlet 15 of the housing 17, the first stator lamination group, the second stator lamination group, and the end guide oil ring 5 together form the stator cooling oil channel.

[0213] In some embodiments, the rotor core may not be constructed using lamination stacking, but rather as a single solid core. In this case, the rotor magnetic guide block 22 can also be integrated with the rotor core to form an integral molded part, thereby creating a rotor core component that conducts magnetic flux in each direction. This component can guide magnetic flux in the main magnetic circuit and provide a magnetic flux path for the auxiliary magnetic adjustment circuit. The structure, shape, and position of the rotor magnetic guide block 22 are not limited. For example, it can be located at the yoke of the rotor 2 or in the middle of the magnetic poles of the rotor 2. It can be a single magnetic guide block or a combination of multiple magnetic guide blocks.

[0214] In some embodiments of this application, referring to Figures 1 and 9, there is an air gap 9 between the radial stator 4 and the rotor 2. Therefore, the rotor 2 will not interfere with the radial stator 4 when it rotates, which can ensure that the rotor 2 can rotate smoothly.

[0215] According to some embodiments of this application, the motor 10 can achieve permanent magnet magnetic field adjustment function, combining the advantages of constant torque region and constant power region. While ensuring high torque density and power density, it effectively expands the constant power operation region and high efficiency region. By setting the magnetic adjustment component 3, additional magnetic adjustment degree of freedom is introduced, which helps to reduce the dependence on armature direct shaft weak magnetic current in the medium and high speed region, thereby helping to reduce the risk of irreversible demagnetization of the magnet.

[0216] According to some embodiments of this application, the purpose of adjusting the magnetic field of the motor 10 is to reduce the main magnetic field (the main magnetic field is the effective magnetic field provided by the rotor 2 magnet to the stator winding, also known as the main magnetic flux) during high-speed operation, reduce the negative impact of weak magnetic field, including copper loss and demagnetization risk caused by large current, or increase the main magnetic field during heavy-load operation, increase the permanent magnet flux linkage, and increase torque output.

[0217] Referring to FIG12, an electric drive system 90 according to some embodiments of the present application includes the motor 10 of the above embodiments.

[0218] According to some embodiments of the present application, the electric drive system 90 has a motor 10 that can adjust the axial distance between the magnetic adjustment component 3 and the rotor 2, so that the magnetic adjustment component 3 can move closer to or further away from the rotor 2 along the axial direction, thereby realizing the effective adjustment of the magnetic flux of the rotor 2, and thus the effective adjustment of the working magnetic field of the motor 10.

[0219] Referring to FIG13, a vehicle 100 according to some embodiments of the present application includes the electric drive system 90 of the above embodiments.

[0220] According to some embodiments of the present application, in a vehicle 100, the electric drive system 90 motor 10 can adjust the axial distance between the magnetic adjustment component 3 and the rotor 2, so that the magnetic adjustment component 3 can move closer to or further away from the rotor 2 along the axial direction, thereby achieving effective adjustment of the magnetic flux of the rotor 2, and thus achieving effective adjustment of the working magnetic field of the motor 10.

[0221] For example, the medium introduced into the moving cavity 11 through the first inlet 13 can push the magnetic adjustment component 3 to move closer to the rotor 2 along the axial direction, and the medium introduced into the moving cavity 11 through the second inlet 14 can push the magnetic adjustment component 3 to move away from the rotor 2 along the axial direction, thereby realizing the effective adjustment of the working magnetic field of the motor 10.

[0222] The internal flow path of the motor 10 can reuse the hydraulic system on the vehicle 100. For example, the first inlet 13, the second inlet 14, and the medium inlet 15 are all connected to the hydraulic system on the vehicle 100. By reusing the oil from the vehicle 100 or the electric drive system, there is no need to set up an additional power source, resulting in low cost and low loss, and it can be applied to all models with hydraulic systems.

[0223] The following describes in detail, with reference to the accompanying drawings, some embodiments of the present application, including a first stator lamination 411 (i.e., stator lamination), a radial stator core 41 (i.e., stator core 41) having the first stator lamination 411, a motor cooling assembly having the radial stator core 41, a motor 10 having the motor cooling assembly, an electric drive system 90 having the motor 10, and a vehicle 100 having the electric drive system 90.

[0224] Referring to FIG4, according to some embodiments of this application, a first stator lamination 411 is provided with a first outer oil guide groove 4111 (i.e., the first outer groove) and a first inner oil guide groove 4112 (i.e., the first inner groove). The first outer oil guide groove 4111 and the first inner oil guide groove 4112 are spaced apart. The first inner oil guide groove 4112 is located radially inside the first outer oil guide groove 4111, and the projections of the first inner oil guide groove 4112 and the first outer oil guide groove 4111 along their radial direction at least partially overlap. In other words, the first outer oil guide groove 4111 is at least partially located on the radial extension line of the first inner oil guide groove 4112. When two adjacent first stator laminations 411 are staggered along the circumferential direction, the first inner oil guide groove 4112 of one first stator lamination 411 overlaps radially with the first outer oil guide groove 4111 of the other first stator lamination 411, and the two are connected.

[0225] For example, the radial outer end radius of the first inner oil guide groove 4112 is greater than the radial inner end radius of the first outer oil guide groove 4111.

[0226] The first outer oil guide groove 4111 and the first inner oil guide groove 4112 form a first groove group. Both the first outer oil guide groove 4111 and the first inner oil guide groove 4112 penetrate the first stator lamination 411 along the thickness direction of the first stator lamination 411. The first stator lamination 411 is used to participate in the formation of the radial stator core 41. The first outer oil guide groove 4111 and the first inner oil guide groove 4112 are used to participate in the formation of the composite flow path 431 inside the radial stator core 41. The composite flow path 431 extends along the axial and radial directions of the first stator lamination 411.

[0227] Referring to Figure 1, the composite flow path 431 includes an axial flow path 4311 and a radial flow path 4312, which are connected. The first outer oil guide groove 4111 and the first inner oil guide groove 4112 are used to participate in forming the axial flow path 4311 and the radial flow path 4312.

[0228] According to some embodiments of this application, the first stator lamination 411 is provided with a first outer oil guide groove 4111 and a first inner oil guide groove 4112 spaced apart, which facilitates the introduction of cooling medium into the first outer oil guide groove 4111 and the first inner oil guide groove 4112 to cool the first stator lamination 411. At the same time, the first inner oil guide groove 4112 is located radially inside the first outer oil guide groove 4111, so that cooling can be achieved at different radial positions of the first stator lamination 411, resulting in good cooling effect.

[0229] In some embodiments of this application, a first outer oil guide groove 4111 is disposed on the yoke portion of the first stator lamination 411. The first outer oil guide groove 4111 is formed by a radial inward recess from the outer edge of the first stator lamination 4111, and is an open groove on the outside. At least a portion of the first inner oil guide groove 4112 has one end disposed on the tooth portion of the first stator lamination 4111, and the other end extends to the yoke portion of the first stator lamination 4111. Thus, the cooling medium in the first outer oil guide groove 4111 can cool the area near the outer edge of the first stator lamination 4111, and the cooling medium in the first inner oil guide groove 4112 can cool from the tooth portion of the first stator lamination 4111 to the yoke portion.

[0230] In some embodiments of this application, referring to FIG4, a first outer oil guide groove 4111 is disposed on the yoke of the first stator lamination 411. The first outer oil guide groove 4111 includes a first sub-groove 41111 and a second sub-groove 41112. The first sub-groove 41111 is formed by the outer edge of the first stator lamination 411 recessed radially inward. The first sub-groove 41111 is an open groove on the outside. The second sub-groove 41112 is separated from the outer edge of the first stator lamination 411. The second sub-groove 41112 is a closed groove on both the inner and outer sides. At least one end of the first inner oil guide groove 4112 is disposed on the tooth of the first stator lamination 411, and the other end extends to the yoke of the first stator lamination 411.

[0231] Thus, the cooling medium in the first groove 41111 can cool the area near the outer edge of the first stator lamination 411, the cooling medium in the second groove 41112 can cool the area separated from the outer edge of the first stator lamination 411, and the cooling medium in the first inner oil guide groove 4112 can cool from the teeth of the first stator lamination 411 to the yoke.

[0232] It should be noted that the yoke of a stator lamination refers to the structure between the bottom of the stator slot and the outer edge of the stator core. The stator slot is the location for the stator winding. The teeth of the stator lamination are used to separate the stator slots. The yoke and teeth of the stator lamination are common technical terms in the field of motors, and will not be explained in detail here.

[0233] In some embodiments, the first outer oil guide groove 4111 and the first inner oil guide groove 4112 satisfy at least one of the following: the projections of the first groove 41111 and the first inner oil guide groove 4112 along their radial direction at least partially overlap, so that when two adjacent first stator laminations 411 are staggered along the circumferential direction, the first groove 41111 of one first stator lamination 411 and the first inner oil guide groove 4112 of the other first stator lamination 411 are radially overlapped and connected. And, the projections of the second groove 41112 and the first inner oil guide groove 4112 along their radial direction at least partially overlap, so that when two adjacent first stator laminations 411 are staggered along the circumferential direction, the second groove 41112 of one first stator lamination 411 and the first inner oil guide groove 4112 of the other first stator lamination 411 are radially overlapped and connected.

[0234] For example, the first outer oil guide groove 4111 and the first inner oil guide groove 4112 satisfy at least one of the following: the radial inner end radius of the first groove 41111 is smaller than the radial outer end radius of the first inner oil guide groove 4112; and the radial inner end radius of the second groove 41112 is smaller than the radial outer end radius of the first inner oil guide groove 4112.

[0235] In some embodiments of this application, referring to FIG4, the first outer oil guide groove 4111 and the first inner oil guide groove 4112 satisfy at least one of the following: the radial inner end radius of the first groove 41111 is greater than the radial outer end radius of the first inner oil guide groove 4112, and the projections of the first groove 41111 and the first inner oil guide groove 4112 along their radial direction do not overlap; and the radial inner end radius of the second groove 41112 is smaller than the radial outer end radius of the first inner oil guide groove 4112, and the projections of the second groove 41112 and the first inner oil guide groove 4112 along their radial direction at least partially overlap. Thus, when two adjacent first stator laminations 411 are staggered along the circumferential direction, the second groove 41112 of one first stator lamination 411 overlaps radially with the first inner oil guide groove 4112 of the other first stator lamination 411, and the two are connected.

[0236] In the example of Figure 4, the radial inner radius R2 of the first groove 41111 is greater than the radial outer radius R5 of the first inner oil guide groove 4112, i.e., R2 > R5. The radial inner radius R4 of the second groove 41112 is less than the radial outer radius R5 of the first inner oil guide groove 4112, i.e., R4 < R5.

[0237] In some embodiments of this application, referring to FIG4, the first groove 41111 includes a first groove portion 41111a and a second groove portion 41111b. The second groove portion 41111b is connected to the first groove portion 41111a. The second groove portion 41111b extends radially inward. For example, the second groove portion 41111b extends radially inward more than the first groove portion 41111a. The projections of the first groove portion 41111a and the second groove 41112 along their radial directions at least partially overlap, and the projections of the second groove portion 41111b and the second groove 41112 along their radial directions at least partially overlap.

[0238] For example, the radial inner radius R1 of the first slot 41111a is greater than the radial outer radius R3 of the second slot 41112, and the radial inner radius R2 of the second slot 41111b is less than the radial outer radius R3 of the second slot 41112, i.e., R1 > R3, R2 < R3. Thus, when two adjacent first stator laminations 411 are arranged with staggered teeth along the circumferential direction, the second slot 41111b of one first stator lamination 411 overlaps radially with the second slot 41112 of the other first stator lamination 411, and the two are connected.

[0239] For example, at least a portion of the first inner oil guide groove 4112 can be arranged radially with the second groove portion 41111b along the first stator lamination 411, and the staggered angle when the teeth are staggered is equal to the central angle between the second groove portion 41111b and the second groove 41112.

[0240] For example, the first external oil guide groove 4111 includes a plurality of second sub-grooves 41112, which are evenly distributed along the circumferential direction.

[0241] For example, the first sub-slot 41111 includes a plurality of second sub-slots 41111b, which are evenly distributed along the circumferential direction. The second sub-slots 41111b and the second sub-slot 41112 are arranged alternately in the circumferential direction.

[0242] In some embodiments of this application, referring to FIG4, the first inner oil guide groove 4112 includes a third sub-groove 41121, one end of the third sub-groove 41121 is disposed at the tooth portion of the first stator lamination 411, and the other end extends to the yoke portion of the first stator lamination 411.

[0243] In some embodiments of this application, the third slot 41121 and the first external oil guide groove 4111 satisfy at least one of the following: the projections of the third slot 41121 and the first slot 41111 along their radial direction at least partially overlap, so that when two adjacent first stator laminations 411 are staggered along the circumferential direction, the third slot 41121 of one first stator lamination 411 overlaps radially with the first slot 41111 of the other first stator lamination 411, and the two are connected. And, the projections of the third slot 41121 and the second slot 41112 along their radial direction at least partially overlap, so that when two adjacent first stator laminations 411 are staggered along the circumferential direction, the third slot 41121 of one first stator lamination 411 overlaps radially with the second slot 41112 of the other first stator lamination 411, and the two are connected.

[0244] In other words, the third groove 41121 and the first outer oil guide groove 4111 satisfy at least one of the following: the radial outer end radius of the third groove 41121 is greater than the radial inner end radius of the first groove 41111, and the radial outer end radius of the third groove 41121 is greater than the radial inner end radius of the second groove 41112.

[0245] In the example of Figure 4, the radial outer radius R5 of the third slot 41121 is smaller than the radial inner radius R2 of the first slot 41111, i.e., R5 < R2. The radial outer radius R5 of the third slot 41121 is larger than the radial inner radius R4 of the second slot 41112, i.e., R5 > R4. Thus, when two adjacent first stator laminations 411 are staggered along the circumferential direction, the second slot 41112 of one second stator lamination 412 overlaps radially with the third slot 41121 of the other second stator lamination 412, and the two are connected.

[0246] In some embodiments of this application, referring to FIG4, the first inner oil guide groove 4112 further includes a fourth sub-groove 41122, the fourth sub-groove 41122 satisfying at least one of the following: the fourth sub-groove 41122 is disposed on the tooth portion of the first stator lamination 411; and the fourth sub-groove 41122 is located between two adjacent teeth portions.

[0247] In other words, the fourth groove 41122 can be provided only on the teeth of the first stator lamination 411, or it can be located only between two adjacent teeth. Alternatively, the first inner oil guide groove 4112 can include multiple fourth grooves 41122, with a portion of the multiple fourth grooves 41122 provided on the teeth of the first stator lamination 411, and another portion of the multiple fourth grooves 41122 located between two adjacent teeth.

[0248] For example, the first inner oil guide groove 4112 includes a plurality of third sub-grooves 41121, which are evenly distributed along the circumferential direction.

[0249] For example, the first inner oil guide groove 4112 includes a plurality of fourth sub-grooves 41122, which are evenly distributed along the circumferential direction. The third sub-grooves 41121 and the fourth sub-grooves 41122 are arranged alternately in the circumferential direction.

[0250] Referring to Figures 1 and 4, the radial stator core 41 according to some embodiments of this application includes a first stator lamination group (i.e., a first stator core), which includes the first stator laminations 411 described in the above embodiments. For example, the first stator lamination group includes one or more first stator laminations 411 stacked axially.

[0251] According to some embodiments of this application, the radial stator core 41 has a first stator lamination 411 provided with a first outer oil guide groove 4111 and a first inner oil guide groove 4112 spaced apart, which facilitates the introduction of cooling medium into the first outer oil guide groove 4111 and the first inner oil guide groove 4112 to cool the first stator lamination 411. Furthermore, the first inner oil guide groove 4112 is located radially inside the first outer oil guide groove 4111, so that cooling can be achieved at different radial positions of the first stator lamination 411, resulting in good cooling effect.

[0252] In some embodiments of this application, referring to Figures 1 and 4-5, the first stator lamination group includes a plurality of first stator laminations 411, with at least two adjacent first stator laminations 411 arranged in a staggered manner along the circumferential direction, such that the first outer oil guide groove 4111 and the first inner oil guide groove 4112 of different first stator laminations 411 are radially connected. For example, the first outer oil guide groove 4111 and the first inner oil guide groove 4112 of different first stator laminations 411 are radially connected to form a radial flow path 4312.

[0253] In some embodiments of this application, referring to Figures 1 and 4-5, the radial stator core 41 further includes a second stator lamination group (i.e., a second stator core), which is disposed at both axial ends of the first stator lamination group. In other words, the first stator lamination group is located in the middle, and both axial ends of the first stator lamination group have a second stator lamination group.

[0254] In some embodiments of this application, referring to Figures 1 and 4-5, the second stator lamination assembly is provided with a second inner oil guide groove 4122 (i.e., a second inner groove), which can be axially connected to the first inner oil guide groove 4112. For example, the first inner oil guide groove 4112 and the second inner oil guide groove 4122 are axially connected to form a partial axial flow path 4311.

[0255] For example, the second stator lamination group includes one or more second stator laminations 412 stacked axially.

[0256] In some embodiments of this application, referring to Figures 1 and 4-5, the second stator lamination group is further provided with a second outer oil guide groove 4121 (second outer groove). The second outer oil guide groove 4121 is located radially outside the second inner oil guide groove 4122. The second outer oil guide groove 4121 and the second inner oil guide groove 4122 form a second groove group. Both the second outer oil guide groove 4121 and the second inner oil guide groove 4122 penetrate the second stator lamination 412 along the thickness direction of the second stator lamination 412. The second outer oil guide groove 4121 can be axially connected to the first outer oil guide groove 4111. For example, the first outer oil guide groove 4111 and the second outer oil guide groove 4121 are axially connected to form a partial axial flow path 4311.

[0257] In some embodiments of this application, referring to Figures 1, 4-5, the first outer oil guide groove 4111 and the second outer oil guide groove 4121 are axially connected to form a first axial flow path 43111, the first inner oil guide groove 4112 and the second inner oil guide groove 4122 are axially connected to form a second axial flow path 43112, and the radial flow path 4312 connects the first axial flow path 43111 and the second axial flow path 43112.

[0258] At least two adjacent first stator laminations 411 are staggered along the circumferential direction so that the first slot 41111 and the second slot 41112 of different first stator laminations 411 are connected in the radial direction, and the second slot 41112 is connected in the radial direction to the first inner oil guide groove 4112 to form a radial flow path 4312. At least one of the first slot 41111 and the second slot 41112 is adapted to be connected in the axial direction to the second outer oil guide groove 4121.

[0259] In some embodiments of this application, referring to Figures 1 and 5, the second stator lamination group is formed by stacking a plurality of second stator laminations 412 along the axial direction.

[0260] The motor cooling assembly according to some embodiments of this application includes the radial stator core 41 of the above embodiments.

[0261] According to some embodiments of the present application, the motor cooling assembly has a first stator lamination 411 with a first outer oil guide groove 4111 and a first inner oil guide groove 4112 spaced apart, which facilitates the introduction of cooling medium into the first outer oil guide groove 4111 and the first inner oil guide groove 4112 to cool the first stator lamination 411. At the same time, the first inner oil guide groove 4112 is located radially inside the first outer oil guide groove 4111, so that the first stator lamination 411 can be cooled at different radial positions, resulting in good cooling effect.

[0262] In some embodiments of this application, referring to FIG1, a composite flow path 431 is formed in the radial stator core 41, extending axially and radially along the radial stator core 41. For example, the composite flow path 431 is formed in the first stator lamination group and the second stator lamination group. Thus, the medium in the stator flow path 431 can cool the first stator lamination group and the second stator lamination group, and the cooled first stator lamination group and the second stator lamination group can further cool the radial stator winding 42 (i.e., the stator winding) on ​​the radial stator core 41.

[0263] In some embodiments of this application, referring to FIG1, the composite flow path 431 includes at least one axial flow path 4311 and at least one radial flow path 4312, wherein the radial flow path 4312 is connected to the axial flow path 4311. Referring to FIG1, there are two axial flow paths 4311, namely a first axial flow path 43111 and a second axial flow path 43112. Both the second axial flow path 43112 and the first axial flow path 43111 extend along the axial direction of the radial stator 4. The second axial flow path 43112 is located radially inside the first axial flow path 43111, and the radial flow path 4312 is located between the first axial flow path 43111 and the second axial flow path 43112, and the radial flow path 4312 connects the first axial flow path 43111 and the second axial flow path 43112.

[0264] In some embodiments of this application, referring to Figures 1-3, the motor cooling assembly further includes a housing 1, with an installation cavity 12 inside the housing 1, a radial stator core 41 installed in the installation cavity 12, and a medium inlet 15 opened on the housing 1, with a composite flow path 431 communicating with the medium inlet 15.

[0265] In some embodiments of this application, referring to FIG1, a portion of the medium entering through the medium inlet 15 can first enter the first axial flow path 43111 and flow along the axial direction of the radial stator 4 within the first axial flow path 43111. Another portion of the medium entering can enter the radial flow path 4312 and flow along the radial direction of the radial stator 4 within the radial flow path 4312, and further enter the second axial flow path 43112 and flow along the axial direction of the radial stator 4 within the second axial flow path 43112.

[0266] In some embodiments of this application, referring to FIG1, the motor cooling assembly further includes a radial stator winding 42, which is wound around a radial stator core 41, which is sleeved on the radial outer side of the rotor 2. A composite flow path 431 is disposed on the radial stator core 41. The medium in the composite flow path 431 can cool the radial stator core 41, and the cooled radial stator core 41 can further cool the radial stator winding 42.

[0267] The radial stator winding 42 and the radial stator core 41 constitute the radial stator 4, which is installed within the mounting cavity 12 and nested with the rotor 2. For example, in the example shown in Figure 1, the radial stator 4 can be fitted radially outside the rotor 2; or, for example, the rotor 2 can be fitted radially outside the radial stator 4, in which case the medium flowing through the internal path of the radial stator 4 can enter through the inlet at the shaft end of the radial stator 4. When the rotor 2 rotates, the rotor 2 and the radial stator 4 move circumferentially relative to each other, generating a magnetic field.

[0268] The radial stator 4 has a stator flow path 43 inside, for example, the stator flow path 43 is a composite flow path 431, which is connected to the medium inlet 15 and extends along the axial and radial directions of the radial stator 4. Therefore, the radial stator 4 can be cooled in both the axial and radial directions, resulting in better cooling effect.

[0269] The medium inlet 15 connects the mounting cavity 12 to the outside of the outer casing 1. After the radial stator 4 is installed in the mounting cavity 12, the medium inlet 15 is connected to the composite flow path 431, allowing the medium to flow into the composite flow path 431 through the medium inlet 15. The medium in the composite flow path 431 can cool the radial stator 4. When the medium in the composite flow path 431 is lubricating oil, it can also lubricate the radial stator 4. For ease of description, this application uses the example of the medium in the composite flow path 431 being used to cool the radial stator 4 to illustrate the structure of the composite flow path 431.

[0270] According to some embodiments of the present application, the motor cooling assembly provides a composite flow path 431 inside the radial stator 4, allowing the medium to flow in both the axial and radial directions of the radial stator 4. This results in a better cooling effect on the radial stator 4, which in turn improves the cooling effect on the motor 10 and helps to extend the service life of the motor 10.

[0271] The medium entering through the medium inlet 15 can flow within the axial flow path 4311 and the radial flow path 4312.

[0272] In some embodiments, the inlet of the stator flow path 43 of the radial stator 4 may be located at the shaft end of the radial stator 4.

[0273] In some embodiments of this application, referring to Figures 1-3, the axial end of the radial stator core 41 is provided with an end oil guide ring 5. The end oil guide ring 5 has an oil spray hole, and the composite flow path 431 communicates with the oil spray hole. At least a portion of the oil spray hole is disposed opposite to the radial stator winding 42. The medium in the stator flow path 43 can be sprayed out from the oil spray hole, and the medium sprayed out from the oil spray hole can cool the radial stator winding 42, preventing the radial stator winding 42 from being damaged due to excessive temperature or causing other adverse consequences. The stator flow path 43 is supplied with oil through the medium inlet 15, and the oil flows through the stator flow path 43 and the end oil guide ring 5, ultimately cooling the end of the radial stator winding 42.

[0274] Referring to Figures 1-3, the motor 10 according to some embodiments of this application includes the motor cooling assembly described above.

[0275] Referring to Figures 1-3, the motor 10 also includes a rotor 2, which is rotatably mounted in the mounting cavity 12 inside the housing 1. The radial stator core 41 and the rotor 2 are arranged radially nested together.

[0276] In some embodiments of this application, referring to Figures 1-3, the motor 10 further includes an axial stator 31, which is disposed at at least one end of the rotor 2 in the axial direction, and the axial position of the axial stator 31 relative to the rotor 2 is adjustable, thereby adjusting the magnetic field between the axial stator 31 and the rotor 2.

[0277] In some embodiments of this application, referring to Figures 1-3, the medium ejected from the composite flow path 431 within the radial stator core 41 is adapted to spray onto the axial stator 31, thereby cooling the axial stator 31. For example, the outlet of the composite flow path 431 is at least positioned opposite to the axial stator 31. The axial stator 31 includes an axial stator core 311 and an axial stator winding 312 wound around the axial stator core 311. For example, the outlet of the second axial flow path 43112 is at least positioned opposite to the axial stator winding 312 of the axial stator 31.

[0278] As shown in Figure 1, the upper outlet of the second axial flow path 43112 is positioned opposite to the axial stator winding 312 of the axial stator 31. In this way, the medium ejected from the upper outlet of the second axial flow path 43112 can cool the axial stator winding 312 of the axial stator 31, preventing the axial stator 31 from overheating and being damaged. Thus, the cooling effect of the magnetizing assembly 3 (e.g., the axial stator 31) is good, and the cooling oil of the motor 10 is used to cool the axial stator 31, improving the magnetizing efficiency.

[0279] In some embodiments of this application, referring to Figures 1-3, the motor cooling assembly includes a housing 1, the housing 1 having a movable cavity 11 and a mounting cavity 12 inside. The motor 10 also includes a magnetic adjustment assembly 3, which includes a magnetic adjustment slider 32 and the aforementioned axial stator 31. The axial stator 31 is fixedly connected to the magnetic adjustment slider 32. The magnetic adjustment slider 32 is movably disposed in the movable cavity 11 at the corresponding end of the rotor 2. The amount of medium in the movable cavity 11 is adjustable to change the axial distance between the magnetic adjustment slider 32 and the rotor 2.

[0280] The rotor 2 is rotatably mounted in the mounting cavity 12, and the movable cavity 11 is located at at least one end of the rotor 2 in the axial direction. In the examples of Figures 1-3, the movable cavity 11 is only located at the upper axial end of the rotor 2. In some embodiments, the movable cavity 11 may also be located at the lower axial end of the rotor 2, or the movable cavity 11 may be located at both the upper and lower axial ends of the rotor 2.

[0281] In some embodiments of this application, referring to Figures 1-3, the outer casing 1 has a first inlet 13 and a second inlet 14, both of which are connected to the moving cavity 11. The moving cavity 11 can communicate with the outside of the outer casing 1 through the first inlet 13, and the moving cavity 11 can also communicate with the outside of the outer casing 1 through the second inlet 14. The magnetic adjustment slider 32 separates the first inlet 13 and the second inlet 14. The medium introduced into the moving cavity 11 through the first inlet 13 is suitable for pushing the magnetic adjustment slider 32 axially closer to the rotor 2, and the medium introduced into the moving cavity 11 through the second inlet 14 is suitable for pushing the magnetic adjustment slider 32 axially away from the rotor 2.

[0282] The magnetic adjustment component 3 is a component that adjusts the air gap magnetic field of the motor 10 by changing the leakage flux of the permanent magnet. The magnetic adjustment component 3 is movably disposed in the moving cavity 11 at the corresponding end of the rotor 2. The magnetic adjustment component 3 separates the first inlet 13 and the second inlet 14. For example, the first inlet 13 and the second inlet 14 can be located at opposite ends of the magnetic adjustment component 3.

[0283] The medium is introduced into the moving cavity 11 through the first inlet 13 to push the magnetic adjustment component 3 axially closer to the rotor 2, and the medium is introduced into the moving cavity 11 through the second inlet 14 to push the magnetic adjustment component 3 axially away from the rotor 2, thereby achieving effective adjustment of the working magnetic field of the motor 10. In other words, the axial distance between the magnetic adjustment component 3 and the rotor 2 can be adjusted by introducing a medium through either the first inlet 13 or the second inlet 14, thus changing the magnitude of the magnetic field between them. The different positions of the first inlet 13 and the second inlet 14 result in different positions for the medium introduced into the moving cavity 11.

[0284] In some embodiments of this application, referring to Figures 1-3, the magnetic adjustment assembly 3 includes an axial stator 31 and a magnetic adjustment slider 32, with the axial stator 31 fixedly connected to the magnetic adjustment slider 32. The magnetic adjustment slider 32 is movably disposed in the moving cavity 11 at the corresponding end of the rotor 2. The amount of medium in the moving cavity 11 is adjustable to change the axial distance between the magnetic adjustment slider 32 and the rotor 2.

[0285] The magnetic adjustment slider 32 can separate the first inlet 13 and the second inlet 14. For example, the first inlet 13 and the second inlet 14 can be located at opposite ends of the magnetic adjustment slider 32. The axial stator 31 includes an axial stator core 311 and an axial stator winding 312. The axial stator core 311 is fixedly connected to the magnetic adjustment slider 32, and the axial stator winding 312 is wound around the axial stator core 311.

[0286] In addition, the axial stator winding 312 of the axial stator 31 can effectively utilize the wasted space at the end of the rotor 2, which is beneficial to improving the space utilization of the motor 10, providing additional power and torque, and increasing the power density and torque density of the motor 10.

[0287] For example, the fixed connection between the axial stator core 311 and the magnetic adjustment slider 32 can be achieved by one or more combinations of methods such as adhesive fixing, screw fixing, tight fit fixing, snap fixing, and welding fixing.

[0288] For example, when the motor 10 does not adjust the magnetic flux, the axial stator 31 is far away from the rotor 2. When the magnetic flux needs to be adjusted, the magnetic adjustment slider 32 drives the axial stator 31 to move closer to the rotor 2.

[0289] For example, the axial stator core 311 is made of magnetically conductive material.

[0290] For example, the axial stator core 311 can be made of wound steel sheets, thereby reducing iron loss and improving the efficiency of the motor 10.

[0291] In some embodiments of this application, referring to Figures 1-3, the axial stator core 311 is fixedly connected to the end of the magnetic adjustment slider 32 closest to the rotor 2. In this way, the axial stator core 311 is closer to the rotor 2 than the magnetic adjustment slider 32, and there is no magnetic adjustment slider 32 obstructing the connection between the axial stator core 311 and the rotor 2. This makes it easier to generate a magnetic field between the axial stator core 311 and the rotor 2, and allows for more sensitive adjustment of the magnetic field between the axial stator 31 and the rotor 2 when the axial position of the axial stator 31 changes.

[0292] In some embodiments of this application, referring to Figures 1-3, the magnetic slider 32 includes a mating portion 321 and a connecting portion 322. The first inlet 13 and the second inlet 14 can be located at opposite ends of the mating portion 321; in other words, the mating portion 321 can be located between the first inlet 13 and the second inlet 14. The mating portion 321 fits against the cavity wall of the moving cavity 11. One end of the connecting portion 322 is fixedly connected to the mating portion 321, and the other end of the connecting portion 322 is fixedly connected to the axial stator core 311. The mating portion 321 slides against the cavity wall of the moving cavity 11.

[0293] The mating part 321 divides the moving cavity 11 into two parts: a first sub-cavity located above the moving cavity 11 and a second sub-cavity located below the moving cavity 11. The first sub-cavity is connected to the medium source through the first inlet 13, and the second sub-cavity is connected to the medium source through the second inlet 14.

[0294] Sufficient medium is introduced into the first cavity through the first inlet 13, which pushes the mating part 321 to slide downwards; sufficient medium is introduced into the second cavity through the second inlet 14, which pushes the mating part 321 to slide upwards. As the mating part 321 moves, the volumes of the first and second cavities change accordingly. For example, when the mating part 321 moves downwards, the volume of the first cavity increases and the volume of the second cavity decreases; when the mating part 321 moves upwards, the volume of the first cavity decreases and the volume of the second cavity increases.

[0295] When the first inlet 13 and the second inlet 14 are connected to the hydraulic system, the first and second sub-cavities can serve as hydraulic flow channels.

[0296] For example, there are various ways to fix the connection between the connecting part 322 and the axial stator 31. For example, the connecting part 322 and the axial stator 31 can be fixedly connected by threads, by tight fit, or by other methods such as adhesive.

[0297] According to some embodiments of this application, the motor 10 is a variable flux permanent magnet motor 10, which is magnetically adjusted by a magnetic adjustment assembly 3 located at the axial end of the rotor 2 and a rotor magnetic block 22 of the rotor 2.

[0298] According to some embodiments of this application, the motor 10 includes a rotor 2, a radial stator 4, a rotor magnetic block 22, and an axial stator 31 located at at least one end of the rotor 2 along its axial direction. The rotor 2 and the radial stator 4 form a main magnetic circuit, and the rotor magnetic block 22 and the axial stator 31 form an auxiliary magnetic adjustment circuit.

[0299] In some embodiments of this application, the motor 10 further includes an axial displacement sensor, which is used to detect the axial distance between the magnetizing assembly 3 and the rotor 2, thereby achieving closed-loop precise control of the magnetizing position.

[0300] In some embodiments of this application, referring to Figures 1-3, the outer casing 1 includes a housing 17 and an end cap 16. The end cap 16 is mounted on the housing 17. One end of the rotating shaft 7 is supported on the end cap 16 by a first bearing 81, and the other end of the rotating shaft 7 is supported on the housing 17 by a second bearing 82. This reduces wear between the rotating shaft 7 and the housing 1, making the rotation of the rotating shaft 7 more stable and smooth. The moving cavity 11, the first inlet 13, and the second inlet 14 are all located on the end cap 16, and the medium inlet 15 is located on the housing 17.

[0301] For example, the first bearing 81 can be a deep groove ball bearing or a cylindrical roller bearing.

[0302] For example, the second bearing 82 can be a deep groove ball bearing or a cylindrical roller bearing.

[0303] For example, the end cap 17 and the housing 16 can be connected and fixed using fasteners such as bolts and rivets, or they can be fixed by gluing or welding.

[0304] According to some embodiments of this application, the motor 10 includes a housing 1, a radial stator 4 (radial stator core 41, radial stator winding 42), a rotor 2 (rotor core, rotor magnetic block 22, permanent magnet 23), a magnetic adjustment assembly 3, a rotating shaft 7, a rotor magnetic shielding plate 6, and an end oil guide ring 5.

[0305] The magnetic adjustment assembly 3 includes an axial stator 31 (axial stator core 311, axial stator winding 312) and a magnetic adjustment slider 32 (fitting part 321, connecting part 322). The axial stator 31 is fixedly connected to the end of the magnetic adjustment slider 32 near the rotor 2. The outer shell 1 includes a housing 17 and an end cover 16. The end cover 16 is installed on the housing 17. The end cover 16 has a moving cavity 11, a first inlet 13 and a second inlet 14. The first inlet 13 and the second inlet 14 are both connected to the moving cavity 11. The magnetic adjustment slider 32 is movably disposed in the moving cavity 11 and separates the first inlet 13 and the second inlet 14.

[0306] The rotor core is formed by stacking several layers of rotor laminations 21 (thin sheets of soft magnetic material). The rotor laminations 21 have rotor shaft holes 211, magnetic steel slots 213, and magnetic block slots 212.

[0307] The rotor magnetic shielding plate 6 has an axial magnetic shielding plate through hole 61, which is axially connected to the magnetic guide block groove 212. The rotor magnetic guide block 22 extends out from the magnetic shielding plate through hole 61 and the magnetic guide block groove 212. The radial stator core 41 is formed by stacking the first stator lamination 411 and the second stator lamination 412. The radial stator core 41 has a stator flow path 43 inside.

[0308] The housing 17 has a medium inlet 15 located in the middle section, which is connected to the oil inlet groove of the radial stator core 41 formed by lamination. The medium inlet 15, the first stator lamination group, the second stator lamination group, and the end guide oil ring 5 of the housing 17 together form the stator cooling oil channel.

[0309] In some embodiments, the rotor core may not be constructed using lamination stacking, but rather as a single solid core. In this case, the rotor magnetic guide block 22 can also be integrated with the rotor core to form an integral molded part, thereby creating a rotor core component that conducts magnetic flux in each direction. This component can guide magnetic flux in the main magnetic circuit and provide a magnetic flux path for the auxiliary magnetic adjustment circuit. The structure, shape, and position of the rotor magnetic guide block 22 are not limited. For example, it can be located at the yoke of the rotor 2 or in the middle of the magnetic poles of the rotor 2. It can be a single magnetic guide block or a combination of multiple magnetic guide blocks.

[0310] In some embodiments of this application, referring to FIG1, there is an air gap 9 between the radial stator 4 and the rotor 2, so that the rotor 2 will not interfere with the radial stator 4 when rotating, thus ensuring that the rotor 2 can rotate smoothly.

[0311] According to some embodiments of this application, the motor 10 can achieve permanent magnet magnetic field adjustment function, combining the advantages of constant torque region and constant power region. While ensuring high torque density and power density, it effectively expands the constant power operation region and high efficiency region. By setting the magnetic adjustment component 3, additional magnetic adjustment degree of freedom is introduced, which helps to reduce the dependence on armature direct shaft weak magnetic current in the medium and high speed region, thereby helping to reduce the risk of irreversible demagnetization of the magnet.

[0312] According to some embodiments of this application, the purpose of adjusting the magnetic field of the motor 10 is to reduce the main magnetic field (the main magnetic field is the effective magnetic field provided by the rotor 2 magnet to the radial stator winding, also known as the main magnetic flux) during high-speed operation, reduce the negative impact of weak magnetic field, including copper loss and demagnetization risk caused by large current, or increase the main magnetic field during heavy-load operation, increase permanent magnet flux linkage, and increase torque output.

[0313] Referring to FIG12, an electric drive system 90 according to some embodiments of the present application includes the motor 10 of the above embodiments.

[0314] According to some embodiments of the present application, the electric drive system 90 has a motor 10 with a compound flow path 431 provided inside the radial stator 4, where the medium can flow in both the axial and radial directions of the radial stator 4, resulting in better cooling of the radial stator 4 and consequently better cooling of the motor 10, which is beneficial to improving the service life of the motor 10.

[0315] Referring to FIG13, a vehicle 100 according to some embodiments of the present application includes the electric drive system 90 of the above embodiments.

[0316] According to some embodiments of the vehicle 100 of this application, the motor 10 of its electric drive system 90 has a composite flow path 431 provided inside the radial stator 4, allowing the medium to flow in both the axial and radial directions of the radial stator 4. This results in better cooling of the radial stator 4, and consequently, better cooling of the motor 10, which is beneficial for extending the service life of the motor 10. The flow path inside the motor 10 can reuse the hydraulic system on the vehicle 100; for example, the first inlet 13, the second inlet 14, and the medium inlet 15 are all connected to the hydraulic system on the vehicle 100. By reusing the hydraulic fluid of the vehicle 100 or the electric drive system, there is no need to set up an additional power source. The system operating point can be optimized in real time according to the working conditions, improving system efficiency. Furthermore, it is low-cost and has low losses, making it applicable to all hydraulic system vehicle models.

[0317] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0318] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0319] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0320] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A magnetic adjustment component (3) is adapted to be disposed at at least one end of a rotor (2) in the axial direction; the position of the magnetic adjustment component (3) in the axial direction of the rotor (2) is adjustable to adjust the magnetic flux through the rotor (2).

2. The magnetizing assembly (3) according to claim 1, comprising: A magnetic adjustment slider (32) is capable of moving axially in the rotor (2); as well as An axial stator (31) is connected to the magnetic adjustment slider (32).

3. The magnetizing assembly (3) according to claim 2, wherein, The axial stator (31) includes: An axial stator core (311) is connected to the magnetic adjustment slider (32); and An axial stator winding (312) is wound around the axial stator core (311).

4. The magnetizing assembly (3) according to claim 3, wherein, The axial stator core (311) is connected to the end of the magnetic adjustment slider (32) near the rotor (2).

5. The magnetizing assembly (3) according to any one of claims 1-4, satisfying at least one of the following: The magnetizing assembly (3) is capable of moving circumferentially along the rotor (2); and The magnetic adjustment component (3) is capable of moving radially along the rotor (2).

6. The magnetizing assembly (3) according to any one of claims 2-5, wherein, The magnetic adjustment slider (32) is movably disposed in the moving cavity (11), which is connected to a first inlet (13) and a second inlet (14); the magnetic adjustment slider (32) separates the first inlet (13) and the second inlet (14); The medium is introduced into the moving cavity (11) through the first inlet (13), which is suitable for pushing the magnetic adjustment slider (32) to move axially closer to the rotor (2); A medium is introduced into the moving cavity (11) through the second inlet (14), which is suitable for pushing the magnetic adjustment slider (32) away from the rotor (2) axially.

7. The magnetizing assembly (3) according to claim 6, wherein, The magnetic adjustment slider (32) includes a mating part (321), which fits against the cavity wall of the moving cavity (11) and can move along the cavity wall of the moving cavity (11).

8. The magnetizing assembly (3) according to claim 7, wherein, The magnetic adjustment slider (32) also includes a connecting part (322), the first end of which is connected to the mating part (321), and the second end of which is connected to the axial stator (31).

9. An electric motor (10), comprising: Rotor (2); And the magnetizing assembly (3) or motor cooling assembly according to any one of claims 1-8, wherein the magnetizing assembly (3) is movably disposed at at least one end of the rotor (2) in the axial direction.

10. The motor (10) according to claim 9, comprising the magnetizing assembly (3) and a housing (1), wherein the housing (1) has a movable cavity (11) inside, the movable cavity (11) being located at at least one end of the rotor (2) in the axial direction, the magnetizing assembly (3) being movably disposed in the movable cavity (11) at the corresponding end of the rotor (2); the amount of medium in the movable cavity (11) is adjustable to change the distance between the magnetizing assembly (3) and the rotor (2) in the axial direction of the rotor (2).

11. The motor (10) according to claim 10, wherein, The outer shell (1) is provided with a first inlet (13) and a second inlet (14), both of which are connected to the moving cavity (11); The magnetic adjustment component (3) separates the first inlet (13) and the second inlet (14), and introduces a medium into the moving cavity (11) through the first inlet (13), which is suitable for pushing the magnetic adjustment component (3) to move closer to the rotor (2) along the axial direction; A medium is introduced into the moving cavity (11) through the second inlet (14), which is suitable for pushing the magnetizing assembly (3) away from the rotor (2) axially.

12. The motor (10) according to claim 10 or 11, wherein, The housing (1) also has a mounting cavity (12) inside, and the rotor (2) is rotatably mounted in the mounting cavity (12).

13. The motor (10) according to any one of claims 9-12, wherein, The rotor (2) includes: Multiple rotor laminations (21) are stacked along the axial direction of the rotor (2); and At least one rotor magnetic block (22) is provided with the plurality of rotor laminations (21) passing through it along the axial direction of the rotor (2).

14. The motor (10) according to claim 13, wherein, In a plane projection perpendicular to the axial direction of the rotor (2), at least one rotor magnetic block (22) overlaps at least partially with the magnetic adjustment assembly (3).

15. The motor (10) according to claim 13 or 14, further comprising: A rotating shaft (7), the rotating shaft (7) being rotatable, the rotor (2) being mounted on the rotating shaft (7); and The rotor magnetic shielding plate (6) is disposed at both ends of the rotor (2) along the axial direction and is connected to the rotating shaft (7); the rotor magnetic guide block (22) passes through the rotor magnetic shielding plate (6) along the axial direction of the rotor (2).

16. The motor (10) according to any one of claims 9-12 further includes an axial displacement sensor configured to detect the axial distance between the magnetizing assembly (3) and the rotor (2).

17. The motor (10) according to any one of claims 12-16 further includes a radial stator (4) installed in the mounting cavity (12) and nested with the rotor (2).

18. The motor (10) according to claim 17, wherein, The radial stator (4) includes a radial stator core (41) and a radial stator winding (42), wherein the radial stator winding (42) is wound around the radial stator core (41); The motor (10) has a medium inlet (15) on its outer casing (1). The radial stator core (41) is sleeved on the radial outer side of the rotor (2). The radial stator core (41) has a stator flow path (43), which is connected to the medium inlet (15) and extends at least along the axial direction of the radial stator core (41).

19. The motor (10) according to claim 18, wherein, The radial stator core (41) has an end oil guide ring (5) at its end, the end oil guide ring (5) has an oil injection hole, the stator flow path (43) is connected to the oil injection hole, and at least a part of the oil injection hole is arranged opposite to the radial stator winding (42).

20. The motor (10) according to claim 19, wherein, The radial stator winding (42) protrudes axially from the radial stator core (41), and the oil injection hole includes a radial oil injection hole, which is arranged opposite to the radial stator winding (42) in the radial direction of the radial stator (4).

21. The motor (10) according to any one of claims 18-20, wherein, The radial stator core (41) includes a first stator lamination group and a second stator lamination group located at both ends of the first stator lamination group in the axial direction. The first stator lamination group includes one or more first stator laminations (411) stacked axially, and the second stator lamination group includes one or more second stator laminations (412) stacked axially, and the stator flow path (43) is formed in the first stator lamination group and the second stator lamination group.

22. The motor (10) according to claim 21, wherein, The stator flow path (43) includes a composite flow path (431) that extends along the axial and radial directions of the radial stator (4).

23. The motor (10) according to claim 22, wherein, One of the one or more first stator laminations (411) is provided with a first outer oil guide groove (4111) and a first inner oil guide groove (4112), wherein the first inner oil guide groove (4112) is located radially inside the first outer oil guide groove (4111); The second stator lamination (412) is provided with a second inner oil guide groove (4122), and the composite flow path (431) includes a connected axial flow path (4311) and a radial flow path (4312); The first inner oil guide groove (4112) and the second inner oil guide groove (4122) are axially connected to form part of the axial flow path (4311); When the first stator lamination group includes the plurality of first stator laminations (411), at least two adjacent first stator laminations (411) among the plurality of first stator laminations (411) are staggered along the circumferential direction of the radial stator (4) so ​​that the first outer oil guide groove (4111) and the first inner oil guide groove (4112) of different first stator laminations (411) are connected in the radial direction of the first stator laminations (411) to form the radial flow path (4312).

24. The motor (10) according to claim 23, wherein, The second stator lamination (412) is provided with a second outer oil guide groove (4121), and the second inner oil guide groove (4122) is located radially inside the second outer oil guide groove (4121). The first outer oil guide groove (4111) and the second outer oil guide groove (4121) are connected in the axial direction of the radial stator (4) to form part of the axial flow path (4311).

25. The motor (10) according to claim 24, wherein, The first external oil guide groove (4111) is disposed on the yoke of the first stator lamination (411); the first external oil guide groove (4111) includes: A first groove (41111) is formed by the outer edge of the first stator lamination (411) recessed radially inward along the first stator lamination (411); and The second slot (41112) is separated from the outer edge of the first stator lamination (411); At least a portion of the first inner oil guide groove (4112) has its first end disposed on the tooth portion of the first stator lamination (411), and at least a portion of the second end of the first inner oil guide groove (4112) extends to the yoke portion of the first stator lamination (411); at least one of the first groove (41111) and the second groove (41112) is adapted to communicate axially with the second outer oil guide groove (4121).

26. The motor (10) according to claim 25, wherein, The at least two adjacent first stator laminations (411) are staggered along the circumferential direction of the radial stator (4) so ​​that the first slots (41111) and the second slots (41112) of the different first stator laminations (411) are radially connected, and the second slots (41112) of the different first stator laminations (411) are radially connected to the first inner oil guide groove (4112) to form the radial flow path (4312).

27. The motor (10) according to claim 26, wherein, The first groove (41111) includes a first groove portion (41111a) and a second groove portion (41111b); the second groove portion (41111b) is connected to the first groove portion (41111a), and the second groove portion (41111b) extends radially inward; The radial inner radius of the first groove (41111a) is greater than the radial outer radius of the second sub-groove (41112); the radial inner radius of the second groove (41111b) is less than the radial outer radius of the second sub-groove (41112).

28. The motor (10) according to claim 27, wherein, The first inner oil guide groove (4112) includes a third sub-groove (41121). The first end of the third sub-groove (41121) is disposed on the tooth of the first stator lamination (411), and the second end of the third sub-groove (41121) extends to the yoke of the first stator lamination (411). The radial outer end radius of the third sub-groove (41121) is greater than the radial inner end radius of the second sub-groove (41112).

29. The motor (10) according to claim 28, wherein, The first inner oil guide groove (4112) further includes a fourth sub-groove (41122); the fourth sub-groove (41122) satisfies at least one of the following: The fourth slot (41122) is disposed on the tooth portion of the first stator lamination (411), and The fourth slot (41122) is located between two adjacent teeth of the first stator lamination (411).

30. The motor (10) according to any one of claims 24-29, wherein, The first outer oil guide groove (4111) and the second outer oil guide groove (4121) are axially connected to form a first axial flow path (43111), and the first inner oil guide groove (4112) and the second inner oil guide groove (4122) are axially connected to form a second axial flow path (43112). The first axial flow path (43111) and the second axial flow path (43112) are connected through the radial flow path (4312).

31. The motor (10) according to claim 30, wherein, The magnetic adjustment assembly (3) includes an axial stator (31), which includes an axial stator core (311) and an axial stator winding (312) wound around the axial stator core (311); the medium ejected from the second axial flow path (43112) is adapted to spray onto the axial stator winding (312).

32. The motor (10) according to any one of claims 21-31, wherein, The outer edge of the first stator lamination (411) is recessed radially inward to form a first oil guide groove (4113). The second stator lamination (412) is provided with a second oil guide groove (4123). The second oil guide groove (4123) is separated from the edge of the second stator lamination (412). The first oil guide groove (4113) and the second oil guide groove (4123) are connected.

33. The motor (10) according to claim 9, comprising the motor cooling assembly, wherein, The motor cooling assembly includes a radial stator core (41).

34. The motor (10) according to claim 33, wherein, A composite flow path (431) is formed in the radial stator core (41), and the composite flow path (431) extends along the axial and radial directions of the radial stator core (41).

35. The motor (10) according to claim 34, wherein, The composite flow path (431) includes at least one axial flow path (4311) and at least one radial flow path (4312), wherein the at least one radial flow path (4312) is connected to the at least one axial flow path (4311).

36. The motor (10) according to claim 35, wherein, The radial stator core (41) includes a first stator lamination group, which includes a plurality of first stator laminations (411). At least two adjacent first stator laminations (411) are staggered along the circumferential direction of the radial stator core (41), so that the first outer oil guide groove (4111) and the first inner oil guide groove (4112) of different first stator laminations (411) are connected in the radial direction of the first stator laminations (411) to form the radial flow path (4312).

37. The motor (10) according to claim 35 or 36, wherein, The radial stator core (41) also includes a second stator lamination group, wherein the second inner oil guide groove (4122) on the second stator lamination group can be axially connected to the first inner oil guide groove (4112) to form part of the axial flow path (4311).

38. The motor (10) according to claim 37, wherein, The second outer oil guide groove (4121) of the second stator lamination group is axially connected to the outer oil guide groove (4111) to form part of the axial flow path (4311).

39. The motor (10) according to any one of claims 34 to 38, wherein, The motor cooling assembly also includes a housing (1), the housing (1) having an installation cavity (12) inside, the radial stator core (41) being installed in the installation cavity (12), the housing (1) having a medium inlet (15), and the composite flow path (431) being connected to the medium inlet (15).

40. The motor (10) according to any one of claims 34 to 39, wherein, The motor cooling assembly also includes a radial stator winding (42), which is wound around the radial stator core (41), and the radial stator core (41) is sleeved on the radial outer side of the rotor (2).

41. The motor (10) according to claim 40, wherein, The radial stator core (41) has an end oil guide ring (5) at its axial end. The end oil guide ring (5) has an oil injection hole. The composite flow path (431) is connected to the oil injection hole. At least a portion of the oil injection hole is arranged opposite to the radial stator winding (42).

42. The motor (10) according to claim 41, wherein, The radial stator winding (42) protrudes axially from the radial stator core (41); the oil injection hole includes a radial oil injection hole, which is arranged opposite to the radial stator winding (42) in the radial direction of the radial stator core (41).

43. The motor (10) according to any one of claims 33 to 42, wherein the radial stator core (41) and the rotor (2) are nested together radially along the rotor (2).

44. The motor (10) according to claim 43 further includes an axial stator (31), said axial stator (31) being disposed at at least one end of the rotor (2) in the axial direction, and the position of said axial stator (31) relative to the axial direction of the rotor (2) is adjustable; wherein, The medium ejected from the composite flow path (431) within the radial stator core (41) is suitable for spraying onto the axial stator (31).

45. The motor (10) according to claim 44, wherein, The motor cooling assembly includes a housing (1) with a movable cavity (11) inside. The motor (10) also includes a magnetic adjustment slider (32). The axial stator (31) is connected to the magnetic adjustment slider (32). The magnetic adjustment slider (32) is movably disposed in the movable cavity (11) at the corresponding end of the rotor (2). The amount of medium in the movable cavity (11) is adjustable to change the axial distance between the magnetic adjustment slider (32) and the rotor (2).

46. ​​The motor (10) according to claim 45, wherein, The outer casing (1) is provided with a first inlet (13) and a second inlet (14), both of which are connected to the moving cavity (11); the magnetic adjustment slider (32) separates the first inlet (13) and the second inlet (14); wherein, a medium is introduced into the moving cavity (11) through the first inlet (13), which is suitable for pushing the magnetic adjustment slider (32) to move axially closer to the rotor (2); A medium is introduced into the moving cavity (11) through the second inlet (14), which is suitable for pushing the magnetic adjustment slider (32) away from the rotor (2) axially.

47. The motor (10) according to any one of claims 44 to 46, wherein, The rotor (2) includes a plurality of rotor laminations (21) and at least one rotor magnetic block (22). The plurality of rotor laminations (21) are stacked along the axial direction of the rotor (2), and any one of the at least one rotor magnetic blocks (22) passes through the plurality of rotor laminations (21) along the axial direction of the rotor (2).

48. The motor (10) according to claim 47, wherein, In a plane projection perpendicular to the axial direction of the rotor (2), at least one rotor magnetic block (22) at least partially overlaps with the axial stator (31).

49. The motor (10) according to claim 47 or 48 further comprises: A rotating shaft (7), on which the rotor (2) is mounted; and The rotor magnetic shielding plate (6) is disposed at both ends of the rotor (2) along the axial direction and is connected to the rotating shaft (7). The rotor magnetic guide block (22) passes through the rotor magnetic shielding plate (6) along the axial direction of the rotor (2).

50. The motor (10) according to any one of claims 33 to 49, wherein, The motor cooling assembly includes a stator core, wherein the stator core includes a radial stator core; the radial stator core includes a first stator lamination group, the first stator lamination group including stator laminations.

51. The motor (10) according to claim 50, wherein, The first stator lamination group includes a plurality of first stator laminations (411), and at least two adjacent first stator laminations (411) are staggered along the circumferential direction of the radial stator core (41), so that the first outer oil guide groove (4111) and the first inner oil guide groove (4112) of different first stator laminations (411) are connected in the radial direction of the first stator laminations (411).

52. The motor (10) according to claim 51, wherein, The stator core also includes a second stator lamination group, which is disposed at both ends of the first stator lamination group along its axial direction.

53. The motor (10) according to claim 52, wherein, The second stator lamination assembly is provided with a second inner oil guide groove (4122), which can be axially connected to the first inner oil guide groove (4112).

54. The motor (10) according to claim 53, wherein, The second stator lamination assembly is also provided with a second outer oil guide groove (4121). The second outer oil guide groove (4121) is located radially outside the second inner oil guide groove (4122). The second outer oil guide groove (4121) can be axially connected to the first outer oil guide groove (4111).

55. The motor (10) according to any one of claims 52 to 54, wherein, The second stator lamination group includes a plurality of second stator laminations (412) stacked along the axial direction.

56. The motor (10) according to any one of claims 50 to 55, wherein, The stator core includes stator laminations, wherein the stator laminations include a first stator lamination (411), the first stator lamination (411) having a spaced-apart first outer oil guide groove (4111) and a first inner oil guide groove (4112); the first inner oil guide groove (4112) is located radially inside the first outer oil guide groove (4111), and the projections of the first inner oil guide groove (4112) and the first outer oil guide groove (4111) along the radial direction of the first stator lamination (411) at least partially overlap.

57. The motor (10) according to claim 56, wherein, The first external oil guide groove (4111) is disposed on the yoke of the first stator lamination (411). The first external oil guide groove (4111) is formed by the outer edge of the first stator lamination (411) being recessed radially inward along the first external oil guide groove (4111). At least a portion of the first internal oil guide groove (4112) has its first end disposed on the tooth of the first stator lamination (411), and its second end extends to the yoke of the first stator lamination (411).

58. The motor (10) according to claim 56, wherein, The first external oil guide groove (4111) is disposed on the yoke of the first stator lamination (411), and the first external oil guide groove (4111) includes: A first groove (41111) is formed by the radial inward recess of the outer edge of the first stator lamination (411) along the first outer oil guide groove (4111); and A second groove (41112) separate from the outer edge of the first stator lamination (411); at least a portion of the first inner oil guide groove (4112) has a first end disposed on the tooth of the first stator lamination (411), and a second end extending to the yoke of the first stator lamination (411).

59. The motor (10) according to claim 58, wherein, The first outer oil guide groove (4111) and the first inner oil guide groove (4112) satisfy at least one of the following: The projections of the first dividing groove (41111) and the first inner oil guide groove (4112) along the radial direction of the first inner oil guide groove (4112) at least partially overlap; and, The projection of the second sub-slot (41112) onto the first inner oil guide groove (4112) in the radial direction of the first inner oil guide groove (4112) is at least partially overlapping.

60. The motor (10) according to claim 58 or 59, wherein, The projections of the second sub-groove (41112) and the first inner oil guide groove (4112) along the radial direction of the first inner oil guide groove (4112) at least partially overlap, while the projections of the first sub-groove (41111) and the first inner oil guide groove (4112) along the radial direction of the first inner oil guide groove (4112) do not overlap.

61. The motor (10) according to claim 60, wherein, The first groove (41111) includes a first groove portion (41111a) and a second groove portion (41111b), and the second groove portion (41111b) is connected to the first groove portion (41111a). The second groove (41111b) extends radially inward, and the projections of the first groove (41111a) and the second sub-groove (41112) along the radial direction of the second sub-groove (41112) at least partially overlap.

62. The motor (10) according to any one of claims 58 to 61, wherein, The first inner oil guide groove (4112) includes a third sub-groove (41121); the first end of the third sub-groove (41121) is disposed on the tooth portion of the first stator lamination (411), and the second end of the third sub-groove (41121) extends to the yoke portion of the first stator lamination (411).

63. The motor (10) according to claim 62, wherein, The third sub-slot (41121) and the first external oil guide slot (4111) satisfy at least one of the following: The projection of the third slot (41121) onto the first slot (41111) along the radial direction of the first slot (41111) at least partially overlaps; and, The projections of the third slot (41121) and the second slot (41112) along the radial direction of the second slot (41112) at least partially overlap.

64. The motor (10) according to claim 62, wherein, The first inner oil guide groove (4112) further includes a fourth sub-groove (41122), wherein the fourth sub-groove (41122) satisfies at least one of the following: The fourth slot (41122) is provided on the tooth portion of the first stator lamination (411); or, The fourth groove (41122) is located between two adjacent teeth.

65. A vehicle (100) comprising an electric drive system (90) including an electric motor (10) according to any one of claims 9 to 64.

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