A magnetically levitated motor with dynamic balance self-correction

Abstract

The present invention discloses a magnetic levitation motor with dynamic balance self-correction, which includes a machine shell, a motor shaft and two magnetic levitation bearings. A front end cover and a rear end cover are respectively installed at the front end and the rear end of the machine shell. The motor shaft is coaxially rotatably connected to the inside of the rear end cover and the front end cover through the two magnetic levitation bearings respectively. A correction component is installed inside the machine shell. In the present invention, the electric turntable drives the mounting plate to adjust the orientation of the magnetic steel, and the magnetic steel is adjusted to the swing point of the motor shaft. Then, the linear module drives the mounting seat, and the mounting seat drives the magnetic steel to adjust the distance between the magnetic steel and the magnetic ring. When the magnetic steel approaches the magnetic ring, the magnetic steel generates a thrust on the magnetic ring, and the motor shaft receives the corresponding thrust to adjust the position of the motor shaft. The motor shaft drives the rotor, and thus the force compensation for the rotor can be realized to achieve the dynamic balance correction of the rotor, enhancing the stability of the motor, improving the control precision of the motor, and reducing the energy loss.

Description

Technical Field

[0001] The invention relates to a magnetic suspension motor, in particular to a dynamically balanced self-correcting magnetic suspension motor, belonging to the technical field of magnetic suspension motors. Background Art

[0002] The magnetic levitation motor is a high-speed motor that uses magnetic levitation bearings to make the rotor free of mechanical friction during operation, thereby effectively increasing the rotor's speed. The magnetic levitation high-speed motor avoids the friction of traditional mechanical bearings. The magnetic levitation technology can achieve long strokes and ultra-precision motion control accuracy, meeting the accuracy requirements of modern processing and measurement equipment. Due to the reduced friction loss, the magnetic levitation motor has higher efficiency during operation and can save energy.

[0003] When the magnetic levitation motor is affected by external interference factors such as airflow and vibration, its rotor will have a certain degree of position shift or change, which will further have an adverse effect on the working state of the magnetic levitation motor:

[0004] Impact on motor stability: The rotor position deviation will destroy the balance state of the magnetic levitation motor, resulting in a decrease in motor stability. When running at high speed, this instability will cause vibration and noise, and in severe cases, it may even cause the motor to lose control or be damaged;

[0005] Reduced control accuracy: Magnetic levitation motors are usually used in situations that require high-precision control. The rotor position offset will directly affect the control accuracy of the motor, causing the actual operating state of the motor to deviate from the expected state, thereby affecting the quality and performance of the product;

[0006] Increased energy loss: The rotor position deviation will increase the energy loss of the magnetic levitation motor during operation. Due to the change in the gap between the rotor and the stator, the magnetic field is unevenly distributed, which in turn generates additional electromagnetic force, increasing the energy consumption of the motor;

[0007] Therefore, a dynamic balance self-correcting magnetic levitation motor is proposed. Summary of the invention

[0008] The object of the present invention is to provide a dynamically balanced self-correcting magnetic levitation motor to solve one of the problems raised in the above background technology.

[0009] The present invention is implemented by the following technical scheme: a dynamically balanced self-correcting magnetic suspension motor, comprising a housing, a motor shaft and two magnetic suspension bearings, the front end and the rear end of the housing are respectively provided with a front cover and a rear cover, the motor shaft is respectively coaxially rotatably connected to the inside of the rear cover and the front cover through two magnetic suspension bearings, and a correction component is installed inside the housing;

[0010] The calibration component includes a calibration base, a mounting ring, an electric turntable, a mounting plate, a linear module, a support rod, a mounting seat, and a magnet;

[0011] The outer side wall of the calibration base is attached to the inner side wall of the casing. The mounting ring is fixedly connected to the inner side wall of the calibration base. The electric turntable is installed on the rear surface of the mounting ring. The mounting plate is installed on the rotor of the electric turntable. The linear module is installed on the rear surface of the mounting plate. The top end of the support rod is fixedly connected to the rotor of the linear module. The bottom end of the support rod is fixedly connected to the upper surface of the mounting seat. The magnet is embedded in the lower surface of the mounting seat.

[0012] As a further preference of this technical solution: A magnetic ring is installed on the outer side wall of the motor shaft. The linear module is perpendicular to the axis of the motor shaft. The position of the magnetic ring corresponds to the position of the magnet.

[0013] As a further preference of this technical solution: The calibration component further includes a detection seat, a spring, a displacement sensor, a sliding column, a limit seat, and a contact wheel;

[0014] The limit seat is fixedly connected to the outer side wall of the sliding column. The sliding column and the limit seat are both slidably connected to the inner side wall of the detection seat. One end of the displacement sensor is installed on the inner top wall of the detection seat. The other end of the displacement sensor is installed on the top end of the sliding column. The contact wheel is installed on the bottom end of the sliding column. The spring is sleeved on the outer side wall of the sliding column.

[0015] As a further preference of this technical solution: One end of the spring abuts against the upper surface of the limit seat. The other end of the spring abuts against the inner top wall of the detection seat. The spring is sleeved outside the displacement sensor. The detection seat is installed on the inner side wall of the calibration base.

[0016] As a further preference of this technical solution: A contact ring is installed on the outer side wall of the motor shaft. The sliding column is perpendicular to the axis of the motor shaft. The outer side wall of the contact wheel is attached to the outer side wall of the contact ring.

[0017] As a further preference of this technical solution: A retaining ring and a limit strip are fixedly connected to the inner side wall of the casing. The rear surface of the calibration base is attached to the front surface of the retaining ring. Limit grooves are evenly formed on the outer side wall of the calibration base. The limit strip is slidably connected to the inner side wall of the limit groove.

[0018] As a further preference of this technical solution: Positioning holes are symmetrically formed on the rear surface of the front end cover. Positioning columns are symmetrically and fixedly connected to the front surface of the calibration base. The positioning columns are slidably connected to the inner side wall of the positioning holes. The front end cover is attached to the front surface of the calibration base.

[0019] As a further preference of this technical solution: a stator core is installed on the inner side wall of the casing, a stator winding is wound inside the stator core, a rotor is installed on the outer side wall of the motor shaft, and the rotor is located inside the stator core.

[0020] As a further preference of this technical solution: a radiator fan is fixedly connected to the outer side wall of the motor shaft, the radiator fan is located behind the rear end cover, a protective ring is fixedly connected to the rear surface of the rear end cover, the radiator fan is located inside the protective ring, and a protective net is fixedly connected to the rear surface of the protective ring.

[0021] As a further preference of this technical solution: air holes are provided inside both the front end cover and the rear end cover.

[0022] Advantages of the present invention:

[0023] 1. The present invention can monitor the position of the rotor through the correction component. When the rotor is affected by an external disturbing force, the rotor and the motor shaft generate a position offset. When the motor shaft rotates, it will swing to a certain extent. When the motor shaft swings, it pushes the contact wheel, and the contact wheel pushes the displacement sensor through the sliding column. The displacement sensor generates a numerical change, thereby indicating that the position of the rotor has shifted at this time, realizing real-time monitoring of the rotor position.

[0024] 2. The present invention drives the mounting plate through the electric turntable, and the mounting plate drives the mounting seat through the support rod to adjust the orientation of the magnetic steel. The magnetic steel is adjusted to the swing point of the motor shaft, and then the mounting seat is driven by the linear module. The mounting seat drives the magnetic steel to adjust the distance between the magnetic steel and the magnetic ring. When the magnetic steel approaches the magnetic ring, the magnetic steel generates a thrust on the magnetic ring, and the motor shaft receives the corresponding thrust to adjust the position of the motor shaft. The motor shaft drives the rotor, and thus the force compensation for the rotor can be realized to achieve the dynamic balance correction of the rotor, enhancing the stability of the motor, improving the control accuracy of the motor, and reducing the energy loss. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of a magnetic levitation motor with dynamic balance self-correction of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the correction component of the present invention;

[0028] Figure 3 Schematic diagram of the connection between the permanent magnet and the mounting seat of the present invention;

[0029] Figure 4 Schematic diagram of the structure of the detection seat of the present invention;

[0030] Figure 5 Schematic diagram of the installation position of the retaining ring of the present invention;

[0031] Figure 6 Disassembly schematic diagram of the present invention;

[0032] Figure 7 Schematic diagram of the structure of the front end cover of the present invention;

[0033] Figure 8 Schematic diagram of the structure of the rear end cover of the present invention.

[0034] In the figure: 101, calibration component; 11, calibration seat; 12, limit groove; 13, positioning post; 14, mounting ring; 15, electric turntable; 16, mounting plate; 17, detection seat; 18, linear module; 19, support rod; 20, mounting seat; 21, permanent magnet; 22, spring; 23, displacement sensor; 24, sliding column; 25, limit seat; 26, contact wheel; 31, housing; 32, front end cover; 33, motor shaft; 34, magnetic suspension bearing; 35, rear end cover; 36, retaining ring; 37, magnetic ring; 38, limit strip; 39, contact ring; 40, rotor; 41, stator core; 42, stator winding; 43, protective ring; 44, cooling fan; 45, protective net; 46, positioning hole; 47, air hole. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment

[0037] In the prior art, when a magnetic suspension motor is affected by external interference factors such as air flow and vibration, the rotor thereof will undergo a certain degree of position offset or change, and this offset or change will further have an adverse impact on the working state of the magnetic suspension motor;

[0038] To this end, please refer to Figures 1-8, the present invention provides a technical solution: a magnetic levitation motor with dynamic balance self-correction, which includes a machine housing 31, a motor shaft 33 and two magnetic levitation bearings 34. A front end cover 32 and a rear end cover 35 are respectively installed at the front end and the rear end of the machine housing 31. The motor shaft 33 is coaxially rotatably connected to the inside of the rear end cover 35 and the front end cover 32 through the two magnetic levitation bearings 34. A stator core 41 is installed on the inner side wall of the machine housing 31, and a stator winding 42 is wound inside the stator core 41. A rotor 40 is installed on the outer side wall of the motor shaft 33, and the rotor 40 is located inside the stator core 41;

[0039] When the magnetic levitation motor is working, power is supplied to the stator winding 42 in the stator core 41, thereby driving the rotor 40 to rotate. The rotor 40 drives the motor shaft 33, and the motor shaft 33 rotates through the magnetic levitation bearings 34. By setting the magnetic levitation bearings 34, mechanical friction will not be generated when the motor shaft 33 rotates, thereby the rotation speed of the motor shaft 33 can be increased. When the motor shaft 33 rotates, it drives an external load, thereby the transmission of force can be achieved;

[0040] A correction assembly 101 is installed inside the machine housing 31;

[0041] The correction assembly 101 includes a correction seat 11, an installation ring 14, an electric turntable 15, an installation plate 16, a linear module 18, a support rod 19, an installation seat 20 and a magnetic steel 21;

[0042] The outer side wall of the correction seat 11 is attached to the inner side wall of the machine housing 31. The installation ring 14 is fixedly connected to the inner side wall of the correction seat 11. The electric turntable 15 is installed on the rear surface of the installation ring 14. The installation plate 16 is installed on the mover of the electric turntable 15. The linear module 18 is installed on the rear surface of the installation plate 16. The top end of the support rod 19 is fixedly connected to the mover of the linear module 18. The bottom end of the support rod 19 is fixedly connected to the upper surface of the installation seat 20. The magnetic steel 21 is embedded in the lower surface of the installation seat 20. A magnetic ring 37 is installed on the outer side wall of the motor shaft 33. The linear module 18 is perpendicular to the axis of the motor shaft 33, and the position of the magnetic ring 37 corresponds to the position of the magnetic steel 21;

[0043] The correction assembly 101 is used to realize the position correction of the rotor 40. When working, the electric turntable 15 drives the installation plate 16, and the installation plate 16 drives the installation seat 20 through the support rod 19, thereby the orientation of the magnetic steel 21 can be adjusted. The linear module 18 drives the installation seat 20, and the installation seat 20 drives the magnetic steel 21, so that the distance between the magnetic steel 21 and the magnetic ring 37 can be adjusted. When the magnetic steel 21 approaches the magnetic ring 37, the magnetic steel 21 generates a thrust on the magnetic ring 37, thereby generating a corresponding thrust on the motor shaft 33 to adjust the position of the motor shaft 33. The motor shaft 33 drives the rotor 40, thereby the force compensation for the rotor 40 can be realized to perform dynamic balance correction on the rotor 40.

[0044] In this embodiment, specifically, the calibration component 101 further includes a detection seat 17, a spring 22, a displacement sensor 23, a sliding column 24, a limit seat 25, and a contact wheel 26;

[0045] The limit seat 25 is fixedly connected to the outer sidewall of the sliding column 24. Both the sliding column 24 and the limit seat 25 are slidably connected to the inner sidewall of the detection seat 17. One end of the displacement sensor 23 is installed on the inner top wall of the detection seat 17, and the other end of the displacement sensor 23 is installed on the top end of the sliding column 24. The contact wheel 26 is installed at the bottom end of the sliding column 24. The spring 22 is sleeved on the outer sidewall of the sliding column 24. One end of the spring 22 abuts against the upper surface of the limit seat 25, and the other end of the spring 22 abuts against the inner top wall of the detection seat 17. The spring 22 is sleeved outside the displacement sensor 23. The detection seat 17 is installed on the inner sidewall of the calibration seat 11;

[0046] The calibration component 101 can also be used to monitor the position of the rotor 40;

[0047] When the rotor 40 is affected by an external disturbing force, both the rotor 40 and the motor shaft 33 will have a position offset. As a result, the axis of the motor shaft 33 will be offset from the axis of the calibration seat 11, and the motor shaft 33 will swing to a certain extent during rotation. When the motor shaft 33 swings, it pushes the contact wheel 26, and the contact wheel 26 pushes the displacement sensor 23 through the sliding column 24, causing a numerical change in the displacement sensor 23, thereby indicating that the position of the rotor 40 has shifted at this time, realizing the monitoring of the position of the rotor 40;

[0048] The model of the displacement sensor 23 is: KTC2.

[0049] In this embodiment, specifically, a contact ring 39 is installed on the outer sidewall of the motor shaft 33. The sliding column 24 is perpendicular to the axis of the motor shaft 33, and the outer sidewall of the contact wheel 26 is attached to the outer sidewall of the contact ring 39. By contacting the contact ring 39 with the contact wheel 26, the friction generated on the motor shaft 33 can be reduced, ensuring the service life of the motor shaft 33.

[0050] To solve the problems existing in the prior art, the embodiment of the present invention provides a magnetic levitation motor with dynamic balance self-calibration and solves the problems through the above technical solutions:

[0051] When the rotor 40 is affected by an external disturbing force, the rotor 40 and the motor shaft 33 generate a position offset. When the motor shaft 33 rotates, it will generate a certain amplitude of swing. When the motor shaft 33 swings, it pushes the contact wheel 26. The contact wheel 26 pushes the displacement sensor 23 through the sliding column 24. The displacement sensor 23 generates a numerical change, thereby indicating that the position of the rotor 40 is offset at this time. The electric turntable 15 drives the mounting plate 16, and the mounting plate 16 drives the mounting seat 20 through the support rod 19, so as to adjust the orientation of the permanent magnet 21. The permanent magnet 21 is adjusted to the swing point of the motor shaft 33. Then, the linear module 18 drives the mounting seat 20, and the mounting seat 20 drives the permanent magnet 21 to adjust the distance between the permanent magnet 21 and the magnetic ring 37. When the permanent magnet 21 approaches the magnetic ring 37, the permanent magnet 21 generates a thrust on the magnetic ring 37, and the motor shaft 33 receives the corresponding thrust to adjust the position of the motor shaft 33. The motor shaft 33 drives the rotor 40, thereby realizing the force compensation for the rotor 40 to perform dynamic balance correction on the rotor 40.

[0052] In this embodiment, specifically: a retaining ring 36 and a limiting strip 38 are fixedly connected to the inner side wall of the housing 31. The rear surface of the calibration seat 11 is attached to the front surface of the retaining ring 36. Limiting grooves 12 are evenly formed on the outer side wall of the calibration seat 11. The limiting strip 38 is slidably connected to the inner side wall of the limiting groove 12. The front and rear positions of the calibration seat 11 can be limited by the retaining ring 36, and the axial position of the calibration seat 11 can be limited through the cooperation of the limiting groove 12 and the limiting strip 38, thereby enhancing the stability of the calibration seat 11.

[0053] In this embodiment, specifically: positioning holes 46 are symmetrically formed on the rear surface of the front end cover 32. Positioning columns 13 are symmetrically and fixedly connected to the front surface of the calibration seat 11. The positioning columns 13 are slidably connected to the inner side wall of the positioning holes 46. The front end cover 32 is attached to the front surface of the calibration seat 11. The calibration seat 11 can be limited by the positioning columns 13 and the positioning holes 46. When the front end cover 32 is installed with the housing 31, the position of the calibration seat 11 is fixed. The calibration seat 11 has a detachable design, which simplifies the disassembly and maintenance steps and facilitates the operation.

[0054] In this embodiment, specifically: a cooling fan 44 is fixedly connected to the outer side wall of the motor shaft 33. The cooling fan 44 is located behind the rear end cover 35. A protective ring 43 is fixedly connected to the rear surface of the rear end cover 35. The cooling fan 44 is located inside the protective ring 43. A protective net 45 is fixedly connected to the rear surface of the protective ring 43. The cooling fan 44 can be shielded by the protective ring 43 and the protective net 45 to prevent the staff from accidentally touching the cooling fan 44 and causing personal injury.

[0055] In this embodiment, specifically: air holes 47 are provided inside the front end cover 32 and the rear end cover 35. When the motor shaft 33 rotates at a high speed, the motor shaft 33 drives the radiator fan 44 to rotate, thereby creating a negative pressure behind the rear end cover 35. At this time, external air flows into the housing 31 through the air holes 47 of the front end cover 32, and then flows out of the housing 31 through the air holes 47 of the rear end cover 35. During the air flow, the heat inside the housing 31 is discharged, thereby realizing the heat dissipation of the magnetic levitation motor.

[0056] Working principle or structural principle. During use, power is supplied to the stator winding 42 in the stator core 41, thereby driving the rotor 40 to rotate. The rotor 40 drives the motor shaft 33, and the motor shaft 33 rotates through the magnetic levitation bearing 34. By setting the magnetic levitation bearing 34, mechanical friction will not be generated when the motor shaft 33 rotates, thereby increasing the rotation speed of the motor shaft 33. When the motor shaft 33 rotates, it drives an external load, realizing the transmission of force. When the motor shaft 33 rotates at a high speed, it drives the radiator fan 44 to rotate, creating a negative pressure behind the rear end cover 35. At this time, external air flows into the housing 31 through the air holes 47 of the front end cover 32, and then flows out of the housing 31 through the air holes 47 of the rear end cover 35. During the air flow, the heat inside the housing 31 is discharged, realizing the heat dissipation of the magnetic levitation motor.

[0057] When the motor shaft 33 is affected by an external interference force, the rotor 40 and the motor shaft 33 generate a position offset, and the motor shaft 33 will swing to a certain extent during rotation. When the motor shaft 33 swings, it pushes the contact wheel 26, and the contact wheel 26 pushes the displacement sensor 23 through the sliding column 24. The displacement sensor 23 generates a numerical change, indicating that the position of the rotor 40 has shifted at this time. By driving the mounting plate 16 through the electric turntable 15, the mounting plate 16 drives the mounting seat 20 through the support rod 19, and the orientation of the magnet 21 can be adjusted. The magnet 21 is adjusted to the swing point of the motor shaft 33, and then the mounting seat 20 is driven by the linear module 18. The mounting seat 20 drives the magnet 21 to adjust the distance between the magnet 21 and the magnetic ring 37. When the magnet 21 approaches the magnetic ring 37, the magnet 21 generates a thrust on the magnetic ring 37, and the motor shaft 33 receives a corresponding thrust to adjust the position of the motor shaft 33. The motor shaft 33 drives the rotor 40, thereby realizing the force compensation for the rotor 40 to perform dynamic balance correction on the rotor 40.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetic levitation motor with dynamic balance self-correction, characterized in that, It includes a housing (31), a motor shaft (33), and two magnetic levitation bearings (34). A front end cover (32) and a rear end cover (35) are respectively installed at the front end and the rear end of the housing (31). The motor shaft (33) is coaxially rotatably connected to the inside of the rear end cover (35) and the front end cover (32) through the two magnetic levitation bearings (34). A calibration component (101) is installed inside the housing (31); The calibration component (101) includes a calibration seat (11), an installation ring (14), an electric rotary table (15), an installation plate (16), a linear module (18), a support rod (19), an installation seat (20), and a permanent magnet (21); The outer side wall of the calibration seat (11) is attached to the inner side wall of the housing (31). The installation ring (14) is fixedly connected to the inner side wall of the calibration seat (11). The electric rotary table (15) is installed on the rear surface of the installation ring (14). The installation plate (16) is installed on the mover of the electric rotary table (15). The linear module (18) is installed on the rear surface of the installation plate (16). The top end of the support rod (19) is fixedly connected to the mover of the linear module (18). The bottom end of the support rod (19) is fixedly connected to the upper surface of the installation seat (20). The permanent magnet (21) is embedded in the lower surface of the installation seat (20); The calibration component (101) further includes a detection seat (17), a spring (22), a displacement sensor (23), a sliding column (24), a limit seat (25), and a contact wheel (26); The limit seat (25) is fixedly connected to the outer side wall of the sliding column (24). The sliding column (24) and the limit seat (25) are both slidably connected to the inner side wall of the detection seat (17). One end of the displacement sensor (23) is installed on the inner top wall of the detection seat (17). The other end of the displacement sensor (23) is installed on the top end of the sliding column (24). The contact wheel (26) is installed on the bottom end of the sliding column (24). The spring (22) is sleeved on the outer side wall of the sliding column (24); One end of the spring (22) abuts against the upper surface of the limit seat (25). The other end of the spring (22) abuts against the inner top wall of the detection seat (17). The spring (22) is sleeved outside the displacement sensor (23). The detection seat (17) is installed on the inner side wall of the calibration seat (11); A contact ring (39) is installed on the outer side wall of the motor shaft (33). The sliding column (24) is perpendicular to the axis of the motor shaft (33). The outer side wall of the contact wheel (26) is attached to the outer side wall of the contact ring (39).

2. A magnetic levitation motor with dynamic balance self-correction according to claim 1, characterized in that A magnetic ring (37) is installed on the outer side wall of the motor shaft (33). The linear module (18) is perpendicular to the axis of the motor shaft (33). The position of the magnetic ring (37) corresponds to the position of the permanent magnet (21).

3. A magnetic levitation motor with dynamic balance self-correction according to claim 1, characterized in that A retaining ring (36) and a limiting strip (38) are fixedly connected to the inner side wall of the housing (31). The rear surface of the calibration seat (11) is attached to the front surface of the retaining ring (36). Limiting grooves (12) are evenly formed in the outer side wall of the calibration seat (11), and the limiting strip (38) is slidably connected to the inner side wall of the limiting groove (12).

4. A magnetic levitation motor with dynamic balance self-correction according to claim 3, characterized in that, Positioning holes (46) are symmetrically formed in the rear surface of the front end cover (32). Positioning columns (13) are symmetrically and fixedly connected to the front surface of the calibration seat (11). The positioning columns (13) are slidably connected to the inner side wall of the positioning holes (46), and the front end cover (32) is attached to the front surface of the calibration seat (11).

5. A magnetic levitation motor with dynamic balance self-correction according to claim 3, characterized in that, A stator core (41) is installed on the inner side wall of the housing (31). A stator winding (42) is wound inside the stator core (41). A rotor (40) is installed on the outer side wall of the motor shaft (33), and the rotor (40) is located inside the stator core (41).

6. A magnetic levitation motor with dynamic balance self-correction according to claim 5, characterized in that, A heat dissipation fan (44) is fixedly connected to the outer side wall of the motor shaft (33). The heat dissipation fan (44) is located behind the rear end cover (35). A protective ring (43) is fixedly connected to the rear surface of the rear end cover (35). The heat dissipation fan (44) is located inside the protective ring (43). A protective net (45) is fixedly connected to the rear surface of the protective ring (43).

7. A magnetically levitated motor with dynamic balance self-correction according to claim 6, characterized in that, Air holes (47) are formed inside both the front end cover (32) and the rear end cover (35).

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