Stator core, stator assembly, motor and aircraft

Abstract

The utility model discloses a stator core, a stator assembly, a motor and an aircraft, the stator core comprises a plurality of T-shaped teeth, a stator slot is defined between two adjacent stator teeth, each stator tooth comprises a stator yoke part, a stator tooth part and a stator tooth crest, the stator tooth part extends along the radial direction of the stator core, the stator yoke part is connected to the radial inner end of the stator tooth part, and the stator tooth crest is connected to the stator yoke part. The stator tooth crests are connected to the radial outer ends of the stator tooth parts, the stator yoke parts of every two adjacent stator teeth are connected, and the stator tooth crests and the stator tooth parts are formed independently. According to the stator core provided by the embodiment of the utility model, the stator winding can be conveniently assembled to the stator tooth part through the radial outer end opening of the stator slot, and the slot fullness rate of the stator core can be improved, so that the power density of the motor is improved, and the output performance of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a stator core, a stator assembly, a motor and an aircraft. Background Art

[0002] In the related art, the stator core is formed by connecting a plurality of independent stator teeth, and the stator teeth include a stator tooth portion, a stator yoke portion and a stator tooth top. However, the width of the stator tooth top in the circumferential direction of the stator core is relatively large, so that the distance between the radial outer ends of adjacent stator teeth is relatively small, which makes it difficult to assemble the stator winding on the stator core, resulting in a low slot fill rate of the stator core, affecting the output performance of the motor. Therefore, this problem needs to be solved. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a stator core, wherein the stator tooth tops and the stator tooth portions are independently formed, so that the stator tooth tops can be easily manufactured, and the radial outer end openings of the stator slots between adjacent stator teeth are relatively large, so that the stator windings can be easily assembled to the stator tooth portions through the radial outer end openings of the stator slots, and more stator windings can be accommodated in the stator slots, so that the slot fill rate of the stator core can be improved, thereby improving the power density of the motor, thereby improving the output performance of the motor.

[0004] The utility model provides a stator component with the stator core.

[0005] The utility model provides a motor with the stator assembly.

[0006] The utility model also provides an aircraft with the motor.

[0007] According to the stator core of the embodiment of the first aspect of the utility model, it includes: a plurality of stator teeth, a stator slot is defined between two adjacent stator teeth, the stator teeth include a stator yoke portion, a stator tooth portion and a stator tooth top, the stator tooth portion extends radially along the stator core, the stator yoke portion is connected to the radial inner end of the stator tooth portion, the stator tooth top is connected to the radial outer end of the stator tooth portion, and the stator yoke portions of two adjacent stator teeth are connected; wherein the stator tooth top and the stator tooth portion are independently formed respectively.

[0008] According to the stator core of the embodiment of the utility model, the stator tooth tops and the stator tooth parts are independently formed, so that the stator tooth tops can be easily manufactured, and the radial outer end openings of the stator slots between adjacent stator teeth are larger, which can facilitate the stator winding to be assembled to the stator tooth parts through the radial outer end openings of the stator slots, and can also accommodate more stator windings in the stator slots, which can improve the slot fill rate of the stator core, thereby improving the power density of the motor, thereby improving the output performance of the motor.

[0009] According to some embodiments of the present invention, the stator yokes of all the stator teeth are integrally formed, and the stator yokes and the stator teeth are integrally formed.

[0010] According to some embodiments of the present invention, the stator tooth top is connected to the stator tooth portion by snap-fitting.

[0011] According to some embodiments of the present invention, the stator tooth top and the stator tooth portion are further connected via an adhesive layer.

[0012] According to some embodiments of the present invention, the radial outer end of the stator tooth portion constitutes a connecting end, and a mounting groove is formed on the radial inner side of the stator tooth top, and the connecting end is accommodated in the mounting groove.

[0013] According to some embodiments of the present invention, the connecting end and the assembly groove have a transition or interference fit.

[0014] According to some embodiments of the present invention, the length of the assembly slot in the circumferential direction of the stator core is L1, and the width of the assembly slot in the radial direction of the stator core is W1, and L1 and W1 satisfy: 4≤L1 / W1≤8.

[0015] According to some embodiments of the present invention, the length of the assembly groove in the circumferential direction of the stator core is L1, and the length of the stator tooth top in the circumferential direction of the stator core is L2, and L1 and L2 satisfy: 0.45≤L1 / L2≤0.68.

[0016] According to some embodiments of the present invention, the width of the assembly groove in the radial direction of the stator core is W1, and the width of the stator tooth top in the radial direction of the stator core is W2, and W1 and W2 satisfy: 0.45≤W1 / W2≤0.55.

[0017] According to some embodiments of the present invention, W1 / W2=0.5.

[0018] According to some embodiments of the utility model, first limiting grooves are respectively formed on both circumferential sides of the connecting end, the connecting end includes a limiting portion, the limiting portion is located on the radially outer side of the first limiting groove and the radially inner side of the limiting portion faces the first limiting groove, an assembly groove is formed on the radially inner side of the stator tooth top, the assembly groove has two groove side walls arranged opposite to each other in the circumferential direction, both of the two groove side walls of the assembly groove are provided with limiting protrusions and the limiting protrusions are adjacent to the opening side of the assembly groove, the assembly groove also has a groove bottom wall, the two groove side walls are connected on both sides of the groove bottom wall in the circumferential direction, the limiting protrusion is spaced apart from the groove bottom wall and defines a second limiting groove, the limiting protrusion is accommodated in the first limiting groove, and the limiting portion is accommodated in the second limiting groove.

[0019] According to some embodiments of the present invention, the width of the limiting protrusion in the radial direction of the stator core is W3, the width of the second limiting groove in the radial direction of the stator core is W4, and W3 and W4 satisfy: 0.9≤W3 / W4≤1.1.

[0020] According to some embodiments of the present invention, W3 / W4=1.

[0021] According to some embodiments of the present invention, the width of the limiting protrusion in the radial direction of the stator core is W3, and the length of the limiting protrusion in the circumferential direction of the stator core is L3, L3=K*W3, and the value range of K is 1 to 1.5.

[0022] According to some embodiments of the present invention, the stator core includes a plurality of stator sheets stacked along the axial direction of the stator core, and each of the stator sheets includes a plurality of stator teeth.

[0023] The stator assembly according to the second aspect of the present invention comprises: the stator core according to the first aspect; and a stator winding wound around the stator teeth and partially located in the stator slots.

[0024] According to the stator assembly of the embodiment of the utility model, by providing the above-mentioned stator core, the stator tooth tops and the stator tooth parts of the stator core are independently formed, respectively, so that the stator tooth tops can be easily manufactured, and the radial outer end openings of the stator slots between adjacent stator teeth are relatively large, which can facilitate the stator winding to be assembled to the stator tooth parts through the radial outer end openings of the stator slots, and can also accommodate more stator windings in the stator slots, which can improve the slot fill rate of the stator core, thereby improving the power density of the motor, thereby improving the output performance of the motor.

[0025] The motor according to the third aspect of the present invention includes: the stator assembly according to the second aspect of the present invention.

[0026] According to the motor of the embodiment of the utility model, by setting the above-mentioned stator assembly, the stator assembly includes a stator core, and the stator tooth tops and stator tooth parts of the stator core are independently formed, so that the stator tooth tops can be easily manufactured, and the radial outer end openings of the stator slots between adjacent stator teeth are relatively large, which can facilitate the stator winding to be assembled to the stator tooth parts through the radial outer end openings of the stator slots, and can also accommodate more stator windings in the stator slots, which can improve the slot fill rate of the stator core, thereby improving the power density of the motor, thereby improving the output performance of the motor.

[0027] An aircraft according to a fourth embodiment of the present invention includes: a motor according to the above-mentioned third embodiment.

[0028] According to the aircraft of the embodiment of the utility model, by setting the above-mentioned motor, the motor includes a stator assembly, the stator assembly includes a stator core, the stator tooth tops and the stator tooth parts of the stator core are independently formed, so that the stator tooth tops can be easily manufactured, and the radial outer end openings of the stator slots between adjacent stator teeth are relatively large, which can facilitate the stator winding to be assembled to the stator tooth parts through the radial outer end openings of the stator slots, and can also accommodate more stator windings in the stator slots, which can improve the slot fill rate of the stator core, thereby improving the power density of the motor, thereby improving the output performance of the motor and the aircraft.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 is a schematic diagram of a stator assembly according to some embodiments of the present invention;

[0032] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0033] Figure 3 yes Figure 1 A schematic diagram of a partial structure of a stator core in a stator assembly;

[0034] Figure 4 yes Figure 3 The enlarged view of point B in the middle;

[0035] Figure 5 yes Figure 1 Schematic diagram of the stator tooth tops in the stator core in the stator assembly.

[0036] Reference numerals:

[0037] 100. stator assembly;

[0038] 1. stator core; 11. stator teeth; 111. stator yoke; 112. stator teeth; 113. stator tooth top; 114. connection end; 115. assembly groove; 116. first limiting groove; 117. limiting part; 118. groove side wall; 119. limiting protrusion; 120. groove bottom wall; 121. second limiting groove; 13. stator slot; 14. center hole;

[0039] 2. Stator winding. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] Reference below Figure 1-Figure 5 A stator core 1 according to an embodiment of the present invention is described.

[0042] Reference Figure 2 , Figure 3 and Figure 5 According to the stator core 1 of the first embodiment of the utility model, a plurality of stator teeth 11 are included, and a stator slot 13 is defined between two adjacent stator teeth 11. For example, the stator assembly 100 includes a stator winding 2 and a stator core 1, and the stator winding 2 is arranged in the stator slot 13. The stator slot 13 can facilitate the assembly of the stator winding 2 on the stator core 1, and can make the overall structure of the stator winding 2 and the stator core 1 compact.

[0043] The stator teeth 11 include a stator yoke 111, a stator tooth 112 and a stator tooth top 113. The stator tooth 112 extends radially along the stator core 1. The stator yoke 111 is connected to the radial inner end of the stator tooth 112. The stator tooth top 113 is connected to the radial outer end of the stator tooth 112. The stator yoke 111 of two adjacent stator teeth 11 is connected. The stator tooth 112 is used for assembly with the stator tooth top 113 to achieve fixed connection of the stator tooth top 113 to the stator tooth 112. The stator yoke 111 of two adjacent stator teeth 11 is connected, so that the magnetic circuit of the entire stator core 1 can be continuously transmitted between each stator tooth 11.

[0044] The stator tooth top 113 and the stator tooth portion 112 are formed independently, which can make the manufacture of the stator tooth top 113 more convenient. For example, the stator tooth top 113 can be stamped or wire-cut using materials such as silicon steel sheets, and then stacked to form the stator tooth top 113.

[0045] Moreover, the stator tooth top 113 and the stator tooth portion 112 are formed independently, and the stator tooth top 113 can be installed on the stator tooth portion 112 after the stator winding 2 is first assembled on the stator tooth portion 112, so that the stator slots 13 between adjacent stator tooth portions 112 are open along the radial direction of the stator core 1 and the opening between the radial outer ends of adjacent stator teeth 11 is larger, which can facilitate the stator winding 2 to be wound on the stator tooth portion 112 through the opening of the radial outer end of the stator slot 13 along the radial direction of the stator core 1, and more stator windings 2 can be wound on the stator tooth portion 112, so that the slot fill rate in the stator slot 13 can be improved, thereby improving the power density and torque of the motor, reducing the resistance of the motor, and effectively improving the magnetic saturation problem of the motor, thereby improving the output performance of the motor.

[0046] For example, the stator assembly 100 includes insulating paper, a stator winding 2 and a stator core 1, the insulating paper is arranged between the stator winding 2 and the stator tooth portion 112, the stator winding 2 can be a pre-wound stator winding 2, or it can be directly wound on the stator tooth portion 112, and the assembly process of the stator winding 2 on the stator core 1 can be: placing the insulating paper on the stator tooth portion 112, assembling the stator winding 2 on the stator tooth portion 112 along the radial direction of the stator core 1, and making the insulating paper located between the stator winding 2 and the stator tooth portion 112, and then installing the stator tooth top 113 on the stator tooth portion 112 along the radial direction of the stator core 1.

[0047] By forming the stator tooth top 113 and the stator tooth portion 112 independently, the manufacture of the stator tooth top 113 can be made more convenient; and, the stator winding 2 can be first assembled on the stator tooth portion 112, and then the stator tooth top 113 can be installed on the stator tooth portion 112, so that the stator slots 13 between adjacent stator tooth portions 112 are open in the radial direction of the stator core 1 and the openings of the stator slots 13 along the radial outer ends of the stator core 1 are larger, which can facilitate the stator winding 2 to be wound on the stator tooth portion 112 through the openings of the radial outer ends of the stator slots 13 along the radial direction of the stator core 1, and more stator windings 2 can be wound on the stator tooth portion 112, so that the slot fill rate in the stator slot 13 can be improved, thereby improving the power density and torque of the motor, reducing the resistance of the motor, and effectively improving the magnetic saturation problem of the motor, thereby improving the output performance of the motor.

[0048] In the description of the present invention, "plurality" means two or more.

[0049] According to the stator core 1 of the embodiment of the utility model, the stator tooth top 113 and the stator tooth portion 112 are independently formed, so that the stator tooth top 113 can be easy to manufacture, and the radial outer end opening of the stator slot 13 between adjacent stator teeth 11 is larger, which can facilitate the stator winding 2 to be assembled to the stator tooth portion 112 through the radial outer end opening of the stator slot 13, and can also accommodate more stator windings 2 in the stator slot 13, which can improve the slot fill rate of the stator core 1, thereby improving the power density of the motor, thereby improving the output performance of the motor.

[0050] Reference Figure 3 The stator yokes 111 of all stator teeth 11 are integrally formed, the stator yokes 111 and the stator teeth 112 are integrally formed, and the stator tooth tops 113 and the stator teeth 112 are independently formed. The stator yokes 111 of all stator teeth 11 are integrally formed, which can improve the overall structural strength of the stator core 1 and save the assembly process between multiple stator teeth 11; and the stator yokes 111 of all stator teeth 11 are integrally formed, which can reduce the magnetic resistance between adjacent stator yokes 111, thereby improving the output performance of the motor.

[0051] For example, when a plurality of independent stator teeth 11 are connected to form a stator core 1, in order to facilitate assembly of the plurality of independent stator teeth 11, a certain assembly error may exist between the stator yokes 111 of adjacent stator teeth 11. The assembly error may easily lead to a certain gap between adjacent stator yokes 111 and magnetic resistance in the gap. The magnetic resistance may reduce the output performance of the motor.

[0052] The stator yoke 111 and the stator teeth 112 are integrally formed, which can improve the overall structural strength of the stator teeth 11 and save the assembly process between the stator yoke 111 and the stator teeth 112 .

[0053] All stator teeth 11 are integrally formed, and the stator yoke 111 and the stator tooth 112 are integrally formed, which can enhance the overall structural strength of the stator core 1 and the overall structural stability of the stator core 1. For example, when a plurality of independent stator teeth 11 are connected to form the stator core 1, the plurality of independent stator teeth 11 are heavy, resulting in a heavy weight of the stator core 1 as a whole. The vibration generated when the motor is working can easily deform the stator core 1 or cause the stator core 1 to vibrate greatly and separate the stator teeth 11. By integrally forming all stator teeth 11 and the stator yoke 111 and the stator tooth 112, the structural stability of the stator core 1 and the structural strength of the stator core 1 during the operation of the motor can be improved, and the possibility of the vibration generated when the motor is working causing the stator core 1 to deform or the stator teeth 11 to separate can be reduced.

[0054] In addition, on the basis that the stator tooth tops 113 and the stator tooth portions 112 are independently formed, all the stator teeth 11 are formed as one piece, and the stator yoke portion 111 and the stator tooth portion 112 are formed as one piece, which is beneficial to uniform distribution of air gaps between multiple stator tooth tops 113, thereby improving the output performance of the motor.

[0055] For example, when multiple independent stator teeth 11 are connected to form a stator core 1, in order to facilitate the assembly of all stator teeth 11, there may be a certain assembly error between the stator yokes 111 of the stator teeth 11. The assembly error causes a certain gap between adjacent stator yokes 111. The gap between all stator yokes 111 may cause the stator core 1 to shift as a whole, which in turn causes the stator tooth top 113 connected to the radial outer end of the stator tooth 112 to shift more greatly, resulting in uneven distribution of air gaps between multiple stator tooth tops 113, thereby affecting the output performance of the motor. By integrally forming all stator teeth 11, and integrally forming the stator yoke 111 and the stator tooth 112, the air gaps between multiple stator tooth tops 113 can be evenly distributed, which is beneficial to improving the output performance of the motor. Figure 2 According to some embodiments of the present invention, the stator tooth top 113 is snap-connected with the stator tooth portion 112, which can make the connection between the stator tooth top 113 and the stator tooth portion 112 simple and have strong stability, and facilitate the disassembly or assembly between the stator tooth top 113 and the stator tooth portion 112.

[0056] Reference Figure 2 According to some embodiments of the present invention, the stator tooth top 113 and the stator tooth portion 112 are further connected by an adhesive layer, and the adhesive layer can further enhance the stability of the clamping connection between the stator tooth top 113 and the stator tooth portion 112, thereby further enhancing the overall structural strength of the stator core 1 and reducing the possibility of the stator tooth top 113 falling off due to the vibration generated when the motor is working.

[0057] Reference Figure 4 and Figure 5 According to some embodiments of the present invention, the radial outer end of the stator tooth portion 112 constitutes a connection end 114, and a mounting groove 115 is formed on the radial inner side of the stator tooth top 113, and the connection end 114 is accommodated in the mounting groove 115. The connection end 114 is accommodated in the mounting groove 115, which can make the clamping connection between the stator tooth portion 112 and the stator tooth top 113 more convenient, and can make the overall structure of the stator tooth portion 112 and the stator tooth top 113 compact.

[0058] Reference Figure 4 and Figure 5According to some embodiments of the present invention, the connection end 114 and the assembly groove 115 have a transition or interference fit, which can make the connection between the connection end 114 and the assembly groove 115 simple and have strong stability, thereby making the connection between the stator tooth top 113 and the stator tooth portion 112 simple and have strong stability.

[0059] Optionally, the stator assembly 100 includes insulating paper, a stator winding 2 and a stator core 1, wherein the insulating paper is suitable for being arranged between the stator winding 2 and the stator tooth portion 112 to insulate the stator winding 2 from the stator core 1. The stator core 1 includes a plurality of stator teeth 11, wherein the stator teeth 11 include a stator yoke 111, a stator tooth portion 112 and a stator tooth top 113, wherein the stator tooth portion 112 extends radially along the stator core 1, the stator yoke 111 is connected to the radial inner end of the stator tooth portion 112, the stator tooth top 113 is connected to the radial outer end of the stator tooth portion 112, the stator yoke 111 of two connected stator teeth 11 is connected, the radial outer end of the stator tooth portion 112 constitutes a connecting end 114, the radial inner side of the stator tooth top 113 is formed with an assembly groove 115, and the connecting end 114 is accommodated in the assembly groove 115.

[0060] For example, the assembly process of the stator component 100 can be: placing insulating paper on the stator tooth portion 112, and then assembling the prefabricated stator winding 2 on the stator tooth portion 112 or directly winding the stator winding 2 on the stator tooth portion 112, and making the insulating paper between the stator tooth portion 112 and the stator winding 2, so that the connecting end 114 of the stator tooth portion 112 and the assembly groove 115 of the stator tooth top 113 are transitionally fitted or interference fit, so that the connecting end 114 is accommodated in the assembly groove 115, realizing the snap-fit ​​connection between the stator tooth top 113 and the stator tooth portion 112, and the adhesive layer is used to make the connection between the stator tooth top 113 and the stator tooth portion 112 more stable, thereby completing the assembly process of the stator component 100.

[0061] Reference Figure 5 According to some embodiments of the utility model, the length of the assembly slot 115 in the circumferential direction of the stator core 1 is L1, and the width of the assembly slot 115 in the radial direction of the stator core 1 is W1, and L1 and W1 satisfy: 4≤L1 / W1≤8. For example, L1 / W1 can be 4, 5, 6, 7, 8, etc. By L1 / W1 being not less than 4, the contact area between the assembly slot 115 in the circumferential direction of the stator core 1 and the connection end 114 in the circumferential direction of the stator core 1 can be increased, and the stability of the matching between the assembly slot 115 and the connection end 114 can be enhanced, thereby enhancing the stability of the connection between the stator tooth top 113 and the stator tooth portion 112, and reducing the possibility of the stator tooth top 113 falling off from the stator tooth portion 112 due to the vibration generated by the motor when the motor is working; by L1 / W1 being not greater than 8, the manufacture of the stator tooth top 113 can be made more convenient.

[0062] For example, the length of the assembly slot 115 in the circumferential direction of the stator core 1 is too large, and the width of the assembly slot 115 in the radial direction of the stator core 1 is too small, resulting in high difficulty in manufacturing the stator tooth top 113. By setting L1 / W1 to be not greater than 8, it is possible to avoid the situation where the length of the assembly slot 115 in the circumferential direction of the stator core 1 is too large and the width of the assembly slot 115 in the radial direction of the stator core 1 is too small, thereby reducing the difficulty in manufacturing the stator tooth top 113.

[0063] By ensuring that L1 and W1 satisfy 4≤L1 / W1≤8, the contact area between the assembly slot 115 in the circumferential direction of the stator core 1 and the connection end 114 in the circumferential direction of the stator core 1 can be increased, thereby enhancing the stability of the fit between the assembly slot 115 and the connection end 114, and further enhancing the stability of the connection between the stator tooth top 113 and the stator tooth portion 112, thereby reducing the possibility of the stator tooth top 113 falling off the stator tooth portion 112 due to the vibration generated by the motor when the motor is working; and further, the manufacture of the stator tooth top 113 can be made more convenient.

[0064] Reference Figure 5 According to some embodiments of the present invention, the length of the assembly slot 115 in the circumferential direction of the stator core 1 is L1, the length of the stator tooth top 113 in the circumferential direction of the stator core 1 is L2, and L1 and L2 satisfy: 0.45≤L1 / L2≤0.68.

[0065] For example, L1 / L2 can be 0.45, 0.5, 0.55, 0.6, 0.65, 0.68, etc. When L1 / L2 is not less than 0.45, the contact area between the assembly slot 115 of the stator tooth top 113 and the connecting end 114 of the stator tooth portion 112 can be larger, thereby increasing the stability of the connection between the stator tooth top 113 and the stator tooth portion 112 and reducing the possibility of the stator tooth top 113 falling off due to the vibration generated during the operation of the motor; when L1 / L2 is not greater than 0.68, it can be ensured that the structural strength of the stator tooth top 113 is sufficient, avoiding the low structural strength of the stator tooth top 113 due to the excessive length of the assembly slot 115 in the circumferential direction of the stator core 1, thereby reducing the possibility of deformation of the stator tooth top 113.

[0066] For example, the assembly groove 115 has two groove side walls 118 arranged opposite to each other in the circumferential direction, and the stator tooth top 113 has two side walls arranged opposite to each other in the circumferential direction. The groove side walls 118 are arranged opposite to the side walls, and L1 / L2 is greater than 0.68, which easily makes the length of the assembly groove 115 in the circumferential direction of the stator core 1 too long, so that the length of the part between the groove side walls 118 of the assembly groove 115 and the side walls of the stator tooth top 113 in the circumferential direction of the stator core 1 is too short, resulting in low structural strength of the stator tooth top 113. When the stator tooth top 113 is assembled with the stator tooth portion 112, the stator tooth top 113 is easily deformed.

[0067] By L1 and L2 satisfying 0.45≤L1 / L2≤0.68, the contact area between the assembly slot 115 of the stator tooth top 113 and the connecting end 114 of the stator tooth portion 112 can be made larger, thereby increasing the stability of the connection between the stator tooth top 113 and the stator tooth portion 112 and reducing the possibility of the stator tooth top 113 falling off due to the vibration generated during the operation of the motor; and, it can ensure that the structural strength of the stator tooth top 113 is sufficient, avoiding the low structural strength of the stator tooth top 113 due to the excessive length of the assembly slot 115 in the circumferential direction of the stator core 1, thereby reducing the possibility of deformation of the stator tooth top 113.

[0068] Reference Figure 5 According to some embodiments of the utility model, the width of the assembly slot 115 in the radial direction of the stator core 1 is W1, and the width of the stator tooth top 113 in the radial direction of the stator core 1 is W2, and W1 and W2 satisfy: 0.45≤W1 / W2≤0.55. For example, W1 / W2 can be 0.45, 0.48, 0.5, 0.53, 0.55, etc. By W1 / W2 being not less than 0.45, it can be ensured that the width of the assembly slot 115 in the radial direction of the stator core 1 is sufficient, making the manufacture of the stator tooth top 113 more convenient; by W1 / W2 being not greater than 0.55, it can be ensured that the structural strength of the stator tooth top 113 is sufficient, avoiding the possibility of low structural strength of the stator tooth top 113 due to the excessive width of the assembly slot 115 in the radial direction of the stator core 1, thereby causing deformation of the stator tooth top 113, and reducing the possibility of excessive magnetic saturation at the assembly slot 115, which is beneficial to improving the output performance of the motor.

[0069] For example, when W1 / W2 is less than 0.45, the width of the assembly slot 115 in the radial direction of the stator core 1 may be too small, making the manufacturing of the stator tooth top 113 difficult. When W1 / W2 is not less than 0.45, the width of the assembly slot 115 in the radial direction of the stator core 1 may be sufficient, which facilitates the demolding of the stator tooth top 113.

[0070] For another example, the assembly slot 115 has a slot bottom wall 120, which extends in the circumferential direction of the stator tooth top 113, and the stator tooth top 113 has a bottom wall, which extends in the circumferential direction of the stator tooth top 113, and the slot bottom wall 120 is arranged opposite to the bottom wall. When W1 / W2 is greater than 0.55, it is easy for the width of the assembly slot 115 in the radial direction of the stator core 1 to be too large, and the width of the part between the slot bottom wall 120 and the bottom wall in the radial direction of the stator core 1 to be too small, thereby reducing the structural strength of the stator tooth top 113 and causing the stator tooth top 113 to be easily deformed; and, during the operation of the motor, the excessive width of the assembly slot 115 in the radial direction of the stator core 1 may cause excessive magnetic saturation at the assembly slot 115, resulting in excessive magnetic resistance at the assembly slot 115, thereby affecting the output performance of the motor.

[0071] By ensuring that W1 / W2 is not greater than 0.55, it can be ensured that the structural strength of the stator tooth top 113 is sufficient, avoiding the possibility of deformation of the stator tooth top 113 due to a reduction in the structural strength of the stator tooth top 113 caused by the large width of the assembly slot 115 in the radial direction of the stator core 1. The possibility of excessive magnetic saturation at the assembly slot 115 can also be reduced, which is beneficial to improving the output performance of the motor.

[0072] By W1 and W2 satisfying 0.45≤W1 / W2≤0.55, it can be ensured that the width of the assembly slot 115 in the radial direction of the stator core 1 is sufficient, making the manufacture of the stator tooth top 113 more convenient; and it can be ensured that the structural strength of the stator tooth top 113 is sufficient, avoiding the possibility of low structural strength of the stator tooth top 113 due to the excessive width of the assembly slot 115 in the radial direction of the stator core 1, thereby causing deformation of the stator tooth top 113, and reducing the possibility of excessive magnetic saturation at the assembly slot 115, which is beneficial to improving the output performance of the motor.

[0073] Reference Figure 5 According to some embodiments of the present invention, W1 / W2=0.5, so that the width of the assembly slot 115 in the radial direction of the stator core 1 is half of the width of the stator tooth top 113 in the radial direction of the stator core 1, which can make the manufacture of the stator tooth top 113 more convenient; and, it can avoid the possibility that the width of the assembly slot 115 in the radial direction of the stator core 1 is too large, which makes the structural strength of the stator tooth top 113 low, and further causes the possibility of deformation of the stator tooth top 113, and can also reduce the possibility of excessive magnetic saturation at the assembly slot 115, which is beneficial to improving the output performance of the motor.

[0074] Reference Figure 4 and Figure 5According to some embodiments of the present invention, first limiting grooves 116 are formed on both sides of the circumferential direction of the connection end 114, and the connection end 114 includes a limiting portion 117, the limiting portion 117 is located on the radial outer side of the first limiting groove 116, and the radial inner side of the limiting portion 117 faces the first limiting groove 116, and a mounting groove 115 is formed on the radial inner side of the stator tooth top 113, and the mounting groove 115 has two groove side walls 118 arranged opposite to each other along the circumferential direction, and the two groove side walls of the mounting groove 115 118 are each provided with a limiting protrusion 119 and the limiting protrusion 119 is adjacent to the opening side of the assembly groove 115, the assembly groove 115 also has a groove bottom wall 120, the two groove side walls 118 are connected to the two sides of the groove bottom wall 120 in the circumferential direction, the limiting protrusion 119 is spaced apart from the groove bottom wall 120 and the limiting protrusion 119 and the groove bottom wall 120 define a second limiting groove 121, the limiting protrusion 119 is accommodated in the first limiting groove 116, and the limiting portion 117 is accommodated in the second limiting groove 121.

[0075] Both the limiting protrusion 119 and the limiting portion 117 can play a limiting role in the assembly between the stator tooth top 113 and the stator tooth portion 112, ensuring that the assembly position of the stator tooth top 113 and the stator tooth portion 112 is accurate; the first limiting groove 116 and the second limiting groove 121 can both facilitate the assembly between the stator tooth top 113 and the stator tooth portion 112, and can make the overall structure of the stator tooth top 113 and the stator tooth portion 112 compact; the limiting portion 117 is located on the radial outer side of the first limiting groove 116, which can facilitate the limiting portion 117 to be inserted into the second limiting groove 121 along the radial direction of the stator core 1; the limiting protrusion 119 is adjacent to the opening side of the assembly groove 115, which can facilitate the limiting protrusion 119 to be inserted into the first limiting groove 116 along the radial direction of the stator core 1, thereby facilitating the connection between the connecting end 114 and the assembly groove 115.

[0076] By accommodating the limiting protrusion 119 in the first limiting groove 116 and the limiting portion 117 in the second limiting groove 121, a snap-fit ​​connection between the assembly groove 115 of the stator tooth top 113 and the connecting end 114 of the stator tooth portion 112 can be achieved, and the stability of the connection between the stator tooth top 113 and the stator tooth portion 112 can be enhanced, thereby enhancing the overall structural strength of the stator core 1.

[0077] Reference Figure 5According to some embodiments of the present invention, the width of the limiting protrusion 119 in the radial direction of the stator core 1 is W3, and the width of the second limiting groove 121 in the radial direction of the stator core 1 is W4, and W3 and W4 satisfy: 0.9≤W3 / W4≤1.1. For example, W3 / W4 can be 0.9, 0.95, 1.0, 1.05, 1.1, etc. By ensuring that W3 / W4 is not less than 0.9, it is possible to avoid the situation where the width of the limiting protrusion 119 in the radial direction of the stator core 1 is too small, resulting in excessive magnetic saturation at the limiting protrusion 119, and the magnetic resistance caused by excessive magnetic saturation can be reduced, thereby improving the output performance of the motor, and it can ensure that the structural strength of the limiting protrusion 119 is sufficient, reducing the possibility of deformation of the limiting protrusion 119; by ensuring that W3 / W4 is not greater than 1.1, it is possible to avoid the situation where the width of the second limiting groove 121 in the radial direction of the stator core 1 is too small, resulting in excessive magnetic saturation at the second limiting groove 121, and the magnetic resistance caused by excessive magnetic saturation can be reduced, thereby improving the output performance of the motor.

[0078] For example, if W3 / W4 is less than 0.9, the width of the limiting protrusion 119 in the radial direction of the stator core 1 may be too small, resulting in low structural strength of the limiting protrusion 119. For example, when the limiting protrusion 119 is assembled with the first limiting groove 116, the limiting protrusion 119 is easily deformed. If W3 / W4 is not less than 0.9, it can be ensured that the structural strength of the limiting protrusion 119 is sufficient, thereby reducing the possibility of deformation of the limiting protrusion 119.

[0079] By satisfying the condition that W3 and W4 satisfy: 0.9≤W3 / W4≤1.1, it is possible to avoid the situation where the width of the limiting protrusion 119 in the radial direction of the stator core 1 is too small, resulting in excessive magnetic saturation at the limiting protrusion 119, and the magnetic resistance caused by excessive magnetic saturation can be reduced, thereby improving the output performance of the motor, and it can be ensured that the structural strength of the limiting protrusion 119 is sufficient to reduce the possibility of deformation of the limiting protrusion 119; and it is possible to avoid the situation where the width of the limiting protrusion 119 in the radial direction of the stator core 1 is too small or the width of the second limiting groove 121 in the radial direction of the stator core 1 is too small, resulting in excessive magnetic saturation at the limiting protrusion 119 or the second limiting groove 121, and the magnetic resistance caused by excessive magnetic saturation can be reduced, thereby improving the output performance of the motor.

[0080] Reference Figure 5According to some embodiments of the utility model, W3 / W4=1, so that the widths of the limiting protrusion 119 and the second limiting groove 121 in the radial direction of the stator core 1 are consistent, which can facilitate the manufacturing and demolding of the stator tooth top 113; and, the possibility of excessive magnetic saturation at the limiting protrusion 119 or the second limiting groove 121 of the stator tooth top 113 during the operation of the motor can be reduced, thereby reducing the magnetic resistance caused by excessive magnetic saturation at the limiting protrusion 119 or the second limiting groove 121 of the stator tooth top 113 during the operation of the motor, which is beneficial to improving the output performance of the motor.

[0081] Reference Figure 5 According to some embodiments of the present invention, the width of the limiting protrusion 119 in the radial direction of the stator core 1 is W3, and the length of the limiting protrusion 119 in the circumferential direction of the stator core 1 is L3, L3 = K*W3, and the value range of K is 1 to 1.5. For example, K can be 1, 1.1, 1.2, 1.3, 1.4, 1.5, etc. By taking a value of K not less than 1, the length of the limiting protrusion 119 in the circumferential direction of the stator core 1 can be sufficient, so that the contact area between the limiting protrusion 119 in the circumferential direction of the stator core 1 and the first limiting groove 116 in the circumferential direction of the stator core 1 is sufficient, thereby ensuring the stability of the cooperation between the limiting protrusion 119 and the first limiting groove 116; by taking a value of K not greater than 1.5, it can be ensured that the structural strength of the limiting protrusion 119 is sufficient, and the possibility of deformation of the limiting protrusion 119 is reduced. It can also reduce the possibility of excessive magnetic saturation of the stator tooth top 113 and the stator tooth portion 112 during the operation of the motor when the limiting protrusion 119 is located in the first limiting groove 116 due to the excessive length of the limiting protrusion 119 in the circumferential direction of the stator core 1. Excessive magnetic saturation may increase the loss during the operation of the motor, thereby reducing the output performance of the motor.

[0082] For example, if the value of K is less than 1, it is easy for the length of the limiting protrusion 119 in the circumferential direction of the stator core 1 to be too short, so that the contact area between the limiting protrusion 119 in the circumferential direction of the stator core 1 and the first limiting groove 116 in the circumferential direction of the stator core 1 is too small, resulting in low stability in the fit between the limiting protrusion 119 and the first limiting groove 116. By setting the value of K to be not less than 1, the length of the limiting protrusion 119 in the circumferential direction of the stator core 1 can be sufficient, so that the contact area between the limiting protrusion 119 in the circumferential direction of the stator core 1 and the first limiting groove 116 in the circumferential direction of the stator core 1 is sufficient, thereby ensuring the stability of the fit between the limiting protrusion 119 and the first limiting groove 116.

[0083] For another example, if the value of K is greater than 1.5, the length of the limiting protrusion 119 in the circumferential direction of the stator core 1 may be too long, resulting in low structural strength of the limiting protrusion 119. When the connecting end 114 of the stator tooth portion 112 is assembled with the assembly groove 115 of the stator tooth top 113, the length of the limiting protrusion 119 in the circumferential direction of the stator core 1 is too long, which may easily cause deformation of the limiting protrusion 119. By setting the value of K to not more than 1.5, the possibility of deformation of the limiting protrusion 119 due to its excessive length in the circumferential direction of the stator core 1 can be reduced.

[0084] By L3=K*W3, where the value range of K is 1 to 1.5, the length of the limiting protrusion 119 in the circumferential direction of the stator core 1 can be sufficient, so that the contact area between the limiting protrusion 119 in the circumferential direction of the stator core 1 and the first limiting groove 116 in the circumferential direction of the stator core 1 is sufficient, thereby ensuring the stability of the cooperation between the limiting protrusion 119 and the first limiting groove 116; and, it can ensure that the structural strength of the limiting protrusion 119 is sufficient, reducing the possibility of deformation of the limiting protrusion 119, and can also reduce the possibility of excessive magnetic saturation of the stator tooth top 113 and the stator tooth portion 112 during the operation of the motor when the limiting protrusion 119 is located in the first limiting groove 116 due to the excessive length of the limiting protrusion 119 in the circumferential direction of the stator core 1. Excessive magnetic saturation may increase the loss during the operation of the motor, thereby reducing the output performance of the motor.

[0085] Reference Figure 3 The stator core 1 includes a plurality of stator sheets stacked axially along the stator core 1, and each stator sheet includes a plurality of stator teeth 11. The manufacture of the stator sheets is relatively convenient, and the plurality of stator sheets stacked axially along the stator core 1 can flexibly adjust the axial size of the stator core 1, so that the stator core 1 meets the requirements of motors of different power levels.

[0086] Optionally, the stator sheets may be silicon steel sheets.

[0087] Reference Figure 1 and Figure 2 According to the second aspect of the present invention, the stator assembly 100 includes a stator core 1 and a stator winding 2 according to the first aspect of the present invention. The stator winding 2 is wound around the stator teeth 112 and partially located in the stator slots 13 .

[0088] According to the stator assembly 100 of the embodiment of the utility model, by providing the above-mentioned stator core 1, the stator tooth top 113 and the stator tooth portion 112 of the stator core 1 are independently formed, so that the stator tooth top 113 can be easily manufactured, and the radial outer end openings of the stator slots 13 between adjacent stator teeth 11 are relatively large, which can facilitate the stator winding 2 to be assembled to the stator tooth portion 112 through the radial outer end openings of the stator slots 13, and can also allow more stator windings 2 to be accommodated in the stator slots 13, which can improve the slot fill rate of the stator core 1, thereby improving the power density of the motor, thereby improving the output performance of the motor.

[0089] Reference Figure 1 and Figure 2 The motor according to the third aspect of the present utility model includes the stator assembly 100 according to the second aspect of the present utility model.

[0090] According to the motor of the embodiment of the utility model, by setting the above-mentioned stator assembly 100, the stator assembly 100 includes a stator core 1, and the stator tooth top 113 and the stator tooth portion 112 of the stator core 1 are independently formed, so that the stator tooth top 113 can be easy to manufacture, and the radial outer end opening of the stator slot 13 between adjacent stator teeth 11 is larger, which can facilitate the stator winding 2 to be assembled to the stator tooth portion 112 through the radial outer end opening of the stator slot 13, and can also make more stator windings 2 accommodated in the stator slot 13, which can improve the slot fill rate of the stator core 1, thereby improving the power density of the motor, thereby improving the output performance of the motor.

[0091] Reference Figure 1 and Figure 2 The aircraft according to the fourth embodiment of the utility model of the present invention comprises a motor according to the above-mentioned third embodiment.

[0092] According to the aircraft of the embodiment of the utility model, by setting the above-mentioned motor, the motor includes a stator assembly 100, and the stator assembly 100 includes a stator core 1. The stator tooth top 113 and the stator tooth portion 112 of the stator core 1 are independently formed, so that the stator tooth top 113 can be easy to manufacture, and the radial outer end opening of the stator slot 13 between adjacent stator teeth 11 is larger, which can facilitate the stator winding 2 to be assembled to the stator tooth portion 112 through the radial outer end opening of the stator slot 13, and can also accommodate more stator windings 2 in the stator slot 13, which can improve the slot fill rate of the stator core 1, thereby improving the power density of the motor, thereby improving the output performance of the motor and the aircraft.

[0093] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0094] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator core, characterized in that: include: A plurality of stator teeth, wherein a stator slot is defined between two adjacent stator teeth, wherein the stator teeth include a stator yoke portion, a stator tooth portion and a stator tooth top, wherein the stator tooth portion extends in the radial direction of the stator core, the stator yoke portion is connected to the radial inner end of the stator tooth portion, the stator tooth top is connected to the radial outer end of the stator tooth portion, and the stator yoke portions of two adjacent stator teeth are connected; Wherein, the stator tooth top and the stator tooth portion are formed independently.

2. The stator core according to claim 1, characterized in that: The stator yokes of all the stator teeth are integrally formed, and the stator yokes and the stator teeth are integrally formed.

3. The stator core according to claim 1, characterized in that: The stator tooth top is connected to the stator tooth portion by clamping.

4. The stator core according to claim 3, characterized in that: The stator tooth top and the stator tooth portion are also connected via an adhesive layer.

5. The stator core according to claim 3, characterized in that: The radial outer end of the stator tooth portion constitutes a connecting end, and a mounting groove is formed on the radial inner side of the stator tooth top, and the connecting end is accommodated in the mounting groove.

6. The stator core according to claim 5, characterized in that: The connecting end and the assembly groove are in transition or interference fit.

7. The stator core according to claim 5, characterized in that: The length of the assembly slot in the circumferential direction of the stator core is L1, and the width of the assembly slot in the radial direction of the stator core is W1. L1 and W1 satisfy: 4≤L1 / W1≤8.

8. The stator core according to claim 5, characterized in that: The length of the assembly groove in the circumferential direction of the stator core is L1, and the length of the stator tooth top in the circumferential direction of the stator core is L2, and L1 and L2 satisfy: 0.45≤L1 / L2≤0.

68.

9. The stator core according to claim 5, characterized in that: The width of the assembly groove in the radial direction of the stator core is W1, and the width of the stator tooth top in the radial direction of the stator core is W2, and W1 and W2 satisfy: 0.45≤W1 / W2≤0.

55.

10. The stator core according to claim 9, characterized in that: W1 / W2=0.

5.

11. The stator core according to claim 5, characterized in that: A first limiting groove is formed on both circumferential sides of the connecting end, the connecting end includes a limiting portion, the limiting portion is located on the radial outer side of the first limiting groove and the radial inner side of the limiting portion faces the first limiting groove, an assembly groove is formed on the radial inner side of the stator tooth top, the assembly groove has two groove side walls arranged opposite to each other in the circumferential direction, both of the two groove side walls of the assembly groove are provided with limiting protrusions and the limiting protrusions are adjacent to the opening side of the assembly groove, the assembly groove also has a groove bottom wall, the two groove side walls are connected on both sides of the groove bottom wall in the circumferential direction, the limiting protrusion is spaced apart from the groove bottom wall and defines a second limiting groove, the limiting protrusion is accommodated in the first limiting groove, and the limiting portion is accommodated in the second limiting groove.

12. The stator core according to claim 11, characterized in that: The width of the limiting protrusion in the radial direction of the stator core is W3, and the width of the second limiting groove in the radial direction of the stator core is W4, and W3 and W4 satisfy: 0.9≤W3 / W4≤1.

1.

13. The stator core according to claim 12, characterized in that: W3 / W4=1.

14. The stator core according to claim 11, characterized in that: The width of the limiting protrusion in the radial direction of the stator core is W3, and the length of the limiting protrusion in the circumferential direction of the stator core is L3, L3=K*W3, and the value range of K is 1-1.

5.

15. The stator core according to any one of claims 1 to 14, characterized in that: The stator core includes a plurality of stator sheets stacked in an axial direction of the stator core, and each of the stator sheets includes a plurality of stator teeth.

16. A stator assembly, characterized in that: include: The stator core according to any one of claims 1 to 15; The stator winding is wound around the stator teeth and partially located in the stator slots.

17. A motor, characterized in that: include: The stator assembly of claim 16.

18. An aircraft, characterized in that: include: A motor as claimed in claim 17.

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