Improved permanent magnet synchronous motor dragging device

Abstract

The invention relates to the technical field of dragging devices, and provides an improved permanent magnet synchronous motor dragging device which comprises a motor shell, a stator, a rotor and an output shaft, and further comprises an air cooling mechanism and a cooling mechanism, and the air cooling mechanism is used for blowing air into the motor shell and comprises a first fan blade and a driving shaft; the first fan blades are rotationally arranged in the motor shell through the rotating shaft, the driving shaft is in transmission connection with the rotating shaft through the speed increasing gear set, the cooling mechanism is used for cooling the interior of the motor shell and comprises a cooling pipe network, a heat dissipation pipe network and a circulation assembly, and the cooling pipe network is arranged in the motor shell. The cooling pipe network is arranged outside the motor shell, a plurality of cooling fins are arranged outside the cooling pipe network, and the circulating assembly is used for enabling the heat-conducting medium to circularly flow between the cooling pipe network and the cooling pipe network. By means of the technical scheme, the problem that in the prior art, a dragging device is prone to heating and being damaged due to long-time high-load operation is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of traction devices, and in particular to an improved permanent magnet synchronous motor traction device. Background Art

[0002] The electric traction device consists of an electric motor and its automatic control device. The automatic control device can realize automatic control of mechanical equipment by controlling the starting and braking of the motor, adjusting the speed of the motor, controlling the torque of the motor, and controlling the changes of certain physical parameters according to certain rules. The use of electric traction can not only liberate people from heavy physical labor, but also liberate people from complicated information processing affairs, and can improve the control performance of mechanical equipment, improve product quality and labor productivity.

[0003] The working principle of a permanent magnet synchronous motor is simply to generate a rotating magnetic field by passing alternating current through the stator. The rotor is a permanent magnet, and the magnetic field generated by the stator drives the permanent magnet to rotate at the synchronous speed. The characteristic of a synchronous motor is that the motor will rotate at the synchronous speed regardless of whether it is loaded or not, as long as it is within the load-bearing range of the synchronous motor. The characteristic of a permanent magnet synchronous motor is that the excitation winding of the rotor is replaced with a permanent magnet.

[0004] At present, the permanent magnet synchronous motor is used as the motor of the traction device, and mainly relies on the cooling fan for heat dissipation. During the long-term operation of the motor, especially as a traction device, it is necessary to tow and drag the elevator or other equipment. The motor does more work and the heat will be more serious, which will cause damage to the traction device. The use of cooling fans as a cooling method has a limited effect and can barely meet the daily cooling needs. Under long-term high-load operation, the cooling method needs to be improved. Therefore, we propose an improved permanent magnet synchronous motor traction device, which can provide a relatively stable and effective cooling method for the permanent magnet synchronous motor and reduce the damage to the traction device. Summary of the invention

[0005] The present invention provides an improved permanent magnet synchronous motor traction device, which solves the problem in the prior art that the traction device is easily damaged by heating due to long-term high-load operation.

[0006] The technical solution of the present invention is as follows:

[0007] An improved permanent magnet synchronous motor driving device comprises a motor housing, a stator, a rotor and an output shaft, and also comprises:

[0008] An air cooling mechanism, the air cooling mechanism is used to blow air into the interior of the motor housing, and the air cooling mechanism includes:

[0009] A fan blade 1, wherein the fan blade 1 is rotatably disposed inside the motor housing via a rotating shaft, and the fan blade 1 is located on a side away from the output shaft;

[0010] A driving shaft, the driving shaft is coaxially arranged on a side of the rotor close to the fan blade 1, and the driving shaft is transmission-connected to the rotating shaft via a speed-increasing gear set;

[0011] A cooling mechanism, the cooling mechanism is used to cool the interior of the motor housing, the cooling mechanism comprising:

[0012] A cooling pipe network, wherein the cooling pipe network is arranged inside the motor housing, and the cooling pipe network is located between the fan blade 1 and the stator;

[0013] A heat dissipation network, wherein the heat dissipation network is arranged outside the motor housing, the heat dissipation network is connected to the cooling network, and a plurality of heat dissipation fins are arranged outside the heat dissipation network;

[0014] A circulation component, which is used to circulate the heat transfer medium between the cooling pipe network and the heat dissipation pipe network, and the circulation component includes:

[0015] A drive compartment, wherein the drive compartment is arranged inside the motor housing, and both sides of the drive compartment are connected with a liquid inlet pipe and a liquid outlet pipe, and both the liquid inlet pipe and the liquid outlet pipe are provided with a one-way valve, the liquid inlet pipe is connected with the cooling pipe network, and the liquid outlet pipe is connected with the heat dissipation pipe network;

[0016] A movable plate, the movable plate being sealingly and slidably disposed inside the driving compartment;

[0017] A reciprocating screw is rotatably arranged inside the driving bin, the movable plate is threadedly connected to the reciprocating screw, and the reciprocating screw is transmission-connected to the driving shaft.

[0018] In order to improve the cooling effect of the heat dissipation network, an auxiliary cooling component is also included, and the auxiliary cooling component is used to cool the heat dissipation network. The auxiliary cooling component includes:

[0019] Blade 2, there are a plurality of blades, and blade 2 is rotatably arranged outside the motor housing through a rotating rod, and the rotating rod is transmission-connected to the rotating shaft.

[0020] In order to ensure air circulation in the motor housing and improve the heat dissipation effect, an air inlet is provided on a side of the motor housing away from the output shaft, and an air outlet is provided on a side of the motor housing away from the air inlet.

[0021] In order to prevent external dust and impurities from entering the interior of the motor housing and causing damage to internal components, dustproof nets are provided at the air inlet and the air outlet.

[0022] In order to adjust the air intake and air outlet volume and control the gas flow rate in the motor housing, an adjustment component is also included, and the adjustment component includes:

[0023] A swivel, wherein two swivels are provided, and the two swivels are rotatably provided on both sides of the motor housing respectively, the air inlet and the air outlet are within the corresponding swivel range, and a plurality of mounting openings are provided on the swivel, and the mounting openings correspond to the air inlet or the air outlet one by one, and the dustproof net is provided inside the mounting openings.

[0024] The working principle and beneficial effects of the present invention are:

[0025] 1. In the present invention, the stator winding in the permanent magnet synchronous motor is passed through alternating current to generate a rotating magnetic field, which drives the permanent magnet rotor to rotate. The rotor drives the output shaft to rotate, providing power for the traction device. The rotor drives the drive shaft to rotate, thereby driving the rotating shaft and the fan blades to rotate. The fan blades blow cold air to the stator and the rotor to cool down the inside of the motor housing.

[0026] 2. In the present invention, cooling medium is contained inside the heat dissipation network and the cooling network. The wind generated by the rotation of the fan blade 1 blows the low-temperature air around the cooling network toward the stator and the rotor, thereby assisting in cooling the components and circuits inside the motor housing. At the same time, the rotor drives the drive shaft and the rotating rod to rotate, thereby driving the fan blade 2 to blow air toward the heat dissipation network to cool the cooling medium.

[0027] 3. In the present invention, the rotor drives the driving shaft to rotate, thereby driving the reciprocating screw to rotate, so that the movable plate moves back and forth inside the driving bin. At the same time, under the action of the one-way valve, the cooling medium in the cooling pipe network enters the driving bin from the liquid inlet pipe that deviates from the moving direction of the movable plate, and the cooling medium in the driving bin enters the heat dissipation pipe network from the liquid outlet pipe in the moving direction of the movable plate, thereby realizing the circulation of the cooling medium, ensuring the low temperature of the cooling medium in the cooling pipe network, and thus ensuring the cooling effect on the motor housing.

[0028] 4. In the present invention, the motor housing is connected to the outside world through the air inlet and the air outlet, and air flow is formed with the outside world under the action of the fan blade. The dust and impurities from the outside are prevented from entering through the dustproof net. At the same time, the overlapping area between the installation port and the air inlet or the air outlet can be adjusted by rotating the rotating ring, thereby adjusting the air intake and outlet volume, and flexibly controlling the cooling effect.

[0029] 5. Therefore, compared with the permanent magnet synchronous motor traction device in the prior art, the present invention generates a rotating magnetic field by energizing the stator winding, driving the permanent magnet rotor to rotate, thereby realizing the rotation of the motor. At the same time, the rotor drives the drive shaft to rotate. Under the action of the speed-increasing gear set, the rotating shaft drives the fan blade to rotate rapidly, and the low-temperature air generated by the cooling medium in the cooling pipe network is blown to the stator and the rotor, so as to cool the components and circuits in the motor housing. At the same time, the reciprocating screw is driven to rotate by the driving shaft, so that the cooling medium in the cooling pipe network and the heat dissipation pipe network circulates, and the driving shaft drives the rotating rod and the fan blade to rotate, so as to cool the cooling medium in the cooling pipe network, thereby ensuring the low temperature of the cooling medium, thereby ensuring the cooling effect on the components and circuits in the motor housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Figure 1 It is a schematic structural diagram of the first viewing angle of the entire present invention;

[0032] Figure 2 It is a schematic diagram of the structure of a partial cross-section of the present invention;

[0033] Figure 3 It is a structural schematic diagram of the second viewing angle of the whole invention;

[0034] Figure 4 It is a three-dimensional structural schematic diagram of the air cooling mechanism and the temperature reduction mechanism of the present invention;

[0035] Figure 5 It is a schematic diagram of the planar structure of the air cooling mechanism and the temperature reduction mechanism of the present invention;

[0036] Figure 6 It is a structural schematic diagram of the cooling mechanism of the present invention;

[0037] Figure 7 It is a structural schematic diagram of the air cooling mechanism of the present invention;

[0038] Figure 8 It is a structural schematic diagram of the circulation component of the present invention;

[0039] Fig. 9 It is a structural schematic diagram of the auxiliary cooling component of the present invention;

[0040] Fig.10 A schematic structural diagram of a motor housing of the present invention from a first viewing angle;

[0041] Fig.11 A schematic structural diagram of a motor housing of the present invention from a second viewing angle;

[0042] Fig.12 For the present invention Figure 1A schematic diagram of the local enlarged structure at point A in the middle;

[0043] Fig.13 For the present invention Figure 4 A schematic diagram of the local enlarged structure at B in the middle;

[0044] Fig.14 For the present invention Figure 4 Schematic diagram of the local enlarged structure at point C in the middle.

[0045] In the figure:

[0046] 1. Motor housing; 2. Stator; 3. Rotor; 4. Output shaft; 5. Air inlet; 6. Air outlet; 7. Dust screen;

[0047] 101, fan blade 1; 102, driving shaft; 103, rotating shaft; 104, speed increasing gear set;

[0048] 201, cooling pipe network; 202, heat dissipation pipe network; 203, heat sink;

[0049] 301, driving chamber; 302, moving plate; 303, reciprocating screw; 304, liquid inlet pipe; 305, liquid outlet pipe; 306, one-way valve; 307, driving rod; 308, transmission rod;

[0050] 401, fan blade 2; 402, rotating rod; 403, protective shell; 404, transmission gear;

[0051] 501. Swivel. DETAILED DESCRIPTION

[0052] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] like Figures 1 to 14As shown, this embodiment proposes an improved permanent magnet synchronous motor traction device, including a motor housing 1, a stator 2, a rotor 3 and an output shaft 4. The stator 2 is wound with a three-phase winding, each winding has a phase difference of 120 degrees, and the rotor 3 is internally equipped with a permanent magnet for generating a stable magnetic field. When the stator 2 winding is excited by an AC power supply, a rotating magnetic field is generated, and the permanent magnets on the rotor 3 are synchronously rotated by the magnetic field of the stator 2. This synchronous rotation enables the motor to more efficiently convert electrical energy into mechanical energy and has good speed regulation performance. It also includes an air cooling mechanism and a temperature reduction mechanism. Compared with the permanent magnet synchronous motor traction device in the prior art, the present invention generates a rotating magnetic field by energizing the stator 2 winding to drive the permanent magnet. The magnet rotor 3 rotates to realize the rotation of the motor. At the same time, the rotor 3 drives the driving shaft 102 to rotate. Under the action of the speed-increasing gear set 104, the rotating shaft 103 drives the fan blade 101 to rotate rapidly, and the low-temperature air generated by the cooling medium in the cooling pipe network 201 is blown to the stator 2 and the rotor 3, so as to cool the components and circuits in the motor housing 1. At the same time, the reciprocating screw 303 is driven to rotate by the driving shaft 102, so that the cooling medium in the cooling pipe network 201 and the heat dissipation pipe network 202 circulates. The driving shaft 102 drives the rotating rod 402 and the fan blade 2 401 to rotate, so as to cool the cooling medium in the cooling pipe network 201, thereby ensuring the low temperature of the cooling medium and thus ensuring the cooling effect on the components and circuits in the motor housing 1.

[0054] like Figures 1 to 7 As shown, the air cooling mechanism is used to blow air into the interior of the motor housing 1. The air cooling mechanism includes a fan blade 101 and a drive shaft 102. The fan blade 101 is rotatably arranged inside the motor housing 1 through a rotating shaft 103. The fan blade 101 is located on the side away from the output shaft 4. The drive shaft 102 is coaxially arranged on the side of the rotor 3 close to the fan blade 101. The drive shaft 102 is connected to the rotating shaft 103 through a speed-increasing gear set 104. A support plate is arranged inside the motor housing 1. The rotating shaft 103 is rotatably arranged on the support plate. The speed-increasing gear set 104 consists of a plurality of gears. The large-toothed gear drives the small-toothed gear to rotate, so that the rotation speed of the rotating shaft 103 is higher than that of the driving shaft 102. When the rotor 3 drives the driving shaft 102 to rotate, the rotating shaft 103 drives the fan blade 101 to rotate at a high speed to form cold wind, so as to cool the rotor 3, the stator 2 and other components.

[0055] like Figures 1 to 8As shown, the cooling mechanism is used to cool the inside of the motor housing 1, and the cooling mechanism includes a cooling pipe network 201, a heat dissipation pipe network 202 and a circulation component. The cooling pipe network 201 is arranged inside the motor housing 1, and the cooling pipe network 201 is located between the fan blade 101 and the stator 2. The heat dissipation pipe network 202 is arranged outside the motor housing 1. The heat dissipation pipe network 202 is connected to the cooling pipe network 201, and a plurality of heat dissipation fins 203 are arranged outside the heat dissipation pipe network 202. The circulation component is used to circulate the heat-conducting medium between the cooling pipe network 201 and the heat dissipation pipe network 202. The circulation component includes a driving bin 301, a movable plate 302 and a reciprocating screw 303. The driving bin 301 is arranged on the motor housing 1. Inside the casing 1, both sides of the driving chamber 301 are connected with a liquid inlet pipe 304 and a liquid outlet pipe 305, and a one-way valve 306 is arranged on the liquid inlet pipe 304 and the liquid outlet pipe 305. The liquid inlet pipe 304 is connected with the cooling pipe network 201, and the liquid outlet pipe 305 is connected with the heat dissipation pipe network 202. The movable plate 302 is sealingly slidably arranged inside the driving chamber 301, and the reciprocating screw 303 is rotatably arranged inside the driving chamber 301. The movable plate 302 and the reciprocating screw 303 are threadedly connected, and the reciprocating screw 303 is transmission-connected with the driving shaft 102. The reciprocating screw 303 is coaxially connected with a driving rod 307, and the driving rod 307 is transmission-connected with a transmission rod 308 through a bevel gear set. The transmission rod 30 8 is rotatably arranged inside the motor housing 1, and the transmission rod 308 is connected to the driving shaft 102 through the sprocket chain. When the rotor 3 drives the driving shaft 102 to rotate, the driving rod 307 and the reciprocating screw 303 can be driven to rotate, so that the moving plate 302 can reciprocate inside the driving chamber 301. When the moving plate 302 moves, the pressure on the side away from the moving direction of the moving plate 302 is reduced. Under the action of the one-way valve 306, the cooling medium in the cooling pipe network 201 is sucked into the driving chamber 301 through the liquid inlet pipe 304. At the same time, the pressure on one side of the moving direction of the moving plate 302 is increased, and the cooling medium in the driving chamber 301 is sent to the inside of the heat dissipation pipe network 202 through the liquid outlet pipe 305. When the moving plate 302 moves in the opposite direction, the cooling medium in the cooling network 201 enters the driving compartment 301 through the liquid inlet pipe 304 on the other side, and the cooling medium on the other side of the driving compartment 301 is sent to the interior of the heat dissipation network 202. The heat dissipation network 202 is located outside the motor housing 1, and the cooling medium dissipates heat outward through the surface of the heat dissipation network 202 and the heat sink 203 to ensure the low temperature of the cooling medium. The pipe diameters in the cooling network 201 and the heat dissipation network 202 are small, and the cooling network 201 has more branches, and the heat dissipation network 202 is bent, which further increases the surface area of ​​the cooling network 201 and the heat dissipation network 202, thereby improving the heat exchange effect during the cooling and heat dissipation process.

[0056] like Figures 4 to 9As shown, in order to improve the cooling effect of the heat dissipation network 202, an auxiliary cooling component is also included, and the auxiliary cooling component is used to cool the heat dissipation network 202. The auxiliary cooling component includes a second fan blade 401, and a plurality of second fan blades 401 are provided. The second fan blade 401 is rotatably arranged on the outside of the motor housing 1 through a rotating rod 402, and the rotating rod 402 is transmission-connected to the rotating shaft 103. A protective shell 403 is arranged on the outside of the motor housing 1, and the rotating rod 402 is rotationally arranged on the inside of the protective shell 403. The second fan blade 401 is located inside the protective shell 403, and an air outlet 6 is opened on the protective shell 403. The external fixed sleeve of the rotating rod 402 is provided with a transmission gear. Wheel 404, and multiple transmission gears 404 are arranged for circumferential rotation inside the protective shell 403, two adjacent rotating rods 402 are connected by multiple transmission gears 404, one rotating rod 402 among the multiple rotating rods 402 is connected to the rotating shaft 103 by a sprocket chain, and the rotating shaft 103 is driven to rotate by the driving shaft 102, which can drive the fan blade 101 to rotate, and drive multiple rotating rods 402 to rotate under the action of the sprocket chain, and the rotating rod 402 drives the fan blade 2 401 to rotate to form cold wind, which blows air to the heat dissipation pipe network 202 to cool it down, thereby ensuring the low temperature of the cooling medium and the cooling effect on the motor housing 1.

[0057] like Figures 1 to 11As shown, in order to ensure air circulation in the motor housing 1 and improve the heat dissipation effect, an air inlet 5 is provided on the side of the motor housing 1 away from the output shaft 4, and an air outlet 6 is provided on the side of the motor housing 1 away from the air inlet 5. Dust-proof nets 7 are provided at the air inlet 5 and the air outlet 6. In order to adjust the air intake and air outlet volume and control the gas flow rate in the motor housing 1, an adjusting component is also included. The adjusting component includes a swivel 501. Two swivels 501 are provided. The two swivels 501 are rotatably arranged on both sides of the motor housing 1 respectively. The air inlet 5 and the air outlet 6 are within the range of the corresponding swivel 501. A plurality of mounting ports are provided on the swivel 501. The mounting ports correspond to the air inlet 5 or the air outlet 6 one by one. The dust-proof net 7 is arranged inside the mounting port. By rotating the swivel 501, the overlapping area between the mounting port and the air inlet 5 or the air outlet 6, that is, the ventilation area, can be adjusted to adjust the air intake and air outlet volume, so as to adjust the air intake and air outlet of the motor housing 1. The air in and out are controlled, and an air flow is formed under the rotation of the fan blade 101, so that the outside air enters through the air inlet 5, blows through the stator 2 and the rotor 3, and is discharged from the air outlet 6, and at the same time, part of the heat is taken out of the motor housing 1, so as to achieve heat dissipation and cooling of its internal components. If the rotating ring 501 rotates to drive the installation port away from the air inlet 5 and the air outlet 6, the rotating ring 501 closes the air inlet 5 and the air outlet 6, and the fan blade 101 forms an internal circulation wind in the motor housing 1, and the cold air generated by the cooling medium in the cooling pipe network 201 is circulated in the motor housing 1 to cool the motor housing 1. The air circulation mode can be selected and adjusted, and the dust and impurities from the outside are blocked by the dustproof net 7 to prevent them from entering and damaging the stator 2, the rotor 3 and other components. The air discharged from the air outlet 6 can also cool the output shaft 4 to reduce the heat damage of the output shaft 4.

[0058] The working principle or use process of the improved permanent magnet synchronous motor traction device is as follows:

[0059] The stator 2 winding is energized to generate a rotating magnetic field, which drives the permanent magnet rotor 3 to rotate, and the output shaft 4 of the drive motor to rotate. At the same time, the rotor 3 drives the drive shaft 102 to rotate. Under the action of the speed-increasing gear set 104, the rotating shaft 103 drives the fan blade 101 to rotate rapidly, and the low-temperature air generated by the cooling medium in the cooling pipe network 201 is blown to the stator 2 and the rotor 3, so as to cool the components and circuits in the motor housing 1;

[0060] At the same time, the driving shaft 102 drives the reciprocating screw 303 to rotate, sucking the cooling medium in the cooling pipe network 201 into the driving bin 301, and sending the cooling medium in the driving bin 301 into the heat dissipation pipe network 202. The driving shaft 102 drives the rotating rod 402 and the fan blade 2 401 to rotate, cooling the cooling medium in the cooling pipe network 201, and ensuring the low temperature of the cooling medium in the cooling pipe network 201.

[0061] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An improved permanent magnet synchronous motor driving device, comprising a motor housing (1), a stator (2), a rotor (3) and an output shaft (4), characterized in that: Also includes: An air cooling mechanism, the air cooling mechanism being used to blow air into the interior of the motor housing (1); A cooling mechanism, the cooling mechanism is used to cool the interior of the motor housing (1), the cooling mechanism comprising: A cooling pipe network (201), wherein the cooling pipe network (201) is arranged inside the motor housing (1); A heat dissipation network (202), the heat dissipation network (202) being arranged outside the motor housing (1), the heat dissipation network (202) being connected to the cooling network (201), and a plurality of heat dissipation fins (203) being arranged outside the heat dissipation network (202); A circulation component is used to allow a heat-conducting medium to circulate between the cooling pipe network (201) and the heat dissipation pipe network (202).

2. The improved permanent magnet synchronous motor driving device according to claim 1 is characterized in that: The air cooling mechanism comprises: A fan blade (101), the fan blade (101) being rotatably arranged inside the motor housing (1) via a rotating shaft (103), and the fan blade (101) being located on a side away from the output shaft (4); A driving shaft (102) is coaxially arranged on a side of the rotor (3) close to the fan blade (101), and the driving shaft (102) is transmission-connected to the rotating shaft (103) via a speed-increasing gear set (104).

3. The improved permanent magnet synchronous motor driving device according to claim 2 is characterized in that: The loop components include: A drive chamber (301), the drive chamber (301) being arranged inside the motor housing (1), the two sides of the drive chamber (301) being connected with a liquid inlet pipe (304) and a liquid outlet pipe (305), the liquid inlet pipe (304) and the liquid outlet pipe (305) being provided with a one-way valve (306), the liquid inlet pipe (304) being connected with the cooling pipe network (201), and the liquid outlet pipe (305) being connected with the heat dissipation pipe network (202); A movable plate (302), the movable plate (302) being sealingly slidably disposed inside the driving chamber (301); A reciprocating screw (303), wherein the reciprocating screw (303) is rotatably disposed inside the driving bin (301), the movable plate (302) and the reciprocating screw (303) are threadedly connected, and the reciprocating screw (303) and the driving shaft (102) are transmission-connected.

4. The improved permanent magnet synchronous motor driving device according to claim 3 is characterized in that: It also includes an auxiliary cooling component, which is used to cool the heat dissipation pipe network (202), and the auxiliary cooling component includes: A second fan blade (401), wherein a plurality of the second fan blades (401) are provided, and the second fan blade (401) is rotatably arranged outside the motor housing (1) via a rotating rod (402), and the rotating rod (402) is transmission-connected to the rotating shaft (103).

5. The improved permanent magnet synchronous motor driving device according to claim 4 is characterized in that: An air inlet (5) is provided on a side of the motor housing (1) away from the output shaft (4), and an air outlet (6) is provided on a side of the motor housing (1) away from the air inlet (5).

6. The improved permanent magnet synchronous motor driving device according to claim 5 is characterized in that: Also included is an adjustment component, the adjustment component comprising: A rotating ring (501), wherein two rotating rings (501) are provided, and the two rotating rings (501) are rotatably provided on two sides of the motor housing (1), respectively, and the air inlet (5) and the air outlet (6) are located within the range of the corresponding rotating ring (501), and a plurality of mounting openings are provided on the rotating ring (501), and the mounting openings correspond to the air inlet (5) or the air outlet (6) one by one.

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