High-efficiency phase change cooling structure of solid rotor of high-speed asynchronous motor
By using the combined structure of phase change heat transfer plate and rotor copper strip and the heat dissipation groove rib design in the solid rotor of the high-speed asynchronous motor, an efficient heat transfer path is constructed, which solves the problem of the increase in the rotor temperature of the high-speed asynchronous motor and achieves the temperature reduction Effects above 40K.
Patent Information
- Application Number
- CN202421029193.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-13
AI Technical Summary
The solid rotor of high-speed asynchronous motors has serious eddy current losses and wind and friction losses due to high speed. Traditional cooling structures have problems such as heat pipes and iron cores, cooling mediums, and complex sealing structures, making it difficult to effectively reduce the rotor temperature.
An efficient phase change cooling structure including a rotor core, a phase change heat transfer plate and a rotor copper bar was designed. An efficient heat transfer path was constructed through a combined structure of a phase change heat transfer plate and a rotor copper bar, and a high efficiency heat transfer path was set on the rotor end ring. The heat dissipation grooves and heat dissipation ribs provide sufficient heat dissipation conditions and thermal conductivity.
The temperature of the rotor copper strip and iron core has been reduced by more than 40K, which improves the safety and service life of the motor, and solves the problems of long heat transfer paths, many cooling media, and complex sealing structures in traditional cooling structures.
Smart Images
Figure CN222282894U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motors, and particularly relates to a high-efficiency phase-change cooling structure for a solid rotor of a high-speed asynchronous motor. Background Art
[0002] High-speed asynchronous motors have the advantages of small size, high power density, and the ability to be directly connected to high-speed loads. However, due to the high speed of the motor, conventional laminated rotors are unable to withstand the huge centrifugal force, so solid rotors have become a commonly used structural type in high-speed motors.
[0003] Due to the high speed and frequency of solid rotor motors, a large amount of eddy current loss and wind friction loss will be generated on the rotor surface during actual operation. Under the condition of very limited heat dissipation conditions on the rotor surface, the temperature of the rotor core and copper bars can reach 200-300°C, which poses a serious hidden danger to the safe operation of the motor.
[0004] The phase change heat transfer method based on heat pipes or cold plates has the significant advantages of excellent heat transfer effect and good temperature uniformity. In order to reduce the temperature of the motor heating components, many designers have invented a motor stator and rotor heat dissipation structure based on phase change. The patent "Cooling system of asynchronous motor" discloses a laminated rotor heat dissipation structure based on heat pipes, which inserts the heat pipe into the rotor core axially, and the end of the heat pipe is connected to the short-circuit ring. The large-area short-circuit ring acts as a condenser for the heat pipe, thereby achieving efficient heat transfer. However, the structure provided by the patent may have poor contact between the heat pipe and the core, and between the heat pipe and the short ring, resulting in a decrease in the heat transfer effect. The patent "Permanent magnet excitation motor with rotor heat dissipation device" discloses a structure for reducing the temperature of the permanent magnet motor rotor, which places a cooling medium in the sealed cavity formed by the hollow shaft. When the motor is working, the rotor heat is transferred to the cooling medium and vaporized, and then condensed in the output drive shaft area with a lower temperature, thereby forming radial and axial heat transfer. However, this structure has the disadvantages of a long heat transfer path, a large amount of required cooling medium, and a complex sealing structure. The patent "A solid rotor permanent magnet motor with a cooling structure" adopts a hollow conductor bar and hollow end ring structure with built-in coolant. The heat of the motor rotor can be taken away through the circulation of the coolant, thereby effectively reducing the temperature rise of the rotor, reducing the average temperature of the motor, and increasing the service life of the permanent magnet. This structure is not suitable for the solid rotor structure of the motor itself with end rings. The patent "A motor heat dissipation structure based on a new type of deformation heat pipe and its manufacturing method" utility model has a heat dissipation array surrounding the outer surface of the copper wire winding at the end of the stator. The heat dissipation array is respectively attached to the copper wire winding and the liquid cooling shell, so as to significantly improve the heat dissipation of the internal winding of the permanent magnet synchronous motor. This structure may have a situation where the heat dissipation array is not in good contact with the copper wire winding, thereby affecting the heat dissipation, and is mainly used for cooling the end of the stator winding. Utility Model Content
[0005] In order to solve the above problems existing in the prior art, the purpose of the utility model is to provide a high-efficiency phase change cooling structure of a solid rotor of a high-speed asynchronous motor with good cooling effect.
[0006] The technical solution adopted by the utility model is:
[0007] The invention discloses an efficient phase change cooling structure for a solid rotor of a high-speed asynchronous motor, comprising a rotor core, a plurality of rotor slots evenly distributed on the circumferential surface of the rotor core, phase change heat transfer plates arranged in the rotor slots, and rotor copper bars arranged in the phase change heat transfer plates; both ends of the rotor core are connected to rotor end rings, the phase change heat transfer plates and the rotor copper bars are connected to the rotor end rings, and the rotor end rings are provided with heat dissipation grooves and heat dissipation ribs.
[0008] The utility model builds a high-efficiency heat transfer path for the solid rotor through the combined structure of the phase change heat transfer plate and the rotor copper bar. The phase change heat transfer plate has good contact and sufficient heat dissipation area with the rotor copper bar and the rotor core, thereby building a high-efficiency heat transfer path from the rotor core and the rotor copper bar to the rotor end ring. The heat dissipation grooves and heat dissipation ribs on the surface of the rotor end ring provide sufficient heat dissipation conditions and sufficient thermal conductivity, which can reduce the temperature of the rotor copper bar and the rotor core by more than 40K.
[0009] As a preferred embodiment of the utility model, the phase-change heat transfer plate is in the shape of a groove with an outer opening, and a single rotor copper bar is arranged in the phase-change heat transfer plate. After the rotor core is processed, the phase-change heat transfer plate with an outer opening is first placed in the rotor groove. The phase-change heat transfer plate is a hollow structure filled with an evaporative cooling medium. The vertical plate and the bottom plate of the phase-change heat transfer plate can be integrally formed or integrally formed by welding to ensure no leakage. After all surfaces of the phase-change heat transfer plate are evenly coated with a high thermal conductivity material with a certain viscosity, the rotor copper bar is placed in the concave groove of the phase-change heat transfer plate along the axial direction or radial direction, and the rotor core, the phase-change heat transfer plate and the rotor copper bar are welded into a whole at the end and the outer edge of the straight section.
[0010] As a preferred embodiment of the utility model, the phase-change heat transfer plate is in the shape of a mountain, and two rotor copper bars are arranged in two grooves of the phase-change heat transfer plate. After the rotor core is processed, the mountain-shaped phase-change heat transfer plate is first placed in the groove. The phase-change heat transfer plate is a hollow structure filled with evaporative cooling medium. The vertical plate and the bottom plate of the phase-change heat transfer plate can be integrally formed or integrally formed by welding to ensure no leakage. After all surfaces of the phase-change heat transfer plate are evenly coated with a high-thermal conductivity material with a certain viscosity, the left and right rotor copper bars are placed in the concave groove of the phase-change heat transfer plate along the axial direction or radial direction, and the rotor core, the phase-change heat transfer plate and the rotor copper bars are welded into a whole at the end and the outer edge of the straight section.
[0011] As a preferred embodiment of the utility model, the phase-change heat transfer plate is in the shape of a groove with a convex strip at the bottom, a single rotor copper bar is arranged in the phase-change heat transfer plate, and the rotor copper bar is provided with a rectangular groove matched with the convex strip. After the rotor core is processed, the groove is first placed in the groove with a groove-shaped phase-change heat transfer plate with a convex strip at the bottom. The phase-change heat transfer plate is a hollow structure filled with evaporative cooling medium. The vertical plate, bottom plate and convex strip of the phase-change heat transfer plate can be integrally formed or integrally formed by welding to ensure no leakage. A rectangular groove is processed in the small position of the rotor copper bar. The width of the rectangular groove is slightly larger than the width of the convex strip of the phase-change heat transfer plate, the depth is the same, and the groove is axially connected. After the high thermal conductivity material with a certain viscosity is evenly applied to all surfaces of the phase-change heat transfer plate, the rotor copper bar and the phase-change heat transfer plate are positioned by matching the rectangular groove and the convex strip of the phase-change heat transfer plate. The rotor core, the phase-change heat transfer plate and the rotor copper bar are welded into a whole at the end and the outer edge of the straight section.
[0012] As a preferred solution of the utility model, heat dissipation grooves are provided on the circumferential surface and the end surface of the rotor end ring.
[0013] As a preferred solution of the utility model, the width of the heat dissipation groove is 3-5 mm, the depth of the heat dissipation groove is 3-5 mm, and the spacing between adjacent heat dissipation grooves on the same surface of the rotor end ring is 6-10 mm.
[0014] As a preferred solution of the utility model, the cross-sectional shape of the rotor end ring is L-shaped, and the heat dissipation ribs are arranged along the L-shaped recessed portion of the rotor end ring.
[0015] As a preferred solution of the utility model, the shape of the heat dissipation rib is L-shaped. The heat dissipation rib and the rotor end ring are perpendicular to each other.
[0016] As a preferred solution of the utility model, the phase change heat transfer plate and the rotor copper bar are aligned in the axial direction.
[0017] As a preferred solution of the utility model, the phase change heat transfer plate and the rotor copper bar are respectively parallel to or have an angle with the axial direction of the rotor core.
[0018] The beneficial effects of the utility model are:
[0019] The utility model builds a high-efficiency heat transfer path for the solid rotor through the combined structure of the phase change heat transfer plate and the rotor copper bar. The phase change heat transfer plate has good contact and sufficient heat dissipation area with the rotor copper bar and the rotor core, thereby building a high-efficiency heat transfer path from the rotor core and the rotor copper bar to the rotor end ring. The heat dissipation grooves and heat dissipation ribs on the surface of the rotor end ring provide sufficient heat dissipation conditions and sufficient thermal conductivity, which can reduce the temperature of the rotor copper bar and the rotor core by more than 40K. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of the utility model;
[0021] Figure 2 yes Figure 1 A partial enlarged view of the middle A;
[0022] Figure 3 It is a schematic diagram of the structure of the rotor core;
[0023] Figure 4 is a schematic diagram of the structure of the phase change heat transfer plate and the rotor copper bar in Example 1;
[0024] Figure 5 is a schematic diagram of the structure of the phase change heat transfer plate and the rotor copper bar in Example 2;
[0025] Figure 6 is a schematic diagram of the structure of the phase change heat transfer plate and the rotor copper bar in Example 3;
[0026] Figure 7 is a schematic diagram of the structure of the rotor copper bars in Example 3;
[0027] Figure 8 Schematic diagram of the structure of the phase change heat transfer plate in Example 3.
[0028] In the figure: 1- rotor core; 2- rotor end ring; 3- heat dissipation ribs; 4- rotor copper bars; 5- phase change heat transfer plate; 6- heat dissipation groove; 7- rotor slot; 8- rectangular slot; 9- convex strip. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.
[0031] Embodiment 1:
[0032] like Figure 1 to Figure 4As shown, the high-efficiency phase change cooling structure of the solid rotor of the high-speed asynchronous motor of this embodiment includes a rotor core 1, a plurality of rotor slots 7 are evenly distributed on the circumferential surface of the rotor core 1, phase change heat transfer plates 5 are arranged in the rotor slots 7, and rotor copper bars 4 are arranged in the phase change heat transfer plates 5; both ends of the rotor core 1 are connected to rotor end rings 2, the phase change heat transfer plates 5 and the rotor copper bars 4 are both connected to the rotor end rings 2, and heat dissipation grooves 6 are arranged on the circumferential surface and end surface of the rotor end ring 2.
[0033] The utility model constructs a high-efficiency heat transfer path for the solid rotor through the combined structure of the phase change heat transfer plate 5 and the rotor copper bar 4. The phase change heat transfer plate 5 has good contact and sufficient heat dissipation area with the rotor copper bar 4 and the rotor core 1, thereby constructing a high-efficiency heat transfer path from the rotor core 1 and the rotor copper bar 4 to the rotor end ring 2. The heat dissipation grooves 6 and the heat dissipation ribs 3 on the surface of the rotor end ring 2 provide sufficient heat dissipation conditions and sufficient thermal conductivity, which can reduce the temperature of the rotor copper bar 4 and the rotor core 1 by more than 40K.
[0034] The rotor core 1 is processed with a certain number of rotor slots 7, which are evenly arranged along the circumferential direction and penetrated axially, and the direction is parallel to or at a certain angle with the center line of the motor shaft. The rotor copper bars 4 and the phase change heat transfer plates 5 are arranged in the rotor slots 7, and the phase change heat transfer plates 5 and the rotor copper bars 4 have exactly the same axial extension direction, which can be parallel to or inclined at a certain angle with the motor axis.
[0035] The phase-change heat transfer plate 5 is in the shape of a groove with an outer opening, and a single rotor copper bar 4 is arranged in the phase-change heat transfer plate 5. After the rotor core 1 is processed, the phase-change heat transfer plate 5 with an outer opening is first placed in the rotor slot 7. The phase-change heat transfer plate 5 is a hollow structure filled with an evaporative cooling medium. The vertical plate and the bottom plate of the phase-change heat transfer plate 5 can be integrally formed or integrally formed by welding to ensure no leakage. After the high thermal conductivity material with a certain viscosity is evenly applied to all surfaces of the phase-change heat transfer plate 5, the rotor copper bar 4 is placed in the concave groove of the phase-change heat transfer plate 5 along the axial direction or radial direction, and the rotor core 1, the phase-change heat transfer plate 5 and the rotor copper bar 4 are welded into a whole at the end and the outer edge of the straight section.
[0036] The rotor end ring 2 is generally cylindrical at first, and the material is copper or aluminum. The cylindrical rotor end ring 2 is processed into a circumferential rotating body with an L-shaped cross-section. The specific size of the L-shaped rotor end ring 2 is determined by the conductive area of the end ring, the heat dissipation conditions and the strength required for high-speed rotation. Then, a certain number of annular heat dissipation grooves 6 with a width and depth of 3 to 5 mm are processed on the circumferential surface and end surface of the L-shaped rotor end ring 2. The spacing between adjacent heat dissipation grooves 6 on the same surface of the rotor end ring 2 is 6 to 10 mm.
[0037] The bottom surface of the L-shaped rotor end ring 2 is welded to the rotor copper bar 4 axially extending out of the rotor core 1 and the end of the phase change heat transfer plate 5, and then a certain number of L-shaped heat dissipation ribs 3 are welded to the L-shaped plane of the rotor end ring 2, and the two are perpendicular to each other.
[0038] Embodiment 2:
[0039] like Figure 1 to Figure 3 and Figure 5 As shown, the high-efficiency phase change cooling structure of the solid rotor of the high-speed asynchronous motor of this embodiment includes a rotor core 1, a plurality of rotor slots 7 are evenly distributed on the circumferential surface of the rotor core 1, phase change heat transfer plates 5 are arranged in the rotor slots 7, and rotor copper bars 4 are arranged in the phase change heat transfer plates 5; both ends of the rotor core 1 are connected to rotor end rings 2, the phase change heat transfer plates 5 and the rotor copper bars 4 are both connected to the rotor end rings 2, and heat dissipation grooves 6 are arranged on the circumferential surface and end surface of the rotor end ring 2.
[0040] The utility model constructs a high-efficiency heat transfer path for the solid rotor through the combined structure of the phase change heat transfer plate 5 and the rotor copper bar 4. The phase change heat transfer plate 5 has good contact and sufficient heat dissipation area with the rotor copper bar 4 and the rotor core 1, thereby constructing a high-efficiency heat transfer path from the rotor core 1 and the rotor copper bar 4 to the rotor end ring 2. The heat dissipation grooves 6 and the heat dissipation ribs 3 on the surface of the rotor end ring 2 provide sufficient heat dissipation conditions and sufficient thermal conductivity, which can reduce the temperature of the rotor copper bar 4 and the rotor core 1 by more than 40K.
[0041] The rotor core 1 is processed with a certain number of rotor slots 7, which are evenly arranged along the circumferential direction and penetrated axially, and the direction is parallel to or at a certain angle with the center line of the motor shaft. The rotor copper bars 4 and the phase change heat transfer plates 5 are arranged in the rotor slots 7, and the phase change heat transfer plates 5 and the rotor copper bars 4 have exactly the same axial extension direction, which can be parallel to or inclined at a certain angle with the motor axis.
[0042] The phase change heat transfer plate 5 is in the shape of a mountain, and two rotor copper bars 4 are arranged in two grooves of the phase change heat transfer plate 5. After the rotor core 1 is processed, the mountain-shaped phase change heat transfer plate 5 is first placed in the groove. The phase change heat transfer plate 5 is a hollow structure filled with evaporative cooling medium. The vertical plate and the bottom plate of the phase change heat transfer plate 5 can be integrally formed or integrally formed by welding to ensure no leakage. After the high thermal conductivity material with a certain viscosity is evenly applied to all surfaces of the phase change heat transfer plate 5, the left and right rotor copper bars 4 are placed in the concave grooves of the phase change heat transfer plate 5 along the axial direction or radial direction, and the rotor core 1, the phase change heat transfer plate 5 and the rotor copper bars 4 are welded into a whole at the end and the outer edge of the straight section.
[0043] The rotor end ring 2 is generally cylindrical at first, and the material is copper or aluminum. The cylindrical rotor end ring 2 is processed into a circumferential rotating body with an L-shaped cross-section. The specific size of the L-shaped rotor end ring 2 is determined by the conductive area of the end ring, the heat dissipation conditions and the strength required for high-speed rotation. Then, a certain number of annular heat dissipation grooves 6 with a width and depth of 3 to 5 mm are processed on the circumferential surface and end surface of the L-shaped rotor end ring 2. The spacing between adjacent heat dissipation grooves 6 on the same surface of the rotor end ring 2 is 6 to 10 mm.
[0044] The bottom surface of the L-shaped rotor end ring 2 is welded to the rotor copper bar 4 axially extending out of the rotor core 1 and the end of the phase change heat transfer plate 5, and then a certain number of L-shaped heat dissipation ribs 3 are welded to the L-shaped plane of the rotor end ring 2, and the two are perpendicular to each other.
[0045] Embodiment 3:
[0046] like Figure 1 to Figure 3 , Figure 6 to Figure 8 As shown, the high-efficiency phase change cooling structure of the solid rotor of the high-speed asynchronous motor of this embodiment includes a rotor core 1, a plurality of rotor slots 7 are evenly distributed on the circumferential surface of the rotor core 1, phase change heat transfer plates 5 are arranged in the rotor slots 7, and rotor copper bars 4 are arranged in the phase change heat transfer plates 5; both ends of the rotor core 1 are connected to rotor end rings 2, the phase change heat transfer plates 5 and the rotor copper bars 4 are both connected to the rotor end rings 2, and heat dissipation grooves 6 are arranged on the circumferential surface and end surface of the rotor end ring 2.
[0047] The utility model constructs a high-efficiency heat transfer path for the solid rotor through the combined structure of the phase change heat transfer plate 5 and the rotor copper bar 4. The phase change heat transfer plate 5 has good contact and sufficient heat dissipation area with the rotor copper bar 4 and the rotor core 1, thereby constructing a high-efficiency heat transfer path from the rotor core 1 and the rotor copper bar 4 to the rotor end ring 2. The heat dissipation grooves 6 and the heat dissipation ribs 3 on the surface of the rotor end ring 2 provide sufficient heat dissipation conditions and sufficient thermal conductivity, which can reduce the temperature of the rotor copper bar 4 and the rotor core 1 by more than 40K.
[0048] The rotor core 1 is processed with a certain number of rotor slots 7, which are evenly arranged along the circumferential direction and penetrated axially, and the direction is parallel to or at a certain angle with the center line of the motor shaft. The rotor copper bars 4 and the phase change heat transfer plates 5 are arranged in the rotor slots 7, and the phase change heat transfer plates 5 and the rotor copper bars 4 have exactly the same axial extension direction, which can be parallel to or inclined at a certain angle with the motor axis.
[0049] The phase-change heat transfer plate 5 is in the shape of a groove with a convex strip 9 at the bottom. A single rotor copper bar 4 is arranged in the phase-change heat transfer plate 5, and the rotor copper bar 4 is provided with a rectangular groove 8 that matches the convex strip 9. After the rotor core 1 is processed, the groove-shaped phase-change heat transfer plate 5 with a convex strip 9 at the bottom is first placed in the groove. The phase-change heat transfer plate 5 is a hollow structure filled with evaporative cooling medium. The vertical plate, bottom plate and convex strip 9 of the phase-change heat transfer plate 5 can be integrally formed or integrally formed by welding to ensure no leakage. A rectangular groove 8 is processed in a small position of the rotor copper bar 4. The width of the rectangular groove 8 is slightly larger than the width of the convex strip 9 of the phase-change heat transfer plate 5, the depth is the same, and the groove is axially through. After the high thermal conductivity material with a certain viscosity is evenly applied to all surfaces of the phase-change heat transfer plate 5, the rotor copper bar 4 and the phase-change heat transfer plate 5 are positioned by matching the rectangular groove 8 and the convex strip 9 of the phase-change heat transfer plate 5. The rotor core 1, the phase change heat transfer plate 5 and the rotor copper bar 4 are welded into a whole at the end and the outer edge of the straight section.
[0050] The rotor end ring 2 is generally cylindrical at first, and the material is copper or aluminum. The cylindrical rotor end ring 2 is processed into a circumferential rotating body with an L-shaped cross-section. The specific size of the L-shaped rotor end ring 2 is determined by the conductive area of the end ring, the heat dissipation conditions and the strength required for high-speed rotation. Then, a certain number of annular heat dissipation grooves 6 with a width and depth of 3 to 5 mm are processed on the circumferential surface and end surface of the L-shaped rotor end ring 2. The spacing between adjacent heat dissipation grooves 6 on the same surface of the rotor end ring 2 is 6 to 10 mm.
[0051] The bottom surface of the L-shaped rotor end ring 2 is welded to the rotor copper bar 4 axially extending out of the rotor core 1 and the end of the phase change heat transfer plate 5, and then a certain number of L-shaped heat dissipation ribs 3 are welded to the L-shaped plane of the rotor end ring 2, and the two are perpendicular to each other.
[0052] The present utility model is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present utility model fall within the protection scope of the present utility model.
Claims
1. High-efficiency phase change cooling structure for high-speed asynchronous motor solid rotor, characterized by: The invention comprises a rotor core (1), a plurality of rotor slots (7) are evenly distributed on the circumferential surface of the rotor core (1), a phase change heat transfer plate (5) is arranged in the rotor slot (7), and a rotor copper bar (4) is arranged in the phase change heat transfer plate (5); both ends of the rotor core (1) are connected to a rotor end ring (2), the phase change heat transfer plate (5) and the rotor copper bar (4) are both connected to the rotor end ring (2), and the rotor end ring (2) is provided with a heat dissipation groove (6) and a heat dissipation rib (3).
2. The high-efficiency phase change cooling structure for a high-speed asynchronous motor solid rotor according to claim 1 is characterized in that: The phase-change heat transfer plate (5) is in the shape of a groove with an outer opening, and a single rotor copper bar (4) is arranged inside the phase-change heat transfer plate (5).
3. The high-efficiency phase change cooling structure for a high-speed asynchronous motor solid rotor according to claim 1 is characterized in that: The phase-change heat transfer plate (5) is in the shape of a mountain, and the two rotor copper bars (4) are respectively arranged in two grooves of the phase-change heat transfer plate (5).
4. The high-efficiency phase change cooling structure for a high-speed asynchronous motor solid rotor according to claim 1 is characterized in that: The phase-change heat transfer plate (5) is in the shape of a groove with a convex strip (9) provided at the bottom. A single rotor copper bar (4) is arranged in the phase-change heat transfer plate (5). The rotor copper bar (4) is provided with a rectangular groove (8) that matches the convex strip (9).
5. The high-efficiency phase change cooling structure for a high-speed asynchronous motor solid rotor according to claim 1 is characterized in that: Heat dissipation grooves (6) are provided on the circumferential surface and the end surface of the rotor end ring (2).
6. The high-efficiency phase change cooling structure for a high-speed asynchronous motor solid rotor according to claim 5, characterized in that: The width of the heat dissipation groove (6) is 3-5 mm, the depth of the heat dissipation groove (6) is 3-5 mm, and the spacing between adjacent heat dissipation grooves (6) on the same surface of the rotor end ring (2) is 6-10 mm.
7. The high-efficiency phase change cooling structure for a high-speed asynchronous motor solid rotor according to claim 1, characterized in that: The cross-sectional shape of the rotor end ring (2) is L-shaped, and the heat dissipation ribs (3) are arranged along the L-shaped recessed portion of the rotor end ring (2).
8. The high-efficiency phase change cooling structure for a high-speed asynchronous motor solid rotor according to claim 7, characterized in that: The heat dissipation rib (3) is in an L-shape.
9. The high-efficiency phase change cooling structure for a high-speed asynchronous motor solid rotor according to claim 1, characterized in that: The phase change heat transfer plate (5) and the rotor copper bar (4) are aligned in the axial direction.
10. The high-efficiency phase change cooling structure for a high-speed asynchronous motor solid rotor according to any one of claims 1 to 9, characterized in that: The phase change heat transfer plate (5) and the rotor copper bar (4) are respectively parallel to the axial direction of the rotor core (1) or have an included angle therewith.