Stator assembly and motor

Abstract

The invention provides a stator assembly and a motor, and particularly relates to the technical field of motors. The stator assembly includes a stator housing, a stator structure, and a heat sink. The stator housing is provided with a first mounting hole. The stator structure is installed on the stator shell, and a second installation hole is formed in the stator structure. The heat dissipation piece comprises a first heat dissipation part and a second heat dissipation part which are connected with each other, the first heat dissipation part is inserted into the first mounting hole, and the second heat dissipation part is inserted into the second mounting hole. Thus, by forming the first mounting hole in the stator shell and forming the second mounting hole in the stator structure, one part of the heat dissipation piece is fixed to the stator shell, and the other part of the heat dissipation piece is fixed to the stator structure, so that a thermal circuit between the stator structure and the stator shell is shortened; the heat generated by the stator structure can be directly conducted to the stator shell by means of the heat dissipation piece, the heat dissipation efficiency is greatly improved, and the safety and stability of motor operation are improved.

Description

Technical Field

[0001] This application relates to the technical field of motors, and in particular, to a stator assembly and a motor. Background Art

[0002] Under the background of the rapid development of transportation electrification and low-altitude economy, the aviation industry has increasingly higher requirements for the performance of motors, among which power density is one of the key measurement indicators. As aviation aircraft develop towards large-scale and long-endurance directions, motors need to achieve higher output power within limited space and weight restrictions, that is, to have higher power density.

[0003] Among them, common cooling methods for high-power density motors include water cooling, forced air cooling, natural cooling, etc., and the cooling methods usually act on the external housing of the motor. And the stator winding of a high-power density motor, as one of the main heat sources, generates heat inside the motor, and the heat needs to be transferred from the internal heat source to the external housing for heat dissipation.

[0004] However, in existing motors, in order to accommodate the cooling system, the motor usually requires additional support structures or stronger materials to ensure the integrity and reliability of the system, thereby increasing the weight, which is not conducive to the lightweight design of the motor. In addition, a large amount of copper loss generated by the stator winding during operation, if not dissipated in time, will cause local overheating of the winding, increase the loss and accelerate the aging of the insulating material, thus seriously threatening the insulation reliability of the motor. Moreover, there are dielectrics between the stator winding and the housing, and these dielectrics have high thermal resistance characteristics, resulting in heat being blocked during the process of transferring from the internal heat source of the motor to the external cooling area, making it difficult for heat to conduct efficiently, and ultimately causing uneven temperature distribution inside the motor and forming a large temperature gradient. Summary of the Invention

[0005] This application provides a stator assembly and a motor. By opening a first mounting hole on the stator housing and a second mounting hole on the stator structure, a part of the heat dissipation member is fixed to the stator housing, and the other part is fixed to the stator structure, shortening the thermal path between the stator structure and the stator housing, enabling the heat generated by the stator structure to be directly conducted to the stator housing through the heat dissipation member, greatly improving the heat dissipation efficiency, and enhancing the safety and stability of the motor operation.

[0006] The first aspect of the embodiments of this application provides a stator assembly, including:

[0007] A stator housing, on which a first mounting hole is provided;

[0008] A stator structure, which is installed on the stator housing, and a second mounting hole is provided on the stator structure;

[0009] Heat dissipation component, the heat dissipation component includes a first heat dissipation part and a second heat dissipation part connected to each other, the first heat dissipation part is inserted into the first mounting hole, and the second heat dissipation part is inserted into the second mounting hole.

[0010] The stator assembly provided in the first aspect of the embodiment of the present application includes a stator housing, a stator structure and a heat dissipation component. Among them, a first mounting hole is provided on the stator housing. The stator structure is mounted on the stator housing, and a second mounting hole is provided on the stator structure. The heat dissipation component includes a first heat dissipation part and a second heat dissipation part connected to each other, the first heat dissipation part is inserted into the first mounting hole, and the second heat dissipation part is inserted into the second mounting hole. In this way, by opening a first mounting hole on the stator housing and a second mounting hole on the stator structure, a part of the heat dissipation component is fixed to the stator housing, and the other part is fixed to the stator structure, shortening the heat path between the stator structure and the stator housing, and enabling the heat generated by the stator structure to be directly conducted to the stator housing through the heat dissipation component, greatly improving the heat dissipation efficiency and enhancing the safety and stability of the motor operation.

[0011] In a possible implementation manner, the stator structure includes: a main body part and a stator winding;

[0012] The main body part is provided with a groove, the stator winding is located in the groove and wound around the main body part, and the stator winding in the groove is surrounded by a second mounting hole through which the second heat dissipation part can pass.

[0013] In a possible implementation manner, the second mounting hole is provided at the central position of the groove.

[0014] In a possible implementation manner, there are a plurality of heat dissipation components, and the plurality of heat dissipation components are arranged along the circumferential direction of the stator housing;

[0015] A plurality of first mounting holes are provided on the stator housing, and a plurality of second mounting holes are provided on the stator structure.

[0016] In a possible implementation manner, the first mounting holes are circumferentially arranged on the stator housing.

[0017] In a possible implementation manner, the second mounting holes are circumferentially arranged on the stator structure.

[0018] In a possible implementation manner, the main body part has a plurality of stator teeth, and grooves are formed between adjacent stator teeth;

[0019] The stator winding is wound around the stator teeth.

[0020] In a possible implementation manner, the heat dissipation component is a heat pipe, the heat pipe is bent and forms two parallel extension segments, and the two extension segments are respectively the first heat dissipation part and the second heat dissipation part.

[0021] In a possible implementation, the stator housing is a ring structure, and the stator structure is located inside the ring structure.

[0022] In a possible implementation, a number of heat dissipation fins are provided on the stator housing, and the number of heat dissipation fins are spaced and evenly distributed on the outer periphery of the stator housing.

[0023] In a possible implementation, the stator housing is a ring structure, and the stator structure is located outside the ring structure.

[0024] In a possible implementation, a number of heat dissipation fins are provided on the stator housing, and the number of heat dissipation fins are spaced and evenly distributed on the inner periphery of the stator housing.

[0025] In a possible implementation, it further includes: an insulating member, and the insulating member is located between the stator winding and the main body portion;

[0026] The insulating member is attached along the groove wall of the groove so that the insulating member covers the stator winding.

[0027] In a possible implementation, it further includes: end plates, and the end plates are located at both ends of the stator structure in the axial direction, and the end plates cover the stator structure;

[0028] A number of through holes for the second heat dissipation portion to pass through are provided on the end plates, and the through holes are adapted to the grooves.

[0029] In a possible implementation, it further includes: a heat conducting member;

[0030] The heat conducting member is located in the gaps between the first heat dissipation portion and the first mounting hole and between the second heat dissipation portion and the second mounting hole.

[0031] The second aspect of the embodiments of the present application provides a motor, including the above-mentioned stator assembly.

[0032] In a possible implementation, it further includes: a rotor, and the rotor is located inside the stator structure of the stator assembly.

[0033] In a possible implementation, it further includes: a rotor, and the rotor is located outside the stator structure of the stator assembly.

[0034] It should be understood that the second aspect of the present application corresponds to the technical solution of the first aspect of the present application, and the beneficial effects obtained by each aspect and the corresponding feasible implementations are similar, and will not be repeated here.

[0035] In addition to the technical problems solved by this application, the technical features constituting the technical solution, and the beneficial effects brought by the technical features of these technical solutions described above, other technical problems that can be solved by a stator assembly and a motor provided by this application, other technical features included in the technical solution, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for describing the embodiments of this application or the prior art. Obviously, the drawings in the following description are only a part of the embodiments of this application. These drawings and the textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 Overall structural schematic diagram of the stator assembly provided by the embodiment of this application;

[0038] Figure 2 Exploded schematic diagram of the stator assembly provided by the embodiment of this application;

[0039] Figure 3 Front view of the stator assembly provided by the embodiment of this application;

[0040] Figure 4 Structural schematic diagram of the heat dissipation component in the stator assembly provided by the embodiment of this application;

[0041] Figure 5 Structural schematic diagram of the stator housing in the stator assembly provided by the embodiment of this application;

[0042] Figure 6 Exploded schematic diagram of the motor provided by the embodiment of this application;

[0043] Figure 7 Flow schematic diagram of the motor simulation of the motor provided by the embodiment of this application and the original structure;

[0044] Figure 8 Comparison schematic diagram of the thermal steady-state results of the motor simulation of the motor provided by the embodiment of this application and the original structure;

[0045] Figure 9 Comparison schematic diagram of the maximum temperature difference of the thermal steady state of the motor simulation of the motor provided by the embodiment of this application and the original structure.

[0046] Explanation of the reference numerals:

[0047] 100 - Stator assembly;

[0048] 200 - Stator housing; 210 - First mounting hole; 220 - Heat dissipation fins;

[0049] 300 - Stator structure; 310 - Main body part; 311 - Groove; 312 - Stator teeth; 320 - Stator winding; 321 - Second mounting hole;

[0050] 400 - Heat dissipation component; 410 - First heat dissipation part; 420 - Second heat dissipation part; 430 - Extension section;

[0051] 500 - Insulating part;

[0052] 600 - End plate; 610 - Through hole;

[0053] 700 - Motor;

[0054] 800 - Rotor. Detailed implementation manners

[0055] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0056] As described in the background art, in existing motors, if a large amount of copper loss generated by the stator winding during operation is not dissipated in time, it will cause local overheating of the winding, increase losses and accelerate the aging of insulating materials, thus seriously threatening the insulation reliability of the motor. There is also a medium between the stator winding and the housing, and these media have high thermal resistance characteristics, resulting in heat being blocked during the process of transferring from the internal heat source of the motor to the external cooling area, making it difficult for heat to conduct efficiently, and ultimately causing uneven temperature distribution inside the motor and forming a large temperature gradient.

[0057] In view of the above technical problems, a stator assembly is provided in the first aspect of the embodiments of the present application. The stator assembly includes a stator housing, a stator structure portion, and a heat sink. Among them, a first mounting hole is provided on the stator housing. The stator structure is mounted on the stator housing, and a second mounting hole is provided on the stator structure. The heat sink includes a first heat dissipation portion and a second heat dissipation portion connected to each other. The first heat dissipation portion is inserted into the first mounting hole, and the second heat dissipation portion is inserted into the second mounting hole. In this way, by providing the first mounting hole on the stator housing and the second mounting hole on the stator structure, a part of the heat sink is fixed to the stator housing, and the other part is fixed to the stator structure, shortening the heat path between the stator structure and the stator housing, enabling the heat generated by the stator structure to be directly conducted to the stator housing through the heat sink, greatly improving the heat dissipation efficiency, and enhancing the safety and stability of the motor operation.

[0058] In the second aspect of the embodiments of the present application, a motor is provided. The motor includes the above-mentioned stator assembly.

[0059] In order to make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0060] The embodiments of the present application provide a stator assembly and a motor. By providing the first mounting hole on the stator housing and the second mounting hole on the stator structure, a part of the heat sink is fixed to the stator housing, and the other part is fixed to the stator structure, shortening the heat path between the stator structure and the stator housing, enabling the heat generated by the stator structure to be directly conducted to the stator housing through the heat sink, greatly improving the heat dissipation efficiency, and enhancing the safety and stability of the motor operation. The following will introduce the specific structures of the stator assembly and the motor provided in the embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0061] Refer to Figure 1 and Figure 2 , in the first aspect, an embodiment of the present application provides a stator assembly 100. Among them, the stator assembly 100 may include a stator housing 200, a stator structure 300, and a heat sink 400. In a possible implementation manner, as Figure 3As shown, a first mounting hole 210 may be provided on the stator housing 200. Additionally, the stator structure 300 may be mounted on the stator housing 200, and a second mounting hole 321 may be provided on the stator structure 300. It can be understood that the first mounting hole 210 and the second mounting hole 321 may be correspondingly arranged. Further, the heat dissipating member 400 may include a first heat dissipating portion 410 and a second heat dissipating portion 420, and the first heat dissipating portion 410 and the second heat dissipating portion 420 are connected to each other. In the embodiment of the present application, the first heat dissipating portion 410 may be inserted into the first mounting hole 210, and the second heat dissipating portion 420 may be inserted into the second mounting hole 321.

[0062] In this way, by providing the first mounting hole 210 on the stator housing 200 and the second mounting hole 321 on the stator structure 300, the first heat dissipating portion 410 of the heat dissipating member 400 is fixed to the stator housing 200, and the second heat dissipating portion 420 is fixed to the stator structure 300, shortening the heat path between the stator structure 300 and the stator housing 200, enabling the heat generated by the stator structure 300 to be directly conducted to the stator housing 200 through the heat dissipating member 400, greatly improving the heat dissipation efficiency, and enhancing the safety and stability of the operation of the motor 700. Of course, in some other embodiments, the first heat dissipating portion 410 may be inserted into the second mounting hole 321, and the second heat dissipating portion 420 may be inserted into the first mounting hole 210, and the embodiment of the present application is not limited thereto.

[0063] Additionally, by inserting at least a part of the heat dissipating member 400 into the stator housing 200, the heat exchange area between the heat dissipating member 400 and the stator housing 200 is increased, making the heat exchange area between the heat dissipating member 400 and the stator housing 200 significantly enlarged.

[0064] Continue to refer to Figure 3 , on the basis of the above embodiment, further, the stator structure 300 may include: a main body portion 310 and a stator winding 320. Among them, a groove 311 may be provided on the main body portion 310, and the stator winding 320 may be located in the groove 311, and the stator winding 320 may be wound around the main body portion 310. In a possible implementation manner, in combination with Figure 2 viewed, the stator winding 320 in each groove 311 may be surrounded by a second mounting hole 321 through which the second heat dissipating portion 420 can pass, so that the stator winding 320 and the heat dissipating member 400 cooperate to transfer the heat generated by the stator winding 320 through the second heat dissipating portion 420 and then along the first heat dissipating portion 410 to the stator housing 200 to improve the heat dissipation efficiency of the stator assembly 100.

[0065] Continue to refer to Figure 3, based on the above embodiments, in a possible implementation manner, the second mounting hole 321 may be disposed at the central position of the groove 311. In the embodiments of the present application, the second mounting hole 321 surrounded by the stator winding 320 may be disposed at the central position of the groove 311, so that the second heat dissipation portion 420 is inserted into the second mounting hole 321 more stably. Of course, in some other embodiments, the second mounting hole 321 may also be disposed at other positions of the groove 311, and the embodiments of the present application do not limit this here.

[0066] Continue to refer to Figure 1 and Figure 2 , based on the above embodiments, in a possible implementation manner, the number of the heat dissipation members 400 may be several, and several heat dissipation members 400 may be disposed along the circumferential direction of the stator housing 200. In addition, several first mounting holes 210 may be provided on the stator housing 200, and several second mounting holes 321 may be provided on the stator structure 300. It can be understood that the numbers of the heat dissipation members 400, the first mounting holes 210, and the second mounting holes 321 in the embodiments of the present application are the same.

[0067] Continue to refer to Figure 1 , based on the above embodiments, the first mounting holes 210 may be circumferentially provided on the stator housing 200. In a possible implementation manner, several first mounting holes 210 may be evenly distributed on the outer periphery of the stator housing 200.

[0068] Continue to refer to Figure 1 , based on the above embodiments, the second mounting holes 321 may be circumferentially provided on the stator structure 300. In a possible implementation manner, several second mounting holes 321 may be evenly distributed on the outer periphery of the stator structure 300. It can be understood that the positions of each first mounting hole 210 and each second mounting hole 321 correspond to each other one by one.

[0069] Continue to refer to Figure 2 and Figure 3 , based on the above embodiments, the main body portion 310 may have stator teeth 312. In a possible implementation manner, the number of the stator teeth 312 may be several, and the number of the stator teeth 312 may be the same as the number of the grooves 311. In the embodiments of the present application, grooves 311 may be formed between adjacent stator teeth 312. It can be understood that the stator winding 320 may be wound around the stator teeth 312.

[0070] Refer to Figure 4, based on the above embodiments, in a possible implementation, the heat dissipation member 400 may be a heat pipe, and the embodiments of the present application do not limit this. In the embodiments of the present application, an example is given with the heat dissipation member 400 being a heat pipe. The heat pipe can be bent and thus form two parallel extending segments 430, so that the heat pipe forms a shape structure like a paper clip. It can be understood that the two extending segments 430 can be the first heat dissipation portion 410 and the second heat dissipation portion 420 respectively. The first heat dissipation portion 410 corresponds to the first mounting hole 210, and the second heat dissipation portion 420 corresponds to the second mounting hole 321.

[0071] It can be understood that, as an efficient heat conduction element, the heat pipe realizes the long-distance transfer of a large amount of heat through the phase change principle of the working medium therein, and does not require external cooling circulation power. Therefore, the heat conduction ability of the heat pipe is relatively excellent, and the equivalent heat conduction coefficient of the heat pipe can usually reach thousands of times that of common metals of the same size, so as to reduce the thermal resistance between the heat source and the heat dissipation medium, enhance the heat transfer efficiency, and thus improve the heat dissipation efficiency of the motor.

[0072] Continue to refer to Figure 2 , based on the above embodiments, in a possible implementation, the stator housing 200 may be an annular structure. In the embodiments of the present application, the stator structure 300 may be located inside the annular structure, so that the stator housing 200 is sleeved on the stator structure 300.

[0073] Refer to Figure 5 , further based on the above embodiments, the stator housing 200 may be provided with heat dissipation fins 220. In a possible implementation, the number of the heat dissipation fins 220 may be several, and the embodiments of the present application do not limit the number of the heat dissipation fins 220 either. In the embodiments of the present application, several heat dissipation fins 220 are spaced and evenly distributed on the outer periphery of the stator housing 200, and each heat dissipation fin 220 can extend outward to export the heat transferred to the stator housing 200, further improving the heat dissipation efficiency of the stator assembly 100.

[0074] In another possible implementation, the stator housing 200 may be an annular structure. It can be understood that the stator structure 300 may be located outside the annular structure, so that the stator structure 300 is sleeved on the stator housing 200.

[0075] On the basis of the above embodiment, further, the stator housing 200 may be provided with heat dissipation fins 220, wherein, in a possible implementation manner, the number of heat dissipation fins 220 may be several, and the embodiment of the present application does not limit the number of heat dissipation fins 220. In the embodiment of the present application, several heat dissipation fins 220 are spaced and evenly distributed on the inner circumference of the stator housing 200, and each heat dissipation fin 220 may extend inwardly, so as to conduct away the heat transferred to the stator housing 200, and further improve the heat dissipation efficiency of the stator assembly 100.

[0076] Continue to refer Figure 2 On the basis of the above embodiment, the stator assembly 100 may further include: an insulating member 500. The insulating member 500 may be located between the stator winding 320 and the main body 310. In a possible implementation, the insulating member 500 may be arranged along the groove wall of the groove 311, so that the insulating member 500 can be covered on the stator winding 320. In this way, the stator winding 320 and the main body 310 can be separated by the insulating member 500, thereby avoiding the occurrence of an electrical short circuit between the stator winding 320 and the main body 310, and ensuring the safe and effective operation of the motor 700.

[0077] Continue to refer Figure 2 On the basis of the above embodiment, the stator assembly 100 may further include: an end plate 600. In one possible implementation, the number of the end plates 600 may be at least two, and the embodiment of the present application is not limited thereto. In the embodiment of the present application, the number of the end plates 600 is two for example, and the two end plates 600 may be respectively located at the two ends of the stator structure 300 in the axial direction, and the end plates 600 may be covered on the stator structure 300.

[0078] In one possible implementation, a through hole 610 is provided on the end plate 600, and the through hole 610 can be provided for the second heat dissipation portion 420 to pass through. In one possible implementation, the number of through holes 610 can be several, and the number of through holes 610 can be the same as the number of grooves 311. In the embodiment of the present application, the shape of the through hole 610 can be the same as the shape of the groove 311, so that the through hole 610 is adapted to the groove 311. It can be understood that the end plate 600 can be made of insulating material to further improve the safety and reliability of the motor 700.

[0079] Based on the above embodiments, the stator assembly 100 may further include: a heat conducting member (not shown in the figure). Among them, the heat conducting member may be located in the gaps between the first heat dissipation portion 410 and the first mounting hole 210, and between the second heat dissipation portion 420 and the second mounting hole 321. In a possible implementation manner, the heat conducting member may be thermal grease, and the embodiments of the present application are not limited thereto. In the embodiments of the present application, the heat conducting member may be applied in the first mounting hole 210 and the second mounting hole 321, so as to fill the gaps between the first heat dissipation portion 410 and the first mounting hole 210, and between the second heat dissipation portion 420 and the second mounting hole 321, thereby achieving an efficient heat exchange effect.

[0080] Referring to Figure 6 , an embodiment of the present application provides a motor 700 in a second aspect. Among them, the motor 700 may include the above-mentioned stator assembly 100.

[0081] Continuing to refer to Figure 6 , based on the above embodiments, the motor 700 may further include: a rotor 800. Among them, in a possible implementation manner, the rotor 800 may be located inside the stator structure 300 in the stator assembly 100, so that the rotor 800 rotates inside the stator structure 300. At this time, the motor 700 may be an inner rotor motor.

[0082] Among them, in another possible implementation manner, the rotor 800 may also be located outside the stator structure 300 in the stator assembly 100, so that the rotor 800 rotates outside the stator structure 300. At this time, the motor 700 may be an outer rotor motor. The embodiments of the present application are not limited thereto, and the connection manner between the stator assembly 100 and the rotor 800 may be determined according to the type of the motor 700.

[0083] In the embodiments of the present application, an electromagnetic-thermal field coupling simulation method may be used to evaluate the influence of the cooling configuration on the heat dissipation capacity of the motor 700. When studying the original motor structure and the structure of the motor 700 with the added heat dissipation member 400, the whole process is mainly divided into two parts: electromagnetic simulation and thermal simulation. Among them, the process schematic diagram may be as Figure 7 shown, and the result of the electromagnetic simulation provides the key motor 700 loss data for the thermal simulation.

[0084] Among them, in the electromagnetic simulation part, two motor models with only different slot fill factors and the same other parameters may be constructed, namely the original motor structure and the structure of the motor 700 with the added heat dissipation member 400. Under the rated speed condition, the copper losses of the two motors with different structures are calculated, and the copper losses are regarded as the heat generated by the stator winding 320 during the operation of the motor, so as to provide data support for the thermal analysis. In this way, the differences in electromagnetic performance between the two motors can be clearly compared.

[0085] Furthermore, in the thermal simulation part, first, the corresponding physical models need to be constructed according to the two motor structures respectively. Then, the loss results obtained from the electromagnetic simulation are input into the thermal model as thermal load parameters, and the thermal steady-state conditions of the two structures are simulated. By comparing the thermal steady-state simulation results of the two structures, the influence of the motor 700 structure with the added heat sink 400 on the thermal performance of the motor 700 is analyzed.

[0086] Through the two parts of electromagnetic simulation and thermal simulation, the differences in electromagnetic and thermal performances between the two motor structures are compared, so as to obtain the thermal steady-state results of the two motors, and further provide a strong basis for motor performance evaluation.

[0087] In the embodiment of the present application, the two parts of the heat sink 400 are respectively embedded in the stator winding 320 and the stator housing 200, which significantly improves the heat dissipation efficiency of the stator winding 320, making the heat dissipation effect of the stator winding 320 better, significantly better than the original motor structure. Among them, Figure 8 It is a comparison diagram of the thermal steady-state results of the two motor structures. Through finite element simulation verification, it is found that for the motor 700 structure with the added heat sink 400, in the thermal steady-state condition, the maximum temperature of the motor 700 is reduced by 18 °C compared with the original structure.

[0088] In addition, for the motor 700 structure with the added heat sink 400 provided in the embodiment of the present application, the heat generated by the stator winding 320 is directly conducted to the stator housing 200 through the heat sink 400, effectively reducing the thermal resistance between the stator winding 320 and the heat dissipation fins 220, and further reducing the temperature gradient inside the motor 700. Among them, Figure 9 It is a comparison diagram of the maximum thermal steady-state temperature difference between the two motor structures. Through finite element simulation verification, it is found that for the motor 700 structure with the added heat sink 400, in the thermal steady-state condition, the maximum temperature difference of the motor 700 is reduced by 24.8 °C compared with the original structure.

[0089] It can be understood that the heat sink 400 structure adopted in the embodiment of the present application is simple and has significant advantages in terms of controlling the size and weight of the motor 700. In the motor 700 structure with the added heat sink 400, the heat sink 400 is embedded between the stator winding 320 and the stator housing 200, and there is no additional equipment, so it will not affect the size of the motor 700. Through modeling comparison, it can be clearly seen that for the motor 700 structure with the added heat sink 400, the overall volume of the motor 700 only increases by 8.3% compared with the original volume, effectively taking into account the improvement of heat dissipation performance and the requirements of the volume of the motor 700.

[0090] In the embodiments of the present application, the stator assembly 100 provided by the embodiments of the present application can fix a part of the heat sink 400 to the stator housing 200 and another part to the stator structure 300 by opening a first mounting hole 210 in the stator housing 200 and a second mounting hole 321 in the stator structure 300, shortening the thermal path between the stator structure 300 and the stator housing 200, and enabling the heat generated by the stator structure 300 to be directly conducted to the stator housing 200 through the heat sink 400, greatly improving the heat dissipation efficiency and enhancing the safety and stability of the operation of the motor 700.

[0091] In the embodiments of the present application, the stator assembly 100 provided by the embodiments of the present application does not affect the radial and axial key dimensions of the motor 700. Except for the heat sink 400, there is no other additional structure, which is conducive to the realization of the lightweight structure of the motor 700.

[0092] The embodiments or implementation manners in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0093] It should be noted that phrases such as "in specific implementation", "in some embodiments", "in this embodiment", and "exemplarily" mentioned in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures, or characteristics with an embodiment, it is within the knowledge scope of those skilled in the art to implement such features, structures, or characteristics in combination with other embodiments, whether explicitly or implicitly described.

[0094] Finally, it should be noted that: After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily think of other implementation manners of the present invention. The present invention is intended to cover any variations, uses, or adaptive changes of the present invention. These variations, uses, or adaptive changes follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the precise structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A stator assembly (100), characterized in that, Comprising: A stator housing (200) provided with a first mounting hole (210) thereon; A stator structure (300) mounted on the stator housing (200), the stator structure (300) being provided with a second mounting hole (321); A heat dissipating member (400), the heat dissipating member (400) including a first heat dissipating portion (410) and a second heat dissipating portion (420) connected to each other, the first heat dissipating portion (410) being inserted into the first mounting hole (210), and the second heat dissipating portion (420) being inserted into the second mounting hole (321).

2. The stator assembly (100) according to claim 1, wherein, The stator structure (300) includes: a main body portion (310) and a stator winding (320); The main body portion (310) is provided with a groove (311), the stator winding (320) is located in the groove (311) and wound around the main body portion (310), and the stator winding (320) in the groove (311) is surrounded by the second mounting hole (321) through which the second heat dissipating portion (420) can pass through.

3. The stator assembly (100) according to claim 2, wherein The second mounting hole (321) is provided at the central position of the groove (311).

4. The stator assembly (100) according to claim 3, characterized in that, There are a plurality of the heat dissipating members (400), and the plurality of heat dissipating members (400) are arranged along the circumferential direction of the stator housing (200); The stator housing (200) is provided with a plurality of the first mounting holes (210), and the stator structure (300) is provided with a plurality of the second mounting holes (321).

5. The stator assembly (100) according to claim 4, characterized in that, The first mounting holes (210) are circumferentially arranged on the stator housing (200); The second mounting holes (321) are circumferentially arranged on the stator structure (300).

6. The stator assembly (100) according to claim 5, characterized in that, The main body portion (310) has a plurality of stator teeth (312), and the grooves (311) are formed between adjacent stator teeth (312); The stator winding (320) is wound around the stator teeth (312).

7. The stator assembly (100) according to claim 6, characterized in that, The heat dissipating member (400) is a heat pipe, the heat pipe is bent and forms two parallel extending segments (430), and the two extending segments (430) are respectively the first heat dissipating portion (410) and the second heat dissipating portion (420).

8. The stator assembly (100) according to any one of claims 1-7, characterized in that, The stator housing (200) is of an annular structure, and the stator structure (300) is located inside the annular structure; Or, the stator structure (300) is located outside the annular structure.

9. The stator assembly (100) according to claim 8, wherein, The stator housing (200) is provided with a plurality of heat dissipating fins (220), and the plurality of heat dissipating fins (220) are spaced and evenly distributed on the outer circumference of the stator housing (200); Or, the plurality of heat dissipating fins (220) are spaced and evenly distributed on the inner circumference of the stator housing (200).

10. The stator assembly (100) according to any one of claims 2-7, characterized in that, Further comprising: An insulating member (500) located between the stator winding (320) and the main body portion (310); The insulating member (500) is attached along the groove wall of the groove (311) so that the insulating member (500) covers the stator winding (320).

11. The stator assembly (100) according to any one of claims 2-7, characterized in that, Further comprising: End plates (600) are located at both ends of the stator structure (300) in the axial direction, and the end plates (600) cover the stator structure (300). A plurality of through holes (610) through which the second heat dissipation part (420) can pass are formed in the end plates (600), and the through holes (610) are adapted to the grooves (311).

12. The stator assembly (100) according to any one of claims 1-7, characterized in that, Further comprising: A heat conducting member; The heat conducting member is located in the gaps between the first heat dissipation part (410) and the first mounting holes (210) and between the second heat dissipation part (420) and the second mounting holes (321).

13. A motor (700), characterized in that, Comprising the stator assembly (100) according to any one of claims 1-12 and a rotor (800); The rotor (800) is located inside the stator structure (300) of the stator assembly (100); Alternatively, the rotor (800) is located outside the stator structure (300) of the stator assembly (100).

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