Motors and electrical equipment

Abstract

The present invention provides a motor and electrical equipment, wherein the motor includes a rotor structure and a stator structure, wherein the stator structure includes: a stator yoke; at least two stator teeth disposed on the stator yoke, with a notch between the tooth tops of two adjacent stator teeth; wherein at least some of the stator teeth include at least two auxiliary teeth, with a groove between two adjacent auxiliary teeth on the same stator tooth, and the width of the groove unequal to the width of the notch in the circumferential direction of the stator structure. The stator structure provided by the present invention sets the size of the groove between two auxiliary teeth to be unequal to the size of the notch between two adjacent stator teeth, thereby changing the uniformity of the circumferential distribution of the auxiliary teeth on all stator teeth, reducing the number of periods of air gap permeance, increasing the harmonic components of magnetic flux density, and further improving the output torque of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a motor and electrical equipment. Background Art

[0002] In the related art, how to reduce the number of periods of the air gap magnetic permeability between the stator structure and the rotor structure during the operation of the motor, increase the harmonic component of the magnetic density, and thus improve the output torque of the motor has become an urgent problem to be solved. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, a first aspect of the present invention provides a stator structure.

[0005] A second aspect of the present invention provides an electric motor.

[0006] A third aspect of the present invention provides an electrical device.

[0007] A first aspect of the present invention provides a stator structure comprising: a stator yoke; at least two stator teeth, arranged on the stator yoke, with a notch between the tooth tops of two adjacent stator teeth; wherein at least part of the stator teeth include at least two auxiliary teeth, with a groove between two adjacent auxiliary teeth on the same stator tooth, and in the circumferential direction of the stator structure, the width of the groove is not equal to the width of the slot.

[0008] The stator structure proposed in the present invention includes a stator yoke and at least two stator teeth arranged on the stator yoke. Specifically, a notch is provided between the tooth tops of two adjacent stator teeth.

[0009] Furthermore, at least two auxiliary teeth are provided on at least some of the stator teeth, with a groove between adjacent auxiliary teeth on the same stator tooth. The provision of at least two auxiliary teeth allows the at least two auxiliary teeth to function as magnetic conduction components, while also functioning as modulation components to achieve magnetic field modulation. This introduces a greater number of harmonic components into the air gap permeance, significantly improving motor performance.

[0010] Furthermore, in the circumferential direction of the stator structure, the width of the groove is unequal to the width of the slot opening. Specifically, in the circumferential direction of the stator structure, the width of the groove can be set to be unequal to the width of the slot opening. By setting the sizes of the groove and the slot opening to be unequal, the uniformity of the circumferential distribution of the auxiliary teeth on all stator teeth can be changed, reducing the number of periods of the air gap magnetic permeance. By reducing the number of periods of the air gap magnetic permeance, the harmonic components of the magnetic flux density generated by modulation will increase, thereby generating more operating harmonics, further improving the output torque of the motor.

[0011] The stator structure provided by the present invention can change the uniformity of the circumferential distribution of the auxiliary teeth on all stator teeth by arranging at least two auxiliary teeth on at least part of the stator teeth and setting the size of the groove between two adjacent auxiliary teeth to be unequal to the size of the notch between two adjacent stator teeth, thereby reducing the number of periods of the air gap magnetic permeance. By reducing the number of periods of the air gap magnetic permeance, the harmonic component of the magnetic flux density generated by modulation will increase, thereby generating more working harmonics, thereby further improving the output torque of the motor.

[0012] The stator structure provided by the present invention may also have the following additional technical features:

[0013] In the above technical solution, further, at least two stator teeth include: at least two first stator teeth, any first stator tooth includes a first tooth body and a first tooth shoe, one end of the first tooth body is connected to the stator yoke, and the first tooth shoe is connected to the other end of the first tooth body, at least two auxiliary teeth are arranged on the first tooth shoe, and the slot is located between two adjacent first tooth shoes.

[0014] In this technical solution, at least two stator teeth may include at least two first stator teeth, wherein the first stator tooth includes a first tooth body and a first tooth shoe, one end of the first tooth body is connected to the stator yoke, and the first tooth shoe is connected to the other end of the first tooth body, and at least two auxiliary teeth are arranged at the end of the first tooth shoe away from the first tooth body to achieve the arrangement of the auxiliary teeth. That is, auxiliary teeth are arranged on all stator teeth, and further, a notch is formed between two adjacent first tooth shoes, and the width of the notch is set to be unequal to the width of the groove between two adjacent auxiliary teeth on the same first stator tooth, thereby ensuring the uniformity of the magnetic field distributed in the stator structure and the rotor structure during the operation of the motor, and also ensuring the uniformity of the air gap magnetic flux, thereby reducing the torque fluctuation during the operation of the motor and ensuring the stable operation of the motor.

[0015] In any of the above technical solutions, further, on the same first stator tooth, an angle β is formed between the tooth body bisectors of two adjacent auxiliary teeth, and satisfies 1≤β / (2π / (a×x))<1.4, where a represents the number of first stator teeth, and x represents the number of auxiliary teeth on each first stator tooth.

[0016] In this technical solution, the angle β formed between the tooth body bisector of one auxiliary tooth and the tooth body bisector of the other auxiliary tooth between two adjacent auxiliary teeth satisfies 1≤β / (2π / (a×x))<1.4, where a represents the number of first stator teeth and x represents the number of auxiliary teeth on each stator tooth. This further optimizes the structure and distribution of the auxiliary teeth, resulting in larger harmonic amplitudes and higher torque generated by motor modulation, further improving motor efficiency.

[0017] Specifically, the auxiliary teeth may include only two teeth disposed at both ends of the first tooth shoe, and the number of stator teeth may be six. Accordingly, the angle β between the tooth body bisector of one auxiliary tooth and the tooth body bisector of another auxiliary tooth satisfies 1≤β / (2π / (6×2))<1.4. This allows the motor modulation using this stator structure 100 to generate a larger harmonic amplitude and higher torque, further improving the motor's operating efficiency.

[0018] In any of the above technical solutions, further, at least two stator teeth include: at least two first stator teeth, any first stator tooth includes a first tooth body and a first tooth shoe, one end of the first tooth body is connected to the stator yoke, the first tooth shoe is connected to the other end of the first tooth body, and at least two auxiliary teeth are arranged on the first tooth shoe; at least two second stator teeth are respectively arranged between two adjacent first stator teeth, any second stator tooth includes a second tooth body and a second tooth shoe, one end of the second tooth body is connected to the stator yoke, the second tooth shoe is connected to the other end of the second tooth body, and the slot is located between the adjacent first tooth shoes and the second tooth shoes.

[0019] In this technical solution, the at least two stator teeth may include at least two first stator teeth and at least two second stator teeth, wherein each first stator tooth includes a first tooth body and a first tooth shoe, one end of the first tooth body is connected to the stator yoke, and the first tooth shoe is connected to the other end of the first tooth body, and at least two auxiliary teeth are provided on an end of the first tooth shoe away from the first tooth body. That is, at least two auxiliary teeth are provided on the first stator tooth.

[0020] Furthermore, at least two second stator teeth are respectively arranged between two adjacent first stator teeth, that is, the first stator teeth and the second stator teeth are arranged alternately. Specifically, the second stator tooth includes a second tooth body and a second tooth shoe, and one end of the second tooth body is connected to the stator yoke. That is, no auxiliary teeth are provided on the second stator tooth. By arranging the second stator tooth between adjacent first stator teeth, the auxiliary teeth on the first tooth shoe of the first stator tooth and the second stator tooth together serve as the magnetic field modulation component of the motor to achieve the function of magnetic field modulation. At this time, the number of motor modulation blocks is further increased, so that the adjustment space of the motor pole slot matching is increased, and more magnetic permeance harmonic components can be introduced compared to conventional permanent magnet magnetic field modulation motors. When the permanent magnet magnetomotive force and the air gap magnetic permeance containing harmonics act, new harmonic components will appear in the air gap magnetic flux density, thereby further improving the output torque of the motor.

[0021] In addition, a slot is formed between the adjacent first tooth shoes and the second tooth shoes, and the width of the slot is not equal to the width of the groove between two adjacent auxiliary teeth located on the same first stator tooth, thereby ensuring the uniformity of the magnetic field distributed in the stator structure and the rotor structure during the operation of the motor, and also ensuring the uniformity of the air gap magnetic density, thereby reducing the torque fluctuation during the operation of the motor and ensuring the stable operation of the motor.

[0022] Furthermore, when the number of pole pairs in the stator structure and the number of pole pairs in the permanent magnets of the rotor structure satisfy the relationship: Pa = |a×(x+1)±Pr|, the new harmonic components appearing in the air gap flux density can serve as the motor's operating harmonics, providing output torque for the motor, thereby effectively improving the motor's torque density. Here, the number of first stator teeth is a, the number of auxiliary teeth on each first stator tooth is x, the number of pole pairs in the stator structure is Pa, and the number of pole pairs in the permanent magnets is Pr.

[0023] In any of the above technical solutions, further, on the same first stator tooth, an angle β is formed between the tooth body bisectors of two adjacent auxiliary teeth, and satisfies 0.5≤β / (2π / (a×x))<1.4, where a represents the number of first stator teeth, and x represents the number of auxiliary teeth on each first stator tooth.

[0024] In this technical solution, at least two stator teeth include at least two first stator teeth and at least two second stator teeth, and at least two auxiliary teeth are provided on the first tooth shoe of the first stator tooth. In two adjacent auxiliary teeth, the angle β formed between the tooth body bisector of one auxiliary tooth and the tooth body bisector of the other auxiliary tooth satisfies 0.5≤β / (2π / (a×x))<1.4; where a represents the number of first stator teeth and x represents the number of auxiliary teeth on each first stator tooth. Thus, the present invention further optimizes the structure and distribution of the auxiliary teeth, resulting in larger harmonic amplitudes and higher torque generated by motor modulation, thereby further improving the motor's operating efficiency.

[0025] In any of the above technical solutions, further, the width of the second tooth body is smaller than the width of the first tooth body; and / or the width of the second tooth shoe is smaller than the width of the first tooth shoe.

[0026] In this technical solution, by setting the width of the second tooth body of the second stator tooth to be smaller than the width of the first tooth body of the first stator tooth, the interaction between the auxiliary tooth on the first tooth shoe of the first stator tooth and the second stator tooth can be further strengthened to enhance the effect of magnetic field modulation, thereby further increasing the number of motor modulation blocks, increasing the adjustment space of the motor pole slot matching, and introducing more magnetic permeability harmonic components compared to conventional permanent magnet magnetic field modulation motors. Further increase the new harmonics appearing in the air gap magnetic flux, thereby further improving the output torque of the motor. In addition, by setting the width of the second tooth body to be smaller than the width of the first tooth body, on the basis of increasing the number of modulation blocks, the area of ​​the winding slot can be occupied as little as possible, thereby not affecting the number of windings placed in the winding slot.

[0027] Furthermore, the width of the second tooth shoe can be set to be smaller than the width of the first tooth shoe, so that the area of ​​the winding slot can be occupied as little as possible while increasing the number of modulation blocks, thereby not affecting the number of windings placed in the winding slot.

[0028] Specifically, the width of the second tooth body can be set to be smaller than the width of the first tooth body, and at the same time, the width of the second tooth shoe can be set to be smaller than the width of the first tooth shoe.

[0029] In any of the above technical solutions, further, the first stator teeth and the stator yoke are detachable.

[0030] In this technical solution, the first tooth body of the first stator tooth and the first tooth shoe can also be set to a detachable connection with the stator yoke, that is, the first tooth body of the first stator tooth and the stator yoke and the first tooth shoe can be set to a detachable sleeve assembly structure. By setting the detachable sleeve assembly structure between the first tooth body, the first tooth shoe and the stator yoke, during the assembly process of the stator structure, the winding can be first wound on the first tooth body of the first stator tooth, and then one end of the first tooth body can be connected to the stator yoke, and finally the first tooth shoe can be installed to the other end of the first tooth body. It also achieves a simplified winding process during the assembly process of the stator structure, reduces the difficulty of winding, improves the slot fill rate of the winding, improves the output performance of the motor, and can reduce scrap and material waste.

[0031] Furthermore, the first tooth body of the first stator tooth and the stator yoke can be connected through a concave-convex structure, that is, a groove or a protrusion is provided at one end of the first tooth body, and correspondingly, a protrusion or groove that matches the groove or protrusion is provided at a corresponding position of the stator yoke, so that the connection between the first tooth body and the stator yoke can be achieved through the cooperation of the groove and the protrusion.

[0032] Correspondingly, the first tooth body and the first tooth shoe can also be connected via a concave-convex structure, that is, the first tooth shoe and the first tooth body are connected via mutually matching protrusions and grooves, so as to simplify the winding process.

[0033] In any of the above technical solutions, further, the second stator teeth are detachably connected to the stator yoke.

[0034] In this technical solution, the second tooth body of the second stator tooth and the stator yoke can also be configured to be detachably connected, that is, the second tooth body of the second stator tooth and the stator yoke can be configured to form a separable sleeve assembly structure. By setting up the separable sleeve assembly structure between the second tooth body and the stator yoke, during the assembly of the stator structure, the coil can be first wound on the first tooth body of the first stator tooth, and then one end of the second tooth body can be connected to the stator yoke. This simplifies the winding process during the assembly of the stator structure, reduces the difficulty of winding, increases the slot fill rate of the winding, improves the output performance of the motor, and at the same time reduces scrap and material waste.

[0035] Specifically, the second tooth body of the second stator tooth can be connected to the stator yoke through a concave-convex structure, that is, a groove or a protrusion is provided at one end of the second tooth body, and correspondingly, a protrusion or groove that matches the groove or protrusion is provided at the corresponding position of the stator yoke, so that the connection between the second tooth body and the stator yoke can be achieved through the cooperation of the groove and the protrusion.

[0036] In any of the above technical solutions, further, in the circumferential direction of the stator structure, the widths of two adjacent notches are equal; and / or in the circumferential direction of the stator structure, the widths of two adjacent grooves are equal.

[0037] In this technical solution, in the circumferential direction of the stator assembly, the widths of two adjacent slots can be set to be equal, that is, multiple stator teeth are evenly distributed along the circumference of the stator yoke, thereby ensuring the rationality of the stator tooth distribution position and further ensuring stable operation of the motor.

[0038] Furthermore, the widths of two adjacent grooves can be set to be equal, that is, on all stator teeth provided with auxiliary teeth, the widths of the grooves between two adjacent auxiliary teeth are equal, thereby simplifying the manufacturing process of the stator structure and improving assembly efficiency.

[0039] Specifically, the widths of two adjacent notches can be set to be equal, and at the same time, the widths of two adjacent grooves can also be set to be equal, so as to ensure stable operation of the motor while simplifying the assembly process of the stator structure.

[0040] In any of the above technical solutions, further, the stator structure also includes a winding, the winding includes a plurality of coils, and each coil is arranged on a first stator tooth.

[0041] In this technical solution, the stator structure also includes a winding, which includes multiple coils. The coil is wound on the tooth body of the first stator tooth to ensure the output torque during operation of the motor using this stator structure. In addition, by winding each coil only on the tooth body of one first stator tooth, that is, adopting a concentrated winding structure with single tooth winding, the motor winding end is smaller, which is conducive to reducing copper loss, facilitating modularization, and improving production efficiency. Since no winding is wound on the second tooth body of the second stator tooth, the winding of each phase can be physically isolated, reducing the mutual inductance between phases, thereby improving the reliability of the motor operation.

[0042] In any of the above technical solutions, further, in the axial direction of the stator structure, the cross-section of the groove may be in the shape of a polygon or an arc.

[0043] In this technical solution, in the axial direction of the stator structure, the shape of the cross section of the groove can be set to square, triangular or circular according to requirements.

[0044] According to a second aspect of the present invention, a motor is proposed, comprising: a rotor structure; and a stator structure as described in any one of the above technical solutions.

[0045] The motor provided by the present invention comprises a rotor structure and the stator structure of any of the above-described technical solutions, wherein at least a portion of the stator structure is located within the rotor structure. Specifically, the stator structure and the rotor structure are arranged concentrically to ensure that the rotor structure can rotate relative to the stator structure to achieve power output of the motor. While the stator structure may be partially located within the rotor structure, the entire stator structure in the axial direction may also be disposed within the rotor structure to achieve different coordination arrangements between the permanent magnets of the rotor structure and the windings of the stator structure.

[0046] Furthermore, the motor provided by the present invention includes the stator structure according to the first aspect of the present invention. Therefore, all the beneficial effects of the above stator structure are achieved and will not be discussed in detail here.

[0047] In the above technical solution, further, the rotor structure includes: a rotor core, which is sleeved on the outside of the stator structure; and a permanent magnet, which is arranged on the rotor core.

[0048] In this technical solution, the rotor structure further includes a rotor core and permanent magnets, wherein the permanent magnets are arranged on the rotor core and form a plurality of permanent magnetic poles.

[0049] Specifically, when at least a portion of the rotor structure is located inside the stator structure, the permanent magnets can be placed on the outer surface of the rotor core, or placed inside the rotor core, such as a V-shaped or spoke-shaped magnet arrangement.

[0050] Specifically, when at least a portion of the stator structure is located within the rotor structure, the permanent magnets are retained on the inner surface of the rotor core. The permanent magnet poles can be composed of a plurality of permanent magnets having two lateral edges and substantially arc-shaped inner and outer surfaces, or can be an integrally formed magnetic ring. Alternatively, the permanent magnet material can be ferrite, plastic magnet, rare earth permanent magnet, or rubber magnetic strip.

[0051] In any of the above technical solutions, further, there are multiple permanent magnets, and the polarities of adjacent permanent magnets are arranged in opposite directions.

[0052] In this technical solution, the number of permanent magnets can include multiple permanent magnets, which are arranged in sequence on the rotor core and have opposite polarity directions. Specifically, the permanent magnets can include multiple arc-shaped permanent magnets, which are distributed in a circular shape, and the polarity of two adjacent arc-shaped permanent magnets is opposite.

[0053] Specifically, the permanent magnet includes a plurality of arc-shaped permanent magnets. The plurality of arc-shaped permanent magnets are distributed in a circular ring shape, and the polarities of two adjacent arc-shaped permanent magnets are different. Specifically, each arc-shaped permanent magnet has 1, 2, or 4 magnetic poles, and the polarities of adjacent magnetic poles are alternately different.

[0054] In any of the above technical solutions, further, the permanent magnet includes an annular permanent magnet, and the annular permanent magnet is sleeved on the outside of the stator structure.

[0055] In this technical solution, the permanent magnet can be configured as an integrated annular permanent magnet, which is sleeved onto the outer wall of the stator structure. Specifically, when the annular permanent magnet has multiple magnetic poles, the number of permanent magnets can be reduced, the permanent magnet installation process time can be shortened, and manufacturing and assembly efficiency can be improved. Furthermore, when the magnetic pole width is small, using a single annular permanent magnet to fill multiple poles can increase the width of the annular permanent magnet, reducing the difficulty of processing the annular permanent magnet.

[0056] In any of the above technical solutions, further, at least two auxiliary teeth are provided on the first stator tooth in the stator teeth, the number of the first stator teeth is a, the number of auxiliary teeth on each stator tooth is x, the number of pole pairs of the stator structure is Pa, and the number of pole pairs of the permanent magnet is Pr.

[0057] When the stator teeth include the first stator tooth, Pa=|a×x±Pr| is satisfied; or

[0058] In a case where the stator teeth include the first stator teeth and the second stator teeth, Pa=|a×(x+1)±Pr| is satisfied.

[0059] In this technical solution, by limiting the number of stator winding pole pairs, the new harmonic components appearing in the air gap magnetic density can be used as the working harmonics of the motor, providing output torque for the motor, thereby effectively improving the torque density of the motor.

[0060] According to a third aspect of the present invention, an electrical device is provided, comprising a motor according to any one of the above technical solutions.

[0061] The electrical equipment provided by the present invention includes the motor of any one of the above technical solutions and thus has all the beneficial effects of the motor, which will not be described in detail here.

[0062] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0064] Figure 1 A schematic structural diagram of a stator structure provided by an embodiment of the present invention is shown;

[0065] Figure 2 A schematic structural diagram of a stator structure provided by another embodiment of the present invention is shown;

[0066] Figure 3 A schematic structural diagram of a stator structure provided by another embodiment of the present invention is shown;

[0067] Figure 4 A schematic structural diagram of a stator structure provided by another embodiment of the present invention is shown;

[0068] Figure 5 A schematic structural diagram of a motor provided by an embodiment of the present invention is shown;

[0069] Figure 6 Shown Figure 5 Schematic diagram of the rotor structure in the motor;

[0070] Figure 7 A schematic structural diagram of a permanent magnet in a motor according to an embodiment of the present invention is shown;

[0071] Figure 8 A schematic structural diagram of a permanent magnet in a motor according to another embodiment of the present invention is shown;

[0072] Figure 9 A schematic structural diagram of a permanent magnet in a motor according to another embodiment of the present invention is shown;

[0073] Figure 10A schematic diagram showing changes in the air gap magnetic flux harmonic order distribution during operation of a motor according to an embodiment of the present invention compared to the related art;

[0074] Figure 11 A schematic diagram showing changes in the no-load back EMF effective value during operation of a motor according to an embodiment of the present invention compared to the related art;

[0075] Figure 12 A schematic diagram showing changes in motor efficiency during operation of a motor according to an embodiment of the present invention compared with related art is shown.

[0076] in, Figures 1 to 9 The corresponding relationship between the reference numerals and components in FIG. 1 is as follows:

[0077] 100 stator structure, 102 stator yoke, 104 first stator tooth, 106 first tooth body, 108 first tooth shoe, 110 auxiliary tooth, 112 second stator tooth, 114 second tooth body, 116 second tooth shoe, 118 stator tooth, 120 slot, 122 groove, 200 motor, 202 rotor structure, 204 rotor core, 206 permanent magnet. DETAILED DESCRIPTION

[0078] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0079] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0080] Refer to the following Figures 1 to 12 To describe the stator structure, motor and electrical equipment provided according to some embodiments of the present invention.

[0081] The present invention proposes a first aspect, such as Figure 1 and Figure 2 A stator structure 100 is proposed, comprising a stator yoke 102 and at least two stator teeth 118 arranged on the stator yoke 102, wherein a notch 120 is provided between the tooth tops of two adjacent stator teeth 118 arranged on the stator yoke; wherein at least some of the stator teeth 118 include at least two auxiliary teeth 110, and a groove 122 is provided between two adjacent auxiliary teeth 110 on the same stator tooth 118, and in the circumferential direction of the stator structure 100, the width of the groove 122 is not equal to the width of the notch 120.

[0082] The stator structure 100 proposed in the present invention includes a stator yoke 102 and at least two stator teeth 118 disposed on the stator yoke 102 . Specifically, a notch 120 is defined between the tooth tops of two adjacent stator teeth 118 .

[0083] Furthermore, at least two auxiliary teeth 110 are provided on at least some of the stator teeth 118. The provision of at least two auxiliary teeth 110 allows the at least two auxiliary teeth 110 to function as magnetic conductive components, both for magnetic conduction and for modulation, to achieve magnetic field modulation. This introduces more harmonic components into the air gap magnetic permeance, significantly improving motor performance.

[0084] Furthermore, in the circumferential direction of the stator structure 100, the width of the groove 122 is not equal to the width of the slot 120. Specifically, in the circumferential direction of the stator structure 100, the width of the groove 122 can be set to be unequal to the width of the slot 120. By setting the sizes of the groove 122 and the slot 120 to be unequal, the uniformity of the circumferential distribution of the auxiliary teeth 110 on all stator teeth 118 can be changed, and the number of periods of the air gap permeance can be reduced. By reducing the number of periods of the air gap permeance, the harmonic components of the magnetic flux density generated by the modulation will increase. Specifically, Figure 10 As shown, Figure 10 H1 represents the distribution of the harmonic order of the air gap magnetic density when the size of the groove 122 is equal to that of the notch 120, which is mainly distributed as 2, 10, 14, 22, 26, etc. Figure 10 H2 represents the distribution of the harmonic order of the air gap magnetic density when the sizes of the groove 122 and the notch 120 are not equal. Figure 10 It can be seen that by setting the sizes of the groove 122 and the notch 120 to be unequal, the number of air gap magnetic permeability periods is reduced to 6, and the number of air gap magnetic density harmonic periods is increased by 4, 8, 16, 28, etc., thereby generating more working harmonics, thereby further improving the motor output torque.

[0085] Furthermore, if Figure 11 and Figure 12 As shown, by setting the sizes of the groove 122 and the notch 120 to be different, the no-load back electromotive force during the operation of the motor is further improved, and the motor efficiency is further increased. Figure 11 In the figure, H3 indicates that when the size of the groove 122 is equal to that of the notch 120, the effective value of the no-load back EMF of the motor is 96.84, and H4 indicates that when the size of the groove 122 is unequal to that of the notch 120, the effective value of the no-load back EMF of the motor is 116.11. It can be seen that the effective value of the no-load back EMF is significantly improved. Figure 12In the figure, H5 indicates that when the sizes of the groove 122 and the notch 120 are equal, the efficiency of the motor is 82.38%, and H6 indicates that when the sizes of the groove 122 and the notch 120 are set to be unequal, the efficiency of the motor is 84.40%. It can be seen that by setting the sizes of the groove 122 and the notch 120 to be unequal, the efficiency of the motor is significantly improved.

[0086] The stator structure 100 provided by the present invention can change the uniformity of the circumferential distribution of the auxiliary teeth 110 on all stator teeth 118 by providing at least two auxiliary teeth 110 on the tooth shoes of at least part of the stator teeth 118, and setting the size of the groove 122 between two adjacent auxiliary teeth 110 and the size of the notch 120 between two adjacent first tooth shoes 108 to be unequal, thereby reducing the number of periods of the air gap magnetic permeance. By reducing the number of periods of the air gap magnetic permeance, the harmonic component of the magnetic flux density generated by modulation will increase, thereby generating more operating harmonics, thereby further improving the output torque of the motor.

[0087] In the above embodiment, further, Figure 1 As shown, at least two stator teeth 118 include: at least two first stator teeth 104, any first stator tooth 104 includes a first tooth body 106 and a first tooth shoe 108, one end of the first tooth body 106 is connected to the stator yoke, and the first tooth shoe 108 is connected to the other end of the first tooth body 106, at least two auxiliary teeth 110 are arranged on the first tooth shoe 108, and the slot 120 is located between two adjacent first tooth shoes 108.

[0088] Specifically, the at least two stator teeth 118 may include at least two first stator teeth 104, wherein the first stator tooth 104 includes a first tooth body 106 and a first tooth shoe 108, one end of the first tooth body 106 is connected to the stator yoke, and the first tooth shoe 108 is connected to the other end of the first tooth body 106, and then at least two auxiliary teeth 110 are arranged at the end of the first tooth shoe 108 away from the first tooth body 106 to realize the setting of the auxiliary teeth 110. That is, auxiliary teeth 110 are provided on all stator teeth 118. Furthermore, a slot 120 is formed between two adjacent first tooth shoes 108, and the width of the slot 120 is set to be unequal to the width of the groove 122 between two adjacent auxiliary teeth 110 on the same first stator tooth 104, thereby ensuring the uniformity of the magnetic field distributed in the stator structure 100 and the rotor structure 202 during the operation of the motor, and also ensuring the uniformity of the air gap magnetic density, thereby reducing the torque fluctuation during the operation of the motor and ensuring the stable operation of the motor.

[0089] Furthermore, if Figure 3As shown, on the same first stator tooth 104 , an angle β is formed between the tooth body bisectors of two adjacent auxiliary teeth, and satisfies 1≤β / (2π / (a×x))<1.4, where a represents the number of first stator teeth 104 , and x represents the number of auxiliary teeth 110 on each first stator tooth 104 .

[0090] Specifically, between two adjacent auxiliary teeth, the angle β formed between the tooth bisector L3 of one auxiliary tooth and the tooth bisector L4 of the other auxiliary tooth satisfies the condition 1≤β / (2π / (a×x))<1.4, where a represents the number of stator teeth and x represents the number of auxiliary teeth per stator tooth. This further optimizes the structure and distribution of the auxiliary teeth, resulting in larger harmonic amplitudes and higher torque generated by motor modulation, further improving motor efficiency.

[0091] Specifically, the auxiliary teeth may include only two teeth disposed at both ends of the first tooth shoe, and the number of stator teeth may be six. Accordingly, the angle β between the tooth body bisector L3 of one auxiliary tooth and the tooth body bisector L4 of another auxiliary tooth satisfies 1≤β / (2π / (6×2))<1.4. This allows the motor modulation using this stator structure 100 to generate a larger harmonic amplitude and higher torque, further improving the motor's operating efficiency.

[0092] In any of the above embodiments, further, Figure 1 As shown, at least two stator teeth 118 include: at least two first stator teeth 104, any first stator tooth 104 includes a first tooth body 106 and a first tooth shoe 108, one end of the first tooth body 106 is connected to the stator yoke, the first tooth shoe 108 is connected to the other end of the first tooth body 106, and at least two auxiliary teeth 110 are arranged on the first tooth shoe 108; at least two second stator teeth 112, respectively arranged between two adjacent first stator teeth 104, any second stator tooth 112 includes a second tooth body 114 and a second tooth shoe 116, one end of the second tooth body 114 is connected to the stator yoke, the second tooth shoe 116 is connected to the other end of the second tooth body 114, and the slot 120 is located between the adjacent first tooth shoes 108 and second tooth shoes 116.

[0093] In this embodiment, the at least two stator teeth 118 may include at least two first stator teeth 104 and at least two second stator teeth 112, wherein each first stator tooth 104 includes a first tooth body 106 and a first tooth shoe 108, one end of the first tooth body 106 is connected to the stator yoke, and the first tooth shoe 108 is connected to the other end of the first tooth body 106, and at least two auxiliary teeth 110 are provided on an end of the first tooth shoe 108 away from the first tooth body 106. That is, at least two auxiliary teeth 110 are provided on the first stator tooth 104.

[0094] Furthermore, at least two second stator teeth 112 are disposed between two adjacent first stator teeth 104, respectively, meaning that the first stator teeth 104 and the second stator teeth 112 are arranged alternately. Specifically, the second stator tooth 112 includes a second tooth body 114 and a second tooth shoe 116, with one end of the second tooth body 114 connected to the stator yoke. That is, no auxiliary teeth 110 are provided on the second stator teeth 112. By disposing the second stator teeth 112 between adjacent first stator teeth 104, the auxiliary teeth 110 and the second stator teeth 112 on the first tooth shoes 108 of the first stator teeth 104 function together as the motor's magnetic field modulation components, achieving magnetic field modulation. This further increases the number of motor modulation blocks, increasing the adjustment space for the motor's pole-slot matching and enabling the introduction of more permeance harmonic components compared to conventional permanent magnet field modulation motors. When the permanent magnet magnetomotive force interacts with the harmonic air gap permeance, new harmonic components appear in the air gap flux density, further increasing the motor's output torque.

[0095] In addition, a slot 120 is formed between the adjacent first tooth shoes 108 and the second tooth shoes 116. The width of the slot 120 is not equal to the width of the groove 122 between two adjacent auxiliary teeth 110 located on the same first stator tooth 104, thereby ensuring the uniformity of the magnetic field distributed in the stator structure 100 and the rotor structure 202 during the operation of the motor, and also ensuring the uniformity of the air gap magnetic density, thereby reducing the torque fluctuation during the operation of the motor and ensuring the stable operation of the motor.

[0096] Furthermore, when the number of pole pairs of the stator structure 100 and the number of pole pairs of the permanent magnets 206 of the rotor structure 202 satisfy the relationship: Pa = |a×(x+1)±Pr|, the new harmonic components appearing in the air gap flux density can serve as the operating harmonics of the motor, providing output torque for the motor, thereby effectively improving the torque density of the motor. Here, the number of first stator teeth 104 is a, the number of auxiliary teeth 110 on each first stator tooth 104 is x, the number of pole pairs of the stator structure 100 is Pa, and the number of pole pairs of the permanent magnets is Pr.

[0097] Further, such as Figure 1 As shown, on the same first stator tooth 104 , an angle β is formed between the tooth body bisectors of two adjacent auxiliary teeth 110 , and satisfies 0.5≤β / (2π / (a×x))<1.4, where a represents the number of first stator teeth 104 , and x represents the number of auxiliary teeth on each first stator tooth 104 .

[0098] Specifically, at least two stator teeth include at least two first stator teeth and at least two second stator teeth, and at least two auxiliary teeth are provided on the first tooth shoe of the first stator tooth. In two adjacent auxiliary teeth, the angle β formed between the tooth body bisector L1 of one auxiliary tooth and the tooth body bisector L2 of the other auxiliary tooth satisfies 0.5≤β / (2π / (a×x))<1.4; where a represents the number of stator teeth and x represents the number of auxiliary teeth on each stator tooth. Thus, the present invention further optimizes the structure and distribution of the auxiliary teeth, resulting in larger harmonic amplitudes and higher torque generated by motor modulation, thereby further improving the motor's operating efficiency.

[0099] In any of the above embodiments, further, Figure 1 and Figure 2 As shown, the width of the second tooth body 114 is smaller than the width of the first tooth body 106 ; and / or the width of the second tooth shoe 116 is smaller than the width of the first tooth shoe 108 .

[0100] In this embodiment, by setting the width of the second tooth body 114 of the second stator tooth 112 to be smaller than the width of the first tooth body 106 of the first stator tooth 104, the interaction between the auxiliary tooth 110 on the first tooth shoe 108 of the first stator tooth 104 and the second stator tooth 112 can be further strengthened to enhance the effect of magnetic field modulation, thereby further increasing the number of motor modulation blocks, increasing the adjustment space of the motor pole slot matching, and introducing more magnetic permeance harmonic components compared to conventional permanent magnet magnetic field modulation motors. Further increase the new harmonics appearing in the air gap magnetic flux, thereby further improving the output torque of the motor. In addition, by setting the width of the second tooth body 114 to be smaller than the width of the first tooth body 106, on the basis of increasing the number of modulation blocks, the area of ​​the winding slot can be occupied as little as possible, thereby not affecting the number of windings placed in the winding slot.

[0101] Furthermore, the width of the second tooth shoe 116 can be set to be smaller than the width of the first tooth shoe 108, so that the area of ​​the winding slot can be occupied as little as possible while increasing the number of modulation blocks, thereby not affecting the number of windings placed in the winding slot.

[0102] Specifically, the width of the second tooth body 114 may be set to be smaller than the width of the first tooth body 106 , and at the same time, the width of the second tooth shoe 116 may be set to be smaller than the width of the first tooth shoe 108 .

[0103] Furthermore, if Figure 3 As shown, the first stator tooth 104 is detachable from the stator yoke.

[0104] Specifically, the first tooth body 106 and the first tooth shoe 108 of the first stator tooth 104 can also be provided with a detachable connection with the stator yoke, that is, the first tooth body 106 of the first stator tooth 104, the stator yoke, and the first tooth shoe 108 can be provided with a separable sleeve assembly structure. By providing the separable sleeve assembly structure between the first tooth body 106, the first tooth shoe 108, and the stator yoke, during the assembly process of the stator structure 100, the winding can be first wound on the first tooth body 106 of the first stator tooth 104, then one end of the first tooth body 106 can be connected to the stator yoke, and finally the first tooth shoe 108 can be installed to the other end of the first tooth body 106. This also simplifies the winding process during the assembly process of the stator structure 100, reduces the difficulty of winding, improves the slot fill rate of the winding, improves the output performance of the motor, and can also reduce scrap and material waste.

[0105] Furthermore, the first tooth body 106 of the first stator tooth 104 can be connected to the stator yoke through a concave-convex structure, that is, a groove or a protrusion is provided at one end of the first tooth body 106, and correspondingly, a protrusion or groove that matches the groove or protrusion is provided at the corresponding position of the stator yoke, so that the connection between the first tooth body 106 and the stator yoke can be achieved through the cooperation of the groove and the protrusion.

[0106] Accordingly, if Figure 4 As shown, the first tooth body 106 and the first tooth shoe 108 can also be connected by a concave-convex structure, that is, the first tooth shoe 108 and the first tooth body 106 are connected by mutually matching protrusions and grooves to simplify the winding process.

[0107] In any of the above embodiments, further, Figure 2 As shown, the second stator tooth 112 is detachably connected to the stator yoke 102 .

[0108] In this embodiment, the second tooth body 114 of the second stator tooth 112 and the stator yoke 102 can also be configured to be detachably connected, that is, the second tooth body 114 of the second stator tooth 112 and the stator yoke 102 can be configured to form a detachable sleeve assembly structure. By providing a detachable sleeve assembly structure between the second tooth body 114 and the stator yoke 102, during the assembly process of the stator structure 100, the winding can be first wound on the first tooth body 106 of the first stator tooth 104, and then one end of the second tooth body 114 can be connected to the stator yoke 102. This simplifies the winding process during the assembly process of the stator structure 100, reduces the difficulty of winding, improves the slot fill rate of the winding, improves the output performance of the motor, and at the same time reduces scrap and material waste.

[0109] Specifically, the second tooth body 114 of the second stator tooth 112 can be connected to the stator yoke 102 through a concave-convex structure, that is, a groove or a protrusion is provided at one end of the second tooth body 114, and correspondingly, a protrusion or groove that matches the groove or protrusion is provided at the corresponding position of the stator yoke 102, so that the connection between the second tooth body 114 and the stator yoke 102 can be achieved through the cooperation of the groove and the protrusion.

[0110] Furthermore, the stator structure 100 includes at least two stacks, each stack includes a yoke segment and a first stator tooth 104, the first stator tooth 104 is arranged on the yoke segment, the yoke segments of two adjacent stacks are connected, and the stator yoke 102 includes multiple yoke segments.

[0111] Specifically, the stator structure 100 comprises at least two stacks, which are stacked together to form the stator structure 100. This allows workers to perform winding and other operations on a single stack during the manufacturing process. Compared to related techniques that require winding on a single core, the stack proposed in the present invention provides a larger operating space, which helps reduce winding difficulty, thereby improving winding efficiency and reducing material costs.

[0112] Furthermore, the present invention allows winding and other operations to be performed initially on a single stack, effectively increasing the number of windings and the slot fill rate of the windings, thereby improving the output performance of the motor using the stator structure 100. Furthermore, while reducing the winding difficulty, the present invention can also reduce the scrap rate during the winding process, thereby reducing waste and improving the cost of the stator structure 100. Furthermore, the lower material requirements of a single stack can improve the utilization rate of the core material, thereby reducing the material cost of the stator structure 100.

[0113] Furthermore, the yoke sections of two adjacent stacked bodies are detachably connected; the stator structure 100 further includes a fixing member, and the two adjacent stacked bodies are fixed by the fixing member.

[0114] Specifically, the yoke sections of two adjacent stacked bodies are detachably connected, thereby ensuring the assembly and disassembly of the two adjacent stacked bodies.

[0115] Specifically, the stator structure 100 may include a first connecting portion and a second connecting portion. The first connecting portion is disposed at the first end of the yoke section, and the second connecting portion is disposed at the second end of the yoke section, with the first end and the second end being disposed relative to each other on the yoke section. Furthermore, the structures of the first connecting portion and the second connecting portion match, and the first connecting portion and the second connecting portion cooperate to achieve self-locking. Therefore, during the process of splicing stacked bodies, the present invention can connect two adjacent stacked bodies via the first connecting portion and the second connecting portion, including a detachable connection between two adjacent stacked bodies.

[0116] Furthermore, one of the first connecting portion and the second connecting portion is a convex portion, and the other is a concave portion. Furthermore, the shape of the convex portion matches the shape of the concave portion, and the convex portion and the concave portion are detachably connected and have a self-locking function. Specifically, the concave portion includes, but is not limited to, a polygonal groove, a circular groove, or an elliptical groove; the shape of the convex portion matches the shape of the concave portion.

[0117] Furthermore, the stator structure 100 further includes a fixing member, and two adjacent stacked bodies are fixed by the fixing member.

[0118] Specifically, after two adjacent stacks are joined, the overall structure is further secured using fixings, thereby further improving the structural stability of the joined stack. Specifically, the fixings can be insulating frames, which not only ensure insulation but also secure the stacks, thus achieving a multi-purpose insulating frame.

[0119] Specifically, two adjacent stacked bodies are connected by welding. After the two adjacent stacked bodies are spliced ​​together, the present invention further fixes the overall structure by welding, thereby further improving the structural stability of the spliced ​​stacked bodies.

[0120] Specifically, two adjacent stacked bodies are integrally injection molded. That is, after the two adjacent stacked bodies are spliced ​​together, the present invention further fixes the overall structure by integral injection molding, thereby further improving the structural stability of the spliced ​​stacked bodies.

[0121] In any of the above embodiments, further, in the circumferential direction of the stator structure 100 , the widths of two adjacent notches 120 are equal; and / or in the circumferential direction of the stator structure 100 , the widths of two adjacent grooves 122 are equal.

[0122] In this embodiment, in the circumferential direction of the stator assembly, the widths of two adjacent slots 120 can be set to be equal, that is, the multiple stator teeth 118 are evenly distributed along the circumference of the stator yoke, thereby ensuring the rationality of the distribution position of the stator teeth 118 and further ensuring stable operation of the motor.

[0123] Furthermore, the widths of two adjacent grooves 122 can be set to be equal, that is, on all stator teeth 118 provided with auxiliary teeth 110, the widths of the grooves 122 between two adjacent auxiliary teeth 110 are equal, thereby simplifying the manufacturing process of the stator structure 100 and improving assembly efficiency.

[0124] Specifically, the widths of two adjacent notches 120 can be set to be equal, and at the same time, the widths of two adjacent grooves 122 can also be set to be equal, so as to ensure stable operation of the motor while simplifying the assembly process of the stator structure 100.

[0125] In any of the above embodiments, the stator structure 100 further includes a winding, which includes a plurality of coils, and each coil is disposed on a first stator tooth 104 .

[0126] In this embodiment, the stator structure 100 also includes a winding, which includes a plurality of coils. The coil is wound around the tooth body of a first stator tooth 104 to ensure that the motor using the stator structure 100 outputs torque during operation. In addition, by winding each coil only around the tooth body of a first stator tooth 104, that is, adopting a concentrated winding structure with single tooth winding, the motor winding end is smaller, which is conducive to reducing copper loss, and facilitates modularization and improves production efficiency. Since no winding is wound around the second tooth body 114 of the second stator tooth 112, each phase winding can be physically isolated, reducing the mutual inductance between phases, thereby improving the reliability of the motor operation.

[0127] Furthermore, in the axial direction of the stator structure 100 , the cross-section of the groove 122 may be polygonal or arc-shaped.

[0128] According to the second aspect of the present invention, Figure 5 and Figure 6 As shown, a motor 200 is proposed, comprising: a rotor structure 202 ; and a stator structure 100 as in any one of the above technical solutions, wherein at least a portion of the stator structure 100 is located within the rotor structure 202 .

[0129] The motor 200 provided by the present invention includes a rotor structure 202 and the stator structure 100 of any of the above-described technical solutions, wherein at least a portion of the stator structure 100 is located within the rotor structure 202. Specifically, the stator structure 100 and the rotor structure 202 are arranged concentrically to ensure that the rotor structure 202 can rotate relative to the stator structure 100 to achieve power output of the motor 200. While a portion of the stator structure 100 is located within the rotor structure 202, the entire stator structure 100 in the axial direction can also be arranged within the rotor structure 202 to achieve different matching modes between the permanent magnets of the rotor structure 202 and the windings of the stator structure 100.

[0130] Furthermore, the motor 200 provided by the present invention includes the stator structure 100 according to the first aspect of the present invention. Therefore, all the beneficial effects of the stator structure 100 are achieved, which will not be discussed in detail here.

[0131] In any of the above embodiments, further, Figure 5 and Figure 6 As shown, the rotor structure 202 includes: a rotor core 204 , which is sleeved on the outside of the stator structure 100 ; and permanent magnets 206 , which are disposed on the rotor core 204 .

[0132] In this embodiment, the rotor structure 202 further includes a rotor core 204 and permanent magnets 206. The permanent magnets 206 are disposed on the rotor core 204, and a plurality of permanent magnetic poles are formed by the permanent magnets 206.

[0133] Specifically, when at least a portion of the rotor structure 202 is located inside the stator structure 100 , the permanent magnets 206 may be placed on the outer surface of the rotor core 204 , or placed inside the rotor core 204 , such as in a V-shaped or spoke-shaped magnet arrangement.

[0134] Specifically, when at least a portion of the stator structure 100 is located within the rotor structure 202, the permanent magnets 206 are retained on the inner surface of the rotor core 204. The permanent magnet poles can be composed of a plurality of permanent magnets 206 having two lateral edges and substantially arc-shaped inner and outer surfaces, or can be an integrally formed magnetic ring. Alternatively, the permanent magnets 206 can be made of ferrite, plastic magnets, rare earth permanent magnets, or rubber magnetic strips.

[0135] Furthermore, there are multiple permanent magnets 206 , and adjacent permanent magnets 206 are arranged with opposite polarities.

[0136] Specifically, the number of permanent magnets 206 may include multiple permanent magnets 206, and the multiple permanent magnets 206 are arranged in sequence on the rotor core 204, and the polarity directions of the multiple permanent magnets 206 are opposite. Specifically, the permanent magnets 206 may include multiple arc-shaped permanent magnets 206, and the multiple arc-shaped permanent magnets 206 are distributed in a circular shape, and the polarity of two adjacent arc-shaped permanent magnets 206 is opposite.

[0137] Furthermore, if Figure 6 As shown, an angle γ is formed between the line connecting the center of the stator yoke 102 to the two ends of the permanent magnet 206. The existence of the angle can further change the air gap magnetic permeability process, enhance the magnetic field modulation effect, and increase the amplitude of the working sub-magnetic flux density harmonic, thereby further improving the torque of the motor 200 using the sub-rotor structure 202. This also avoids the problem of a decrease in the number of magnetic poles and a decrease in the amplitude of the fundamental wave of the magnetic field after the alternating poles are used in the traditional permanent magnet motor 200, which leads to a decrease in torque.

[0138] Specifically, 0.9<γ / (π / (P1))<1.7 is satisfied, where P1 is the number of permanent magnets 206 . When the angle γ satisfies the above condition, the working performance of the rotor structure 202 is good.

[0139] Furthermore, if Figure 7 、 Figure 8 and Figure 9As shown, the permanent magnet 206 includes a plurality of arc-shaped permanent magnets. The plurality of arc-shaped permanent magnets are distributed in a circular ring shape, and the polarities of two adjacent arc-shaped permanent magnets are different. Specifically, the number of magnetic poles of each arc-shaped permanent magnet is 1, 2, or 4, and the polarities of adjacent magnetic poles are alternately different.

[0140] Specifically, permanent magnet 206 comprises an integrated annular permanent magnet. In this case, when the annular permanent magnet has multiple magnetic poles, the number of permanent magnets 206 can be reduced, the installation process time of permanent magnet 206 can be shortened, and manufacturing and assembly efficiency can be improved. Furthermore, when the magnetic pole width is small, using a single annular permanent magnet with multiple poles can increase the width of the annular permanent magnet, reducing the difficulty of processing the annular permanent magnet.

[0141] Specifically, the permanent magnets 206 may be arranged in a Halbach array.

[0142] In any of the above embodiments, further, at least two auxiliary teeth 110 are provided on the first stator tooth 104 in the stator teeth 118, the number of the first stator teeth 104 is a, the number of the auxiliary teeth 110 on each stator tooth 118 is x, the number of pole pairs of the stator structure 100 is Pa, and the number of pole pairs of the permanent magnet is Pr.

[0143] When the stator teeth 118 include the first stator tooth 104 , Pa=|a×x±Pr| is satisfied; or

[0144] When the stator teeth 118 include the first stator teeth 104 and the second stator teeth 112 , Pa=|a×(x+1)±Pr| is satisfied.

[0145] In this embodiment, by limiting the number of stator winding pole pairs, new harmonic components appearing in the air gap magnetic flux density can be used as the working harmonics of the motor to provide output torque for the motor, thereby effectively improving the torque density of the motor.

[0146] According to a third aspect of the present invention, an electrical device is provided, comprising the motor 200 according to any one of the above technical solutions.

[0147] The electrical device provided by the present invention includes a motor 200 according to any of the above technical solutions, wherein a non-uniform air gap can be formed between the stator structure 100 and the rotor structure 202 of the motor 200, thereby improving the waveform of the air gap magnetic field, reducing the cogging torque and torque ripple of the motor 200, and improving the reliability of the motor 200. Furthermore, the uniformity of the magnetic field distribution during operation of the motor 200 is ensured, thereby ensuring the stability of the motor 200 during operation. This further ensures the stability of the electrical device during operation.

[0148] Specifically, the electrical appliance may include an air conditioner, a washing machine, or a vacuum cleaner.

[0149] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise expressly defined, the orientations or positional relationships indicated by the terms "upper" and "lower" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connect," "install," and "fix" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0150] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0151] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A motor, characterized in that: include: rotor structure; A stator structure, comprising: stator yoke; at least two stator teeth, disposed on the stator yoke, with a notch between the tooth tops of two adjacent stator teeth; Wherein, at least part of the stator teeth includes at least two auxiliary teeth, a groove is provided between two adjacent auxiliary teeth on the same stator tooth, and in the circumferential direction of the stator structure, the width of the groove is not equal to the width of the notch; The at least two stator teeth include: at least two first stator teeth, each of the first stator teeth comprising a first tooth body and a first tooth shoe, one end of the first tooth body being connected to the stator yoke, the first tooth shoe being connected to the other end of the first tooth body, and the at least two auxiliary teeth being disposed on the first tooth shoe; at least two second stator teeth, each disposed between two adjacent first stator teeth, each second stator tooth comprising a second tooth body and a second tooth shoe, one end of the second tooth body being connected to the stator yoke, the second tooth shoe being connected to the other end of the second tooth body, and the notch being located between adjacent first tooth shoes and second tooth shoes; The rotor structure comprises: A rotor core, wherein the rotor core is sleeved on the stator structure; A permanent magnet is disposed on the rotor core; At least two auxiliary teeth are provided on the first stator tooth in the stator teeth, the number of the first stator teeth is a, the number of auxiliary teeth on each first stator tooth is x, the number of pole pairs of the stator structure is Pa, and the number of pole pairs of the permanent magnet is Pr. In a case where the stator teeth include the first stator teeth and the second stator teeth, Pa=|a×(x+1)±Pr| is satisfied.

2. The motor according to claim 1, characterized in that The at least two stator teeth include: At least two first stator teeth, any one of the first stator teeth includes a first tooth body and a first tooth shoe, one end of the first tooth body is connected to the stator yoke, and the first tooth shoe is connected to the other end of the first tooth body, the at least two auxiliary teeth are arranged on the first tooth shoe, and the notch is located between two adjacent first tooth shoes.

3. The motor according to claim 2, characterized in that On the same first stator tooth, an angle β is formed between the tooth body bisectors of two adjacent auxiliary teeth, and satisfies 1≤β / (2π / (a×x))<1.4, where a represents the number of the first stator teeth, and x represents the number of the auxiliary teeth on each first stator tooth.

4. The motor according to claim 1, characterized in that On the same first stator tooth, an angle β is formed between the tooth body bisectors of two adjacent auxiliary teeth, and satisfies 0.5≤β / (2π / (a×x))<1.4, where a represents the number of the first stator teeth, and x represents the number of the auxiliary teeth on each first stator tooth.

5. The motor according to claim 1, characterized in that The width of the second tooth body is smaller than the width of the first tooth body; and / or The width of the second tooth shoe is smaller than the width of the first tooth shoe.

6. The electric motor according to any one of claims 2 to 5, characterized in that The first stator teeth and the stator yoke are detachable.

7. The motor according to claim 4 or 5, characterized in that The second stator teeth are detachable from the stator yoke.

8. The motor according to any one of claims 1 to 5, characterized in that In the circumferential direction of the stator structure, the widths of two adjacent slots are equal; and / or In the circumferential direction of the stator structure, the widths of two adjacent grooves are equal.

9. The motor according to claim 4 or 5, characterized in that The stator structure further comprises: The winding includes a plurality of coils, and each coil is arranged on one of the first stator teeth.

10. The electric motor according to any one of claims 1 to 5, characterized in that In the axial direction of the stator structure, the cross-section of the groove is in the shape of a square, polygon or arc.

11. The motor according to claim 1, characterized in that There are multiple permanent magnets, and adjacent permanent magnets are arranged with opposite polarities.

12. The motor according to claim 1, characterized in that The permanent magnet includes an annular permanent magnet, and the annular permanent magnet is sleeved outside the stator structure.

13. An electrical device, characterized in that: include: A motor as claimed in any one of claims 1 to 12.

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