Magnetic adjustment assembly, electric motor and vehicle

Abstract

A vehicle. The vehicle comprises an electric drive system, wherein the electric drive system comprises an electric motor, which comprises a magnetic adjustment assembly, wherein the magnetic adjustment assembly comprises a magnetically conductive member and a magnetic-adjustment flow path, the magnetically conductive member being suitable for being arranged on a rotor, the magnetic-adjustment flow path being arranged by corresponding to the magnetically conductive member, and the quantity of a medium in the magnetic regulation flow path being adjustable, such that the magnetically conductive member moves close to or away from a magnetic pole of the rotor.

Description

Magnetic adjusting assembly, motor and vehicle

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application with the application date of 2024-06-14, the application number of 202410766442.0, and the patent application name of "Magnetic adjusting assembly, motor, electric drive system and vehicle", the Chinese patent application with the application date of 2024-05-21, the application number of 202410634342.2, and the patent application name of "Motor, electric drive system and vehicle", the Chinese patent application with the application date of 2024-05-21, the application number of 202410634443.X, and the patent application name of "Motor, electric drive system and vehicle", and the Chinese patent application with the application date of 2024-05-21, the application number of 202410634452.9, and the patent application name of "Motor, electric drive system and vehicle", the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of motors, in particular to a magnetic adjusting assembly, a motor and a vehicle with an electric drive system. BACKGROUND

[0004] In related technologies, the rotor end of some variable flux motors is provided with a magnetic yoke and a magnetic yoke adjusting device, and the axial position of the magnetic yoke is adjusted through the additional magnetic yoke adjusting device, so as to realize the adjustment of the working magnetic field. However, the above-mentioned variable flux motor has a high requirement for the arrangement space, and thus there is room for improvement.

[0005] SUMMARY

[0006] The present application aims to at least solve one of the above technical problems in the prior art to some extent. To this end, the present application provides a magnetic adjusting assembly, which adjusts the position of the magnetic member on the rotor to effectively adjust the working magnetic field.

[0007] The present application also provides a motor with the above-mentioned magnetic adjusting assembly.

[0008] The present application also provides an electric drive system with the above-mentioned motor.

[0009] The present application also provides a vehicle with the above-mentioned electric drive system.

[0010] The magnetic adjusting assembly according to the embodiments of the present application comprises a magnetic member and a magnetic adjusting flow path, the magnetic member is adapted to be arranged on the rotor, the magnetic adjusting flow path is arranged corresponding to the magnetic member, and the amount of medium in the magnetic adjusting flow path is adjustable to make the magnetic member close to or away from the magnetic pole of the rotor.

[0011] According to the magnetic adjusting assembly, the relative distance between the magnetic conducting member and the magnetic pole of the rotor can be actively adjusted by adjusting the medium in the magnetic adjusting flow path, so that the effective adjustment of the motor working magnetic field is realized, and the motor has good controllability and low space requirement.

[0012] According to some embodiments of the present application, the magnetic conducting member can reciprocate along the radial direction of the rotor.

[0013] According to some embodiments of the present application, the magnetic conducting member can reciprocate along the circumferential direction of the rotor, and / or the magnetic conducting member can reciprocate along the axial direction of the rotor.

[0014] According to some embodiments of the present application, the magnetic adjusting assembly comprises: an elastic member, one end of the elastic member is connected to the magnetic conducting member, and the other end of the elastic member is fixed relative to the rotor.

[0015] According to some embodiments of the present application, the elastic member can have a first state, in which the first amount of medium is in the magnetic adjusting flow path, so that the magnetic conducting member is in the first position away from the magnetic pole of the rotor; the elastic member can have a second state, in which the second amount of medium is in the magnetic adjusting flow path, so that the magnetic conducting member is in the second position close to the magnetic pole of the rotor.

[0016] According to some embodiments of the present application, the elastic member can have a first state, in which the first amount of medium is in the magnetic adjusting flow path, so that the magnetic conducting member is in the first position away from the magnetic pole of the rotor; the elastic member can have a second state, in which the second amount of medium is in the magnetic adjusting flow path, so that the magnetic conducting member is in the second position close to the magnetic pole of the rotor.

[0017] According to some embodiments of the present application, each magnetic conducting member is correspondingly provided with a plurality of elastic members, and the plurality of elastic members are connected to the magnetic conducting member in the axial direction of the rotor.

[0018] According to some embodiments of the present application, the magnetic adjusting assembly further comprises: a magnetic adjusting shell, one end of the elastic member is connected to the magnetic conducting member, and the other end of the elastic member is connected to the magnetic adjusting shell.

[0019] According to some embodiments of the present application, the magnetic adjusting shell has a magnetic adjusting cavity, the magnetic adjusting flow path is formed in the magnetic adjusting shell, the magnetic adjusting shell is provided with an inlet, the magnetic conducting member is arranged in the magnetic adjusting cavity, and the magnetic conducting member can reciprocate in the magnetic adjusting cavity.

[0020] According to another aspect of the present application, the motor comprises a rotor and the above-mentioned magnetic adjusting assembly, and the magnetic adjusting assembly is arranged on the rotor.

[0021] According to the motor of the embodiment of the present application, the relative distance between the magnetic conductive member and the magnetic pole of the rotor is actively adjusted, so that the effective adjustment of the working magnetic field of the motor is realized, and the motor has good controllability and low space requirement.

[0022] According to some embodiments of the present application, the rotor is provided with a magnetic adjustment groove, and the magnetic adjustment assembly is located in the magnetic adjustment groove.

[0023] According to some embodiments of the present application, the rotor is provided with a magnetic steel groove for mounting the magnetic steel, and the magnetic steel groove is spaced apart from the magnetic adjustment groove.

[0024] According to some embodiments of the present application, the rotor is provided with a magnetic steel groove for mounting the magnetic steel, and the magnetic steel groove is spaced apart from the magnetic adjustment groove.

[0025] According to some embodiments of the present application, the rotor has a plurality of magnetic poles, and the magnetic adjustment assembly is arranged on the center line of the magnetic pole or arranged on the center line between two adjacent magnetic poles.

[0026] According to some embodiments of the present application, the rotor has a rotor flow path, and the magnetic adjustment flow path communicates with the rotor flow path.

[0027] According to some embodiments of the present application, the motor further comprises a rotating shaft, the rotating shaft has a rotating shaft flow path, the rotor is mounted on the rotating shaft, and the rotating shaft flow path and the magnetic adjustment flow path communicate with each other through the rotor flow path.

[0028] According to some embodiments of the present application, the rotating shaft flow path comprises a rotating shaft cavity and a rotating shaft through hole arranged on the rotating shaft, the rotating shaft cavity has an inlet end, the rotating shaft through hole communicates the rotating shaft cavity and the outer circumferential surface of the rotating shaft, and the rotating shaft through hole communicates with the rotor flow path.

[0029] According to some embodiments of the present application, the rotor comprises a plurality of rotor laminations, the plurality of rotor laminations are stacked in the axial direction, the rotor lamination is provided with a magnetic adjustment groove and a flow path groove, the magnetic adjustment groove and the flow path groove both penetrate the rotor lamination in the thickness direction of the rotor lamination, the magnetic adjustment assembly is mounted in the magnetic adjustment groove, the flow path grooves of the plurality of rotor laminations are communicated to form a rotor flow path, and the rotor flow path communicates with the magnetic adjustment groove.

[0030] According to some embodiments of the present application, the flow path groove comprises a first flow path groove and a second flow path groove, the rotor comprises a plurality of core segments, each core segment comprises one rotor lamination or a plurality of rotor laminations with the same arrangement angle, at least two adjacent core segments are staggered by a preset angle in the circumferential direction, so that the first flow path groove of one core segment and the second flow path groove of the adjacent core segment are communicated in the axial direction and the radial direction.

[0031] According to some embodiments of the present application, the rotor lamination is provided with a rotor shaft hole through which the rotor shaft passes, the first flow path groove includes a plurality of first sub-grooves, the plurality of first sub-grooves are radially distributed along the rotor lamination, the first sub-groove at the radially innermost end is connected to the rotor shaft hole, the first sub-groove at the radially outermost end is connected to the flux modulation groove, and the second flow path groove is adapted to be separated from both the flux modulation groove and the rotor shaft hole, and the second flow path groove is used to connect different first sub-grooves on adjacent core segments.

[0032] According to some embodiments of the present application, the first flow path groove and the second flow path groove are alternately arranged along the circumferential direction of the rotor lamination.

[0033] According to some embodiments of the present application, the first flow path groove and the second flow path groove are alternately arranged uniformly, and the preset angle is equal to the central angle between the first flow path groove and the second flow path groove.

[0034] According to some embodiments of the present application, the motor further comprises a rotor magnetic shield plate, the rotor magnetic shield plate is arranged at least at one end of the rotor in the axial direction, and the rotor abuts against the rotor magnetic shield plate.

[0035] According to some embodiments of the present application, the rotor magnetic shield plate further comprises a magnetic shield plate through hole, the magnetic shield plate through hole penetrates through the rotor magnetic shield plate along the thickness direction of the rotor magnetic shield plate, and the flux modulation flow path is connected to the magnetic shield plate through hole.

[0036] According to some embodiments of the present application, the magnetic shield plate through hole is a plurality of magnetic shield plate through holes, and the plurality of magnetic shield plate through holes are distributed along the circumferential direction of the rotor.

[0037] According to some embodiments of the present application, the rotor magnetic shield plate has a magnetic shield plate flow path, and the flux modulation flow path is connected to the magnetic shield plate flow path to adjust the relative position of the flux modulation assembly and the magnetic pole of the rotor.

[0038] According to some embodiments of the present application, the rotor magnetic shield plate comprises a magnetic shield plate first side surface facing the rotor and a magnetic shield plate second side surface facing away from the rotor, and the magnetic shield plate flow path comprises a recessed groove arranged on the magnetic shield plate first side surface, and the recessed groove is connected to the flux modulation flow path.

[0039] According to some embodiments of the present application, the recessed groove is a plurality of recessed grooves, and the plurality of recessed grooves are distributed along the circumferential direction of the rotor magnetic shield plate and extend along the radial direction of the rotor magnetic shield plate.

[0040] According to some embodiments of the present application, the rotor magnetic shield plate is arranged at both ends of the rotor in the axial direction, and the rotor abuts against the rotor magnetic shield plate at the corresponding end.

[0041] According to some embodiments of the present application, the recessed groove of the rotor magnetic isolation plate at one end of the rotor is in communication with the recessed groove of the rotor magnetic isolation plate at the other end of the rotor through the magnetic flux adjusting flow path.

[0042] According to some embodiments of the present application, the rotor magnetic isolation plate at one end of the rotor is circumferentially staggered by a preset angle with the rotor magnetic isolation plate at the other end of the rotor, so that the recessed groove of the rotor magnetic isolation plate at one end of the rotor is in communication with the corresponding magnetic flux adjusting flow path, and the recessed groove of the rotor magnetic isolation plate at the other end of the rotor is in communication with the corresponding magnetic flux adjusting flow path.

[0043] According to some embodiments of the present application, the magnetic isolation plate flow path further comprises a magnetic isolation plate through hole penetrating through the rotor magnetic isolation plate along the thickness direction of the rotor magnetic isolation plate, and the magnetic flux adjusting flow path is in communication with the magnetic isolation plate through hole.

[0044] According to some embodiments of the present application, the magnetic isolation plate through hole is a plurality of magnetic isolation plate through holes, and the plurality of magnetic isolation plate through holes are dispersedly arranged along the circumferential direction of the rotor.

[0045] According to some embodiments of the present application, the recessed groove is a plurality of recessed grooves, and the magnetic isolation plate through hole and the recessed groove are alternately arranged along the circumferential direction of the rotor.

[0046] According to some embodiments of the present application, the rotor magnetic isolation plate at one end of the rotor is circumferentially staggered by a preset angle with the rotor magnetic isolation plate at the other end of the rotor, so that the recessed groove of the rotor magnetic isolation plate at one end of the rotor is in communication with the magnetic isolation plate through hole of the rotor magnetic isolation plate at the other end of the rotor through the magnetic flux adjusting flow path.

[0047] According to some embodiments of the present application, the motor further comprises a rotor shaft having a rotor shaft flow path, the rotor is mounted on the rotor shaft, and the recessed groove is also in communication with the rotor shaft flow path.

[0048] According to some embodiments of the present application, the rotor shaft flow path comprises a rotor shaft cavity provided in the rotor shaft and a rotor shaft through hole, the rotor shaft cavity has an inlet end, the rotor shaft through hole is in communication with the rotor shaft cavity and the outer circumferential surface of the rotor shaft, and the rotor shaft through hole is in communication with the recessed groove.

[0049] According to another aspect of the embodiment of the present application, an electric drive system comprises the above-mentioned motor.

[0050] According to the electric drive system of the embodiment of the present application, the relative distance between the magnetic pole of the magnetic flux guiding member and the rotor is actively adjusted, so that the effective adjustment of the working magnetic field of the motor is realized, and the motor has good controllability and low space requirement.

[0051] The vehicle according to another aspect of the embodiments of the present application comprises the electric drive system described above.

[0052] The vehicle according to the embodiments of the present application can actively adjust the relative distance between the magnetic pole of the rotor and the magnetic conductive member by adjusting the medium in the magnetic flux adjusting channel, thereby effectively adjusting the working magnetic field of the motor and having good controllability and low space requirement for the motor.

[0053] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0054] Fig. 1 is a perspective view of the rotating shaft, rotor, rotor magnetic shield, first bearing and second bearing of the motor according to the embodiments of the present application;

[0055] Fig. 2 is a front view of one embodiment of the structure shown in Fig. 1;

[0056] Fig. 3 is an enlarged view of the portion A in Fig. 2;

[0057] Fig. 4 is a top view of the stator, rotor and magnetic flux adjusting assembly;

[0058] Fig. 5 is a top view of one of the magnetic poles of the structure shown in Fig. 4 (the magnetic conductive member is in the first position);

[0059] Fig. 6 is a top view of one of the magnetic poles of the structure shown in Fig. 4 (the magnetic conductive member is in the second position);

[0060] Fig. 7 is a perspective view of the magnetic flux adjusting assembly;

[0061] Fig. 8 is a perspective view of the magnetic conductive member and elastic member;

[0062] Fig. 9 is a perspective view of the magnetic conductive member;

[0063] Fig. 10 is a sectional view of the magnetic flux adjusting assembly;

[0064] Fig. 11 is a top view of the stator and rotor;

[0065] Fig. 12 is a schematic view of the rotor lamination;

[0066] Fig. 13 is a perspective view of the rotating shaft;

[0067] Fig. 14 is a sectional view of the rotating shaft;

[0068] Fig. 15 is a perspective view of the rotor magnetic shield in the embodiment of Fig. 2;

[0069] Fig. 16 is a front view of another embodiment of the structure shown in Fig. 1;

[0070] Figure 17 is a perspective view of a rotor flux barrier in the embodiment of Figure 16;

[0071] Figure 18 is a plan view of a stator, rotor and flux modulation assembly;

[0072] Figure 19 is a plan view of one of the poles of the structure shown in Figure 18 (flux guide in first position);

[0073] Figure 20 is a plan view of one of the poles of the structure shown in Figure 18 (flux guide in second position);

[0074] Figure 21 is a schematic view of a rotor lamination;

[0075] Figure 22 is a plan view of a stator, rotor and flux modulation assembly;

[0076] Figure 23 is a plan view of one of the poles of the structure shown in Figure 22 (flux guide in first position);

[0077] Figure 24 is a plan view of one of the poles of the structure shown in Figure 22 (flux guide in second position);

[0078] Figure 25 is a schematic view of a rotor lamination;

[0079] Figure 26 is a front cross-sectional view of one embodiment of the structure shown in Figure 1 ;

[0080] Figure 27 is a perspective view of a rotor flux barrier in the embodiment of Figure 26;

[0081] Figure 28 is a front cross-sectional view of another embodiment of the structure shown in Figure 1 ;

[0082] Figure 29 is a perspective view of a rotor flux barrier in the embodiment of Figure 28;

[0083] Figure 30 is a plan view of a stator, rotor and flux modulation assembly;

[0084] Figure 31 is a plan view of one of the poles of the structure shown in Figure 30 (flux guide in second position);

[0085] Figure 32 is a schematic view of a rotor lamination;

[0086] Figure 33 is a perspective view of a rotor shaft;

[0087] Figure 34 is a cross-sectional view of a rotor shaft;

[0088] Figure 35 is a schematic view of an electric drive system according to an embodiment of the application;

[0089] Figure 36 is a schematic view of a vehicle according to an embodiment of the application.

[0090] Fig. 1 is a schematic diagram of a vehicle 100 according to an embodiment of the present application, Fig. 2 is a schematic diagram of an electric drive system 90 according to an embodiment of the present application, Fig. 3 is a schematic diagram of an electric motor 10 according to an embodiment of the present application, Fig. 4 is a schematic diagram of a magnetic adjusting assembly 3 according to an embodiment of the present application, Fig. 5 is a schematic diagram of a rotor 2 according to an embodiment of the present application, Fig. 6 is a schematic diagram of a rotor flow path 20 according to an embodiment of the present application, Fig. 7 is a schematic diagram of a rotor lamination 21 according to an embodiment of the present application, Fig. 8 is a schematic diagram of a rotor shaft hole 211 according to an embodiment of the present application, Fig. 9 is a schematic diagram of a magnetic adjusting slot 212 according to an embodiment of the present application, Fig. 10 is a schematic diagram of a magnetic steel slot 213 according to an embodiment of the present application, Fig. 11 is a schematic diagram of a first flow path slot 2141 according to an embodiment of the present application, Fig. 12 is a schematic diagram of a second flow path slot 2142 according to an embodiment of the present application, Fig. 13 is a schematic diagram of a permanent magnet 23 according to an embodiment of the present application, Fig. 14 is a schematic diagram of a magnetic adjusting assembly 3 according to an embodiment of the present application, Fig. 15 is a schematic diagram of a magnetic adjusting flow path 30 according to an embodiment of the present application, Fig. 16 is a schematic diagram of a magnetic permeable member 31 according to an embodiment of the present application, Fig. 17 is a schematic diagram of a positioning slot 311 according to an embodiment of the present application, Fig. 18 is a schematic diagram of an elastic member 32 according to an embodiment of the present application, Fig. 19 is a schematic diagram of a magnetic adjusting housing 33 according to an embodiment of the present application, Fig. 20 is a schematic diagram of an inlet flow port 331 according to an embodiment of the present application, Fig. 21 is a schematic diagram of a magnetic adjusting cavity 332 according to an embodiment of the present application, Fig. 22 is a schematic diagram of a stator 4 according to an embodiment of the present application, Fig. 23 is a schematic diagram of a stator core 41 according to an embodiment of the present application, Fig. 24 is a schematic diagram of a stator winding 42 according to an embodiment of the present application, Fig. 25 is a schematic diagram of a rotor magnetic shield 6 according to an embodiment of the present application, Fig. 26 is a schematic diagram of a magnetic shield through hole 61 according to an embodiment of the present application, Fig. 27 is a schematic diagram of a magnetic shield shaft hole 62 according to an embodiment of the present application, Fig. 28 is a schematic diagram of a rotating shaft 7 according to an embodiment of the present application, Fig. 29 is a schematic diagram of a rotating shaft flow path 70 according to an embodiment of the present application, Fig. 30 is a schematic diagram of a rotating shaft cavity 71 according to an embodiment of the present application, Fig. 31 is a schematic diagram of a rotating shaft through hole 72 according to an embodiment of the present application, Fig. 32 is a schematic diagram of a rotating shaft flange 73 according to an embodiment of the present application, Fig. 33 is a schematic diagram of a first bearing 81 according to an embodiment of the present application, Fig. 34 is a schematic diagram of a second bearing 82 according to an embodiment of the present application, Fig. 35 is a schematic diagram of a vehicle 100 according to an embodiment of the present application, and Fig. 36 is a schematic diagram of an electric drive system 90 according to an embodiment of the present application. DETAILED DESCRIPTION

[0091] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and are not intended to be limiting of the present application. Throughout the drawings, same or similar components are denoted by same reference numerals, and repeated description is omitted.

[0092] In the description of the present application, the terms "first", "second", and the like are used only for the purpose of description, and are not to be construed as indicating or implying relative importance or a specific number of the technical features indicated. Thus, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0093] The magnetic adjusting assembly 3 according to embodiments of the present application, the electric motor 10 with the magnetic adjusting assembly 3, the electric drive system 90 with the electric motor 10, and the vehicle 100 with the electric drive system 90 are described in detail below with reference to Figs. 1-36.

[0094] Referring to Figs. 1-4, the magnetic adjusting assembly 3 according to embodiments of the present application can be used in the electric motor 10, the electric motor 10 includes the rotor 2, and the magnetic adjusting assembly 3 includes the magnetic permeable member 31 and the magnetic adjusting flow path 30.

[0095] The magnetic permeable member 31 is adapted to be disposed on the rotor 2, and the magnetic adjusting flow path 30 is disposed corresponding to the magnetic permeable member 31. The medium quality in the magnetic adjusting flow path 30 can be adjusted to make the magnetic permeable member 31 approach or move away from the magnetic poles of the rotor 2. In other words, by changing the medium quality in the magnetic adjusting flow path 30, the relative distance between the magnetic permeable member 31 and the magnetic poles of the rotor 2 can be adjusted.

[0096] Optionally, the magnetic permeable member 31 can use permanent magnetic material or soft magnetic material.

[0097] The magnetic adjusting assembly 3 is an assembly for adjusting the air gap magnetic field of the motor 10 by changing the leakage magnetic flux of the permanent magnet. The magnetic adjusting assembly 3 can adjust the position of the magnetic conducting piece 31 on the rotor 2 by changing the medium in the magnetic adjusting flow path 30. Specifically, the magnetic conducting piece 31 can reciprocate relative to the rotor 2, and the medium in the magnetic adjusting flow path 30 can be used to adjust the position of the magnetic conducting piece 31 on the rotor 2, so that the magnetic conducting piece 31 is close to or away from the magnetic pole of the rotor 2, the position of the magnetic conducting piece 31 is continuously and finely adjusted, and the magnetic flux of the motor is adjusted in real time, thereby optimizing the performance of the motor.

[0098] In the related art, the rotor end of some variable flux motors is provided with a magnetic yoke and a magnetic yoke adjusting device, and the axial position of the magnetic yoke is adjusted by the magnetic yoke adjusting device to achieve adjustment of the working magnetic field. However, axial adjustment has high requirements for the space of the motor. According to the magnetic adjusting assembly 3 of the embodiments of the present application, the relative distance between the magnetic conducting piece 31 and the magnetic pole of the rotor 2 can be actively adjusted by adjusting the medium in the magnetic adjusting flow path 30, thereby effectively adjusting the working magnetic field of the motor 10 and having good controllability. Compared with the axial adjustment in the related art, the magnetic conducting piece 31 in the present application is arranged on the rotor 2, which does not occupy additional axial space and has low requirements for the space of the motor 10.

[0099] The magnetic adjusting assembly 3 according to the embodiments of the present application can effectively adjust the permanent magnetic field of the motor 10 and can control the no-load back electromotive force and voltage of the motor 10 in real time; for example, in the low-speed region, the no-load back electromotive force (i.e., the permanent magnetic flux) is increased by adjusting the magnetic field, thereby increasing the torque performance and power performance in the low-speed region; in the high-speed region, the no-load back electromotive force can be reduced in real time by adjusting the magnetic field, which not only reduces the core loss, widens the constant power region, increases the peak torque / power in the high-speed region, but also avoids damage to the power device due to overvoltage of the inverter, thereby adding a layer of protection to the electric drive system. At the same time, it is beneficial to improve the high-efficiency region of the motor 10 and to achieve high matching between the high-efficiency region of the motor 10 and the working condition points of the new energy vehicle, thereby reducing power consumption and improving economic efficiency.

[0100] In addition to adjusting the permanent magnetic flux, the magnetic adjusting assembly 3 of the present application can also adjust the winding inductance of the motor 10 (the magnetic conducting piece 31 in the magnetic adjusting assembly 3 is beneficial to increasing the inductance of the motor 10), which is beneficial to multiplexing the inductance of the motor 10 to realize self-heating or charging of the battery on the vehicle and the like, thereby reducing current harmonics and reducing the risk of heating and demagnetization of the magnetic steel.

[0101] In some embodiments of the present application, the magnetic conducting piece 31 can reciprocate relative to the rotor 2, for example, the magnetic conducting piece 31 can reciprocate in a first direction relative to the rotor 2. Thus, in the first direction, the position of the magnetic conducting piece 31 on the rotor 2 is always within a preset stroke range, which is beneficial to regular adjustment of the working magnetic field of the motor 10 and avoids the problem of magnetic adjustment failure when the magnetic conducting piece 31 exceeds the preset stroke range.

[0102] In some embodiments of the present application, the first direction is the radial direction of the rotor 2, as shown in FIGS. 5-6, 18-21, 30-31, 32. That is, the magnetic conductor 31 is capable of reciprocating along the radial direction of the rotor 2 to change the original magnetic conducting performance of the rotor 2, so as to effectively adjust the working magnetic field of the motor 10.

[0103] In some embodiments of the present application, the magnetic conductor 31 is also capable of reciprocating along the circumferential direction of the rotor 2; and / or, the magnetic conductor 31 is capable of reciprocating along the axial direction of the rotor 2. Specifically, while the magnetic conductor 31 reciprocates along the radial direction of the rotor 2, the magnetic conductor 31 can also reciprocate along the circumferential direction and / or the axial direction of the rotor 2 to meet different adjustment requirements. For example, the magnetic conductor 31 can reciprocate along the radial direction and ascend or descend at the same time, in which case the magnetic conductor 31 reciprocates along the radial direction of the rotor 2 while the magnetic conductor 31 reciprocates along the axial direction of the rotor 2. For another example, the magnetic conductor 31 can reciprocate along the radial direction of the rotor 2 while the magnetic conductor 31 reciprocates along the circumferential direction of the rotor 2.

[0104] In some embodiments of the present application, the magnetic adjusting assembly 3 further comprises an elastic member 32, one end of the elastic member 32 is connected to the magnetic conductor 31, and the other end of the elastic member 32 is fixed relative to the rotor 2, and the elastic member 32 is adapted to apply an elastic force to the magnetic conductor 31 for moving the magnetic conductor 31.

[0105] In some embodiments of the present application, the elastic member 32 can have a first state in which the magnetic adjusting flow path 30 has a first amount of medium to make the magnetic conductor 31 be at a first position away from the magnetic poles of the rotor 2, and the elastic member 32 can have a second state in which the magnetic adjusting flow path 30 has a second amount of medium to make the magnetic conductor 31 be at a second position close to the magnetic poles of the rotor 2. The length of the elastic member 32 in the first state is less than the length of the elastic member 32 in the second state.

[0106] Optionally, the elastic member 32 is adapted to apply an elastic force to the magnetic conductor 31 for moving the magnetic conductor 31 to the first position, the medium in the magnetic adjusting flow path 30 is used to push the magnetic conductor 31 to the second position, and / or, the medium in the magnetic adjusting flow path 30 is used to keep the magnetic conductor 31 at a target position. That is, when the rotor 2 does not rotate, the magnetic conductor 31 is kept at the first position under the elastic force of the elastic member 32, when the amount of medium in the magnetic adjusting flow path 30 increases to cause the pushing force to increase, the magnetic conductor 31 can be pushed to the second position, and by reasonably controlling the amount of medium in the magnetic adjusting flow path 30, the magnetic conductor 31 can also be kept at a target position, which can be the first position or the second position or any intermediate position between the first position and the second position.

[0107] When the rotor 2 rotates, the magnetic conducting piece 31 moves to the radial outside under the action of centrifugal force, and moves to the target position under the action of centrifugal force, elastic force and hydraulic pressure. When the rotor 2 stops rotating, the restoring force of the elastic piece 32 restores the magnetic conducting piece 31 to the first position.

[0108] In some embodiments of the present application, referring to FIGS. 4-6 and 11-12, the magnet adjusting assembly 3 is adapted to be arranged in the magnet adjusting groove 212 of the rotor 2, that is, the magnetic conducting piece 31 is located in the magnet adjusting groove 212, and the magnetic conducting piece 31 can reciprocate in the magnet adjusting groove 212. Specifically, the magnet adjusting groove 212 is arranged extending along the first direction, and the magnetic conducting piece 31 can reciprocate in the first direction in the magnet adjusting groove 212. The stroke of the magnetic conducting piece 31 is limited in the magnet adjusting groove 212, so that the position of the magnetic conducting piece 31 on the rotor 2 is accurate, and the reliability and stability of magnet adjustment are high.

[0109] In the radial direction of the rotor 2, the first position is located on the radial side of the second position. In some embodiments shown in FIGS. 4-6, the first position is located on the radial inner side of the second position, that is, the first position is the position close to the radial inner side of the magnet adjusting groove 212, and the second position is the position close to the radial outer side of the magnet adjusting groove 212. In this way, when the rotor 2 does not rotate, the magnetic conducting piece 31 is kept at the position close to the radial inner side of the magnet adjusting groove 212 under the action of the elastic force of the elastic piece 32, as shown in FIG. 5; when the amount of medium in the magnet adjusting flow path 30 increases to cause the thrust to increase, the magnetic conducting piece 31 can be pushed to move to the position close to the radial outer side of the magnet adjusting groove 212, as shown in FIG. 6, and by reasonably controlling the amount of medium in the magnet adjusting flow path 30, the magnetic conducting piece 31 can also be kept at the position close to the radial outer side of the magnet adjusting groove 212.

[0110] In some embodiments of the present application, referring to FIGS. 9-10, the magnetic conducting piece 31 is provided with a positioning groove 311, and one end of the elastic piece 32 is embedded in the positioning groove 311, so that the relative position of the elastic piece 32 and the magnetic conducting piece 31 is accurate, and the elastic piece 32 is prevented from being deflected when the elastic piece 32 exerts the elastic force on the magnetic conducting piece 31.

[0111] The elastic piece 32 can be a spring or other forms, and the elastic form is not limited to stretching or compression. For example, the elastic piece 32 can be a compression spring, which exerts a thrust on the magnetic conducting piece 31 to move the magnetic conducting piece 31 to the first position, at this time, the elastic piece 32 is in a compressed state. Alternatively, the elastic piece 32 can be a tension spring, which exerts a tension on the magnetic conducting piece 31 to move the magnetic conducting piece 31 to the first position, at this time, the elastic piece 32 is in a stretched state.

[0112] When the rotor 2 rotates, the elastic force of the elastic member 32 on the magnetic conducting member 31 changes under the action of the centrifugal force. For example, when the first position is radially inside the second position, after the rotor 2 rotates, the magnetic conducting member 31 can move radially outward, thereby the elastic member 32 can passively adjust the position of the magnetic conducting member 31 on the rotor 2.

[0113] In some embodiments of the present application, referring to FIG. 8, a plurality of elastic members 32 are arranged corresponding to each magnetic conducting member 31, and the plurality of elastic members 32 are connected with the magnetic conducting member 31 in the axial direction of the rotor 2. By arranging a plurality of elastic members 32 for each magnetic conducting member 31 and connecting the plurality of elastic members 32 with the magnetic conducting member 31 in the axial direction of the rotor 2, the magnetic conducting member 31 is supported at multiple points in the axial direction, so that the magnetic conducting member 31 can be more uniformly and stably stressed, the plurality of elastic members 32 cooperate and cooperate with the medium in the magnetic adjusting flow path 30 to enhance the stability of the magnetic conducting member 31 during movement, further improving the accuracy and stability of position adjustment. In addition, by adjusting the number, distribution and elastic coefficient of the elastic member 32, the movement characteristics of the magnetic conducting member 31 can be accurately controlled to adapt to different working conditions and requirements.

[0114] In some embodiments of the present application, referring to FIGS. 1-3 and 7-10, the magnetic adjusting assembly 3 further comprises a magnetic adjusting shell 33, one end of the elastic member 32 is connected with the magnetic conducting member 31, and the other end of the elastic member 32 is connected with the magnetic adjusting shell 33. The magnetic adjusting shell 33 can be installed in the magnetic adjusting groove 212. By arranging the magnetic adjusting shell 33, the magnetic conducting member 31 and the elastic member 32 can be protected, and the magnetic adjusting assembly 3 becomes a whole, which facilitates the installation of the magnetic adjusting assembly 3 as a whole in the magnetic adjusting groove 212, or the disassembly of the magnetic adjusting assembly 3 as a whole from the magnetic adjusting groove 212.

[0115] Optionally, the surface of the magnetic conducting member 31 can be provided with a ball, so that the friction between the magnetic conducting member 31 and the inner wall of the magnetic adjusting shell 33 is small, and the movement of the magnetic conducting member 31 is more stable and smooth.

[0116] In some embodiments of the present application, referring to FIGS. 1-3, 7-10, the magnetic adjustment shell 33 has a magnetic adjustment cavity 332, the magnetic adjustment flow path 30 is formed in the magnetic adjustment shell 33, the magnetic adjustment shell 33 is provided with an inlet 331, the magnetic guide 31 is arranged in the magnetic adjustment cavity 332, and the magnetic guide 31 can reciprocate in the magnetic adjustment cavity 332. When the magnetic adjustment cavity 332 extends in the first direction, the magnetic guide 31 can reciprocate in the first direction in the magnetic adjustment cavity 332. In FIG. 10, the first position is a radially inner position in the magnetic adjustment cavity 332, the second position is a radially outer position in the magnetic adjustment cavity 332, the elastic member 32 is a spring, and the spring causes the magnetic guide 31 to have a tendency to move radially inward. When the amount of medium in the magnetic adjustment flow path 30 increases to cause the thrust to increase, the magnetic guide 31 can be pushed to move radially outward, so as to change the position of the magnetic guide 31 on the rotor 2, so as to change the magnetic field between the rotor 2 and the stator 4.

[0117] Optionally, in some embodiments, the inlet 331 is located on the side of the spring away from the magnetic adjustment block 31.

[0118] In other embodiments, as shown in FIG. 10, the inlet 331 is located on the side of the magnetic adjustment block 31 away from the spring.

[0119] Referring to FIGS. 1-4, according to another aspect of the present application, the motor 10 includes the rotor 2 and the magnetic adjustment assembly 3 of the above-mentioned embodiments, and the magnetic adjustment assembly 3 is arranged on the rotor 2.

[0120] According to the motor 10 of the embodiments of the present application, the relative distance between the magnetic guide 31 and the magnetic pole of the rotor 2 is actively adjusted, so as to effectively adjust the working magnetic field of the motor, and the motor has good controllability and low space requirement.

[0121] In some embodiments of the present application, referring to FIGS. 4-6, 11-12, the rotor 2 is provided with a magnetic adjustment groove 212, the magnetic adjustment assembly 3 is located in the magnetic adjustment groove 212, or the magnetic guide 31 is located in the magnetic adjustment groove 212, and the magnetic guide 31 can reciprocate in the magnetic adjustment groove 212. The magnetic adjustment groove 212 provides a movable space for the magnetic guide 31, so as to reduce friction loss and improve the response speed of the magnetic adjustment.

[0122] In some embodiments of the present application, in combination with FIGS. 4-6, the rotor 2 has a plurality of magnetic poles, and the magnetic adjustment assembly 3 is arranged on the center line of the magnetic poles, or the magnetic adjustment assembly 3 is arranged on the center line between two adjacent magnetic poles. In other words, the magnetic adjustment assembly 3 is arranged on the direct axis or the cross axis of the magnetic poles.

[0123] In some embodiments of the present application, the rotor 2 has a rotor flow path 20, and the flux adjusting flow path 30 is in communication with the rotor flow path 20. Specifically, when the flux adjusting assembly 3 includes a flux adjusting housing 33, the flux adjusting flow path 30 is in communication with the rotor flow path 20 through an inlet 331. When the flux adjusting assembly 3 does not include the flux adjusting housing 33, the flux adjusting flow path 30 is directly in communication with the rotor flow path 20.

[0124] The rotor flow path 20 and the flux adjusting flow path 30 constitute at least part of a system flow path for delivering medium to the position of the flux guide 31 to drive the flux guide 31 to move, thereby actively adjusting the position of the flux guide 31 and actively adjusting the flux.

[0125] In some embodiments of the present application, the motor 10 can further include a shaft 7, the shaft 7 has a shaft flow path 70, the rotor 2 is installed on the shaft 7, the rotor flow path 20 is in communication with the shaft flow path 70, the shaft flow path 70 and the flux adjusting flow path 30 are in communication through the rotor flow path 20, and the shaft flow path 70, the rotor flow path 20 and the flux adjusting flow path 30 constitute a system flow path, and the medium flow direction of the system flow path is shown by arrows in FIGS. 2-3. In this way, when the flux adjusting assembly 3 includes the flux adjusting housing 33, the oil in the shaft flow path 70 can enter the flux adjusting housing 33, i.e., the flux adjusting flow path 30, through the rotor flow path 20 and the inlet 331. When the flux adjusting assembly 3 does not include the flux adjusting housing 33, the oil in the shaft flow path 70 can directly enter the flux adjusting flow path 30 through the rotor flow path 20.

[0126] Optionally, the shaft flow path 70 can be directly connected to a medium source outside the motor 10, or can be connected to the medium source through a connecting pipe. After the medium from the medium source enters the shaft flow path 70, it further enters the flux adjusting flow path 30 through the rotor flow path 20. By changing the amount of medium in the flux adjusting flow path 30, the position of the flux guide 31 on the rotor 2 can be actively adjusted. When the position of the flux guide 31 on the rotor 2 changes, the original flux guiding performance of the rotor 2 is changed, and the magnetic field between the rotor 2 and the stator 4 is changed accordingly, thereby effectively adjusting the working magnetic field of the motor 10.

[0127] In other embodiments, the shaft flow path 70 can not be provided inside the shaft 7, and oil can be directly fed into the rotor flow path 20 from the end of the rotor 2, and then the oil enters the flux adjusting flow path 30.

[0128] In addition to serving as the driving force for the movement of the flux guide 31, the medium can also provide certain heat dissipation for the shaft 7 and the rotor 2, so that the temperature of the motor 10 during operation is not too high, which is beneficial to improve the service life of the motor 10.

[0129] Optionally, the medium can be a gas, such as helium, nitrogen, etc.; or the medium can be a liquid, such as oil, water, etc. For the sake of convenience, the oil is taken as an example to be described below.

[0130] In combination with the mechanical magnet adjustment of the elastic member 32 and the medium magnet adjustment of the magnet adjustment flow path 30, the motor 10 according to the embodiments of the present application adopts a passive mechanical magnet adjustment and an active medium magnet adjustment in combination, so that the magnet adjustment has good controllability. When the medium is oil, the active magnet adjustment is hydraulic magnet adjustment, and the passive magnet adjustment relies on centrifugal force. The working mode of the active magnet adjustment is to adjust the magnet guide 31 to a preset position through the medium pressure, and then the pressure is kept. During the active magnet adjustment, the shaft flow path 70, the rotor flow path 20, and the magnet adjustment flow path 30 form a closed cavity, and the medium passes through the closed cavity to adjust the position of the magnet guide 31 on the rotor 2, so as to realize real-time magnet adjustment.

[0131] In some embodiments of the present application, as shown in FIGS. 4-6 and 11-12, the rotor 2 includes a plurality of rotor laminations 21, the plurality of rotor laminations 21 are stacked in the axial direction, the rotor lamination 21 is provided with a magnet adjustment groove 212 and a flow path groove, the magnet adjustment groove 212 and the flow path groove both pass through the rotor lamination 21 in the thickness direction of the rotor lamination 21, the magnet adjustment assembly 3 is installed in the magnet adjustment groove 212, the magnet adjustment assembly 3 is installed in the magnet adjustment groove 212, the flow path grooves of the plurality of rotor laminations 21 are connected to form the rotor flow path 20, and the rotor flow path 20 is connected to the magnet adjustment groove 212. Specifically, the structures of the plurality of rotor laminations 21 are the same, thereby being beneficial to saving the cost of the motor 10.

[0132] In some embodiments of the present application, as shown in FIGS. 4-6 and 11-12, the rotor lamination 21 is provided with a rotor shaft hole 211, the rotor shaft hole 211 passes through the rotor lamination 21 in the thickness direction of the rotor lamination 21, and the shaft 7 is arranged in the rotor shaft hole 211. Specifically, the rotor shaft holes 211 of all the rotor laminations 21 are connected in the axial direction, thereby forming a hollow structure at the middle position of the rotor 2, and when the rotor 2 is installed on the shaft 7, the shaft 7 is arranged in the hollow structure, that is, the shaft 7 is arranged in the rotor shaft holes 211 of all the rotor laminations 21. The rotor flow path 20 connects the magnet adjustment groove 212 and the shaft flow path 70 in the radial direction and the axial direction.

[0133] In some embodiments of the present application, referring to FIGS. 1-6 and 11-12, the flow path groove includes a first flow path groove 2141 and a second flow path groove 2142, and the rotor 2 includes a plurality of core segments, each of which includes one rotor lamination 21 or a plurality of rotor laminations 21 arranged at the same angle, and at least two adjacent core segments are circumferentially staggered by a preset angle, so that the first flow path groove 2141 of one core segment and the second flow path groove 2142 of an adjacent core segment are in communication in both the axial and radial directions. That is, for each core segment, the rotor laminations 21 included in the core segment can be one or a plurality of rotor laminations 21, and when the core segment includes a plurality of rotor laminations 21, the rotor laminations 21 of the core segment are arranged at the same angle, so that the flux modulation grooves 212 of the rotor laminations 21 of the core segment are in communication in the axial direction, the rotor shaft holes 211 are in communication in the axial direction, the first flow path groove 2141 is in communication in the axial direction, and the second flow path groove 2142 is in communication in the axial direction. There are at least two adjacent core segments that are circumferentially staggered by a preset angle, so that the first flow path groove 2141 of one core segment and the second flow path groove 2142 of an adjacent core segment are in communication in both the axial and radial directions, thereby transmitting the medium at the rotor shaft hole 211 to the flux modulation groove 212 through the first flow path groove 2141 and the second flow path groove 2142 of the adjacent two core segments.

[0134] In some embodiments of the present application, referring to FIGS. 4-6 and 11-12, the rotor lamination 21 is provided with a rotor shaft hole 211 through which the rotating shaft 7 passes, the first flow path groove 2141 includes a plurality of first sub-grooves, the plurality of first sub-grooves are dispersed in the radial direction of the rotor lamination 21, the first sub-groove located at the radially innermost end is in communication with the rotor shaft hole 211, the first sub-groove located at the radially outermost end is in communication with the flux modulation groove 212, the second flow path groove 2142 is adapted to be separated from both the flux modulation groove 212 and the rotor shaft hole 211, and the second flow path groove 2142 is used to connect different first sub-grooves on adjacent core segments. In this way, the medium at the rotor shaft hole 211 can pass through the first flow path groove 2141 on the first core segment, the second flow path groove 2142 on the second core segment, and the first flow path groove 2141 on the first core segment to reach the flux modulation groove 212. In the example of FIGS. 2-6, the first flow path groove 2141 includes three first sub-grooves, and the second flow path groove 2142 includes two second sub-grooves, the first two first sub-grooves are connected by one of the second sub-grooves on the adjacent core segment, and the last two first sub-grooves are connected by the other second sub-groove on the adjacent core segment. Thus, the three first sub-grooves on one core segment are in communication in the radial direction through the two second sub-grooves on the adjacent core segment.

[0135] The motor 10 according to the embodiments of the present application can realize the communication of the rotor flow path 20 in the radial direction by circumferentially staggering the adjacent two core segments by a preset angle, without the need to add external displacement structures, which is conducive to simplifying the structure of the motor 10 and reducing costs.

[0136] In some embodiments of the present application, the first flow path groove 2141 and the second flow path groove 2142 are alternately arranged along the circumferential direction of the rotor lamination 21. In this way, when the two adjacent core segments are circumferentially staggered by a preset angle, the first flow path groove 2141 of one core segment is always in communication with the second flow path groove 2142 of the adjacent core segment.

[0137] In some embodiments of the present application, the first flow path groove 2141 and the second flow path groove 2142 are alternately arranged uniformly, and the circumferential staggered angle of the two adjacent core segments is equal to the central angle between the first flow path groove 2141 and the second flow path groove 2142. In this way, when the circumferential staggered angle of the two adjacent core segments is equal to the central angle between the first flow path groove 2141 and the second flow path groove 2142, the first flow path groove 2141 of one core segment is always in communication with the second flow path groove 2142 of the adjacent core segment.

[0138] In some embodiments of the present application, referring to FIGS. 4-6 and 11-12, the rotor lamination 21 is further provided with a magnetic steel groove 213 penetrating through the rotor lamination 21 along the thickness direction of the rotor lamination 21, and the permanent magnet 23 (also referred to as magnetic steel) is installed in the magnetic steel groove 213. The permanent magnet 23 can be a commonly used ferrite, neodymium iron boron, samarium cobalt, or other permanent magnet material. The number of magnetic steel grooves 213 is multiple, and the arrangement mode of the multiple magnetic steel grooves 213 has multiple modes. The magnetic steel groove 213 can be a square or arc-shaped magnetic steel groove, and the magnetic steel combination form of a single magnetic pole can be a single layer or 2 layers or multiple layers (more than 2 layers) in the shape of a "one" character, a single "V", a double "V", a "one+V", a "U type", a "W type", a "V+U type", etc. Of course, in another optional embodiment, the magnetic steel groove 213 can also be a blind groove.

[0139] In some embodiments of the present application, referring to FIGS. 4-6 and 11-12, the magnetic steel groove 213 is spaced apart from the magnetic adjustment groove 212, so that the magnetic adjustment assembly 3 installed in the magnetic adjustment groove 212 is spaced apart from the magnetic steel installed in the magnetic steel groove 213, and is not easy to interfere.

[0140] In some embodiments of the present application, the magnetic steel groove 213 is in communication with the magnetic adjustment groove 212. Thereby, it is beneficial to reduce the installation and disassembly difficulty of the magnetic adjustment assembly 3 in the magnetic adjustment groove 212, and it is also beneficial to reduce the installation and disassembly difficulty of the permanent magnet 23 in the magnetic steel groove 213.

[0141] In some embodiments of the present application, as shown in FIGS. 4-6 and 12, for each magnetic pole, a plurality of magnetic steels (such as permanent magnets 23) installed in the magnetic steel groove 213 are symmetrically arranged relative to the center line of the magnetic pole.

[0142] Optionally, the rotor lamination 21 is made of soft magnetic material, and common soft magnetic materials include silicon steel sheet, amorphous and nanocrystalline alloy, iron-cobalt material, and stainless steel. The rotor lamination 21 can further be provided with auxiliary slots, uneven air gaps, and slanted poles to suppress magnetic field harmonics, torque ripple, NVH, and the like.

[0143] In some embodiments of the present application, referring to FIGS. 1-3 and 13-14, the shaft flow path 70 includes a shaft cavity 71 having an inlet end and a shaft through hole 72 communicating the shaft cavity 71 with the outer circumferential surface of the shaft 7, and the shaft through hole 72 is in communication with the rotor flow path 20. The shaft cavity 71 and the shaft through hole 72 are both provided in the shaft 7. The inlet end is adapted to be connected to a medium source outside the motor 10. The medium supplied by the medium source enters the shaft flow path 70 through the inlet end, enters the rotor flow path 20 from the shaft cavity 71 through the shaft through hole 72, passes through the first flow path slot 2141 and the second flow path slot 2142 on the adjacent core segments arranged in a staggered manner, and then enters the magnetic adjusting flow path 30 to push the magnetic conducting member 31 to move to the second position. By changing the amount of medium in the shaft flow path 70, the amount of medium in the magnetic adjusting flow path 30 can be changed accordingly, so that the position of the magnetic conducting member 31 on the rotor 2 can be actively adjusted, and the active magnetic adjustment of the motor 10 can be realized.

[0144] Optionally, the shaft cavity 71 can extend in the axial direction of the shaft 7, and the shaft through hole 72 can extend in the radial direction of the shaft 7. The shapes of the shaft cavity 71 and the shaft through hole 72 can be cylindrical. Of course, the shapes of the shaft cavity 71 and the shaft through hole 72 are not limited to cylindrical, and the cross section of the shaft through hole 72 and the shaft 7 is not limited to parallel, and can have a certain angle.

[0145] In some embodiments of the present application, referring to FIGS. 1-3 and 15, the motor 10 further includes a rotor magnetic shield plate 6 for limiting the axial displacement of the rotor 2 and / or counterweighting in the rotor dynamic balancing experiment. The rotor magnetic shield plate 6 has a magnetic shielding effect, which can reduce the magnetic field leakage of the rotor 2 and also help to reduce the eddy current loss. The rotor magnetic shield plate 6 is provided at least at one axial end of the rotor 2, and the rotor 2 abuts against the rotor magnetic shield plate 6. For example, the rotor magnetic shield plate 6 is provided at both axial ends of the rotor 2, and the rotor magnetic shield plate 6 is fixed to the shaft 7. The rotor magnetic shield plate 6 is provided with a magnetic shield plate shaft hole 62 extending through the rotor magnetic shield plate 6 in the thickness direction of the rotor magnetic shield plate 6, and the shaft 7 passes through the magnetic shield plate shaft hole 62 in the axial direction. Thus, the rotor magnetic shield plate 6 is less likely to be separated from the shaft 7 in the radial direction, which is conducive to ensuring that the rotor magnetic shield plate 6 can be better fixed to the shaft 7.

[0146] In some embodiments of the present application, referring to FIGS. 1-2 and 13-14, the rotating shaft 7 has a rotating shaft flange 73, the outer diameter of the rotating shaft flange 73 is greater than the hole diameter of the magnetic shield plate shaft hole 62, so that the rotating shaft flange 73 can be used to axially limit the lower end of the rotor magnetic shield plate 6, so that the position of the rotor 2 on the rotating shaft 7 is accurate.

[0147] In some embodiments of the present application, referring to FIGS. 16-17, the rotor magnetic shield plate 6 includes a magnetic shield plate through hole 61, the magnetic shield plate through hole 61 penetrates the rotor magnetic shield plate 6 along the thickness direction of the rotor magnetic shield plate 6, and the magnetic shield plate through hole 61 is connected with the magnetic adjustment flow path 30. In this way, the medium in the magnetic adjustment flow path 30 can flow out to the outside space of the rotor 2 through the magnetic shield plate through hole 61.

[0148] In some embodiments of the present application, the magnetic shield plate through hole 61 is multiple, and the multiple magnetic shield plate through holes 61 are arranged in a circumferential direction of the rotor 2. In this way, the multiple magnetic shield plate through holes 61 facilitate the connection of the magnetic adjustment flow path 30 from multiple positions, and when the magnetic adjustment assembly 3 is multiple, the magnetic adjustment flow path 30 of each magnetic adjustment assembly 3 can be connected with the outside space of the rotor 2 through the corresponding magnetic shield plate through hole 61.

[0149] In some embodiments of the present application, referring to FIGS. 4-6 and 11, the motor 10 further includes a housing and a stator 4, the housing has a mounting cavity, and the stator 4 is mounted in the mounting cavity, and the stator 4 is arranged in a radial direction and nested with the rotor 2. Alternatively, in the example shown in FIGS. 4-6 and 11, the stator 4 can be sleeved on the radial outer side of the rotor 2; alternatively, the stator 4 can be sleeved on the radial inner side of the rotor 2; or alternatively, the stator 4 can be sleeved on both the radial inner side and the radial outer side of the rotor 2 (not shown in the figure). When the rotor 2 rotates, the rotor 2 and the stator 4 move relatively in a circumferential direction, and a magnetic field can be generated. When the magnetic conductor 31 moves relative to the rotor 2, the magnetic field between the rotor 2 and the stator 4 changes.

[0150] In some embodiments of the present application, referring to FIGS. 4-6 and 11, the stator 4 includes a stator core 41 and a stator winding 42, and the stator winding 42 is wound on the stator core 41.

[0151] In some embodiments of the present application, referring to FIGS. 1-2, one end of the rotating shaft 7 is supported on the housing through a first bearing 81, and the other end of the rotating shaft 7 is supported on the housing through a second bearing 82, which can reduce the wear between the rotating shaft 7 and the housing, so that the rotating shaft 7 rotates more smoothly and smoothly.

[0152] Alternatively, the first bearing 81 can be a deep groove ball bearing or a cylindrical roller bearing.

[0153] Alternatively, the second bearing 82 can be a deep groove ball bearing or a cylindrical roller bearing.

[0154] The motor 10 according to an embodiment of the present application comprises a shell, a stator 4 (a stator core 41, a stator winding 42), a rotor 2 (a rotor core, a permanent magnet 23), a flux adjusting assembly 3, a rotating shaft 7, a system flow path and a rotor flux barrier 6. The flux adjusting assembly 3 comprises a flux guide 31, an elastic member 32 and a flux adjusting housing 33, the flux adjusting housing 33 comprises an inlet 331 and a flux adjusting cavity 332, the flux adjusting cavity 332 accommodates the flux guide 31 and the elastic member 32; a space between the flux guide 31 and an inner wall of the flux adjusting housing 33 constitutes at least part of a flux adjusting flow path 30. The rotating shaft 7 is in a cylindrical structure, an inner end of the rotating shaft 7 is a rotating shaft cavity 71, the other end is solid, a plurality of rotating shaft through holes 72 are arranged on the rotating shaft 7, the rotating shaft through holes 72 communicate the rotating shaft cavity 71 inside the rotating shaft 7 and an outer surface of the rotating shaft 7; a rotating shaft flow path 70 comprises the axial rotating shaft cavity 71 inside the rotating shaft 7 and the radial rotating shaft through holes 72.

[0155] The rotor core is formed by laminating a plurality of rotor laminations 21 (thin sheets of soft magnetic material); the rotor laminations 21 are provided with a rotor shaft hole 211, a flux adjusting slot 212, a magnetic steel slot 213 and a flow path slot; first flow path slots 2141 and second flow path slots 2142 are alternately provided on every other pole of the rotor laminations 21; the first flow path slots 2141 comprise a plurality of first sub-slots, the plurality of first sub-slots are dispersed along the radial direction of the rotor laminations 21, the first sub-slot located at the innermost end in the radial direction communicates with the rotating shaft flow path 70, and the first sub-slot located at the outermost end in the radial direction communicates with the flux adjusting flow path 30; the rotor core is formed by laminating the rotor laminations 21 in the axial direction, the rotor core is divided into a plurality of core segments, and axially adjacent two core segments are circumferentially staggered by one rotor magnetic pole, so that the first flow path slots 2141 and the second flow path slots 2142 are alternately arranged in the axial direction of the rotor core; as viewed in the axial direction, the first flow path slots 2141 on one core segment and the second flow path slots 2142 on the adjacent other core segment have a certain overlapping area, and the plurality of first sub-slots on one core segment are radially communicated through the second flow path slots 2142 on the adjacent other core segment; the rotor flow path 20 is composed of the first flow path slots 2141 and the second flow path slots 2142 of the rotor laminations 21.

[0156] The motor 10 according to an embodiment of the present application is a rotor variable flux motor, and simultaneously has the composite flux adjusting capability of active flux adjusting (hydraulic or pneumatic) and centrifugal passive flux adjusting. In some embodiments, the flux adjusting assembly 3 comprises the flux guide 31 and the elastic member 32, when the motor 10 does not adjust the magnetic flux, the flux guide 31 is located away from the magnetic pole under the action of the elastic member 32, as shown in FIG. 5; the system flow path of the motor 10 is composed of the rotating shaft cavity 71, the rotating shaft through holes 72, the flow path slots of the rotor 2 and the flux adjusting flow path 30, and the medium (such as hydraulic oil) passes through the above flow paths in sequence.

[0157] When the motor 10 is magnetically adjusted, the hydraulic module is actuated, and the hydraulic oil flows through the system flow path. The system flow path is closed by the outer circulation oil path to form a circulation. The oil pushes the magnetic guide 31 to overcome the resistance of the elastic member 32, and the magnetic guide 31 moves along the radial direction of the rotor 2, and finally stabilizes at a position close to the magnetic pole, as shown in FIG. 6. When the magnetic guide 31 is actuated under the action of the hydraulic drive, part of the main magnetic flux is short-circuited through the magnetic guide 31. As the moving distance of the magnetic guide 31 increases, the short-circuit part gradually increases, and the magnetic flux of the motor 10 is adjusted.

[0158] The motor 10 of the present application forms a composite magnetic adjustment by "hydraulic pressure + centrifugal force", and increases the active magnetic adjustment function on the basis of passive magnetic adjustment. In addition, for the electric / hybrid vehicle 100, the "cooling + hydraulic pressure" multiplexing of the oil can be formed, without the need to increase additional mechanical energy, and the system operating point can be optimized in real time according to the working condition, thereby improving the system efficiency.

[0159] The rotor core is formed by axially stacking rotor punching sheets 21. The rotor punching sheet 21 is provided with a magnetic steel groove 213, a magnetic adjustment groove 212, and a flow path groove. The magnetic adjustment groove 212 is located on the center line of each magnetic pole and close to the rotor shaft hole 211, and extends radially. The magnetic steel groove 213, the magnetic adjustment groove 212, and the flow path groove are arranged in sequence from outside to inside along the radial direction.

[0160] The rotor core is axially divided into a plurality of core segments. Each core segment is obtained by rotating the adjacent core segments by 360° / 2 / p in the circumferential direction of the rotor 2, where p is the number of magnetic poles of the rotor 2. As viewed in the axial direction, the first flow path groove 2141 and the second flow path groove 2142 are alternately arranged under each magnetic pole, and the rotor shaft through hole 72 corresponds to the position of the first flow path groove 2141. When the motor 10 is magnetically adjusted, the hydraulic oil enters the first flow path groove 2141 through the rotor shaft through hole 72, flows into the second flow path groove 2142 through the overlapping part of the first flow path groove 2141 and the second flow path groove 2142, and alternately flows into the first flow path groove 2141 to reach the magnetic adjustment assembly 3, thereby forming oil pressure and pushing the magnetic guide 31 to overcome the elastic member 32 to move to the target position. According to the working condition, the position (i.e. the moving distance) of the magnetic guide 31 can be adjusted in real time, so as to adjust the short-circuit magnetic flux, thereby effectively adjusting the main air gap magnetic flux.

[0161] The motor 10 according to the embodiment of the present application can realize the permanent magnet magnetic field adjustment function, and has the advantages of constant torque area and constant power area. While ensuring high torque density and power density, the constant power operation area and high efficiency area are effectively widened. By providing the magnetic adjustment assembly 3, an additional magnetic adjustment degree of freedom is introduced, which is conducive to reducing the dependence of the armature direct-axis field weakening current in the medium and high speed region, and thereby reducing the risk of irreversible demagnetization of the magnetic steel.

[0162] In some embodiments of the present application, in combination with FIGS. 18-20, the rotor 2 has a plurality of magnetic poles, and the rotor 2 is provided with a magnetic adjusting assembly 3 on both sides of the q-axis of the rotor 2, wherein the q-axis is the center line between two adjacent magnetic poles. The magnetic adjusting assemblies 3 on both sides of the q-axis are symmetrical about the center line of the magnetic poles, so that the working performance of the motor 10 is better.

[0163] In some embodiments of the present application, the rotor 2 is provided with a magnetic steel slot 213 for mounting a magnetic steel, and the magnetic steel slot 213 is spaced apart from the magnetic adjusting slot 212, so that the magnetic adjusting assembly 3 mounted in the magnetic adjusting slot 212 is far away from the magnetic steel mounted in the magnetic steel slot 213 and is not easy to interfere.

[0164] In some embodiments of the present application, the rotor 2 is provided with a plurality of magnetic steel slots 213 for mounting a magnetic steel, and at least one magnetic steel slot 213 is in communication with the magnetic adjusting slot 212, so that the machining of the magnetic steel slot 213 and the magnetic adjusting slot 212 is facilitated.

[0165] Referring to FIGS. 18-21, the rotor core is formed by axially stacking rotor laminations 21, the rotor laminations 21 are provided with a magnetic steel slot 213, a magnetic adjusting slot 212 and a flow channel slot, the magnetic adjusting slot 212 and the flow channel slot are symmetrically distributed on both sides of each magnetic pole, and the magnetic steel slot 213, the magnetic adjusting slot 212 and the flow channel slot on both sides of the magnetic pole are arranged in sequence from outside to inside along the radial direction.

[0166] In some embodiments of the present application, in combination with FIGS. 22-24, the rotor 2 has a plurality of magnetic poles, and the magnetic adjusting assembly 3 is arranged across the center line m of the magnetic pole.

[0167] In some embodiments of the present application, each pair of magnetic poles includes a positive pole and a negative pole, as shown in FIGS. 23-24, a pair of magnetic poles, the q-axis is the center line between the positive pole and the negative pole, and the magnetic adjusting assembly 3 is arranged on both sides of the q-axis.

[0168] In some embodiments of the present application, the elastic member 32 can have a first state, in the first state, the magnetic adjusting flow channel 30 has a first medium amount, so that the magnetic conducting member 31 is in a first position; the elastic member 32 can have a second state, in the second state, the magnetic adjusting flow channel 30 has a second medium amount, so that the magnetic conducting member 31 is in a second position; the elastic member 32 can have a third state, in the third state, the magnetic adjusting flow channel 30 has a third medium amount, so that the magnetic conducting member 31 is in a third position; the first position, the second position and the third position are arranged from near to far relative to the magnetic poles of the rotor 2, and the second position is located between the first position and the third position. The lengths of the elastic member 32 in the first state, the second state and the third state are different.

[0169] Optionally, the elastic member 32 is adapted to apply an elastic force to the magnetic conducting member 31 to move the magnetic conducting member 31 to the first position, the medium in the magnetic adjusting flow path 30 is used to push the magnetic conducting member 31 to move to the third position, and / or the medium in the magnetic adjusting flow path 30 is used to keep the magnetic conducting member 31 at the target position. That is, when the rotor 2 does not rotate, the magnetic conducting member 31 is kept at the first position under the elastic force of the elastic member 32, when the medium in the magnetic adjusting flow path 30 increases to cause the thrust to increase, the magnetic conducting member 31 can be pushed to move to the third position, and by reasonably controlling the medium in the magnetic adjusting flow path 30, the magnetic conducting member 31 can also be kept at the target position, wherein the target position can be the first position or the third position or any intermediate position between the first position and the third position.

[0170] In some embodiments, as shown in FIGS. 18-21 and 30-31, when the rotor 2 rotates, the magnetic conducting member 31 moves to the radial outside under the centrifugal force, and under the action of the centrifugal force, the elastic force and the hydraulic pressure, the magnetic conducting member 31 moves to the target position, and when the rotor 2 stops rotating, the restoring force of the elastic member 32 makes the magnetic conducting member 31 return to the first position.

[0171] Optionally, the first position is located radially inward of the third position; or optionally, the third position is located radially inward of the first position. In some embodiments shown in FIGS. 18-20 and 30-31, the first position is located radially inward of the third position, that is, the first position is the position of the magnetic adjusting groove 212 close to the radial inner end, the third position is the position of the magnetic adjusting groove 212 close to the radial outer end, and the second position is located between the first position and the third position. In this way, when the rotor 2 does not rotate, the magnetic conducting member 31 is kept at the position of the magnetic adjusting groove 212 close to the radial inner end under the elastic force of the elastic member 32, as shown in FIG. 19; when the medium in the magnetic adjusting flow path 30 increases to cause the thrust to increase, the magnetic conducting member 31 can be pushed to move to the position of the magnetic adjusting groove 212 close to the radial outer end, as shown in FIGS. 20 and 30-31, and by reasonably controlling the medium in the magnetic adjusting flow path 30, the magnetic conducting member 31 can also be kept at the position of the magnetic adjusting groove 212 close to the radial outer end. In the embodiments shown in FIGS. 18-20 and 30-31, the length of the elastic member 32 in the first state < the length of the elastic member 32 in the second state < the length of the elastic member 32 in the third state.

[0172] As shown in FIGS. 18-21 and 30-31, when the rotor 2 rotates, the elastic force of the elastic member 32 on the magnetic conducting member 31 changes under the action of the centrifugal force. For example, when the first position is located radially inward of the third position, after the rotor 2 rotates, the elastic force of the elastic member 32 on the magnetic conducting member 31 decreases, and the magnetic conducting member 31 can move to the radial outside, so that the elastic member 32 can passively adjust the position of the magnetic conducting member 31 on the rotor 2.

[0173] In some embodiments, referring to Figs. 22-25, under the action of centrifugal force, the magnetic conducting piece 31 moves to the circumferential direction of the rotation direction of the rotor 2, under the action of centrifugal force, elastic force and hydraulic pressure, the magnetic conducting piece 31 moves to the target position, under the action of the restoring force of the elastic piece 32, the magnetic conducting piece 31 returns to the first position when the rotor 2 stops rotating.

[0174] In the circumferential direction of the rotor 2, the first position is located on the circumferential side of the third position. In some embodiments shown in Figs. 22-24, the first position is located on the circumferential left side of the third position, that is, the first position is the position of the magnetic adjusting groove 212 close to the circumferential left end, and the third position is the position of the magnetic adjusting groove 212 close to the circumferential right end. In this way, when the rotor 2 does not rotate, the magnetic conducting piece 31 is kept in the position close to the circumferential left end of the magnetic adjusting groove 212 under the action of the elastic force of the elastic piece 32, as shown in Fig. 23; when the medium mass in the magnetic adjusting flow path 30 increases to cause the thrust to increase, the magnetic conducting piece 31 can be pushed to move to the position close to the circumferential right end of the magnetic adjusting groove 212, as shown in Fig. 24, and by reasonably controlling the medium mass in the magnetic adjusting flow path 30, the magnetic conducting piece 31 can also be kept in the position close to the circumferential right end of the magnetic adjusting groove 212.

[0175] Referring to Figs. 22-25, when the rotor 2 rotates, the elastic force of the elastic piece 32 on the magnetic conducting piece 31 changes under the action of centrifugal force, for example, when the first position is located on the circumferential left side of the third position, after the rotor 2 rotates, the elastic force of the elastic piece 32 on the magnetic conducting piece 31 decreases, and the magnetic conducting piece 31 can move to the circumferential right side, thereby the elastic piece 32 passively adjusts the position of the magnetic conducting piece 31 on the rotor 2.

[0176] In Fig. 10, the first position is the right position in the magnetic adjusting cavity 332, the third position is the left position in the magnetic adjusting cavity 332, and the elastic piece 32 is a spring, which makes the magnetic conducting piece 31 have a tendency to move to the right. When the medium mass in the magnetic adjusting flow path 30 increases to cause the thrust to increase, the magnetic conducting piece 31 can be pushed to move to the left, thereby changing the position of the magnetic conducting piece 31 on the rotor 2 to change the magnetic field between the rotor 2 and the radial stator 4.

[0177] In some embodiments of the present application, in combination with Figs. 22-24 and 25, for each magnetic pole, a plurality of magnetic steel grooves 213 can be arranged symmetrically relative to the center line m of the magnetic pole.

[0178] In some embodiments, referring to Figs. 22-25, the magnetic adjusting assembly 3 comprises a magnetic conducting piece 31 and an elastic piece 32. When the motor 10 does not adjust the magnetic flux, the magnetic conducting piece 31 is located at one side of the magnetic pole under the action of the elastic piece 32, deviating from the center line m of the magnetic pole, as shown in Fig. 23. The system flow path of the motor 10 is composed of the shaft cavity 71, the shaft through hole 72, the flow path slot of the rotor 2 and the magnetic adjusting flow path 30, and the medium (such as hydraulic oil) passes through the above flow path in sequence.

[0179] When the motor 10 adjusts the magnetic flux, the hydraulic module acts, and the hydraulic oil passes through the system flow path. The system flow path is closed to form a circulation by the outer circulation oil path, and the oil drives the magnetic conducting piece 31 to act against the resistance of the elastic piece 32. The magnetic conducting piece 31 moves along the circumference of the rotor 2 and finally stabilizes in the middle of the magnetic pole. At this time, the magnetic conducting piece 31 is symmetrical along the center line m of the magnetic pole, as shown in Fig. 24. When the magnetic conducting piece 31 acts under the action of the hydraulic drive, part of the main magnetic flux is short-circuited through the magnetic conducting piece 31. As the moving distance of the magnetic conducting piece 31 increases, the short-circuit part gradually increases, realizing the variable magnetic flux of the motor 10.

[0180] Referring to Figs. 22-25, the rotor core is formed by axially stacking the rotor punching sheet 21. The rotor punching sheet 21 is provided with a magnetic steel groove 213, a magnetic adjusting groove 212 and a flow path slot. The magnetic adjusting groove 212 is located below each magnetic pole and close to the rotor shaft hole 211, and extends to one side of the circumference. The flow path slot is offset to one side of the magnetic pole. The magnetic steel groove 213, the magnetic adjusting groove 212 and the flow path slot are arranged in sequence from outside to inside along the radial direction.

[0181] In some embodiments, referring to Figs. 26-34, the rotor magnetic shield plate 6 has a magnetic shield plate flow path 60, and the magnetic adjusting assembly 3 is arranged on the rotor 2. The magnetic adjusting assembly 3 has a magnetic adjusting flow path 30, which can be connected with the magnetic shield plate flow path 60 to adjust the relative position of the magnetic adjusting assembly 3 and the magnetic pole of the rotor 2. Specifically, the medium in the magnetic adjusting flow path 30 can be used to adjust the relative position of the magnetic adjusting assembly 3 and the magnetic pole of the rotor 2.

[0182] Optionally, the rotor magnetic shield plate 6 can also be used to limit the axial displacement of the magnetic adjusting assembly 3.

[0183] The rotor magnetic shield plate 6 is fixed to the rotating shaft 7. The rotor magnetic shield plate 6 is provided with a magnetic shield plate shaft hole 62 penetrating through the rotor magnetic shield plate 6 along the thickness direction of the rotor magnetic shield plate 6. The rotating shaft 7 penetrates the magnetic shield plate shaft hole 62 along the axial direction. Therefore, the rotor magnetic shield plate 6 is not easy to be separated from the rotating shaft 7 in the radial direction, which is conducive to ensuring that the rotor magnetic shield plate 6 can be better fixed to the rotating shaft 7.

[0184] The magnetic isolation plate flow path 60 and the magnetic adjustment flow path 30 constitute at least part of a system flow path for conveying the medium to the position of the magnetic conducting member 31 to drive the magnetic conducting member 31 to move, thereby actively adjusting the position of the magnetic conducting member 31 and actively adjusting the magnetic field. The medium flow direction of the system flow path is shown by arrows in FIG. 26 and FIG. 28.

[0185] In some embodiments, the rotating shaft 7 has a rotating shaft flow path 70, and the rotating shaft flow path 70, the magnetic isolation plate flow path 60 and the magnetic adjustment flow path 30 constitute the system flow path.

[0186] The rotating shaft flow path 70 can be directly connected to a medium source outside the motor 10 or connected to the medium source through a connecting pipe. After the medium from the medium source enters the rotating shaft flow path 70, it further enters the magnetic adjustment flow path 30 through the magnetic isolation plate flow path 60. By changing the amount of medium in the magnetic adjustment flow path 30, the position of the magnetic conducting member 31 on the rotor 2 can be actively adjusted. When the position of the magnetic conducting member 31 on the rotor 2 changes, the original magnetic conducting performance of the rotor 2 is changed, which changes the magnetic field between the rotor 2 and the stator 4, thereby effectively adjusting the working magnetic field of the motor 10.

[0187] In other embodiments, the rotating shaft 7 can also not be provided with a rotating shaft flow path 70, and oil is directly fed from the end of the rotor magnetic isolation plate 6 into the magnetic isolation plate flow path 60, and then the oil enters the magnetic adjustment flow path 30.

[0188] In addition to serving as the power for moving the magnetic conducting member 31, the medium can also provide certain heat dissipation for the rotating shaft 7 and the rotor magnetic isolation plate 6, so that the temperature of the motor 10 during operation is not too high, which is beneficial to improve the service life of the motor 10.

[0189] In some embodiments of the present application, the rotor magnetic isolation plate 6 is arranged at least at one end of the rotor 2 in the axial direction, and the rotor 2 abuts against the rotor magnetic isolation plate 6. In this way, the rotor magnetic isolation plate 6 can axially limit the rotor 2, and the rotor 2 abutting against the rotor magnetic isolation plate 6 makes the connection between the magnetic isolation plate flow path 60 and the magnetic adjustment flow path 30 not easy to leak.

[0190] In some embodiments of the present application, the rotor magnetic isolation plate 6 includes a magnetic isolation plate first side and a magnetic isolation plate second side, the magnetic isolation plate first side and the magnetic isolation plate second side are oppositely arranged, the magnetic isolation plate first side faces the rotor 2, and the magnetic isolation plate second side faces away from the rotor 2. The magnetic isolation plate flow path 60 includes a recessed groove 63 arranged on the magnetic isolation plate first side, and the recessed groove 63 communicates with the magnetic adjustment flow path 30. In this way, the recessed groove 63 can guide the medium to flow into the magnetic adjustment flow path 30, and the medium at the magnetic adjustment flow path 30 can also flow back through the recessed groove 63.

[0191] In some embodiments, the shaft 7 has a shaft flow path 70, and the recessed groove 63 connects the shaft flow path 70 and the magnetic adjustment flow path 30, so that the medium at the shaft flow path 70 can be guided into the magnetic adjustment flow path 30 through the recessed groove 63, and the medium at the magnetic adjustment flow path 30 can also flow back into the shaft flow path 70 through the recessed groove 63.

[0192] In some embodiments of the present application, referring to FIGS. 27 and 29, the recessed groove 63 is a plurality of recessed grooves 63, which are arranged in a circumferential direction of the rotor magnetic shield plate 6 and extend in a radial direction of the rotor magnetic shield plate 6. When the shaft 7 has a shaft flow path 70, the plurality of recessed grooves 63 facilitate the connection between the shaft flow path 70 and the magnetic adjustment flow path 30 from multiple positions, and when the magnetic adjustment assembly 3 is a plurality of magnetic adjustment assemblies 3, the magnetic adjustment flow path 30 of each magnetic adjustment assembly 3 can be connected to the shaft flow path 70 through the corresponding recessed groove 63.

[0193] In some embodiments of the present application, referring to FIGS. 26-27, the system flow path is closed, and the medium in the shaft flow path 70 enters the recessed groove 63 of the rotor magnetic shield plate 6 at the axial ends of the rotor 2, and then enters the magnetic adjustment flow path 30 through the recessed groove 63. That is, the rotor magnetic shield plate 6 at the axial ends of the rotor 2 can simultaneously realize the flow guiding effect and guide the medium in the shaft flow path 70 to the magnetic adjustment flow path 30. The working mode of the hydraulic active magnetic adjustment can be to adjust the magnetic guide 31 to the target position by oil pressure, and then keep the pressure to keep the magnetic guide 31 at the target position.

[0194] In some embodiments of the present application, referring to FIGS. 26 and 28, the rotor 2 is provided with a rotor magnetic shield plate 6 at each axial end, and the rotor 2 abuts against the rotor magnetic shield plate 6 at the corresponding end.

[0195] In some embodiments of the present application, as shown in FIG. 26, the recessed groove 63 of the rotor magnetic shield plate 6 at one end of the rotor 2 is connected to the recessed groove 63 of the rotor magnetic shield plate 6 at the other end of the rotor 2 through the magnetic adjustment flow path 30. Referring to FIG. 30, taking the rotor 2 with 16 magnetic adjustment assemblies 3 as an example, the number of recessed grooves 63 on the rotor magnetic shield plate 6 at each end of the rotor 2 is 16, so that the rotor magnetic shield plates 6 at the axial ends of the rotor 2 are arranged at the same angle, so that the recessed grooves 63 on the rotor magnetic shield plates 6 at the axial ends of the rotor 2 are connected through the axially arranged magnetic adjustment flow path 30.

[0196] In some embodiments of the present application, the rotor isolation plate 6 at one end of the rotor 2 is circumferentially staggered by a preset angle from the rotor isolation plate 6 at the other end of the rotor 2, so that the recessed groove 63 of the rotor isolation plate 6 at one end of the rotor 2 is in communication with the corresponding magnetic adjustment flow path 30, and the recessed groove 63 of the rotor isolation plate 6 at the other end of the rotor 2 is in communication with the corresponding magnetic adjustment flow path 30. Referring to FIGS. 27 and 30, taking the rotor 2 having 16 magnetic adjustment assemblies 3 as an example, the number of recessed grooves 63 on the rotor isolation plate 6 at each end of the rotor 2 is 8, so that the rotor isolation plate 6 at the two axial ends of the rotor 2 is circumferentially staggered by 22.5°, so that the 8 recessed grooves 63 on the rotor isolation plate 6 at one end of the rotor 2 are in communication with the magnetic adjustment flow path 30 of 8 magnetic adjustment assemblies 3, and the 8 recessed grooves 63 on the rotor isolation plate 6 at the other end of the rotor 2 are in communication with the magnetic adjustment flow path 30 of the other 8 magnetic adjustment assemblies 3.

[0197] In some embodiments of the present application, referring to FIGS. 28-29, the isolation plate flow path 60 further comprises an isolation plate through hole 61, the isolation plate through hole 61 penetrates the rotor isolation plate 6 along the thickness direction of the rotor isolation plate 6, and the magnetic adjustment flow path 30 is in communication with the isolation plate through hole 61. In this way, the medium in the magnetic adjustment flow path 30 can flow out to the outside space of the rotor 2 through the isolation plate through hole 61, i.e., flow out to the mounting cavity of the shell through the isolation plate through hole 61.

[0198] In some embodiments of the present application, the isolation plate through hole 61 is a plurality of isolation plate through holes 61, and the plurality of isolation plate through holes 61 are dispersedly arranged along the circumference of the rotor 2. In this way, the plurality of isolation plate through holes 61 facilitate the communication of the magnetic adjustment flow path 30 from multiple positions, and when the magnetic adjustment assembly 3 is a plurality of magnetic adjustment assemblies 3, the magnetic adjustment flow path 30 of each magnetic adjustment assembly 3 can be communicated with the outside space of the rotor 2 (i.e., the mounting cavity of the shell) through the corresponding isolation plate through hole 61.

[0199] In some embodiments of the present application, the recessed groove 63 is a plurality of recessed grooves 63, and the isolation plate through hole 61 and the recessed groove 63 are alternately arranged along the circumference of the rotor 2. The isolation plate through hole 61 is in communication with the magnetic adjustment flow path 30 at one position, and the recessed groove 63 is in communication with the magnetic adjustment flow path 30 at another position.

[0200] In some embodiments of the present application, referring to FIG. 28-29, the rotor spacer plates 6 at both ends of the rotor 2 are of the same structure, the rotor spacer plate 6 at one end of the rotor 2 is circumferentially staggered by a preset angle from the rotor spacer plate 6 at the other end of the rotor 2, so that the recessed groove 63 of the rotor spacer plate 6 at one end of the rotor 2 is connected to the spacer plate through hole 61 of the rotor spacer plate 6 at the other end of the rotor 2 through the magnetic flux adjusting flow path 30. In the embodiments shown in FIG. 28-29, the system flow path is of a circulation type, for example, at the cross-sectional position shown in FIG. 28, the medium in the shaft flow path 70 enters the recessed groove 63 of the rotor spacer plate 6 at the upper end of the rotor 2, and then enters the magnetic flux adjusting flow path 30 through the upper end recessed groove 63, and the medium in the magnetic flux adjusting flow path 30 further flows into the space outside the rotor 2 through the spacer plate through hole 61 of the rotor spacer plate 6 at the lower end of the rotor 2. At this time, the working mode of the hydraulic active magnetic flux adjustment can be to continuously supply oil into the shaft flow path 70, and the oil continuously flows out of the spacer plate through hole 61, so that the magnetic conducting member 31 is kept at the target position.

[0201] In some alternative embodiments, the rotor spacer plates 6 at both ends of the rotor 2 can be of different structures, for example, the rotor spacer plate 6 at one end of the rotor 2 is of the structure shown in FIG. 27, and the rotor spacer plate 6 at the other end of the rotor 2 is of the structure shown in FIG. 29.

[0202] In some alternative embodiments, the same recessed groove 63 can be connected to the magnetic flux adjusting flow path 30 of only one magnetic flux adjusting assembly 3.

[0203] In some alternative embodiments, the same recessed groove 63 can be connected to the magnetic flux adjusting flow path 30 of multiple magnetic flux adjusting assemblies 3 at the same time, for example, the number of recessed grooves 63 on the rotor spacer plate 6 is 8, and the rotor 2 has 16 magnetic flux adjusting assemblies 3, and each recessed groove 63 can be connected to the magnetic flux adjusting flow path 30 of 2 magnetic flux adjusting assemblies 3 at the same time.

[0204] In some embodiments of the present application, the oil flowing out of the spacer plate through hole 61 can be used to cool the given winding 42.

[0205] In some embodiments of the present application, referring to FIG. 26, 28, 33-34, the shaft flow path 70 includes a shaft cavity 71 and a shaft through hole 72, both of which are arranged in the shaft 7, the shaft cavity 71 has an inlet end, the shaft through hole 72 connects the shaft cavity 71 and the outer circumferential surface of the shaft 7, and the shaft through hole 72 is connected to the recessed groove 63. The inlet end is adapted to be connected to a medium source outside the motor 10. The medium supplied by the medium source enters the shaft flow path 70 through the inlet end, enters the recessed groove 63 from the shaft cavity 71 through the shaft through hole 72, and then enters the magnetic flux adjusting flow path 30, pushing the magnetic conducting member 31 to move to the second position. By changing the amount of medium in the shaft flow path 70, the amount of medium in the magnetic flux adjusting flow path 30 can be changed accordingly, so that the position of the magnetic conducting member 31 on the rotor 2 can be actively adjusted, and the active magnetic flux adjustment of the motor 10 can be realized.

[0206] Optionally, the rotation shaft cavity 71 can extend along the axial direction of the rotation shaft 7, and the rotation shaft through hole 72 can extend along the radial direction of the rotation shaft 7. The shape of the rotation shaft cavity 71 and the rotation shaft through hole 72 can be cylindrical. Of course, the shape of the rotation shaft cavity 71 and the rotation shaft through hole 72 is not limited to cylindrical, and the cross section of the rotation shaft through hole 72 and the rotation shaft 7 is not limited to parallel, and can have a certain angle.

[0207] In some embodiments of the present application, as shown in FIG. 1, FIG. 26, FIG. 28, FIG. 33-FIG. 34, the rotation shaft 7 has a rotation shaft flange 73, the outer diameter of the rotation shaft flange 73 is greater than the hole diameter of the magnetic shield plate shaft hole 62, so that the rotation shaft flange 73 can be used to axially limit the lower end rotor magnetic shield plate 6, so that the position of the rotor 2 on the rotation shaft 7 is accurate.

[0208] In some embodiments of the present application, as shown in FIG. 30-FIG. 32, the rotor 2 has a plurality of magnetic poles, and each magnetic pole of the rotor 2 is provided with a magnetic adjustment groove 212, and each magnetic adjustment groove 212 is provided with a magnetic adjustment assembly 3, and the number of recess grooves 63 is equal to the number of poles of the rotor 2. The recess groove 63 communicates with the magnetic adjustment groove 212 on each magnetic pole, and the recess groove 63 also communicates with the rotation shaft through hole 72, so that the recess groove 63 can guide the medium in the rotation shaft flow path 70 to the corresponding magnetic adjustment groove 212 to push the magnetic guide 31 at this position to move, realizing real-time magnetic adjustment.

[0209] In some optional embodiments, the same recess groove 63 can only communicate with one magnetic adjustment groove 212.

[0210] In another optional embodiment, the same recess groove 63 can simultaneously communicate with a plurality of magnetic adjustment grooves 212, for example, the number of recess grooves 63 on the rotor magnetic shield plate 6 is 8, and the rotor 2 has 16 magnetic adjustment grooves 212, and each recess groove 63 can simultaneously communicate with two magnetic adjustment grooves 212.

[0211] In some embodiments of the present application, as shown in FIG. 30-FIG. 32, the rotor 2 includes a plurality of rotor laminations 21, the plurality of rotor laminations 21 are stacked along the axial direction, the rotor lamination 21 is provided with a magnetic adjustment groove 212 and a magnetic steel groove 213, the magnetic adjustment groove 212 and the magnetic steel groove 213 both penetrate the rotor lamination 21 along the thickness direction of the rotor lamination 21, the magnetic adjustment assembly 3 is installed in the magnetic adjustment groove 212, and the magnetic steel groove 213 is used to install the magnetic steel.

[0212] In some embodiments of the present application, as shown in FIG. 30-FIG. 32, the rotor lamination 21 is provided with a rotor shaft hole 211, the rotor shaft hole 211 penetrates the rotor lamination 21 along the thickness direction of the rotor lamination 21, and the rotation shaft 7 is arranged in the rotor shaft hole 211.

[0213] When the active magnetic adjustment is performed, the shaft flow path 70, the magnetic shield flow path 60, and the magnetic adjustment flow path 30 form a closed cavity, and the medium passes through the closed cavity to adjust the position of the magnetic guide block 31 on the rotor 2, so as to realize real-time magnetic adjustment.

[0214] The magnetic adjustment shell 33 is provided with an inlet 331, and the magnetic adjustment flow path 30 and the magnetic shield flow path 60 are connected through the inlet 331.

[0215] In some embodiments of the present application, as shown in FIG. 31, the rotor 2 includes a plurality of magnetic poles, the magnetic adjustment assembly 3 is symmetrical relative to the center line of the magnetic poles, and the magnetic adjustment assembly 3 is located on the circumferential outer side of the magnetic poles. The magnetic steel groove 213 is symmetrically arranged about the center line of the magnetic poles, and the magnetic adjustment groove 212 on each magnetic pole is symmetrical relative to the center line of the magnetic pole and located on the circumferential outer side of the magnetic steel groove 213. That is, the magnetic adjustment groove 212 on each magnetic pole is symmetrical relative to the center line of the magnetic pole, and the magnetic adjustment groove 212 on each magnetic pole is located on the circumferential outer side of the magnetic steel groove 213, thereby facilitating the symmetry of the magnetic field of the motor 10.

[0216] In some embodiments, as shown in FIGS. 26-34, the magnetic adjustment assembly 3 includes the magnetic guide block 31 and the elastic member 32. When the motor 10 does not adjust the magnetic flux, the magnetic guide block 31 is located at a position close to the rotor shaft hole 211 in the radial direction under the action of the elastic member 32. The system flow path of the motor 10 is composed of the shaft cavity 71, the shaft through hole 72, the recessed groove 63 of the rotor magnetic shield 6 (or the recessed groove 63 and the magnetic shield through hole 61), and the magnetic adjustment flow path 30, and the medium (such as hydraulic oil) passes through the above flow path in sequence.

[0217] When the motor 10 adjusts the magnetic field, the hydraulic module is actuated, the hydraulic oil passes through the system flow path, the system flow path is closed by the outer circulation oil path to form a circulation, and the oil pushes the magnetic guide block 31 to act against the resistance of the elastic member 32. The magnetic guide block 31 moves in the radial direction to the outer circular direction of the rotor 2. When the magnetic guide block 31 is actuated under the action of the hydraulic drive, part of the main magnetic flux is short-circuited through the magnetic guide block 31, and as the moving distance of the magnetic guide block 31 increases, the short-circuit part gradually increases, thereby realizing the variable magnetic flux of the motor 10.

[0218] The rotor core is formed by axially stacking the rotor punching sheet 21, and the rotor punching sheet 21 is provided with the magnetic steel groove 213 and the magnetic adjustment groove 212. The magnetic adjustment groove 212 is symmetrically distributed on both sides of each magnetic pole, and the magnetic steel groove 213 is located between a pair of magnetic adjustment grooves 212. The rotor magnetic shield 6 is axially symmetrically arranged at both axial ends of the rotor 2, and the side of the rotor magnetic shield 6 close to the rotor 2 is provided with the recessed groove 63. The radial inner end of the recessed groove 63 is in communication with the magnetic adjustment groove 212, and the radial outer end of the recessed groove 63 is in communication with the shaft through hole 72.

[0219] When the motor 10 is magnetically adjusted, the hydraulic oil enters the recessed groove 63 of the rotor magnetic isolation plate 6 through the shaft through hole 72, and then enters the magnetic adjustment groove 212 through the recessed groove 63 to form oil pressure, which pushes the magnetic block 31 to overcome the elastic force of the elastic element 32 to the target position. According to the working condition, the position (i.e. the moving distance) of the magnetic block 31 is adjusted in real time, so that the adjustment of the short-circuit magnetic flux is realized, thereby realizing the effective adjustment of the main air gap magnetic flux.

[0220] Referring to FIG. 35, the electric drive system 90 according to another aspect of the present application includes the motor 10 of the above-described embodiment. Alternatively, the electric drive system 90 can be a suspension system, a braking system or other system requiring the use of the motor 10, etc.

[0221] The electric drive system 90 according to the embodiment of the present application actively adjusts the relative distance between the magnetic pole of the magnetic adjustment assembly 3 and the rotor 2, thereby realizing the effective adjustment of the working magnetic field of the motor, and has good controllability and low space requirement for the motor.

[0222] Referring to FIG. 36, the vehicle 100 according to still another aspect of the present application includes the electric drive system 90 of the above-described embodiment.

[0223] The vehicle 100 according to the embodiment of the present application actively adjusts the relative distance between the magnetic pole of the magnetic adjustment assembly 3 and the rotor 2 by adjusting the medium in the magnetic adjustment flow path 30 of the motor 10 of the electric drive system 90, thereby realizing the effective adjustment of the working magnetic field of the motor 10, and has good controllability and low space requirement for the motor 10.

[0224] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0225] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0226] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the specification.

[0227] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A magnetic adjustment assembly (3), wherein, The magnetic adjusting assembly (3) comprises: a magnetic conducting member (31) adapted to be arranged on the rotor (2); and a magnetic adjusting flow path (30) arranged corresponding to the magnetic conducting member (31), and the amount of medium in the magnetic adjusting flow path (30) is adjustable to make the magnetic conducting member (31) approach or move away from the magnetic pole of the rotor (2).

2. The magnetic field adjusting assembly (3) according to claim 1, wherein The magnetic conducting member (31) can reciprocate along the radial direction of the rotor (2).

3. The magnetic field adjustment assembly (3) according to claim 1 or 2, wherein The magnetic conducting member (31) can reciprocate along the circumferential direction of the rotor (2), and / or The magnetic conducting member (31) can reciprocate along the axial direction of the rotor (2).

4. The magnetic adjustment assembly (3) according to any one of claims 1-3, wherein, The magnetic adjusting assembly (3) further comprises an elastic member (32), one end of the elastic member (32) is connected to the magnetic conducting member (31), and the other end of the elastic member (32) is fixed relative to the rotor (2).

5. The magnetic adjusting assembly (3) according to claim 4, wherein The elastic member (32) can have a first state, in which the magnetic adjusting flow path (30) has a first amount of medium to make the magnetic conducting member (31) be in a first position away from the magnetic pole of the rotor (2); The elastic member (32) can have a second state, in which the magnetic adjusting flow path (30) has a second amount of medium to make the magnetic conducting member (31) be in a second position close to the magnetic pole of the rotor (2).

6. The magnetic adjusting assembly (3) according to claim 4, wherein The elastic member (32) can have a first state, in which the magnetic adjusting flow path (30) has a first amount of medium to make the magnetic conducting member (31) be in a first position; The elastic member (32) can have a second state, in which the magnetic adjusting flow path (30) has a second amount of medium to make the magnetic conducting member (31) be in a second position; The elastic member (32) can have a third state, in which the magnetic adjusting flow path (30) has a third amount of medium to make the magnetic conducting member (31) be in a third position; The first position, the second position and the third position are from close to far relative to the magnetic pole of the rotor (2).

7. The magnetic adjustment assembly (3) according to any one of claims 4-6, wherein Each of the magnetic conducting members (31) is correspondingly provided with a plurality of elastic members (32), and the plurality of elastic members (32) are connected to the magnetic conducting member (31) in the axial direction of the rotor (2).

8. The magnetic adjustment assembly (3) according to any one of claims 4-7, wherein, The magnetic adjusting assembly (3) further comprises a magnetic adjusting housing (33), one end of the elastic member (32) is connected to the magnetic conducting member (31), and the other end of the elastic member (32) is connected to the magnetic adjusting housing (33).

9. The magnetic field adjusting assembly (3) according to claim 8, wherein The magnetic adjusting housing (33) has a magnetic adjusting cavity (332) therein, the magnetic adjusting flow path (30) is formed in the magnetic adjusting housing (33), the magnetic adjusting housing (33) is provided with an inlet (331), the magnetic conducting member (31) is arranged in the magnetic adjusting cavity (332), and the magnetic conducting member (31) can reciprocate in the magnetic adjusting cavity (332).

10. An electric machine (10), wherein Comprise: a rotor (2); and ​ The magnet adjusting assembly (3) according to any one of claims 1-9 is arranged on the rotor (2).

11. The electric machine (10) of claim 10, wherein, The rotor (2) is provided with a magnet adjusting groove (212), and the magnet adjusting assembly (3) is arranged in the magnet adjusting groove (212).

12. The electric machine (10) of claim 11, wherein, The rotor (2) is provided with a magnet steel groove (213) for mounting a magnet steel, and the magnet steel groove (213) is spaced apart from the magnet adjusting groove (212).

13. The electric machine (10) of claim 11, wherein, The rotor (2) is provided with a magnet steel groove (213) for mounting a magnet steel, and the magnet steel groove (213) is in communication with the magnet adjusting groove (212).

14. The electric machine (10) according to any one of claims 10-13, wherein, The rotor (2) has a plurality of magnetic poles, and the magnet adjusting assembly (3) is arranged on the center line of the magnetic poles, or the magnet adjusting assembly (3) is arranged on the center line between two adjacent magnetic poles.

15. The electric machine (10) according to any one of claims 11-14, wherein, The rotor (2) has a rotor flow path (20), and the magnet adjusting flow path (30) is in communication with the rotor flow path (20).

16. The electric machine (10) of claim 15, wherein, The motor (10) further comprises a rotating shaft (7) having a rotating shaft flow path (70), and the rotor (2) is mounted on the rotating shaft (7), and the rotating shaft flow path (70) and the magnet adjusting flow path (30) are in communication through the rotor flow path (20).

17. The electric machine (10) of claim 16, wherein, The rotating shaft flow path (70) comprises a rotating shaft cavity (71) arranged in the rotating shaft (7) and a rotating shaft through hole (72), the rotating shaft cavity (71) has an inlet end, the rotating shaft through hole (72) is in communication with the rotating shaft cavity (71) and the outer circumferential surface of the rotating shaft (7), and the rotating shaft through hole (72) is in communication with the rotor flow path (20).

18. The electric machine (10) according to any one of claims 10-17, wherein, The rotor (2) comprises a plurality of rotor laminations (21) stacked in the axial direction, the rotor laminations (21) are provided with a magnet adjusting groove (212) and a flow path groove, the magnet adjusting groove (212) and the flow path groove both penetrate the rotor laminations (21) in the thickness direction of the rotor laminations (21), the magnet adjusting assembly (3) is mounted in the magnet adjusting groove (212), and the flow path grooves of the plurality of rotor laminations (21) are in communication to form a rotor flow path (20), and the rotor flow path (20) is in communication with the magnet adjusting groove (212).

19. The electric machine (10) of claim 18, wherein, The flow path groove comprises a first flow path groove (2141) and a second flow path groove (2142), the rotor (2) comprises a plurality of core segments, each core segment comprises one rotor lamination (21) or a plurality of rotor laminations (21) arranged at the same angle, and at least two adjacent core segments are staggered by a preset angle in the circumferential direction, so that the first flow path groove (2141) of one core segment is in communication with the second flow path groove (2142) of the adjacent core segment in the axial and radial directions.

20. The electric machine (10) of claim 19, wherein, The rotor lamination (21) is provided with a rotor shaft hole (211) through which a rotating shaft (7) passes, the first flow path groove (2141) includes a plurality of first sub-grooves which are dispersed along the radial direction of the rotor lamination (21), the first sub-groove at the innermost end in the radial direction is connected to the rotor shaft hole (211), and the first sub-groove at the outermost end in the radial direction is connected to the flux modulation groove (212), the second flow path groove (2142) is adapted to be separated from the flux modulation groove (212) and the rotor shaft hole (211), and the second flow path groove (2142) is used to connect the different first sub-grooves on the adjacent core segments.

21. The electric machine (10) of claim 19 or 20, wherein, The first flow path groove (2141) and the second flow path groove (2142) are alternately arranged along the circumferential direction of the rotor lamination (21).

22. The electric machine (10) of claim 21, wherein, The first flow path groove (2141) and the second flow path groove (2142) are uniformly and alternately arranged, and the preset angle is equal to the central angle between the first flow path groove (2141) and the second flow path groove (2142).

23. The electric machine (10) according to any one of claims 10-22, wherein, The motor (10) further comprises a rotor magnetic shield plate (6) arranged at least at one end of the rotor (2) in the axial direction, and the rotor (2) abuts against the rotor magnetic shield plate (6).

24. The electric machine (10) of claim 23, wherein, The rotor magnetic shield plate (6) comprises a magnetic shield plate through hole (61) penetrating the rotor magnetic shield plate (6) in the thickness direction of the rotor magnetic shield plate (6), and the flux modulation flow path (30) is connected to the magnetic shield plate through hole (61).

25. The electric machine (10) of claim 24, wherein, The magnetic shield plate through hole (61) is a plurality of magnetic shield plate through holes (61) which are dispersedly arranged along the circumferential direction of the rotor (2).

26. The electric machine (10) of claim 23, wherein, The rotor magnetic shield plate (6) has a magnetic shield plate flow path (60), and the flux modulation flow path (30) can be connected to the magnetic shield plate flow path (60) to adjust the relative position of the flux modulation assembly (3) and the magnetic pole of the rotor (2).

27. The electric machine (10) of claim 26, wherein, The rotor magnetic shield plate (6) comprises a magnetic shield plate first side surface facing the rotor (2) and a magnetic shield plate second side surface facing away from the rotor (2), the magnetic shield plate flow path (60) comprises a recessed groove (63) arranged on the magnetic shield plate first side surface, and the recessed groove (63) is connected to the flux modulation flow path (30).

28. The electric machine (10) of claim 27, wherein, The recessed groove (63) is a plurality of recessed grooves (63) which are dispersedly arranged along the circumferential direction of the rotor magnetic shield plate (6) and extend along the radial direction of the rotor magnetic shield plate (6).

29. The electric machine (10) of claim 28, wherein, The rotor (2) is provided with the rotor magnetic shield plate (6) at both ends in the axial direction, and the rotor (2) abuts against the rotor magnetic shield plate (6) at the corresponding end.

30. The electric machine (10) of claim 29, wherein, The recessed groove (63) of the rotor magnetic shield plate (6) at one end of the rotor (2) is connected to the recessed groove (63) of the rotor magnetic shield plate (6) at the other end of the rotor (2) through the flux modulation flow path (30).

31. The electric machine (10) of claim 29, wherein, The rotor isolation plate flow path (60) further comprises an isolation plate through hole (61) penetrating the rotor isolation plate (6) along the thickness direction of the rotor isolation plate (6), and the magnetic adjustment flow path (30) is in communication with the isolation plate through hole (61).

32. The electric machine (10) of claim 29, wherein, The rotor isolation plate flow path (60) further comprises an isolation plate through hole (61) penetrating the rotor isolation plate (6) along the thickness direction of the rotor isolation plate (6), and the magnetic adjustment flow path (30) is in communication with the isolation plate through hole (61).

33. The electric machine (10) of claim 32, wherein, The rotor isolation plate flow path (60) further comprises an isolation plate through hole (61) penetrating the rotor isolation plate (6) along the thickness direction of the rotor isolation plate (6), and the magnetic adjustment flow path (30) is in communication with the isolation plate through hole (61).

34. The electric machine (10) of claim 33, wherein, The rotor isolation plate flow path (60) further comprises an isolation plate through hole (61) penetrating the rotor isolation plate (6) along the thickness direction of the rotor isolation plate (6), and the magnetic adjustment flow path (30) is in communication with the isolation plate through hole (61).

35. The electric machine (10) of claim 34, wherein, The rotor isolation plate flow path (60) further comprises an isolation plate through hole (61) penetrating the rotor isolation plate (6) along the thickness direction of the rotor isolation plate (6), and the magnetic adjustment flow path (30) is in communication with the isolation plate through hole (61).

36. The electric machine (10) of any of claims 27-35, wherein, The rotor isolation plate flow path (60) further comprises an isolation plate through hole (61) penetrating the rotor isolation plate (6) along the thickness direction of the rotor isolation plate (6), and the magnetic adjustment flow path (30) is in communication with the isolation plate through hole (61).

37. The electric machine (10) of claim 36, wherein, The motor (10) further comprises a rotating shaft (7) having a rotating shaft flow path (70), the rotor (2) is installed on the rotating shaft (7), and the recessed groove (63) further communicates with the rotating shaft flow path (70).

38. A vehicle (100), wherein The rotating shaft flow path (70) comprises a rotating shaft cavity (71) and a rotating shaft through hole (72) provided on the rotating shaft (7), the rotating shaft cavity (71) has an inlet end, the rotating shaft through hole (72) communicates the rotating shaft cavity (71) and the outer circumferential surface of the rotating shaft (7), and the rotating shaft through hole (72) is in communication with the recessed groove (63). The motor (10) comprises an electric drive system (90), and the electric drive system (90) comprises the motor (10) according to any one of claims 10-37.

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