Thermally enhanced stator structure and motor
By designing a thermally enhanced stator structure and using stator yokes with different radii and a third stator slot configuration, the problems of low space utilization and limited heat transfer in high-speed permanent magnet motors are solved, achieving higher output torque and heat dissipation efficiency, which is suitable for ultra-high-speed permanent magnet motors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TONGJI UNIV
- Filing Date
- 2025-04-08
- Publication Date
- 2026-05-08
AI Technical Summary
Existing high-speed permanent magnet motors suffer from low space utilization, low output torque, and obstructed heat transfer. In particular, in ultra-high-speed applications, the non-overlapping 2-CP winding configuration is not fully utilized, and heat transfer between the stator and the surrounding environment is limited.
A thermally enhanced stator structure is designed, which uses a first stator yoke and a second stator yoke with different radii to form stator slots, thereby increasing space utilization. A third stator slot is set on the outside of the stator yoke as a heat dissipation channel, and combined with a non-overlapping 2-CP winding configuration to improve heat dissipation capacity.
At the same maximum temperature, the output torque is increased by 31.3%, and the space utilization and heat dissipation capacity of the stator structure are improved, making it suitable for ultra-high speed applications.
Smart Images
Figure CN224218152U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to a heat-enhanced stator structure and motor. Background Technology
[0002] High-speed permanent magnet (HSPM) motors include various combinations of slot and pole numbers, with 2-pole rotors widely used to reduce the fundamental frequency. Alternating layouts with two-coil spacing (2-CP) windings provide relatively large output torque and high torque density, but their overlapping end windings result in long rotor axial length, low critical speed, and high production costs. Meanwhile, non-overlapping 2-CP winding configurations are not yet used in ultra-high speed (UHS) applications.
[0003] Currently, only half of the slots in ultra-high-speed permanent magnet motors using non-overlapping 2-CP winding configurations are utilized. The unused space is blocked by the end face windings. Furthermore, due to the contact thermal resistance between the stator core and the frame, the conductive heat transfer between the stator and the surrounding environment is hindered.
[0004] The above content is only used to help understand the technical solution of this utility model and does not represent an admission that the above content is prior art. Utility Model Content
[0005] The main purpose of this invention is to provide a thermally enhanced stator structure and motor, which aims to solve the technical problems of low space utilization and low output torque in existing motors.
[0006] To achieve the above objectives, this utility model proposes a thermally enhanced stator structure, which includes a stator yoke and multiple stator teeth.
[0007] The stator yoke is arranged in a ring shape, and each stator tooth is periodically arranged on the inner side of the stator yoke, extending towards the center of the stator yoke;
[0008] The stator yoke is staggered along the arrangement of the stator teeth to form a first stator yoke and a second stator yoke with different radii, wherein the radius of the first stator yoke is greater than the radius of the second stator yoke;
[0009] The first stator yoke and the ends of the two stator teeth form a fan-shaped first stator slot, the second stator yoke and the sides of the two stator teeth form a fan-shaped second stator slot, and a third stator slot is provided between the two first stator slots.
[0010] Optionally, the first stator slot is divided into an upper space and a lower space along the radial direction of the stator teeth, and the radius of the upper space is the same as the radius of the second stator yoke;
[0011] The thermally enhanced stator structure further includes: a first phase winding, a second phase winding, and a third phase winding;
[0012] The first phase winding, the second phase winding, and the third phase winding all pass through the lower space of the first stator slot or the second stator slot.
[0013] Optionally, the first phase winding includes: a first phase upper winding and a first phase lower winding; the second phase winding includes: a second phase upper winding and a second phase lower winding; and the third phase winding includes: a third phase upper winding and a third phase lower winding.
[0014] The first phase upper winding, the second phase upper winding, and the third phase upper winding are respectively passed through two adjacent second stator slots;
[0015] The first phase lower winding, the second phase lower winding, and the third phase lower winding are respectively passed through the lower space of two adjacent first stator slots.
[0016] Optionally, the two stator teeth wound on the upper winding of the first phase are also wound with the lower winding of the second phase and the lower winding of the third phase, respectively.
[0017] The two stator teeth wound on the upper winding of the second phase are also wound with the lower winding of the first phase and the lower winding of the third phase, respectively;
[0018] The two stator teeth wound on the upper winding of the third phase are also wound with the lower winding of the first phase and the lower winding of the second phase, respectively.
[0019] Optionally, the first phase upper winding, the second phase upper winding, and the third phase upper winding are all wound on the second stator yoke.
[0020] Optionally, the maximum torque density can be obtained by setting a preset current density and a preset ferromagnetic flux density for the thermally enhanced stator structure.
[0021] Optionally, the third stator slot is disposed on one side of the second stator yoke extending outward from the axis along the two stator teeth, and the third stator slot is configured as a heat dissipation channel.
[0022] Optionally, the thermally enhanced stator structure further includes pole shoes connected to the end of each stator tooth away from the stator yoke.
[0023] Optionally, the number of stator teeth is six, the number of the first stator slot, the number of the second stator slot and the number of the third stator slot are three each, the number of the first phase winding, the number of the second phase winding and the number of the third phase winding are two each, and the two first phase windings, the two second phase windings and the two third phase windings rotate 180 degrees around the central axis of the stator yoke as the rotation center, and the current directions are opposite.
[0024] In addition, to achieve the above objectives, this utility model also provides an electric motor, which includes a rotor and a heat-enhanced stator structure as described above, wherein the rotor is disposed at the center of the heat-enhanced stator structure.
[0025] This invention provides a heat-enhanced stator structure and a motor. The heat-enhanced stator structure includes a stator yoke and multiple stator teeth. The stator yoke is arranged in a ring shape, and each stator tooth is periodically arranged on the inner side of the stator yoke, extending towards the center of the stator yoke. The stator yoke is staggered along the arrangement of the stator teeth to form a first stator yoke and a second stator yoke with different radii, the radius of the first stator yoke being larger than the radius of the second stator yoke. The first stator yoke and the ends of two stator teeth form a fan-shaped first stator slot, and the second stator yoke and the sides of two stator teeth form a fan-shaped second stator slot. A third stator slot is provided between the two first stator slots. By setting the stator slots formed by the first stator yoke and the second stator yoke with different radii, the space utilization rate of the stator structure is improved. At the same time, the third stator slot on the outside of the stator yoke enhances the heat dissipation capacity. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of the stator core structure of the first embodiment of the heat-enhanced stator structure of this utility model;
[0028] Figure 2 This is a schematic diagram of the stator structure in the first embodiment of the heat-enhanced stator structure of this utility model;
[0029] Figure 3 This is a schematic diagram of the stator structure in the prior art;
[0030] Figure 4 This is a schematic diagram of the second embodiment of the heat-enhanced stator structure of this utility model;
[0031] Figure 5 This is a first mapping diagram of the second embodiment of the thermally enhanced stator structure of this utility model;
[0032] Figure 6 This is a second mapping diagram of the second embodiment of the thermally enhanced stator structure of this utility model;
[0033] Figure 7 This is a third mapping diagram of the second embodiment of the thermally enhanced stator structure of this utility model;
[0034] Figure 8 This is the fourth mapping diagram of the second embodiment of the thermally enhanced stator structure of this utility model;
[0035] Figure 9 This is a structural schematic diagram of the first embodiment of the motor of this utility model.
[0036] Explanation of reference numerals in the attached diagram: 10, stator yoke; 20, stator tooth; 101, first stator yoke; 102, second stator yoke; 111, first stator slot; 112, second stator slot; 113, third stator slot; 121, upper space; 122, lower space; 201, pole shoe; 301, upper winding of the first phase; 302, upper winding of the second phase; 303, upper winding of the third phase; 311, lower winding of the first phase; 312, lower winding of the second phase; 313, lower winding of the third phase; 40, rotor.
[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0038] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0040] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0041] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0042] The main solution of this utility model embodiment is: the heat-enhanced stator structure includes: a stator yoke and multiple stator teeth; the stator yoke is arranged in a ring shape, and each of the stator teeth is periodically arranged on the inner side of the stator yoke, extending towards the center of the stator yoke; the stator yoke is staggered along the arrangement of the stator teeth to form a first stator yoke and a second stator yoke with different radii, the radius of the first stator yoke being larger than the radius of the second stator yoke; the first stator yoke and the ends of the two stator teeth form a fan-shaped first stator slot, the second stator yoke and the sides of the two stator teeth form a fan-shaped second stator slot, and a third stator slot is provided between the two first stator slots.
[0043] Currently, HSPM motors are widely studied due to their advantages such as high power density, light weight, and miniaturization, with a focus on various motor topologies. Generally, 2-pole rotors are widely used to reduce the fundamental frequency. 2-CP windings can provide relatively large output torque and high torque density. However, the overlapping end windings of 2-CP windings result in long rotor axial length, low critical speed, and high production costs. To address these issues, a non-overlapping 2-CP winding configuration is needed. However, in ultra-high-speed applications, non-overlapping 2-CP winding configurations have not yet been adopted. Currently, in ultra-high-speed permanent magnet motors using non-overlapping 2-CP winding configurations, only half of the slots are utilized; the unused space is blocked by end-face windings, and the conductive heat transfer between the stator and the surrounding environment is hindered due to the contact thermal resistance between the stator core and the frame.
[0044] This solution proposes a thermally enhanced stator structure that improves the space utilization of the stator structure by setting a first stator yoke with different radii and a stator slot formed by a second stator yoke. At the same time, a third stator slot is set on the outside of the stator yoke to enhance the heat dissipation capacity.
[0045] Reference Figure 1 , Figure 1 This is a schematic diagram of the stator core structure of the first embodiment of the heat-enhanced stator structure of this utility model. Figure 1 As shown, in this embodiment, the thermally enhanced stator structure includes: a stator yoke 10 and a plurality of stator teeth 20.
[0046] The stator yoke 10 is arranged in a ring shape, and the stator teeth 20 are periodically arranged on the inner side of the stator yoke 10, extending towards the center of the stator yoke 10. The stator yoke 10 is staggered along the arrangement of the stator teeth 20 to form a first stator yoke 101 and a second stator yoke 102 with different radii, wherein the radius of the first stator yoke 101 is larger than the radius of the second stator yoke 102.
[0047] It should be noted that the stator yoke 10 is constructed into a closed ring by a first stator yoke 101 and a second stator yoke 102 with different radii. The inner edge of the first stator yoke 101 can have the same radius as the outer edge of the second stator yoke 102, or the inner edge radius of the first stator yoke 101 can be smaller than the outer edge radius of the second stator yoke 102.
[0048] It should be understood that the first stator yoke 101 and the ends of the two stator teeth 20 form a fan-shaped first stator groove 111, the second stator yoke 102 and the sides of the two stator teeth 20 form a fan-shaped second stator groove 112, and a third stator groove 113 is provided between the two first stator grooves 111.
[0049] The number of stator teeth 20 can be six or three, etc. In this embodiment, a six-slot motor with six electronic teeth is used as an example. The number of stator teeth 20 is six, the number of the first stator slot 111, the second stator slot 112 and the third stator slot 113 are three each, the number of the first phase winding, the number of the second phase winding and the number of the third phase winding are two each. The two first phase windings, the two second phase windings and the two third phase windings rotate 180 degrees around the central axis of the stator yoke 10, and the current directions are opposite.
[0050] It should be noted that for low-power, small-size HSPM motors, 6-slot and 3-slot stator structures are typically used, with non-overlapping gear ring windings. The 3-slot motor has a winding factor of 0.866, resulting in greater output torque compared to the 6-slot motor (0.5), which has a smaller winding factor. The asymmetrical distribution of the 3-slot motor leads to increased rotor losses and unbalanced magnetic force. Therefore, the symmetrically distributed 6-slot motor is more suitable for ultra-high-speed applications. To avoid excessively low output torque due to a 0.5 winding factor, an alternating layout of 2-coil spacing (2-CP) windings is used in the 6-slot / 2-pole (6s / 2p) ultra-high-speed motor.
[0051] Furthermore, referring to Figure 2 , Figure 2This is a schematic diagram of the stator structure in the first embodiment of the heat-enhanced stator structure of this utility model. The first stator slot 111 is divided into an upper space 121 and a lower space 122 along the radial direction of the stator teeth 20. The radius of the upper space 121 is the same as the radius of the second stator yoke 102. The heat-enhanced stator structure also includes a first phase winding, a second phase winding, and a third phase winding. The first phase winding, the second phase winding, and the third phase winding all pass through the lower space 122 of the first stator slot 111 or the second stator slot 112.
[0052] It should be noted that existing stator structures only use half-slots, i.e., the upper or lower space, to avoid end winding (EW) overlap and excessive EW axial length. (Refer to...) Figure 3 , Figure 3 This is a schematic diagram of the stator structure in the prior art. The figure shows a primitive 6s / 2p motor topology with non-overlapping 2-CP windings, in which an upper coil and a lower coil are replaced in the same phase, and unused upper or lower space is blocked by end face windings.
[0053] It should be understood that, in this embodiment, the first phase winding includes a first phase upper winding 301 and a first phase lower winding 311, the second phase winding includes a second phase upper winding 302 and a second phase lower winding 312, and the third phase winding includes a third phase upper winding 303 and a third phase lower winding 313; the first phase upper winding 301, the second phase upper winding 302, and the third phase upper winding 303 are respectively passed through two adjacent second stator slots 112; the first phase lower winding 311, the second phase lower winding 312, and the third phase lower winding 313 are respectively passed through the lower space 122 of two adjacent first stator slots 111.
[0054] Specifically, the two stator teeth 20 wound on the first phase upper winding 301 are also wound on the second phase lower winding 312 and the third phase lower winding 313, respectively; the two stator teeth 20 wound on the second phase upper winding 302 are also wound on the first phase lower winding 311 and the third phase lower winding 313, respectively; and the two stator teeth 20 wound on the third phase upper winding 303 are also wound on the first phase lower winding 311 and the second phase lower winding 312, respectively.
[0055] Furthermore, the first phase upper winding 301, the second phase upper winding 302, and the third phase upper winding 303 are all wound on the second stator yoke 102. The coil windings are in direct contact with the stator core for heat exchange, enhancing the heat dissipation capacity of the core.
[0056] In this embodiment, the heat-enhanced stator structure includes a stator yoke and multiple stator teeth. The stator yoke is arranged in a ring shape, and each stator tooth is periodically arranged on the inner side of the stator yoke, extending towards the center of the stator yoke. The stator yoke is staggered along the arrangement of the stator teeth to form a first stator yoke and a second stator yoke with different radii, the radius of the first stator yoke being larger than the radius of the second stator yoke. The first stator yoke and the ends of two stator teeth form a fan-shaped first stator slot, and the second stator yoke and the sides of two stator teeth form a fan-shaped second stator slot. A third stator slot is provided between the two first stator slots. By setting the stator slots formed by the first stator yoke and the second stator yoke with different radii, the space utilization rate of the stator structure is improved, and the third stator slot on the outside of the stator yoke enhances the heat dissipation capacity.
[0057] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 4 , Figure 4 This is a schematic diagram of the second embodiment of the thermally enhanced stator structure of this utility model.
[0058] The third stator slot 113 is disposed on one side of the second stator yoke 102 extending outward from the axis along the two stator teeth 20, and the third stator slot 113 is configured as a heat dissipation channel. The thermally enhanced stator structure also includes pole shoes, the pole shoes 201 being connected to the end of each stator tooth 20 away from the stator yoke 10.
[0059] It should be noted that the side of the pole shoe 201 facing the central axis of the stator yoke 10 is an arc surface, which is used to cooperate with the rotor. When the rotor is located in the space defined by the multiple pole shoes 201, there is a gap between the arc surface and the rotor to facilitate the rotation of the rotor relative to the stator. There is a gap between adjacent pole shoes 201, and the circumferential arc length of the pole shoe 201 is greater than the circumferential width of the inner stator teeth 20. As a result, the pole shoes 201 can form a larger and more uniform magnetic field with the rotor, which is beneficial to improving the power density of the stator.
[0060] Furthermore, the maximum torque density can be obtained by setting a preset current density and a preset ferromagnetic flux density for the thermally enhanced stator structure.
[0061] In practical implementation, the original UHSPM motor parameters with non-overlapping 2-CP windings can be designed using the Finite Element Method (FEM) while considering stator thermal limitations. Stator thermal limitations refer to the heat lost through the stator's outer surface, which can be calculated using the overall thermal conductivity, the motor's maximum operating temperature, and the stator dimensions. Considering stator thermal limitations, i.e., stator loss limitations including stator core and DC copper losses, two optimization methods can be adopted: one is to fix the total stator loss, with variables including the segmentation ratio (λ), i.e., the ratio of the stator inner diameter to the outer diameter, and the maximum stator ferromagnetic flux density (B). max ) and phase current (I max Another approach is to fix the current density and total stator losses, with variables including λ and B. max This embodiment chooses the latter method because limiting the current density to a reasonable value prevents erroneous optimization results, such as a small slot area, high current density, large iron volume, and low stator ferromagnetic flux density. In this case, copper losses will be generated in a quadratic form, and due to the low thermal conductivity of the conductor insulation layer, the winding temperature must exceed the maximum allowable temperature. Therefore, it is necessary to limit the current density to avoid localized overheating caused by internal winding heating.
[0062] In one possible implementation, under the same stator thermal constraints and various fixed current densities, the relationship between the maximum torque density and λ is as follows: Figure 5 - Figure 8 As shown. Figure 5 This is a first mapping diagram of the second embodiment of the thermally enhanced stator structure of this utility model; Figure 6 This is a second mapping diagram of the second embodiment of the thermally enhanced stator structure of this utility model; Figure 7 This is a third mapping diagram of the second embodiment of the thermally enhanced stator structure of this utility model; Figure 8 This is the fourth mapping diagram of the second embodiment of the thermally enhanced stator structure of this utility model. With a fixed total stator loss, B... max An increase in this will lead to an increase in the maximum torque density (Max T / V), while the allowable current density (J) remains constant (at...). Figure 5 J = 12A / mm 2 ,exist Figure 6 J = 15A / mm 2 In the case of B, the opposite trend will occur. The results also show that the dominant constraint on maximum torque density increases with B. max It changes with the change, that is, small B max Current density and large B at that time max Stator loss at that time, refer to Figure 5 and Figure 6 There exists an optimal B.max That is, J = 12A / mm 2 The time is 1.3T; J = 15A / mm 2 The temperature was 1.2T. With B max The optimization of λ and the increase of λ result in the design objective first increasing and then decreasing. Therefore, considering the two constraints mentioned above, there exists an optimal split ratio (Splitratio), referring to... Figure 7 and Figure 8 That is, at J=12 and 15A / mm 2 The value is 0.32. When J = 15 A / mm 2 At this point, all torque densities considering only stator losses are less than those considering only current density. Therefore, when the allowable current density is relatively large, stator losses are the main limiting factor for all shunt ratios. Under the same back EMF, although each coil of a parallel winding has twice the number of turns as a series winding, their phase currents are the same due to the identical current density. Therefore, connecting windings with the same number of turns in series has almost no impact on motor optimization based on the same back EMF.
[0063] In practice, the highest temperature in the temperature distribution of the thermally reinforced stator structure occurs at the stator tooth tip, such as... Figure 3 The highest temperature in the existing stator structure shown occurs in the soft winding in the lower space of the stator slot, which is exactly the lowest temperature point of the heat-enhanced stator structure in this solution, near the cooling pipes of the third stator slot. With a maximum temperature almost identical to that of the existing stator structure, the motor output torque using the heat-enhanced stator structure can be increased by 31.3%.
[0064] In this embodiment, the thermally enhanced stator structure includes pole shoes connected to the ends of each stator tooth furthest from the stator yoke. Maximum torque density is achieved by setting a preset current density and a preset ferromagnetic flux density for the thermally enhanced stator structure. By incorporating a third stator slot in the thermally enhanced structure, a forced airflow channel is introduced to enhance heat dissipation of the UHSPM motor, resulting in higher output torque at the same maximum temperature.
[0065] In addition, in order to achieve the above objectives, this utility model embodiment also proposes an electric motor. Since the electric motor includes a rotor 40 and the above-mentioned heat-enhanced stator structure, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0066] Reference Figure 9 , Figure 9 This is a schematic diagram of the structure of the first embodiment of the motor of this utility model. The rotor 40 is located at the center of the heat-enhanced stator structure.
[0067] In this embodiment, the motor adopts a non-overlapping two-coil spacing winding and is designed with a thermal enhancement structure, resulting in relatively high torque density and rotor mechanical strength. By setting the first stator yoke with different radii and the stator slots formed by the second stator yoke, the space utilization of the stator structure is improved. At the same time, a third stator slot is set on the outside of the stator yoke to enhance heat dissipation, resulting in higher output torque at the same maximum temperature.
[0068] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
[0069] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0070] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0071] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
Claims
1. A thermally enhanced stator structure, characterized in that, The thermally enhanced stator structure includes: a stator yoke and multiple stator teeth; The stator yoke is arranged in a ring shape, and each stator tooth is periodically arranged on the inner side of the stator yoke, extending towards the center of the stator yoke; The stator yoke is staggered along the arrangement of the stator teeth to form a first stator yoke and a second stator yoke with different radii, wherein the radius of the first stator yoke is greater than the radius of the second stator yoke; The first stator yoke and the ends of the two stator teeth form a fan-shaped first stator slot, the second stator yoke and the sides of the two stator teeth form a fan-shaped second stator slot, and a third stator slot is provided between the two first stator slots.
2. The thermally enhanced stator structure as described in claim 1, characterized in that, The first stator slot is divided into an upper space and a lower space along the radial direction of the stator teeth, and the radius of the upper space is the same as the radius of the second stator yoke; The thermally enhanced stator structure further includes: a first phase winding, a second phase winding, and a third phase winding; The first phase winding, the second phase winding, and the third phase winding all pass through the lower space of the first stator slot or the second stator slot.
3. The thermally enhanced stator structure as described in claim 2, characterized in that, The first phase winding includes: a first phase upper winding and a first phase lower winding; the second phase winding includes: a second phase upper winding and a second phase lower winding; and the third phase winding includes: a third phase upper winding and a third phase lower winding. The first phase upper winding, the second phase upper winding, and the third phase upper winding are respectively passed through two adjacent second stator slots; The first phase lower winding, the second phase lower winding, and the third phase lower winding are respectively passed through the lower space of two adjacent first stator slots.
4. The thermally enhanced stator structure as described in claim 3, characterized in that, The two stator teeth wound on the upper winding of the first phase are also wound with the lower winding of the second phase and the lower winding of the third phase, respectively; The two stator teeth wound on the upper winding of the second phase are also wound with the lower winding of the first phase and the lower winding of the third phase, respectively; The two stator teeth wound on the upper winding of the third phase are also wound with the lower winding of the first phase and the lower winding of the second phase, respectively.
5. The thermally enhanced stator structure as described in claim 4, characterized in that, The first phase upper winding, the second phase upper winding, and the third phase upper winding are all wound on the second stator yoke.
6. The thermally enhanced stator structure as described in claim 1, characterized in that, The maximum torque density is obtained by setting the preset current density and preset ferromagnetic flux density of the thermally enhanced stator structure.
7. The thermally enhanced stator structure as described in claim 1, characterized in that, The third stator slot is located on one side of the second stator yoke extending outward from the axis along the two stator teeth, and the third stator slot is configured as a heat dissipation channel.
8. The thermally enhanced stator structure as described in claim 1, characterized in that, The thermally enhanced stator structure also includes pole shoes, which are connected to the end of each stator tooth away from the stator yoke.
9. The thermally enhanced stator structure as described in claim 2, characterized in that, The stator has six teeth, and there are three first stator slots, three second stator slots, and three third stator slots. There are two first phase windings, two second phase windings, and two third phase windings. The two first phase windings, the two second phase windings, and the two third phase windings rotate 180 degrees around the central axis of the stator yoke, and the current directions are opposite.
10. An electric motor, characterized in that, The motor includes a rotor and a heat-enhanced stator structure as described in any one of claims 1 to 9, wherein the rotor is disposed at the center of the heat-enhanced stator structure.