Axial flux permanent magnet motor with composite water cooling structure

Abstract

This invention discloses an axial flux permanent magnet motor with a composite water-cooling structure. In this motor, stator frames are located at both ends of the rotating shaft, the stator core is mounted on the stator frames, the stator windings are located within the stator frames, and water channels are provided within the stator frames. End caps are located on both sides of the outer casing, with the inner side of the end caps abutting against the stator core. Cooling channels are provided on the end caps, and the water channels within the stator frames are connected to the cooling channels. This invention establishes a stator frame-end cap composite water-cooling structure. Water channels are provided within the stator frames and end caps on both sides. The stator frames directly contact the stator windings, efficiently transferring heat generated at the armature windings. The end caps directly contact the stator core, transferring heat generated by the stator core. This constructs an efficient heat conduction path from the high-heat-load stator winding coils to the high-heat-dissipation-capacity stator frame-end cap composite water-cooling structure, transferring a large amount of heat generated by the armature windings and stator core to the outside of the motor, effectively cooling the stator assembly.

Description

Technical Field

[0001] This invention relates to the field of axial flux permanent magnet motor technology, and particularly to an axial flux permanent magnet motor with a composite water-cooling structure. Background Technology

[0002] Compared to radial motors, axial flux permanent magnet motors are more compact in axial structure and have higher power and torque densities. In some applications with limited space, axial flux permanent magnet motors are more reasonable and effective.

[0003] Existing motor cooling methods mainly include air cooling and liquid cooling. Liquid cooling mainly includes water cooling and oil cooling, and the cooling effect of liquid cooling is significantly better than that of air cooling. However, in current technology, liquid cooling is limited to setting cooling pipes on the motor casing, and the heat inside the motor is difficult to remove, making it difficult to produce a good cooling effect and hindering the development of high power density motors.

[0004] Therefore, existing technologies still need to be improved and enhanced. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an axial flux permanent magnet motor with a composite water-cooling structure, which aims to solve the problem of poor internal cooling effect of existing axial flux permanent magnet motors.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An axial flux permanent magnet motor with a composite water-cooling structure includes a housing and a rotating shaft. A rotor disk is located in the middle of the rotating shaft, stator windings are located on both sides of the rotor disk, and a stator core is located outside the stator windings. The housing covers the rotor disk, and stator frames are located at both axial ends of the rotating shaft. The stator core is located on the stator frames, the stator windings are located inside the stator frames, and water channels are provided inside the stator frames. End caps are located on both sides of the housing, the inner side of the end caps abuts against the stator core, and cooling channels are provided on the end caps. The water channels inside the stator frames are connected to the cooling channels.

[0007] Furthermore, the cooling channel is a spiral water channel, coiled inside the end cover.

[0008] Furthermore, the stator frame consists of a shaft frame and multiple supports. The supports are L-shaped, with their short sides connected to the shaft frame. The multiple supports are circumferentially spaced on the outer circumferential surface of the shaft frame. Both the shaft frame and the supports have internal water channels for the stator frame, which are interconnected. Stator windings are located between each pair of the multiple supports.

[0009] Furthermore, the shaft support is equipped with a water inlet and a stator support water outlet.

[0010] Furthermore, a slot is provided in the middle of the end cover, and the stator frame is snapped into the slot to form a sealed connection.

[0011] Furthermore, the shaft bracket is also equipped with a water channel connection port, through which the water channel inside the stator bracket is connected to the cooling channel on the end cover.

[0012] Furthermore, the end cap is equipped with an end cap outlet.

[0013] The technical solution adopted in this invention has the following beneficial effects: Compared with existing technologies, this invention establishes a stator frame-end cover composite water-cooling structure. Water channels are incorporated within the stator frame and end covers on both sides. The stator frame directly contacts the stator windings, efficiently transferring heat generated at the armature windings. The end covers directly contact the stator core, transferring heat generated by the stator core. This constructs an efficient heat conduction path from the high-heat-load stator winding coils to the high-heat-dissipation-capacity stator frame-end cover composite water-cooling structure, transferring a large amount of heat generated by the armature windings and stator core to the outside of the motor, effectively cooling the stator assembly. Compared with traditional liquid cooling indirect heat transfer methods, the stator frame-end cover composite water-cooling structure, through direct contact with the armature windings, improves the motor's heat dissipation capacity and increases its service life. Attached Figure Description

[0014] Figure 1 This is a 3D diagram of the external structure of the motor; Figure 2 This is a schematic diagram of the motor stator assembly module; Figure 3 This is a cross-sectional view of the motor. Figure 4 This is a schematic diagram of the motor stator frame structure; Figure 5 This is a schematic diagram of the internal water channels of the motor stator frame; Figure 6 This is a schematic diagram of the motor end cover structure; Figure 7 This is a schematic diagram of the water channels inside the motor end cover; Figure 8 Schematic diagram of the composite water channel of motor stator frame-end cover; Explanation of reference numerals in the attached drawings: 1. Outer casing, 2. End cover, 3. Stator winding, 4. Stator core, 5. Shaft, 6. Rotor disc, 7. Stator frame, 8. Spiral water channel inside the end cover, 9. Water channel inside the stator frame, 12. Water inlet, 13. Water outlet of the stator frame, 14. Water outlet of the end cover, 15. Water channel connection port, 16. Shaft bracket, 17. Support bracket, 18. Slot. Detailed Implementation

[0015] The present invention will now be further described with reference to the accompanying drawings.

[0016] An axial flux permanent magnet motor with a composite water-cooling structure, such as Figure 1-8As shown, the axial flux permanent magnet motor includes a housing 1 and a rotating shaft 5. A rotor disk 6 is provided in the middle of the rotating shaft 5, and stator windings 3 are provided on both sides of the rotor disk 6. A stator core 4 is provided outside the stator windings 3. The housing 1 covers the rotor disk 6. Stator frames 7 are provided at both ends of the rotating shaft 5. The stator core 4 is provided on the stator frame 7. The stator windings 3 are provided inside the stator frame 7. The stator frame 7 has internal water channels 9. End caps 2 are provided on both sides of the housing 1. The inner side of the end caps 2 abuts against the stator core 4. Cooling channels 8 are provided on the end caps 2. The internal water channels 9 of the stator frame are connected to the cooling channels 8.

[0017] like Figure 1-4 As shown, taking the motor side as an example, the stator frame 7 has a stator frame internal water channel 9 inside. The stator frame 7 is composed of a shaft frame 16 and multiple supports 17. The supports 17 are L-shaped, and the short side of the supports 17 is connected to the shaft frame 16. Multiple supports 17 are arranged circumferentially on the outer circumferential surface of the shaft frame 16. Both the shaft frame 16 and the supports 17 have stator frame internal water channels 9 inside and are interconnected. Stator windings 3 are provided between each pair of multiple supports 17. The supports 17 on the side of the stator frame 7 are placed between the double-layer stator windings in each stator slot, directly contacting the windings and efficiently transferring the heat generated by the windings. The shaft frame 16 of the stator frame 7 is fixed to the rotating shaft 5 by bearings. The end cover 2 is equipped with a cooling channel 8, which is a spiral water channel coiled inside the end cover 2. The cooling channel inside the end cover efficiently transfers the heat generated by the stator core 4 through direct contact with the stator core 4.

[0018] Combination Figure 1 , Figure 2 , Figure 3 and Figure 6 The end cover 2 has a slot 18 in the middle, and the stator frame 7 is snapped into the slot 18 to form a sealed connection. The shaft frame 16 also has a water channel connection port 15. The water channel 9 inside the stator frame is connected to the cooling channel 8 on the end cover 2 through the water channel connection port 15. The stator frame 7 and the end cover 2 are tightly fitted, and the two parts of the built-in water channel are connected through the water channel connection port 15. The composite water cooling structure transfers heat to the outside of the machine casing, keeping the stator core winding of the motor in a relatively low temperature environment, thus improving the service life of the motor.

[0019] Figure 4 and Figure 5 The diagrams show the stator frame structure and internal water channel. The shaft bracket 16 has a water inlet 12 and a stator frame water outlet 13, while the end cover 2 has an end cover water outlet 14. Cooling water enters through the stator frame water inlet 12, flows through the water channel 9 inside the stator frame, and exits through the stator frame water outlet 13. This water channel is the first water-cooling channel in the composite water-cooling structure. The first water-cooling channel, through direct contact with the armature winding, efficiently transfers the heat generated by the winding, thereby cooling the winding.

[0020] Figure 6 and Figure 7 The diagrams show the end cover structure and the internal spiral water channel. Cooling water enters through the stator frame inlet 12, with part flowing into the first water-cooling channel and the other part flowing through the water channel connector 15 into the internal cooling channel 8 of the end cover 2, and then flowing out from the end cover outlet 14. This water channel is the second water-cooling channel of the composite water-cooling structure. The second water-cooling channel, through direct contact with the stator core 4, efficiently transfers the heat generated by the stator core 4, thereby achieving cooling of the stator section.

[0021] Figure 8 This is a schematic diagram of the stator frame-end cover composite water channel. Cooling water enters through the inlet 12, with part flowing into the first water-cooling channel inside the stator frame and the other part flowing into the second water-cooling channel inside the end cover through the water channel connection port 15. The composite water-cooling structure has a wider heat dissipation range and higher heat dissipation efficiency.

[0022] The stator frame-end cover composite water-cooling structure effectively improves the heat dissipation capacity of the stator windings and stator core, greatly enhancing the motor's cooling efficiency.

Claims

1. An axial flux permanent magnet motor with a composite water-cooled structure, the axial flux permanent magnet motor comprising a housing (1) and a rotating shaft (5), a rotor disk (6) disposed in the middle of the rotating shaft (5), stator windings (3) disposed on both sides of the rotor disk (6), a stator core (4) disposed outside the stator windings (3), and the housing (1) covering the rotor disk (6), characterized in that, The shaft (5) has stator frames (7) at both ends of its axial direction. The stator core (4) is located on the stator frame (7). The stator winding (3) is located inside the stator frame (7). The stator frame (7) has water channels (9) inside the stator frame. The outer shell (1) has end caps (2) on both sides. The inner side of the end caps (2) abuts against the stator core (4). The end caps (2) have cooling channels (8) on them. The water channels (9) inside the stator frame are connected to the cooling channels (8).

2. The axial flux permanent magnet motor with a composite water-cooling structure according to claim 1, characterized in that, The cooling channel (8) is a spiral water channel, which is coiled inside the end cover (2).

3. The axial flux permanent magnet motor with a composite water-cooling structure according to claim 1, characterized in that, The stator frame (7) consists of a shaft frame (16) and multiple supports (17). The supports (17) are L-shaped, and the short side of the supports (17) is connected to the shaft frame (16). Multiple supports (17) are arranged circumferentially on the outer circumferential surface of the shaft frame (16). The shaft frame (16) and the supports (17) are provided with stator frame internal water channels (9) and are interconnected. Stator windings (3) are provided between each pair of supports (17).

4. The axial flux permanent magnet motor with a composite water-cooling structure according to claim 3, characterized in that, The shaft bracket (16) is provided with a water inlet (12) and a stator bracket water outlet (13).

5. The axial flux permanent magnet motor with a composite water-cooling structure according to claim 4, characterized in that, The end cap (2) has a slot (18) in the middle, and the stator frame (7) is snapped into the slot (18) to form a sealed connection.

6. The axial flux permanent magnet motor with a composite water-cooling structure according to claim 5, characterized in that, The shaft bracket (16) is also provided with a water channel connection port (15), and the water channel (9) inside the stator frame is connected to the cooling channel (8) on the end cover (2) through the water channel connection port (15).

7. The axial flux permanent magnet motor with a composite water-cooling structure according to claim 1, characterized in that, The end cap (2) is provided with an end cap outlet (14).

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