Electric machines and electronic devices

Abstract

This application provides an electric motor and an electronic device. The motor includes a housing, a first yoke, a second yoke, a rotor, a plurality of first claw poles, and windings. The outer and inner contours of the housing are both rectangular or rounded rectangular in cross-section of a first plane. At least a portion of at least one of the first claw poles has a non-uniform thickness dimension in the radial direction of the motor, and / or at least a portion of the plurality of first claw poles has a non-uniform thickness dimension in the radial direction of the motor. In this application, by designing the outer contour of the housing as a rectangle or rounded rectangle to fit the reserved installation area of ​​the electronic device, the space utilization of the electronic device is improved. By adopting a non-uniform thickness design for the first claw poles, the upper limit of local magnetic saturation of the first claw poles can be increased, thereby weakening the magnetic flux density saturation degree of the first claw poles and increasing the air gap magnetic flux density, thereby improving the torque output capability of the motor.

Description

Technical Field

[0001] This application relates to the field of motor technology, specifically to a motor and electronic device. Background Technology

[0002] Claw-pole stepper motors are widely used in precision instruments due to their high precision, fast response, and simple control. However, existing claw-pole stepper motors are primarily designed in a circular shape, while the space allocated to the motor by electronic devices is usually rectangular (e.g., square), resulting in some wasted space. Summary of the Invention

[0003] This application provides an electric motor and an electronic device. The electric motor includes a housing, a first magnetic yoke, a second magnetic yoke, a rotor, a plurality of first claw poles, and windings. By designing the outer contour of the housing as a rectangle or a rounded rectangle, it can be adapted to the installation area reserved for the electronic device, thereby improving the space utilization of the electronic device.

[0004] In a first aspect, this application provides an electric motor. The electric motor includes: a housing having a mounting space, wherein a first opening and a second opening are formed on opposite sides of the housing, the first opening and the second opening being arranged along the axial direction of the motor; the outer contour and inner contour of the housing having a rectangular or rounded rectangular cross-section in a first plane, wherein the first plane is perpendicular to the axial direction of the motor; a first magnetic yoke and a second magnetic yoke, the first magnetic yoke and the second magnetic yoke being respectively mounted at the first opening and the second opening, and both connected to the housing; the first magnetic yoke having a first through hole, and the second magnetic yoke having a second through hole; and a rotor mounted along the axial direction of the motor within the mounting space and passing through the first through hole. The device includes a hole and a second through hole; a plurality of first claw poles, all mounted on a first yoke, the plurality of first claw poles being arranged circumferentially at intervals along the first through hole and surrounding the rotor, at least a portion of at least one of the first claw poles having a non-uniform thickness dimension in the radial direction of the motor, and / or, at least a portion of the plurality of first claw poles having a non-uniform thickness dimension in the radial direction of the motor; a winding is disposed between the inner wall of the mounting space and the plurality of first claw poles and surrounding the plurality of first claw poles, the outer contour of the winding having a rectangular or rounded rectangular cross-section in the first plane, and the inner contour of the winding having a non-circular cross-section in the first plane.

[0005] In this application, since the outer contour of the housing can have a rectangular or rounded rectangular cross-section on the first plane, the shape of the housing can be adapted to the reserved installation area of ​​the electronic device, thereby improving the space utilization when the motor is installed in the electronic device. Furthermore, due to the housing's shape design, the overall size of the motor can be increased, which is beneficial for improving the overall output torque of the motor.

[0006] In this application, the space formed between the multiple first claw poles and the inner wall of the housing is used to house the winding, which improves the installation stability of the winding. By designing the outer contour of the winding to have a rectangular or rounded rectangular cross-section on the first plane, the winding size can be increased, which is beneficial to increasing the current intensity after the winding is energized, thereby improving the output torque of the motor.

[0007] In this application, since the inner contour of the winding can have a non-circular cross-section in the first plane, and the first claw pole adopts a non-uniform thickness design, the upper limit of local magnetic saturation of the first claw pole can be increased, thereby weakening the magnetic flux density saturation of the first claw pole, increasing the air gap magnetic flux density, and thus improving the torque output capability of the motor. Here, the air gap refers to the region between the first claw pole and the rotor.

[0008] In some possible implementations, the inner contour of the winding has a rectangular or rounded rectangle cross-section in the first plane to provide more space for the first claw pole, which is conducive to the design of the first claw pole with unequal thickness, increases the local magnetic saturation upper limit, weakens the magnetic flux density saturation of the first claw pole, increases the air gap magnetic flux density, and thus improves the torque output capability of the motor.

[0009] In some possible implementations, the inner contour of the winding has a rounded rectangle in the cross section of the first plane, and the inner contour of the winding has four fourth rounded corners, which is beneficial to increase the local thickness of the first claw pole, thereby increasing the local magnetic saturation upper limit of the first claw pole, so as to weaken the magnetic flux density saturation of the first claw pole, increase the air gap magnetic flux density, and thus improve the torque output capability of the motor.

[0010] In some possible implementations, the winding includes four straight sides and four curved sides, with the curved sides connecting two adjacent straight sides; along the radial direction of the motor, the size of the first claw pole positioned opposite the curved side is larger than the size of the first claw pole positioned opposite the straight side.

[0011] In this implementation, the distance between the arc-shaped edge and the rotor is greater than the distance between the straight edge and the rotor, which allows the first claw pole facing the arc-shaped edge to have a greater thickness, thereby increasing the upper limit of magnetic saturation of the first claw pole facing the arc-shaped edge, weakening the saturation degree of magnetic flux density of the first claw pole facing the arc-shaped edge, increasing the air gap magnetic flux density, and thus improving the torque output capability of the motor.

[0012] In some possible implementations, in the first claw pole positioned directly opposite the straight edge, the first claw pole has a minimum dimension along the radial direction of the motor at the intersection with the second plane, wherein the second plane passes through the center of the motor and is perpendicular to the straight edge.

[0013] In this implementation, since the outer surface of the rotor is arc-shaped and the inner surface of the straight edge is flat, the first claw pole, which is positioned directly opposite the straight edge, can be designed with non-uniform thickness. The first claw pole has a minimum radial dimension along the motor at the intersection with the second plane, and other areas of the first claw pole can be set with a larger thickness dimension, thereby increasing the upper limit of local magnetic saturation of the first claw pole, weakening the saturation degree of magnetic flux density of the first claw pole, increasing the air gap magnetic flux density, and thus improving the torque output capability of the motor.

[0014] In some possible implementations, a portion of the first claw pole is located within the first through hole to avoid creating a directly connected magnetic flux path between two adjacent first claw poles, which would affect the normal operation of the motor.

[0015] In some possible implementations, the profile of the first claw pole facing the winding surface is elliptical, circular, or polygonal.

[0016] In some possible implementations, the motor also includes multiple second claw poles, all of which are mounted on the second magnetic yoke. The multiple second claw poles are arranged at circumferential intervals along the second through hole and are arranged around the rotor. The multiple second claw poles and the multiple first claw poles are arranged alternately along the circumference of the motor.

[0017] In this implementation, because the motor includes a claw pole structure, it is also called a claw pole motor. Through the above structural design, the motor can drive the rotor to rotate magnetically. To illustrate, the magnet faces the magnetic pole surface of the winding. Specifically, the achievable magnetic flux path is: N-pole magnet - gap between magnet and first claw pole - first yoke / second yoke - second claw pole - gap between second claw pole and magnet - S-pole magnet - core - N-pole magnet.

[0018] In this implementation, the first claw pole is mounted on the first magnetic yoke, and the second claw pole is mounted on the second magnetic yoke. This allows the first and second claw poles to be processed separately before assembly, which helps reduce the difficulty of manufacturing and assembly. The alternating arrangement of multiple second claw poles and multiple first claw poles along the circumference of the motor improves the uniformity of magnetic flux distribution.

[0019] In some possible implementations, at least a portion of at least one second claw pole has a non-uniform thickness dimension in the radial direction of the motor.

[0020] In some possible implementations, at least some of the second claw poles have non-uniform thickness dimensions in the radial direction of the motor.

[0021] In this implementation, since the inner contour of the winding can have a non-circular cross-section in the first plane, and the second claw pole adopts a non-uniform thickness design, the upper limit of local magnetic saturation of the second claw pole can be increased, thereby weakening the saturation degree of magnetic flux density of the second claw pole, increasing the air gap magnetic flux density, and thus improving the torque output capability of the motor. Here, the air gap refers to the region between the second claw pole and the rotor.

[0022] In some possible implementations, the outer contour of the winding has a rounded rectangle in the cross-section of the first plane, and the outer contour of the winding has four second rounded corners; the inner contour of the outer shell has a rounded rectangle in the cross-section of the first plane, and the inner contour of the outer shell has four third rounded corners.

[0023] In this implementation, the rounded corners on the outer contour of the winding facilitate winding preparation. Specifically, compared to a right-angled structure, a rounded corner structure is easier to form during winding preparation, reducing the difficulty of winding preparation. The rounded corners on the inner contour of the housing create an assembly space that fits the winding, improving space utilization. This allows for an increase in the size of the housing while still housing the winding, which is beneficial for increasing the motor's output torque.

[0024] In some possible implementations, the outer contour of the shell has a rounded rectangle in cross-section of the first plane, and the outer contour of the shell has four first rounded corners.

[0025] In this implementation, such a design is beneficial for the processing of the housing and can also prevent the four corners of the outer contour of the housing from being too sharp, which would affect the installation and damage other structures of the electronic device.

[0026] In some possible implementations, the first magnetic yoke and the outer shell are integrated into one structure to improve the stability of the connection between the first magnetic yoke and the outer shell, thereby increasing the overall structural strength. Alternatively, the second magnetic yoke and the outer shell are integrated into one structure to improve the stability of the connection between the second magnetic yoke and the outer shell, thereby increasing the overall structural strength.

[0027] In some possible implementations, the motor includes multiple sets of stators, each set of stators including a housing, a first magnetic yoke, a second magnetic yoke, multiple first claw poles and windings; the multiple sets of stators are arranged along the axial direction of the motor, and the rotor passes through the multiple sets of stators.

[0028] In this implementation, multiple stators can be arranged along the axial direction of the motor, and the rotor passes through multiple stators. The multiple stators are used to drive the rotor to rotate together, which can reduce the step angle of the motor and improve the driving accuracy.

[0029] Secondly, this application also provides an electronic device. The electronic device includes a motor as described in any of the first aspects.

[0030] In this application, the space utilization of electronic devices can be improved through the external design of the motor, and the torque output of the motor can be improved through the unequal thickness design of the claw poles inside the motor, thereby providing the driving force for the electronic devices and improving the user experience of the electronic devices. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the motor provided in this application in some embodiments;

[0032] Figure 2 yes Figure 1 The diagram shows a partial structural exploded view of the motor in some embodiments.

[0033] Figure 3 yes Figure 1 The diagram shows a partial structural schematic of the motor in some embodiments after it has been cut open along line AA.

[0034] Figure 4A yes Figure 2 The diagram shows the connection structure of the outer casing, the first magnetic yoke, and the first claw pole in some embodiments of the motor shown.

[0035] Figure 4B yes Figure 4A The diagram shown is a schematic representation of a structure in some embodiments in which windings are installed.

[0036] Figure 5A yes Figure 4B The diagram shown is a schematic representation of a rotor mounted in some embodiments.

[0037] Figure 5B yes Figure 5A A schematic diagram of the structure shown from another perspective;

[0038] Figure 6A yes Figure 5A The diagram shown illustrates the installation of a second magnetic yoke and a second claw pole structure in some embodiments.

[0039] Figure 6B yes Figure 6A The diagram shows the structure after being cut along line BB in some embodiments;

[0040] Figure 7 yes Figure 6B A schematic diagram of the structure shown from another perspective;

[0041] Figure 8 yes Figure 1 A schematic diagram comparing the torque capabilities of the electric motor and the circular motor provided in the embodiment. Detailed Implementation

[0042] The embodiments of this application are described below with reference to the accompanying drawings.

[0043] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Multiple" refers to at least two.

[0044] The directional terms mentioned in the embodiments of this application, such as "upper", "lower", "inner", "outer", "top", "bottom", "side", etc., are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, 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.

[0045] In the embodiments of this application, the relative positional relationships mentioned, such as parallel, perpendicular, and aligned, are defined in relation to the current technological level, rather than being absolutely strict. Slight deviations are permissible; approximations of parallelism, perpendicularity, or alignment are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0046] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0047] This application provides an electronic device. In some embodiments, the electronic device may be, but is not limited to, information and communication technology (ICT) and consumer electronics products such as precision instruments, precision transmission equipment, laptops, and in-vehicle equipment.

[0048] For example, an electronic device may include a motor, a housing, and a transmission component. The motor and the transmission component may be mounted in the housing, and the motor is driven by the transmission component to drive its movement.

[0049] In some examples, the motor can drive the transmission component to rotate, either directly or indirectly.

[0050] In other examples, the motor can be indirectly connected to the transmission components, and the rotational output of the motor can be converted into other forms of output through other transmission connections, so as to drive the transmission components to achieve other forms of motion, which is beneficial for driving the transmission components to achieve linear motion, elliptical trajectory motion, etc.

[0051] The transmission component can be a part, such as a gear, bearing, rack, or connecting rod; or it can be an integral structure, such as a module or component in an electronic device.

[0052] Please refer to the following: Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of the motor 10 provided in this application in some embodiments; Figure 2 yes Figure 1 The diagram shows a partial structural exploded view of the motor 10 in some embodiments. Figure 3 yes Figure 1 The diagram shows a partial structural schematic of the motor 10 after it has been cut open along line AA in some embodiments.

[0053] In some embodiments, the motor 10 may include at least one set of stators 1 and rotors 2, with the rotors 2 passing through the stators 1 and the stators 1 used to drive the rotors 2 to rotate. When the motor 10 includes multiple sets of stators 1, the multiple sets of stators 1 can be arranged along the axial direction of the motor 10, with the rotors 2 passing through the multiple sets of stators 1. The multiple sets of stators 1 are used to jointly drive the rotors 2 to rotate, which can reduce the step angle of the motor 10 and improve the driving accuracy.

[0054] It should be noted that, Figure 1 The motor 10 is illustrated by including two sets of stators 1. It can be understood that in some other embodiments, the motor 10 may include one set of stators 1 or more than three sets of stators 1, which is not limited here.

[0055] For example, each stator 1 may include a housing 11, a first yoke 12, a second yoke 13, a plurality of first claw poles 14, a plurality of second claw poles 15, and a winding 16. The first yoke 12 and the second yoke 13 may be connected to opposite sides of the housing 11, respectively. The plurality of first claw poles 14 may be connected to the first yoke 12 and located inside the housing 11. The plurality of second claw poles 15 may be connected to the second yoke 13 and located inside the housing 11. The winding 16 may be located between the first claw poles 14 and the inner wall of the housing 11, and between the second claw poles 15 and the inner wall of the housing 11. The rotor 2 passes through the housing 11 along the axial direction of the motor 10 and through the area enclosed by the plurality of first claw poles 14 and the area enclosed by the plurality of second claw poles 15. The rotor 2 may include an iron core 201 and a plurality of magnets 202, wherein the plurality of magnets 202 are arranged to enclose the iron core 201, and the plurality of magnets 202 of different polarities are alternately arranged along the circumference of the iron core 201.

[0056] In this embodiment, since the motor 10 includes a claw pole structure, it is also called a claw pole motor. Through the above structural design, the motor 10 can drive the rotor 2 to rotate magnetically. The magnetic flux path that can be achieved is illustrated by the magnet 202 facing the magnetic pole surface of the winding 16: N-pole magnet 202 - gap between magnet 202 and the first claw pole 14 - first yoke 12 / second yoke 13 - second claw pole 15 - gap between the second claw pole 15 and magnet 202 - S-pole magnet 202 - core 201 - N-pole magnet 202.

[0057] It should be noted that, Figure 2 The embodiment is illustrated with rotor 2 including 10 magnets 202. It can be understood that in some other embodiments, rotor 2 may also include other numbers of magnets 202, which may include more or fewer magnets 202. The number of first claw poles 14 and second claw poles 15 can be adaptively adjusted according to the number of magnets 202.

[0058] Please refer to the following: Figures 2 to 4A , Figure 4A yes Figure 2 The diagram shows the connection structure of the outer casing 11, the first magnetic yoke 12, and the first claw pole 14 in some embodiments of the motor 10 shown.

[0059] In some embodiments, the outer contour of the housing 11 can have a rectangular or rounded rectangular cross-section in the first plane. The first plane is perpendicular to the axial direction of the motor 10.

[0060] In this embodiment, since the outer contour of the housing 11 can be rectangular or rounded rectangular in cross-section on the first plane, the shape of the housing 11 can be adapted to the reserved installation area of ​​the electronic device 100, thereby improving the space utilization when the motor 10 is installed in the electronic device 100. In addition, due to the shape design of the housing 11, the overall size of the motor 10 can be made larger, which is beneficial to improving the overall output torque of the motor 10.

[0061] For example, the outer contour of the housing 11 can be a rounded rectangle in the cross section of the first plane. The outer contour of the housing 11 has four first rounded corners 111. In other words, rounded chamfers are processed at the four corners of the outer contour of the housing 11 to form the first rounded corners 111. This design is beneficial to the processing of the housing 11 and can also prevent the four corners of the outer contour of the housing 11 from being too sharp, which would affect the installation and damage other structures of the electronic device 100.

[0062] For example, the housing 11 may have a mounting space 112, and the mounting space 112 may form a first opening 113 and a second opening 114 on opposite sides of the housing 11. The first opening 113 and the second opening 114 are arranged axially along the motor 10. A first magnetic yoke 12 may be mounted at the first opening 113 and connected to the housing 11. The first magnetic yoke 12 may have a first through hole 121, and a plurality of first claw poles 14 may be mounted on the first magnetic yoke 12, with the plurality of first claw poles 14 spaced circumferentially along the first opening 113.

[0063] The first claw pole 14 can be located within the first through hole 121 to avoid creating a directly connected magnetic flux path between two adjacent first claw poles 14, which would affect the normal operation of the motor 10.

[0064] The first magnetic yoke 12 and the outer shell 11 can be an integral structure to improve the connection strength between the outer shell 11 and the first magnetic yoke 12, which is beneficial to improving the overall structural stability and reducing assembly tolerance.

[0065] The first magnetic yoke 12 can be rectangular to match the rectangular design of the outer shell 11. The four corners of the first magnetic yoke 12 can be rounded to match the rounded corners of the outer shell 11. The thickness of the first magnetic yoke 12 can be uniform, which is beneficial for uniform magnetic flux distribution.

[0066] Please refer to the following: Figure 4A and Figure 4B , Figure 4B yes Figure 4A The diagram shown is a schematic representation of the structure in some embodiments in which the winding 16 is installed.

[0067] In some embodiments, the winding 16 may be disposed between the inner wall of the mounting space 112 and the plurality of first claw poles 14, and may be disposed around the plurality of first claw poles 14. The outer contour of the winding 16 may have a rectangular or rounded rectangular cross-section in the first plane.

[0068] In this embodiment, the space formed between the plurality of first claw poles 14 and the inner wall of the housing 11 is used to house the winding 16, which can improve the installation stability of the winding 16. By designing the outer contour of the winding 16 to have a rectangular or rounded rectangular cross-section on the first plane, the winding size of the winding 16 can be increased, which is beneficial to increasing the current intensity after the winding 16 is energized, thereby improving the output torque of the motor 10.

[0069] For example, the outer contour shape of the winding 16 can be consistent with or approximately consistent with the inner contour shape of the housing 11 to improve the space utilization within the housing 11, increase the winding size of the winding 16, and improve the current intensity after the winding 16 is energized, thereby improving the output torque of the motor 10.

[0070] The outer contour of winding 16 can be a rounded rectangle in cross-section of the first plane, and the outer contour of winding 16 has four second rounded corners 161. The inner contour of outer shell 11 can be a rounded rectangle in cross-section of the first plane, and the inner contour of outer shell 11 has four third rounded corners 115.

[0071] In this embodiment, the rounded corner structure on the outer contour of the winding 16 facilitates the winding preparation of the winding 16. Specifically, compared to a right-angle structure, a rounded corner structure is easier to form during the winding preparation process, which reduces the difficulty of preparing the winding 16. The rounded corner structure on the inner contour of the outer shell 11 can form an assembly space that fits the winding 16, improving space utilization. It can increase the size of the outer shell 11 while installing the winding 16, which is beneficial to increasing the output torque of the motor 10.

[0072] In some examples, the radius of curvature of the second fillet 161 of the outer contour of winding 16 may be smaller than the radius of curvature of the third fillet 115 of the inner contour of housing 11. In other examples, the radius of curvature of the second fillet 161 of the inner contour of winding 16 may be larger than the radius of curvature of the third fillet 115 of the inner contour of housing 11. In still other examples, the radius of curvature of the second fillet 161 of the inner contour of winding 16 may be equal to the radius of curvature of the third fillet 115 of the inner contour of housing 11.

[0073] It should be noted that the relationship between the curvature radii of the second fillet 161 and the third fillet 115 can be adaptively adjusted according to the actual design, as long as it can increase the output torque of the motor 10.

[0074] For example, along the radial direction of the motor 10, there is a gap between the first claw pole 14 and the winding 16 to form an air gap, which facilitates the formation of a magnetic flux path between the first claw pole 14 and the winding 16.

[0075] In some examples, the radial spacing between the first claw pole 14 and the winding 16 along the motor 10 can be equal everywhere to achieve a more uniform magnetic flux distribution between the first claw pole 14 and the winding 16. In other examples, the radial spacing between the first claw pole 14 and the winding 16 along the motor 10 can be unequal in at least some areas, as long as it can increase the output torque of the motor 10.

[0076] The profile of the surface of the first claw pole 14 facing the winding 16 can be, but is not limited to, an ellipse, a circle, or a polygon. Specifically, it can be adaptively adjusted according to the design requirements of the motor 10 so that the first claw pole 14 can improve the output torque of the motor 10.

[0077] Please refer to the following: Figure 4B , Figure 5A and Figure 5B , Figure 5A yes Figure 4B The diagram shown is a schematic representation of the structure in some embodiments in which the rotor 2 is mounted. Figure 5B yes Figure 5A The diagram shows the structure from another perspective.

[0078] In some embodiments, the rotor 2 may be mounted in the mounting space 112 along the axial direction of the motor 10 and pass through the first through hole 121.

[0079] For example, along the radial direction of the motor 10, there is a gap between the first claw pole 14 and the rotor 2 to form an air gap, which facilitates the formation of a magnetic flux path between the first claw pole 14 and the rotor 2.

[0080] In some examples, the radial distance between the first claw pole 14 and the rotor 2 along the motor 10 can be equal everywhere to achieve a more uniform magnetic flux distribution between the first claw pole 14 and the rotor 2. In other examples, the radial distance between the first claw pole 14 and the rotor 2 along the motor can be unequal in at least some areas, as long as it can increase the output torque of the motor 10.

[0081] In some embodiments, the inner contour of the winding 16 may have a non-circular cross-section in the first plane, at least a portion of at least one of the first claw poles 14 may have non-uniform thickness in the radial direction of the motor 10, and / or at least a portion of the plurality of first claw poles 14 may have non-uniform thickness in the radial direction of the motor 10.

[0082] In this embodiment, since the inner contour of the winding 16 can have a non-circular cross-section in the first plane, and the first claw pole 14 adopts a non-uniform thickness design, the upper limit of local magnetic saturation of the first claw pole 14 can be increased, thereby weakening the magnetic flux density saturation of the first claw pole 14, increasing the air gap magnetic flux density, and thus improving the torque output capability of the motor 10. Here, the air gap refers to the area between the first claw pole 14 and the rotor 2.

[0083] It should be noted that, compared to the inner contour of the winding 16 having a circular cross-section in the first plane, this embodiment can provide more space for the first claw pole 14 by changing the shape of the inner contour of the winding 16, thereby increasing the radial dimension of at least a portion of the first claw pole 14 in the motor 10, and thus increasing the upper limit of magnetic saturation of the first claw pole 14 in at least a portion of the region.

[0084] For example, the inner contour of the winding 16 can be a rectangular or rounded rectangle in the cross section of the first plane to provide more space for the first claw pole 14, thereby facilitating the design of the first claw pole 14 with unequal thickness, increasing the local magnetic saturation limit, reducing the magnetic flux density saturation of the first claw pole 14, increasing the air gap magnetic flux density, and thus improving the torque output capability of the motor 10.

[0085] The inner contour of the winding 16 can be a rounded rectangle in the cross section of the first plane. The inner contour of the winding 16 can have four fourth rounded corners 162, which is beneficial to increase the local thickness of the first claw pole 14, thereby increasing the local magnetic saturation upper limit of the first claw pole 14, so as to weaken the magnetic flux density saturation of the first claw pole 14, increase the air gap magnetic flux density, and thus improve the torque output capability of the motor 10.

[0086] The winding 16 may include four straight edges 163 and four curved edges 164, with the curved edges 164 connecting two adjacent straight edges 163. Along the radial direction of the motor 10, the size of the first claw pole 14, which is directly opposite the curved edge 164, is larger than the size of the first claw pole 14, which is directly opposite the straight edge 163.

[0087] It should be noted that, Figure 5B The straight edge 163 and the curved edge 164 are divided by dashed lines.

[0088] In this embodiment, the distance between the arc-shaped edge 164 and the rotor 2 is greater than the distance between the straight edge 163 and the rotor 2, thereby allowing the first claw pole 14, which is directly opposite the arc-shaped edge 164, to have a greater thickness. This increases the upper limit of magnetic saturation of the first claw pole 14, weakens the saturation degree of magnetic flux density of the first claw pole 14, and increases the air gap magnetic flux density, thereby improving the torque output capability of the motor 10.

[0089] In the first claw pole 14, which is positioned directly opposite the straight edge 163, the first claw pole 14 has a minimum radial dimension at the intersection with the second plane, wherein the second plane passes through the center of the motor 10 and is perpendicular to the straight edge 163.

[0090] In this embodiment, since the outer surface of the rotor 2 is arc-shaped and the inner surface of the straight edge 163 is flat, the first claw pole 14, which is directly opposite the straight edge 163, can achieve a non-uniform thickness design. The first claw pole 14 has a minimum radial dimension along the motor 10 at the intersection with the second plane. Other areas of the first claw pole 14 can be provided with a larger thickness dimension, thereby increasing the local magnetic saturation upper limit of the first claw pole 14, weakening the magnetic flux density saturation degree of the first claw pole 14, increasing the air gap magnetic flux density, and thus improving the torque output capability of the motor 10.

[0091] In some other embodiments, the first claw pole 14 may have the same or at least partially different axial dimensions along the motor 10. The specific design can be tailored to the actual application, as long as it can improve the output torque of the motor 10.

[0092] In some other embodiments, the first claw pole 14 may have the same or at least partially different circumferential dimensions along the motor 10. The specific design can be tailored to the actual application, as long as it can increase the output torque of the motor 10.

[0093] Please refer to the following: Figures 6A to 7 , Figure 6A yes Figure 5A The diagram shown illustrates the structure in some embodiments where the second magnetic yoke 13 and the second claw pole 15 are installed. Figure 6B yes Figure 6A The diagram shows the structure after being cut along line BB in some embodiments; Figure 7 yes Figure 6B The diagram shows the structure from another perspective.

[0094] In some embodiments, the second magnetic yoke 13 may be installed at the second opening 114 and connected to the housing 11. The second magnetic yoke 13 may have a second through hole 131, through which the rotor 2 also passes. The motor 10 may further include a plurality of second claw poles 15, all of which are installed on the second magnetic yoke 13. The plurality of second claw poles 15 are arranged at circumferential intervals along the second through hole 131 and are arranged around the rotor 2. The plurality of second claw poles 15 and the plurality of first claw poles 14 are arranged alternately along the circumference of the motor 10.

[0095] In this embodiment, the first claw pole 14 is mounted on the first magnetic yoke 12, and the second claw pole 15 is mounted on the second magnetic yoke 13, so that the first claw pole 14 and the second claw pole 15 can be processed separately before assembly, which helps to reduce the difficulty of manufacturing and assembly. The alternating arrangement of multiple second claw poles 15 and multiple first claw poles 14 along the circumference of the motor 10 helps to improve the uniformity of magnetic flux distribution.

[0096] For example, the second claw pole 15 has a gap between itself and the winding 16 along the radial direction of the motor 10 to form an air gap, which facilitates the formation of a magnetic flux path between the second claw pole 15 and the winding 16.

[0097] In some examples, the radial spacing between the second claw pole 15 and the winding 16 along the motor 10 can be equal everywhere to achieve a more uniform magnetic flux distribution between the second claw pole 15 and the winding 16. In other examples, the radial spacing between the second claw pole 15 and the winding 16 along the motor 10 can be unequal in at least some areas, as long as it can increase the output torque of the motor 10.

[0098] The profile of the surface of the second claw pole 15 facing the winding 16 can be, but is not limited to, an ellipse, a circle, or a polygon. Specifically, it can be adaptively adjusted according to the design requirements of the motor 10 so that the second claw pole 15 can improve the output torque of the motor 10.

[0099] For example, along the radial direction of the motor 10, there is a gap between the second claw pole 15 and the rotor 2 to form an air gap, which facilitates the formation of a magnetic flux path between the second claw pole 15 and the rotor 2.

[0100] In some examples, the radial distance between the second claw pole 15 and the rotor 2 along the motor 10 can be equal everywhere to achieve a more uniform magnetic flux distribution between the second claw pole 15 and the rotor 2. In other examples, the radial distance between the second claw pole 15 and the rotor 2 along the motor can be unequal in at least some areas, as long as it can increase the output torque of the motor 10.

[0101] For example, at least a portion of at least one of the second claw poles 15 has a non-uniform thickness dimension in the radial direction of the motor 10, and / or, at least a portion of the plurality of second claw poles 15 has a non-uniform thickness dimension in the radial direction of the motor 10.

[0102] In this embodiment, since the inner contour of the winding 16 can have a non-circular cross-section in the first plane, and the second claw pole 15 adopts a non-uniform thickness design, the upper limit of local magnetic saturation of the second claw pole 15 can be increased, thereby weakening the magnetic flux density saturation of the second claw pole 15, increasing the air gap magnetic flux density, and thus improving the torque output capability of the motor 10. Here, the air gap refers to the area between the second claw pole 15 and the rotor 2.

[0103] It should be noted that the design of the first claw pole 14 and the second claw pole 15 along the radial dimension of the motor 10 can include various embodiments, as long as it can improve the torque output of the motor 10. For example, in some embodiments, the winding 16 can be designed first, adapting it to the inner wall of the housing 11, and the inner contour of the winding 16 can be designed to be non-circular. Then, the first claw pole 14 and the second claw pole 15 are designed according to the space between the inner contour of the winding 16 and the rotor 2. This ensures the space utilization between the winding 16 and the rotor 2 while improving at least part of the thickness design of the first claw pole 14 and the second claw pole 15, thereby increasing the upper limit of local magnetic saturation of the first claw pole 14 and the second claw pole 15. In other embodiments, the first claw pole 14 and the second claw pole 15 can be designed first. Based on the improvement of the local magnetic saturation upper limit by designing the non-equal thickness of the first claw pole 14 and the second claw pole 15, the winding 16 is designed so that the outer contour shape of the winding 16 is consistent with the inner contour shape of the outer shell 11, and the inner contour of the winding 16 can form a uniform surround of the first claw pole 14 and the second claw pole 15, that is, the distance between each part of the inner contour of the winding 16 and each part of the first claw pole 14 and the second claw pole 15 is the same or approximately the same.

[0104] The second magnetic yoke 13 can be rectangular to match the rectangular design of the outer casing 11. The four corners of the second magnetic yoke 13 can be rounded to match the rounded corners of the outer casing 11. The thickness of the second magnetic yoke 13 can be uniform, which is beneficial for uniform magnetic flux distribution.

[0105] In some other embodiments, the second magnetic yoke 13 may be integral with the outer shell 11 to improve the stability of the connection between the second magnetic yoke 13 and the outer shell 11, thereby improving the overall structural strength.

[0106] In some other embodiments, the second claw pole 15 may have the same or at least partially different axial dimensions along the motor 10. The specific design can be tailored to the actual application, as long as it can improve the output torque of the motor 10.

[0107] In some other embodiments, the second claw pole 15 may have the same or at least partially different circumferential dimensions along the motor 10. The specific design can be tailored to the actual application, as long as it can increase the output torque of the motor 10.

[0108] Please refer to the following: Figure 1 , Figure 2 and Figure 8 , Figure 8 yes Figure 1 A schematic diagram comparing the torque capabilities of the motor 10 and the circular motor 10 provided in the embodiment.

[0109] In some embodiments, the housing 11 of the motor 10 is cylindrical, and the cross-sections of the outer and inner contours of the housing 11 in the first plane are both circular. The cross-sections of the outer and inner contours of the winding 16 in the first plane are also circular. The radial dimensions of the first claw pole 14 and the second claw pole 15 are equal at all points along the motor 10. In this case, the motor 10 in this embodiment can be referred to as a circular motor 10. Figure 1 The motor 10 provided in this embodiment can be referred to as a directional motor 10.

[0110] The circular motor 10 provided in this embodiment is compared with the aforementioned... Figure 1 The square motor 10 provided in the embodiment is used for torque output simulation comparison. Specifically, ensuring that the number of turns of the winding 16 is the same, and with the energizing voltage of the winding 16 being 9V, torque output simulation comparison is performed. The simulation results can be referred to... Figure 8 As shown, it can be seen Figure 1 The torque value of the square motor 10 provided in the embodiment is 6.8% higher than the torque value of the circular motor 10 provided in this embodiment. Therefore, this application... Figure 1The square motor 10 provided in the embodiment can improve the space utilization of the electronic device 100 by changing the shape design of the motor 10, and can also improve the torque output capability of the motor 10 by designing the first claw pole 14 and the second claw pole 15 with non-equal thickness.

[0111] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0112] It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0113] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electric motor (10), characterized in that, include: The housing (11) has an installation space (112) forming a first opening (113) and a second opening (114) on opposite sides of the housing (11). The first opening (113) and the second opening (114) are arranged along the axial direction of the motor (10). The outer contour and inner contour of the housing (11) are both rectangular or rounded rectangles in cross section of a first plane, wherein the first plane is perpendicular to the axial direction of the motor (10). A first magnetic yoke (12) and a second magnetic yoke (13) are respectively installed at the first opening (113) and the second opening (114) and are both connected to the outer shell (11). The first magnetic yoke (12) has a first through hole (121) and the second magnetic yoke (13) has a second through hole (131). The rotor (2) is installed in the mounting space (112) along the axial direction of the motor (10) and passes through the first through hole (121) and the second through hole (131); Multiple first claw poles (14) are mounted on the first magnetic yoke (12). The multiple first claw poles (14) are arranged at circumferential intervals along the first through hole (121) and are arranged around the rotor (2). At least a portion of at least one of the first claw poles (14) has a non-uniform thickness dimension in the radial direction of the motor (10), and / or, at least a portion of the multiple first claw poles (14) has a non-uniform thickness dimension in the radial direction of the motor (10). The winding (16) is disposed between the inner wall of the mounting space (112) and the plurality of first claw poles (14), and is arranged around the plurality of first claw poles (14). The outer contour of the winding (16) has a rectangular or rounded rectangle cross section in the first plane, and the inner contour of the winding (16) has a non-circular cross section in the first plane.

2. The motor (10) as described in claim 1, characterized in that, The inner contour of the winding (16) has a rectangular or rounded rectangle cross-section in the first plane.

3. The motor (10) as described in claim 2, characterized in that, The inner contour of the winding (16) has a rounded rectangle in cross section of the first plane, and the inner contour of the winding (16) has four fourth rounded corners (162).

4. The motor (10) as described in claim 3, characterized in that, The winding (16) includes four straight edges (163) and four curved edges (164), wherein the curved edges (164) connect two adjacent straight edges (163); Along the radial direction of the motor (10), the size of the first claw pole (14) that is directly opposite the arc-shaped side (164) is larger than the size of the first claw pole (14) that is directly opposite the straight side (163).

5. The motor (10) as described in claim 4, characterized in that, In the first claw pole (14) which is positioned directly opposite the straight edge (163), the first claw pole (14) has a minimum radial dimension along the motor (10) at the intersection with the second plane, wherein the second plane passes through the center of the motor (10) and is perpendicular to the straight edge (163).

6. The motor (10) as described in any one of claims 1 to 5, characterized in that, A portion of the first claw pole (14) is located within the first through hole (121).

7. The motor (10) as described in any one of claims 1 to 6, characterized in that, The outline of the surface of the first claw pole (14) facing the winding (16) is elliptical, circular, or polygonal.

8. The motor (10) as described in any one of claims 1 to 7, characterized in that, The motor (10) also includes a plurality of second claw poles (15), which are all mounted on the second magnetic yoke (13). The plurality of second claw poles (15) are arranged at circumferential intervals along the second through hole (131) and are arranged around the rotor (2). Multiple second claw poles (15) and multiple first claw poles (14) are arranged alternately along the circumference of the motor (10).

9. The motor (10) as described in claim 8, characterized in that, At least a portion of at least one of the second claw poles (15) has a non-uniform thickness dimension in the radial direction of the motor (10), and / or at least a portion of the plurality of second claw poles (15) has a non-uniform thickness dimension in the radial direction of the motor (10).

10. The motor (10) as described in any one of claims 1 to 9, characterized in that, The outer contour of the winding (16) is a rounded rectangle in the cross section of the first plane, and the outer contour of the winding (16) has four second rounded corners (161). The inner contour of the outer shell (11) has a rounded rectangle in cross section of the first plane, and the inner contour of the outer shell (11) has four third rounded corners (115).

11. The motor (10) as claimed in any one of claims 1 to 10, characterized in that, The outer contour of the outer shell (11) is a rounded rectangle in the cross section of the first plane, and the outer contour of the outer shell (11) has four first rounded corners (111).

12. The motor (10) as claimed in any one of claims 1 to 11, characterized in that, The first magnetic yoke (12) and the outer shell (11) are integral structures, or the second magnetic yoke (13) and the outer shell (11) are integral structures.

13. The motor (10) as claimed in any one of claims 1 to 12, characterized in that, The motor (10) includes multiple sets of stators (1), each set of stators (1) includes the housing (11), the first magnetic yoke (12), the second magnetic yoke (13), multiple first claw poles (14) and the winding (16); Multiple sets of the stators (1) are arranged along the axial direction of the motor (10), and the rotor (2) passes through multiple sets of the stators (1).

14. An electronic device, characterized in that, Includes the motor (10) as described in any one of claims 1 to 13.

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