Stator assembly, axial flux electric machine and vehicle

Abstract

The application relates to a stator assembly, an axial flux motor and a vehicle. The stator assembly comprises a first stator and a second stator. The first stator is used to generate a first magnetic field. The second stator is arranged along the axial direction of the stator assembly in sequence with the first stator. The second stator is used to generate a second magnetic field. The second magnetic field is arranged in a different manner from the first magnetic field. At least one of the first stator and the second stator is selectively used to be electrically connected with a power supply, so that the motor with the stator assembly can output various torques, and the motor is suitable for various working conditions. In addition, by arranging the first stator and the second stator, even if one of the first stator and the second stator fails or is invalid, the other stator can still work normally to provide the necessary magnetic field and torque for the corresponding rotor, which greatly improves the reliability, stability and fault tolerance of the motor.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a stator assembly, an axial flux motor, and a vehicle. Background Technology

[0002] Axial flux motors are widely used in many fields, including vehicles, aerospace, ship propulsion, wind power generation, robotics, agricultural machinery, construction equipment, and elevators, due to their significant advantages such as compact structure, high torque density, high power density, and high efficiency.

[0003] In related technologies, axial flux motors include a stator assembly and two rotor assemblies. The stator assembly generates a magnetic field that acts on the two rotor assemblies. This magnetic field interacts with the current or permanent magnets in the rotor assemblies, thereby generating electromagnetic torque and driving the rotors to rotate. However, because the magnetic field generated by the stator assembly is fixed, the output torque of the axial flux motor is fixed, limiting its applicability to a single operating condition. Summary of the Invention

[0004] This application provides a stator assembly, an axial flux motor, and a vehicle, aiming to solve the problem in the related art where the magnetic field generated by the stator assembly acting on the rotor assembly is singular, resulting in a fixed output torque of the axial flux motor and limiting the applicable working conditions of the axial flux motor.

[0005] To achieve the above objectives, according to a first aspect of this application, a stator assembly is provided, comprising:

[0006] The first stator is used to generate the first magnetic field;

[0007] The second stator is arranged sequentially with the first stator along the axial direction of the stator assembly. The second stator is used to generate a second magnetic field, which is different from the first magnetic field. At least one of the first stator and the second stator can be selectively used to be electrically connected to a power source.

[0008] Optionally, the first stator includes a plurality of first stator teeth, which are arranged sequentially at intervals along the circumference of the stator assembly;

[0009] The second stator includes a plurality of second stator teeth, which are arranged sequentially at intervals along the circumference of the stator assembly. The sum of the volumes of the plurality of second stator teeth is different from the sum of the volumes of the plurality of first stator teeth.

[0010] Optionally, a plurality of second stator teeth are configured to correspond one-to-one with a plurality of first stator teeth.

[0011] Optionally, the sum of the volumes of the plurality of second stator teeth is V1, and the sum of the volumes of the plurality of first stator teeth is V2, wherein 1.2≤V2 / V1≤3.

[0012] Optionally, along the axial direction of the stator assembly, the dimensions of at least one of the plurality of second stator teeth are different from the dimensions of at least one of the plurality of first stator teeth; and / or,

[0013] Along the radial direction of the stator assembly, the dimensions of at least one of the plurality of second stator teeth are different from the dimensions of at least one of the plurality of first stator teeth; and / or,

[0014] Along the circumferential direction of the stator assembly, the dimensions of at least one of the plurality of second stator teeth are different from the dimensions of at least one of the plurality of first stator teeth.

[0015] Optionally, the first stator includes a first winding;

[0016] The second stator includes a second winding, the winding parameters of which are different from those of the first winding.

[0017] Optionally, the winding parameters include at least one of the following: number of coil turns, coil wire diameter, coil span, pole pitch, connection method, insulation material, and phase band. The number of coil turns, coil wire diameter, coil span, pole pitch, connection method, insulation material, and phase band of the first winding are respectively set differently from the number of coil turns, coil wire diameter, coil span, pole pitch, connection method, insulation material, and phase band of the second winding.

[0018] Optionally, the first winding includes a multi-phase first sub-winding, and the second winding includes a multi-phase second sub-winding. The multi-phase first sub-windings can be selectively connected in series or in parallel, and the corresponding multi-phase second sub-windings can be selectively connected in parallel or in series.

[0019] Optionally, the first stator further includes a plurality of first stator teeth, the first winding is wound on the plurality of first stator teeth, and the stator assembly further includes a plurality of first insulating sleeves, the plurality of first insulating sleeves are respectively sleeved on the plurality of first stator teeth, and the first winding is insulated and isolated from the plurality of first stator teeth through the plurality of first insulating sleeves.

[0020] Optionally, the second stator further includes a plurality of second stator teeth, the second winding is wound on the plurality of second stator teeth, and the stator assembly further includes a plurality of second insulating sleeves, the plurality of second insulating sleeves are respectively sleeved on the plurality of second stator teeth, and the second winding is insulated and isolated from the plurality of second stator teeth through the plurality of second insulating sleeves.

[0021] Optionally, it also includes multiple yokes, with two adjacent first stator teeth and / or two adjacent second stator teeth connected by the yokes.

[0022] According to a second aspect of this application, an axial flux motor is provided, comprising:

[0023] The stator assembly as described above;

[0024] Two rotor assemblies are disposed on both sides of the stator assembly along the axial direction of the stator assembly.

[0025] According to a third aspect of this application, a vehicle is also provided, the vehicle including the axial flux motor as described above.

[0026] In the stator assembly of this application embodiment, at least one of the first stator and the second stator can be selectively connected to a power source. Thus, when only the first stator is connected to the power source, it provides a first magnetic field to the corresponding rotor. The first magnetic field interacts with the corresponding rotor to generate a first torque, for example, suitable for low-speed, high-torque operating conditions. When only the second stator is connected to the power source, it provides a second magnetic field to the corresponding rotor. The second magnetic field interacts with the corresponding rotor to generate a second torque. Since the second magnetic field is different from the first magnetic field, the second torque may differ from the first torque in magnitude, direction, or characteristics, suitable for different operating conditions, such as high-speed, low-torque operating conditions. When both the first and second stators are simultaneously connected to the power source, they provide the first and second magnetic fields to the corresponding rotors, respectively. The first and second magnetic fields may superimpose or generate some complex interaction, thereby generating a third torque. The third torque may combine the characteristics of the first and second torques, possessing higher performance or adaptability, suitable for applications requiring high torque, high speed, or complex operating conditions. Therefore, the motor with this stator assembly can output multiple torques, making the motor suitable for various operating conditions. In addition, by setting up a first stator and a second stator, even if one of the first stator and the second stator fails or malfunctions, the other of the first stator and the second stator can still work normally, providing the necessary magnetic field and torque to the corresponding rotor. This greatly improves the reliability, stability and fault tolerance of the motor.

[0027] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0030] Figure 1 This is a schematic diagram of the structure of the stator assembly provided in an exemplary embodiment of this disclosure;

[0031] Figure 2 yes Figure 1 An exploded view of the stator assembly shown.

[0032] Figure 3 yes Figure 1 The diagram shows the structure of the first stator and the second stator.

[0033] Figure 4 yes Figure 1 The diagram shows a structure in which the first stator is fitted with a first insulating sleeve and the second stator is fitted with a second insulating sleeve.

[0034] Figure 5 yes Figure 1 The diagram shows the structure of the first stator, the first insulating sleeve, the second stator, and the second insulating sleeve.

[0035] Figure 6 This is a schematic diagram of the structure of an axial flux motor provided in an exemplary embodiment of this disclosure.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Stator assembly; 11. First stator; 111. First stator tooth; 112. First winding; 1121. First sub-winding; 12. Second stator; 121. Second stator tooth; 122. Second winding; 1221. Second sub-winding; 13. First insulating sleeve; 14. Second insulating sleeve; 15. Yoke; Rotor assembly 200. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0039] This application provides a stator assembly 100; please refer to [link to relevant documentation]. Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of the stator assembly provided in an exemplary embodiment of this disclosure. Figure 2 yes Figure 1 The exploded view of the stator assembly shown is as follows. Figure 3 yes Figure 1 The diagram shows the structure of the first and second stators.

[0040] It should be noted that an electric motor typically consists of a stator and a rotor. The stator is a stationary component, and its main function is to generate a magnetic field. Under the influence of this magnetic field, the rotor induces a current and forms a corresponding magnetic field. The magnetic field generated by the stator and the magnetic field generated by the rotor interact to produce an electromagnetic force, thereby driving the rotor to rotate and generating torque.

[0041] Reference Figures 1 to 3 The stator assembly 100 includes a first stator 11 and a second stator 12. The first stator 11 is used to generate a first magnetic field. The second stator 12 is arranged sequentially with the first stator 11 along the axial direction of the stator assembly 100. The second stator 12 is used to generate a second magnetic field. The second magnetic field is different from the first magnetic field. At least one of the first stator 11 and the second stator 12 can be selectively used to be electrically connected to a power source.

[0042] In the stator assembly 100 of this application embodiment, at least one of the first stator 11 and the second stator 12 can be selectively connected to a power source. Thus, when only the first stator 11 is connected to the power source, it provides a first magnetic field to the corresponding rotor. The first magnetic field interacts with the corresponding rotor to generate a first torque, for example, suitable for low-speed, high-torque operating conditions. When only the second stator 12 is connected to the power source, it provides a second magnetic field to the corresponding rotor. The second magnetic field interacts with the corresponding rotor to generate a second torque. Since the second magnetic field is different from the first magnetic field, the second torque may differ from the first torque in magnitude, direction, or characteristics, suitable for different operating conditions, such as high-speed, low-torque operating conditions. When both the first stator 11 and the second stator 12 are simultaneously connected to the power source, they provide the first magnetic field and the second magnetic field to the corresponding rotor, respectively. The first and second magnetic fields may superimpose or generate some complex interaction, thereby generating a third torque. The third torque may combine the characteristics of the first and second torques, possessing higher performance or adaptability, suitable for applications requiring high torque, high speed, or complex operating conditions. This allows the motor with the stator assembly 100 to output various torques, making it suitable for a variety of operating conditions. Furthermore, by providing a first stator 11 and a second stator 12, even if one of the first stator 11 or the second stator 12 fails or malfunctions, the other stator 11 or the second stator 12 can still operate normally, providing the necessary magnetic field and torque to the corresponding rotor. This greatly improves the reliability, stability, and fault tolerance of the motor.

[0043] It should be noted that the second stator 12 can be an integral structure or a separate structure; specifically, this application does not limit this.

[0044] Reference Figure 2 and Figure 3 In some embodiments, the first stator 11 includes a plurality of first stator teeth 111, which are arranged sequentially at intervals along the circumference of the stator assembly 100. The second stator 12 includes a plurality of second stator teeth 121, which are also arranged sequentially at intervals along the circumference of the stator assembly 100. Thus, since the first stator teeth 111 and the second stator teeth 121 are each arranged sequentially at intervals along the circumference of the stator assembly 100, this arrangement ensures the uniformity and symmetry of the stator assembly 100 on the circumference, contributing to a stable distribution of the electromagnetic field and reducing the generation of harmonics. Furthermore, in some embodiments, the sum of the volumes of the plurality of second stator teeth 121 is different from the sum of the volumes of the plurality of first stator teeth 111. This optimizes the distribution of the electromagnetic field in the stator assembly 100, allowing the motor with this stator assembly 100 to output various torques, making the motor suitable for various operating conditions. In addition, this design can also improve the efficiency and power factor of the motor.

[0045] In some embodiments, a plurality of second stator teeth 121 are arranged in a one-to-one correspondence with a plurality of first stator teeth 111. This one-to-one correspondence ensures precise alignment between the second stator teeth 121 and the first stator teeth 111, reducing assembly errors and improving the overall structural stability of the motor. The one-to-one correspondence between the multiple second stator teeth 121 and the multiple first stator teeth 111 also results in a more uniform distribution of magnetic flux among the multiple second stator teeth 121 and the multiple first stator teeth 111, reducing vibration and noise caused by uneven force distribution and improving the smoothness of motor operation. Furthermore, the one-to-one correspondence between the multiple second stator teeth 121 and the multiple first stator teeth 111 allows the stator assembly to form a smoother magnetic flux path, reducing magnetic resistance and improving the utilization efficiency of magnetic flux.

[0046] It should be noted that in other embodiments, one second stator tooth 121 may be correspondingly configured with at least two first stator teeth 111. Alternatively, one first stator tooth 111 may be correspondingly configured with at least two second stator teeth 121. Specifically, the correspondence between multiple second stator teeth 121 and multiple first stator teeth 111 can be set as needed, and this application does not limit this.

[0047] In addition, the plurality of second stator teeth 121 and the plurality of first stator teeth 111 can be formed by stamping. In some other embodiments, the second stator teeth 121 and the first stator teeth 111 can also be formed by die casting or sintering. Specifically, this application does not limit this.

[0048] Continue to refer to Figure 2 and Figure 3 In some embodiments, the sum of the volumes of the plurality of second stator teeth 121 is V1, and the sum of the volumes of the plurality of first stator teeth 111 is V2, wherein 1.2 ≤ V2 / V1 ≤ 3. Thus, by limiting the ratio of the sum of the volumes of the plurality of first stator teeth 111 to the sum of the volumes of the plurality of second stator teeth 121 to 1.2 ≤ V2 / V1 ≤ 3, the different magnetic fields generated by the first stator 11 and the second stator 12 can be effectively distinguished, allowing the motor with this stator assembly 100 to output different torques as needed, thereby meeting the requirements of various operating conditions. Furthermore, when V2 / V1 = 1.2, the volume of the first stator teeth 111 is slightly larger than that of the second stator teeth 121, ensuring that the cross-sectional area of ​​the main magnetic circuit is sufficient to carry the fundamental magnetic flux and avoid magnetic saturation. Simultaneously, the smaller volume of the second stator teeth 121 limits their magnetic field strength for harmonic compensation or leakage flux suppression. When V2 / V1=3, the volume of the first stator tooth 111 is significantly larger than that of the second stator tooth 121, forming a "strong main magnetic circuit + weak auxiliary magnetic circuit" structure. The first stator 11 can concentrate energy to output high torque, while the second stator 12 focuses on high frequency harmonic suppression.

[0049] When V2 / V1 < 1.2, the volume of the first stator tooth 111 is insufficient, making it prone to saturation under overload, leading to a sharp increase in iron losses; the volume of the second stator tooth 121 is too large, which may introduce additional harmonics. When V2 / V1 > 3, the volume of the second stator tooth 121 is too small, making it unable to effectively regulate the magnetic field and reducing the cooperative efficiency.

[0050] The dimensions of the stator teeth along the axial direction of the stator assembly 100 directly affect the winding distribution and current density thereon. In some embodiments, along the axial direction of the stator assembly 100, the dimensions of at least one of the plurality of second stator teeth 121 are different from the dimensions of at least one of the plurality of first stator teeth 111. For example, if the dimensions of the first stator teeth 111 are larger than the dimensions of the second stator teeth 121, the first stator teeth 111 can accommodate more windings, thereby generating a stronger magnetic field when energized. The smaller dimensions of the second stator teeth 121 may generate a relatively weaker magnetic field.

[0051] Furthermore, the difference in size between the first stator tooth 111 and the second stator tooth 121 leads to differences in magnetic field strength and distribution. When different magnetic fields interact with the rotor, they generate different electromagnetic forces, resulting in different motor output torques. Therefore, by selecting different magnetic fields or combinations of magnetic fields as needed, the motor can be suitable for applications requiring high torque output, low torque output, or other applications requiring a balance between high and low torque output.

[0052] The radial dimensions of the stator teeth affect the path of magnetic flux. In one embodiment, along the radial direction of the stator assembly 100, the dimensions of at least one of the plurality of second stator teeth 121 are different from the dimensions of at least one of the plurality of first stator teeth 111. For example, when the dimensions of the first stator teeth 111 are larger than the dimensions of the second stator teeth 121, the first stator teeth 111 may provide more magnetic flux paths, making it easier for magnetic flux to pass through, thereby enhancing the magnetic field strength in the region corresponding to the first stator teeth 111. Conversely, the smaller dimensions of the second stator teeth 121 may restrict the flow of magnetic flux, resulting in a relatively weaker magnetic field strength.

[0053] Furthermore, the difference in radial dimensions between the first stator tooth 111 and the second stator tooth 121 leads to differences in magnetic field strength and distribution. When these different magnetic fields interact with the rotor, they generate different electromagnetic force distributions, resulting in different motor output torques. Therefore, by selecting different magnetic fields or combinations thereof as needed, the motor can be suitable for applications requiring high torque output, low torque output, or other applications requiring a balance between high and low torque output.

[0054] The circumferential dimensions of the stator teeth affect the magnetic field strength. In some embodiments, along the circumference of the stator assembly 100, the dimensions of at least one of the plurality of second stator teeth 121 are different from the dimensions of at least one of the plurality of first stator teeth 111. For example, when the circumferential dimension of the first stator tooth 111 is larger than the circumferential dimension of the second stator tooth 121, the first stator tooth 111 may provide a wider magnetic flux path, resulting in a stronger magnetic field strength in the region corresponding to the first stator tooth 111. The second stator teeth 121, on the other hand, may restrict the flow of magnetic flux, resulting in a weaker magnetic field strength in the region corresponding to the second stator tooth 121.

[0055] Furthermore, due to the dimensional differences between the first stator teeth 111 and the second stator teeth 121 along the circumferential direction of the stator assembly 100, the magnetic field strength and distribution differ. When these different magnetic fields interact with the rotor, they generate different electromagnetic forces, resulting in different motor output torques. Therefore, by selecting different magnetic fields or combinations of magnetic fields as needed, the motor can be suitable for applications requiring high torque output, low torque output, or other applications requiring a balance between high and low torque output.

[0056] Reference Figure 2 In one embodiment, the first stator 11 includes a first winding 112, and the second stator 12 includes a second winding 122. The winding parameters of the second winding 122 are different from those of the first winding 112. Thus, different winding parameters affect the electrical characteristics of the windings, such as inductance and resistance, thereby affecting the magnetic field distribution of the stator. By setting different winding parameters, the magnetic fields generated by the first stator 11 and the second stator 12 can be different, allowing the motor to output various different torques as needed, thereby meeting the requirements of different operating conditions.

[0057] The winding parameters can be selected as needed. For example, in one embodiment, the winding parameters include at least one of the following: number of coil turns, coil wire diameter, coil span, pole pitch, connection method, insulation material, and phase band. At least one of the following parameters of the first winding 112 is correspondingly different from at least one of the following parameters of the second winding 122: number of coil turns, coil wire diameter, coil span, pole pitch, connection method, insulation material, and phase band. This allows the first stator 11 and the second stator 12 to generate different magnetic fields, enabling the motor with the first stator 11 and the second stator 12 to output various torques as needed, thereby meeting the requirements of various operating conditions.

[0058] It should be noted that the number of coil turns refers to the number of turns of wire wound in each coil or winding. The number of coil turns directly affects the electrical parameters of the winding, such as resistance and inductance, and thus the performance of the motor. The coil wire diameter refers to the diameter of the wire used to make the winding. The size of the coil wire diameter determines the cross-sectional area of ​​the wire, which in turn affects the resistance and current carrying capacity of the winding. The coil span refers to the number of slots between the two effective sides of each coil, which are respectively embedded in two different slots of the iron core. The pole pitch refers to the number of stator slots occupied by each magnetic pole along the inner circle of the stator iron core. The formula for calculating the pole pitch is T = z / 2p, where z is the total number of slots in the stator iron core and 2p is the number of pole pairs of the motor. The connection method describes the electrical connection between coils or windings, such as series or parallel connection. Different connection methods will affect the resistance and inductance of the winding and the overall performance of the motor. Insulating materials are used to ensure electrical isolation between the windings and the stator iron core, and between windings. Common insulation materials include polyester enameled wire, polyurethane enameled wire, and polyimide enameled wire. A phase band refers to a three-phase winding where each pole occupies an electrical angle of 180°, and each phase band occupies 60° of electrical angle. During winding and connection, q elements within a phase band are often connected in series to form a group called a pole-phase group, commonly known as a "connection".

[0059] In addition, the first winding 112 and the second winding 122 can be wound in a concentrated manner or in a distributed manner. Specifically, this application does not limit this.

[0060] Reference Figure 1 and Figure 2 In some embodiments, the first winding 112 includes a multi-phase first sub-winding 1121, and the second winding 122 includes a multi-phase second sub-winding 1221. The multi-phase first sub-winding 1121 can be selectively connected in series or in parallel, and the corresponding multi-phase second sub-winding 1221 can be selectively connected in parallel or in series. Thus, when the multi-phase first sub-winding 1121 is connected in series, the multi-phase second sub-winding 1221 is connected in parallel. When the multi-phase first sub-winding 1121 is connected in parallel, the multi-phase second sub-winding 1221 is connected in series. By making the series and parallel connections of the multi-phase first sub-winding 1121 and the multi-phase second sub-winding 1221 different, the magnetic fields generated by the first stator 11 and the second stator 12 are different, allowing the motor having this stator assembly 100 to adjust the output torque as needed, making the motor suitable for different operating conditions.

[0061] It's important to note that when sub-windings are connected in series, current flows through each sub-winding sequentially, causing the magnetic field to accumulate across the series-connected sub-windings, thus increasing the overall magnetic field strength. Series connection is suitable for applications requiring high magnetic field strength. When sub-windings are connected in parallel, current flows through each sub-winding simultaneously, causing each sub-winding to generate its own magnetic field, but the overall magnetic field strength does not accumulate due to parallel connection. Parallel connection can provide greater current capacity and is suitable for applications requiring high current output.

[0062] Furthermore, the number of phases of the first sub-winding 1121 can be selected as needed. For example, the number of phases of the first sub-winding 1121 can be two-phase, three-phase, four-phase, or even more phases. Specifically, this application does not limit this. Similarly, the number of phases of the second sub-winding 1221 can be selected as needed. For example, the number of phases of the second sub-winding 1221 can be two-phase, three-phase, four-phase, or even more phases. Specifically, this application does not limit this.

[0063] At least one of the first stator 11 and the second stator 12 can be selectively connected to the power supply, depending on the need. For example, in one embodiment, the first winding 112 and the second winding 122 can be connected to the power supply independently or simultaneously. This allows for better matching with actual operation, thereby improving motor efficiency. Furthermore, since the first winding 112 and the second winding 122 can operate independently, the motor's fault tolerance in the event of winding failure is further enhanced.

[0064] Continue to refer to Figure 4 and Figure 5 In some embodiments, the first stator 11 includes a plurality of first stator teeth 111, and a first winding 112 is wound around the plurality of first stator teeth 111. The stator assembly 100 also includes a plurality of first insulating sleeves 13, which are respectively sleeved on the plurality of first stator teeth 111, and the first winding 112 is insulated from the plurality of first stator teeth 111 by the plurality of first insulating sleeves 13. In this way, the use of the first insulating sleeves 13 effectively prevents current from leaking from the first winding 112 to the first stator teeth 111, ensuring that the current flows only in the first winding 112, thereby improving the safety and stability of the motor. The first insulating sleeves 13 can protect the first stator teeth 111 from the direct action of current, preventing damage to the stator teeth due to excessive current or short circuits.

[0065] It should be noted that the first insulating sleeve 13 is typically made of high-insulation materials, such as insulating paper or insulating fiberboard, which has high insulation capacity and can significantly improve the insulation performance of the motor. The installation of the first insulating sleeve 13 should ensure a tight fit without loosening or damage. During motor operation, the condition of the first insulating sleeve 13 can be checked periodically; if damaged or aged, it should be replaced promptly to extend the motor's service life.

[0066] Refer again Figure 4 and Figure 5 In some embodiments, the second stator 12 includes second stator teeth 121, and a second winding 122 is wound around a plurality of second stator teeth 121. The stator assembly 100 also includes a plurality of second insulating sleeves 14, which are respectively sleeved on the plurality of second stator teeth 121, and the second winding 122 is insulated from the plurality of second stator teeth 121 by the plurality of second insulating sleeves 14. In this way, the use of the second insulating sleeves 14 effectively prevents current from leaking from the second winding 122 to the second stator teeth 121, ensuring that the current flows only in the second winding 122, thereby improving the safety and stability of the motor. The second insulating sleeves 14 can protect the second stator teeth 121 from the direct action of current, preventing damage to the stator teeth due to excessive current or short circuits.

[0067] It should be noted that the second insulating sleeve 14 is typically made of high-insulation materials, such as insulating paper or insulating fiberboard, which has high insulation capacity and can significantly improve the insulation performance of the motor. The installation of the second insulating sleeve 14 should ensure a tight fit without loosening or damage, in order to extend the service life of the motor.

[0068] Furthermore, the first insulating sleeve 13 and the second insulating sleeve 14 can be molded or machined. Specifically, this application does not limit this. The first insulating sleeve 13 and the second insulating sleeve 14 are respectively fitted onto the first stator tooth 111 and the second stator tooth 121 and fixed with glue, thereby effectively preventing the first insulating sleeve 13 from detaching from the first stator tooth 111 and the second insulating sleeve 14 from detaching from the second stator tooth 121, effectively improving the electrical isolation effect.

[0069] Reference Figure 3 In some embodiments, the stator assembly 100 further includes multiple yokes 15, with adjacent first stator teeth 111 and / or adjacent second stator teeth 121 connected via the yokes 15. This allows the multiple first stator teeth 111 to form a more robust overall structure, and the multiple second stator teeth 121 to form a more robust overall structure, thereby improving the stability of the stator assembly 100 during motor operation. Furthermore, the presence of the yokes 15 increases the mechanical strength of the stator assembly 100, enabling it to withstand greater electromagnetic forces and mechanical stresses. The connection of adjacent first stator teeth 111 and / or adjacent second stator teeth 121 via the yokes 15 allows the stator assembly 100 to provide a magnetization path with higher permeability, which helps ensure smooth flow of magnetic flux within the stator assembly 100, thereby optimizing the motor's magnetic circuit design. Through a well-designed yoke 15, the loss of magnetomotive force in the magnetic circuit can be reduced, lowering magnetic circuit losses and thus improving motor efficiency.

[0070] It should be noted that the first stator tooth 111 and the yoke 15 can be an integral structure or a separate structure. The second stator tooth 121 and the yoke 15 can also be an integral structure or a separate structure. Specifically, this application does not limit this.

[0071] According to the second aspect of this disclosure, referring to Figure 6 An axial flux motor is provided, including a stator assembly 100 as described above and two rotor assemblies 200, the two rotor assemblies 200 being disposed on both sides of the stator assembly 100 along the axial direction of the stator assembly 100. The structure of the stator assembly 100 is as described above. Since this axial flux motor adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here.

[0072] It should be noted that this axial flux motor can operate as a single motor or in dual motor mode. Furthermore, when operating as a single motor, it can have either three-phase or multi-phase windings, which significantly improves the motor's torque output capability and enhances its fault tolerance. In addition, this axial flux motor can switch the operating mode and series connection of the first winding 112 and the second winding 122 to meet different operating conditions, thus expanding the high-efficiency range of the axial flux motor.

[0073] Specifically, the switching between the operating modes and series connection method of the first winding 112 and the second winding 122 can be performed by a control switch. However, this application does not impose any specific limitations on this.

[0074] According to a third aspect of this application, a vehicle is provided, including an axial flux motor. The structure of the axial flux motor is as described above. Since this vehicle adopts all the technical solutions of all the above embodiments, it has at least the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0075] The vehicle may be a plug-in hybrid electric vehicle or a new energy vehicle, and this disclosure does not specifically limit it.

[0076] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0077] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0078] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0079] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A stator assembly characterized by, include: The first stator is used to generate the first magnetic field; The second stator is arranged sequentially with the first stator along the axial direction of the stator assembly. The second stator is used to generate a second magnetic field, which is different from the first magnetic field. At least one of the first stator and the second stator can be selectively used to be electrically connected to a power source.

2. The stator assembly of claim 1, wherein, The first stator includes a plurality of first stator teeth, which are arranged sequentially at intervals along the circumference of the stator assembly; The second stator includes a plurality of second stator teeth, which are arranged sequentially at intervals along the circumference of the stator assembly. The sum of the volumes of the plurality of second stator teeth is different from the sum of the volumes of the plurality of first stator teeth.

3. The stator assembly of claim 2, wherein, Multiple first stator teeth are configured in a one-to-one correspondence with multiple second stator teeth.

4. The stator assembly of claim 2, wherein, The sum of the volumes of the plurality of second stator teeth is V1, and the sum of the volumes of the plurality of first stator teeth is V2, wherein 1.2≤V2 / V1≤3.

5. The stator assembly of claim 2, wherein, Along the axial direction of the stator assembly, the dimensions of at least one of the plurality of second stator teeth are different from the dimensions of at least one of the plurality of first stator teeth; and / or, Along the radial direction of the stator assembly, the dimensions of at least one of the plurality of second stator teeth are different from the dimensions of at least one of the plurality of first stator teeth; and / or, Along the circumferential direction of the stator assembly, the dimensions of at least one of the plurality of second stator teeth are different from the dimensions of at least one of the plurality of first stator teeth.

6. A stator assembly according to any one of claims 1 to 5, characterised in that, The first stator includes a first winding; The second stator includes a second winding, the winding parameters of which are different from those of the first winding.

7. The stator assembly of claim 6, wherein, The winding parameters include at least one of the following: number of coil turns, coil wire diameter, coil span, pole pitch, connection method, insulation material, and phase band. At least one of the following parameters of the first winding is correspondingly different from at least one of the following parameters of the second winding: number of coil turns, coil wire diameter, coil span, pole pitch, connection method, insulation material, and phase band.

8. The stator assembly according to claim 6, characterized in that, The first winding includes a multi-phase first sub-winding, and the second winding includes a multi-phase second sub-winding. The multi-phase first sub-windings can be selectively connected in series or in parallel, and the corresponding multi-phase second sub-windings can be selectively connected in parallel or in series.

9. The stator assembly according to claim 6, characterized in that, The first stator further includes a plurality of first stator teeth, and the first winding is wound on the plurality of first stator teeth. The stator assembly further includes a plurality of first insulating sleeves, which are respectively sleeved on the plurality of first stator teeth. The first winding is insulated and isolated from the plurality of first stator teeth through the plurality of first insulating sleeves.

10. The stator assembly according to claim 6, characterized in that, The second stator further includes a plurality of second stator teeth, and the second winding is wound on the plurality of second stator teeth. The stator assembly further includes a plurality of second insulating sleeves, which are respectively sleeved on the plurality of second stator teeth. The second winding is insulated and isolated from the plurality of second stator teeth through the plurality of second insulating sleeves.

11. The stator assembly according to any one of claims 2 to 5, characterized in that, It also includes multiple yokes, with two adjacent first stator teeth and / or two adjacent second stator teeth connected by the yokes.

12. An axial flux motor, characterized in that, include: The stator assembly as described in any one of claims 1 to 11; as well as, Two rotor assemblies are disposed on both sides of the stator assembly along the axial direction of the stator assembly.

13. A vehicle, characterized in that, Including the axial flux motor as described in claim 12.

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