Permanent magnet frequency conversion high-voltage synchronous motor

Abstract

The invention provides a permanent-magnet variable-frequency high-voltage synchronous motor, which comprises a shell, and is characterized in that a motor is mounted in the shell through a heat dissipation groove, and the heat dissipation groove is used for dissipating heat of the motor; a cushion block is mounted at the bottom of the shell; a plurality of cooling fins are installed outside the motor, the cooling fins are installed on the inner side wall of the cooling groove, and the cooling fins are arranged outside the motor at equal intervals. According to the equipment, the rotating shaft of the motor rotates to drive the equipment, the gap between the pressing plate and the rubber bag is an allowable play distance, and when the axial play distance of the rotating shaft of the motor is larger than the gap, the pressing plate moves along with the rotating shaft to extrude the rubber bag, so that hydraulic oil in the rubber bag is extruded into the hollow pipe; and the hydraulic oil pushes the piston block to move along the interior of the hollow pipe until the control switch is extruded to start the alarm to give an alarm, so that an overlarge displacement distance of the rotating shaft is reminded in time, an operator is convenient to overhaul in time, and motor damage caused by overlong displacement time is prevented.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a permanent magnet variable frequency high voltage synchronous motor. Background Technology

[0002] A synchronous motor is an AC motor in which the rotor speed is strictly synchronized with the rotational magnetic field speed of the stator. During operation, the rotating shaft of a synchronous motor may experience axial movement. If this movement goes undetected, the resulting axial force will directly act on the bearings. If this force exceeds the bearing's axial load capacity, it will cause wear on the bearing raceways, breakage of the rolling elements, and deformation of the cage, ultimately leading to bearing jamming or burnout. If the movement is excessive, the rotor core and shaft will also rub against the stator end windings and end covers, causing damage to the stator winding insulation and wear on the rotor core, potentially leading to a short circuit. Simultaneously, the oil seals and gaskets at the motor shaft end will age and crack due to the axial friction. This can lead to lubricating oil leaks or the intrusion of external dust and moisture. If the motor is connected to the load via a coupling, axial movement can cause uneven stress on the coupling bolts and fatigue fracture of the elastic elements, affecting power transmission. The longer the service life, the greater the probability of motor problems. Furthermore, when the motor shaft rotates, it is generally cooled by installed fan blades. The fan blades drive airflow, carrying away the heat from the motor's heat sink, thus cooling the motor. However, when the motor is running at full power, the cooling capacity of a single fan blade is insufficient to meet the motor's cooling needs. As a result, if the temperature becomes too high, the machine needs to be stopped for cooling, leading to a decrease in the efficiency of the motor-driven equipment. Therefore, a device is needed to solve the above problems. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the existing technology. The present invention proposes a permanent magnet variable frequency high voltage synchronous motor.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A permanent magnet variable frequency high-voltage synchronous motor includes: a housing, in which a motor is mounted via heat dissipation slots for cooling the motor; a pad is mounted at the bottom of the housing; several heat sinks are mounted on the outside of the motor, the heat sinks being installed on the inner sidewalls of the heat dissipation slots and equidistantly arranged on the outside of the motor; a junction box for motor wiring is mounted on the housing; a heat dissipation unit for active cooling of the motor is mounted on the housing; a detection unit for detecting the position of the motor shaft is mounted on the housing; the detection unit includes a circular hollow block mounted on the housing, through which the motor shaft movably passes; and a ring filled with hydraulic oil is mounted inside the hollow block on the side away from the motor. The device includes a hollow block with a hollow tube mounted on it. A pressure plate for squeezing the rubber bladder is installed outside the motor shaft. A gap exists between the pressure plate and the rubber bladder. A hollow tube with an open top is mounted on the hollow block. A piston block is slidably mounted inside the hollow tube and slides along the inside of the tube. A through-hole connecting the hollow tube and the rubber bladder is provided on the hollow block. A control switch is installed at the top of the hollow tube. The device also includes an alarm mounted on the outer casing. When the motor shaft rotates axially, the pressure plate squeezes the rubber bladder, causing hydraulic oil inside the bladder to be forced into the hollow tube. The hydraulic oil pushes the piston block to move along the inside of the hollow tube until it squeezes the control switch, activating the alarm.

[0005] Preferably, the alarm is a buzzer, and the alarm is electrically connected to a control switch, which is used to activate the alarm.

[0006] Preferably, the junction box includes a housing mounted on a shell; a cover is installed on the housing for opening the housing; a conduit for threading wires is installed on the housing; a rubber pad is placed on the conduit away from the housing; three circular holes are formed on the rubber pad for passing power wires through, the inner diameter of the circular holes being smaller than the outer diameter of the power wires; and a pressure cap for squeezing and fixing the rubber pad is installed on the conduit away from the housing.

[0007] Preferably, the heat dissipation unit includes a first cylindrical body mounted on the outer casing; a dustproof component to prevent dust from entering the gaps between the heat dissipation fins is installed on the side of the outer casing away from the first cylindrical body; a second cylindrical body is interference-fitted onto the side of the first cylindrical body away from the motor; a first dustproof mesh is installed on the second cylindrical body; a first movable shaft is rotatably mounted on the side of the second cylindrical body near the motor; a first fan blade is installed outside the first movable shaft; a first bracket is installed inside the first cylindrical body, and a transmission component for driving the first movable shaft to rotate is installed on the first bracket, the transmission component being used to transmit motor power to the position of the first movable shaft.

[0008] Preferably, the transmission assembly includes a first pipe mounted on a first bracket, the first pipe being filled with coolant; a second bracket installed inside the first pipe; a second movable shaft rotatably mounted on the second bracket, the second movable shaft rotating around its own central axis; a first external magnetic rotor mounted on the motor shaft; internal magnetic rotors mounted on both sides of the second movable shaft; and a second external magnetic rotor mounted on the side of the first movable shaft near the first pipe. When the motor shaft rotates, it drives the first external magnetic rotor to rotate, which in turn drives the adjacent internal magnetic rotor to rotate, thus driving the second movable shaft to rotate. The internal magnetic rotors near the second external magnetic rotor rotate synchronously, and then the second external magnetic rotor is driven to rotate by magnetic force, thereby driving the first movable shaft to rotate, causing the first fan blades to rotate, driving airflow, and allowing the air to pass through the heat dissipation slots to cool the motor.

[0009] Preferably, a second pipe is installed outside the first pipe; a third pipe is also installed outside the first pipe; and a second fan blade is also installed outside the second movable shaft, the second fan blade being located between the second pipe and the third pipe; when the second movable shaft rotates, it drives the second fan blade to rotate, driving the coolant inside the first pipe to flow, causing the coolant inside the second pipe to be drawn into the first pipe, the coolant inside the first pipe to be injected into the third pipe, and then the coolant inside the third pipe to be injected into the second pipe, and so on, so that the coolant flows inside the first pipe, the second pipe and the third pipe, assisting the motor in cooling down.

[0010] Preferably, the second pipe is arranged equidistantly around the outside of the first pipe, and then passes through the gap of the heat sink inside the heat sink groove, and is in close contact with the heat sink.

[0011] Preferably, the third pipe is arranged equidistantly around the outside of the first pipe, and then passes through the gap of the heat sink inside the heat sink groove, and is in close contact with the heat sink.

[0012] Preferably, the second and third pipes, located in the same gap between the heat sinks, are connected to each other on the side away from the first pipe, and the second and third pipes are filled with coolant.

[0013] Preferably, the dustproof component includes a third cylindrical body mounted on the outer casing, the third cylindrical body being an annular cylindrical body and fitted over the outside of the heat dissipation groove; it also includes a sleeve block that is interference-fitted onto the third cylindrical body; a second dustproof net is installed on the sleeve block, through which air entering the heat dissipation groove is filtered.

[0014] Compared with the prior art, the beneficial effects of the present invention include: 1. The motor shaft rotates to drive the equipment. The gap between the pressure plate and the rubber bladder is the allowable axial movement distance. When the axial movement distance of the motor shaft exceeds the gap, the pressure plate moves with the shaft to squeeze the rubber bladder, causing the hydraulic oil inside the rubber bladder to be squeezed into the hollow tube. The hydraulic oil pushes the piston block to move along the inside of the hollow tube until the squeeze control switch is activated and the alarm is triggered. This timely reminder that the shaft movement distance is too large allows operators to perform timely maintenance and prevents motor damage caused by prolonged axial movement.

[0015] 2. When the motor shaft rotates, it drives the first outer magnetic rotor to rotate. The first outer magnetic rotor drives the nearby inner magnetic rotor to rotate, thus driving the second movable shaft to rotate. The inner magnetic rotor near the second outer magnetic rotor rotates synchronously. Then, through magnetic force, it drives the second outer magnetic rotor to rotate, thereby driving the first movable shaft to rotate, causing the first fan blade to rotate, driving airflow, and allowing the air to pass through the heat dissipation slot to cool the motor.

[0016] 3. When the second movable shaft rotates, it drives the second fan blade to rotate, which in turn drives the coolant inside the first pipe to flow. This causes the coolant inside the second pipe to be drawn into the first pipe, and then the coolant inside the first pipe to be injected into the third pipe. After that, the coolant inside the third pipe is injected into the second pipe, and so on. This cycle allows the coolant to flow inside the first, second, and third pipes, thus assisting the motor in cooling down. Attached Figure Description

[0017] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the structure of a permanent magnet variable frequency high voltage synchronous motor proposed in this invention; Figure 2 This is a first cross-sectional view of a permanent magnet variable frequency high voltage synchronous motor proposed in this invention; Figure 3 This is a second cross-sectional view of a permanent magnet variable frequency high voltage synchronous motor proposed in this invention; Figure 4 This is a third cross-sectional view of a permanent magnet variable frequency high voltage synchronous motor proposed in this invention; Figure 5 Appendix to this invention Figure 1 Enlarged view of point A in the middle; Figure 6 Appendix to this invention Figure 2 Enlarged view of point B in the middle; Figure 7 Appendix to this invention Figure 3 Enlarged view of point C in the middle; Figure 8 Appendix to this invention Figure 3 Enlarged view of point D; Figure 9 Appendix to this invention Figure 3 Enlarged view of point E in the middle; Figure 10 Appendix to this invention Figure 4 Enlarged diagram at point F; Numbered in the diagram: 1. Outer shell; 2. Junction box; 21. Box body; 22. Rubber pad; 23. Round hole; 24. Cover; 25. Conduit; 3. Pad; 4. Detection section; 41. Hollow block; 42. Pressure plate; 43. Hollow tube; 44. Rubber bladder; 45. Perforation; 46. Piston block; 47. Control switch; 48. Alarm; 5. Motor; 6. Heat dissipation section; 61. Dustproof assembly; 611. Sleeve block; 612. Third cylinder; 613. Second dustproof 62. First cylinder; 63. Transmission assembly; 631. First outer magnetic rotor; 632. Inner magnetic rotor; 633. Second movable shaft; 634. Second fan blade; 635. First pipe; 636. Second outer magnetic rotor; 637. Second bracket; 64. First dustproof net; 65. Second pipe; 66. First fan blade; 67. Third pipe; 68. First movable shaft; 69. First bracket; 610. Second cylinder; 7. Heat dissipation groove; 8. Heat dissipation fin. Detailed Implementation

[0018] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0019] According to one embodiment of the present invention, Figures 1-10 As shown.

[0020] A permanent magnet variable frequency high voltage synchronous motor has the following specific structure: The housing 1 houses a motor 5, which is mounted inside through a heat dissipation groove 7. The housing 1 protects the motor 5, and the heat dissipation groove 7 dissipates heat from the motor 5. A pad 3 is welded and fixed to the bottom of the housing 1. Several heat sinks 8 are welded and fixed to the outside of the motor 5, with the heat sinks 8 welded and fixed to the inner wall of the heat dissipation groove 7 and evenly spaced outside the motor 5. A junction box 2 for wiring the motor 5 is installed on the housing 1. A heat dissipation unit 6 for actively cooling the motor 5 is installed on the housing 1. A detection unit 4 for detecting the position of the motor 5 shaft is installed on the housing 1. The detection unit 4 includes a circular hollow block 41 welded and fixed to the housing 1, through which the motor 5 shaft moves. An annular rubber bladder 44 filled with hydraulic oil is bonded and fixed inside the hollow block 41 on the side away from the motor 5. A pressure plate 42 for squeezing the rubber bladder 44 is welded and fixed to the outside of the motor 5 shaft. There is a gap between the pressure plate 42 and the rubber bladder 44. A hollow tube 43 is welded and fixed to a hollow block 41, with an open top. A piston block 46 is slidably installed inside the hollow tube 43, sliding along the interior of the hollow tube 43. A through hole 45 is provided on the hollow block 41, connecting the hollow tube 43 and the rubber bladder 44. A control switch 47 is embedded and fixed to the top of the hollow tube 43. An alarm 48, which is a buzzer, is also included and is electrically connected to the control switch 47, which is used to activate the alarm 48. When the shaft of the motor 5 rotates axially, the pressure plate 42 squeezes the rubber bladder 44, forcing the hydraulic oil inside the rubber bladder 44 into the hollow tube 43. The hydraulic oil pushes the piston block 46 to move along the interior of the hollow tube 43 until the control switch 47 is pressed, activating the alarm 48.

[0021] In this embodiment, the junction box 2 includes a box body 21 fixed to the outer casing 1 by bolts; a box cover is bolted to one side of the box body 21, and the box cover is used to open the box body 21; a conduit 25 for threading wires is embedded and fixed in the box body 21; a rubber pad 22 is placed on the side of the conduit 25 away from the box body 21; three round holes 23 are formed in the rubber pad 22, and the round holes 23 are used for passing power wires through, the inner diameter of the round holes 23 being smaller than the outer diameter of the power wires; and the conduit 25 is threaded on the side away from the box body 21. There is a pressure cap 24 for squeezing and fixing the rubber pad 22. In use, the neutral wire, live wire and ground wire of the power cord are passed through a round hole 23 in sequence, and then through the pressure cap 24. The pressure cap 24 is then rotated and fixed on the conduit 25. The rubber pad 22 is fixed on the conduit 25 by the pressure of the pressure cap 24. When the power cord passes through the round hole 23, the round hole 23 deforms and the inner side of the round hole 23 is tightly attached to the outside of the power cord to seal the contact position between the power cord and the round hole 23 and prevent water from entering the junction box 2.

[0022] In this embodiment, the heat dissipation unit 6 includes a first cylindrical body 62 fixed to the outer shell 1 by bolts; a dustproof component 61 is installed on the side of the outer shell 1 away from the first cylindrical body 62 to prevent dust from entering the gaps between the heat dissipation fins 8; a second cylindrical body 610 is interference-fitted to the side of the first cylindrical body 62 away from the motor 5; a first dustproof mesh 64 is embedded and fixed on the second cylindrical body 610; a first movable shaft 68 is rotatably installed on the side of the second cylindrical body 610 near the motor 5 via a bearing; a first fan blade 66 is installed outside the first movable shaft 68; a first bracket 69 is welded and fixed to the inner side of the first cylindrical body 62, and a transmission component 63 for driving the first movable shaft 68 to rotate is installed on the first bracket 69. The transmission component 63 is used to transmit the power of the motor 5 to the position of the first movable shaft 68.

[0023] In this embodiment, the transmission assembly 63 includes a first pipe 635 welded and fixed to a first bracket 69, the first pipe 635 being filled with coolant; a second bracket 637 welded and fixed inside the first pipe 635; a second movable shaft 633 rotatably mounted on the second bracket 637, the second movable shaft 633 rotating around its own central axis; a first outer magnetic rotor 631 welded and fixed to the shaft of the motor 5; inner magnetic rotors 632 welded and fixed to both sides of the second movable shaft 633; ​​and a second outer magnetic rotor 636 welded and fixed to the side of the first movable shaft 68 near the first pipe 635. When the shaft of the motor 5 rotates, it drives the first outer magnetic rotor 631 to rotate, and the first outer magnetic rotor 631 drives the nearby inner magnetic rotor 632 to rotate, thus driving the second movable shaft 633 to rotate. The inner magnetic rotor 632 near the second outer magnetic rotor 636 rotates synchronously, and then the second outer magnetic rotor 636 is driven to rotate by magnetic force, thereby driving the first movable shaft 68 to rotate, causing the first fan blade 66 to rotate, driving airflow, and allowing the air to dissipate heat from the motor 5 through the heat dissipation slot 7.

[0024] Specifically, a second pipe 65 is welded and fixed to the outside of the first pipe 635. The second pipe 65 is equidistantly arranged around the outside of the first pipe 635, and then passes through the gaps in the heat sink 8 inside the heat dissipation groove 7, and is tightly attached to the heat sink 8. It also includes a third pipe 67 welded and fixed to the outside of the first pipe 635. The third pipe 67 is equidistantly arranged around the outside of the first pipe 635, and then passes through the gaps in the heat sink 8 inside the heat dissipation groove 7, and is tightly attached to the heat sink 8. The second pipe 65 and the third pipe 67 are connected to each other on the side away from the first pipe 635 within the same gap between the heat sink 8, and the space inside the second pipe 65 and the third pipe 67 is filled with… It is filled with coolant; it also includes a second fan blade 634 welded and fixed to the outside of the second movable shaft 633, wherein the second fan blade 634 is located between the second pipe 65 and the third pipe 67; when the second movable shaft 633 rotates, it drives the second fan blade 634 to rotate, driving the coolant inside the first pipe 635 to flow, so that the coolant inside the second pipe 65 is drawn into the first pipe 635, the coolant inside the first pipe 635 is injected into the third pipe 67, and then the coolant inside the third pipe 67 is injected into the second pipe 65, and so on, so that the coolant flows in the first pipe 635, the second pipe 65 and the third pipe 67, assisting the motor 5 in cooling down.

[0025] In this embodiment, the dustproof component 61 includes a third cylindrical body 612 welded and fixed to the outer shell 1. The third cylindrical body 612 is an annular cylindrical body that fits around the heat dissipation groove 7. It also includes a sleeve block 611 that is interference-fitted onto the third cylindrical body 612. A second dustproof net 613 is embedded and fixed on the sleeve block 611 to filter the air entering the heat dissipation groove 7.

[0026] Working principle: When in use, move the outer casing 1 to the destination position and support it at the destination position by the pad 3. Then open the box 21, and then put the rubber pad 22 tightly against the conduit 25. Then pass the neutral wire, live wire and ground wire of the power cord through the cover 24. Then pass the neutral wire, live wire and ground wire through a round hole 23 in sequence. Then rotate and fix the cover 24 on the conduit 25. Use the cover 24 to squeeze and fix the rubber pad 22 on the conduit 25. Finally, fix the neutral wire, live wire and ground wire to the fixing point inside the box 21. When the power cord passes through the round hole 23, the round hole 23 deforms and the inner side of the round hole 23 is tightly against the outside of the power cord to seal the contact position between the power cord and the round hole 23 and prevent water from entering the junction box 2. When in use, the motor 5 is started, and the shaft of the motor 5 rotates to drive the equipment. The gap between the pressure plate 42 and the rubber bladder 44 is the allowable axial movement distance. When the axial movement distance of the shaft of the motor 5 is greater than the gap, the pressure plate 42 moves with the shaft to squeeze the rubber bladder 44, so that the hydraulic oil inside the rubber bladder 44 is squeezed into the hollow tube 43. The hydraulic oil pushes the piston block 46 to move along the inside of the hollow tube 43 until the squeeze control switch 47 is activated and the alarm 48 is triggered to sound an alarm. This timely reminder that the shaft axial movement distance is too large makes it convenient for operators to carry out timely maintenance and prevent damage to the motor 5 caused by excessive axial movement. When the shaft of motor 5 rotates, it drives the first outer magnetic rotor 631 to rotate. The first outer magnetic rotor 631 drives the adjacent inner magnetic rotor 632 to rotate, thus driving the second movable shaft 633 to rotate. The inner magnetic rotor 632, which is close to the second outer magnetic rotor 636, rotates synchronously. Then, the second outer magnetic rotor 636 is driven to rotate by magnetic force, thereby driving the first movable shaft 68 to rotate, causing the first fan blade 66 to rotate, driving airflow, and allowing air to pass through the heat dissipation slot 7 to dissipate heat from the motor 5. When the second movable shaft 633 rotates, it drives the second fan blade 634 to rotate, which in turn drives the coolant inside the first pipe 635 to flow, causing the coolant inside the second pipe 65 to be drawn into the first pipe 635. The coolant inside the first pipe 635 is then injected into the third pipe 67, and then the coolant inside the third pipe 67 is injected into the second pipe 65. This cycle continues, causing the coolant to flow inside the first pipe 635, the second pipe 65, and the third pipe 67, thus assisting the motor 5 in cooling down. Furthermore, when air flows through the interior of the heat dissipation slot 7, the air also cools the coolant inside the first pipe 635, the second pipe 65, and the third pipe 67.

[0027] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A permanent magnet variable frequency high-voltage synchronous motor, comprising: The housing includes a motor installed inside through heat dissipation slots for cooling the motor; a pad is installed at the bottom of the housing; several heat sinks are installed on the outside of the motor, the heat sinks are mounted on the inner sidewall of the heat dissipation slots, and the heat sinks are evenly spaced on the outside of the motor; a junction box for motor wiring is installed on the housing, characterized in that a heat dissipation part for active cooling of the motor is installed on the housing. The housing is equipped with a detection unit for detecting the position of the motor shaft; The detection unit includes a circular hollow block mounted on the housing, and the motor shaft movably passes through the hollow block; The hollow block has an annular rubber bladder filled with hydraulic oil installed on the side away from the motor. A pressure plate for squeezing the rubber bladder is installed on the outside of the motor shaft; There is a gap between the pressure plate and the rubber bladder; A hollow tube is installed on the hollow block, and the top of the hollow tube is open. A piston block is slidably installed inside the hollow tube, and the piston block slides along the inside of the hollow tube; The hollow block has a perforation that connects the hollow tube and the rubber bladder; A control switch is installed at the top of the hollow tube; It also includes an alarm installed on the housing; When the motor shaft rotates axially, the pressure plate squeezes the rubber bladder, causing the hydraulic oil inside the rubber bladder to be forced into the hollow tube. The hydraulic oil pushes the piston block to move along the inside of the hollow tube until it squeezes the control switch to activate the alarm.

2. The permanent magnet variable frequency high-voltage synchronous motor according to claim 1, characterized in that, The alarm is a buzzer, and the alarm is electrically connected to a control switch, which is used to activate the alarm.

3. The permanent magnet variable frequency high-voltage synchronous motor according to claim 1, characterized in that, The junction box includes a housing mounted on an outer casing; a cover is installed on the housing for opening the housing; a conduit for threading wires is installed on the housing; a rubber pad is placed on the conduit away from the housing; three circular holes are formed in the rubber pad for passing power cords through, the inner diameter of the circular holes being smaller than the outer diameter of the power cords; and a pressure cap is installed on the conduit away from the housing for pressing and fixing the rubber pad.

4. The permanent magnet variable frequency high-voltage synchronous motor according to claim 1, characterized in that, The heat dissipation unit includes a first cylinder mounted on a housing; a dustproof component is installed on the side of the housing away from the first cylinder to prevent dust from entering the gaps between the heat sink fins; a second cylinder is interference-fitted onto the side of the first cylinder away from the motor; a first dustproof mesh is installed on the second cylinder; a first movable shaft is rotatably mounted on the side of the second cylinder near the motor; a first fan blade is installed outside the first movable shaft; a first bracket is installed inside the first cylinder, and a transmission component for driving the first movable shaft to rotate is installed on the first bracket, the transmission component being used to transmit motor power to the position of the first movable shaft.

5. The permanent magnet variable frequency high-voltage synchronous motor according to claim 4, characterized in that, The transmission assembly includes a first pipe mounted on a first bracket, the first pipe being filled with coolant; a second bracket installed inside the first pipe; a second movable shaft rotatably mounted on the second bracket, the second movable shaft rotating around its own central axis; a first external magnetic rotor mounted on the motor shaft; internal magnetic rotors mounted on both sides of the second movable shaft; and a second external magnetic rotor mounted on the side of the first movable shaft near the first pipe. When the motor shaft rotates, it drives the first external magnetic rotor to rotate, which in turn drives the adjacent internal magnetic rotor to rotate, thus driving the second movable shaft to rotate. The internal magnetic rotors near the second external magnetic rotor rotate synchronously, and then the second external magnetic rotor is driven to rotate by magnetic force, thereby driving the first movable shaft to rotate, causing the first fan blades to rotate, driving airflow, and allowing the air to pass through the heat dissipation slots to cool the motor.

6. The permanent magnet variable frequency high-voltage synchronous motor according to claim 5, characterized in that, A second pipe is installed outside the first pipe; a third pipe is also installed outside the first pipe; a second fan blade is also installed outside the second movable shaft, the second fan blade being located between the second pipe and the third pipe; when the second movable shaft rotates, it drives the second fan blade to rotate, driving the coolant inside the first pipe to flow, causing the coolant inside the second pipe to be drawn into the first pipe, the coolant inside the first pipe to be injected into the third pipe, and then the coolant inside the third pipe to be injected into the second pipe, and so on, so that the coolant flows inside the first pipe, the second pipe and the third pipe, assisting the motor in cooling down.

7. The permanent magnet variable frequency high-voltage synchronous motor according to claim 6, characterized in that, The second pipe is equidistantly arranged around the outside of the first pipe, and then passes through the gap of the heat sink inside the heat sink groove, and is tightly attached to the heat sink.

8. The permanent magnet variable frequency high-voltage synchronous motor according to claim 6, characterized in that, The third pipe is equidistantly arranged around the outside of the first pipe, then passes through the gap of the heat sink inside the heat sink groove, and is tightly attached to the heat sink.

9. The permanent magnet variable frequency high-voltage synchronous motor according to claim 6, characterized in that, The second and third pipes, located in the same gap between the heat sinks, are connected to each other on the side away from the first pipe, and are filled with coolant.

10. The permanent magnet variable frequency high-voltage synchronous motor according to claim 4, characterized in that, The dustproof component includes a third cylindrical body mounted on the outer shell, the third cylindrical body being an annular cylindrical body that fits around the outside of the heat dissipation groove; it also includes a sleeve block that is interference-fitted onto the third cylindrical body; a second dustproof net is installed on the sleeve block, through which air entering the heat dissipation groove is filtered.

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