Motor and vehicle with same

Abstract

The embodiment of the utility model discloses a motor and a vehicle with the same, the motor comprises a stator assembly, the stator assembly comprises a stator core and a stator winding, the stator core comprises a yoke part and a tooth part located at one side, facing the axis of the motor, of the yoke part, the yoke part and the tooth part define a winding groove, and the stator winding is arranged in the winding groove; wherein the stator winding comprises a winding wire wound in a winding groove, and the cross section contour of the winding wire is square. According to the motor provided by the embodiment of the invention, by adopting the square winding, the slot fullness rate can be improved, the torque density and the power density of the motor are higher, the energy efficiency of the motor is improved, the size of the motor can be reduced, the space occupation of the motor is reduced, and the arrangement difficulty of the motor is reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to an electric motor and a vehicle having the same. Background Technology

[0002] In related technologies, vehicles can be equipped with multiple motors, such as starter motors, generators, drive motors, and actuator motors. However, existing motors have low torque and power density, large size, and are difficult to arrange. In some application scenarios, they are also difficult to meet the usage requirements. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a motor and vehicle with higher torque density and power density, smaller size, and easier installation.

[0004] In a first aspect, embodiments of this application provide an electric motor, including: a stator assembly, the stator assembly including: a stator core and a stator winding, the stator core including: a yoke and a toothed portion located on the side of the yoke facing the motor axis, the yoke and the toothed portion defining a winding slot, the stator winding being disposed in the winding slot; wherein the stator winding includes a winding wire wound in the winding slot, the cross-sectional profile of the winding wire being square.

[0005] According to the embodiments of this application, by using square windings, the slot fill factor can be increased, and the torque density and power density of the motor can be higher, thereby improving the motor's energy efficiency. It can also reduce the motor's size and space occupation, thereby reducing the difficulty of motor layout.

[0006] According to some embodiments of this application, adjacent teeth are parallel to each other's sides so that the winding slot is constructed as a rectangular slot.

[0007] In the above technical solution, the rectangular slots combined with square windings can improve space utilization, allowing the windings to be tightly filled in the winding slots, thereby increasing the slot fill factor and increasing the total amount of conductors in the winding slots. This, in turn, improves the output power, energy density, and efficiency of the motor. At the same time, it can make the windings more neatly arranged, which is also conducive to the uniform distribution of heat, improves heat concentration, and can improve heat dissipation efficiency.

[0008] More importantly, it can reduce the flow path of eddy currents in the stator core, reduce eddy current losses, and improve the overall efficiency of the motor. At the same time, it can make the magnetic field distribution in the winding slots more uniform, improve the uniformity of magnetic flux density, optimize the electromagnetic performance of the motor, and improve efficiency and stability.

[0009] Specifically, the rectangular slot includes a flat slot bottom away from the motor axis and two parallel side surfaces on both sides of the slot body, which allows the winding to be tightly fitted in the winding slot to reduce gaps and further improve the slot fill factor. At the same time, since the winding slot is constructed as a rectangular slot, it can also improve the structural strength of the stator core, realize reliable positioning of the stator winding, reduce the probability of the stator winding becoming loose or shifting, and also improve the reliability and stability of the stator assembly.

[0010] According to some embodiments of this application, at least one of the sides of adjacent teeth facing each other is configured as a stepped surface, so that the winding slot is configured as a stepped slot.

[0011] In the above technical solution, by setting the stepped slot, the stability of the stator winding can be improved while achieving the same technical effect as the rectangular slot, and the stability and reliability of the motor can also be improved.

[0012] According to some embodiments of this application, the distance between adjacent steps on the stepped surface is L1, the size of the winding is L2, and L1 = NL2, where N is a positive integer.

[0013] According to some embodiments of this application, the teeth are detachably disposed on the yoke, and the teeth are made of a first material and the yoke is made of a second material, wherein the magnetic permeability of the first material is higher than that of the second material.

[0014] In the above technical solution, the tooth structure is made of the first material and the yoke structure is made of the second material. On the one hand, the tooth has higher magnetic permeability, which can improve the magnetic field strength and efficiency, while the yoke has higher structural strength, which can improve the structural strength and stability of the stator assembly, and increase the durability and reliability of the motor, especially the reliability and safety under high load and vibration environments. On the other hand, it can reduce the production cost of the stator core.

[0015] According to some embodiments of this application, the first material is an amorphous alloy and the second material is silicon steel.

[0016] In the above technical solution, the tooth part is made of amorphous alloy, which has extremely high magnetic permeability and can reduce hysteresis loss and eddy current loss. It also has better thermal stability and corrosion resistance. The yoke part is made of silicon steel, which makes the yoke part also have high magnetic permeability, while reducing the cost of the stator core and ensuring that the overall structural strength of the stator core meets the usage requirements.

[0017] According to some embodiments of this application, a first connecting portion is provided on the yoke, and a second connecting portion connected to the first connecting portion is provided on the tooth portion.

[0018] In the above technical solution, the detachable connection between the yoke and the teeth is achieved through the first connecting part and the second connecting part, which can reduce the difficulty of disassembling the teeth and the yoke, facilitate the assembly and disassembly of the teeth and the yoke, and reduce the maintenance cost in the later stage.

[0019] According to some embodiments of this application, the first connecting part is constructed as a first connecting groove, and the second connecting part is constructed as a first connecting protrusion, wherein the first connecting protrusion is inserted into the first connecting groove.

[0020] In the above technical solution, the first connecting part and the second connecting part can be assembled by plugging and mating, which makes the assembly easier and more efficient.

[0021] According to some embodiments of this application, the cross-sectional profile of the first connecting protrusion is trapezoidal, and the width of the first connecting protrusion gradually increases in the direction away from the tooth.

[0022] In the above technical solution, by constructing the first connecting protrusion as a trapezoid and gradually increasing the width of the first connecting protrusion away from the tooth, on the one hand, the contact area between the tooth and the yoke can be increased to improve the reliability and stability of the connection between the tooth and the yoke. On the other hand, in the radial direction, the first connecting protrusion can achieve interference fit limiting, reduce the probability of radial separation between the yoke and the tooth, and further improve the connection strength.

[0023] According to some embodiments of this application, a limiting part extending radially along the motor is further provided on the first connecting protrusion, and a limiting groove cooperating with the limiting part is provided in the first connecting groove.

[0024] In the above technical solution, the contact area between the teeth and the yoke can be further increased by the cooperation of the limiting part and the limiting groove, and the radial connection strength between the teeth and the yoke can be higher, resulting in higher structural strength and stability of the stator core.

[0025] According to some embodiments of this application, the motor further includes: a rotor assembly disposed within a stator assembly, and a plurality of magnetic poles are formed on the rotor core, each magnetic pole being defined by a plurality of magnets, and a magnet slot is formed on the rotor core for accommodating the magnets, wherein the shape of the magnet slot defining the same magnetic pole is any one of V-shape, U-shape, or W-shape.

[0026] Secondly, this application proposes a vehicle including: the motor in the above embodiments, wherein the motor is configured as a steering actuator motor.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 This is a schematic diagram of a motor according to an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of a stator assembly according to an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the yoke according to an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the teeth according to an embodiment of this application;

[0033] Figure 5 This is a schematic diagram of a stator winding according to an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of a rotor assembly according to an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of another rotor assembly according to an embodiment of this application.

[0036] Figure label:

[0037] Motor 100,

[0038] Stator assembly 10, stator core 11, yoke 111, first connecting part 1111, limiting groove 1112, tooth part 112, second connecting part 1121, limiting part 1122, winding groove 113, stator winding 12, winding 121.

[0039] Rotor assembly 20, rotor core 21, magnet slot 211. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0042] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0045] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0047] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0048] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0049] In this application, "multiple" means two or more (including two).

[0050] In the existing technology, vehicles can be equipped with various motors, such as starter motors, generators, drive motors, and actuator motors. However, due to the energy efficiency requirements of vehicles, the torque density and power density of existing motors are low and cannot meet the usage needs. Furthermore, due to the space requirements of vehicles, existing motors are large in size, occupy a lot of space, and are difficult to install.

[0051] Based on this, this application proposes a motor with higher torque density and power density to meet usage requirements, and smaller size to meet space requirements and reduce layout difficulty.

[0052] The following is for reference. Figures 1-7 This invention describes a motor 100 and a vehicle according to an embodiment of the present invention.

[0053] like Figure 1 As shown, this application embodiment provides an electric motor 100, which includes a stator assembly 10 and a rotor assembly 20.

[0054] The stator assembly 10 includes a stator core 11 and a stator winding 12. The stator core 11 is usually formed by stacking multiple layers of stator laminations and can be a cylindrical structure. The stator winding 12 is a coil made by winding wire and placed in the winding slot 113 of the stator core 11. The configuration and connection method of the stator winding 12 can determine the working characteristics of the motor 100. The motor 100 can be an AC motor 100, in which case the stator winding 12 is a concentrated winding or a distributed winding. The motor 100 can also be a DC motor 100, in which case the stator winding 12 can be an excitation winding.

[0055] Among them, combined Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, the stator assembly 10 may include a stator core 11 and a stator winding 12. The stator core 11 includes a yoke 111 and a tooth 112 located on the side of the yoke 111 facing the axis of the motor 100. The yoke 111 and the tooth 112 define a winding slot 113. The stator winding 12 is disposed in the winding slot 113.

[0056] Furthermore, the stator winding 12 includes a winding 121 wound in the winding slot 113, and the cross-sectional profile of the winding 121 is square.

[0057] In other words, in this embodiment of the application, the winding 121 is a square wire with a square cross-sectional profile. The square wire allows the adjacent wires to be in surface contact during the winding process of the winding 121 being wound in the winding slot 113 and forming the stator winding 12. More windings 121 can be wound in the winding slot 113 of the same volume.

[0058] This can improve the slot fill factor of the winding slot 113. Because the winding 121 is constructed as a square wire, it can fit more closely to the inner wall of the winding slot 113, and the gap between adjacent windings 121 can be smaller. Therefore, the space of the winding slot 113 can be utilized more effectively, thereby improving the slot fill factor. This means that under the same volume, more conductor material can be placed using the winding 121 of this application embodiment, thereby improving the overall performance of the motor 100.

[0059] Meanwhile, by setting a square wire body, resistance loss can also be reduced. Due to its larger surface area to volume ratio, the square wire body has better heat dissipation than the prior art. Better thermal management helps to reduce the increase in resistance caused by temperature rise, thereby reducing energy loss in the power conversion process. It can also enhance mechanical strength. Compared with the circular wire of the prior art, the winding 121 of this application embodiment is more robust and stable when subjected to radial force, which is beneficial to improving the reliability and durability of the motor 100 during operation.

[0060] Furthermore, the use of the winding 121 of this application can also optimize electromagnetic performance. By adjusting the arrangement of the winding 121, the magnetic field distribution of the stator assembly 10 can be effectively controlled, further optimizing the electromagnetic characteristics of the motor 100, such as reducing eddy current losses and improving torque ripple.

[0061] According to the embodiments of this application, the motor 100, by adopting a square winding 121, can improve the slot fill factor and make the torque density and power density of the motor 100 higher, thereby improving the energy efficiency of the motor 100. It can also reduce the volume of the motor 100, reduce the space occupied by the motor 100, and reduce the difficulty of arranging the motor 100.

[0062] Understandably, by using square windings, the fill factor of winding slot 113 can be increased from 40% in the prior art to over 80%.

[0063] The winding 121 can be made of round conductors and further die-cast into square conductors, and then covered with an insulation layer on the outside to isolate the stator winding 12 and the stator core 11, preventing short circuits and leakage. Common insulation layers can be insulating paper, insulating varnish, and insulating resin.

[0064] The stator winding 12 can be secured by end binding to prevent it from loosening during operation. Typically, the stator winding 12 is bound at both ends. The binding material can be nylon rope, fiberglass tape, or other high-strength materials.

[0065] An outer casing (i.e., motor housing) can be provided on the outside of the stator assembly 10 to protect the stator assembly 10 from the influence of the external environment and provide mechanical support. The casing is usually made of cast iron or steel plate, which has good mechanical strength and corrosion resistance. A junction box can be installed on the casing to connect the power supply and control circuit. The junction box is usually installed on one side of the casing. The junction box contains wiring terminals, wiring boards and other electrical connectors. Sensors and controllers can also be installed on the casing.

[0066] Combination Figure 1 and Figure 2 As shown, according to some embodiments of this application, adjacent teeth 112 are parallel to each other's sides so that the winding slot 113 is constructed as a rectangular slot.

[0067] The rectangular slots combined with the square winding 121 can improve space utilization, allowing the winding 121 to be tightly filled in the winding slot 113, thereby increasing the slot fill factor and increasing the total amount of conductors in the winding slot 113. This, in turn, improves the output power, energy density, and efficiency of the motor 100. At the same time, it can make the arrangement of the winding 121 more orderly, which is also conducive to the uniform distribution of heat, improves heat concentration, and can improve heat dissipation efficiency.

[0068] More importantly, it can reduce the flow path of eddy currents in the stator core 11, reduce eddy current losses, improve the overall efficiency of the motor 100, and at the same time make the magnetic field distribution in the winding slot 113 more uniform, improve the uniformity of magnetic flux density, optimize the electromagnetic performance of the motor 100, and improve efficiency and stability.

[0069] Specifically, the rectangular slot includes a flat slot bottom away from the axis of the motor 100 and two parallel side surfaces on both sides of the slot body, so that the winding 121 can be tightly fitted in the winding slot 113 to reduce gaps and further improve the slot fill factor. At the same time, since the winding slot 113 is constructed as a rectangular slot, it can also improve the structural strength of the stator core 11, realize reliable limiting of the stator winding 12, reduce the probability of the stator winding 12 loosening or shifting, and also improve the reliability and stability of the stator assembly 10.

[0070] Of course, the winding slot 113 structure of this application embodiment is not limited to this. In other embodiments, at least one of the sides of adjacent teeth 112 facing each other is constructed as a stepped surface so that the winding slot 113 is constructed as a stepped slot.

[0071] In this way, by setting the stepped slot, the stability of the stator winding 12 can be improved while achieving the same technical effect as the rectangular slot mentioned above, and the stability and reliability of the motor 100 can also be improved.

[0072] It is understandable that the distance between adjacent steps on the stepped surface is L1, the size of the winding 121 is L2, and L1 = NL2, where N is a positive integer.

[0073] For example, in an embodiment where both sides are stepped surfaces, N=1, and the winding 121 is arranged in five layers, the first layer has 4 windings 121, the second layer has 6 windings 121, the third layer has 8 windings 121, the fourth layer has 10 windings 121, and the fifth layer has 12 windings 121. In an embodiment where only one side is stepped surface, N=1, and the winding 121 is arranged in five layers, the first layer has 4 windings 121, the second layer has 5 windings 121, the third layer has 6 windings 121, the fourth layer has 7 windings 121, and the fifth layer has 8 windings 121.

[0074] In other words, the winding 121 can be arranged in multiple layers along the radial direction of the motor 100, and the number of windings 121 between two adjacent layers of windings 121 can be increased or decreased sequentially in the direction toward the axis of the motor 100.

[0075] Combination Figure 2 , Figure 3 as well as Figure 4As shown, according to some embodiments of this application, the tooth 112 is detachably disposed on the yoke 111, and the tooth 112 is a first material component, the yoke 111 is a second material component, and the magnetic permeability of the first material is higher than that of the second material.

[0076] Specifically, the first material can be silicon steel, soft magnetic composite material, amorphous alloy, etc., and the second material can be low carbon steel, silicon steel, stainless steel, cast iron, etc. The tooth part 112 and the yoke part 111 are made of different materials, and the magnetic permeability of the first material is higher than that of the second material.

[0077] In this way, the tooth 112 is constructed as a first material component and the yoke 111 is constructed as a second material component. On the one hand, the tooth 112 has higher magnetic permeability, which can improve the magnetic field strength and efficiency, while the yoke 111 has higher structural strength, which can improve the structural strength and stability of the stator assembly 10, and increase the durability and reliability of the motor 100, especially the reliability and safety under high load and vibration environments. On the other hand, it can reduce the production cost of the stator core 11.

[0078] According to some embodiments of this application, the first material is an amorphous alloy and the second material is silicon steel.

[0079] Specifically, the tooth 112 is made of amorphous alloy, which has extremely high magnetic permeability and can reduce hysteresis loss and eddy current loss, and has better thermal stability and corrosion resistance. The yoke 111 is made of silicon steel, which makes the yoke 111 also have high magnetic permeability, while reducing the cost of the stator core 11 and ensuring that the overall structural strength of the stator core 11 meets the usage requirements.

[0080] It should be noted that, compared with the prior art, the iron loss of the rotor core 21 in this application embodiment can be reduced by 85% to 95%.

[0081] Combination Figure 3 and Figure 4 As shown, according to some embodiments of this application, the yoke 111 is provided with a first connecting portion 1111, and the tooth 112 is provided with a second connecting portion 1121 connected to the first connecting portion 1111.

[0082] Thus, the detachable connection between the yoke 111 and the tooth 112 is achieved through the first connecting part 1111 and the second connecting part 1121, which can reduce the difficulty of disassembling the tooth 112 and the yoke 111, facilitate the assembly and disassembly of the tooth 112 and the yoke 111, and reduce the maintenance cost in the later stage.

[0083] According to some embodiments of this application, the first connecting portion 1111 is configured as a first connecting groove, and the second connecting portion 1121 is configured as a first connecting protrusion, wherein the first connecting protrusion is inserted into the first connecting groove.

[0084] In other words, in some embodiments, the first connecting part 1111 and the second connecting part 1121 can be assembled by plugging and connecting, which makes the assembly easier and more efficient.

[0085] According to some embodiments of this application, the cross-sectional profile of the first connecting protrusion is trapezoidal, and the width of the first connecting protrusion gradually increases in the direction away from the tooth 112.

[0086] In this way, by constructing the first connecting protrusion as a trapezoid and gradually increasing the width of the first connecting protrusion away from the tooth 112, on the one hand, the contact area between the tooth 112 and the yoke 111 can be increased to improve the reliability and stability of the connection between the tooth 112 and the yoke 111. On the other hand, in the radial direction, the first connecting protrusion can achieve interference fit limiting, reducing the probability of radial separation between the yoke 111 and the tooth 112, and can also further improve the connection strength.

[0087] Combination Figure 2 , Figure 3 as well as Figure 4 As shown, according to some embodiments of this application, a limiting part 1122 extending radially along the motor 100 is further provided on the first connecting protrusion, and a limiting groove 1112 cooperating with the limiting part 1122 is provided in the first connecting groove.

[0088] Therefore, by cooperating with the limiting part 1122 and the limiting groove 1112, the contact area between the tooth part 112 and the yoke part 111 can be further increased, and the radial connection strength between the tooth part 112 and the yoke part 111 can be higher, resulting in higher structural strength and stability of the stator core 11.

[0089] Combination Figure 1 , Figure 6 and Figure 7 As shown, according to some embodiments of this application, the motor 100 further includes: a rotor assembly 20, which is disposed within the stator assembly 10, and a plurality of magnetic poles are formed on the rotor core 21, each magnetic pole being defined by a plurality of magnets, and a magnet slot 211 is formed on the rotor core 21 for accommodating the magnets, wherein the shape of the magnet slot 211 defining the same magnetic pole is any one of V-shape, U-shape, or W-shape.

[0090] Specifically, the rotor core 21 is made of multiple layers of steel sheets stacked together to form a cylindrical structure. The rotor core 21 is usually provided with magnet slots 211 for placing magnets. The rotor core 21 is usually made of high-strength steel to transmit torque and support the entire rotor assembly 20. The rotor assembly 20 is provided with a medium-thick layer between the two ends of the motor 100 shaft and the housing to ensure smooth rotation.

[0091] Among them, the magnetic steel groove 211 is constructed in any of the following shapes: V-shaped, U-shaped, and W-shaped. This can increase the magnetic flux and salient pole ratio, thereby optimizing the magnetic field, increasing the maximum power and maximum torque of the motor 100, and making the power density of the motor 100 higher.

[0092] This application also proposes a vehicle including: the motor 100 in the above embodiments, wherein the motor 100 is configured as a steering actuator motor 100.

[0093] Therefore, the steering actuator motor 100 uses square windings 121 to form the stator winding 12, and the winding slots 113 are formed as rectangular slots or stepped slots. The magnet slots 211 can be V-shaped, U-shaped or W-shaped, and the yoke 111 is made of silicon steel and the teeth 112 are made of amorphous alloy. This can improve the slot fill factor and reduce the size of the motor 100. At the same time, it can optimize the magnetic field, improve the maximum power and maximum torque of the motor 100, and reduce iron loss and improve the energy efficiency of the motor 100.

[0094] In summary, by improving the structure of the stator winding 12 and the stator core 11, the size and weight of the motor 100 can be significantly reduced (by 20%) under the same torque requirements, and energy efficiency can be significantly improved (by no less than 10%).

[0095] The motor 100 and other components and operations of the vehicle according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0096] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0097] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric motor (100), characterized in that, include: A stator assembly (10) includes a stator core (11) and a stator winding (12). The stator core (11) includes a yoke (111) and a tooth (112) located on the side of the yoke (111) facing the axis of the motor (100). The yoke (111) and the tooth (112) define a winding slot (113). The stator winding (12) is disposed in the winding slot (113). The stator winding (12) includes a winding (121) wound in the winding slot (113), the cross-sectional profile of the winding (121) being square.

2. The motor (100) according to claim 1, characterized in that, The adjacent teeth (112) are parallel to each other on their sides so that the winding slot (113) is constructed as a rectangular slot.

3. The motor (100) according to claim 1, characterized in that, At least one of the sides of adjacent teeth (112) facing each other is configured as a stepped surface, so that the winding slot (113) is configured as a stepped slot.

4. The motor (100) according to claim 3, characterized in that, The distance between adjacent steps on the stepped surface is L1, the size of the winding (121) is L2, and L1 = NL2, where N is a positive integer.

5. The motor (100) according to any one of claims 1-4, characterized in that, The tooth (112) is detachably disposed on the yoke (111), and the tooth (112) is made of a first material and the yoke (111) is made of a second material, wherein the magnetic permeability of the first material is higher than that of the second material.

6. The motor (100) according to claim 5, characterized in that, The first material is an amorphous alloy, and the second material is silicon steel.

7. The motor (100) according to claim 5, characterized in that, The yoke is provided with a first connecting part (1111), and the toothed part (112) is provided with a second connecting part (1121) connected to the first connecting part (1111).

8. The motor (100) according to claim 7, characterized in that, The first connecting part (1111) is configured as a first connecting groove, and the second connecting part (1121) is configured as a first connecting protrusion, and the first connecting protrusion is inserted into the first connecting groove.

9. The motor (100) according to claim 8, characterized in that, The cross-sectional profile of the first connecting protrusion is trapezoidal, and the width of the first connecting protrusion gradually increases in the direction away from the tooth (112).

10. The motor (100) according to claim 8, characterized in that, The first connecting protrusion is also provided with a limiting part (1122) extending radially along the motor (100), and the first connecting groove is provided with a limiting groove (1112) that cooperates with the limiting part (1122).

11. The motor (100) according to claim 1, characterized in that, The motor (100) further includes a rotor assembly (20), which is disposed within the stator assembly (10), and a plurality of magnetic poles are formed on the rotor core (21), each magnetic pole being defined by a plurality of magnets. A magnet slot (211) is formed on the rotor core (21) for accommodating the magnets, and the shape of the magnet slot (211) defining the same magnetic pole is any one of V-shape, U-shape, or W-shape.

12. A vehicle, characterized in that, include: The motor (100) according to any one of claims 1-11, wherein the motor (100) is configured as a steering actuator motor.

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