Stator Structure, Electric Machine, and Electrical Equipment

Abstract

The present invention provides a stator structure, a motor and an electrical equipment, comprising: a stator core, which includes a stator yoke and a plurality of stator teeth, the plurality of stator teeth are arranged on the stator yoke, and stator slots are formed between adjacent stator teeth, and the stator teeth include: a tooth body and a tooth boot, the tooth body is arranged on the stator yoke, and the tooth boot is arranged on the tooth body; a winding, which is arranged on the stator teeth, the winding includes flat wires wound concentrically on the stator teeth, the flat wires are wound in multiple layers on the stator teeth, and the number of flat wires in the layer of the winding far from the stator teeth is not more than the number of flat wires in the layer of the winding close to the stator teeth, wherein the width of the side of the tooth body close to the tooth boot is 2×t1, the width of the side of the tooth body close to the stator yoke is 2×t2, and 1.5×t1≥t2≥t1. The concentric winding form facilitates the automatic winding of the flat wires, and by optimizing the dimensions of the stator teeth, the full slot rate of the flat wires is improved, thereby taking into account both the economic cost and the motor performance.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator structure, a motor, and an electrical appliance device. Background Art

[0002] In related technologies, the stator winding of a motor can be wound with flat wires. Most common motors with flat wire windings adopt distributed windings and parallel slot structures, which require relatively complex winding equipment. Although centralized windings are conducive to automatic winding, their slot fill factor is relatively low. Therefore, how to improve the slot fill factor while facilitating winding has become a technical problem to be solved urgently. 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 a motor.

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

[0007] In view of this, according to the first aspect of the present invention, a stator structure is provided, including: a stator core, the stator core includes a stator yoke and a plurality of stator teeth, the plurality of stator teeth are arranged on the stator yoke, and stator slots are formed between adjacent stator teeth. The stator teeth include: a tooth body and a tooth boot, the tooth body is arranged on the stator yoke, and the tooth boot is arranged on the tooth body; a winding, arranged on the stator teeth, the winding includes flat wires wound concentrically on the stator teeth, the flat wires are wound in multiple layers on the stator teeth, and the number of flat wires in the layer of the winding away from the stator teeth is not more than the number of flat wires in the layer of the winding close to the stator teeth. Wherein, the width of the side of the tooth body close to the tooth boot is 2×t1, the width of the side of the tooth body close to the stator yoke is 2×t2, and 1.5×t1≥t2≥t1.

[0008] The stator structure proposed by the present invention includes a stator core and windings. Among them, the stator core includes a stator yoke and a plurality of stator teeth arranged on the stator yoke. Stator slots are formed between adjacent stator teeth, and the windings include flat wires. The flat wires are wound around the stator teeth to form windings. Moreover, the flat wires are wound in a concentrated winding form, so that the flat wires on the same stator tooth are more regular, which is beneficial to improving the slot fill factor. And the flat wires are wound around the stator teeth in a multi-layer structure. Among them, the number of flat wires in the layer of the winding far from the stator tooth is not more than the number of flat wires in the layer of the winding close to the stator tooth. Therefore, the length of the end of the winding far from the stator tooth in the radial direction of the stator core is less than the length of the end of the winding close to the stator tooth in the radial direction of the stator core. Thus, the windings on one stator tooth in one stator slot form a structure similar to a triangle, which can reduce the probability of intersection of windings on two different stator teeth. Under the same conditions, more flat wires can be accommodated in one stator slot, thereby improving the full slot rate of the stator core and the efficiency of the motor.

[0009] Moreover, the stator tooth includes: a tooth body arranged on the stator yoke; a tooth boot arranged on the tooth body. That is, the stator tooth includes a tooth body and a tooth boot arranged at the end of the tooth body, so that windings can be arranged on the tooth body, and the air gap of the motor can be improved through the tooth boot.

[0010] Furthermore, the width of the side of the tooth body close to the tooth boot is 2×t1, and the width of the side of the tooth body close to the stator yoke is 2×t2, where 1.5×t1≥t2≥t1.

[0011] That is to say, the width of the side of the tooth body close to the tooth boot is 2×t1, and the width of the side of the tooth body close to the stator yoke is 2×t2. Half of the width of the side of the tooth body close to the tooth boot, which is t1, multiplied by 1.5 is greater than or equal to half of the width of the side of the tooth body close to the stator yoke, which is t2. Half of the width of the side of the tooth body close to the stator yoke, which is t2, is greater than or equal to half of the width of the side of the tooth body close to the tooth boot, which is t1. Thus, the angle between the two side walls of the stator slot is appropriate, which is more conducive to increasing the cross-sectional area of the stator slot and facilitating the accommodation of more flat wires.

[0012] And, adopting the concentrated winding form is convenient for the automatic winding of flat wires. Also, by optimizing the dimensions of the stator teeth, the full slot rate of the flat wires is improved, thus taking into account both economic costs and motor performance.

[0013] In addition, according to the stator structure in the above technical solution provided by the present invention, the following additional technical features may also be included:

[0014] On the basis of the above technical solution, further, the side of the stator yoke facing the stator teeth, and the part between the adjacent stator teeth is the bottom wall of the stator slot, and the side of the stator teeth facing the stator slot is the side wall of the stator slot, wherein the length of the cross section of the flat wire is x, the width is y, the straight-line distance between the ends of the two side walls facing the bottom wall is n, the straight-line distance between the ends of the two side walls away from the bottom wall is m, and along the radial direction of the stator core, the distance between the two ends of the side wall is h, wherein 0.25×h÷m <x÷y<6×h÷n。

[0015] In this technical solution, the stator slot is formed by a stator yoke and two adjacent stator teeth, that is, the part of the stator yoke located between two adjacent stator teeth is the bottom wall of the stator slot between the two adjacent stator teeth, the stator slot is formed by a stator yoke and two adjacent stator teeth, that is, the part of the stator yoke located between two adjacent stator teeth is the bottom wall of the stator slot between the two adjacent stator teeth, the side wall of one stator tooth is the side wall on one side of the stator slot, and the side wall of the other stator tooth is the side wall on the other side of the stator slot, and the length of the cross section of the flat wire is x, the width of the cross section of the flat wire is y, the straight-line distance between the ends of the two side walls facing the bottom wall is n, the straight-line distance between the ends of the two side walls facing away from the bottom wall is m, and along the radial direction of the stator core, the distance between the two ends of the side wall is h, satisfying 0.25×h÷m <x÷y<6×h÷n,进而可以将定子槽的截面看作一个梯形,进而设置梯形的上底、下底和高,与扁线的长度和宽度之间的关系进行限定,可以尽可能减少定子槽内部空间的浪费,尽可能地提升定子槽的槽满率。

[0016] On the basis of any of the above technical solutions, further, along the radial direction of the stator core, adjacent flat wires are in contact with each other.

[0017] In this technical solution, adjacent flat wires are fitted together along the radial direction of the stator core, so that the distance between the flat wires is zero, thereby increasing the number of flat wires that can be accommodated in the stator slots and improving the full slot rate of the stator core.

[0018] On the basis of any of the above technical solutions, further, along the circumferential direction of the stator core, adjacent flat wires are in contact with each other.

[0019] In this technical solution, adjacent flat wires are fitted together along the circumference of the stator core, so that the distance between the flat wires is zero, thereby increasing the number of flat wires that can be accommodated in the stator slots and improving the full slot rate of the stator core.

[0020] On the basis of any of the above technical solutions, further, the stator teeth are trapezoidal stator teeth or parallel stator teeth.

[0021] In this technical solution, the stator teeth can be trapezoidal stator teeth or parallel stator teeth.

[0022] On the basis of any of the above technical solutions, further, the bottom wall is a plane, an arc surface, a combination of multiple planes, a combination of multiple arc surfaces, or a combination of multiple arc surfaces and planes.

[0023] In this technical solution, the bottom of the stator tooth groove can be a flat structure, an arc surface structure, a structure combining multiple planes, a structure combining multiple arc surfaces, or a structure combining multiple planes and arc surfaces.

[0024] On the basis of any of the above technical solutions, further, the bottom wall is a plane, and the included angle β between the bottom wall and the side wall satisfies β≥π÷2 - π÷Z1, where Z1 is the number of stator teeth.

[0025] In this technical solution, the included angle β between the bottom wall and the side wall satisfies β≥π÷2 - π÷Z1, thereby forming a larger angle between the bottom wall and the side wall of the stator slot, increasing the cross-sectional area of the stator slot, increasing the number of flat wires that the stator slot can accommodate, and improving the efficiency of the motor.

[0026] On the basis of any of the above technical solutions, further, the bottom wall is an arc surface, and the included angle β between the side wall and the tangent line passing through the intersection point of the bottom wall and the side wall satisfies β≥π÷2 - π÷Z1, where Z1 is the number of stator teeth.

[0027] In this technical solution, the included angle β between the side wall and the tangent line passing through the bottom wall satisfies β≥π÷2 - π÷Z1, thereby forming a larger angle between the bottom wall and the side wall of the stator slot, increasing the cross-sectional area of the stator slot, increasing the number of flat wires that the stator slot can accommodate, and improving the efficiency of the motor.

[0028] On the basis of any of the above technical solutions, further, the number of flat wires of different windings in the same stator slot is the same.

[0029] In this technical solution, two windings on two stator teeth need to be accommodated in one stator slot. Further, the number of flat wires of different windings in the same stator slot is the same, which can make different windings evenly divide a stator slot. Thus, the number of flat wires of each winding is the same, making the magnetic field formed by the stator structure more uniform and maximizing the number of flat wires of each winding.

[0030] On the basis of any of the above technical solutions, further, an insulating member is provided between the stator core and the winding.

[0031] In this technical solution, an insulating member is provided between the stator core and the winding, so that the current is concentrated in the winding, reducing the absorption of current by the core and affecting the magnetic field environment.

[0032] On the basis of any of the above technical solutions, further, the flat wire includes: a conductor; an insulating layer provided outside the conductor.

[0033] In this technical solution, the flat wire includes a conductor and an insulating layer provided outside the conductor. The insulating layer enables the flat wire to conduct electricity only in the winding direction, which is conducive to realizing electromagnetic induction and enhancing the magnetic field strength.

[0034] According to the second aspect of the present invention, the present invention provides a motor, including: a rotor structure; a stator structure as proposed in any of the above technical solutions.

[0035] The motor provided by the present invention includes a stator structure as proposed in any of the above technical solutions. Therefore, it has all the beneficial effects of the stator structure as proposed in any of the above technical solutions, which will not be elaborated one by one here.

[0036] According to the third aspect of the present invention, the present invention provides an electrical equipment, including: a motor as proposed in any of the above technical solutions.

[0037] The electrical equipment provided by the present invention includes a motor as proposed in any of the above technical solutions. Therefore, it has all the beneficial effects of the motor as proposed in any of the above technical solutions, which will not be elaborated one by one here.

[0038] The additional aspects and advantages of the present invention will become obvious in the following description part, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0040] Figure 1 A schematic structural diagram of a stator structure provided by an embodiment of the present invention is shown;

[0041] Figure 2 A schematic structural diagram of a part of the stator structure provided by an embodiment of the present invention is shown;

[0042] Figure 3 A schematic structural diagram of a cross-section of a flat wire of a stator structure provided by an embodiment of the present invention is shown;

[0043] Figure 4 A schematic structural diagram of a part of the stator structure provided by an embodiment of the present invention is shown;

[0044] Figure 5 A schematic structural diagram of a part of the stator structure provided by an embodiment of the present invention is shown;

[0045] Figure 6Schematic diagram showing a partial view of the stator structure provided by an embodiment of the present invention;

[0046] Figure 7 Schematic diagram showing a partial view of the stator structure provided by an embodiment of the present invention;

[0047] Figure 8 Schematic diagram showing a partial view of the stator structure provided by an embodiment of the present invention;

[0048] Figure 9 Schematic diagram showing a partial view of the stator structure provided by an embodiment of the present invention;

[0049] Figure 10 Schematic diagram showing a partial view of the stator structure provided by an embodiment of the present invention;

[0050] Figure 11 Comparison chart showing the slot fill factor, efficiency, and copper loss of the stator structure provided by some embodiments of the present invention when applied to a motor and a motor in the related art.

[0051] Wherein, Figures 1 to 10 The corresponding relationship between the reference numerals and the component names in the figure is:

[0052] 100 Stator structure, 110 Stator core, 112 Stator yoke, 114 Stator teeth, 116 Tooth body, 118 Tooth boot, 120 Stator slot, 122 Bottom wall, 124 First side wall, 126 Second side wall, 130 Winding, 132 Flat wire, 134 Conductor, 136 Insulation layer, 140 Insulating part. Detailed implementation manners

[0053] In order to more clearly understand the above objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0054] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0055] The following refers to Figures 1 to 11 to describe the stator structure 100, motor, and electrical equipment provided by some embodiments of the present invention.

[0056] Embodiment 1:

[0057] As Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown in Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 , the present invention provides a stator structure 100, including: a stator core 110; and windings 130 wound around the stator core 110. Among them, the windings 130 adopt a concentrated winding method. The stator core 110 includes stator slots 120 and a plurality of stator teeth 114. The stator yoke 112 is annular. The plurality of stator teeth 114 are arranged at intervals on the inner circle of the stator yoke 112, and stator slots 120 are formed between adjacent stator teeth 114. The windings 130 are wound on the stator teeth 114 and partially located in the stator slots 120. Among them, the windings 130 adopt flat wires 132, and each stator tooth 114 is wound with multiple layers of flat wires 132. The multiple layers of flat wires 132 are arranged outward from the stator tooth 114. Among them, the number of flat wires 132 in the layer of flat wires 132 on the stator tooth 114 close to the stator tooth 114 is not less than the number of flat wires 132 in the layer of flat wires 132 on the stator tooth 114 far from the stator tooth 114.

[0058] The stator structure 100 provided by the present invention includes a stator core 110 and windings 130. Among them, the stator core 110 includes a stator yoke 112 and a plurality of stator teeth 114 arranged on the stator yoke 112. Stator slots 120 are formed between adjacent stator teeth 114. The windings 130 include flat wires 132. The flat wires 132 are wound on the stator teeth 114 to form the windings 130. And the flat wires 132 adopt a concentrated winding form, so that the flat wires 132 on the same stator tooth 114 are more regular, which is beneficial to improving the slot fill factor. And the flat wires 132 are wound on the stator teeth 114 in a multi-layer structure. Among them, the number of flat wires 132 in the layer of flat wires 132 of the windings 130 far from the stator tooth 114 is not more than the number of flat wires 132 in the layer of flat wires 132 of the windings 130 close to the stator tooth 114. Furthermore, the length of the end of the windings 130 far from the stator tooth 114 in the radial direction of the stator core 110 is smaller than the length of the end of the windings 130 close to the stator tooth 114 in the radial direction of the stator core 110. Thus, the windings 130 on one stator tooth 114 in one stator slot 120 form a structure similar to a triangle, which can reduce the probability of intersection of the windings 130 on two different stator teeth 114. Under the same conditions, more flat wires 132 can be accommodated in one stator slot 120, thereby improving the slot fill factor of the stator core 110 and the efficiency of the motor.

[0059] Specifically, the flat wire 132 is a wire with a rectangular cross-section. Specifically, the dimensions of the cross-sections of the flat wire 132 are consistent everywhere.

[0060] As Figure 1 , Figure 2 and Figure 10As shown, further, the stator tooth 114 includes: a tooth body 116 and a tooth collar 118. One end of the tooth body 116 is connected to the stator yoke 112, and the other end is connected to the tooth collar 118.

[0061] In this embodiment, the stator tooth 114 includes a tooth body 116 and a tooth collar 118 provided at the end of the tooth body 116. Furthermore, a winding 130 can be provided on the tooth body 116, and the overall tooth collar 118 improves the air gap of the motor.

[0062] Furthermore, as Figure 2 and Figure 10 shown, the width of the side of the tooth body 116 close to the tooth collar 118 is 2×t1, and the width of the side of the tooth body 116 close to the stator yoke 112 is 2×t2, where 1.5×t1≥t2≥t1.

[0063] In this embodiment, the width of the side of the tooth body 116 close to the tooth collar 118 is 2×t1, and the width of the side of the tooth body 116 close to the stator yoke 112 is 2×t2. Half of the width of the side of the tooth body 116 close to the tooth collar 118, which is t1, is greater than or equal to half of the width of the side of the tooth body 116 close to the stator yoke 112, which is t2. Half of the width of the side of the tooth body 116 close to the stator yoke 112, which is t2, is greater than or equal to half of the width of the side of the tooth body 116 close to the tooth collar 118, which is t1. Furthermore, the angle between the two side walls of the stator slot 120 is appropriate, which is more conducive to increasing the cross-sectional area of the stator slot 120 and facilitating the accommodation of more flat wires 132.

[0064] As Figure 2 and Figure 10 shown, a stator slot 120 is defined by a part of the stator yoke 112 and two adjacent stator teeth 114. In Figure 2 and Figure 10 shown, a complete stator slot 120, a part of the stator yoke 112, and half of each of the two stator teeth 114 adjacent to both sides of the stator slot 120. Therefore, in Figure 2 and Figure 10 the t2 of the stator tooth 114 is half of the width of the side of the tooth body 116 close to the stator yoke 112, and t1 is half of the width of the side of the tooth body 116 close to the tooth collar 118.

[0065] Furthermore, based on 1.5×t1≥t2≥t1, it can be ensured that the β angle is within a certain range, thus avoiding too low accommodation capacity of the stator slot 120. Moreover, in the radial direction of the stator core 110, the stator slot 120 also has a certain length, so that more flat wires 132 can be accommodated.

[0066] For example: t1=5mm, then 7.5mm≥t2≥5mm, t1=4mm, then 6mm≥t2≥4mm. The above is just a description of the distance. In the present invention, the values ​​of t1 and t2 can be any values ​​that meet 1.5×t1≥t2≥t1.

[0067] In addition, the centralized winding method is adopted to facilitate the automated winding of the flat wire 132 , and the full slot rate of the flat wire 132 is improved by idling the size of the stator teeth 114 , thereby taking into account both economic cost and motor performance.

[0068] Embodiment 2:

[0069] like Figure 5 , Figure 8 and Figure 9 As shown, on the basis of Example 1, further, the side of the stator yoke 112 facing the stator tooth 114 and the part located between adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120, the side of the stator tooth 114 on one side facing the stator slot 120 is the first side wall 124 of the stator slot 120, and the side of the stator tooth 114 on the other side facing the stator slot 120 is the second side wall 126 of the stator slot 120, the cross-section of the flat wire 132 has a length of x, a width of y, a straight-line distance between the ends of the two side walls facing the bottom wall 122 is n, a straight-line distance between the ends of the two side walls away from the bottom wall 122 is m, and along the radial direction of the stator core 110, the distance between the two ends of the side wall is h, wherein 0.25×h÷m <x÷y<6×h÷n。

[0070] In this embodiment, the stator slot 120 is surrounded by a stator yoke 112 and two adjacent stator teeth 114, that is, the portion of the stator yoke 112 located between two adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120 between the two adjacent stator teeth 114, wherein the side wall of one stator tooth 114 is the first side wall 124 of the stator slot 120, and the side wall of the other stator tooth 114 is the second side wall 126 of the stator slot 120.

[0071] The length of the cross section of the flat wire 132 is x, the width of the cross section of the flat wire 132 is y, the straight-line distance between the ends of the two side walls facing the bottom wall 122 is n, the straight-line distance between the ends of the two side walls away from the bottom wall 122 is m, and the distance between the two ends of the side wall along the radial direction of the stator core 110 is h, which satisfies 0.25×h÷m <x÷y<6×h÷n,进而可以将定子槽120的截面看作一个梯形,进而设置梯形的上底、下底和高,与扁线132的长度和宽度之间的关系进行限定,可以尽可能减少定子槽120内部空间的浪费,尽可能地提升定子槽120的槽满率。

[0072] Specifically, the flat wire 132 is accommodated inside the stator slot 120. If the dimensions of the flat wire 132 and the stator slot 120 do not match, it may lead to waste of the space inside the stator slot 120. Therefore, the aspect ratio of the cross-section of the flat wire 132, the ratio of the height of the stator slot 120 to its upper bottom, and the ratio of the height of the stator slot 120 to its lower bottom are defined, so that the number of layers of the flat wire 132 and the number of single flat wires 132 can match the stator slot 120, avoiding excessive remaining space in the stator slot 120 that cannot accommodate the flat wire 132.

[0073] Embodiment 3:

[0074] As Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 shown, on the basis of Embodiment 1 or Embodiment 2, further, along the radial direction of the stator core 110, adjacent flat wires 132 are in contact with each other.

[0075] In this embodiment, along the radial direction of the stator core 110, adjacent flat wires 132 are in contact with each other, so that there is zero distance between the flat wires 132, increasing the number of flat wires 132 that can be accommodated in the stator slot 120 and increasing the full slot rate of the stator core 110.

[0076] Specifically, among the flat wires 132 in the same layer, adjacent flat wires 132 are in contact with each other, so that more wires can be accommodated in the same layer of flat wires 132, which helps to increase the full slot rate.

[0077] Embodiment 4:

[0078] As Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 shown, on the basis of any one of Embodiments 1 to 3, further, along the circumferential direction of the stator core 110, adjacent flat wires 132 are in contact with each other.

[0079] In this embodiment, along the circumferential direction of the stator core 110, adjacent flat wires 132 are in contact with each other, so that there is zero distance between the flat wires 132, increasing the number of flat wires 132 that can be accommodated in the stator slot 120 and increasing the full slot rate of the stator core 110.

[0080] Specifically, adjacent layers of flat wires 132 are in contact with each other, so that the winding 130 can accommodate more layers of wires, which helps to increase the full slot rate.

[0081] Moreover, in the same layer of flat wires 132, adjacent flat wires 132 are in contact with each other, and flat wires 132 in adjacent layers are in contact with each other, so that more wire materials can be accommodated in the stator slots 120, which helps to improve the slot filling factor.

[0082] Embodiment 5:

[0083] As Figure 2 shown, on the basis of any one of Embodiments 1 to 4, further, the stator teeth 114 adopt trapezoidal stator teeth 114. The trapezoidal stator teeth 114 mean that there is a certain angle between the two faces of the stator teeth 114 facing different stator slots 120.

[0084] Alternatively, the stator teeth 114 adopt parallel stator teeth 114. The parallel stator teeth 114 mean that the two faces of the stator teeth 114 facing different stator slots 120 are parallel to each other.

[0085] Furthermore, the shape of the stator teeth 114 can affect the slot shape of the stator slots 120.

[0086] Embodiment 6:

[0087] As Figure 5 、 Figure 8 and Figure 9 shown, on the basis of any one of Embodiments 1 to 5, further, the part of the stator yoke 112 facing the stator teeth 114 and located between adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120, the side of one stator tooth 114 facing the stator slot 120 is the first side wall 124 of the stator slot 120, the side of the other stator tooth 114 facing the stator slot 120 is the second side wall 126 of the stator slot 120, and the bottom wall 122 is a planar structure.

[0088] In this embodiment, the stator slot 120 is surrounded by the stator yoke 112 and two adjacent stator teeth 114. That is, the part of the stator yoke 112 located between two adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120 between these two adjacent stator teeth 114, the side wall of one stator tooth 114 is the first side wall 124 of this stator slot 120, the side wall of the other stator tooth 114 is the second side wall 126 of this stator slot 120, and further the bottom of the stator teeth 114 can be a planar structure.

[0089] Further, the included angle β between the bottom wall 122 and the first side wall 124 is ≥π÷2 - π÷Z1, where Z1 is the number of stator teeth 114. Similarly, the included angle between the bottom wall 122 and the second side wall 126 is equal to β.

[0090] In this embodiment, the included angle β between the bottom wall 122 and the first side wall 124 satisfies β ≥ π÷2 - π÷Z1, thereby forming a relatively large angle between the bottom wall 122 and the first side wall 124 of the stator slot 120, so as to increase the cross-sectional area of the stator slot 120, increase the number of flat wires 132 that the stator slot 120 can accommodate, and improve the efficiency of the motor. Specifically, taking the number of stator teeth 114 as 12 as an example, β ≥ π÷2 - π÷12, and then β ≥ 5π÷12. This can avoid the angle β being too small and improve the ability of the stator slot 120 to accommodate the flat wire 132. Similarly, the included angle between the bottom wall 122 and the second side wall 126 is equal to β, and it has the same effect.

[0091] Embodiment 7:

[0092] As Figure 6 shown, on the basis of any one of Embodiments 1 to 5, further, the part of the stator yoke 112 facing the stator teeth 114 and located between adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120, the side of one stator tooth 114 facing the stator slot 120 is the first side wall 124 of the stator slot 120, the side of the other stator tooth 114 facing the stator slot 120 is the second side wall 126 of the stator slot 120, and the bottom wall 122 is a combination of multiple planes.

[0093] In this embodiment, the stator slot 120 is formed by the stator yoke 112 and two adjacent stator teeth 114. That is, the part of the stator yoke 112 located between two adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120 between these two adjacent stator teeth 114. The side wall of one stator tooth 114 is the first side wall 124 of this stator slot 120, and the side wall of the other stator tooth 114 is the second side wall 126 of this stator slot 120. Thus, the bottom of the stator tooth 114 can be a structure composed of multiple planes.

[0094] Specifically, the bottom wall 122 of the stator slot 120 is composed of two planes, and the intersection of the two planes is on the bisecting plane where the stator slot 120 is located. Thus, the stator slots 120 on both sides are axisymmetric with respect to the bisecting plane of the stator slot 120.

[0095] Further, the included angle β between the bottom wall 122 and the first side wall 124 satisfies β ≥ π÷2 - π÷Z1, where Z1 is the number of stator teeth 114. Similarly, the included angle between the bottom wall 122 and the second side wall 126 is equal to β.

[0096] In this embodiment, the included angle β between the bottom wall 122 and the first side wall 124 satisfies β≥π÷2 - π÷Z1, so that a relatively large angle is formed between the bottom wall 122 and the first side wall 124 of the stator slot 120, thereby increasing the cross-sectional area of the stator slot 120, increasing the number of flat wires 132 that the stator slot 120 can accommodate, and improving the efficiency of the motor. Specifically, taking the number of stator teeth 114 as 12 as an example, β≥π÷2 - π÷12, and further β≥5π÷12. This avoids too small an angle β and improves the ability of the stator slot 120 to accommodate the flat wire 132. Similarly, the included angle between the bottom wall 122 and the second side wall 126 is equal to β, and it has the same effect.

[0097] Embodiment 8:

[0098] As Figure 7 shown, on the basis of any one of Embodiments 1 to 5, further, the side of the stator yoke 112 facing the stator teeth 114 and located between adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120, the side of one stator tooth 114 facing the stator slot 120 is the first side wall 124 of the stator slot 120, the side of the other stator tooth 114 facing the stator slot 120 is the second side wall 126 of the stator slot 120, and the bottom wall 122 has an arc-shaped structure.

[0099] In this embodiment, the stator slot 120 is formed by enclosing the stator yoke 112 and two adjacent stator teeth 114. That is, the part of the stator yoke 112 located between two adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120 between these two adjacent stator teeth 114. The side wall of one stator tooth 114 is the first side wall 124 of this stator slot 120, and the side wall of the other stator tooth 114 is the second side wall 126 of this stator slot 120. Furthermore, the bottom of the stator tooth 114 can be of an arc-shaped structure.

[0100] Further, the included angle β between the tangent line b passing through the intersection of the bottom wall 122 and the first side wall 124 and the first side wall 124 satisfies β≥π÷2 - π÷Z1, where Z1 is the number of stator teeth 114. The included angle between the tangent line b passing through the intersection of the bottom wall 122 and the second side wall 126 and the second side wall 126 is equal to β.

[0101] In this embodiment, the included angle β between the first side wall 124 and the tangent line b of the bottom wall 122 is β≥π÷2 - π÷Z1, so that a relatively large angle is formed between the bottom wall 122 and the first side wall 124 of the stator slot 120, thereby increasing the cross-sectional area of the stator slot 120, increasing the number of flat wires 132 that the stator slot 120 can accommodate, and improving the efficiency of the motor. Specifically, taking the number of stator teeth 114 as 12 as an example, β≥π÷2 - π÷12, and further β≥5π÷12. This can avoid too small an angle β and improve the ability of the stator slot 120 to accommodate the flat wire 132. Similarly, the included angle between the bottom wall 122 and the second side wall 126 is equal to β, and it has the same effect.

[0102] Embodiment 9:

[0103] On the basis of any one of Embodiments 1 to 5, further, the part of the stator yoke 112 facing the stator teeth 114 and located between adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120. One side of the stator teeth 114 facing the stator slot 120 is the first side wall 124 of the stator slot 120, and the other side of the stator teeth 114 facing the stator slot 120 is the second side wall 126 of the stator slot 120. The bottom wall 122 is a structure combined by multiple arc surfaces.

[0104] In this embodiment, the stator slot 120 is surrounded by the stator yoke 112 and two adjacent stator teeth 114. That is, the part of the stator yoke 112 located between two adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120 between these two adjacent stator teeth 114. The side wall of one stator tooth 114 is the first side wall 124 of this stator slot 120, and the side wall of the other stator tooth 114 is the second side wall 126 of this stator slot 120. Thus, the bottom of the stator tooth 114 can be a structure combined by multiple arc surfaces.

[0105] Specifically, the bottom wall 122 of the stator slot 120 is composed of two arc surfaces, and the intersection of the two arc surfaces is on the bisecting plane where the stator slot 120 is located. Thus, the stator slots 120 on both sides are axisymmetric with respect to the bisecting plane of the stator slot 120.

[0106] Further, the included angle β between the tangent line b at the intersection of the bottom wall 122 and the first side wall 124 and the first side wall 124 is β≥π÷2 - π÷Z1, where Z1 is the number of stator teeth 114. The included angle between the tangent line b at the intersection of the bottom wall 122 and the second side wall 126 and the second side wall 126 is equal to β.

[0107] In this embodiment, the included angle β between the first side wall 124 and the tangent line b of the bottom wall 122 is β≥π÷2 - π÷Z1, so that a relatively large angle is formed between the bottom wall 122 and the first side wall 124 of the stator slot 120, thereby increasing the cross-sectional area of the stator slot 120, increasing the number of flat wires 132 that the stator slot 120 can accommodate, and improving the efficiency of the motor. Specifically, taking the number of stator teeth 114 as 12 as an example, β≥π÷2 - π÷12, so β≥5π÷12. This avoids too small an angle β and improves the ability of the stator slot 120 to accommodate the flat wire 132. Similarly, the included angle between the bottom wall 122 and the second side wall 126 is equal to β, and it has the same effect.

[0108] Embodiment 10:

[0109] On the basis of any one of Embodiments 1 to 5, further, the part of the stator yoke 112 facing the stator teeth 114 and located between adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120, the side of one stator tooth 114 facing the stator slot 120 is the first side wall 124 of the stator slot 120, the side of the other stator tooth 114 facing the stator slot 120 is the second side wall 126 of the stator slot 120, and the bottom wall 122 is a structure combined by multiple planes and arc surfaces.

[0110] In this embodiment, the stator slot 120 is surrounded by the stator yoke 112 and two adjacent stator teeth 114. That is, the part of the stator yoke 112 located between two adjacent stator teeth 114 is the bottom wall 122 of the stator slot 120 between these two adjacent stator teeth 114, the side wall of one stator tooth 114 is the first side wall 124 of this stator slot 120, and the side wall of the other stator tooth 114 is the second side wall 126 of this stator slot 120. Furthermore, the bottom of the stator tooth 114 can be a structure combined by multiple planes and arc surfaces.

[0111] Further, if the bottom wall 122 connected to the first side wall 124 is a planar structure, it is applicable that the included angle β between the bottom wall 122 and the first side wall 124 is β≥π÷2 - π÷Z1, where Z1 is the number of stator teeth 114. Similarly, the bottom wall 122 connected to the second side wall 126 is also a planar structure, and the included angle between the bottom wall 122 and the second side wall 126 is equal to β.

[0112] If the bottom wall 122 connected to the first side wall 124 is an arc surface structure, it is applicable that the included angle β between the tangent line b at the junction of the bottom wall 122 and the first side wall 124 and the first side wall 124 is β≥π÷2 - π÷Z1, where Z1 is the number of stator teeth 114. Similarly, the bottom wall 122 connected to the second side wall 126 is also an arc surface structure, and the included angle between the tangent line b at the junction of the bottom wall 122 and the second side wall 126 and the second side wall 126 is equal to β.

[0113] Example 11:

[0114] As Figure 2 , Figure 4 and Figure 10 shown, on the basis of any one of Examples 1 to 10, further, the number of flat wires 132 of different windings 130 in the same stator slot 120 is the same.

[0115] In this embodiment, two windings 130 on two stator teeth 114 need to be accommodated in one stator slot 120. Furthermore, since the number of flat wires 132 of different windings 130 in the same stator slot 120 is the same, different windings 130 can equally divide one stator slot 120. As a result, the number of flat wires 132 of each winding 130 is the same, making the magnetic field formed by the stator structure 100 more uniform and maximizing the number of flat wires 132 of each winding 130.

[0116] Specifically, the winding 130 structures on each stator tooth 114 are the same.

[0117] Example 12:

[0118] As Figure 2 and Figure 10 shown, on the basis of any one of Examples 1 to 11, further, an insulating member 140 is provided between the stator core 110 and the winding 130.

[0119] In this embodiment, the insulating member 140 is provided between the stator core 110 and the winding 130, causing the current to concentrate on the winding 130 and reducing the influence of the core absorbing current on the magnetic field environment.

[0120] Specifically, the thickness of the insulating member 140 is usually relatively thin. Therefore, in practical applications, the insulating member 140 may not be considered. Of course, the thickness of the insulating member 140 can also be considered, so as to slightly increase the parameters of the stator slot 120.

[0121] Example 13:

[0122] As Figure 3 shown, on the basis of any one of Examples 1 to 11, further, the flat wire 132 includes a conductor 134 and an insulating layer 136, and the insulating layer 136 is provided outside the conductor 134.

[0123] In this embodiment, the flat wire 132 includes a conductor and an insulating layer 136 provided outside the conductor 134. The insulating layer 136 enables the flat wire 132 to conduct electricity only in the winding direction, thereby facilitating electromagnetic induction and enhancing the magnetic field strength.

[0124] Specifically, the insulating layer 136 has a uniform thickness around the wire 134, and the thickness is L. Among them, the wire 134 can be a copper wire or an aluminum wire.

[0125] Example 14:

[0126] As Figure 2 shown, for the stator structure 100 provided by an embodiment of the present invention, t1 = t2 in the stator teeth 114. The number of teeth Z1 of the stator teeth 114 is 12, and β = π÷2 - π÷Z1 = 5π÷12. There are three layers of rectangular wires 132 axially arranged in the stator teeth 114, and each layer contains q rectangular wires 132 (q≥1). The adjacent windings 130 are attached to each other radially, and the number of rectangular wires 132 in the winding 130 on the side of the circumferential winding 130 away from the stator teeth 114 is not higher than the number of rectangular wires 132 in the circumferential winding 130 on the side close to the stator teeth 114.

[0127] As Figure 3 shown, after the size of the conductor in the rectangular wire 132 plus the thickness L of the insulating layer 136, the cross-sectional length of the rectangular wire 132 is x, and the cross-sectional width is y. The slot fill factor of the actual wire 134 can reach 64.77%.

[0128] Specifically, as Figure 4 shown, the winding 130 is a concentrated winding 130, the slot shape of the stator slot 120 is equivalent to a trapezoid, Z1 = 12, and further β = π÷2 - π÷Z1 = 5π÷12. The trapezoidal dimension parameters are m = 5.01, n = 11.46, h = 12.03 respectively. Among them, the tooth body 116, the slot opening and the slot bottom have insulating parts 140, and the rectangular wires 132 are neatly arranged along each part of the insulating parts 140, and the total number of arranged conductors N = 23.

[0129] Example 15:

[0130] As Figure 5 、 Figure 6 and Figure 7 shown, for the stator structure 100 provided by an embodiment of the present invention, the slot shape of the stator slot 120 is equivalent to a trapezoid. Among them, β1 = 5π÷12 = π÷2 - π÷Z1, the slot bottom is a sharp-angle trapezoid, β2 = 4π÷9 > π÷2 - π÷Z1,

[0131] when the slot bottom is a round-bottom trapezoid, β3 = π÷2 > π÷2 - π÷Z1. When the rectangular wire 132 adopts x = y = 2mm, and then N = 9 is formed for both the sharp-angle trapezoid and the round-bottom trapezoid, which is greater than N = 8 for the flat-bottom trapezoid. Further, the increase in the number of turns can be achieved.

[0132] Example 16:

[0133] As Figure 8As shown, the stator structure 100 provided by an embodiment of the present invention has the same slot structure as that of Embodiment 16, that is, t1 is equal to t2, the slot type matches the winding 130, β = π÷2 - π÷Z1 = 5π÷12, and the conductor uses x = 1.6 mm and y = 1.03 mm.

[0134] As Figure 11 shown, specifically, when the number of turns N = 18 is the same, the related art uses round wires. When using round wires for the concentrated winding 130, in addition to the stator slots 120 not being able to completely cover, there are also gaps between the round wires. Therefore, the slot fill factor of the actual copper conductor is not high, only 46.70%, the copper loss is close to 18 W, and the efficiency is 91.91%. In this embodiment, when using flat wires 132, the slot fill factor reaches 49.10%, the copper loss is slightly higher than 16 W, and the efficiency is 92.20%. The slot fill factor of the motor increases and the copper loss decreases, resulting in a 0.3% increase in the motor efficiency.

[0135] Among them, the winding 130 has three layers of flat wires 132. The number of flat wires 132 in the layer close to the stator teeth 114 to the number of flat wires 132 in the layer far from the stator teeth 114 is 7, 6, and 5 in sequence.

[0136] Embodiment 17:

[0137] As Figure 9 shown, the stator structure 100 provided by an embodiment of the present invention has the same slot structure as that of Embodiment 16, that is, t1 is equal to t2, the slot type matches the winding 130, β = π÷2 - π÷Z1 = 5π÷12, and the conductor uses x = 2.9 mm and y = 0.8 mm.

[0138] As Figure 11 shown, when the number of turns N = 18 is the same, the related art uses round wires. When using round wires for the concentrated winding 130, in addition to the stator slots 120 not being able to completely cover, there are also gaps between the round wires. Therefore, the slot fill factor of the actual copper conductor is not high, only 46.70%, the copper loss is close to 18 W, and the efficiency is 91.91%. In this embodiment, based on Embodiment 16, the x and y dimensions of the flat wires 132 are optimized and improved. The slot fill factor reaches 68.90%, the copper is less than 12 W, and the efficiency is 93.90%. The slot fill factor of the motor increases and the copper loss further decreases, resulting in a 2% increase in the motor efficiency.

[0139] Among them, the winding 130 has six layers of flat wires 132. The number of flat wires 132 in the layer close to the stator teeth 114 to the number of flat wires 132 in the layer far from the stator teeth 114 is 4, 4, 4, 3, 2, and 1 in sequence.

[0140] Embodiment 18:

[0141] As Figure 10As shown, for the stator structure 100 provided by an embodiment of the present invention, t1 is not equal to t2, the slot shape matches the winding 130, β = π÷2 - π÷Z1 = 5π÷12. In this embodiment, the stator teeth 114 adopt an unequal-width structure, with m = 6.15 mm, n = 10.40 mm, h = 12.03 mm, t1 = 2.92 mm, and t2 = 4.09 mm, satisfying 1.5×t1 ≥ t2 ≥ t1. The slot area is the same as that of Embodiment 16, Embodiment 18, and Embodiment 19, with x = 1.49 mm and y = 1.53 mm.

[0142] As Figure 11 shown, specifically, when the number of turns N = 18 is the same, the related art uses round wires. When using round wires for the concentrated winding 130, in addition to the stator slots 120 not being able to fully cover, there are also gaps between the round wires. Therefore, the slot fill factor of the actual copper conductor is not high, only 46.7%, the copper loss is close to 18 W, and the efficiency is 91.91%. Based on Embodiment 17, this embodiment adopts the unequal-width structure of the stator teeth 114, reducing the number of layers of the flat wires 132 to 3 layers, which is more conducive to winding. The slot fill factor reaches 69.90%, the copper loss is less than 12 W, and the efficiency is 93.90%. The slot fill factor of the motor increases, and the copper loss further decreases, resulting in a 2% increase in the motor efficiency.

[0143] Among them, the winding 130 has three layers of flat wires 132. The number of flat wires 132 in the layer close to the stator teeth 114 to the number of flat wires 132 in the layer far from the stator teeth 114 is 8, 8, and 2 in sequence.

[0144] Embodiment 19:

[0145] The present invention provides a motor, including: a rotor structure; the stator structure 100 provided by any of the above embodiments.

[0146] The motor proposed by the present invention includes the stator structure 100 provided by any of the above embodiments. Therefore, it has all the beneficial effects of the stator structure 100 provided by any of the above embodiments, which will not be elaborated here one by one.

[0147] Embodiment 20:

[0148] The present invention provides an electrical equipment, including: the motor provided by any of the above embodiments.

[0149] The electrical equipment provided by the present invention includes the motor provided by any of the above embodiments. Therefore, it has all the beneficial effects of the motor provided by any of the above embodiments, which will not be elaborated here one by one.

[0150] In the present invention, the terms "first", "second", and "third" are used only for descriptive purposes and should not be construed as indicating or implying relative importance; the term "plural" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0151] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0152] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0153] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A stator structure, It is characterized in that include: A stator core, the stator core comprising a stator yoke and a plurality of stator teeth, the plurality of stator teeth being arranged on the stator yoke, a stator slot being formed between adjacent stator teeth, the stator teeth comprising: a tooth body and a tooth shoe, the tooth body being arranged on the stator yoke, and the tooth shoe being arranged on the tooth body; A winding is provided on the stator teeth, the winding includes flat wires wound on the stator teeth in a concentrated manner, the flat wires are wound on the stator teeth in multiple layers, and the number of flat wires in a layer of the winding away from the stator teeth is no more than the number of flat wires in a layer of the winding close to the stator teeth. Wherein, the width of the tooth body on a side close to the tooth shoe is 2×t1, the width of the tooth body on a side close to the stator yoke is 2×t2, and 1.5×t1≥t2≥t1; The side of the stator yoke facing the stator teeth, and the portion between the adjacent stator teeth is the bottom wall of the stator slot, and the side of the stator teeth facing the stator slot is the side wall of the stator slot, The length of the cross section of the flat wire is x, the width is y, the straight-line distance between the ends of the two side walls facing the bottom wall is n, the straight-line distance between the ends of the two side walls away from the bottom wall is m, and the distance between the two ends of the side wall along the radial direction of the stator core is h. Where, 0.25×h÷m <x÷y<6×h÷n; The winding structure on each stator tooth is the same.

2. The stator structure according to claim 1, It is characterized in that Along the radial direction of the stator core, adjacent flat wires are in contact with each other.

3. The stator structure according to claim 1, It is characterized in that Along the circumferential direction of the stator core, adjacent flat wires are in contact with each other.

4. The stator structure according to claim 1, It is characterized in that The stator teeth are trapezoidal stator teeth or parallel stator teeth.

5. The stator structure according to claim 1, It is characterized in that The bottom wall is a plane, a curved surface, a combination of multiple planes, a combination of multiple curved surfaces, or a combination of multiple curved surfaces and planes.

6. The stator structure according to claim 5, It is characterized in that The bottom wall is a plane, and the angle β between the bottom wall and the side wall is ≥π÷2-π÷Z1, Wherein, Z1 is the number of stator teeth.

7. The stator structure according to claim 5, It is characterized in that The bottom wall is a curved surface, and the angle β between the side wall and the tangent line passing through the intersection of the bottom wall and the side wall is ≥π÷2-π÷Z1, Wherein, Z1 is the number of stator teeth.

8. The stator structure according to any one of claims 1 to 4, It is characterized in that The numbers of the flat wires of different windings in the same stator slot are the same.

9. The stator structure according to any one of claims 1 to 4, It is characterized in that An insulating member is arranged between the stator core and the winding.

10. The stator structure according to any one of claims 1 to 4, It is characterized in that The flat wire comprises: wire; The insulating layer is arranged outside the conductive wire.

11. A motor, It is characterized in that include: Rotor structure; The stator structure according to any one of claims 1 to 10 above.

12. An electrical device, characterized in that it comprises: a motor according to claim 11.

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