Electric motors, powertrains and electric actuators

Abstract

This application relates to the field of motor technology and proposes a motor, powertrain, and electric device. The motor includes: a housing; a rotor assembly rotatable along a rotation axis; a stator assembly including at least two winding units arranged around the rotation axis; and a first heat sink, at least a portion of which extends between two adjacent winding units to conduct heat between the two winding units. In the motor provided by the embodiments of this application, the first heat sink conducts heat between adjacent winding units at locations close to each other and conducts at least a portion of the heat to the housing, thereby facilitating heat dissipation of the winding units. Simultaneously, this arrangement can increase the contact area between the first heat sink and the winding units, thereby improving the heat dissipation efficiency of the winding units and reducing the risk of damage to the winding units due to high temperatures.

Description

Technical Field

[0001] This application belongs to the field of electric motor technology, and particularly relates to an electric motor, powertrain, and electric device. Background Technology

[0002] Electrical equipment typically uses electric motors as a power source to perform corresponding actions. For example, vehicles such as electric vehicles use electric motors, such as induction motors and permanent magnet motors, to drive the vehicle and capture braking energy when used as generators.

[0003] During motor operation, the stator assembly continuously generates heat. As the heat increases, the stator assembly is prone to insulation failure, short circuits, winding unit failures, and other issues, which can easily lead to reduced motor efficiency or damage. Utility Model Content

[0004] In view of the above problems, this application provides an electric motor, powertrain, and electric device that can alleviate the problem of motor efficiency being affected by high-temperature damage to the stator assembly.

[0005] In a first aspect, embodiments of this application provide a motor, comprising:

[0006] Housing; rotor assembly, disposed within the housing, the rotor assembly being rotatable along a rotation axis; stator assembly, disposed within the housing, the stator assembly including at least two winding units arranged around the rotation axis; first heat sink, disposed within the housing, at least a portion of the first heat sink extending between two adjacent winding units to conduct heat between the two winding units.

[0007] In the technical solution of this embodiment, a first heat sink is provided, and at least a portion of the first heat sink extends between two adjacent winding units of the stator assembly, so as to conduct heat between the adjacent winding units in close proximity through the first heat sink, which facilitates heat dissipation of the winding units; at the same time, this arrangement can also increase the contact area between the first heat sink and the winding unit, thereby improving the heat dissipation efficiency of the winding unit and reducing the risk of damage to the winding unit due to high temperature.

[0008] In some embodiments, the first heat sink includes a first heat sink located between two adjacent winding units and abutting against the adjacent winding unit to exchange heat with the adjacent winding unit; the first heat sink is also connected to the housing to conduct heat from the winding unit to the housing.

[0009] The technical solution of this embodiment provides a specific structure for a first heat sink, which includes a first heat dissipation part located between two adjacent winding units, so as to conduct heat from the corresponding winding unit through the first heat dissipation part, thereby improving the heat dissipation effect of the corresponding winding unit, especially improving the heat dissipation effect of the parts where the two adjacent winding units are close to each other, thereby reducing the risk of damage to the winding unit due to high temperature; at the same time, the first heat dissipation part is connected to the housing so as to conduct heat from the parts where the two adjacent winding units are close to each other through the first heat dissipation part, and conduct at least a part of the heat to the housing.

[0010] In some embodiments, the first heat dissipation part is a heat-conducting structure.

[0011] In the technical solution of this embodiment, the first heat dissipation part is a heat-conducting structure so that the first heat dissipation part can better conduct heat on the corresponding winding unit, thereby improving the heat dissipation effect of the winding unit.

[0012] In some embodiments, the first heat sink further includes a second heat sink connected to the first heat sink portion, the second heat sink portion abutting against the side of the winding unit opposite to the rotation axis, and the second heat sink portion being connected to the housing.

[0013] The technical solution of this embodiment provides a specific structure for a first heat sink, which includes a second heat sink portion and abuts against the side of the winding unit away from the axis of rotation. This increases the contact area between the first heat sink and the corresponding winding unit, thereby enabling better heat conduction. The second heat sink portion is connected to the housing to further increase the contact area between the first heat sink and the housing, and to better transfer heat from the first heat sink to the housing, thereby improving the heat dissipation effect of the winding unit.

[0014] In some embodiments, the second heat dissipation part is a heat-conducting structure.

[0015] In the technical solution of this embodiment, the second heat dissipation part is a heat-conducting structure so that the second heat dissipation part can better conduct heat on the corresponding winding unit, thereby improving the heat dissipation effect of the winding unit.

[0016] In some embodiments, the first heat sink further includes a third heat sink connected to the first heat sink, the third heat sink protruding from the first heat sink in a direction away from the axis of rotation.

[0017] The technical solution of this embodiment provides some specific structures of the first heat sink, so that the first heat sink includes a third heat sink connected to the first heat sink, so that the heat on the first heat sink can be conducted to the third heat sink, thereby increasing the overall heat dissipation area of ​​the first heat sink and improving the heat dissipation effect.

[0018] In some embodiments, at least a portion of the third heat dissipation portion passes through the housing and extends outside the housing.

[0019] The technical solution of this embodiment further provides some specific structures of the first heat sink, so that at least part of the third heat sink passes through the housing, so that the third heat sink can exchange heat with the space outside the housing; the arrangement of the third heat sink enables the first heat sink to directly conduct some heat to the outside of the housing, which can reduce the temperature of the winding unit and the internal temperature of the entire motor, thereby better reducing the damage that high temperature may cause to the winding unit.

[0020] In some embodiments, the third heat dissipation part is a heat-conducting structure.

[0021] In this embodiment, the third heat dissipation part is a heat-conducting structure, so that the third heat dissipation part can better conduct heat from the first heat dissipation part and better exchange heat with the external environment, thereby improving the heat dissipation effect of the winding unit.

[0022] In some embodiments, the number of first heat sinks is one, and the first heat sink includes at least two first heat dissipation sections.

[0023] In the technical solution of this embodiment, the first heat sink is an integral structure and includes at least two first heat sink parts, so that different first heat sink parts correspond to the gaps of each adjacent winding unit, thereby enabling the first heat sink to better dissipate heat from the stator assembly; at the same time, it facilitates the processing of the first heat sink.

[0024] In some embodiments, the number of first heat sinks is at least two, and each first heat sink includes a second heat sink portion and at least one first heat sink portion; the second heat sink portions of two adjacent first heat sinks are spaced apart.

[0025] In the technical solution of this embodiment, the number of first heat sinks is multiple. At this time, each first heat sink may also have only one second heat sink and one or a few first heat sinks, so as to facilitate the installation of each first heat sink.

[0026] In some embodiments, the motor further includes a second heat sink, at least a portion of which is housed within a housing. The second heat sink is disposed around the rotation axis on the periphery of the stator assembly. One side of the second heat sink is connected to the first heat sink, and the other side of the second heat sink is connected to the housing, so as to conduct heat from the first heat sink to the housing.

[0027] In the technical solution of this embodiment, a second heat sink is provided around the stator assembly, and the heat on the first heat sink is conducted to the housing through the second heat sink to reduce the temperature of the stator assembly. At the same time, the second heat sink can also help fix the stator assembly and the first heat sink.

[0028] In some embodiments, the second heat sink includes a fourth heat sink portion disposed around the periphery of the stator assembly; the second heat sink also includes a fifth heat sink portion connected to the fourth heat sink portion, at least a portion of the fifth heat sink portion passing through the housing and extending outside the housing.

[0029] The technical solution of this embodiment provides some specific structures of the second heat sink, such that the second heat sink includes a fourth heat sink section to conduct heat from the first heat sink and assist in fixing the stator assembly and the first heat sink; a fifth heat sink section is provided, and at least part of the fifth heat sink section passes through the housing so that the fifth heat sink section can exchange heat with the space outside the housing, which can reduce the temperature of the winding unit and the internal temperature of the entire motor, thereby better reducing the damage that high temperature may cause to the winding unit.

[0030] In some embodiments, the second heat sink is a heat-conducting structure.

[0031] In the technical solution of this embodiment, the second heat sink is a heat-conducting structure, so that the second heat sink can better conduct heat on the first heat sink and better exchange heat with the housing, thereby improving the heat dissipation effect of the stator assembly.

[0032] In some embodiments, the motor further includes a fixing structure connected to the winding unit and the first heat sink to fix the winding unit and the first heat sink; the fixing structure is also connected to the housing to conduct heat from the winding unit and the first heat sink to the housing.

[0033] In the technical solution of this embodiment, a fixing structure is provided to fix the first heat sink and the winding unit; at the same time, the fixing structure is also connected to the housing so that the fixing structure can also conduct some of the heat on the winding unit and the first heat sink to the housing, thereby improving the heat dissipation efficiency of the stator assembly.

[0034] In some embodiments, the fixing structure is a thermally conductive structure.

[0035] In this embodiment, the fixing structure is made into a heat-conducting structure so that the fixing structure can better conduct heat from the winding unit and the first heat sink, and can better exchange heat with the housing, thereby improving the heat dissipation effect of the stator assembly.

[0036] In some embodiments, the fixing structure is an injection-molded structure or a potting structure.

[0037] The technical solution of this embodiment provides some specific structures for fixing structures, making the fixing structure an injection-molded structure or a potting structure, so that the fixing structure can have high integrity and high strength, rigidity and protective performance.

[0038] In some embodiments, the winding unit includes a magnetic core and a coil disposed around the magnetic core, the coil being arranged in a direction parallel to the axis of rotation; at least a portion of the first heat sink abuts against an adjacent coil.

[0039] The technical solution of this embodiment provides a specific structure of some winding units, and at least a portion of the first heat sink abuts against the coil so as to conduct the heat generated on the coil through the first heat sink.

[0040] In some embodiments, at least two winding units form an inner space around a rotation axis; the coil includes an output end and an input end, both of which extend into the inner space.

[0041] The technical solution of this embodiment further provides a structure for some winding units, so that the input end and output end of the coil are both located in the inner space of the stator assembly, so that the first heat sink does not need to be placed on the outer ring of the stator assembly to avoid the cable, thereby increasing the contact area between the first heat sink and the winding unit and improving the heat dissipation effect of the stator assembly.

[0042] In some embodiments, the size of the coil is smaller than the size of the magnetic core in a direction parallel to the axis of rotation; a portion of the first heat sink abuts against the magnetic core.

[0043] The technical solution of this embodiment further provides a structure for some winding units, in which a portion of the first heat sink abuts against the magnetic core, so as to conduct heat on the magnetic core through the first heat sink, thereby further reducing the overall temperature of the winding unit and improving the heat dissipation effect of the winding unit.

[0044] In some embodiments, the stator assembly is disposed on one side of the rotor assembly along the rotation axis.

[0045] The technical solution of this embodiment provides some arrangement relationships of stator and rotor assemblies, so that the stator and rotor assemblies are arranged along the rotation axis, so that the motor is an axial motor, thereby enabling the motor to have a smaller size and greater torque.

[0046] Secondly, embodiments of this application also provide a powertrain, including the motor provided in some embodiments of the first aspect.

[0047] Thirdly, embodiments of this application also provide an electric device, including a motor provided in some embodiments of the first aspect; or a powertrain provided in some embodiments of the second aspect.

[0048] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0049] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0050] Figure 1 A cross-sectional schematic diagram of an electric motor provided for some embodiments of this application;

[0051] Figure 2 A cross-sectional schematic diagram of a motor provided for other embodiments of this application;

[0052] Figure 3 This is a front view schematic diagram of a stator assembly and a first heat sink provided in some embodiments of this application;

[0053] Figure 4 A perspective view of a stator assembly and a first heat sink provided in some embodiments of this application;

[0054] Figure 5 Front view schematic diagram of the stator assembly and the first heat sink provided for other embodiments of this application;

[0055] Figure 6 A perspective view of the stator assembly and the first heat sink provided for other embodiments of this application;

[0056] Figure 7 Front view schematic diagram of a stator assembly, a first heat sink, and a second heat sink provided in some embodiments of this application;

[0057] Figure 8 This is a front view schematic diagram of a stator assembly, a first heat sink, and a second heat sink provided for other embodiments of this application.

[0058] The markings in the diagram mean:

[0059] 100. Electric motor;

[0060] 10. Shell;

[0061] 20. Rotor assembly; 201. Rotation axis;

[0062] 30. Stator assembly; 301. Internal space; 31. Winding unit; 311. Magnetic core; 312. Coil;

[0063] 40. First heat sink; 41. First heat sink section; 42. Second heat sink section; 43. Third heat sink section;

[0064] 50. Second heat sink; 51. Fourth heat sink; 52. Fifth heat sink;

[0065] 60. Motor shaft. Detailed Implementation

[0066] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0067] 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0068] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0069] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0070] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0071] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0072] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0073] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0074] An electric motor is a device that converts electrical energy into mechanical energy or vice versa, and is widely used in industry, transportation, and energy sectors. Based on differences in magnetic field direction and structure, current electric motors are generally classified into radial motors and axial motors. Radial motors typically employ a cylindrical design, with the magnetic field distributed along the radial direction, and the winding units and rotor transmitting torque through a radial air gap. Axial motors, on the other hand, use a flattened structure, with the magnetic field distributed along the axis of rotation. The winding units and rotor are arranged in a disc-like configuration, resulting in a shorter magnetic circuit and higher power density. They are particularly suitable for space-constrained high-torque applications, such as in-wheel motors in electric vehicles and drone propulsion systems. Due to their lightweight and high-efficiency advantages, axial motors are gradually becoming a research hotspot in high-end power systems.

[0075] Although axial motors have significant advantages in terms of lightweight and high efficiency, their compact structure and unique electromagnetic design also lead to some shortcomings. Among them, thermal management is one of the key factors restricting their performance and reliability. That is, during the operation of current axial motors, the winding unit generates a lot of heat, which restricts the performance and efficiency of axial motors.

[0076] Among thermal management issues, stator assembly heating is a particularly prominent problem. On the one hand, to achieve high power density, the winding coils of the winding unit typically need to carry a large current, resulting in high resistance losses. Furthermore, hysteresis and eddy current losses in the magnetic core can easily lead to excessively high local temperatures in the winding unit. The flat structure limits the heat dissipation area of ​​the winding coils, making it difficult to quickly dissipate heat. On the other hand, bearing friction can easily lead to excessively high local temperatures in adjacent winding units, and friction between the rotor and stator assemblies can also cause excessively high local temperatures in the winding units. If heat cannot be effectively dissipated, it will trigger a chain reaction of problems: insulation materials will age faster due to prolonged overheating, leading to short-circuit risks; permanent magnets are prone to irreversible demagnetization at high temperatures, causing torque attenuation or even functional failure; in addition, accumulated thermal stress may cause stator assembly deformation, disrupting air gap uniformity and ultimately affecting motor lifespan and operational stability.

[0077] Based on the above considerations, in order to alleviate the problem of high-temperature damage to the stator assembly and the problem of low efficiency of the motor caused by high temperature, this application provides a motor including a housing, a rotor assembly, a stator assembly, and a first heat sink. The stator assembly includes at least two winding units, and at least a portion of the first heat sink extends between two adjacent winding units, connecting the first heat sink to the housing to conduct heat from the corresponding winding unit to the housing.

[0078] In such a motor, the first heat sink can conduct heat between two adjacent winding units to reduce the risk of heat concentration in that area and improve the heat dissipation performance of the winding unit. At the same time, the design can also increase the contact area between the first heat sink and the winding unit, thereby improving the heat dissipation efficiency of the winding unit, reducing the risk of damage to the winding unit due to high temperature, and reducing the risk of reduced motor efficiency due to high temperature.

[0079] The motor mentioned in the embodiments of this application can be applied to a powertrain as a power source; it can also be applied to electric equipment as a power source. The powertrain mentioned in the embodiments of this application can also be applied to electric equipment as a power source.

[0080] Electrical devices can include, but are not limited to, electric toys, power tools, electric bicycles, electric motorcycles, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0081] Electric devices can also be vehicles or vehicle chassis. Vehicles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. In these systems, the motor can be integrated with one or more components such as a power supply, controller, and transmission to form a powertrain.

[0082] To illustrate the technical solutions described in this application, the following description is provided in conjunction with specific accompanying drawings and embodiments.

[0083] Firstly, reference Figures 1 to 4 This application provides an electric motor 100, including a housing 10, a rotor assembly 20, a stator assembly 30, and a first heat sink 40. The rotor assembly 20 is disposed within the housing 10 and is rotatable along a rotation axis 201. The stator assembly 30 is disposed within the housing 10 and includes at least two winding units 31 arranged around the rotation axis 201. The first heat sink 40 is disposed within the housing 10, and at least a portion of the first heat sink 40 extends between two adjacent winding units 31 to conduct heat between the two winding units 31.

[0084] The housing 10 refers to the structure in the motor 100 used to form the internal environment and provide a mounting base for other structures of the motor 100. The rotor assembly 20, stator assembly 30 and first heat sink 40 are housed in the housing 10. The housing 10 can be a cylindrical structure, a prismatic structure or other shapes. The material of the housing 10 can include metal, plastic or other materials.

[0085] The housing 10 has a receiving space, in which the rotor assembly 20, the stator assembly 30 and the first heat sink 40 are all received. The receiving space can be a cuboid space, a cylindrical space or other shapes, and the shape of the receiving space can also be set according to the shape of the housing 10.

[0086] The rotor assembly 20 refers to the structure in the motor 100 used to convert electrical energy into mechanical energy. The rotor assembly 20 can rotate under the action of the magnetic field inside the motor 100 and can drive the motor shaft 60 to rotate to output mechanical energy. The rotor assembly 20 may include structures such as rotor core 311, windings or permanent magnets.

[0087] Rotation axis 201 refers to a virtual line in motor 100. Rotor assembly 20 can rotate around rotation axis 201 to output mechanical energy. In the case where motor 100 includes motor shaft 60, rotation axis 201 can be the axis of motor shaft 60.

[0088] The stator assembly 30 refers to the structure in the motor 100 used to generate a magnetic field. The stator assembly 30 can generate a magnetic field when energized to drive the rotor assembly 20 to rotate. Depending on the form of the coils 312 on the stator assembly 30, the stator assembly 30 can be a concentrated winding coil 312 structure or a distributed winding coil 312 structure.

[0089] The winding unit 31 is the smallest unit in the stator assembly 30 used to form a magnetic field. The winding unit 31 may include a winding coil, an iron core, or other structures. The stator assembly 30 includes at least two winding units 31. The number of winding units 31 may be two, three, or more. When the number of stator assemblies 30 is at least two, the at least two stator assemblies 30 may be arranged around the rotation axis 201. The arrangement trajectory of the at least two winding units 31 may be a circular ring, a square ring, or other shape arranged circumferentially around the rotation axis 201, thereby forming a structure of a disk, a ring, a square ring, or other shapes.

[0090] The first heat sink 40 refers to the structure in the motor 100 used for heat exchange with the stator assembly 30. The first heat sink 40 can be a sheet structure, a block structure, or a structure of other shapes. The shape of the first heat sink 40 can be square, round, or other regular shapes, or it can be T-shaped, U-shaped, or other irregular shapes. The material of the first heat sink 40 can include plastic, metal, or other materials.

[0091] At least a portion of the first heat sink 40 extends between two adjacent winding units 31. The portion of the first heat sink 40 corresponding to the winding unit 31 can exchange heat with the corresponding winding unit 31 to reduce the temperature of the corresponding winding unit 31. The first heat sink 40 can be connected to the adjacent winding unit 31 by bonding, snapping or other means. The first heat sink 40 can also abut against two adjacent winding units 31. In this case, the two adjacent winding units 31 clamp the portion of the first heat sink 40 located between the two winding units 31. The first heat sink 40 can also conduct heat on the corresponding winding unit 31 in other ways.

[0092] Because the heat dissipation space on the side where two adjacent winding units 31 are close to each other or facing each other is small, and the heat of the two winding units 31 is concentrated in this part, the heat is relatively concentrated and the temperature rises rapidly, which can easily lead to a high temperature; therefore, at least a part of the first heat sink 40 can extend between the two adjacent winding units 31, so as to conduct at least a part of the concentrated heat in this part through the first heat sink 40, thereby reducing the temperature of this part and the rate of temperature rise.

[0093] Meanwhile, the heat on the winding unit 31 can be conducted through the first heat sink 40 to reduce the heat conducted from the winding unit 31 to the adjacent winding unit 31. At this time, the first heat sink 40 can also prevent heat from being conducted between different winding units 31, thereby better alleviating the heat concentration situation.

[0094] Since the stator assembly 30 includes at least two winding units 31, a partial structure of the first heat sink 40 can be provided between every two adjacent winding units 31, or a partial structure of the first heat sink 40 can be provided only between a few adjacent winding units 31.

[0095] Depending on the structure of the first heat sink 40, the number of the first heat sink 40 can be one, two or more; when the number of the first heat sink 40 is one, different parts of the first heat sink 40 can extend to different winding units 31 respectively; when the number of the first heat sink 40 is two or more, different first heat sinks 40 can be disposed between different winding units 31.

[0096] In this embodiment, a first heat sink 40 is provided, and at least a portion of the first heat sink 40 extends between two adjacent winding units 31 of the stator assembly 30. This allows the heat sink 40 to conduct heat from the adjacent winding units 31 that are close to each other, facilitating heat dissipation of the winding units 31. At the same time, this arrangement can also increase the contact area between the first heat sink 40 and the winding units 31, thereby improving the heat dissipation efficiency of the winding units 31 and reducing the risk of damage to the winding units 31 due to high temperatures.

[0097] refer to Figure 3 , Figure 4 In some embodiments, the first heat sink 40 includes a first heat sink 41 located between two adjacent winding units 31 and abutting against the adjacent winding unit 31 for heat exchange with the adjacent winding unit 31; the first heat sink 41 is also connected to the housing 10 to conduct the heat of the winding unit 31 to the housing 10.

[0098] The first heat dissipation part 41 refers to the portion of the first heat dissipation component 40 located between two adjacent winding units 31. The first heat dissipation part 41 can abut against the adjacent winding unit 31 and exchange heat with the adjacent winding unit 31 to conduct heat from the winding unit 31 and reduce the temperature of the winding unit 31. The shape of the first heat dissipation part 41 can be square, circular, prismatic, or other shapes. A first heat dissipation component 40 may include only one first heat dissipation part 41 or two or more first heat dissipation parts 41. The material of the first heat dissipation part 41 may include metal, plastic, or other materials.

[0099] The first heat sink 40 may include only the first heat sink 41, or it may include other structures besides the first heat sink 41. If the first heat sink 40 includes other structures, the first heat sink 40 may also exchange heat with other parts of the winding unit 31.

[0100] The first heat dissipation part 41 is also connected to the housing 10 so that at least part of the heat of the first heat dissipation part 41 can be transferred to the housing 10, and the housing 10 can exchange heat with the outside, and the heat on the housing 10 can dissipate to the outside; that is, the heat on the winding unit 31 can be conducted to the housing 10 through the first heat dissipation part 41, and finally exchange heat with the outside and dissipate to the outside; the first heat dissipation part 41 can simply abut against the housing 10 or be in contact with the housing 10, or it can be connected to the housing 10 by bonding, fastening, snapping, screwing or other means; the first heat dissipation part 41 can be directly connected to the housing 10, or it can be indirectly connected to the housing 10 through an intermediate structure.

[0101] Since the first heat sink 40 is connected to the housing 10, if the first heat sink 40 only includes the first heat sink 41, the first heat sink 41 can be connected to the housing 10. If the first heat sink 40 also includes other structures, the first heat sink 40 can be connected to the housing 10 through other structures.

[0102] Because the heat dissipation space on the side where two adjacent winding units 31 are close to or facing each other is small, and the heat of the two winding units 31 is concentrated in this area, the heat is relatively concentrated, the temperature rises rapidly, and it is prone to high temperature; therefore, the first heat dissipation part 41 is located between two adjacent winding units 31, so as to conduct at least a portion of the concentrated heat in this area through the first heat dissipation part 41, thereby reducing the temperature of this area and the rate of temperature rise. At the same time, the first heat dissipation member 40 can also conduct the heat on the first heat dissipation part 41 to the housing 10, so as to dissipate the heat to the external environment.

[0103] This embodiment provides a specific structure for the first heat sink 40, which includes a first heat dissipation portion 41 located between two adjacent winding units 31. The first heat dissipation portion 41 conducts heat from the corresponding winding unit 31, thereby improving the heat dissipation effect of the corresponding winding unit 31, especially improving the heat dissipation effect of the adjacent two winding units 31 that are close to each other, thereby reducing the risk of damage to the winding unit 31 due to high temperature. At the same time, the first heat dissipation portion 41 is connected to the housing 10, so as to conduct heat from the adjacent two winding units 31 that are close to each other through the first heat dissipation portion 41, and conduct at least a portion of the heat to the housing 10.

[0104] In some embodiments, the first heat dissipation part 41 is a heat-conducting structure.

[0105] The first heat dissipation part 41 is a heat-conducting structure, so that the first heat dissipation part 41 can better exchange heat with the adjacent winding unit 31, and the first heat dissipation part 41 can better conduct heat.

[0106] The first heat dissipation part 41 is a heat-conducting structure, that is, the material of the first heat dissipation part 41 includes a heat-conducting material; for example, the material of the first heat dissipation part 41 may include one or more of metal, ceramic, carbon-based materials or other materials with good thermal conductivity. For example, the material of the first heat dissipation part 41 may only include metal and form a metal structural component, or the material of the first heat dissipation part 41 may only include ceramic and form a ceramic structural component.

[0107] For example, the material of the first heat dissipation part 41 may include silver, copper, gold, aluminum, tungsten, aluminum alloy, copper alloy or other metals and alloys.

[0108] For example, the material of the first heat sink 41 may include aluminum nitride, silicon carbide, boron nitride, or other ceramic materials.

[0109] For example, the material of the first heat dissipation part 41 may include graphite, graphene, diamond, carbon fiber or other carbon-based materials.

[0110] For example, while the first heat dissipation part 41 is a heat-conducting structure, it can also be an insulating structure to reduce the risk of short circuit between the winding unit 31 and the first heat dissipation part 41. In this case, the material of the first heat dissipation part 41 can have both heat-conducting and insulating properties. For example, the material of the first heat dissipation part 41 can include one or more of alumina, aluminum nitride, boron nitride, glass fiber, epoxy resin, silicon carbide or other insulating and heat-conducting materials.

[0111] In this embodiment, the first heat dissipation part 41 is a heat-conducting structure so that the first heat dissipation part 41 can better conduct heat on the corresponding winding unit 31, thereby improving the heat dissipation effect of the winding unit 31.

[0112] refer to Figure 3 , Figure 4 In some embodiments, the first heat sink 40 further includes a second heat sink 42 connected to the first heat sink 41. The second heat sink 42 abuts against the side of the winding unit 31 opposite to the rotation axis 201, and the second heat sink 42 is connected to the housing 10.

[0113] The second heat dissipation part 42 refers to a portion of the structure in the first heat dissipation component 40. Unlike the first heat dissipation part 41, the second heat dissipation part 42 can contact other parts of the winding unit 31 to conduct heat from the winding unit 31. The shape of the second heat dissipation part 42 can be square, circular, prismatic, or other shapes. The second heat dissipation part 42 is connected to the first heat dissipation part 41 by welding, bonding, screwing, snapping, or other means. The second heat dissipation part 42 can also be integrally formed with the first heat dissipation part 41. A first heat dissipation component 40 may include only one second heat dissipation part 42 or two or more second heat dissipation parts 42. In a first heat dissipation component 40, depending on the number of first heat dissipation parts 41 and second heat dissipation parts 42, the second heat dissipation part 42 can be connected to one first heat dissipation part 41 or two or more first heat dissipation parts 41. The material of the second heat dissipation part 42 can include metal, plastic, or other materials.

[0114] The second heat dissipation part 42 abuts against the side of the winding unit 31 away from the rotation axis 201. The second heat dissipation part 42 can completely cover the side of the winding unit 31 away from the rotation axis 201, or it can only cover the part of the winding unit 31 away from the rotation axis 201. Since the winding unit 31 is arranged around the rotation axis 201, that is, the second heat dissipation part 42 abuts against the outside of the winding unit 31 to conduct heat on the part of the winding unit 31 near the outside. At this time, the second heat dissipation part 42 can cooperate with the first heat dissipation part 41 to better conduct heat on the winding unit 31 and reduce the temperature of the winding unit 31.

[0115] The second heat dissipation part 42 is also connected to the housing 10. The second heat dissipation part 42 can be connected to the housing 10 by welding, bonding, screwing, snapping or other means. The second heat dissipation part 42 can also simply abut against the housing 10 and be fixed relative to the housing 10 by interference fit or other means. The side of the second heat dissipation part 42 away from the winding unit 31 can be connected to the housing 10, or other positions of the second heat dissipation part 42 can be connected to the housing 10. For example, the side of the second heat dissipation part 42 away from the winding unit 31 abuts against the housing 10.

[0116] The second heat dissipation part 42 can conduct at least a portion of its heat to the housing 10, and the housing 10 can exchange heat with the outside to dissipate the heat on the housing 10; at the same time, the second heat dissipation part 42 is also connected to the first heat dissipation part 41, and the heat on the first heat dissipation part 41 can also be conducted to the housing 10 through the second heat dissipation part 42.

[0117] For example, depending on the shape of the winding unit 31 and the housing 10, the second heat dissipation part 42 can be an arc-shaped plate structure, with one arc surface of the second heat dissipation part 42 abutting against the winding unit 31 and the other arc surface of the second heat dissipation part 42 abutting against the housing 10.

[0118] In the arrangement direction of the winding unit 31, the two sides of the winding unit 31 may be respectively provided with the same first heat sink 40 or different first heat sinks 40. At the same time, the side of the winding unit 31 away from the rotation axis 201 may also be provided with the same first heat sink 40 or different first heat sinks 40. In this case, the three different sides of the winding unit 31 are in contact with the same or different first heat sinks 40, and the contact area between the winding unit 31 and the first heat sink 40 is large, so that the first heat sink 40 can better conduct the heat on the winding unit 31 and better reduce the temperature of the winding unit 31.

[0119] This embodiment provides a specific structure for the first heat sink 40, which includes a second heat sink 42. The second heat sink 42 abuts against the side of the winding unit 31 away from the rotation axis 201, thereby increasing the contact area between the first heat sink 40 and the corresponding winding unit 31, so that the heat sink 40 can conduct heat better. The second heat sink 42 is connected to the housing 10, so that the contact area between the first heat sink 40 and the housing 10 can be increased, and the first heat sink 40 can transfer heat to the housing 10 better, thereby improving the heat dissipation effect of the winding unit 31.

[0120] In some embodiments, the second heat dissipation part 42 is a heat-conducting structure.

[0121] The second heat dissipation part 42 is a heat-conducting structure, so that the second heat dissipation part 42 can better exchange heat with the adjacent winding unit 31, and the second heat dissipation part 42 can better conduct heat.

[0122] The second heat dissipation part 42 is a heat-conducting structure, that is, the material of the second heat dissipation part 42 includes a heat-conducting material. The material of the second heat dissipation part 42 can be the same as or different from the material of the first heat dissipation part 41. For example, the material of the second heat dissipation part 42 can include one or more of metal, ceramic, carbon-based materials or other materials with good thermal conductivity. For example, the material of the second heat dissipation part 42 can include only metal and form a metal structure, or the material of the second heat dissipation part 42 can include only ceramic and form a ceramic structure.

[0123] For example, the material of the second heat dissipation part 42 may include silver, copper, gold, aluminum, tungsten, aluminum alloy, copper alloy or other metals and alloys.

[0124] For example, the material of the second heat dissipation part 42 may include aluminum nitride, silicon carbide, boron nitride or other ceramic materials.

[0125] For example, the material of the second heat dissipation part 42 may include graphite, graphene, diamond, carbon fiber or other carbon-based materials.

[0126] For example, while the second heat dissipation part 42 is a heat-conducting structure, it can also be an insulating structure to reduce the risk of short circuit between the winding unit 31 and the second heat dissipation part 42. In this case, the material of the second heat dissipation part 42 can have both heat-conducting and insulating properties. For example, the material of the second heat dissipation part 42 can include one or more of alumina, aluminum nitride, boron nitride, glass fiber, epoxy resin, silicon carbide or other insulating and heat-conducting materials.

[0127] In the technical solution of this embodiment, the second heat dissipation part 42 is a heat-conducting structure so that the second heat dissipation part 42 can better conduct heat on the corresponding winding unit 31, thereby improving the heat dissipation effect of the winding unit 31.

[0128] refer to Figure 5 , Figure 6 In some embodiments, the first heat sink 40 further includes a third heat sink 43 connected to the first heat sink 41, the third heat sink 43 protruding from the first heat sink 41 in a direction away from the rotation axis 201.

[0129] The third heat dissipation part 43 refers to a portion of the structure in the first heat dissipation component 40; the shape of the third heat dissipation part 43 can be square, circular, prismatic, or other shapes; the third heat dissipation part 43 is connected to the first heat dissipation part 41, either directly or indirectly through an intermediate structure; the third heat dissipation part 43 can be connected to the first heat dissipation part 41 by welding, bonding, screwing, snapping, or other methods, and can also be integrally formed with the first heat dissipation part 41; in a first heat dissipation component 40, the number of third heat dissipation parts 43 can be one or more; when the first heat dissipation component 40 includes a second heat dissipation part 42, the third heat dissipation part 43 can be connected to the second heat dissipation part 42; the material of the third heat dissipation part 43 can include metal, plastic, or other materials.

[0130] The third heat dissipation part 43 protrudes from the first heat dissipation part 41 in a direction away from the rotation axis 201, that is, the third heat dissipation part 43 extends from the first heat dissipation part 41 in a direction away from the rotation axis 201 to increase the heat dissipation area of ​​the first heat dissipation member 40; when the first heat dissipation member 40 includes the first heat dissipation part 41 and the second heat dissipation part 42, the third heat dissipation part 43 extends from the second heat dissipation part 42 in a direction away from the rotation axis 201 to increase the heat dissipation area of ​​the first heat dissipation member 40.

[0131] This embodiment provides some specific structures of the first heat sink 40, such that the first heat sink 40 includes a third heat sink 43 connected to the first heat sink 41, so that the heat on the first heat sink 41 can be conducted to the third heat sink 43.

[0132] refer to Figure 5 , Figure 6 In some embodiments, at least a portion of the third heat dissipation portion 43 passes through the housing 10 and extends outside the housing 10.

[0133] At least a portion of the third heat dissipation part 43 passes through the housing 10 and extends outside the housing 10, meaning that at least a portion of the third heat dissipation part 43 can be located outside the housing 10. The portion of the third heat dissipation part 43 located outside the housing 10 can exchange heat with the outside to reduce the temperature on the third heat dissipation part 43. At the same time, since the third heat dissipation part 43 is connected to the first heat dissipation part 41, the heat on the first heat dissipation part 41 can also be conducted to the third heat dissipation part 43 and can be dissipated to the outside through the third heat dissipation part 43. That is, the heat on the first heat dissipation part 40 can all be dissipated to the outside through the third heat dissipation part 43, thereby better reducing the temperature of the winding unit 31 and reducing the internal temperature of the motor 100.

[0134] It is understandable that the third heat dissipation part 43 passes through the housing 10, that is, the housing 10 is provided with a hole structure or groove structure that allows the third heat dissipation part 43 to pass through.

[0135] This embodiment further provides some specific structures of the first heat sink 40, so that at least a portion of the third heat sink 43 passes through the housing 10, so that the third heat sink 43 can exchange heat with the space outside the housing 10; the arrangement of the third heat sink 43 enables the first heat sink 40 to directly conduct some heat to the outside of the housing 10, which can reduce the temperature of the winding unit 31 and the internal temperature of the entire motor 100, thereby better reducing the damage that high temperature may cause to the winding unit 31.

[0136] In some embodiments, the third heat dissipation part 43 is a heat-conducting structure.

[0137] The third heat dissipation part 43 is a heat-conducting structure, so that the third heat dissipation part 43 can better conduct heat.

[0138] The third heat dissipation part 43 is a heat-conducting structure, that is, the material of the third heat dissipation part 43 includes a heat-conducting material. The material of the third heat dissipation part 43 can be the same as or different from the material of the first heat dissipation part 41. For example, the material of the third heat dissipation part 43 can include one or more of metal, ceramic, carbon-based materials or other materials with good thermal conductivity. For example, the material of the third heat dissipation part 43 can include only metal and form a metal structure, or the material of the third heat dissipation part 43 can include only ceramic and form a ceramic structure.

[0139] For example, the material of the third heat dissipation part 43 may include silver, copper, gold, aluminum, tungsten, aluminum alloy, copper alloy or other metals and alloys.

[0140] For example, the material of the third heat sink 43 may include aluminum nitride, silicon carbide, boron nitride, or other ceramic materials.

[0141] For example, the material of the third heat dissipation part 43 may include graphite, graphene, diamond, carbon fiber or other carbon-based materials.

[0142] For example, while the third heat dissipation part 43 is a heat-conducting structure, it can also be an insulating structure to reduce the risk of short circuit between the winding unit 31 and the third heat dissipation part 43. In this case, the material of the third heat dissipation part 43 can have both heat-conducting and insulating properties. For example, the material of the third heat dissipation part 43 can include one or more of alumina, aluminum nitride, boron nitride, glass fiber, epoxy resin, silicon carbide or other insulating and heat-conducting materials.

[0143] In this embodiment, the third heat dissipation part 43 is a heat-conducting structure, so that the third heat dissipation part 43 can better conduct heat on the first heat dissipation part 41 and can better exchange heat with the external environment, thereby improving the heat dissipation effect of the winding unit 31.

[0144] In some embodiments, the number of first heat sinks 40 is one, and the first heat sink 40 includes at least two first heat sink sections 41.

[0145] The number of first heat sinks 40 is one, and the first heat sink 40 includes at least two first heat sink parts 41. At this time, the first heat sink 40 may include two first heat sink parts 41, or it may include three or more first heat sink parts 41. At least two first heat sink parts 41 may be located between two different adjacent winding units 31.

[0146] For example, since the winding unit 31 is arranged around the rotation axis 201, the gap between two adjacent winding units 31 is the same as the number of winding units 31. Accordingly, the number of first heat dissipation parts 41 can also be the same as the number of winding units 31, so that a first heat dissipation part 41 can be provided between any two adjacent winding units 31, thereby enabling the first heat dissipation part 40 to better and more comprehensively exchange heat with the stator assembly 30.

[0147] The motor 100 includes a heat sink, and each of the first heat sinks 41 is a part of the same first heat sink 40, which facilitates processing and transportation, and also improves the temperature uniformity of each part of the first heat sink 40.

[0148] In this embodiment, the first heat sink 40 is an integral structure and includes at least two first heat sink portions 41, so that different first heat sink portions 41 correspond to the gaps of each adjacent winding unit 31, thereby enabling the first heat sink 40 to better dissipate heat from the stator assembly 30; at the same time, it facilitates the processing of the first heat sink 40.

[0149] refer to Figures 3 to 6 In some embodiments, the number of first heat sinks 40 is at least two, and each first heat sink 40 includes a second heat sink 42 and at least one first heat sink 41; the second heat sinks 42 of two adjacent first heat sinks 40 are spaced apart.

[0150] The number of the first heat sink 40 is at least two, that is, the number of the first heat sink 40 can be two, or three or more.

[0151] When there are two first heat sinks 40, each first heat sink 40 may include only one first heat sink 41, or it may include two or more first heat sinks 41.

[0152] When the first heat sink 40 includes a second heat sink 42, a single first heat sink 40 may include a second heat sink 42, which may be connected to only one first heat sink 41 or to two or more first heat sinks 41.

[0153] Since there are two first heat sinks 40, each first heat sink 40 may include a few first heat sinks 41, so that each different first heat sink 41 can be located between two different adjacent winding units 31.

[0154] When the first heat sink 40 includes a second heat sink 42 and a third heat sink 43, a single first heat sink 40 may include a second heat sink 42, which may be connected to only one third heat sink 43, or may be connected to two or more third heat sinks 43.

[0155] For example, a first heat sink 40 includes a second heat sink 42, with a first heat sink 41 connected to one side of the second heat sink 42 and a third heat sink 43 connected to the other side. In this case, the first heat sink 41 of the first heat sink 40 is located between two adjacent winding units 31, and the second heat sink 42 of the first heat sink 40 abuts against the side of the corresponding two winding units 31 facing away from the rotation axis 201. Because the winding units 31 are arranged around the rotation axis 201, the gap between two adjacent winding units 31 is the same as the number of winding units 31. Therefore, the number of first heat sinks 40 is the same as the number of winding units 31, allowing each first heat sink 40 to exchange heat with the stator assembly 30 more effectively and comprehensively.

[0156] In this embodiment, the number of first heat sinks 40 is multiple. Each first heat sink 40 may have only one second heat sink 42 and one or a few first heat sinks 41, so as to facilitate the installation, disassembly and replacement of each first heat sink 40.

[0157] refer to Figure 7 In some embodiments, the motor 100 further includes a second heat sink 50, at least a portion of which is housed within the housing 10. The second heat sink 50 is disposed around the rotation axis 201 on the periphery of the stator assembly 30. One side of the second heat sink 50 is connected to the first heat sink 40, and the other side of the second heat sink 50 is connected to the housing 10 to conduct heat from the first heat sink 40 to the housing 10.

[0158] The second heat sink 50 refers to the structure in the motor 100 used for heat exchange with the first heat sink 40. The second heat sink 50 is disposed around the rotation axis 201 on the periphery of the stator assembly 30, that is, the second heat sink 50 is arranged around the periphery of the stator assembly 30 on the outside of the stator assembly 30. At this time, the second heat sink 50 can also play the role of assisting in fixing the winding unit 31 and the first heat sink 40. The material of the second heat sink 50 may include plastic, metal or other materials.

[0159] At least a portion of the second heat sink 50 is housed within the housing 10, meaning that the second heat sink 50 can be completely housed within the housing 10, or a portion of the second heat sink 50 can extend outside the housing 10, thereby enabling the second heat sink 50 to exchange heat with the external environment.

[0160] One side of the second heat sink 50 is connected to the first heat sink 40. The second heat sink 50 can be connected to the first heat sink 40 by welding, bonding, screwing, snapping or other means. The second heat sink 50 can also simply abut against the first heat sink 40. This arrangement allows the energy on the first heat sink 40 to be conducted to the second heat sink 50.

[0161] The other side of the second heat sink 50 is connected to the housing 10. The second heat sink 50 can be connected to the housing 10 by welding, bonding, screwing, snapping or other means. The second heat sink 50 can also simply abut against the housing 10. This arrangement allows the heat on the second heat sink 50 to be conducted to the housing 10, that is, the heat on the first heat sink 40 can be conducted to the housing 10 through the second heat sink 50, so as to help reduce the situation of heat concentration leading to local overheating.

[0162] When the first heat sink 40 only includes the first heat sink 41, the second heat sink 50 can also abut against the winding unit 31 to conduct heat from the winding unit 31, thereby facilitating a better reduction in the temperature of the winding unit 31.

[0163] When the first heat sink 40 includes a first heat sink 41 and a second heat sink 42, the second heat sink 50 can abut against the side of the second heat sink 42 away from the winding unit 31. In this case, the second heat sink back is indirectly connected to the housing 10 through the second heat sink 50, and the heat on the second heat sink 42 can be conducted to the housing 10 through the second heat sink 50.

[0164] When the first heat sink 40 includes a first heat sink 41, a second heat sink 42 and a third heat sink 43, the third heat sink 43 can pass through the second heat sink 50. In this case, a hole structure can be provided on the second heat sink 50 so that the third heat sink 43 can pass through.

[0165] In this embodiment, a second heat sink 50 is provided around the stator assembly 30, and the heat on the first heat sink 40 is conducted to the housing 10 through the second heat sink 50 to reduce the temperature of the stator assembly 30. At the same time, the second heat sink 50 can also help fix the stator assembly 30 and the first heat sink 40.

[0166] refer to Figure 8 In some embodiments, the second heat sink 50 includes a fourth heat sink 51 disposed around the periphery of the stator assembly 30; the second heat sink 50 also includes a fifth heat sink 52 connected to the fourth heat sink 51, at least a portion of the fifth heat sink 52 passing through the housing 10 and extending outside the housing 10.

[0167] The fourth heat dissipation part 51 refers to a portion of the structure in the second heat dissipation member 50. The fourth heat dissipation part 51 is arranged around the periphery of the stator assembly 30. Therefore, the fourth heat dissipation part 51 can be a circular ring structure, a square ring structure, or other ring structures. The shape of the fourth heat dissipation part 51 can also be set according to the shape of the stator assembly 30. When the first heat dissipation member 40 partially surrounds the stator assembly 30, the fourth heat dissipation part 51 is located on the side of the first heat dissipation member 40 away from the rotation axis 201. That is, the fourth heat dissipation part 51 is located outside the first heat dissipation member 40 and surrounds the first heat dissipation member 40. In this case, the shape of the fourth heat dissipation part 51 can also be set according to the shape of the first heat dissipation member 40. The material of the fourth heat dissipation part 51 can include metal, plastic, or other materials.

[0168] One side of the fourth heat dissipation part 51 is connected to the first heat dissipation element 40, and the other side of the fourth heat dissipation part 51 is connected to the housing 10 to conduct heat from the first heat dissipation element 40 to the housing 10. The fourth heat dissipation part 51 is connected to the first heat dissipation element 40 by welding, bonding, screwing, snapping or other means. The fourth heat dissipation part 51 may also simply abut against the first heat dissipation element 40. The fourth heat dissipation part 51 is also connected to the housing 10 by welding, bonding, screwing, snapping or other means. The fourth heat dissipation part 51 may also simply abut against the housing 10.

[0169] The fourth heat dissipation part 51 can conduct at least a portion of the heat from the first heat dissipation member 40 to the housing 10, and the housing 10 can exchange heat with the outside to dissipate the heat on the housing 10.

[0170] The fifth heat dissipation part 52 refers to a portion of the structure in the second heat dissipation component 50; the shape of the fifth heat dissipation part 52 can be square, circular, prismatic, or other shapes; the fifth heat dissipation part 52 is connected to the fourth heat dissipation part 51, either directly or indirectly through an intermediate structure; the fifth heat dissipation part 52 can be connected to the fourth heat dissipation part 51 by welding, bonding, screwing, snapping, or other methods, and the fifth heat dissipation part 52 can also be integrally formed with the fourth heat dissipation part 51; in a second heat dissipation component 50, the number of fifth heat dissipation parts 52 can be one or more; the material of the fifth heat dissipation part 52 can include metal, plastic, or other materials.

[0171] At least a portion of the fifth heat dissipation part 52 passes through the housing 10 and extends outside the housing 10, meaning that at least a portion of the fifth heat dissipation part 52 can be located outside the housing 10. The portion of the fifth heat dissipation part 52 located outside the housing 10 can exchange heat with the outside to reduce the temperature on the fifth heat dissipation part 52. At the same time, since the fifth heat dissipation part 52 is connected to the fourth heat dissipation part 51, the heat on the fourth heat dissipation part 51 can also be conducted to the fifth heat dissipation part 52 and can be dissipated to the outside through the fifth heat dissipation part 52. That is, the heat on the second heat dissipation part 50 can all be dissipated to the outside through the fifth heat dissipation part 52, thereby better reducing the temperature of the winding unit 31 and reducing the internal temperature of the motor 100.

[0172] It is understandable that the fifth heat dissipation part 52 passes through the housing 10, that is, the housing 10 is provided with a hole structure or groove structure that allows the fifth heat dissipation part 52 to pass through.

[0173] When the second heat sink 50 includes the fifth heat sink 52, the first heat sink 40 may include the third heat sink 43, or it may not include the third heat sink 43.

[0174] This embodiment provides specific structures for the second heat sink 50, including a fourth heat sink 51 to conduct heat from the first heat sink 40 and assist in fixing the stator assembly 30 and the first heat sink 40; a fifth heat sink 52 is provided, with at least a portion of the fifth heat sink 52 passing through the housing 10, so that the fifth heat sink 52 can exchange heat with the space outside the housing 10, which can reduce the temperature of the winding unit 31 and the internal temperature of the entire motor 100, thereby better reducing the damage that high temperature may cause to the winding unit 31.

[0175] In some embodiments, the second heat sink 50 is a heat-conducting structure.

[0176] The second heat sink 50 is a heat-conducting structure, so that the second heat sink 50 can better conduct heat.

[0177] The second heat sink 50 is a thermally conductive structure, meaning that the material of the second heat sink 50 includes thermally conductive materials. The material of the second heat sink 50 can be the same as or different from the material of the first heat sink 41. For example, the material of the second heat sink 50 can include one or more of metal, ceramic, carbon-based materials, or other materials with good thermal conductivity. For instance, the material of the second heat sink 50 can include only metal and form a metal structure, or the material of the second heat sink 50 can include only ceramic and form a ceramic structure.

[0178] For example, the material of the second heat sink 50 may include silver, copper, gold, aluminum, tungsten, aluminum alloy, copper alloy or other metals and alloys.

[0179] For example, the material of the second heat sink 50 may include aluminum nitride, silicon carbide, boron nitride, or other ceramic materials.

[0180] For example, the material of the second heat sink 50 may include graphite, graphene, diamond, carbon fiber or other carbon-based materials.

[0181] For example, while the second heat sink 50 is a heat-conducting structure, it can also be an insulating structure to reduce the risk of short circuit between the winding unit 31 and the second heat sink 50. In this case, the material of the second heat sink 50 can have both heat-conducting and insulating properties. For example, the material of the second heat sink 50 can include one or more of alumina, aluminum nitride, boron nitride, glass fiber, epoxy resin, silicon carbide, or other insulating and heat-conducting materials.

[0182] In this embodiment, the second heat sink 50 is a heat-conducting structure so that the second heat sink 50 can better conduct heat from the first heat sink 40 and better exchange heat with the housing 10, thereby improving the heat dissipation effect of the stator assembly 30.

[0183] In some embodiments, the motor 100 further includes a fixing structure connected to the winding unit 31 and the first heat sink 40 to fix the winding unit 31 and the first heat sink 40; the fixing structure is also connected to the housing 10 to conduct heat from the winding unit 31 and the first heat sink 40 to the housing 10.

[0184] The fixing structure refers to the structure in the motor 100 used to fix the winding unit 31 and the first heat sink 40, so that the first heat sink 40 can better support the corresponding winding unit 31, so that the first heat sink 40 can better exchange heat with the corresponding winding unit 31; the fixing structure can be a frame structure, column structure, plate structure or other shape structure; the fixing structure can be connected to the winding unit 31 and the first heat sink 40 by adhesive, snap-fit ​​or other means; the material of the fixing structure can include metal, plastic or other materials.

[0185] The fixing structure is also connected to the housing 10. Since the fixing structure is used to fix the winding unit 31 and the first heat sink 40, that is, the winding unit 31 and the first heat sink 40 are both connected to the fixing structure. A portion of the heat on the winding unit 31 and the first heat sink 40 can be conducted to the fixing structure. In this arrangement, at least a portion of the heat on the fixing structure can be transferred to the housing 10, and the housing 10 can exchange heat with the outside and dissipate some heat, thereby better cooling the heat on the winding unit 31 and the first heat sink 40 and reducing the overall temperature inside the motor 100.

[0186] For example, if the motor 100 also includes a second heat sink 50, the fixing structure is also connected to the second heat sink 50 to fix the winding unit 31, the first heat sink 40 and the second heat sink 50 into one unit; in this case, the fixing structure can also transfer at least a portion of the heat on the second heat sink 50 to the housing 10.

[0187] In this embodiment, a fixing structure is provided to fix the first heat sink 40 and the winding unit 31. At the same time, the fixing structure is also connected to the housing 10 so that the fixing structure can also conduct some of the heat on the winding unit 31 and the first heat sink 40 to the housing 10, thereby improving the heat dissipation efficiency of the stator assembly 30.

[0188] In some embodiments, the fixing structure is a thermally conductive structure.

[0189] The fixing structure is a heat-conducting structure, so that the fixing structure can better conduct the heat on the winding unit 31 and the first heat sink 40 to the housing 10.

[0190] The fixed structure is a heat-conducting structure, that is, the material of the fixed structure includes heat-conducting materials. The material of the fixed structure can be the same as or different from the material of the first heat dissipation part 41. For example, the material of the fixed structure can include one or more of metal, ceramic, carbon-based materials or other materials with good thermal conductivity. For example, the material of the fixed structure can include only metal and form a metal structural component, or the material of the fixed structure can include only ceramic and form a ceramic structural component.

[0191] For example, the material of the fixed structure may include silver, copper, gold, aluminum, tungsten, aluminum alloy, copper alloy or other metals and alloys.

[0192] For example, the material of the fixed structure may include aluminum nitride, silicon carbide, boron nitride, or other ceramic materials.

[0193] For example, the material of the fixed structure may include graphite, graphene, diamond, carbon fiber, or other carbon-based materials.

[0194] For example, while the fixed structure is a thermally conductive structure, it can also be an insulating structure to reduce the risk of short circuit between the winding unit 31 and the fixed structure. In this case, the material of the fixed structure can have both thermal conductivity and insulation properties. For example, the material of the fixed structure can include one or more of alumina, aluminum nitride, boron nitride, glass fiber, epoxy resin, silicon carbide, or other insulating and thermally conductive materials.

[0195] In this embodiment, the fixing structure is made into a heat-conducting structure so that the fixing structure can better conduct heat on the winding unit 31 and the first heat sink 40, and can better exchange heat with the housing 10, thereby improving the heat dissipation effect of the stator assembly 30.

[0196] In some embodiments, the fixing structure is an injection-molded structure or a potting structure.

[0197] The fixing structure can be an injection-molded structure, meaning it can be formed through an injection molding process. Injection molding refers to the process of injecting molten material into a mold cavity under high pressure and then cooling and solidifying it to form a part of a specific shape. Using an injection-molded structure ensures excellent surface quality and structural consistency, while also providing high strength and rigidity, thus better securing the winding unit 31 and the first heat sink 40.

[0198] Fixed structures can also be potted structures, meaning that fixed structures can be formed through a potting process. The potting process refers to the process of filling electronic components, circuit boards, or device cavities with liquid encapsulation material, which then cures to form a protective layer.

[0199] The fixing structure is a potting structure, which allows it to more comprehensively fix the winding unit 31 and the first heat sink 40 and protect them. This design also increases the contact area between the fixing structure and the winding unit 31 and the first heat sink 40, thereby enabling the fixing structure to conduct heat better. Since there is an irregular gap between the stator assembly 30 and the first heat sink 40, this design also allows the fixing structure to better extend into the irregular gap, thereby better fixing the winding unit 31 and the first heat sink 40.

[0200] This embodiment provides some specific structures for fixing structures, making the fixing structure an injection-molded structure or a potting structure, so that the fixing structure can have high integrity, high strength, rigidity and protective performance.

[0201] refer to Figures 3 to 7 In some embodiments, the winding unit 31 includes a magnetic core 311 and a coil 312 disposed around the magnetic core 311, the coil 312 being arranged in a direction parallel to the axis of rotation 201; at least a portion of the first heat sink 40 abuts against an adjacent coil 312.

[0202] The magnetic core 311 refers to the magnetically conductive structure in the winding unit 31, that is, the structure used to provide a magnetic field path. In this case, the magnetic core 311 can be a magnetically conductive structure, and the magnetism is also used to provide a fixed foundation for the coil 312. The shape of the magnetic core 311 can be prism, cylinder or other shapes. The material of the magnetic core 311 can include silicon steel, ferrite, soft magnetic composite materials, etc.

[0203] Coil 312 refers to the structure in winding unit 31 used to conduct electricity and form a magnetic field. Coil 312 is wound on magnetic core 311 and can form a magnetic field after being energized. The magnetic field formed by coil 312 can interact with the magnetic field formed by rotor assembly 20 to realize the conversion between electrical energy and mechanical energy in motor 100. Coil 312 can be round wire, flat wire or other shapes, and coil 312 can be copper wire, aluminum wire or other conductor wire.

[0204] The coil 312 is arranged around the magnetic core 311, that is, the coil 312 is wound around the magnetic core 311 along the circumference of the magnetic core 311; the winding direction of the coil 312 is parallel to the rotation axis 201, that is, the axis around which the coil 312 is wound is parallel to the rotation axis 201, so that the force generated by the magnetic field of the coil 312 can drive the rotor assembly 20 to rotate along the rotation axis 201.

[0205] At least a portion of the first heat sink 40 abuts against the adjacent coil 312. That is, only a portion of the first heat sink 40 can abut against the adjacent coil 312, or the entire first heat sink 40 can abut against the adjacent coil 312. Since the coil 312 is one of the main heat-generating structures in the winding unit 31, having at least a portion of the first heat sink 40 abut against the adjacent coil 312 allows the first heat sink 40 to better conduct heat from the coil 312, thereby enabling the first heat sink 40 to better reduce the temperature of the coil 312 and, consequently, the temperature of the winding unit 31.

[0206] This embodiment provides a specific structure for some winding units 31, and at least a portion of the first heat sink 40 abuts against the coil 312 to conduct heat generated on the coil 312 through the first heat sink 40.

[0207] refer to Figures 3 to 7 In some embodiments, at least two winding units 31 form an inner space 301 around a rotation axis 201; the coil 312 includes an output end and an input end, both of which extend into the inner space 301.

[0208] The inner space 301 refers to the spatial structure enclosed by each winding unit 31. Since each winding unit 31 is arranged around the rotation axis 201, the rotation axis 201 passes through the inner space 301. Depending on the arrangement of each winding unit 31, the inner space 301 can be a cylindrical space, a prism-shaped space, or a spatial structure of other shapes.

[0209] When the second heat dissipation part 42 of the first heat dissipation member 40 is provided on the side of the winding unit 31 away from the rotation axis 201, the second heat dissipation part 42 is provided on the side of the winding unit 31 away from the inner space 301.

[0210] The input terminal refers to one end of the coil 312, from which current can enter the coil 312. The output terminal refers to the other end of the coil 312, from which current can flow out of the coil 312. Both the input and output terminals extend into the inner space 301, meaning that both the input and output terminals are connected to other electrical structures within the inner space 301. In this case, the side of the winding unit 31 facing away from the inner space 301 can have a larger area to facilitate contact with the first heat sink 40 or the housing 10, thereby increasing the heat dissipation area of ​​the winding unit 31 and improving its heat dissipation efficiency.

[0211] When the second heat dissipation part 42 of the first heat dissipation member 40 is located on the side of the winding unit 31 away from the rotation axis 201, this arrangement can reduce the space occupied by the input end and the output end on the outer side of the stator assembly 30. The second heat dissipation part 42 also does not need to be arranged to avoid the input end and the output end, which increases the contact area between the second heat dissipation part 42 and the corresponding winding unit 31 and improves the heat dissipation efficiency of the winding unit 31.

[0212] This embodiment further provides a structure for some winding units 31, such that the input and output ends of the coil 312 are both located in the inner space 301 of the stator assembly 30, so that the first heat sink 40 does not need to avoid the cable on the outer ring of the stator assembly 30, thereby increasing the contact area between the first heat sink 40 and the winding unit 31 and improving the heat dissipation effect of the stator assembly 30.

[0213] refer to Figure 4 , Figure 6 In some embodiments, the size of the coil 312 is smaller than the size of the magnetic core 311 in a direction parallel to the rotation axis 201; a portion of the first heat sink 40 abuts against the magnetic core 311.

[0214] The size of the coil 312 in the direction parallel to the rotation axis 201 is smaller than the size of the magnetic core 311. That is, the coil 312 only covers a part of the magnetic core 311, and a part of the magnetic core 311 around the coil 312 can be exposed to the outside.

[0215] A portion of the first heat sink 40 rests against the magnetic core 311. Since the portion of the magnetic core 311 surrounding the coil 312 is exposed to the outside, the first heat sink 40 can rest against the exposed portion of the magnetic core 311 to conduct heat on the magnetic core 311 and reduce the temperature of the magnetic core 311, thereby better reducing the temperature of the winding unit 31.

[0216] Because the magnetic core 311 is prone to heat generation due to turbine loss, hysteresis loss and other reasons during the operation of the motor 100, a part of the first heat sink 40 is placed against the magnetic core 311 so as to directly conduct the heat on the magnet through the first heat sink 40 to reduce the temperature of the magnetic core 311.

[0217] This embodiment further provides a structure for some winding units 31, such that a portion of the first heat sink 40 abuts against the magnetic core 311, so that the heat on the magnetic core 311 can be conducted through the first heat sink 40, thereby further reducing the overall temperature of the winding unit 31 and improving the heat dissipation effect of the winding unit 31.

[0218] refer to Figure 1 , Figure 2 In some embodiments, the stator assembly 30 is disposed on one side of the rotor assembly 20 along the rotation axis 201.

[0219] The stator assembly 30 is disposed on one side of the rotor assembly 20 along the rotation axis 201, that is, the rotor assembly 20 does not pass through the stator assembly 30, and the rotor assembly 20 and the stator assembly 30 are arranged sequentially along the rotation axis 201; in this case, the motor 100 can be an axial motor 100. In this arrangement, the number of stator assemblies 30 can be one, or two or more; the number of rotor assemblies 20 can be one, or two or more.

[0220] Example, reference Figure 1 The number of stator assemblies 30 is one, and the number of rotor assemblies 20 is two, with the two rotor assemblies 20 respectively located on both sides of the stator assembly 30 along the rotation axis 201.

[0221] Example, reference Figure 2 There is one rotor assembly 20 and two stator assemblies 30, with the two stator assemblies 30 respectively located on both sides of the rotor assembly 20 along the rotation axis 201.

[0222] This embodiment provides some arrangement relationships of stator assembly 30 and rotor assembly 20, so that stator assembly 30 and rotor assembly 20 are arranged along rotation axis 201, so that motor 100 is axial motor 100, thereby enabling motor 100 to have a smaller volume and greater torque.

[0223] In some embodiments, the motor 100 includes a housing 10, a rotor assembly 20, a stator assembly 30, a first heat sink 40, and a motor shaft 60.

[0224] Both the rotor assembly 20 and the stator assembly 30 are housed within the housing 10, and at least a portion of the first heat sink 40 and the motor shaft 60 are housed within the housing 10.

[0225] The rotor assembly 20 and the stator assembly 30 are arranged along the rotation axis 201, and the rotor assembly 20 rotates around the rotation axis 201; the rotor assembly 20 is connected to the motor shaft 60 so as to drive the motor 100 to rotate along the rotation axis 201.

[0226] The stator assembly 30 includes a plurality of winding units 31 arranged around the rotation axis 201; the winding unit 31 includes a magnetic core 311 and a coil 312 wound around the magnetic core 311.

[0227] The first heat sink 40 includes a first heat sink 41, which is located between two adjacent winding units 31. Part of the first heat sink 41 abuts against two adjacent coils 312, and another part of the first heat sink 41 abuts against two adjacent magnetic cores 311.

[0228] The first heat sink 40 also includes a second heat sink 42 connected to the first heat sink 41. The side of the second heat sink 42 facing the winding unit 31 abuts against the side of the winding unit 31 opposite to the rotation axis 201, and the side of the second heat sink 42 opposite to the winding unit 31 abuts against the housing 10.

[0229] The first heat sink 40 also includes a third heat sink 43 connected to the second heat sink 42, the third heat sink 43 passing through the housing 10 and extending outside the housing 10.

[0230] Secondly, some embodiments of this application also provide a powertrain including the motor 100 provided in some embodiments of the first aspect.

[0231] In this powertrain, the stator assembly 30 in the motor 100 has good heat dissipation performance, the temperature of the stator assembly 30 is relatively stable, and the power output of the motor 100 is also relatively stable; at the same time, the safety performance of the motor 100 is also good.

[0232] Thirdly, some embodiments of this application also provide an electric device, including the motor 100 provided in some embodiments of the first aspect; or the power assembly provided in some embodiments of the second aspect.

[0233] In this electric device, the stator assembly 30 in the motor 100 has good heat dissipation performance, the temperature of the stator assembly 30 is relatively stable, and the power output of the motor 100 is also relatively stable; at the same time, the safety performance of the motor 100 is also good.

[0234] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electric machine characterized in that, include: case; A rotor assembly is disposed within the housing, and the rotor assembly is rotatable along a rotation axis; A stator assembly, disposed within the housing, the stator assembly comprising at least two winding units arranged around the axis of rotation; A first heat sink is disposed within the housing, and at least a portion of the first heat sink extends between two adjacent winding units to conduct heat between the two winding units. The first heat sink includes a first heat sink portion, which is located between two adjacent winding units and abuts against the adjacent winding units to exchange heat with them. The first heat dissipation unit is also connected to the housing to conduct heat from the winding unit to the housing.

2. The electric machine of claim 1, wherein, The first heat dissipation part is a heat-conducting structure.

3. The electric machine of claim 1, wherein, The first heat sink further includes a second heat sink connected to the first heat sink, the second heat sink abutting against the side of the winding unit opposite to the rotation axis, and the second heat sink connected to the housing.

4. The electric machine of claim 3, wherein, The second heat dissipation part is a heat-conducting structure.

5. The electric machine of any of claims 1-4, wherein, The first heat sink further includes a third heat sink connected to the first heat sink, the third heat sink protruding from the first heat sink in a direction away from the rotation axis.

6. The electric machine of claim 5, wherein, At least a portion of the third heat dissipation unit passes through the housing and extends outside the housing.

7. The electric machine of claim 6, wherein, The third heat dissipation part is a heat-conducting structure.

8. The electric machine of any one of claims 1-4, wherein, The number of the first heat sink is one, and the first heat sink includes at least two first heat sink sections.

9. The electric machine of claim 3 or 4, wherein, The number of the first heat sink is at least two, and the first heat sink includes a second heat sink and at least one first heat sink; The second heat dissipation portions of two adjacent first heat dissipation components are spaced apart.

10. The electric machine of any one of claims 1-4, wherein, The motor further includes a second heat sink, at least a portion of which is housed within the housing, and the second heat sink is disposed around the rotation axis on the periphery of the stator assembly. One side of the second heat sink is connected to the first heat sink, and the other side of the second heat sink is connected to the housing, so as to conduct the heat of the first heat sink to the housing.

11. The electric machine of claim 10, wherein, The second heat sink includes a fourth heat sink portion, which is disposed around the periphery of the stator assembly; The second heat sink further includes a fifth heat sink connected to the fourth heat sink, at least a portion of which passes through the housing and extends outside the housing.

12. The electric machine of claim 10, wherein, The second heat sink is a heat-conducting structure.

13. The electric machine of any one of claims 1-4, wherein, The motor further includes a fixing structure, which is connected to the winding unit and the first heat sink to fix the winding unit and the first heat sink. The fixing structure is also connected to the housing to conduct heat from the winding unit and the first heat sink to the housing.

14. The electric machine of claim 13, wherein, The fixed structure is a heat-conducting structure.

15. The electric machine of claim 13, wherein, The fixing structure is an injection-molded structure or a potting structure.

16. The electric machine of any one of claims 1-4, wherein, The winding unit includes a magnetic core and a coil arranged around the magnetic core, the coil being arranged in a direction parallel to the axis of rotation; At least a portion of the first heat sink abuts against the adjacent coil.

17. The electric machine of claim 16, wherein, At least two of the winding units form an inner space around the axis of rotation; The coil includes an output end and an input end, both of which extend into the inner space.

18. The electric machine of claim 16, wherein, In a direction parallel to the rotation axis, the coil has a size smaller than that of the magnetic core; a portion of the first heat sink abuts the magnetic core.

19. The electric machine of any one of claims 1-4, wherein, The stator assembly is disposed on one side of the rotor assembly along the rotation axis.

20. A powertrain, characterized by, An electric machine comprising any one of claims 1-19.

21. An electrically powered device, characterized by An electric machine comprising any one of claims 1-19; or a powertrain as claimed in claim 20.

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