Stator assembly and electric machine

Abstract

The application discloses a kind of stator assembly and motor, it is related to motor technical field, including winding, stator core, first insulating plate, second insulating plate and shell structure, the winding is set in the both ends of the stator core, one end of the stator core is provided with the first insulating plate, the other end of the stator core is provided with the second insulating plate, the winding is set in the shell structure, the shell structure is filled with phase change energy storage material.The application improves the filling amount of phase change energy storage material by using the space of shell structure between motor end and shaft, increases the space utilization rate;Utilize phase change energy storage material to enhance the instantaneous heat dissipation capacity of motor, improve the heat dissipation capacity under the continuous operation state of motor.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a stator assembly and a motor. Background Technology

[0002] As a core component in many industries, the performance requirements for electric motors have been continuously increasing in recent years. In many applications, such as robot joints, electric vehicles, and spacecraft, where high torque density is required, the space constraints on the motor structure are becoming increasingly severe, making it difficult to design additional heat dissipation devices to reduce the motor's temperature rise. However, the ever-increasing performance requirements lead to increasingly higher thermal loads on the motor, seriously threatening its safe and reliable operation.

[0003] Existing technical solutions typically occupy a certain amount of effective space for heat dissipation design at the ends, in slots, or at the connection between the stator and the housing. If the motor space is limited, this will lead to a reduction in the structure of the stator during the design process, which will inevitably result in performance loss. The increased heat dissipation capacity is insufficient to compensate for the increased losses caused by this performance loss, and may even lead to the risk of motor burnout. Summary of the Invention

[0004] The purpose of this invention is to provide a stator assembly and motor to solve the problems existing in the prior art, without occupying any effective space of the motor, and to enhance the instantaneous heat dissipation capacity of the motor and improve torque density through phase change energy storage materials.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] The present invention provides a stator assembly, including a winding, a stator core, a first insulating plate, a second insulating plate, and a housing structure. The winding is disposed at both ends of the stator core. One end of the stator core is provided with the first insulating plate, and the other end of the stator core is provided with the second insulating plate. The winding is disposed in the housing structure, and the housing structure is filled with a phase change energy storage material.

[0007] Preferably, the outer casing structure includes a first end casing and a second end casing, which are respectively disposed at both ends of the stator core. Both the first end casing and the second end casing include a first housing, a second housing, a third housing, a fourth housing, and a cover. The cover of the first end casing is provided with a lead-out port. The first housing, the second housing, the third housing, and the fourth housing are coaxially arranged and arranged sequentially from the inside to the outside. The winding is located between the second housing and the third housing. There is a gap between the winding and the cover. The outer diameter of the stator core is the same as the outer diameter of the fourth housing. The cover is located at the outer end of the first housing, the second housing, the third housing, and the fourth housing.

[0008] Preferably, the first insulating plate is connected to one of the third housings and one of the fourth housings respectively, the second insulating plate is connected to another of the third housings and another of the fourth housings respectively, an insulating layer is provided between the winding and the second housing, and the insulating layer extends to the inner ends of the first housing and the second housing, the space formed by the first housing, the second housing, the cover and the insulating layer of the first end housing or the second end housing is filled with phase change energy storage material, the space formed by the third housing, the fourth housing, the cover and the first insulating plate of the first end housing is filled with phase change energy storage material, and the space formed by the third housing, the fourth housing, the cover and the second insulating plate of the second end housing is filled with phase change energy storage material.

[0009] Preferably, a plurality of first heat-conducting pillars are provided between the first housing and the second housing, one end of the first heat-conducting pillar is connected to the outer wall of the first housing, and the other end of the first heat-conducting pillar is connected to the inner wall of the second housing. A plurality of second heat-conducting pillars are provided between the third housing and the fourth housing, one end of the second heat-conducting pillar is connected to the outer wall of the third housing, and the other end of the second heat-conducting pillar is connected to the inner wall of the fourth housing.

[0010] Preferably, the first heat-conducting pillar and the second heat-conducting pillar are distributed in at least two layers along the axial direction of the first end shell or the second end shell, and the first heat-conducting pillar and the second heat-conducting pillar in the same layer are distributed in at least two layers along the circumferential direction of the first end shell or the second end shell, and the first heat-conducting pillars or the second heat-conducting pillars in adjacent layers are staggered.

[0011] Preferably, the inner side of the first housing is provided with a plurality of heat dissipation fins, the heat dissipation fins are fan-shaped, the heat dissipation fins are distributed in at least two layers along the axial direction of the first end housing or the second end housing, the heat dissipation fins in adjacent layers are separated by gaps, and the heat dissipation fins in the same layer are distributed in at least two circumferentially along the first end housing or the second end housing, the heat dissipation fins in the same layer are separated by gaps.

[0012] Preferably, the outer shell structure includes an inner cylinder, an outer cylinder, and end caps. The inner cylinder is disposed inside the outer cylinder and is coaxially arranged with the outer cylinder. An end cap is provided at each end of the inner cylinder. The end caps are used to close the space between the inner cylinder and the outer cylinder. A lead-out port is provided on one of the end caps.

[0013] Preferably, the stator core and the winding are both located between the inner cylinder and the outer cylinder, and there is a gap between the winding and the end cover. The first insulating plate is connected to the inner cylinder and the outer cylinder respectively, and the second insulating plate is connected to the inner cylinder and the outer cylinder respectively. The space formed by the inner cylinder, the outer cylinder, one end cover, one winding and the first insulating plate is filled with phase change energy storage material. The space formed by the inner cylinder, the outer cylinder, another end cover, another winding and the second insulating plate is filled with phase change energy storage material. The space formed by the inner cylinder, the outer cylinder, the first insulating plate, the second insulating plate and the stator core is filled with phase change energy storage material.

[0014] The present invention also provides an electric motor including the stator assembly.

[0015] The present invention achieves the following technical effects compared to the prior art:

[0016] This invention utilizes the space of the outer shell structure between the motor end and the shaft to increase the amount of phase change energy storage material filling, thereby increasing space utilization; it also utilizes the phase change energy storage material to enhance the instantaneous heat dissipation capacity of the motor, thus improving the heat dissipation capacity of the motor during continuous operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an external schematic diagram of the stator assembly of the present invention (Embodiment 1);

[0019] Figure 2 This is a schematic diagram of the internal structure of the stator assembly of the present invention (Embodiment 1);

[0020] Figure 3 This is a schematic diagram of the first or second end housing of the present invention (Embodiment 1);

[0021] Figure 4 This is a schematic diagram of the heat dissipation fins of the present invention (Embodiment 1);

[0022] Figure 5 This is an external schematic diagram of the stator assembly of the present invention (Embodiment 2);

[0023] Figure 6 This is a schematic diagram of the internal structure of the stator assembly of the present invention (Embodiment 2);

[0024] Figure 7This is a schematic diagram showing the positions of the windings and stator core of the present invention (Embodiment 2);

[0025] Figure 8 This is a cross-sectional view of the outer shell structure of the present invention (Embodiment 2);

[0026] Wherein: 100-stator assembly, 1-first end shell, 2-insulation layer, 3-winding, 4-first insulation plate, 5-stator core, 6-second insulation plate, 7-lead outlet, 8-second end shell, 9-heat dissipation fins, 10-first heat conduction pillar, 11-second heat conduction pillar, 12-inner cavity, 13-outer cavity, 14-first shell, 15-second shell, 16-third shell, 17-fourth shell, 18-inner cylinder, 19-outer cylinder, 20-end cap. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The purpose of this invention is to provide a stator assembly and motor to solve the problems existing in the prior art, without occupying any effective space of the motor, and to enhance the instantaneous heat dissipation capacity of the motor and improve torque density through phase change energy storage materials.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] like Figures 1-4 As shown: This embodiment provides a stator assembly 100, applied to a slotted stator structure suitable for high torque density motors or compact motors. It includes a winding 3, a stator core 5, a first insulating plate 4, a second insulating plate 6, and a housing structure. The winding 3 is disposed at both ends of the stator core 5. One end of the stator core 5 is provided with the first insulating plate 4 to increase the insulation of the stator core 5, and the other end of the stator core 5 is provided with the second insulating plate 6. The first insulating plate 4 and the second insulating plate 6 are used for... The winding 3 is disposed within the housing structure, which is filled with a phase change energy storage material. The liquefaction temperature of the phase change energy storage material is slightly higher than the steady-state temperature of the motor, used for the absorption and dissipation of heat generated under motor overload conditions.

[0032] Specifically, in this embodiment, the centerline of the outer shell structure coincides with the motor axis. The outer shell structure includes a first end shell 1 and a second end shell 8. The first end shell 1 is disposed at the upper end of the stator core 5, and the second end shell 8 is disposed at the lower end of the stator core 5. Both the first end shell 1 and the second end shell 8 include a first shell 14, a second shell 15, a third shell 16, a fourth shell 17, and a cover. An inner cavity 12 is formed between the first shell 14 and the second shell 15, and an outer cavity 13 is formed between the third shell 16 and the fourth shell 17. The cross-sections of the inner cavity 12 and the outer cavity 13 are both annular and are used to fill phase change energy storage materials. The size of cavity 13 is determined by the strength of the outer shell structure without compromising its integrity. A lead-out port 7 is provided on the cover of the first end outer shell 1. The size of the lead-out port 7 is determined by the ability to pass through the lead-out wire. The first shell 14, the second shell 15, the third shell 16, and the fourth shell 17 are arranged coaxially and sequentially from the inside to the outside. The inner diameter of the first shell 14 is determined by the requirement that it does not affect the rotation of the motor shaft. The winding 3 is located between the second shell 15 and the third shell 16. There is a gap between the winding 3 and the cover. The height of the cover is slightly higher than the height of the end of the winding 3. The outer diameter of the stator core 5 is the same as the outer diameter of the fourth shell 17. The cover is located at the outer end of the first shell 14, the second shell 15, the third shell 16, and the fourth shell 17.

[0033] In this embodiment, the first insulating plate 4 is connected to a third housing 16 and a fourth housing 17 respectively. Taking the first end housing 1 as an example, the lower ends of the first housing 14 and the second housing 15 of the first end housing 1 are both higher than the first insulating plate 4 by a certain distance to avoid collisions during motor shaft rotation. The second insulating plate 6 is connected to another third housing 16 and another fourth housing 17 respectively. The upper ends of the first housing 14 and the upper ends of the second housing 15 of the second end housing 8 are both lower than the second insulating plate 6 by a certain distance. An insulating layer 2 is provided between the winding 3 and the second housing 15, and the insulating layer 2 extends to the inner ends of the first housing 14 and the second housing 15. The insulating layer 2 is formed of highly thermally conductive insulating adhesive, and the specific shape of the insulating layer 2 is a thin shell. The insulating layer 2 is used for the first end housing 16. The end shell 1 or the second end shell 8 is fixed to the winding 3. Simultaneously, the insulating layer 2 further improves the heat transfer efficiency between the winding 3 and the first shell 14 and the second shell 15. The space formed by the first shell 14, the second shell 15, the cover, and the insulating layer 2 of the first end shell 1 or the second end shell 8 is filled with phase change energy storage material. The space formed by the third shell 16, the fourth shell 17, the cover, and the first insulating plate 4 of the first end shell 1 is filled with phase change energy storage material. The space formed by the third shell 16, the fourth shell 17, the cover, and the second insulating plate 6 of the second end shell 8 is filled with phase change energy storage material. The volume of the phase change energy storage material in each space is smaller than the volume of the space it occupies, avoiding deformation of the shell structure caused by thermal expansion and contraction of the phase change energy storage material. The first shell 14 and the fourth shell 17 are respectively provided with openings. The size of the openings is sufficient to allow the injection of phase change energy storage material; the openings should not be too large to avoid affecting the sealing performance of the structure.

[0034] In this embodiment, a plurality of first heat-conducting pillars 10 are disposed between the first housing 14 and the second housing 15. One end of the first heat-conducting pillar 10 is connected to the outer wall of the first housing 14, and the other end of the first heat-conducting pillar 10 is connected to the inner wall of the second housing 15. A plurality of second heat-conducting pillars 11 are disposed between the third housing 16 and the fourth housing 17. One end of the second heat-conducting pillar 11 is connected to the outer wall of the third housing 16, and the other end of the second heat-conducting pillar 11 is connected to the inner wall of the fourth housing 17. The first heat-conducting pillars 10 and the second heat-conducting pillars 11 play a role in heat dissipation during steady-state operation of the motor, and play a role in rapid heat conduction and accelerating the liquefaction of the phase change energy storage material during transient overload.

[0035] In this embodiment, both the first heat-conducting pillar 10 and the second heat-conducting pillar 11 are cylindrical. Both the first heat-conducting pillar 10 and the second heat-conducting pillar 11 are distributed in at least two layers along the axial direction of the first end shell 1 or the second end shell 8, preferably two layers. The first heat-conducting pillar 10 and the second heat-conducting pillar 11 in the same layer are distributed in at least two layers along the circumference of the first end shell 1 or the second end shell 8, preferably six layers. The first heat-conducting pillars 10 or the second heat-conducting pillars 11 in adjacent layers are staggered by 30°. The staggered angle can further enhance the uniformity of heat conduction and enhance the heat dissipation effect.

[0036] In this embodiment, a plurality of heat dissipation fins 9 are provided on the inner side of the first housing 14. The heat dissipation fins 9 are parallel to the cover and are fan-shaped. The angle of the central angle corresponding to the heat dissipation fin 9 does not exceed 90°. The heat dissipation fins 9 are distributed in at least two layers along the axial direction of the first end housing 1 or the second end housing 8, preferably three layers. There are gaps between the heat dissipation fins 9 in adjacent layers. At least two heat dissipation fins 9 in the same layer are distributed along the circumference of the first end housing 1 or the second end housing 8, preferably four layers. There are gaps between the heat dissipation fins 9 in the same layer. An air duct is formed between two heat dissipation fins 9. Combined with the heat dissipation surface provided by the heat dissipation fins 9, the convective heat transfer inside the motor is improved, which plays a role in heat dissipation under steady-state operation of the motor.

[0037] In this embodiment, the winding 3 is composed of multi-turn coils connected according to the corresponding electrical rules. The coils are composed of enameled wire wound on the teeth of the stator core 5. Each phase lead of the winding 3 is integrated into one turn at the lead end according to the principle of proximity and led out from the lead port 7. The winding 3 is composed of three parts: the lead end of the winding 3, the straight section of the winding 3, and the non-lead end of the winding 3.

[0038] In this embodiment, the specific structure of the stator core 5 is determined by the design requirements of the motor, and a general toothed structure is sufficient. The shapes of the first insulating plate 4 and the second insulating plate 6 are the same as the shapes of the laminations of the stator core 5. After the winding 3, the stator core 5, and the corresponding rotor structure are matched, electromagnetic torque can be output and the motor can rotate under reasonable drive and control conditions.

[0039] The stator assembly 100 in this embodiment has a compact structure and simple manufacturing process, and does not occupy the effective structural space of the motor. Through reasonable design of the outer shell structure, it can not only quickly absorb the heat generated by the motor under overload, but also improve the heat dissipation capacity of the motor under steady-state operating conditions. This embodiment increases the filling amount of phase change energy storage material by utilizing the space between the motor end and the shaft and designs heat dissipation fins 9, thereby increasing the space utilization rate of the technical solution. While using phase change energy storage material to enhance the instantaneous heat dissipation capacity of the motor, it also designs additional heat conduction paths and heat dissipation methods for the continuous operation state of the motor, thereby improving the heat dissipation capacity of the motor under continuous operation.

[0040] The first end shell 1 and the second end shell 8 are the main heat absorption components under high overload conditions of the motor, and also the heat dissipation components under steady-state operation of the motor. The phase change energy storage material has a large latent heat during liquefaction, enabling it to store a significant amount of heat without causing a large temperature rise. When the motor experiences a momentary high overload, the first heat-conducting pillar 10 and the second heat-conducting pillar 11 quickly conduct the heat from the winding 3 to the interior of the phase change energy storage material, accelerating the liquefaction of the phase change energy storage material in the inner cavity 12 and the outer cavity 13, absorbing a large amount of heat generated by the winding 3, and reducing the temperature rise of the winding 3. When the motor returns to its rated operating condition, the temperature of the winding 3 decreases, and the phase change energy storage material changes from a liquid state back to a solid state, dissipating the heat. This cycle continues, and the heat dissipation fins 9, the first heat-conducting pillar 10, and the second heat-conducting pillar 11 inhibit the backflow of heat to the stator core 5 during the solidification process of the phase change energy storage material, reducing the thermal load on the motor stator core 5. When the motor operates in continuous operation, the second heat-conducting column 11 in the outer cavity 13 accelerates the conduction of heat from the winding 3 to the outside of the stator assembly 100 for heat dissipation, while the first heat-conducting column 10 in the inner cavity 12 accelerates the conduction of heat to the heat dissipation fins 9 for heat dissipation. Under the action of the first end housing 1 and the second end housing 8, the motor's overload capacity and continuous operation capability are significantly improved.

[0041] Compared with the prior art, the stator assembly 100 of this embodiment has a better heat dissipation effect at the motor end, a faster heat absorption rate, and a higher space utilization rate. Without occupying the effective space of the stator, it improves the continuous working capacity and overload capacity of the motor. It is particularly suitable for improving the heat dissipation performance of high torque density motors and compact motors. The phase change energy storage material is concentrated in the hottest part of the motor: the end. Combined with the function of the first heat-conducting column 10 and the second heat-conducting column 11, the heat absorption rate is significantly improved compared with the prior art. It can quickly absorb heat under overload, improve the reliability and overload multiple of the motor, and completely inherit the effective components of the original motor: stator and rotor, without affecting the electromagnetic structure and mechanical strength of the motor. In this embodiment, the space between the end of winding 3 and the motor shaft, and between the end of winding 3 and the motor housing are utilized, which increases the space utilization rate and the filling amount of phase change energy storage material, and can further improve the instantaneous heat absorption capacity. This embodiment does not occupy the effective space of the motor stator, such as the slot space and the end space, and will not increase the design difficulty of the motor stator in terms of structure, or reduce the design performance of the motor. At the same time, the structure of the first heat-conducting column 10, the second heat-conducting column 11 and the heat dissipation fin 9 in this embodiment will provide additional heat conduction paths and heat dissipation methods when the motor is running continuously, enhancing the continuous heat dissipation capacity of the motor. This embodiment, when used with a corresponding slotted motor, only requires adding a first end housing 1 and a second end housing 8 to the ends of winding 3 to improve the motor's overload capacity and continuous working capability. It can effectively utilize the motor's idle space and basically does not increase the actual height of the stator or the space occupied. It has good adaptability for improving the heat dissipation capacity of high torque density motors and compact motors.

[0042] Example 2

[0043] like Figures 5-8 As shown: This embodiment is applied to a thick air gap motor. In this embodiment, the outer shell structure includes an inner cylinder 18, an outer cylinder 19, and an end cap 20. The inner cylinder 18 is located inside the outer cylinder 19 and is coaxial with the outer cylinder 19. An end cap 20 is provided at each end of the inner cylinder 18. A lead wire port 7 is provided on one end cap 20. The end cap 20 is a double-layer structure formed by an upper cover and a lower cover. The upper cover and the lower cover are concentrically arranged. The outer diameter of the upper cover is the same as the outer diameter of the outer cylinder 19, and the inner diameter of the upper cover is the same as the inner diameter of the inner cylinder 18. The outer diameter of the lower cover is the same as the inner diameter of the outer cylinder 19, and the inner diameter of the lower cover is the same as the outer diameter of the inner cylinder 18. When installing the end cap 20, it can be directly inserted between the inner cylinder 18 and the outer cylinder 19 for easy fixing and sealing installation.

[0044] In this embodiment, the stator core 5 and the winding 3 are both located between the inner cylinder 18 and the outer cylinder 19. The outer diameter of the inner cylinder 18 is the same as the inner diameter of the stator core 5. The two ends of the inner cylinder 18 protrude slightly beyond the windings 3 at both ends, creating a gap between the windings 3 and the end caps 20 to ensure the insulation performance of the entire device. The outer cylinder 19 has the same shape as the inner cylinder 18, and its inner diameter is the same as the outer diameter of the stator core 5. The axial length of the outer cylinder 19 is the same as the axial length of the inner cylinder 18. The first insulating plate 4 is connected to both the inner cylinder 18 and the outer cylinder 19, and the second insulating plate 6 is connected to both the inner cylinder 18 and the outer cylinder 19. The stator core 5, winding 3, first insulating plate 4, and second insulating plate 6 are sealed and enclosed by an outer shell structure. The spaces formed by the inner cylinder 18, outer cylinder 19, one end cap 20, one winding 3, and the first insulating plate 4 are filled with phase change energy storage material. The spaces formed by the inner cylinder 18, outer cylinder 19, another end cap 20, another winding 3, and the second insulating plate 6 are also filled with phase change energy storage material. The space formed by the inner cylinder 18, outer cylinder 19, first insulating plate 4, second insulating plate 6, and stator core 5 is also filled with phase change energy storage material. The volume of the phase change energy storage material in each space is smaller than the volume of the space it occupies. The outer shell structure seals the winding 3, first insulating plate 4, stator core 5, second insulating plate 6, and phase change energy storage material, preventing leakage during liquefaction and ensuring the device's functionality.

[0045] In this embodiment, the stator core 5 is made of silicon steel with excellent magnetic permeability. The stator core 5 is stamped from wire-cut silicon steel sheets and has typical stator teeth and stator slots.

[0046] In this embodiment, winding 3 is composed of multiple coils connected according to corresponding electrical rules. The coils are made of enameled wire wound on the stator teeth. The multi-phase power supply lines of winding 3 are concentrated into a bundle according to the principle of proximity and led out from the lead-out port 7. Winding 3 can generate a rotating magnetomotive force through reasonable driving and control. It can generate a continuous and stable torque output when interacting with the matching motor rotor, driving the rotor to rotate. The stator core 5 provides a flow path for the magnetic field in the motor.

[0047] In this embodiment, both the first insulating plate 4 and the second insulating plate 6 are cut from insulating materials.

[0048] The melting point of phase change energy storage materials is slightly higher than the rated operating temperature of the motor. When the motor's temperature rises due to increased load, the materials can absorb the heat generated by the motor and reduce the temperature rise.

[0049] The stator assembly 100 in this embodiment has a compact structure and simple manufacturing process. The phase change energy storage material can directly contact the heat source, which greatly shortens the heat conduction path, further improves the heat dissipation capacity of the motor under overload conditions, increases the overload multiple of the motor, and also ensures the reliability of the motor operation without any performance loss.

[0050] When the motor is operating in steady state, the phase change energy storage material is solid. When the motor is suddenly overloaded and the temperature of the stator core 5 rises rapidly, the phase change energy storage material quickly absorbs the heat generated by the windings 3 and the stator core 5, turning into a liquid and absorbing a large amount of heat to cool the motor. When the overload ends and the motor returns to its rated operating condition, the motor temperature gradually decreases, and the heat stored in the phase change energy storage material is transferred to the outer surface of the motor through the outer shell structure and dissipated, turning back into a solid state, thus completing the cycle. The difference between each cycle is that, with the increase of the number of cycles, the liquefied phase change energy storage material will gradually flow and accumulate in the stator slots, and the heat conduction path between the windings 3 and the phase change energy storage material will gradually decrease, thus improving the effect of the device in reducing temperature rise and reaching a steady state.

[0051] This embodiment, combined with a thick air gap motor, can effectively improve the motor's overload heat dissipation capacity. It can be used in motors with large air gaps, and is applicable to both slotless and slotted stator structures. It increases the motor's overload multiple and provides a more powerful burst of force. At the same time, the relatively simple structure ensures high reliability and low cost without significantly increasing the occupied volume.

[0052] This embodiment only requires designing an outer shell structure to achieve sealing based on the original stator. The phase change energy storage material is directly filled into the outer shell structure, allowing direct contact with the winding 3 and stator core 5, greatly reducing the heat conduction path and increasing the heat absorption effect. At the same time, this embodiment does not affect the electromagnetic performance and mechanical strength of the motor itself. Therefore, while improving overload heat dissipation, it does not cause performance loss or strength problems. The relatively simple structure also largely ensures the high reliability of the motor and saves maintenance costs.

[0053] Example 3

[0054] This embodiment provides a motor, including a stator assembly 100 as described in Embodiment 1 or Embodiment 2.

[0055] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A stator assembly, characterized in that: The device includes a winding, a stator core, a first insulating plate, a second insulating plate, and a housing structure. The winding is disposed at both ends of the stator core. One end of the stator core is provided with the first insulating plate, and the other end of the stator core is provided with the second insulating plate. The winding is disposed in the housing structure, and the housing structure is filled with phase change energy storage material. The outer casing structure includes a first end casing and a second end casing, which are respectively disposed at both ends of the stator core. Both the first end casing and the second end casing include a first housing, a second housing, a third housing, a fourth housing, and a cover. The cover of the first end casing is provided with a lead-out port. The first housing, the second housing, the third housing, and the fourth housing are coaxially arranged and arranged sequentially from the inside to the outside. The winding is located between the second housing and the third housing. An insulating layer is provided between the winding and the second housing. The space formed by the first housing, the second housing, the cover and the insulating layer of the first end housing or the second end housing is filled with phase change energy storage material. The space formed by the third housing, the fourth housing, the cover and the first insulating plate of the first end housing is filled with phase change energy storage material. The space formed by the third housing, the fourth housing, the cover and the second insulating plate of the second end housing is filled with phase change energy storage material. A plurality of first heat-conducting pillars are provided between the first housing and the second housing, and a plurality of second heat-conducting pillars are provided between the third housing and the fourth housing; The inner side of the first housing is provided with a plurality of heat dissipation fins, which are fan-shaped. The heat dissipation fins are distributed in at least two layers along the axial direction of the first end housing or the second end housing, and there are gaps between the heat dissipation fins in adjacent layers. At least two heat dissipation fins in the same layer are distributed along the circumference of the first end housing or the second end housing, and there are gaps between the heat dissipation fins in the same layer.

2. The stator assembly according to claim 1, characterized in that: There is a gap between the winding and the cover, the outer diameter of the stator core is the same as the outer diameter of the fourth housing, and the cover is located at the outer end of the first housing, the second housing, the third housing and the fourth housing.

3. The stator assembly according to claim 1, characterized in that: The first insulating plate is connected to one of the third housings and one of the fourth housings respectively, the second insulating plate is connected to another of the third housings and another of the fourth housings respectively, and the insulating layer extends to the inner ends of the first housing and the second housing.

4. The stator assembly according to claim 1, characterized in that: One end of the first heat-conducting column is connected to the outer wall of the first housing, the other end of the first heat-conducting column is connected to the inner wall of the second housing, one end of the second heat-conducting column is connected to the outer wall of the third housing, and the other end of the second heat-conducting column is connected to the inner wall of the fourth housing.

5. The stator assembly according to claim 1, characterized in that: The first heat-conducting pillar and the second heat-conducting pillar are each distributed in at least two layers along the axial direction of the first end shell or the second end shell. The first heat-conducting pillar and the second heat-conducting pillar in the same layer are each distributed in at least two layers along the circumferential direction of the first end shell or the second end shell. The first heat-conducting pillars or the second heat-conducting pillars in adjacent layers are staggered.

6. The stator assembly according to claim 1, characterized in that: The outer shell structure includes an inner cylinder, an outer cylinder, and end caps. The inner cylinder is disposed inside the outer cylinder and is coaxial with the outer cylinder. An end cap is disposed at each end of the inner cylinder. The end caps are used to close the space between the inner cylinder and the outer cylinder. A lead wire outlet is provided on one of the end caps.

7. The stator assembly according to claim 6, characterized in that: The stator core and the winding are both located between the inner cylinder and the outer cylinder. There is a gap between the winding and the end cover. The first insulating plate is connected to the inner cylinder and the outer cylinder respectively. The second insulating plate is connected to the inner cylinder and the outer cylinder respectively. The space formed by the inner cylinder, the outer cylinder, one end cover, one winding and the first insulating plate is filled with phase change energy storage material. The space formed by the inner cylinder, the outer cylinder, another end cover, another winding and the second insulating plate is filled with phase change energy storage material. The space formed by the inner cylinder, the outer cylinder, the first insulating plate, the second insulating plate and the stator core is filled with phase change energy storage material.

8. An electric motor, characterized in that: Includes the stator assembly as described in any one of claims 1-7.

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