Magnetic field adjustment assembly, electric motor, and vehicle

Abstract

A vehicle, comprising an electric drive system, the electric drive system comprising an electric motor, the electric motor comprising a magnetic field adjustment assembly and a rotor. The magnetic field adjustment assembly is adapted to be arranged on at least one end of the rotor in the axial direction, and the position of the magnetic field adjustment assembly in the circumferential direction and / or radial direction of the rotor is adjustable so as to adjust the magnetic flux passing through 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 May 31, 2024, the application number of 202410703858.8, and the patent application name of "Magnetic adjusting assembly, motor, electric drive system and vehicle", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of electric machines, in particular to a magnetic adjusting assembly, a motor and a vehicle. 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, the axial position of the magnetic yoke is adjusted through the magnetic yoke adjusting device, so as to realize the adjustment of the working magnetic field. However, axial adjustment requires additional axial movement space, which has high requirements for layout 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 proposes a magnetic adjusting assembly, which realizes effective adjustment of the working magnetic field by adjusting the circumferential position of the axial stator relative to the rotor.

[0007] The present application also proposes a motor having the above magnetic adjusting assembly.

[0008] The present application also proposes an electric drive system having the above motor.

[0009] The present application also proposes a vehicle having the above electric drive system.

[0010] The magnetic adjusting assembly according to the embodiments of the present application is suitable to be arranged at least one end of the rotor in the axial direction, the position of the magnetic adjusting assembly in the circumferential direction and / or the radial direction of the rotor is adjustable, so as to adjust the magnetic flux through the rotor.

[0011] The magnetic adjusting assembly according to the embodiments of the present application, by setting the position of the magnetic adjusting assembly in the circumferential direction and / or the radial direction of the rotor to be adjustable, the relative position of the magnetic adjusting assembly and the rotor can be adjusted, thereby realizing effective adjustment of the magnetic flux of the rotor, and further realizing effective adjustment of the working magnetic field of the motor.

[0012] According to some embodiments of the present application, the magnetic adjusting assembly comprises an axial stator and an actuating part, the actuating part is used to drive the axial stator to rotate around the circumferential direction of the rotor and / or move in the radial direction of the rotor.

[0013] According to some embodiments of the present application, the magnetic adjusting assembly further comprises a magnetic adjusting wheel, the axial stator is fixedly connected with the magnetic adjusting wheel, and the actuating component drives the magnetic adjusting wheel to rotate around the circumference to drive the axial stator to rotate around the circumference.

[0014] According to some embodiments of the present application, the axial stator comprises an axial stator core and an axial stator winding, the magnetic adjusting wheel has a stator fixing member, the axial stator core comprises a stator yoke and a stator tooth, the stator yoke and the stator tooth are fixedly connected, the stator yoke is installed on the stator fixing member, and the axial stator winding is arranged on the stator tooth.

[0015] According to some embodiments of the present application, the actuating component comprises a driving device and an actuating transmission member, the driving device is used to drive the actuating transmission member to act, and the actuating transmission member is used to drive the magnetic adjusting wheel to rotate.

[0016] According to some embodiments of the present application, the actuating transmission member is an actuating gear, the magnetic adjusting wheel is a magnetic adjusting gear, the actuating gear is engaged with the magnetic adjusting gear to drive the magnetic adjusting gear to rotate.

[0017] Or, the actuating transmission member comprises an actuating driving wheel and an actuating belt, the driving device is used to drive the actuating driving wheel to rotate, the magnetic adjusting wheel is a magnetic adjusting belt wheel, and the actuating driving wheel drives the magnetic adjusting belt wheel to rotate through the actuating belt.

[0018] According to some embodiments of the present application, the position of the magnetic adjusting assembly in the axial direction of the rotor is adjustable.

[0019] The motor according to the second aspect of the embodiments of the present application comprises a rotor and the magnetic adjusting assembly described above, and the magnetic adjusting assembly is movably arranged at at least one end of the rotor in the axial direction.

[0020] According to some embodiments of the present application, the motor further comprises a shell, the shell has an installation cavity inside, the rotor is rotatably installed in the installation cavity, and the magnetic adjusting assembly is arranged in the shell.

[0021] The motor according to the embodiments of the present application can adjust the relative position of the magnetic adjusting assembly and the rotor by adjusting the position of the magnetic adjusting assembly in the circumferential direction and / or the radial direction of the rotor, thereby effectively adjusting the magnetic flux of the rotor and further effectively adjusting the working magnetic field of the motor.

[0022] According to some embodiments of the present application, the shell comprises a shell body and an end cover, the end cover is installed on the shell body, a mounting protruding column is protrudingly arranged on the end cover, the magnetic adjusting assembly comprises a magnetic adjusting wheel, and the magnetic adjusting wheel is sleeved on the mounting protruding column.

[0023] According to some embodiments of the present application, a magnetic adjusting bearing is arranged between the magnetic adjusting wheel and the mounting column.

[0024] According to some embodiments of the present application, the motor further comprises a radial stator, which is mounted in the mounting cavity, and the radial stator is nested with the rotor.

[0025] According to some embodiments of the present application, the rotor comprises a plurality of rotor laminations stacked in the axial direction and at least one rotor magnetic conducting block penetrating the plurality of rotor laminations in the axial direction.

[0026] According to some embodiments of the present application, in a planar projection perpendicular to the axial direction of the rotor, the rotor magnetic conducting block at least partially overlaps with the magnetic adjusting assembly.

[0027] According to some embodiments of the present application, the motor further comprises a rotating shaft rotatably mounted to the housing, and the rotor is mounted to the rotating shaft, and a rotor magnetic shielding plate is arranged at both axial ends of the rotor and fixed to the rotating shaft, and the rotor magnetic conducting block penetrates the rotor magnetic shielding plate in the axial direction.

[0028] According to some embodiments of the present application, the rotor magnetic conducting block is a plurality of rotor magnetic conducting blocks, which are uniformly arranged around the axis of the rotor.

[0029] The electric drive system according to the third aspect of the embodiments of the present application comprises the motor described above.

[0030] The electric drive system according to the embodiments of the present application can adjust the relative position between the magnetic adjusting assembly and the rotor by adjusting the position of the magnetic adjusting assembly in the circumferential direction and / or the radial direction of the rotor, thereby effectively adjusting the magnetic flux of the rotor and further effectively adjusting the working magnetic field of the motor.

[0031] The vehicle according to the fourth aspect of the embodiments of the present application comprises the electric drive system described above.

[0032] The electric drive system of the vehicle according to the embodiments of the present application can adjust the relative position between the magnetic adjusting assembly and the rotor by adjusting the position of the magnetic adjusting assembly in the circumferential direction and / or the radial direction of the rotor, thereby effectively adjusting the magnetic flux of the rotor and further effectively adjusting the working magnetic field of the motor.

[0033] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0034] Fig. 1 is a schematic diagram of an electric machine according to an embodiment of the present application;

[0035] Fig. 2 is a partial enlarged schematic diagram of A in Fig. 1;

[0036] Fig. 3 is a partial enlarged schematic diagram of B in Fig. 1;

[0037] Fig. 4 is a schematic diagram of meshing transmission of the actuating gear and the magnetic adjusting wheel;

[0038] Fig. 5 is a schematic diagram of a part of a rotor;

[0039] Fig. 6 is a schematic diagram of a part of a rotor lamination;

[0040] Fig. 7 is a schematic diagram of a rotor magnetic isolation plate;

[0041] Fig. 8 is a schematic diagram of an electric drive system according to an embodiment of the present application;

[0042] Fig. 9 is a schematic diagram of a vehicle according to an embodiment of the present application.

[0043] Fig. 1 is a schematic diagram of an electric machine according to an embodiment of the present application; DETAILED DESCRIPTION

[0044] The embodiments of the present application are described below in detail with reference to the accompanying drawings. The same or similar components are denoted by the same or similar reference numerals throughout the drawings, and repeated description thereof is omitted. The embodiments described below are examples for explaining the present application, and should not be construed as limiting the present application.

[0045] In the description of the present application, the terms "first", "second", etc. are used only for the purpose of description, and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0046] The magnetic adjusting assembly 3, the electric machine 10, the electric drive system 90 having the electric machine 10, and the vehicle 100 having the electric drive system 90 according to embodiments of the present application are described in detail below with reference to FIGS. 1-9.

[0047] Referring to FIGS. 1-4, the electric machine 10 according to embodiments of the present application includes a rotor 2 and a magnetic adjusting assembly 3 movably arranged at at least one axial end of the rotor 2.

[0048] Referring to FIGS. 1-4, the electric machine 10 according to embodiments of the present application further includes a housing 1 having an installation cavity 12 inside, the rotor 2 is rotatably installed in the installation cavity 12, the magnetic adjusting assembly 3 is an assembly for adjusting the air gap magnetic field of the electric machine 10 by changing the magnetic flux leakage of the permanent magnet, and the magnetic adjusting assembly 3 is arranged in the housing 1.

[0049] The magnetic adjusting assembly 3 according to embodiments of the present application is adapted to be arranged at at least one axial end of the rotor 2, and the position of the magnetic adjusting assembly 3 in the circumferential direction and / or the radial direction of the rotor 2 is adjustable to adjust the magnetic flux passing through the rotor 2.

[0050] Optionally, the position of the magnetic adjusting assembly 3 in the circumferential direction of the rotor 2 is adjustable, for example, the magnetic adjusting assembly 3 rotates relative to the rotor 2 to change the relative position of the magnetic adjusting assembly 3 and the rotor 2.

[0051] Alternatively, the position of the magnetic adjusting assembly 3 in the radial direction of the rotor 2 is adjustable, for example, the magnetic adjusting assembly 3 translates in the radial direction relative to the rotor 2 to change the relative position of the magnetic adjusting assembly 3 and the rotor 2.

[0052] Alternatively, the position of the magnetic adjusting assembly 3 in both the circumferential direction and the radial direction of the rotor 2 is adjustable, for example, the magnetic adjusting assembly 3 rotates relative to the rotor 2 while also moving in the radial direction to change the relative position of the magnetic adjusting assembly 3 and the rotor 2.

[0053] The magnetic adjusting assembly 3 according to embodiments of the present application, by being arranged to have an adjustable position in the circumferential direction and / or the radial direction of the rotor 2, can adjust the relative position of the magnetic adjusting assembly 3 and the rotor 2, thereby effectively adjusting the magnetic flux of the rotor 2 and further effectively adjusting the working magnetic field of the electric machine 10.

[0054] Specifically, the magnetic adjusting assembly 3 can include an axial stator 31 and an actuating component 33 for driving the axial stator 31 to rotate around the circumferential direction of the rotor 2 and / or move in the radial direction of the rotor 2.

[0055] In some embodiments, the actuation mode of the axial stator 31 is circumferential actuation, when the axial stator 31 rotates around the circumferential direction, the circumferential position of the axial stator 31 changes, thereby achieving phase adjustment of the axial stator 31 and the magnetic poles of the rotor 2, and effectively adjusting the working magnetic field of the electric machine 10.

[0056] It can be understood that the "rotation of the axial stator 31 around the circumference" refers to the rotation of the axial stator 31 around the axis of the axial stator 31, and the axial stator 31 is coaxially arranged with the rotor 2, and thus the "rotation of the axial stator 31 around the circumference" also refers to the rotation of the axial stator 31 around the axis of the rotor 2.

[0057] In some other embodiments, the axial stator 31 is driven in a radial direction, and when the axial stator 31 moves in the radial direction of the rotor 2, the radial position of the axial stator 31 changes, so as to realize the phase adjustment of the axial stator 31 and the magnetic poles of the rotor 2, and realize the effective adjustment of the working magnetic field of the motor 10.

[0058] In some other embodiments, the axial stator 31 is driven in a radial direction, and when the axial stator 31 moves in the radial direction of the rotor 2, the radial position of the axial stator 31 changes, so as to realize the phase adjustment of the axial stator 31 and the magnetic poles of the rotor 2, and realize the effective adjustment of the working magnetic field of the motor 10.

[0059] The magnetic adjustment assembly 3 is arranged at the axial end of the rotor 2, which can effectively utilize the space at the end of the rotor 2 and improve the space utilization of the motor 10.

[0060] The magnetic adjustment assembly 3 in the examples of FIGS. 1-3 is only arranged at the upper axial end of the rotor 2. Of course, in some embodiments not shown in the figure, the magnetic adjustment assembly 3 can also be arranged at the lower axial end of the rotor 2, or the magnetic adjustment assembly 3 can be arranged at both the upper axial end and the lower axial end of the rotor 2, and the magnetic adjustment assembly 3 can realize the above-mentioned magnetic adjustment function. Arranging the magnetic adjustment assembly 3 at both ends not only improves the magnetic adjustment capability, but also eliminates the axial unbalanced magnetic pull.

[0061] 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, so as to realize the adjustment of the working magnetic field. However, the axial adjustment has a high requirement on the space of the motor. According to the magnetic adjustment assembly 3 and the motor 10 of the embodiments of the present application, the driving part 33 is arranged, which can drive the axial stator 31 to rotate around the circumference, so as to accurately control the circumferential position of the axial stator 31, and realize the real-time adjustment of the magnetic flux. Compared with the axial adjustment in the related art, the rotation of the axial stator 31 around the circumference in the present application has a lower requirement on the space of the motor 10.

[0062] According to the motor 10 of the embodiment of the present application, the effective adjustment of the permanent magnetic field can be realized, the no-load back electromotive force and voltage of the motor 10 can be controlled in real time; for example, in the low-speed region, the increase of the no-load back electromotive force (i.e. the permanent magnetic flux linkage) is realized by the magnetic adjustment, so as to increase the torque performance and power performance in the low-speed region; in the high-speed region, the decrease of the no-load back electromotive force is realized in real time by the magnetic adjustment, which not only can reduce the core loss, widen the constant power region, increase the peak torque / power in the high-speed region, but also can avoid the damage of the power device due to the overvoltage of the inverter, and add a layer of protection for the electric drive system. At the same time, it is beneficial to improve the high-efficiency region of the motor 10, realize the high matching between the high-efficiency region of the motor 10 and the working condition point of the new energy vehicle, and thus reduce the power consumption and improve the economy.

[0063] In addition to adjusting the permanent magnetic flux linkage, the variable flux permanent magnet motor 10 of the present application can also adjust the winding inductance (the magnetic conducting part in the magnetic adjustment assembly 3 is beneficial to increase the inductance of the motor 10), which is beneficial to realize the self-heating or charging function of the battery on the vehicle by reusing the inductance of the motor 10, reduce the current harmonic, and thus reduce the heating and demagnetization risk of the magnetic steel.

[0064] In some embodiments of the present application, referring to FIGS. 1-4, the magnetic adjustment assembly 3 further comprises a magnetic adjustment wheel 34, the axial stator 31 is fixedly connected with the magnetic adjustment wheel 34, and the actuating member 33 drives the magnetic adjustment wheel 34 to rotate around the circumference to drive the axial stator 31 to rotate around the circumference. In this way, the actuating member 33 does not have to directly drive the axial stator 31 to rotate, but indirectly drives the axial stator 31 to rotate through the magnetic adjustment wheel 34, so that the relative positions of the actuating member 33 and the magnetic adjustment wheel 34 can be reasonably arranged, and the two do not have to be close to each other, so that the motor 10 has greater design freedom. At the same time, the magnetic adjustment wheel 34 serves as a transmission member, which is easier to replace when damaged. Generally, the cost of the magnetic adjustment wheel 34 is lower than that of the axial stator 31, and replacing the damaged magnetic adjustment wheel 34 is beneficial to save costs.

[0065] In some embodiments, the actuating member 33 can directly drive the axial stator 31 to rotate, without having to provide the magnetic adjustment wheel 34, which is beneficial to reduce the number of parts and the overall weight.

[0066] In some embodiments of the present application, referring to FIGS. 1 and 3, the axial stator 31 comprises an axial stator core 311 and an axial stator winding 312, the magnetic adjustment wheel 34 has a stator fixing member 341, the axial stator core 311 comprises a stator yoke portion and a stator tooth portion, the stator yoke portion and the stator tooth portion are fixedly connected, the stator yoke portion is mounted on the stator fixing member 341, and the axial stator winding 312 is wound on the stator tooth portion. By providing the stator yoke portion and the stator tooth portion, the fixing function and the winding function of the axial stator core 311 are arranged in separate zones and do not interfere with each other, and the structure of the axial stator core 311 is more reasonable.

[0067] Optionally, the stator fixing member 341 is a stator fixing groove, the stator yoke portion can be inserted into the stator fixing groove, and the axial stator core 311 is fixed to the magnetic adjusting wheel 34 by the friction force between the outer circumferential surface of the stator yoke portion and the groove wall of the stator fixing member 341. Alternatively, the stator yoke portion and the stator fixing member 341 can also be synchronous in rotation by means of a key (for example, a spline, a flat key, etc.).

[0068] Alternatively, the stator fixing member 341 can also be a protruding structure, and a recess structure is arranged on the stator yoke portion, the protruding structure is embedded in the recess structure, so as to realize the connection and fixation of the stator fixing member 341 and the stator yoke portion.

[0069] In other embodiments, the stator fixing member 341 can also be a buckle, a glue layer or other structural forms, which are not listed one by one here.

[0070] Optionally, the axial stator core 311 can be wound by steel sheets, so as to reduce the iron loss and further improve the efficiency of the motor 10.

[0071] In some embodiments of the present application, referring to FIGS. 1 and 3, the axial stator core 311 is fixedly connected to one end of the magnetic adjusting wheel 34 close to the rotor 2. In this way, the axial stator core 311 is closer to the rotor 2 than the magnetic adjusting wheel 34, and the axial stator core 311 is not shielded by the magnetic adjusting wheel 34 from the rotor 2, so that the magnetic field between the axial stator core 311 and the rotor 2 is more easily generated, and the magnetic field adjustment between the axial stator core 311 and the rotor 2 is more sensitive when the circumferential position of the axial stator core 311 changes.

[0072] In some embodiments of the present application, referring to FIGS. 1 and 4, the actuating member 33 includes a driving device 331 and an actuating transmission member 332, the driving device 331 is used to drive the actuating transmission member 332 to act, and the actuating transmission member 332 is used to drive the magnetic adjusting wheel 34 to rotate. By arranging the actuating transmission member 332, the speed regulation function can be realized, for example, the speed of the driving device 331 is reduced and then transmitted to the magnetic adjusting wheel 34, so as to prevent the magnetic adjusting wheel 34 from rotating at too high a speed and causing poor magnetic adjusting effect. The rotation speed and angle of the magnetic adjusting wheel 34 facilitate the accurate positioning of the circumferential position, so that the circumferential position of the axial stator core 311 can be accurately positioned, and better magnetic adjusting effect is obtained.

[0073] Optionally, the driving device 331 is a servo motor, which can realize stepless magnetic adjustment. Alternatively, the driving device 331 is a hydraulic or pneumatic driving device.

[0074] In some embodiments of the present application, referring to FIG. 1 and FIG. 4, the actuating transmission member 332 is an actuating gear, the magnetic adjusting wheel 34 is a magnetic adjusting gear, and the actuating gear meshes with the magnetic adjusting gear to drive the magnetic adjusting gear to rotate. In this way, when the driving device 331 drives the actuating gear to rotate, the actuating gear drives the magnetic adjusting gear to rotate. For example, the driving device 331 is a servo motor, and when the motor 10 adjusts the magnetic flux, the servo motor in the actuating member 33 drives the actuating gear to rotate, and the magnetic adjusting gear meshing with the actuating gear rotates, and the magnetic adjusting gear drives the axial stator 31 to rotate to a predetermined circumferential position, thereby achieving the phase adjustment of the axial stator 31 and the magnetic poles of the rotor 2, and achieving the magnetic field adjustment.

[0075] Or in some other embodiments of the present application, the actuating transmission member 332 includes an actuating driving wheel and an actuating belt, and the driving device 331 is used to drive the actuating driving wheel to rotate, and the magnetic adjusting wheel 34 is a magnetic adjusting pulley, and the actuating driving wheel drives the magnetic adjusting pulley to rotate through the actuating belt. The belt transmission is suitable for long-distance transmission, and is more suitable when the motor 10 is large in size, which can avoid the high cost problem caused by using too many gear transmissions.

[0076] In some embodiments of the present application, the position of the magnetic adjusting assembly 3 in the axial direction of the rotor 2 is adjustable. For example, the magnetic adjusting assembly 3 is raised and lowered relative to the rotor 2 in the axial direction of the rotor 2. That is, the magnetic adjusting assembly 3 can adjust the position in the axial direction of the rotor 2 while adjusting the position in the circumferential direction and / or the radial direction of the rotor 2 relative to the rotor 2. For example, the magnetic adjusting assembly 3 is helically raised and lowered relative to the rotor 2.

[0077] In some embodiments of the present application, referring to FIG. 1-3, the shell 1 includes a housing 17 and an end cover 16, the end cover 16 is installed on the housing 17, a mounting protruding column 161 is protrudingly arranged on the end cover 16, and the magnetic adjusting wheel 34 is sleeved on the mounting protruding column 161, so that the position of the magnetic adjusting wheel 34 in the mounting cavity 12 is accurate. Alternatively, the end cover 16 and the housing 17 can be connected and fixed by using bolts, rivets and other fasteners, or can be glued and welded.

[0078] In some embodiments of the present application, referring to FIG. 1-3, a magnetic adjusting bearing 83 is arranged between the magnetic adjusting wheel 34 and the mounting protruding column 161. In this way, the wear between the magnetic adjusting wheel 34 and the mounting protruding column 161 can be reduced, so that the rotation of the magnetic adjusting wheel 34 is more stable and smooth.

[0079] In some embodiments of the present application, referring to FIG. 1, the motor 10 further comprises a radial stator 4, which is installed in the installation cavity 12 and is nested with the rotor 2. Alternatively, in the example shown in FIG. 1, the radial stator 4 can be nested radially outside the rotor 2; or alternatively, the rotor 2 can be nested radially outside the radial stator 4 (not shown in the figure). When the rotor 2 rotates, the rotor 2 and the radial stator 4 move relatively in the circumferential direction, which can generate a magnetic field. The radial stator 4 and the axial stator 31 form a radial / axial composite stator, and both the radial stator 4 and the axial stator 31 participate in energy conversion, which can effectively increase the torque density and power density of the motor 10. That is, the axial stator winding 312 of the axial stator 31 can provide additional power and torque for the motor 10, and the axial stator 31 is located at the axial end of the rotor 2, which can effectively utilize the wasted space at the end of the rotor 2, thereby improving the space utilization of the motor 10 and further increasing the power density and torque density of the motor 10.

[0080] In some embodiments of the present application, referring to FIG. 1, the radial stator 4 comprises a radial stator core 41 and a radial stator winding 42, and the radial stator winding 42 is wound around the radial stator core 41.

[0081] In some embodiments of the present application, referring to FIGS. 1, 3, 5-6, the rotor 2 comprises a plurality of rotor laminations 21 and at least one rotor magnetic conducting block 22, the plurality of rotor laminations 21 are stacked along the axial direction, and the rotor magnetic conducting block 22 penetrates the plurality of rotor laminations 21 along the axial direction.

[0082] The axial stator core 311 and the rotor magnetic conducting block 22 are both magnetic conducting materials, the rotor magnetic conducting block 22 has good magnetic permeability in the axial and radial directions, and the axial direction of the axial stator 31 is the high magnetic permeability direction. Part of the magnetic field of the permanent magnet 23 of the rotor 2 forms a loop through the rotor magnetic conducting block 22 and the axial stator 31, and the effective adjustment of the air gap magnetic field can be realized by adjusting the circumferential position of the axial stator 31 and the rotor 2.

[0083] Alternatively, the material of the rotor lamination 21 is a soft magnetic material, and common soft magnetic materials include silicon steel sheets, amorphous and nanocrystalline alloys, iron-cobalt materials, and stainless steel magnetic conducting materials. The rotor lamination 21 can be further provided with auxiliary slots, non-uniform air gaps, and inclined poles to suppress magnetic field harmonics, torque pulsation, and NVH, etc.

[0084] In some embodiments of the present application, referring to FIG. 1, in the planar projection perpendicular to the axial direction of the rotor 2, the rotor magnetic conducting block 22 and the magnetic adjusting assembly 3 at least partially overlap. In other words, the magnetic adjusting assembly 3 is at least partially located in the axial direction of the rotor magnetic conducting block 22, so that when the magnetic adjusting assembly 3 approaches or moves away from the rotor 2 along the axial direction of the rotor 2, the magnetic flux passing through the rotor magnetic conducting block 22 can be adjusted, thereby changing the size of the magnetic field.

[0085] In some embodiments of the present application, referring to FIG. 1, FIG. 3, FIG. 5-FIG. 7, the motor 10 further comprises: a rotating shaft 7 and a rotor isolation plate 6, the rotating shaft 7 is rotatably installed in the shell 1, the rotor 2 is installed on the rotating shaft 7, the rotor isolation plate 6 is arranged at the axial two ends of the rotor 2, and the rotor isolation plate 6 is fixed on the rotating shaft 7, and the rotor magnetic block 22 penetrates the rotor isolation plate 6 in the axial direction.

[0086] In some embodiments of the present application, referring to FIG. 1, FIG. 6-FIG. 7, FIG. 9, the rotor punching sheet 21 is provided with a magnetic block groove 212 penetrating the rotor punching sheet 21 in the thickness direction of the rotor punching sheet 21, the rotor magnetic block 22 penetrates the magnetic block groove 212 in the axial direction, the rotor magnetic block 22 penetrates the rotor punching sheet 21 or is integrally formed with the rotor punching sheet 21, and the magnetic field between the rotor magnetic block 22 and the axial stator 31 is stronger. The rotor punching sheet 21 is also provided with a rotor shaft hole 211 penetrating the rotor punching sheet 21 in the thickness direction of the rotor punching sheet 21, and the rotating shaft 7 penetrates the rotor shaft hole 211 in the axial direction. Therefore, the rotor punching sheet 21 is not easy to separate from the rotating shaft 7 in the radial direction, which is conducive to ensuring that the rotor punching sheet 21 can be better fixed on the rotating shaft 7. Of course, in other optional embodiments, the rotor shaft hole 211 can also be a blind hole.

[0087] In some embodiments of the present application, referring to FIG. 6-FIG. 7, the rotor punching sheet 21 is also provided with a magnetic steel groove 213 penetrating the rotor punching sheet 21 in the thickness direction of the rotor punching sheet 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, etc. 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 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) such as a "one" word, a single "V", a double "V", a "one+V", a "U type", a "W type", a "V+U type", etc. Of course, in other optional embodiments, the magnetic steel groove 213 can also be a blind groove.

[0088] In combination with FIG. 1, FIG. 7, the rotor isolation plate 6 is provided with an isolation plate through hole 61 penetrating the rotor isolation plate 6 in the thickness direction of the rotor isolation plate 6, and the rotor magnetic block 22 penetrates the isolation plate through hole 61 in the axial direction. Therefore, the rotor isolation plate 6 can avoid the rotor magnetic block 22 in the axial direction, so that the magnetic field between the rotor magnetic block 22 and the axial stator 31 is stronger. The rotor isolation plate 6 is also provided with an isolation plate shaft hole 62 penetrating the rotor isolation plate 6 in the thickness direction of the rotor isolation plate 6, and the rotating shaft 7 penetrates the isolation plate shaft hole 62 in the axial direction. Therefore, the rotor isolation plate 6 is not easy to separate from the rotating shaft 7 in the radial direction, which is conducive to ensuring that the rotor isolation plate 6 can be better fixed on the rotating shaft 7. Of course, in other optional embodiments, the isolation plate through hole 61 can also be a blind hole.

[0089] In some embodiments of the present application, the rotor flux-conducting blocks 22 are multiple, and the multiple rotor flux-conducting blocks 22 are uniformly arranged around the axis of the rotor 2.

[0090] Alternatively, the rotor flux-conducting blocks 22 are one.

[0091] In some embodiments of the present application, referring to FIGS. 1-3 and 9, the shell 1 includes a housing 17 and an end cover 16, the end cover 16 is mounted on the housing 17, one end of the rotating shaft 7 is supported on the end cover 16 through a first bearing 81, and the other end of the rotating shaft 7 is supported on the housing 17 through a second bearing 82, which can reduce the wear between the rotating shaft 7 and the shell 1, so that the rotating shaft 7 rotates more smoothly and smoothly.

[0092] Alternatively, the first bearing 81 can be a deep groove ball bearing or a cylindrical roller bearing.

[0093] Alternatively, the second bearing 82 can be a deep groove ball bearing or a cylindrical roller bearing.

[0094] The motor 10 according to the embodiments of the present application is a variable flux permanent magnet motor 10, which adjusts the magnetic flux through the magnetic adjusting assembly 3 located at the axial end of the rotor 2 and the rotor flux-conducting blocks 22 of the rotor 2.

[0095] The motor 10 according to the embodiments of the present application is provided with a rotor 2, a radial stator 4, rotor flux-conducting blocks 22, and an axial stator 31 located at at least one axial end of the rotor 2, the rotor 2 and the radial stator 4 form a main magnetic circuit, and the rotor flux-conducting blocks 22 and the axial stator 31 form an auxiliary magnetic adjusting magnetic circuit.

[0096] The motor 10 according to one specific embodiment of the present application includes a shell 1 (a housing 17 and an end cover 16), a radial stator 4 (a radial stator core 41 and a radial stator winding 42), a rotor 2 (a rotor core and permanent magnets 23), a magnetic adjusting assembly 3, and a rotating shaft 7. The magnetic adjusting assembly 3 includes an axial stator 31 (an axial stator core 311 and an axial stator winding 312), a magnetic adjusting gear (a stator fixing member 341 and a magnetic adjusting tooth), and an actuating component 33, the magnetic adjusting gear is fixedly connected with the magnetic adjusting gear, the actuating component includes an actuating gear and a servo motor, the actuating gear is engaged with the magnetic adjusting gear, the servo motor controls the rotation of the actuating gear to drive the rotation of the magnetic adjusting gear, thereby changing the circumferential relative position of the axial stator 31 and the magnetic poles of the rotor 2. The end cover 16 is provided with a magnetic adjusting bearing 83, the outer ring of the magnetic adjusting bearing 83 is matched with the inner ring of the magnetic adjusting gear, when the magnetic adjusting gear is actuated, the magnetic adjusting gear and the fixed members such as the end cover 16 are relatively rotated. The rotor flux-conducting blocks 22 extend out of the axial flux-conducting block through hole 61 of the rotor flux-conducting block 6.

[0097] In some optional embodiments, the rotor core can not be formed by lamination of laminated sheets, but a solid rotor core. In this case, the rotor magnetic conducting block 22 can be combined with the rotor core to form an integrally formed part, thereby forming a rotor core part with magnetic conduction in all directions, which can provide a magnetic flux path for the main magnetic circuit and the auxiliary magnetic circuit.

[0098] In some embodiments of the present application, referring to FIG. 1, the radial stator 4 and the rotor 2 have an air gap 9 therebetween, so that the rotor 2 can rotate smoothly without interference with the radial stator 4.

[0099] The motor 10 according to the embodiments of the present application can realize the function of adjusting the permanent magnetic field, and has the advantages of constant torque area and constant power area, which can effectively widen the constant power operation area and the high efficiency area while ensuring high torque density and power density. By setting the magnetic adjusting assembly 3, an additional magnetic adjusting degree is introduced, which is conducive to reducing the dependence on the armature direct-axis field weakening current in the medium and high speed region, and thus is conducive to reducing the risk of irreversible demagnetization of the magnetic steel.

[0100] The purpose of the motor 10 according to the embodiments of the present application is to reduce the main magnetic field (the main magnetic field is the effective magnetic field provided by the rotor 2 magnetic steel to the stator winding, also referred to as the main magnetic flux) at high speed, reduce the negative effects of field weakening including copper loss and demagnetization risk caused by large current, or to increase the main magnetic field at heavy load, increase the permanent magnetic flux to increase the torque output.

[0101] Referring to FIG. 8, the electric drive system 90 according to the third aspect of the present application includes the motor 10 of the above embodiments.

[0102] The electric drive system 90 according to the embodiments of the present application, the motor 10 thereof can adjust the position of the magnetic adjusting assembly 3 in the circumferential direction and / or the radial direction of the rotor 2, so as to adjust the relative position of the magnetic adjusting assembly 3 and the rotor 2, thereby effectively adjusting the magnetic flux of the rotor 2, and further effectively adjusting the working magnetic field of the motor 10.

[0103] Referring to FIG. 9, the vehicle 100 according to the fourth aspect of the present application includes the electric drive system 90 of the above embodiments.

[0104] The vehicle 100 according to the embodiments of the present application, the motor 10 of the electric drive system 90 thereof can adjust the position of the magnetic adjusting assembly 3 in the circumferential direction and / or the radial direction of the rotor 2, so as to adjust the relative position of the magnetic adjusting assembly 3 and the rotor 2, thereby effectively adjusting the magnetic flux of the rotor 2, and further effectively adjusting the working magnetic field of the motor 10.

[0105] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0106] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0107] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0108] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A magnetic adjustment component (3), wherein, The magnetic flux adjustment component (3) is adapted to be disposed at at least one end of the rotor (2) in the axial direction. The position of the magnetic flux adjustment component (3) in the circumferential and / or radial direction of the rotor (2) is adjustable to adjust the magnetic flux through the rotor (2).

2. The magnetizing assembly (3) according to claim 1, wherein, The magnetic adjustment assembly (3) includes an axial stator (31) and an actuating component (33), the actuating component (33) being used to drive the axial stator (31) to rotate circumferentially about the rotor (2) and / or move radially about the rotor (2).

3. The magnetizing assembly (3) according to claim 2, wherein, The magnetic adjustment assembly (3) further includes a magnetic adjustment wheel (34), the axial stator (31) is fixedly connected to the magnetic adjustment wheel (34), and the actuating component (33) drives the magnetic adjustment wheel (34) to rotate around the circumference to drive the axial stator (31) to rotate around the circumference.

4. The magnetizing assembly (3) according to claim 3, wherein, The axial stator (31) includes an axial stator core (311) and an axial stator winding (312). The magnetic adjusting wheel (34) has a stator fixing member (341). The axial stator core (311) includes a stator yoke and a stator tooth. The stator yoke and the stator tooth are fixedly connected. The stator yoke is installed on the stator fixing member (341). The axial stator winding (312) is wound around the stator tooth.

5. The magnetizing assembly (3) according to claim 3 or 4, wherein, The actuating component (33) includes a driving device (331) and an actuating transmission component (332). The driving device (331) is used to drive the actuating transmission component (332) to move, and the actuating transmission component (332) is used to drive the magnetic adjustment wheel (34) to rotate.

6. The magnetizing assembly (3) according to claim 5, wherein, The actuation transmission component (332) is an actuation gear, and the magnetic adjustment wheel (34) is a magnetic adjustment gear. The actuation gear meshes with the magnetic adjustment gear to drive the magnetic adjustment gear to rotate. Alternatively, the actuation transmission component (332) includes an actuation drive wheel and an actuation belt, the drive device (331) is used to drive the actuation drive wheel to rotate, the magnetic adjustment wheel (34) is a magnetic adjustment belt pulley, and the actuation drive wheel drives the magnetic adjustment belt pulley to rotate through the actuation belt.

7. The magnetizing assembly (3) according to any one of claims 1-6, wherein, The position of the magnetic adjustment component (3) in the axial direction of the rotor (2) is adjustable.

8. An electric motor (10), wherein, include: Rotor (2); and The magnetic adjustment component (3) according to any one of claims 1-7 is movably disposed at at least one end of the rotor (2) along its axial direction.

9. The motor (10) according to claim 8, wherein, The motor (10) further includes: a housing (1) having a mounting cavity (12) inside, the rotor (2) being rotatably mounted in the mounting cavity (12), and the magnetizing assembly (3) being disposed in the housing (1).

10. The motor (10) according to claim 9, wherein, The outer casing (1) includes a housing (17) and an end cap (16). The end cap (16) is mounted on the housing (17). The end cap (16) has a protruding mounting post (161). The magnetic adjustment assembly (3) includes a magnetic adjustment wheel (34). The magnetic adjustment wheel (34) is sleeved on the mounting post (161).

11. The motor (10) according to claim 10, wherein, A magnetic adjustment bearing (83) is provided between the magnetic adjustment wheel (34) and the mounting protrusion (161).

12. The motor (10) according to any one of claims 9-11, wherein, The motor (10) also includes a radial stator (4), which is installed in the mounting cavity (12) and nested with the rotor (2).

13. The motor (10) according to any one of claims 9-12, wherein, The rotor (2) includes a plurality of rotor laminations (21) and at least one rotor magnetic block (22), the plurality of rotor laminations (21) are stacked axially, and the rotor magnetic block (22) passes through the plurality of rotor laminations (21) axially.

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

15. The motor (10) according to claim 13 or 14, wherein, Also includes: A rotating shaft (7) rotatably mounted on the housing (1), and a rotor (2) mounted on the rotating shaft (7); and The rotor magnetic shielding plate (6) is disposed at both ends of the rotor (2) and fixed to the rotating shaft (7). The rotor magnetic block (22) passes through the rotor magnetic shielding plate (6) along the axial direction.

16. The motor (10) according to any one of claims 13-15, wherein, There are multiple rotor magnetic blocks (22), and the multiple rotor magnetic blocks (22) are evenly arranged around the axis of the rotor (2).

17. A vehicle (100), wherein, Includes an electric drive system (90), which includes the motor (10) according to any one of claims 8-16.

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