Iron core, rotor, stator, motor, suspension system and vehicle

Abstract

The present application provides an iron core, a rotor, a stator, a motor, a suspension system and a vehicle. The iron core comprises a magnetic flux conductor and insulating sheets; the magnetic flux conductor comprises a body and a first boss; the first boss is arranged at one end of the body in the axial direction in a protruding manner; accommodating slots are formed in the body; and the insulating sheets are accommodated in the accommodating slots. In the present application, the accommodating slots are formed in the magnetic flux conductor, and are used for accommodating the insulating sheets; and the insulating sheets are arranged in the magnetic flux conductor so that the iron core is divided into a plurality of sections.

Description

Iron core, rotor, stator, motor, suspension system and vehicle

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202420923742.0, filed on April 29, 2024, and entitled "Iron core, rotor, stator, motor, suspension system and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of motors, in particular to an iron core, a rotor, a stator, a motor, a suspension system and a vehicle. BACKGROUND

[0004] A motor includes a motor and a generator, which is a device for converting electrical energy and mechanical energy into each other, and has been widely used in various industries. The motor mainly consists of a stator and a rotor, both of which include an iron core. When the motor is powered on, varying magnetic flux will be generated in the iron core. Since the iron core is a magnetic conductor, the varying magnetic flux will cause electromagnetic induction in the iron core, thereby forming a self-closed current loop inside the iron core. This current form is called eddy current.

[0005] In the related art, the eddy current passing through the iron core generates a lot of heat energy inside the iron core, resulting in serious eddy current loss of the iron core and reducing the efficiency of the motor.

[0006] Practical new type content

[0007] The purpose of the present application is to provide an iron core, a rotor, a stator, a motor, a suspension system and a vehicle, which solves the problem of serious eddy current loss of the iron core and reduces the efficiency of the motor.

[0008] To achieve the purpose of the present application, the present application provides the following technical solutions:

[0009] In a first aspect, the present application provides an iron core, comprising:

[0010] A magnetic conductor, the magnetic conductor comprising a body and a first boss, the first boss being protruded on one end of the body along the axial direction, and the body being provided with a receiving groove;

[0011] A spacer, the spacer being accommodated in the receiving groove.

[0012] In combination with the first aspect, in a possible implementation manner, the first boss is arranged around the radial inner side wall of the body, and the radial outer side wall of the first boss is used to wind a winding.

[0013] In combination with the first aspect, in a possible implementation manner, the spacer is arranged to be insulated between the magnetic conductor.

[0014] With reference to the first aspect, in a possible implementation form of the first aspect, an insulation layer is arranged between the slot wall of the accommodating slot and the outer surface of the partition plate.

[0015] With reference to the first aspect, in a possible implementation form of the first aspect, the insulation layer is arranged on the slot wall of the accommodating slot or the outer surface of the partition plate.

[0016] With reference to the first aspect, in a possible implementation form of the first aspect, the accommodating slot extends along the radial direction of the magnet conductor, the length direction of the partition plate is in the same direction as the radial direction of the magnet conductor, and the width direction of the partition plate is in the same direction as the axial direction of the magnet conductor.

[0017] With reference to the first aspect, in a possible implementation form of the first aspect, the radial side wall of the body or the end surface of the body in the axial direction is recessed to form the accommodating slot.

[0018] With reference to the first aspect, in a possible implementation form of the first aspect, the accommodating slot extends through the body along the axial direction of the magnet conductor, one end surface of the partition plate is flush with one end surface of the body in the axial direction, and the other end surface of the partition plate is flush with the other end surface of the body in the axial direction.

[0019] With reference to the first aspect, in a possible implementation form of the first aspect, the partition plate is in interference fit with the accommodating slot.

[0020] With reference to the first aspect, in a possible implementation form of the first aspect, a plurality of partition plates are provided, and a plurality of accommodating slots are arranged on the body at intervals in the circumferential direction of the magnet conductor, and at least one partition plate is accommodated in each of the accommodating slots.

[0021] With reference to the first aspect, in a possible implementation form of the first aspect, the plurality of accommodating slots are uniformly distributed in the circumferential direction of the magnet conductor.

[0022] With reference to the first aspect, in a possible implementation form of the first aspect, the thickness of each partition plate is less than 1 mm.

[0023] With reference to the first aspect, in a possible implementation form of the first aspect, the magnet conductor further comprises a second boss arranged on one end of the body away from the first boss in the axial direction, and the second boss is used for winding the winding.

[0024] The second aspect provides a rotor, which comprises a plurality of the iron cores according to the first aspect, and the plurality of iron cores are arranged in layers.

[0025] The third aspect provides a stator, which comprises a winding and a plurality of iron cores, and the winding is wound on and connected to the radial outer side wall of the first boss.

[0026] With reference to the third aspect, in a possible implementation manner, the plurality of core layers are stacked.

[0027] With reference to the fourth aspect, the application further provides an electric machine, which comprises the rotor according to the second aspect or the stator according to the third aspect.

[0028] With reference to the fifth aspect, the application further provides a suspension system, which comprises the electric machine according to the fourth aspect.

[0029] With reference to the sixth aspect, the application further provides a vehicle, which comprises the electric machine according to the fourth aspect or the suspension system according to the fifth aspect.

[0030] In the application, the magnetic conductor comprises a body and a first boss, the body is provided with a receiving groove for accommodating a partition, and the first boss is used for winding a winding; the partition is arranged in the body, so as to divide the core into a plurality of parts. When the magnetic flux passes through the core, the eddy current generated by the changing magnetic flux is respectively limited in the magnetic conductor and the partition, which can effectively reduce the eddy current caused by the change of the magnetic flux, reduce the core eddy current loss, and improve the efficiency of the electric machine. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the application or the related art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the related art. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0032] Fig. 1 is a perspective view of a core according to an embodiment of the application;

[0033] Fig. 2 is a sectional view of the core according to an embodiment of the application;

[0034] Fig. 3 is an exploded view of the core according to an embodiment of the application;

[0035] Fig. 4 is a structural schematic view of a partition according to an embodiment of the application;

[0036] Fig. 5 is a perspective view and a sectional view of a core according to another embodiment of the application;

[0037] Fig. 6 is a structural schematic view of a body according to an embodiment of the application;

[0038] Fig. 7 is a top view and an A-A sectional view of a core according to an embodiment of the application.

[0039] Label explanation: 100, iron core; 110, magnetic conductor; 111, containing groove; 112, end face; 113, body; 114, first boss; 115, second boss; 120, spacer; 130, insulating shell. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0041] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be an intervening component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be an intervening component.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0043] Some embodiments of the present application will be described in detail below with reference to the drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0044] The present application provides a vehicle, which comprises a vehicle frame, a power battery, a motor and a suspension system, and the power battery and the motor are installed on the vehicle frame. The power battery serves as the main energy source of the vehicle and is used to store and release electric energy. The motor can be a driving motor of the vehicle or be applied to the suspension system. The power battery provides electric energy for the driving motor to drive the vehicle to travel. The wheels are connected to the vehicle frame through the suspension system. During the travel of the vehicle, the unevenness of the road surface will cause the vibration of the vehicle. The vibration is transmitted to the suspension system through the wheels, and the suspension system is adjusted through the motor to achieve the shock absorption of the vehicle.

[0045] For a hybrid vehicle, the vehicle further comprises an engine, and the motor can be a generator. The power output by the engine can be transmitted to the generator, and the electric energy output by the generator can charge the power battery to improve the cruising range of the vehicle.

[0046] The application provides a motor, which comprises a winding and a core, and the winding is wound on the core. The winding is wound by copper wire or aluminum wire according to a certain number of turns and winding form. The winding is used for realizing conversion and transmission of electric energy. When electric current passes through the winding, a magnetic field is generated in the core, thereby forming magnetic flux. The motor comprises a radial flux motor and an axial flux motor. The radial flux motor refers to a motor in which magnetic flux flows along the radial direction of the core. The winding of the radial flux motor is wound in the radial direction of the core, thereby forming radial magnetic flux in the core. The axial flux motor refers to a motor in which magnetic flux is parallel to the axial direction of the core, i.e., the magnetic flux flows along the axial direction of the core.

[0047] The motor comprises a stator and a rotor. The stator is fixed on the shell, and the rotor is accommodated in the stator. The rotor rotates by the rotating magnetic field generated by the stator. The stator and the rotor both comprise a core. When the motor is powered, varying magnetic flux is generated in the core. Since the core is a magnetic conductor, the varying magnetic flux generates electromagnetic induction in the core, thereby forming a self-closing current loop in the core. This current form is called eddy current.

[0048] In the related art, when the eddy current passes through the core, a large amount of heat energy is generated in the core, which causes serious eddy current loss of the core and reduces the efficiency of the motor.

[0049] Please refer to FIG. 1, FIG. 2, FIG. 3 and FIG. 4. FIG. 1 is a perspective view of a core according to an embodiment of the application. FIG. 2 is a sectional view of the core according to an embodiment of the application. FIG. 3 is an exploded view of the core according to an embodiment of the application. FIG. 4 is a structural schematic view of a spacer according to an embodiment of the application. The application provides a core 100, which comprises a magnetic conductor 110 and a spacer 120. The magnetic conductor 110 comprises a body 113 and a first boss 114. The first boss 114 protrudes from one end of the body 113 in the axial direction. The body 113 is provided with an accommodating groove 111. The spacer 120 is accommodated in the accommodating groove 111. In the application, the magnetic conductor 110 is arranged in a whole annular shape. The accommodating groove 111 arranged on the body 113 is used for accommodating the spacer 120. The spacer 120 is arranged in the body 113, thereby dividing the core 100 into multiple parts. The first boss 114 is used for winding the winding. When the winding is powered, the magnetic flux in the core 100 passes through the magnetic flux. The eddy current generated by the varying magnetic flux is respectively limited in the magnetic conductor 110 and the spacer 120, which can effectively reduce the eddy current caused by the varying magnetic flux, reduce the eddy current loss of the core 100, and improve the efficiency of the motor.

[0050] The first boss 114 is arranged around the radially inner side wall of the body 113, that is, the first boss 114 is arranged in a ring shape. The region between the end face of the body 113 in the axial direction and the radially outer side wall of the first boss 114 forms an accommodating space for accommodating the winding, and the winding is arranged on and connected to the radially outer side wall of the first boss 114, so as to facilitate the installation of the winding.

[0051] In a possible implementation, the accommodating groove 111 extends to the region of the first boss 114, that is, the spacer 120 is also accommodated in the first boss 114, so as to further separate the magnetic conductor 110 and reduce the influence of the magnetic flux on the core 100.

[0052] When the core 100 provided in the application is applied to a stator, the rotor includes a plurality of cores 100, and the plurality of cores 100 are arranged in a stacked manner, and the winding is arranged between adjacent two cores 100.

[0053] When the core 100 provided in the application is applied to a rotor, the rotor includes a plurality of cores 100, and the plurality of cores 100 are arranged in a stacked manner, so as to enhance the magnetic conductive performance of the whole rotor and improve the power of the motor.

[0054] Referring to FIGS. 1, 2 and 5, the magnetic conductor 110 further includes a second boss 115, which is protruded on the end of the body 113 away from the first boss 114 in the axial direction. The first boss 114 and the second boss 115 can both be used for installing the winding, and the spacer 120 can be embedded in the body 113, the first boss 114 and the second boss 115, so as to circumferentially separate the whole magnetic conductor 110.

[0055] In some embodiments, the shape of the spacer 120 is shaped according to the cross-sectional shape of the magnetic conductor 110 parallel to the axial direction of the magnetic conductor 110, so as to cooperate with the magnetic conductor 110 of the corresponding cross-sectional shape.

[0056] In some embodiments, the magnetic conductor 110 can be made into an integral ring structure by a powder metallurgy process or the like using a magnetic conductive material, so as to facilitate the manufacturing of the magnetic conductor 110; and the spacer 120 can be made into a sheet structure by a stamping process or the like. The material of the magnetic conductor 110 and the spacer 120 can be one of silicon steel, ferroalloy, aluminum and stainless steel. The magnetic conductor 110 and the spacer 120 can be made of the same magnetic conductive material or different magnetic conductive materials, which is highly selective.

[0057] In the iron core 100 provided in the present application, the insulation is provided between the spacer 120 and the magnetic conductor 110. When the spacer 120 is accommodated in the body 113, the insulation is provided between the spacer 120 and the body 113; when the spacer 120 is accommodated in the body 113 and the first boss 114, the insulation is provided between the spacer 120 and the body 113 and the first boss 114. In some embodiments, an insulation layer is provided between the groove wall of the accommodation groove 111 and the outer surface of the spacer 120. The insulation layer can be insulating paint or insulating paper, which can effectively insulate the current path between the magnetic conductor 110 and the spacer 120, thereby reducing the influence of the magnetic flux on the iron core 100.

[0058] In the iron core 100 provided in the present application, the insulation layer is provided on the groove wall of the accommodation groove 111 or the outer surface of the spacer 120, that is, the insulation layer can be coated or pasted on the groove wall of the accommodation groove 111 or the outer surface of the spacer 120 by brushing, spraying, dipping, pasting and the like, which can achieve the electrical insulation between the magnetic conductor 110 and the spacer 120.

[0059] In some embodiments, the insulation layer is coated on the outer surface of the spacer 120. Compared with coating the insulation layer on the groove wall of the narrow accommodation groove 111, the scheme of providing the insulation layer on the outer surface of the spacer 120 is convenient for processing and manufacturing.

[0060] In the iron core 100 provided in the present application, the spacer 120 is in interference fit with the accommodation groove 111, so that the spacer 120 is accommodated in the accommodation groove 111 of the magnetic conductor 110 and can be inhibited from being detached from the accommodation groove 111, and the overall structure of the iron core 100 is compact and has high space utilization.

[0061] Referring to FIGS. 3 and 4, the accommodation groove 111 extends along the radial direction of the magnetic conductor 110, so that the iron core 100 is divided into multiple parts in the circumferential direction. In some embodiments, the length direction of the spacer 120 is in the same direction a as the radial direction of the magnetic conductor 110, and the width direction of the spacer 120 is in the same direction b as the axial direction of the magnetic conductor 110. When the winding is energized, the radial magnetic flux passes through the iron core 100, and the eddy current generated by the changing magnetic flux is respectively limited in the mutually insulated magnetic conductor 110 and the spacer 120, which can effectively reduce the eddy current caused by the change of the radial magnetic flux, reduce the eddy current loss of the iron core 100, and improve the efficiency of the motor.

[0062] In one embodiment, the end surface 112 of the magnetic conductor 110 at one axial end is recessed to form the accommodating groove 111. Specifically, the magnetic conductor 110 includes two end surfaces 112 axially opposite to each other, and the accommodating groove 111 is formed by recessing one of the end surfaces 112, so that the accommodating groove 111 extends along the axial direction of the magnetic conductor 110, thereby forming an accommodating groove 111 extending along the axial and radial directions of the magnetic conductor 110, and the spacer 120 is accommodated in the accommodating groove 111, thereby separating the magnetic conductor 110 circumferentially and reducing the influence of the magnetic flux on the core 100.

[0063] In one possible embodiment, the accommodating groove 111 extends through the magnetic conductor 110 along the axial direction of the magnetic conductor 110, and one end surface of the spacer 120 is flush with one end surface 112 of the magnetic conductor 110 in the axial direction, and the other end surface of the spacer 120 is flush with the other end surface 112 of the magnetic conductor 110 in the axial direction. The accommodating groove 111 extends through the magnetic conductor 110 along the axial direction, so that the spacer 120 completely separates the magnetic conductor 110 in the axial direction of the magnetic conductor 110, thereby further reducing the influence of the magnetic flux on the core 100. It should be noted that the spacer 120 can also extend out of the accommodating groove 111 along the axial direction of the magnetic conductor 110, and can also completely separate the magnetic conductor 110 in the axial direction of the magnetic conductor 110.

[0064] In some embodiments, the magnetic conductor 110 includes a radial outer wall and a radial inner wall spaced apart along the radial direction of the magnetic conductor 110, and the accommodating groove 111 is recessed from the radial outer wall or the radial inner wall of the magnetic conductor 110. That is, the spacer 120 can be embedded in the magnetic conductor 110 from the radial outer wall or the radial inner wall of the magnetic conductor 110, and the spacer 120 can also separate the magnetic conductor 110.

[0065] In the core 100 provided in the present application, a plurality of spacers 120 are provided, and a plurality of accommodating grooves 111 are spaced apart along the circumferential direction of the magnetic conductor 110 on the magnetic conductor 110, and at least one spacer 120 is accommodated in each accommodating groove 111. Specifically, by embedding a plurality of spacers 120 in the circumferential direction of the magnetic conductor 110, the core 100 is divided into a plurality of parts in the circumferential direction as a whole, so as to further reduce the influence of the magnetic flux on the core 100.

[0066] In the core 100 provided in the present application, a plurality of spacers 120 are provided, and a plurality of accommodating grooves 111 are spaced apart along the circumferential direction of the magnetic conductor 110 on the magnetic conductor 110, and at least one spacer 120 is accommodated in each accommodating groove 111. Specifically, by embedding a plurality of spacers 120 in the circumferential direction of the magnetic conductor 110, the core 100 is divided into a plurality of parts in the circumferential direction as a whole, so as to further reduce the influence of the magnetic flux on the core 100.

[0067] In some embodiments, the accommodation grooves 111 correspond to the number of the spacers 120 one by one, and the plurality of accommodation grooves 111 are uniformly distributed along the circumference of the magnetic conductor 110, so that the spacers 120 are uniformly distributed along the circumference of the magnetic conductor 110, so that the magnetic field distribution in the iron core 100 is more uniform, thereby improving the performance and efficiency of the motor. And the uniformly distributed spacers 120 can reduce eddy current loss and improve motor efficiency.

[0068] In some embodiments, the thickness of each spacer 120 is less than 1 mm. Since the thinner the spacer 120 is, the smaller the magnetic resistance is, the spacer 120 with a thickness less than 1 mm can improve the magnetic induction intensity, thereby improving the overall magnetic induction intensity of the iron core 100, thereby improving the efficiency and output power of the motor. And the thinner spacer 120 can shorten the eddy current path, thereby reducing the eddy current loss, which helps to reduce the temperature rise and energy consumption of the motor, and improves the reliability and efficiency of the motor.

[0069] In the iron core 100 provided in the present application, the end of the accommodation groove 111 away from the radial inner side wall of the magnetic conductor 110 is spaced apart from the radial outer side wall of the magnetic conductor 110, and / or the end of the accommodation groove 111 away from the radial outer side wall of the magnetic conductor 110 is spaced apart from the radial inner side wall of the magnetic conductor 110. In some embodiments, the radial outer side wall of the magnetic conductor 110 is spaced apart from the end of the accommodation groove 111 away from the radial inner side wall of the magnetic conductor 110; or the radial inner side wall of the magnetic conductor 110 is spaced apart from the end of the accommodation groove 111 away from the radial outer side wall of the magnetic conductor 110; or the radial outer side wall of the magnetic conductor 110 is spaced apart from the end of the accommodation groove 111 away from the radial inner side wall of the magnetic conductor 110, and the radial inner side wall of the magnetic conductor 110 is spaced apart from the end of the accommodation groove 111 away from the radial outer side wall of the magnetic conductor 110, thereby forming a whole annular structure of the magnetic conductor 110 for accommodating the spacers 120.

[0070] In some embodiments, the radial outer side wall of the magnetic conductor 110 is spaced apart from the end of the accommodation groove 111 away from the radial inner side wall of the magnetic conductor 110, so that the magnetic conductor 110 is not damaged when the radial outer side wall of the magnetic conductor 110 is machined or machined with other parts.

[0071] Please refer to FIG. 1, FIG. 2, FIG. 6 and FIG. 7, FIG. 6 is a structural schematic diagram of the body of an embodiment of the present application, and FIG. 7 is a top view and A-A sectional view of the iron core of an embodiment of the present application. In the iron core 100 provided in the present application, the iron core 100 further comprises an insulating shell 130, the insulating shell 130 is sleeved on the magnetic conductor 110, and the spacer 120 abuts against the inner wall of the insulating shell 130 close to the axial end face 112 of the magnetic conductor 110. In some embodiments, after the spacer 120 is accommodated in the magnetic conductor 110, the magnetic conductor 110 is partially wrapped or fully wrapped by the insulating shell 130 to prevent the spacer 120 from falling out of the magnetic conductor 110.

[0072] In some embodiments, when the accommodating groove 111 is recessed from the axial end face 112 of the magnet conductor 110, the insulating shell 130 is arranged on the end face 112, thereby limiting the partition plate 120 in the accommodating groove 111. When the accommodating groove 111 penetrates the magnet conductor 110 axially, the insulating shell 130 entirely wraps the magnet conductor 110. When the accommodating groove 111 penetrates the axial end face 112 and the radial outer side wall of the magnet conductor 110, the insulating shell 130 wraps the radial outer side wall and the axial end face 112 of the magnet conductor 110.

[0073] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings described, and are only intended to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0074] The above only discloses one preferred embodiment of the present application, of course cannot limit the scope of the present application, those skilled in the art can understand that the implementation of all or part of the above-mentioned processes, and the equivalent changes made according to the claims of the present application, still belong to the scope covered by the present application.

Claims

1. An iron core, wherein, include: A magnetic conductor, comprising a body and a first boss, the first boss being protruding from one end of the body along the axial direction, and the body being provided with a receiving groove; A spacer, which is housed in the receiving groove.

2. The core of claim 1, wherein, The first boss is disposed around the radial inner sidewall of the body, and the radial outer sidewall of the first boss is used for winding.

3. The core of claim 1, wherein, The spacer is insulated from the magnetic conductor.

4. The core of claim 3, wherein, An insulating layer is provided between the wall of the receiving groove and the outer surface of the partition.

5. The core of claim 4, wherein, The insulating layer is disposed on the wall of the receiving groove or on the outer surface of the partition.

6. The core of claim 1, wherein, The receiving groove extends radially along the magnetic conductor, the length direction of the partition is in the same direction as the radial direction of the magnetic conductor, and the width direction of the partition is in the same direction as the axial direction of the magnetic conductor.

7. The core of claim 1, wherein, The receiving groove is formed by a recess in the radial sidewall of the body or the axial end face of the body.

8. The core of claim 1, wherein, The receiving groove extends through the body along the axial direction of the magnetic conductor, one end face of the partition is flush with one end face of the body along the axial direction, and the other end face of the partition is flush with the other end face of the body along the axial direction.

9. The core of claim 1, wherein, The partition plate is interference-fitted with the receiving groove.

10. The core of any one of claims 1-9, wherein, The spacers are provided in multiple ways, and the main body is provided with multiple receiving grooves spaced apart along the circumference of the magnetic conductor, and each receiving groove accommodates at least one spacer.

11. The core of claim 10, wherein, The plurality of the receiving slots are evenly distributed along the circumference of the magnetic conductor.

12. The core of claim 10, wherein, Each of the aforementioned spacers is less than 1 mm thick.

13. The core of claim 1, wherein, The magnetic conductor also includes a second boss, which is located on one end of the body away from the first boss along the axial direction. The second boss is used to wind the winding.

14. A rotor, wherein, The rotor includes a plurality of iron cores as described in any one of claims 1-13, wherein the plurality of iron cores are stacked.

15. A stator, wherein, The stator includes windings and a plurality of iron cores as described in any one of claims 1-13, the windings being wound around the radial outer sidewall of the first boss.

16. The stator of claim 15, wherein, Multiple iron cores are stacked together.

17. An electric machine wherein, The motor includes a rotor as described in claim 14, or a stator as described in claim 15 or 16.

18. A suspension system wherein, The suspension system includes the motor as described in claim 17.

19. A vehicle, wherein, The vehicle includes the motor as described in claim 17, or the suspension system as described in claim 18.

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