A heat dissipation structure of a permanent magnet motor

Abstract

This utility model discloses a heat dissipation structure for a permanent magnet motor, comprising: a passive heat dissipation component attached to the surface of the permanent magnet motor; a water cooling component surrounding the passive heat dissipation component; a circulation section including a micro water pump and an arc-shaped connecting pipe connected to the micro water pump, the arc-shaped connecting pipe being in communication with the water cooling component; and an air cooling component for cooling the arc-shaped connecting pipe. Through the synergistic effect of the three heat dissipation mechanisms of passive heat dissipation, water cooling circulation, and air cooling assistance, the heat dissipation efficiency of the permanent magnet motor is significantly improved, the motor life is extended, and the safety performance is optimized.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to a heat dissipation structure for a permanent magnet motor. Background Technology

[0002] With the rapid development of new energy vehicles, industrial automation and other fields, permanent magnet motors have been widely used due to their advantages such as high power density, high efficiency and low energy consumption. However, during high-load operation, the copper losses in the stator windings, the iron losses in the core, and the eddy current losses in the rotor permanent magnets of permanent magnet motors will generate a lot of heat. If this heat cannot be dissipated in time, it will lead to excessively high motor temperature, which in turn will cause problems such as demagnetization of permanent magnets and aging of insulation materials, seriously affecting the performance and service life of the motor.

[0003] Chinese patent CN219717998U discloses a heat-dissipating motor, which includes a protective component, a dustproof component, and a cooling component. The cooling component uses a circulating pump to transfer coolant from a storage tank to a cooling pipe, which then returns to the storage tank. When coolant flows through the cooling pipe, it cools the air inside the dustproof housing. This cooled air, combined with the fan blades, flows towards the motor, dissipating heat. However, this cooling component first cools the air before the fan blades reach the motor, resulting in low thermal conductivity, which is insufficient to meet the heat dissipation requirements of high-power-density motors.

[0004] Therefore, it is necessary to develop a heat dissipation structure for permanent magnet motors to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a heat dissipation structure for a permanent magnet motor with good heat dissipation performance.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heat dissipation structure for a permanent magnet motor, comprising:

[0007] Passive heat dissipation components that are attached to the surface of a permanent magnet motor;

[0008] Water-cooled components surround the passive heat dissipation components;

[0009] The circulation section includes a miniature water pump and an arc-shaped connecting pipe connected to the miniature water pump, the arc-shaped connecting pipe being in communication with the water-cooling assembly;

[0010] The air-cooled component cools the arc-shaped connecting pipe.

[0011] Furthermore, the passive heat dissipation component includes a heat-conducting ring, which includes a first heat-conducting half-ring and a second heat-conducting half-ring, and the first heat-conducting half-ring and the second heat-conducting half-ring are tightly attached to the outer surface of the permanent magnet motor.

[0012] Furthermore, the surface of the heat-conducting ring is provided with outwardly protruding heat dissipation dorsal fins.

[0013] Furthermore, a first receiving gap is formed between adjacent heat dissipation dorsal fins, and the water cooling assembly includes an arc-shaped copper tube, which is embedded in the first receiving gap.

[0014] Furthermore, the passive heat dissipation component includes a connecting component, which includes a mating plate disposed on the end faces of the first heat-conducting semi-ring and the second heat-conducting semi-ring, a connecting plate fixedly connected to the mating plate, and a fixing bolt. The connecting plate is fixedly connected to the mating plate fixed on the end faces of the first heat-conducting semi-ring and the second heat-conducting semi-ring, respectively, and the fixing bolt passes through the connecting plate.

[0015] Furthermore, a second receiving gap is formed between the two ends of the heat dissipation dorsal fin and the docking plate. The water cooling assembly includes a transverse connecting pipe, which is disposed within the second receiving gap and communicates with both ends of the arc-shaped copper pipe.

[0016] Furthermore, the circulation section includes a docking cannula, which communicates with the transverse connecting tube, and a sealing gasket is provided at the connection point.

[0017] Furthermore, the air-cooling assembly includes a mounting ring and fan blades driven by the permanent magnet motor, with the fan blades fixed to the surface of the mounting ring and rotating to generate airflow.

[0018] Furthermore, the inner wall of the heat-conducting ring is coated with an insulating coating.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is a heat dissipation structure for a permanent magnet motor, which has the characteristics of good heat dissipation effect. Through the synergistic effect of passive heat dissipation, water cooling circulation and air cooling auxiliary triple heat dissipation mechanism, the heat dissipation efficiency of the permanent magnet motor is significantly improved, the motor life is extended and the safety performance is optimized. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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 these drawings without creative effort, wherein:

[0021] Figure 1 This is a three-dimensional structural diagram of a heat dissipation structure for a permanent magnet motor according to the present invention.

[0022] Figure 2 for Figure 1 A schematic diagram of the passive heat dissipation component structure of the permanent magnet motor shown.

[0023] Figure 3 for Figure 1 A schematic diagram of the water-cooling components and circulation section of the heat dissipation structure of the permanent magnet motor shown.

[0024] Figure 4 for Figure 2 A partial structural diagram of the passive heat dissipation component of the heat dissipation structure of the permanent magnet motor shown.

[0025] In the diagram: 1. Permanent magnet motor; 11. Permanent magnet motor body; 12. Support leg; 13. Motor output shaft; 2. Mounting plate; 21. Through hole; 3. Passive heat dissipation assembly; 31. Heat-conducting ring; 311. First heat-conducting half-ring; 312. Second heat-conducting half-ring; 32. Connecting assembly; 321. Butt plate; 322. Connecting plate; 323. Fixing bolt; 33. Heat dissipation dorsal fin; 34. First receiving gap; 35. Second receiving gap; 4. Water cooling assembly; 41. Arc-shaped copper pipe; 42. Horizontal connecting pipe; 5. Circulation part; 51. Miniature water pump; 52. Arc-shaped connecting pipe; 53. Butt insertion pipe; 54. Sealing gasket; 6. Air cooling assembly; 61. Mounting ring; 62. Fan blade. Detailed Implementation

[0026] 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.

[0027] Please refer to Figure 1 This utility model is a heat dissipation structure for a permanent magnet motor, which is installed on the permanent magnet motor 1.

[0028] Please refer to Figure 1 To facilitate the explanation of this utility model, the structure of the permanent magnet motor is briefly described. The permanent magnet motor 1 includes a permanent magnet motor body 11, a support leg 12 supporting the permanent magnet motor body 11, and a motor output shaft 13 connected to the permanent magnet motor body 11. In this embodiment, the support leg 12 supports the permanent magnet motor body 11 to maintain a horizontal state, and the motor output shaft 13 extends outward from one end of the permanent magnet motor body 11.

[0029] Please refer to Figures 1 to 4 A heat dissipation structure for a permanent magnet motor includes a mounting plate 2 fixedly installed at one end of the permanent magnet motor body 11, a passive heat dissipation component 3 surrounding the permanent magnet motor body 11, a water cooling component 4 surrounding the passive heat dissipation component 3, and a circulation part 5 communicating with the water cooling component 4.

[0030] Please refer to Figures 1 to 2 and Figure 4The passive heat dissipation component 3 includes a heat-conducting ring 31 and a connecting component 32 for fixing the heat-conducting ring 31. The heat-conducting ring 31 surrounds the permanent magnet motor body 11, and its surface is attached to the outer surface of the permanent magnet motor body 11. Specifically, the heat-conducting ring 31 includes a first heat-conducting half-ring 311 and a second heat-conducting half-ring 312. The first heat-conducting half-ring 311 and the second heat-conducting half-ring 312 have the same structure, and the two are joined together to form a complete heat-conducting ring 31, which surrounds the permanent magnet motor body 11. The connecting assembly 32 includes a docking plate 321, a connecting plate 322 fixedly connected to the docking plate 321, and a fixing bolt 323. There are two sets of docking plates 321. One set of docking plates 321 is installed on the end face of the first heat-conducting semi-ring 311, and the other set of docking plates 321 is installed on the end face of the second heat-conducting semi-ring 312. One end of the docking plate 321 is fixedly connected to the end face of the first heat-conducting semi-ring 311 and the second heat-conducting semi-ring 312 respectively, and the other end extends radially outward. The connecting plate 322 is fixedly connected to the docking plate 321 fixed to the end face of the first heat-conducting semi-ring 311 and the second heat-conducting semi-ring 312 respectively. The fixing bolt 323 passes through the connecting plate 322, so that the first heat-conducting semi-ring 311 and the second heat-conducting semi-ring 312 are securely fitted onto the permanent magnet motor body 11.

[0031] Preferably, heat dissipation dorsal fins 33 are formed on the surface of the heat-conducting ring 31. The heat dissipation dorsal fins 33 protrude outward from the surface of the heat-conducting ring 31 and surround the surface of the heat-conducting ring 31. The number of heat dissipation dorsal fins 33 can be varied according to requirements, and they are distributed at intervals from one end of the heat-conducting ring 31 to the other end. A first receiving gap 34 is formed between adjacent heat dissipation dorsal fins 33. In addition, both ends of the heat dissipation dorsal fins 33 are spaced apart from the mating plate 321 to form a second receiving gap 35. The second receiving gap 35 and the first receiving gap 34 are connected.

[0032] Please refer to Figure 1 and Figure 3 The water-cooling assembly 4 includes an arc-shaped copper tube 41 and a horizontal connecting tube 42. The number of arc-shaped copper tubes 41 can be changed according to the requirements and they are installed one by one in the first receiving gap 34. The horizontal connecting tube 42 is installed in the second receiving gap 35. The two ends of the arc-shaped copper tube 41 are connected to the horizontal connecting tube 42.

[0033] Please refer to Figure 1 and Figure 3 The circulation section 5 includes a micro water pump 51, an arc-shaped connecting pipe 52, and a docking pipe 53. The micro water pump 51 is threadedly installed on both sides of the mounting plate 2 away from the permanent magnet motor body 11. The mounting plate 2 has a through hole 21. There are two sets of arc-shaped connecting pipes 52. The two sets of arc-shaped connecting pipes 52 are respectively threadedly installed on the output end and input end of the micro water pump 51, and the other end is connected to the docking pipe 53. The docking pipe 53 passes through the through hole 21 and is connected to the transverse connecting pipe 42. A sealing gasket 54 is provided at the connection between the docking pipe 53 and the transverse connecting pipe 42.

[0034] Please refer to Figure 1 Preferably, the motor output shaft 13 is fitted with a wind-cooling assembly 6, which includes a mounting ring 61 and a fan blade 62. The mounting ring 61 is fixedly installed on one side of the surface of the motor output shaft 13, and the surface of the mounting ring 61 is fixedly installed with the fan blade 62. The cooperation between the mounting ring 61 and the fan blade 62 enables the motor output shaft 13 to rotate and generate airflow to cool the coolant passing through the arc-shaped connecting pipe 52.

[0035] Preferably, the inner wall of the heat-conducting ring 31 is coated with an insulating coating. The application of the insulating coating can prevent leakage of electricity in the permanent magnet motor body 11 during use, thus ensuring the safe use of the permanent magnet motor body 11.

[0036] When the heat dissipation structure of the permanent magnet motor of this utility model is in use, the heat generated by the permanent magnet motor body 11 during operation is conducted through the outer surface to the tightly fitted heat-conducting ring 31. The heat dissipation dorsal fins 33 on the heat-conducting ring 31 increase the heat dissipation area and dissipate heat naturally through air convection. The micro water pump 51 starts and drives the coolant to flow from the arc-shaped connecting pipe 52 into the docking pipe 53, and then into the transverse connecting pipe 42 of the water-cooling component 4. The coolant is distributed to each arc-shaped copper pipe 41, absorbs the heat transferred by the heat-conducting ring 31, and then flows back to the transverse connecting pipe 42. Finally, it returns to the micro water pump 51 through the docking pipe 53 and the arc-shaped connecting pipe 52 on the other side, forming a closed loop circulation.

[0037] This utility model is a heat dissipation structure for a permanent magnet motor, which has the characteristics of good heat dissipation effect. Through the synergistic effect of passive heat dissipation, water cooling circulation and air cooling auxiliary triple heat dissipation mechanism, the heat dissipation efficiency of permanent magnet motor is significantly improved, the motor life is extended and the safety performance is optimized.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heat dissipation structure for a permanent magnet motor, characterized in that, include: Passive heat dissipation assembly (3) attached to the surface of permanent magnet motor (1); A water-cooling assembly (4) surrounds the passive heat dissipation assembly (3); The circulation section (5) includes a micro water pump (51) and an arc-shaped connecting pipe (52) connecting the micro water pump (51), the arc-shaped connecting pipe (52) being connected to the water cooling assembly (4); The air-cooled component (6) cools the arc-shaped connecting pipe (52).

2. The heat dissipation structure of the permanent magnet motor according to claim 1, characterized in that, The passive heat dissipation component (3) includes a heat-conducting ring (31), which includes a first heat-conducting half-ring (311) and a second heat-conducting half-ring (312). The first heat-conducting half-ring (311) and the second heat-conducting half-ring (312) are closely attached to the outer surface of the permanent magnet motor (1).

3. The heat dissipation structure of the permanent magnet motor according to claim 2, characterized in that, The surface of the heat-conducting ring (31) is provided with outwardly protruding heat dissipation dorsal fins (33).

4. The heat dissipation structure of the permanent magnet motor according to claim 3, characterized in that, A first receiving gap (34) is formed between adjacent heat dissipation dorsal fins (33), and the water cooling assembly (4) includes an arc-shaped copper tube (41), which is embedded in the first receiving gap (34).

5. The heat dissipation structure of the permanent magnet motor according to claim 4, characterized in that, The passive heat dissipation component (3) includes a connecting component (32), which includes a mating plate (321) disposed on the end faces of the first heat-conducting semi-ring (311) and the second heat-conducting semi-ring (312), a connecting plate (322) fixedly connected to the mating plate (321), and a fixing bolt (323). The connecting plate (322) is fixedly connected to the mating plate (321) fixed on the end faces of the first heat-conducting semi-ring (311) and the second heat-conducting semi-ring (312), respectively, and the fixing bolt (323) penetrates the connecting plate (322).

6. The heat dissipation structure of the permanent magnet motor according to claim 5, characterized in that, The heat dissipation dorsal fin (33) forms a second receiving gap (35) between its two ends and the docking plate (321). The water cooling assembly (4) includes a transverse connecting pipe (42), which is located in the second receiving gap (35) and communicates with both ends of the arc-shaped copper pipe (41).

7. The heat dissipation structure of the permanent magnet motor according to claim 6, characterized in that, The circulation section (5) includes a docking tube (53) which is connected to the transverse connecting tube (42), and a sealing gasket (54) is provided at the connection.

8. The heat dissipation structure of the permanent magnet motor according to claim 1, characterized in that, The air-cooled assembly (6) includes a mounting ring (61) and a fan blade (62) driven by the permanent magnet motor (1). The fan blade (62) is fixed to the surface of the mounting ring (61) and rotates to generate airflow.

9. The heat dissipation structure of the permanent magnet motor according to claim 2, characterized in that, The inner wall of the heat-conducting ring (31) is coated with an insulating coating.

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