Permanent magnet motor with reduced temperature of permanent magnets

Abstract

The application relates to a permanent magnet motor with reduced permanent magnet temperature, belonging to the technical field of permanent magnet motors, wherein a motor shell is provided with a stator core fixed in the motor shell, a rotating shaft is arranged in the stator core, a permanent magnet block is fixed on the rotating shaft, the permanent magnet block is fixed on the rotating shaft through a locking plate, a horizontal air inlet hole is arranged on the locking plate, a vertical air duct is arranged on the locking plate, and the horizontal air inlet hole and the vertical air duct are communicated. The application has the effect of accelerating the heat dissipation of the permanent magnet.

Description

Technical Field

[0001] This application relates to the field of permanent magnet motor technology, and in particular to a permanent magnet motor that reduces the temperature of the permanent magnet. Background Technology

[0002] Permanent magnet motors are common motors in our lives. With their core advantages of "high efficiency and high density", permanent magnet motors have become the mainstream development direction of the motor industry. As the permanent magnet of a permanent magnet motor, such as "neodymium iron boron", increases in temperature during the motor's operation, the magnetism of the permanent magnet weakens, resulting in a decrease in the motor's output torque and a reduction in motor performance. Therefore, permanent magnets are needed for heat dissipation. Currently, most permanent magnets in motors have a stacked structure, and airflow can only pass through the surface of the permanent magnet, resulting in slow heat dissipation. Summary of the Invention

[0003] The purpose of this application is to provide a permanent magnet motor that reduces the temperature of the permanent magnet, in order to solve the technical problem that "most existing motor permanent magnets are stacked structures, and airflow can only pass through the surface of the permanent magnet, resulting in incomplete heat dissipation".

[0004] The permanent magnet motor for reducing the temperature of permanent magnets provided in this application adopts the following technical solution: A permanent magnet motor for reducing the temperature of permanent magnets includes a motor housing, a stator core is fixed inside the motor housing, a rotating shaft is provided inside the stator core, a permanent magnet block is fixed on the rotating shaft, the permanent magnet block is fixed on the rotating shaft by a locking plate, a horizontal air inlet hole is provided on the locking plate, a vertical air duct is provided on the locking plate, and the horizontal air inlet hole is connected to the vertical air duct.

[0005] Optionally, the stator core is provided with a horizontal heat dissipation channel, the stator core is provided with a vertical heat dissipation channel, and an excitation coil is sleeved on the stator core.

[0006] Optionally, a fan blade is fixed to the rotating shaft, and the air generated by the fan blade passes through the air inlet and the horizontal heat dissipation duct.

[0007] Optionally, end caps are provided at both ends of the motor housing, and air inlets are provided on the end caps. The end caps are rotatably connected to the rotating shaft.

[0008] Optionally, the locking plate is provided with locking grooves on both sides, which are used to engage permanent magnet blocks.

[0009] Optionally, a clamping ring is threaded onto the rotating shaft, the clamping ring being used to clamp the locking plate.

[0010] Optionally, a first limiting groove is provided on the rotating shaft, a second limiting groove is provided on the locking plate, and a locking bolt is provided between the first limiting groove and the second limiting groove.

[0011] In summary, this application includes at least one of the following beneficial technical effects: 1. During the operation of the motor, the air generated by the fan blades passes through the air inlet and the horizontal cooling duct. The air can enter the vertical duct from the air inlet, then enter the horizontal cooling duct from the vertical duct, and finally be discharged from the horizontal cooling duct. This can dissipate the heat on the permanent magnet in a timely manner, thereby improving the heat dissipation speed and slowing down the temperature rise of the permanent magnet, effectively preventing the permanent magnet temperature from being too high and causing a decrease in motor performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the mounting structure of the rotating shaft and locking plate according to an embodiment of this application; Figure 3 This is a schematic diagram of the locking plate structure according to an embodiment of this application; In the diagram, 1. Motor housing; 2. Stator core; 21. Horizontal heat dissipation duct; 22. Vertical heat dissipation duct; 23. Excitation coil; 3. Shaft; 31. Pressure ring; 32. First limiting groove; 33. Second limiting groove; 4. Permanent magnet block; 5. Locking plate; 51. Air inlet; 52. Vertical air duct; 53. Clamping groove; 6. Fan blade; 7. End cover; 71. Air inlet. Detailed Implementation

[0013] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below.

[0014] Reference Figure 1 A permanent magnet motor for reducing the temperature of permanent magnets includes a motor housing 1, a stator core 2 fixed inside the motor housing 1, a rotating shaft 3 inside the stator core 2, a permanent magnet block 4 fixed on the rotating shaft 3, the permanent magnet block 4 being fixed on the rotating shaft 3 by a locking plate 5, the locking plate 5 having a horizontal air inlet 51 and a vertical air duct 52, the horizontal air inlet 51 being connected to the vertical air duct 52; The stator core 2 is equipped with a horizontal heat dissipation duct 21 and a vertical heat dissipation duct 22. An excitation coil 23 is fitted onto the stator core 2. A fan blade 6 is fixed on the rotating shaft 3. The air generated by the fan blade 6 passes through the air inlet 51 and the horizontal heat dissipation duct 21. During motor operation, the air generated by the fan blade 6 passes through the air inlet 51 and the horizontal heat dissipation duct 21. The air can enter the vertical duct 22 from the air inlet 51, then enter the horizontal heat dissipation duct 21 from the vertical heat dissipation duct 22, and finally be discharged from the horizontal heat dissipation duct 21. This can dissipate the heat on the permanent magnet 4 in a timely manner, thereby improving the heat dissipation speed and slowing down the temperature rise of the permanent magnet 4, effectively preventing the permanent magnet 4 from overheating and causing a decrease in motor performance.

[0015] Reference Figure 1 End caps 7 are provided at both ends of the motor housing 1. Air inlets 71 are provided on the end caps 7. During the rotation of the fan blades 6, air can enter through the air inlets 71. The end caps 7 are rotatably connected to the rotating shaft 3, generating a stable supporting force on the rotating shaft 3, so that the motor can work smoothly.

[0016] Reference Figure 1 , Figure 2 The locking plate 5 has clamping grooves 53 on both sides. The clamping grooves 53 are used to clamp the permanent magnet block 4. The locking plate 5 is set on both sides of the permanent magnet block 4 to generate clamping force on the permanent magnet block 4. At the same time, the permanent magnet block 4 is clamped in the clamping grooves 53, so that the permanent magnet block 4 is fixed more firmly.

[0017] Reference Figure 1 , Figure 2 A clamping ring 31 is threaded on the rotating shaft 3. The clamping ring 31 is used to clamp the locking plate 5. The clamping ring 31 brings the locking plates 5 closer together and generates a clamping force on the permanent magnet block 4.

[0018] Reference Figure 2 , Figure 3 The rotating shaft 3 has a first limiting groove 32 and the locking plate 5 has a second limiting groove 33. A locking bolt is provided between the first limiting groove 32 and the second limiting groove 33. By cooperating with the locking bolt and the first limiting groove 32 and the second limiting groove 33, the relative rotation between the locking plate 5 and the rotating shaft 3 can be effectively prevented.

[0019] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A permanent magnet motor for reducing the temperature of permanent magnets, characterized in that: The device includes a motor housing (1), a stator core (2) fixed inside the motor housing (1), a rotating shaft (3) inside the stator core (2), a permanent magnet block (4) fixed on the rotating shaft (3), the permanent magnet block (4) being fixed on the rotating shaft (3) by a locking plate (5), a horizontal air inlet hole (51) and a vertical air duct (52) on the locking plate (5), the horizontal air inlet hole (51) and the vertical air duct (52) being connected; the stator core (2) is provided with a horizontal heat dissipation air duct (21) and a vertical heat dissipation air duct (22), and a fan blade (6) is fixed on the rotating shaft (3); the air generated by the fan blade (6) passes through the air inlet hole (51) and the horizontal heat dissipation air duct (21).

2. A permanent magnet motor for reducing the temperature of permanent magnets according to claim 1, characterized in that, An excitation coil (23) is fitted onto the stator core (2).

3. A permanent magnet motor for reducing the temperature of permanent magnets according to claim 2, characterized in that, End caps (7) are provided at both ends of the motor housing (1), and air inlets (71) are provided on the end caps (7). The end caps (7) are rotatably connected to the rotating shaft (3).

4. A permanent magnet motor for reducing the temperature of permanent magnets according to claim 1, characterized in that, The locking plate (5) has locking grooves (53) on both sides, which are used to engage permanent magnet blocks (4).

5. A permanent magnet motor for reducing the temperature of permanent magnets according to claim 4, characterized in that, A clamping ring (31) is threaded onto the rotating shaft (3), and the clamping ring (31) is used to clamp the locking plate (5).

6. A permanent magnet motor for reducing the temperature of permanent magnets according to claim 4, characterized in that, The rotating shaft (3) is provided with a first limiting groove (32), and the locking plate (5) is provided with a second limiting groove (33). A locking bolt is provided between the first limiting groove (32) and the second limiting groove (33).

Images