High-voltage self-starting permanent magnet synchronous motor

Abstract

The application belongs to the technical field of permanent magnet synchronous motor, and particularly relates to a high-voltage self-starting permanent magnet synchronous motor, which comprises a permanent magnet synchronous motor, a high-voltage self-starting frequency converter, a heat dissipation cavity and a heat dissipation cover. The high-voltage self-starting frequency converter is installed above the permanent magnet synchronous motor, and the heat dissipation cavity is arranged on the front side of the permanent magnet synchronous motor. The permanent magnet synchronous motor comprises a rotating shaft, the outer side of the front end of the rotating shaft is fixed with a fan blade, and the heat dissipation cover is fixedly installed on the front side of the heat dissipation cavity. The heat dissipation cover is provided with through holes on the left and right sides, the inner wall of the through hole is fixed with a sliding rod, the heat dissipation cavity is provided with sleeves on the left and right sides of the front end, the sleeves are inserted into the through holes, the inside of the sleeve is provided with a hole, and the sliding rod is slidingly connected in the hole. The device solves the problem that the heat dissipation performance of the current permanent magnet synchronous motor is relatively traditional, the heat dissipation performance is poor, and the magnet in the motor is damaged due to the slow heat dissipation when the motor is operated at high strength.

Description

Technical Field

[0001] This invention belongs to the field of permanent magnet synchronous motor technology, specifically relating to a high-voltage self-starting permanent magnet synchronous motor. Background Technology

[0002] The main drawback of permanent magnet synchronous motors (PMSMs) is their temperature sensitivity. PMSMs are quite sensitive to temperature. When the ambient temperature rises, the magnetic properties of the permanent magnets decrease, thus affecting the motor's performance. Therefore, the performance of PMSMs may be affected in high-temperature environments. Furthermore, most commercially available PMSMs incorporate frequency converters to handle high-power operation. However, during high-power operation, the traditional method of cooling with a single fan blade is insufficient to quickly dissipate heat from the motor, leading to increased susceptibility to damage and performance degradation. This phenomenon has become a pressing problem for researchers in this field. Summary of the Invention

[0003] The purpose of this invention is to provide a high-voltage self-starting permanent magnet synchronous motor to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-voltage self-starting permanent magnet synchronous motor, comprising a permanent magnet synchronous motor, a high-voltage self-starting frequency converter, a heat dissipation cavity, and a heat dissipation cover. The high-voltage self-starting frequency converter is installed above the permanent magnet synchronous motor, and the heat dissipation cavity is disposed on the front side of the permanent magnet synchronous motor. The permanent magnet synchronous motor includes a rotating shaft, and a fan blade is fixed to the outer side of the front end of the rotating shaft. The heat dissipation cover is fixedly installed on the front side of the heat dissipation cavity. Through holes are provided on both the left and right sides of the heat dissipation cover, and a sliding rod is fixed to the inner wall of the through hole. Sleeves are provided on the left and right sides of the front end of the heat dissipation cavity, and the sleeves are inserted into the through holes. Holes are provided inside the sleeves, and the sliding rods are slidably connected to the holes. A connecting rod is fixed to the front end of the rotating shaft, and an elastic expansion joint is fixed to the front end of the connecting rod. A heat dissipation mesh is fixed to the inner wall of the heat dissipation cover, and the front end of the elastic expansion joint is connected to a bearing on one side of the heat dissipation mesh.

[0005] The present invention further describes that a brush disk is fixed to the outer front end of the elastic expansion joint, and four brush rods are fixedly distributed around the brush disk; a track is fixedly installed on the inner wall of the heat dissipation cavity, and a slider is slidably connected inside the track; a sector tooth is fixed to the outer front end of the connecting rod; several tooth blocks are provided at the lower end of the slider, and the tooth blocks mesh with the sector tooth; a sphere is fixed above the slider; and a pressing rod is fixed to the inner wall of the heat dissipation cover. The lower end of the pressing rod is spherical, and the sphere contacts the spherical part at the lower end of the pressing rod after it moves.

[0006] The present invention further illustrates that a pressure chamber is fixed to the front end of the inner wall of the heat dissipation cavity, and a pressure plate is slidably connected to the inner wall of the pressure chamber. The right side of the pressure plate is fixedly connected to the left side of the slider. The left side of the pressure plate is spring-connected to the left side of the inner wall of the pressure chamber. An impact rod is fixedly installed on the right side of the slider, and the right end of the impact rod contacts the inner wall of the heat dissipation cover.

[0007] The present invention further illustrates that a spring is provided inside the elastic expansion joint.

[0008] The present invention further illustrates that the left side of the air pressure chamber is connected to the interior of the permanent magnet synchronous motor by an air extraction pipe, and the air extraction pipe is equipped with a one-way valve. The left side of the air pressure chamber is connected to the connection between the heat dissipation chamber and the heat dissipation cover by an exhaust pipe, and the exhaust pipe is equipped with a two-way valve.

[0009] The present invention further illustrates that two push rods are fixed on the front side of the sector teeth, and the push rods are in contact with the brush plate.

[0010] The present invention further illustrates that the high-voltage self-starting frequency converter is internally equipped with a voltage self-regulation module, which is used to automatically adjust the voltage according to the torque of the output part of the permanent magnet synchronous motor.

[0011] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention enables the motor to start smoothly through the high-voltage self-starting frequency converter, which improves working efficiency and reduces losses during equipment operation. By adjusting the frequency and voltage, the speed and operating status of the motor can be precisely controlled, avoiding motor overload and overload operation, and ensuring the safety and stability of equipment operation. When the permanent magnet synchronous motor is running, the shaft rotates, driving the fan blades to rotate at high speed, which dissipates the internal heat through the heat dissipation mesh. At the same time, the heat inside the permanent magnet synchronous motor can also be dissipated through the gap between the heat dissipation cover and the heat dissipation cavity, which greatly improves the heat dissipation effect.

[0012] Furthermore, when the motor is running, the slide bar of the heat sink slides forward along the inner wall of the sleeve, increasing the gap between the heat sink and the heat dissipation cavity, thus enhancing the heat dissipation performance. At the same time, the heat sink pulls the elastic expansion joint to extend, and the elastic expansion joint deforms under force. After the ball and the extrusion rod disengage, the elastic expansion joint returns to its original position, thereby reducing the gap again. The heat sink moves back and forth in a reciprocating manner, which can not only enhance the heat dissipation performance but also effectively prevent dust from entering the permanent magnet synchronous motor and damaging it.

[0013] During the heat dissipation process, the impact rod rapidly strikes the inner wall of the heat sink, which can shake off the dust on the heat dissipation mesh. At the same time, due to the reverse compression and friction of the ball against the pressure rod, the force on the slider is buffered, avoiding excessive impact force that could lead to excessive vibration and accelerate the demagnetization of the permanent magnet synchronous motor, thus playing a buffering role. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the fan blade installation position according to the present invention;

[0017] Figure 3 This is a structural plan view of the heat sink and heat dissipation cavity of the present invention;

[0018] Figure 4 This is a schematic diagram of the internal structure of the heat sink and heat dissipation cavity of the present invention;

[0019] Figure 5 This is a schematic diagram of the internal structure of the air pressure chamber of the present invention;

[0020] Figure 6 This is a schematic diagram of the internal structure of the track of the present invention;

[0021] In the diagram: 1. Heat dissipation cavity; 2. Heat dissipation cover; 21. Through hole; 22. Slide rod; 23. Sleeve; 24. Heat dissipation mesh; 25. Track; 251. Slider; 252. Ball; 253. Impact rod; 26. Extrusion rod; 27. Air pressure cavity; 271. Air pressure plate; 272. Air extraction pipe; 273. Exhaust pipe; 3. Rotating shaft; 31. Fan blade; 32. Connecting rod; 321. Fan tooth; 322. Push rod; 33. Elastic expansion joint; 331. Brush plate; 332. Brush rod. Detailed Implementation

[0022] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-6 The present invention provides a technical solution: a high-voltage self-starting permanent magnet synchronous motor, including a permanent magnet synchronous motor, a high-voltage self-starting frequency converter, a heat dissipation cavity 1 and a heat dissipation cover 2. The high-voltage self-starting frequency converter is installed above the permanent magnet synchronous motor, the heat dissipation cavity 1 is located on the front side of the permanent magnet synchronous motor, the permanent magnet synchronous motor includes a rotating shaft 3, a fan blade 31 is fixed on the outer side of the front end of the rotating shaft 3, and the heat dissipation cover 2 is fixedly installed on the front side of the heat dissipation cavity 1.

[0024] The heat sink 2 has through holes 21 on both the left and right sides. A sliding rod 22 is fixed to the inner wall of the through hole 21. A sleeve 23 is provided on the left and right sides of the front end of the heat sink cavity 1. The sleeve 23 is inserted into the through hole 21. The sleeve 23 has a hole inside. The sliding rod 22 is slidably connected to the hole. A connecting rod 32 is fixed to the front end of the rotating shaft 3. An elastic telescopic joint 33 is fixed to the front end of the connecting rod 32. A heat sink mesh 24 is fixed to the inner wall of the heat sink 2. The front end of the elastic telescopic joint 33 is connected to a bearing on one side of the heat sink mesh 24.

[0025] The power supply of the permanent magnet synchronous motor is connected to a high-voltage self-starting frequency converter. Through the control panel or PLC, the required operating parameters and control modes are set. The high-voltage self-starting frequency converter converts the power supply frequency and voltage to the frequency and voltage required by the permanent magnet synchronous motor based on the input parameters, thus starting the motor. After the permanent magnet synchronous motor starts, the frequency and voltage are adjusted by the high-voltage self-starting frequency converter to control the motor speed. When acceleration is required, the frequency and voltage can be gradually increased to gradually increase the motor speed, thereby achieving acceleration and starting. Starting the motor through the high-voltage self-starting frequency converter ensures smooth motor starting, improves work efficiency, and reduces equipment losses during operation. By adjusting the frequency and voltage, the motor speed and operating status can be precisely controlled, avoiding motor overload and ensuring the safety and stability of equipment operation. When the permanent magnet synchronous motor is running, the shaft 3 rotates, driving the fan blades 31 to rotate at high speed, dissipating internal heat through the heat dissipation mesh 24. Simultaneously, the internal heat of the permanent magnet synchronous motor can also be dissipated through the gap between the heat dissipation cover 2 and the heat dissipation cavity 1, greatly improving the heat dissipation effect.

[0026] A brush plate 331 is fixed to the outer front end of the elastic telescopic joint 33, and four brush rods 332 are fixed around the brush plate 331.

[0027] A track 25 is fixedly installed on the inner wall of the heat dissipation cavity 1. A slider 251 is slidably connected inside the track 25. A sector tooth 321 is fixed on the outer side of the front end of the connecting rod 32. Several tooth blocks are provided at the lower end of the slider 251, and the tooth blocks mesh with the sector tooth 321. A ball 252 is fixed above the slider 251. A pressing rod 26 is fixed on the inner wall of the heat dissipation cover 2. The lower end of the pressing rod 26 is spherical, and the ball 252 contacts the spherical part at the lower end of the pressing rod 26 after it moves.

[0028] When the rotating shaft 3 rotates, it drives the elastic telescopic joint 33 to rotate through the connecting rod 32. The elastic telescopic joint 33 drives the brush rod 332 to rotate around the center through the brush plate 331, thereby performing a rolling brush on the heat dissipation mesh 24 to brush off the dust adhering to the heat dissipation mesh 24 and ensure the heat dissipation effect.

[0029] Simultaneously, when the connecting rod 32 rotates, it drives the sector tooth 321 to rotate. The sector tooth 321, through meshing, drives the slider 251 to slide to the left along the track 25. The slider 251 drives the ball 252 to move. The ball 252 and the lower end of the extrusion rod 26 squeeze and rub against each other. By pushing the extrusion rod 26, the heat sink 2 moves forward. The slide rod 22 of the heat sink 2 slides forward along the inner wall of the sleeve 23. The gap between the heat sink 2 and the heat sink cavity 1 increases, and the heat dissipation performance is enhanced. At the same time, the heat sink 2 pulls the elastic expansion joint 33 to extend. The elastic expansion joint 33 deforms under force. After the ball 252 and the extrusion rod 26 are no longer in contact, the elastic expansion joint 33 returns to its original position, thereby making the gap smaller again. The heat sink 2 moves back and forth in a reciprocating manner, which can not only enhance the heat dissipation performance, but also effectively prevent dust from entering the permanent magnet synchronous motor and damaging the motor.

[0030] A pressure chamber 27 is fixed to the front end of the inner wall of the heat dissipation cavity 1. A pressure plate 271 is slidably connected to the inner wall of the pressure chamber 27. The right side of the pressure plate 271 is fixedly connected to the left side of the slider 251.

[0031] The left side of the air pressure plate 271 is spring-connected to the left side of the inner wall of the air pressure chamber 27, and the right side of the slider 251 is fixedly installed with an impact rod 253, the right end of the impact rod 253 is in contact with the inner wall of the heat sink 2.

[0032] When slider 251 moves to the left, it causes pneumatic plate 271 to slide to the left along the inner wall of pneumatic chamber 27. The spring deforms under force, and at the same time, slider 251 causes impact rod 253 to disengage from the inner wall of heat sink 2. Then, sector tooth 321 disengages from slider 251, and the spring generates a reaction force that causes pneumatic plate 271 to quickly return to its original position. This causes impact rod 253 to quickly impact the inner wall of heat sink 2, which can shake off the dust on heat sink mesh 24. At the same time, due to the reverse compression and friction of ball 252 against compression rod 26, the force on slider 251 is buffered, avoiding excessive impact force that could cause large vibrations and accelerate the demagnetization of permanent magnet synchronous motor, thus playing a buffering role.

[0033] The elastic expansion joint 33 is internally equipped with a spring;

[0034] After the elastic expansion joint 33 is extended, it returns to its original position. At this time, the impact rod 253 impacts the inner wall of the heat sink 2. Through the reaction force generated by the elastic spring in the elastic expansion joint 33, the compression rod 26 is quickly reset. Its elasticity can further reduce the vibration intensity and enhance the shock absorption effect.

[0035] The left side of the air pressure chamber 27 is connected to the inside of the permanent magnet synchronous motor by an air extraction pipe 272, and a one-way valve is installed inside the air extraction pipe 272. The left side of the air pressure chamber 27 is connected to the connection between the heat dissipation chamber 1 and the heat dissipation cover 2 by an exhaust pipe 273, and a one-way valve is installed inside the exhaust pipe 273.

[0036] When the air pressure plate 271 slides left and right along the inner wall of the air pressure chamber 27, it first extracts the heat inside the permanent magnet synchronous motor through the air extraction pipe 272 and quickly discharges it through the exhaust pipe 273. The hot air is quickly discharged through the gap between the heat sink 2 and the heat sink 1. When the air pressure chamber 27 is venting, the gap between the heat sink 2 and the heat sink 1 is large, the exhaust effect is good, the heat can be discharged from the permanent magnet synchronous motor faster, and the heat dissipation performance is further enhanced.

[0037] Two push rods 322 are fixed to the front side of the sector tooth 321, and the push rods 322 are in contact with the brush plate 331;

[0038] After the ball 252 disengages from the squeezing rod 26, the elastic telescopic joint 33 quickly resets via its internal spring, thereby causing the brush plate 331 to reset quickly. After resetting, the brush plate 331 squeezes against the push rod 322, and the push rod 322 pushes the brush plate 331 forward slightly, thereby inserting the bristles of the brush rod 332 into the hole of the heat dissipation mesh 24, pushing out stubborn dust, further improving the cleaning effect, maintaining high-intensity heat dissipation at all times, and enhancing the protection performance of the permanent magnet synchronous motor.

[0039] The high-voltage self-starting frequency converter is equipped with a voltage self-regulation module, which is used to automatically adjust the voltage according to the torque of the permanent magnet synchronous motor output.

[0040] The greater the torque applied to a permanent magnet synchronous motor, the higher its voltage. This allows it to smoothly and stably rotate objects, while also saving energy by reducing the voltage when the torque is low.

[0041] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-voltage self-starting permanent magnet synchronous motor, comprising a permanent magnet synchronous motor, a high-voltage self-starting frequency converter, a heat dissipation cavity (1), and a heat dissipation cover (2), characterized in that: The high-voltage self-starting frequency converter is installed above the permanent magnet synchronous motor. The heat dissipation cavity (1) is located on the front side of the permanent magnet synchronous motor. The permanent magnet synchronous motor includes a rotating shaft (3). A fan blade (31) is fixed on the outer side of the front end of the rotating shaft (3). The heat dissipation cover (2) is fixedly installed on the front side of the heat dissipation cavity (1). The heat sink (2) has through holes (21) on both the left and right sides. A sliding rod (22) is fixed to the inner wall of the through hole (21). A sleeve (23) is provided on the left and right sides of the front end of the heat sink (1). The sleeve (23) is inserted into the through hole (21). The sleeve (23) has a hole inside. The sliding rod (22) is slidably connected to the hole. A connecting rod (32) is fixed to the front end of the rotating shaft (3). An elastic telescopic joint (33) is fixed to the front end of the connecting rod (32). A heat sink mesh (24) is fixed to the inner wall of the heat sink (2). The front end of the elastic telescopic joint (33) is connected to a bearing on one side of the heat sink mesh (24). A brush plate (331) is fixed to the outer front end of the elastic expansion joint (33), and four brush rods (332) are fixed around the brush plate (331). The inner wall of the heat dissipation cavity (1) is fixedly installed with a track (25), and a slider (251) is slidably connected inside the track (25). A sector tooth (321) is fixed on the outer side of the front end of the connecting rod (32). Several tooth blocks are provided at the lower end of the slider (251), and the tooth blocks mesh with the sector tooth (321). A ball (252) is fixed above the slider (251). A pressing rod (26) is fixed on the inner wall of the heat dissipation cover (2). The lower end of the pressing rod (26) is spherical, and the ball (252) contacts the spherical part at the lower end of the pressing rod (26) after it moves.

2. The high-voltage self-starting permanent magnet synchronous motor according to claim 1, characterized in that: The front end of the inner wall of the heat dissipation cavity (1) is fixed with a pressure chamber (27), and a pressure plate (271) is slidably connected to the inner wall of the pressure chamber (27). The right side of the pressure plate (271) is fixedly connected to the left side of the slider (251). The left side of the air pressure plate (271) is spring-connected to the left side of the inner wall of the air pressure chamber (27), and the right side of the slider (251) is fixedly installed with an impact rod (253), the right end of which is in contact with the inner wall of the heat sink (2).

3. A high-voltage self-starting permanent magnet synchronous motor according to claim 2, characterized in that: The elastic expansion joint (33) is internally equipped with a spring.

4. A high-voltage self-starting permanent magnet synchronous motor according to claim 3, characterized in that: The left side of the air pressure chamber (27) is connected to the interior of the permanent magnet synchronous motor by an air extraction pipe (272), and the interior of the air extraction pipe (272) is equipped with a one-way valve. The left side of the air pressure chamber (27) is connected to the connection between the heat dissipation chamber (1) and the heat dissipation cover (2), and the interior of the exhaust pipe (273) is equipped with a one-way valve.

5. A high-voltage self-starting permanent magnet synchronous motor according to claim 4, characterized in that: Two push rods (322) are fixed to the front side of the sector tooth (321), and the push rods (322) are in contact with the brush plate (331).

6. A high-voltage self-starting permanent magnet synchronous motor according to claim 5, characterized in that: The high-voltage self-starting frequency converter is equipped with a voltage self-regulation module, which is used to automatically adjust the voltage according to the torque of the output part of the permanent magnet synchronous motor.

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