A synchronous permanent magnet motor

Abstract

The application relates to the motor technical field, in particular to a synchronous permanent magnet motor, which comprises a machine base, a stator sleeve, a positioning ring, a rear end cover, a wind power heat dissipation device and a refrigeration device, a sliding groove and a fixing ring are arranged on the inner wall of the machine base, a fixing rod is arranged on one side of the fixing ring, the stator sleeve can be fixed in the machine base through the positioning ring and the fixing ring, the stability of the structure during use is improved, a cooling pipe and a heat conduction plate are arranged in the cooling groove, a liquid guide pipe is arranged in the connecting groove, the liquid guide pipe is communicated with the cooling pipe, the other end of the liquid guide pipe is connected with the refrigeration device, a plurality of air outlet pipes and temperature sensors are arranged on the inner wall of the annular groove, the structure can be provided with water cooling heat dissipation through the arranged refrigeration device and the cooling pipe, the structure can be provided with the wind power heat dissipation effect through the arranged wind power heat dissipation device, and therefore the service life of the structure is improved.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically to a synchronous permanent magnet motor. Background Technology

[0002] As is well known, a permanent magnet synchronous motor (PMSM) is a synchronous motor that generates a synchronous rotating magnetic field by exciting permanent magnets. The permanent magnets act as the rotor, generating the rotating magnetic field. Under the influence of this rotating magnetic field, the three-phase stator windings induce three-phase symmetrical currents through armature reaction. When the rotor's kinetic energy is converted into electrical energy, the PMSM functions as a generator. Furthermore, when a three-phase symmetrical current is applied to the stator side, because the three-phase stators are 120° out of phase in space, the three-phase stator currents generate a rotating magnetic field in space. The rotor moves under the influence of electromagnetic force within this rotating magnetic field, and at this time, electrical energy is converted into kinetic energy, and the PMSM functions as a motor.

[0003] Permanent magnet materials are the key materials for permanent magnet motors. During the manufacturing, testing and use of the motor, due to unreasonable heat dissipation circulation inside the motor, the local heat of the motor becomes too high. The heating of the windings exceeds the heat exchange level of the motor's heat exchange system, which causes the motor to lose magnetism due to excessive temperature. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a synchronous permanent magnet motor.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a synchronous permanent magnet motor, comprising a frame, a stator sleeve, a positioning ring, a rear end cover, a fan-driven cooling device, and a cooling device. The bottom of the frame is provided with a fixed base and a junction box. The inner wall of the frame is provided with a sliding groove and a fixing ring. The fixing ring is located at the rear end of the frame, and a fixing rod is provided on one side of the fixing ring. The sliding groove is located at the front end of the frame, and a fastening hole is provided at the bottom of the sliding groove. The stator sleeve is located inside the frame, and multiple stator cores are located on the inner wall of the stator sleeve. Both ends of the sleeve are provided with positioning holes. The positioning hole at one end of the sleeve cooperates with the fixing rod. The positioning ring is located at the other end of the stator sleeve. Multiple sliders are provided on the edge of the positioning ring. Each slider is provided with a fixing screw. The slider cooperates with the sliding groove. The fixing screws cooperate with the through sliders and with the fastening holes. One end of the positioning ring is provided with a positioning rod. The positioning rod cooperates with the positioning hole at the other end of the stator sleeve. A heat-conducting layer is provided on the inner wall of the machine base. The heat-conducting layer is in close contact with the outer wall of the stator sleeve. Multiple... A cooling tank is provided, with a connecting groove between the cooling tanks. An elastic rod is provided at the top of each cooling tank. Cooling pipes and heat-conducting plates are located inside each cooling tank, with the heat-conducting plates positioned on both sides of the cooling pipes. A liquid guide pipe is provided inside the connecting groove, communicating with the cooling pipes. The other end of the liquid guide pipe is connected to a refrigeration device. Multiple mounting plates are provided at the rear end of the base. A rear end cover is located at the rear end of the base. Multiple fixing plates are provided on the outer wall of the rear end cover. Mounting bolts are provided between the fixing plates and the mounting plates. A limiting seat is provided on the rear end cover. The limiting seat is provided with a bearing cover, and the bearing cover is provided with a bearing seat located inside the machine base. Limiting plates are provided on both sides of the bearing cover, and limiting bolts are provided on the limiting plates. An annular groove is provided on the inner wall of the bearing cover, and multiple air outlet pipes and temperature sensors are provided on the inner wall of the annular groove. An installation groove is provided on the outer wall of the bearing cover, and a ventilation pipe is provided in the installation groove. The ventilation pipe is connected to the air outlet pipe, and a control valve is provided on the air outlet pipe. An air guide pipe is provided at the other end of the ventilation pipe, and the other end of the air guide pipe is connected to a wind-powered cooling device.

[0008] To improve the practicality of this structure, the present invention includes the following improvement: the control valve is a solenoid valve, and the control valve is connected to the temperature sensor via an electrical signal.

[0009] To improve the heat dissipation effect of this structure, the present invention includes the following improvements: one side of the heat-conducting plate is provided with multiple protrusions, and the heat-conducting plate is provided with through holes; one side of the elastic rod is provided with multiple vent holes.

[0010] To facilitate the installation of the bearing cover, the present invention includes the following improvements: the inner wall of the limiting seat is provided with a slot, the outer wall of the bearing seat is provided with a first buffer groove and a second buffer groove, the second buffer groove is located at the bottom of the first buffer groove, a locking block is provided inside the second buffer groove, a buffer rod is provided at the bottom of the locking block, the buffer rod is located inside the second buffer groove, and a spring is provided inside the second buffer groove.

[0011] To make the stator sleeve more securely installed, the present invention is improved in that the positioning hole and the fixing rod, as well as the positioning rod, are all interference fits.

[0012] To facilitate the disassembly of the stator sleeve, the present invention includes an improvement in which one side of the positioning ring is provided with a plurality of first threaded grooves, and one side of the stator sleeve is provided with a plurality of second threaded grooves.

[0013] To improve the performance of this structure, the present invention includes the following improvements: the lower end of the fixed base is provided with a base, a fixing bolt is provided between the base and the fixed base, the locking block is a trapezoidal structure, auxiliary blocks are provided on both sides of the locking block, an auxiliary groove is provided on the inner wall of the first buffer groove, and the auxiliary blocks and the auxiliary groove cooperate with each other.

[0014] To make this structure more energy-efficient, the present invention includes an improvement in that the outer walls of both the liquid guide tube and the cooling tube are provided with heat-insulating sleeves, which are made of polyurethane insulation material.

[0015] To make the structure more stable during use, the present invention includes an adhesive pad provided on the inner wall of the connecting groove.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a synchronous permanent magnet motor, which has the following beneficial effects:

[0018] The synchronous permanent magnet motor has a sliding groove and a fixing ring on the inner wall of the base. The fixing ring is located at the rear end of the base, and a fixing rod is provided on one side of the fixing ring. The positioning ring and the fixing ring can fix the stator sleeve inside the base, which improves the stability of the structure during use.

[0019] The cooling tank is equipped with cooling pipes and heat-conducting plates inside. The heat-conducting plates are located on both sides of the cooling pipes. The connecting tank is equipped with liquid guide pipes inside, which are connected to the cooling pipes. The other end of the liquid guide pipes is connected to a refrigeration device. The inner wall of the annular tank is equipped with multiple air outlet pipes and temperature sensors. Through the provided refrigeration device and cooling pipes, the structure can be provided with water cooling and air cooling. Through the provided air cooling device, the structure can be provided with air cooling, thereby improving the service life of the structure.

[0020] The positioning ring has multiple first threaded grooves on one side, and the stator sleeve has multiple second threaded grooves on one side. The first and second threaded grooves make the stator sleeve easy to disassemble and maintain. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 Side view;

[0023] Figure 3 For the present invention Figure 2 Side view;

[0024] Figure 4 For the present invention Figure 2 Schematic diagram of the intermediate cooling tank;

[0025] Figure 5 For the present invention Figure 3 Schematic diagram of the structure at the bearing cap;

[0026] Figure 6 This is a schematic diagram of the heat-conducting plate in this invention;

[0027] Figure 7 This is a schematic diagram of the liquid guiding tube in this invention;

[0028] In the diagram: 1. Base; 2. Stator sleeve; 3. Positioning ring; 4. Annular groove; 5. Fixed seat; 6. Base; 7. Slider; 8. Fixing screw; 9. First threaded groove; 10. Stator core; 11. Positioning hole; 12. Second threaded groove; 13. Slide groove; 14. Fixed ring; 15. Fixed rod; 16. Connecting groove; 17. Cooling groove; 18. Mounting plate; 19. Bearing seat; 20. Limiting seat; 21. Rear end cover; 22. Fixing plate; 23. Mounting bolt; 24. Manufacturing process. 25. Cooling device; 26. Liquid guide pipe; 27. Air outlet pipe; 28. Wind-powered cooling device; 29. ​​Air guide pipe; 30. Ventilation pipe; 31. Control valve; 32. Temperature sensor; 33. Junction box; 34. Mounting slot; 35. Positioning rod; 36. Bearing cover; 37. Limiting plate; 38. Elastic rod; 39. Vent hole; 40. Heat conduction plate; 41. Cooling pipe; 42. Buffer rod; 43. First buffer groove; 44. Locking block; 45. Spring; 46. Second buffer groove; 47. Locking slot. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1-7This invention discloses a synchronous permanent magnet motor, comprising a frame 1, a stator sleeve 2, a positioning ring 3, a rear end cover 21, a fan-driven cooling device 27, and a cooling device 24. The frame 1 has a fixed base 5 and a junction box 32 at its bottom. The inner wall of the frame 1 has a sliding groove 13 and a fixing ring 14. The fixing ring 14 is located at the rear end of the frame 1, and a fixing rod 15 is provided on one side of the fixing ring 14. The sliding groove 13 is located at the front end of the frame 1, and a fastening hole is provided at the bottom of the sliding groove 13. The stator sleeve 2 is located inside the frame 1, and multiple stator cores 10 are mounted on the inner wall of the stator sleeve 2. Positioning holes 11 are provided at both ends of the stator sleeve 2. The positioning hole 11 at one end of the cylinder cooperates with the fixing rod 15. The positioning ring 3 is located at the other end of the stator sleeve 2. Multiple sliders 7 are provided on the edge of the positioning ring 3. The sliders 7 are provided with fixing screws 8. The sliders 7 cooperate with the sliding groove 13. The fixing screws 8 penetrate the sliders 7 and cooperate with the fastening holes. One end of the positioning ring 3 is provided with a positioning rod 34. The positioning rod 34 cooperates with the positioning hole 11 at the other end of the stator sleeve 2. A heat-conducting layer is provided on the inner wall of the machine base 1. The heat-conducting layer is in close contact with the outer wall of the stator sleeve 2. Multiple cooling grooves 17 are provided on the outer wall of the machine base 1. Connecting grooves 16 are provided between the cooling grooves 17. The top of the cooling tank 17 is provided with an elastic rod 37. The interior of the cooling tank 17 is provided with a cooling pipe 40 and a heat-conducting plate 39. The heat-conducting plate 39 is located on both sides of the cooling pipe 40. The interior of the connecting groove 16 is provided with a liquid guide pipe 25, which communicates with the cooling pipe 40. The other end of the liquid guide pipe 25 is connected to a refrigeration device 24. The rear end of the base 1 is provided with multiple mounting plates 18. The rear end cover 21 is located at the rear end of the base 1. The outer wall of the rear end cover 21 is provided with multiple fixing plates 22. Mounting bolts 23 are provided between the fixing plates 22 and the mounting plates 18. The rear end cover 21 is provided with a limiting seat 20, and a bearing cover 3 is provided on the limiting seat 20. 5. The bearing cover 35 is provided with a bearing seat 19, which is located inside the base 1. Limiting plates 36 are provided on both sides of the bearing cover 35, and limiting bolts are provided on the limiting plates 36. An annular groove 4 is provided on the inner wall of the bearing cover 35. Multiple air outlet pipes 26 and temperature sensors 31 are provided on the inner wall of the annular groove 4. An installation groove 33 is provided on the outer wall of the bearing cover 35. A ventilation pipe 29 is provided in the installation groove 33. The ventilation pipe 29 is connected to the air outlet pipe 26. A control valve 30 is provided on the air outlet pipe 26. An air guide pipe 28 is provided at the other end of the ventilation pipe 29. The other end of the air guide pipe 28 is connected to a wind-powered heat dissipation device 27.

[0031] To improve the practicality of this structure, the present invention includes the following improvements: the control valve 30 is a solenoid valve, and the control valve 30 is connected to the temperature sensor 31 via an electrical signal. Here, the temperature sensor 31 can constantly detect the temperature inside the base 1. In the initial state, both control valves 30 are closed and both are open. When the temperature inside the base 1 is higher than a specified value, the temperature sensor 31 will use an electrical signal to selectively open the control valves 30, thereby increasing the degree of airflow cooling. When the temperature inside the base 1 drops below the specified value, the temperature sensor 31 will use an electrical signal to selectively close the control valves 30, thereby reducing the degree of airflow cooling.

[0032] To improve the heat dissipation effect of this structure, the present invention includes the following improvements: a plurality of protrusions are provided on one side of the heat-conducting plate 39, and through holes are provided on the heat-conducting plate 39; a plurality of vent holes 38 are provided on one side of the elastic rod 37. Here, the protrusions can increase the heat dissipation area of ​​the heat-conducting plate 39, the through holes can improve the air flow at the heat-conducting plate 39, and the vent holes 38 can improve the air flow at the cooling groove 17.

[0033] To facilitate the installation of the bearing cover 35, the present invention includes the following improvements: a groove 46 is provided on the inner wall of the limiting seat 20, and a first buffer groove 42 and a second buffer groove 45 are provided on the outer wall of the bearing seat 19. The second buffer groove 45 is located at the bottom of the first buffer groove 42, and a locking block 43 is provided inside the second buffer groove 45. A buffer rod 41 is provided at the bottom of the locking block 43, and the buffer rod 41 is located inside the second buffer groove 45. A spring 44 is provided inside the second buffer groove 45. When installing the bearing cover 35, the bearing seat 19 is inserted into the limiting seat 20. At this time, the spring 44 in the second buffer groove 45 will apply a spring force to the buffer rod 41, causing the buffer rod 41 to pop out. The buffer rod 41 will further cause the locking block 43 to pop out of the first buffer groove 42. At this time, the locking block 43 is located inside the groove 46, thereby achieving the positioning of the bearing cover 35 and further facilitating the tightening of the limiting bolts on the limiting plate 36.

[0034] To make the stator sleeve 2 more securely installed, the present invention is improved in that the positioning hole 11 and the fixing rod 15 and the positioning rod 34 are all interference fits.

[0035] To facilitate the disassembly of the stator sleeve 2, the present invention includes the following improvements: one side of the positioning ring 3 is provided with multiple first threaded grooves 9, and one side of the stator sleeve 2 is provided with multiple second threaded grooves 12. Here, when it is necessary to disassemble the stator sleeve 2, firstly, the positioning rod 34 on the slider 7 is loosened, and then the designated screw is inserted into the first threaded groove 9. The positioning ring 3 is pulled out from the inner wall of the machine base 1 by the screw. Then, the designated screw is inserted into the second threaded groove 12, and then the stator sleeve 2 is pulled out from inside the machine base 1 by the screw. At this time, both the fixing rod 15 and the positioning rod 34 are disengaged from the positioning hole 11. The structure is simple and the operation is convenient.

[0036] To improve the performance of this structure, the present invention includes the following improvements: a base 6 is provided at the lower end of the fixed seat 5, a fixing bolt is provided between the base 6 and the fixed seat 5, the locking block 43 has a trapezoidal structure, auxiliary blocks are provided on both sides of the locking block 43, and an auxiliary groove is provided on the inner wall of the first buffer groove 42. The auxiliary blocks and the auxiliary groove cooperate with each other. Here, after loosening the fixing bolt, the base 6 of different sizes can be replaced at the lower end of the fixed seat 5. The trapezoidal structure of the locking block 43 makes it easier to engage the bearing cover 35 on the limiting seat 20. The cooperation between the auxiliary blocks and the auxiliary groove prevents the locking block 43 from disengaging from the first buffer groove 42.

[0037] To make this structure more energy-efficient, the present invention includes an improvement whereby an insulating sleeve is provided on the outer wall of both the liquid guide pipe 25 and the cooling pipe 40. The insulating sleeve is made of polyurethane insulation material. Here, the insulating sleeve can keep the liquid in the liquid guide pipe 25 and the cooling pipe 40 warm. Polyurethane insulation material is a synthetic material, and its overall performance is relatively good. Polyurethane insulation material has good strength and a relatively low thermal conductivity, resulting in good insulation effect.

[0038] To make the structure more stable during use, the present invention includes an adhesive pad on the inner wall of the connecting groove 16. Here, the adhesive pad makes the liquid guide tube 25 more secure in the connecting groove 16.

[0039] In summary, the synchronous permanent magnet motor of the present invention is used in this invention. This structure only describes the frame 1 part of the synchronous permanent magnet motor; the other parts are not explained in detail here. The wiring of this structure is handled through the junction box 32, and the structure can be fixed in a designated position through the fixing base 5. The positions of the fan-powered heat dissipation device 27 and the cooling device 24 can be installed on both sides of the frame 1; the specific positional relationship is not mandatory here. The fixing ring 14 is fixed to the inner wall of the frame 1. First, the positioning hole 11 at one end of the stator sleeve 2 is inserted into the fixing rod 15 at one end of the fixing ring 14. At this time, the stator sleeve 2 will be inside the frame 1. After initial fixing, the positioning ring 3 is placed at the front end of the stator sleeve 2, so that the positioning rod 34 at one end of the positioning ring 3 is inserted into the positioning hole 11 at the other end of the stator sleeve 2. At this time, the slider 7 is located inside the slide groove 13. Then, the fixing screws 8 on the slider 7 are tightened at the fastening holes. Here, the positioning ring 3 and the fixing ring 14 can fix the stator sleeve 2 inside the machine base 1, preventing the stator sleeve 2 from loosening on the inner wall of the machine base 1, thus improving the stability of the structure during use. The mounting bolts 23 on the fixing plate 22 pass through the mounting plate 18, thereby fixing the rear end cover 21 on the machine base. The rear end of 1 is fixed, and the limiting bolts on the limiting plate 36 are tightened on the limiting seat 20. At this time, the bearing cover 35 can be fixed on the limiting seat 20. Here, the limiting seat 20 facilitates the disassembly of the bearing seat 19, further improving the practicality of this structure. The coolant in the refrigeration device 24 flows into the cooling pipe 40 through the liquid guide pipe 25. The cooling pipe 40 can perform water cooling heat dissipation on the heat-conducting plate 39 in the cooling tank 17. The heat generated by the stator sleeve 2 is conducted to the heat-conducting plate 39 through the heat-conducting layer, and the heat is dissipated to the outside through the heat-conducting plate 39. When the cooling pipe 40 is installed, the heat is transferred through the heat-conducting layer to the heat-conducting plate 39. The elastic rod 37 can limit the cooling pipe 40 to prevent it from detaching from the cooling tank 17. At the same time, the fan-driven cooling device 27 will introduce natural air through the air guide pipe 28 into the ventilation pipe 29 in the mounting slot 33, and then through the ventilation pipe 29 into the air outlet pipe 26. Air will be blown into the interior of the base 1 from the air outlet pipe 26. The control valve 30 controls the opening and closing of the air outlet pipe 26. Here, the provided cooling device 24 and cooling pipe 40 can provide water cooling for this structure, and the provided fan-driven cooling device 27 can provide fan-driven cooling for this structure, thereby improving the service life of this structure.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A synchronous permanent magnet motor, characterized in that, The system includes a base (1), a stator sleeve (2), a positioning ring (3), a rear end cover (21), a fan-driven heat dissipation device (27), and a cooling device (24). The base (1) has a fixed seat (5) and a junction box (32) at its bottom. The inner wall of the base (1) has a sliding groove (13) and a fixing ring (14). The fixing ring (14) is located at the rear end of the base (1), and a fixing rod (15) is provided on one side of the fixing ring (14). The sliding groove (13) is located at the front end of the base (1), and a fastening hole is provided at the bottom of the sliding groove (13). The stator sleeve (2) is located inside the base (1), and multiple stator cores (10) are located on the inner wall of the stator sleeve (2). Positioning holes are provided at both ends of the stator sleeve (2). 11), the positioning hole (11) at one end of the sleeve cooperates with the fixing rod (15), the positioning ring (3) is located at the other end of the stator sleeve (2), the edge of the positioning ring (3) is provided with multiple sliders (7), the sliders (7) are provided with fixing screws (8), the sliders (7) cooperate with the slide groove (13), the fixing screws (8) cooperate with the through sliders (7) and with the fastening hole, one end of the positioning ring (3) is provided with a positioning rod (34), the positioning rod (34) cooperates with the positioning hole (11) at the other end of the stator sleeve (2), the inner wall of the machine base (1) is provided with a heat-conducting layer, the heat-conducting layer is in close contact with the outer wall of the stator sleeve (2), the outer wall of the machine base (1) is provided with multiple cooling grooves (17). The cooling tanks (17) are provided with connecting grooves (16), and the top of the cooling tanks (17) is provided with elastic rods (37). The cooling tanks (17) are provided with cooling pipes (40) and heat-conducting plates (39) inside. The heat-conducting plates (39) are located on both sides of the cooling pipes (40). The connecting grooves (16) are provided with liquid guide pipes (25) inside. The liquid guide pipes (25) are connected to the cooling pipes (40). The other end of the liquid guide pipes (25) is connected to a refrigeration device (24). The rear end of the base (1) is provided with multiple mounting plates (18). The rear end cover (21) is located at the rear end of the base (1). The outer wall of the rear end cover (21) is provided with multiple fixing plates (22). The fixing plates (22) are connected to the mounting plates (18). The bearing cover (21) is provided with mounting bolts (23), and a limiting seat (20) is provided on the rear end cover (21). A bearing cover (35) is provided on the limiting seat (20), and a bearing seat (19) is provided on the bearing cover (35). The bearing seat (19) is located inside the base (1). Limiting plates (36) are provided on both sides of the bearing cover (35), and limiting bolts are provided on the limiting plates (36). An annular groove (4) is provided on the inner wall of the bearing cover (35). Multiple air outlet pipes (26) and a temperature sensor (31) are provided on the inner wall of the annular groove (4). An installation groove (33) is provided on the outer wall of the bearing cover (35). A ventilation pipe (29) is provided in the installation groove (33), and the ventilation pipe (29) is connected to the air outlet pipe (26).The air outlet duct (26) is equipped with a control valve (30), and the other end of the ventilation duct (29) is equipped with an air guide duct (28), the other end of which is connected to a wind-powered cooling device (27).

2. A synchronous permanent magnet motor according to claim 1, characterized in that, The control valve (30) is a solenoid valve, and the control valve (30) is connected to the temperature sensor (31) via an electrical signal.

3. A synchronous permanent magnet motor according to claim 2, characterized in that, The heat-conducting plate (39) has multiple protrusions on one side and through holes on the heat-conducting plate (39), and the elastic rod (37) has multiple vent holes (38) on one side.

4. A synchronous permanent magnet motor according to claim 3, characterized in that, The inner wall of the limiting seat (20) is provided with a slot (46), and the outer wall of the bearing seat (19) is provided with a first buffer groove (42) and a second buffer groove (45). The second buffer groove (45) is located at the bottom of the first buffer groove (42). The interior of the second buffer groove (45) is provided with a block (43). The bottom of the block (43) is provided with a buffer rod (41). The buffer rod (41) is located inside the second buffer groove (45). The interior of the second buffer groove (45) is provided with a spring (44).

5. A synchronous permanent magnet motor according to claim 4, characterized in that, The positioning hole (11) is an interference fit with the fixing rod (15) and the positioning rod (34).

6. A synchronous permanent magnet motor according to claim 5, characterized in that, The positioning ring (3) has multiple first threaded grooves (9) on one side, and the stator sleeve (2) has multiple second threaded grooves (12) on one side.

7. A synchronous permanent magnet motor according to claim 6, characterized in that, The lower end of the fixed seat (5) is provided with a base (6), and a fixing bolt is provided between the base (6) and the fixed seat (5).

8. A synchronous permanent magnet motor according to claim 7, characterized in that, The card block (43) has a trapezoidal structure. Auxiliary blocks are provided on both sides of the card block (43). An auxiliary groove is provided on the inner wall of the first buffer groove (42). The auxiliary blocks and the auxiliary groove cooperate with each other.

9. A synchronous permanent magnet motor according to claim 8, characterized in that, The outer walls of the liquid guide tube (25) and the cooling tube (40) are provided with heat-insulating sleeves, which are made of polyurethane insulation material.

10. A synchronous permanent magnet motor according to claim 9, characterized in that, An adhesive pad is provided on the inner wall of the connecting groove (16).

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