A high torque density magnetic levitation motor

Abstract

The present invention discloses a high torque density magnetic levitation motor, comprising a casing, a rotor shaft and two magnetic levitation bearings, wherein the front end and the rear end of the casing are respectively provided with a front cover and a rear cover, wherein the rotor shaft is respectively coaxially rotatably connected to the interior of the front cover and the rear end cover through two magnetic levitation bearings, and a rotor assembly is installed inside the casing. The present invention can realize rapid disassembly and installation of the motor rotor by designing the rotor disk and the rotor shaft into a separate structure, and facilitates maintenance thereof, and can make the interior of the motor rotor hollow by arranging a support frame between the rotor disk and the connecting sleeve, and through such a design, the weight of the motor rotor is effectively reduced, and when the rotor is rotating, the response speed is improved, and the torque density of the magnetic levitation motor is improved at the same time.

Description

Technical Field

[0001] The invention relates to a magnetic levitation motor, in particular to a high torque density magnetic levitation motor, and belongs to the technical field of magnetic levitation 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 when working, thereby effectively increasing the rotor speed. The magnetic levitation high-speed motor avoids the friction of traditional mechanical bearings. The magnetic levitation technology can achieve long stroke and ultra-precision motion control accuracy.

[0003] Existing magnetic bearing systems suffer from relatively low torque density, which is mainly due to the following two key factors:

[0004] 1. The existing motor rotor is heavy: As a key component in the motor, the mass of the rotor directly affects the dynamic performance and efficiency of the entire system. The heavier rotor not only increases the overall inertia of the system, making the response speed slower, but also limits the torque density that the magnetic bearing can provide to a certain extent, because a larger mass requires a stronger magnetic force to stabilize the suspension and drive, thereby reducing the energy efficiency ratio of the overall system;

[0005] 2. In the prior art, in order to improve the heat dissipation effect, a heat dissipation fan is often used for heat dissipation. Although the heat dissipation fan can effectively accelerate the air flow and help dissipate the large amount of heat generated by electromagnetic action inside the generator, when the air is forced into the motor for heat dissipation, it will generate complex eddy currents in the internal structure of the motor, resulting in additional energy consumption, and will also disrupt the magnetic field distribution inside the motor, further affecting the operating efficiency and stability of the motor;

[0006] Therefore, a high torque density magnetic levitation motor is proposed. Summary of the invention

[0007] The object of the present invention is to provide a high torque density magnetic levitation motor to solve one of the problems raised in the above background technology.

[0008] The present invention is implemented by the following technical scheme: a high torque density magnetic suspension motor, comprising a housing, a rotor shaft and two magnetic suspension bearings, the front end and the rear end of the housing are respectively installed with a front cover and a rear cover, the rotor shaft is respectively coaxially rotatably connected to the inside of the front cover and the rear end cover through two magnetic suspension bearings, and a rotor assembly is installed inside the housing;

[0009] The rotor assembly includes a rotor disk, two limit disks, a flower sleeve, a mounting groove, a connecting sleeve and a support frame;

[0010] The mounting grooves are evenly arranged on the outer wall of the rotor disk, a magnetic steel is fixedly connected inside the mounting groove, the flower shaft sleeve is fixedly connected to the outer wall of the rotor shaft, the connecting shaft sleeve is located inside the rotor disk and is fixedly connected to the rotor disk through a support frame, the flower shaft sleeve is slidably connected to the inner wall of the connecting shaft sleeve, the two limiting plates are symmetrically slidably connected to the outer wall of the rotor shaft, the outer wall of the connecting shaft sleeve is symmetrically fixedly connected to two connecting seats, and the limiting plate is fixedly connected to the connecting seat by bolts.

[0011] As a further preferred embodiment of the technical solution: the outer side wall of the limit plate is symmetrically fixedly connected to the limit block, and the two ends of the rotor plate are symmetrically provided with limit grooves.

[0012] As a further preferred embodiment of the technical solution: the outer wall of the limit plate is slidably connected to the inner wall of the rotor plate, the outer wall of the limit block is slidably connected to the inner wall of the limit groove, and the outer wall of the limit plate is symmetrically provided with through grooves.

[0013] As a further preferred embodiment of the technical solution: a stator core is installed on the inner wall of the casing, a stator winding is wound inside the stator core, and the rotor disk is located inside the stator core.

[0014] As a further preferred embodiment of the technical solution: a heat dissipation assembly is installed at the rear of the rear end cover, and the heat dissipation assembly includes a protective cover, a fixed plate, a heat dissipation fan, a spring, a rotating shaft, an electromagnet and a sliding sleeve;

[0015] The protective cover is installed on the rear surface of the rear end cover, one end of the rotating shaft is rotatably connected to the rear surface of the rear end cover, the sliding sleeve is slidably connected to the outer wall of the rotating shaft, the cooling fan is installed on the outer wall of the sliding sleeve, the spring is sleeved on the outer wall of the rotating shaft, the electromagnet is installed on the front part of the outer wall of the rotating shaft, and the fixed plate is located inside the protective cover.

[0016] As a further preferred embodiment of the technical solution: the fixed disk is fixedly connected to the outer side wall of the rotor shaft, and the rotating shaft is sleeved on the outer side wall of the rotor shaft.

[0017] As a further preferred embodiment of the technical solution: one end of the spring presses against the sliding sleeve, the other end of the spring presses against the rotating shaft, and the front end of the sliding sleeve is attracted to the electromagnet.

[0018] As a further preferred embodiment of the technical solution: the sliding sleeve is coaxially arranged with the fixed disk and has corresponding positions, and the heat dissipation fan is located inside the protective cover.

[0019] As a further preferred embodiment of the present technical solution: heat dissipation holes are provided on the front surface of the front end cover and the rear surface of the rear end cover, and a temperature sensor is installed on the inner side wall of the rear end cover.

[0020] As a further preferred embodiment of the present technical solution: a mounting frame is fixedly connected to the outer side wall of the casing.

[0021] Advantages of the present invention:

[0022] 1. The present invention can realize the rapid disassembly and installation of the motor rotor by designing the rotor disk and the rotor shaft into a separate structure, which is convenient for maintenance. By arranging a support frame between the rotor disk and the connecting sleeve, the interior of the motor rotor can be hollowed out. Through this design, the weight of the motor rotor is effectively reduced. When the rotor is rotating, the response speed is improved, and the torque density of the magnetic suspension motor is improved;

[0023] 2. The present invention can monitor the temperature inside the motor in real time through the temperature sensor. When the temperature does not reach the rated value, the electromagnet adsorbs the sliding sleeve, the fixed disk and the sliding sleeve are separated, and the cooling fan is stationary. When the temperature reaches the rated value, the temperature sensor sends a signal to the motor control system, and the motor control system controls the electromagnet to cut off the power. At this time, under the push of the spring, the sliding sleeve and the fixed disk are fitted. Since the rotor shaft drives the fixed disk to rotate, the fixed disk drives the sliding sleeve to rotate, and the sliding sleeve drives the rotating shaft to rotate. When the sliding sleeve rotates, it drives the cooling fan, and negative pressure is formed at the cooling holes of the rear end cover. The air enters the casing, and then flows through the inside of the rotor and the gap between the rotor and the stator, and is finally discharged from the rear end cover, thereby realizing the heat dissipation of the motor. When the temperature is lower than the rated value, the electromagnet works and the cooling fan is stationary, thereby avoiding the generation of long-term eddy current phenomenon, reducing the consumption of additional energy, and ensuring the operation efficiency and stability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a high torque density magnetic levitation motor of the present invention;

[0026] Figure 2 It is a disassembly schematic diagram of a high torque density magnetic levitation motor of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the rotor assembly of the present invention;

[0028] Figure 4 It is a schematic diagram of disassembling the rotor assembly of the present invention;

[0029] Figure 5 It is a schematic diagram of the connecting sleeve structure of the present invention;

[0030] Figure 6 A schematic diagram of the installation position of the heat dissipation assembly of the present invention;

[0031] Figure 7 This is a schematic diagram of disassembling the heat dissipation assembly of the present invention;

[0032] Figure 8 It is a schematic diagram of the rear end cover structure of the present invention.

[0033] In the figure: 101, rotor assembly; 11, casing; 12, front cover; 13, rear cover; 14, rotor shaft; 15, magnetic bearing; 16, magnetic steel; 17, rotor disk; 18, limit plate; 19, through groove; 20, limit block; 22, flower shaft sleeve; 23, mounting groove; 24, connecting shaft sleeve; 25, support frame; 26, connecting seat; 27, limit groove; 28, stator winding; 29, stator core; 30, temperature sensor; 301, heat dissipation assembly; 31, protective cover; 32, fixed plate; 33, heat dissipation fan; 34, spring; 35, rotating shaft; 36, electromagnet; 37, sliding sleeve; 41, heat dissipation hole; 42, mounting frame. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in 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.

[0035] Example

[0036] In the prior art, the rotor is a key component in the motor, and its mass directly affects the dynamic performance and efficiency of the entire system. A heavier rotor not only increases the overall inertia of the system, making the response speed slower, but also limits the torque density that the magnetic bearing can provide to a certain extent, because a larger mass requires a stronger magnetic force for stable suspension and drive, thereby reducing the energy efficiency ratio of the overall system;

[0037] To do this, see Figure 1-Figure 5The present invention provides a technical solution: a high torque density magnetic suspension motor, comprising a housing 11, a rotor shaft 14 and two magnetic suspension bearings 15, the front end and the rear end of the housing 11 are respectively installed with a front cover 12 and a rear cover 13, the rotor shaft 14 is respectively connected to the inside of the front cover 12 and the rear cover 13 through the two magnetic suspension bearings 15 for coaxial rotation, the inner side wall of the housing 11 is installed with a stator core 29, the inside of the stator core 29 is wound with a stator winding 28, and the rotor disk 17 is located inside the stator core 29;

[0038] When the magnetic suspension motor is working, the stator winding 28 in the stator core 29 is powered, thereby driving the rotor assembly 101 to rotate, and the rotor shaft 14 rotates through the magnetic suspension bearing 15. By providing the magnetic suspension bearing 15, the rotor shaft 14 can be made to not generate mechanical friction when rotating, thereby increasing the speed of the rotor shaft 14. When rotating, the rotor shaft 14 drives the external load, thereby realizing the transmission of force.

[0039] A rotor assembly 101 is installed inside the housing 11;

[0040] The rotor assembly 101 includes a rotor disk 17, two limit disks 18, a flower sleeve 22, a mounting groove 23, a connecting sleeve 24 and a support frame 25;

[0041] The mounting grooves 23 are evenly arranged on the outer wall of the rotor disk 17, the interior of the mounting grooves 23 is fixedly connected with the magnetic steel 16, the flower shaft sleeve 22 is fixedly connected to the outer wall of the rotor shaft 14, the connecting shaft sleeve 24 is located inside the rotor disk 17 and is fixedly connected to the rotor disk 17 through the support frame 25, the flower shaft sleeve 22 is slidably connected to the inner wall of the connecting shaft sleeve 24, the two limiting plates 18 are symmetrically slidably connected to the outer wall of the rotor shaft 14, the outer wall of the connecting shaft sleeve 24 is symmetrically fixedly connected with two connecting seats 26, and the limiting plates 18 are fixedly connected to the connecting seats 26 by bolts;

[0042] By providing a support frame 25 to connect the rotor disk 17 and the connecting sleeve 24, the interior of the motor rotor is hollowed out, thereby reducing the weight of the motor rotor, improving the response speed of the rotor, and improving the torque density of the magnetic suspension motor. By providing the flower sleeve 22 and the connecting sleeve 24, the motor rotor can be quickly disassembled, which is convenient for maintenance and repair. By cooperating with the limit plate 18 and the connecting seat 26, the stability of the motor rotor can be enhanced.

[0043] The relationship between the weight of the motor rotor and the torque density is:

[0044]

[0045] Where T is the output torque of the motor;

[0046] is the mass of the rotor;

[0047] K1 is a constant that represents the basic efficiency of current and magnetic flux in generating torque;

[0048] I is the current in the motor;

[0049] Φ is the magnetic flux of the motor;

[0050] is a correction factor related to the rotor mass, used to consider the effect of mass change on torque density;

[0051] is a correction factor related to design parameters, including motor geometry, winding layout, and air gap size;

[0052] It is a temperature-dependent correction factor used to take into account the effect of temperature changes on motor performance;

[0053] It is a correction factor related to material properties, including the resistivity of conductors and the magnetic properties of permanent magnets;

[0054] The above formula can illustrate the relationship between torque density and rotor weight.

[0055] In this embodiment, specifically: the outer wall of the limit plate 18 is symmetrically fixedly connected to the limit block 20, the limit grooves 27 are symmetrically provided at both ends of the rotor disk 17, the outer wall of the limit plate 18 is slidably connected to the inner wall of the rotor disk 17, the outer wall of the limit block 20 is slidably connected to the inner wall of the limit groove 27, and the outer wall of the limit plate 18 is symmetrically provided with through grooves 19. Through the cooperation of the limit block 20 and the limit groove 27, the limit plate 18 can be firmly connected to the rotor disk 17, thereby ensuring the stability of the rotor structure, and the heat dissipation performance of the rotor can be increased by setting the through groove 19.

[0056] In order to solve the problems existing in the prior art, the embodiment of the present invention provides a high torque density magnetic levitation motor and solves the problems through the above technical solutions:

[0057] The present invention designs the rotor disk 17 and the rotor shaft 14 as a separate structure, which can realize the rapid disassembly and installation of the motor rotor, and facilitates the maintenance thereof. By arranging a support frame 25 between the rotor disk 17 and the connecting sleeve 24, the interior of the motor rotor can be hollowed out. Through this design, the weight of the motor rotor is effectively reduced. When the rotor is rotating, the response speed is improved, and the torque density of the magnetic levitation motor is improved.

[0058] In the prior art, in order to improve the heat dissipation effect, a heat dissipation fan is often used for heat dissipation: although the heat dissipation fan can effectively accelerate the air flow and help dissipate the large amount of heat generated by electromagnetic action inside the generator, when the air is forced into the motor for heat dissipation, it will generate complex eddy currents in the internal structure of the motor. These eddy currents not only increase the resistance of air flow, resulting in additional energy consumption, but also disrupt the magnetic field distribution inside the motor, further affecting the operating efficiency and stability of the motor;

[0059] To do this, see Figure 5-Figure 8 A heat dissipation assembly 301 is installed at the rear of the rear end cover 13, and the heat dissipation assembly 301 includes a protective cover 31, a fixing plate 32, a heat dissipation fan 33, a spring 34, a rotating shaft 35, an electromagnet 36 and a sliding sleeve 37;

[0060] The protective cover 31 is mounted on the rear surface of the rear end cover 13, one end of the rotating shaft 35 is rotatably connected to the rear surface of the rear end cover 13, the sliding sleeve 37 is slidably connected to the outer wall of the rotating shaft 35, the cooling fan 33 is mounted on the outer wall of the sliding sleeve 37, the spring 34 is sleeved on the outer wall of the rotating shaft 35, the electromagnet 36 is mounted on the front part of the outer wall of the rotating shaft 35, and the fixing plate 32 is located inside the protective cover 31;

[0061] The heat dissipation component 301 is used to achieve heat dissipation for the motor. When the internal temperature of the motor does not exceed the rated value, the rotor shaft 14 drives the fixed disk 32 to rotate, and the electromagnet 36 adsorbs the sliding sleeve 37. At this time, the spring 34 is compressed by force, and the fixed disk 32 is separated from the sliding sleeve 37. At this time, the position of the heat dissipation fan 33 is fixed. When the internal temperature of the motor reaches the rated value, the control system of the motor controls the electromagnet 36 to cut off the power. At this time, under the push of the spring 34, the sliding sleeve 37 is fitted with the fixed disk 32. Since the rotor shaft 14 drives the fixed disk 32 to rotate, the fixed disk 32 drives the sliding sleeve 37 to rotate, and the sliding sleeve 37 drives the rotating shaft 35 to rotate. When the sliding sleeve 37 rotates, it drives the heat dissipation fan 33, and then the heat dissipation of the motor can be achieved at this time.

[0062] In this embodiment, specifically: the fixed disk 32 is fixedly connected to the outer wall of the rotor shaft 14, the rotating shaft 35 is sleeved on the outer wall of the rotor shaft 14, one end of the spring 34 presses against the sliding sleeve 37, and the other end of the spring 34 presses against the rotating shaft 35, the front end of the sliding sleeve 37 is attracted by the electromagnet 36, at this time, the heat dissipation fan 33 is stationary, and no negative pressure heat dissipation operation is performed, and the opposite surfaces of the sliding sleeve 37 and the fixed disk 32 are provided with friction particles, which can enhance the friction between the sliding sleeve 37 and the fixed disk 32 when the heat dissipation operation is performed.

[0063] In this embodiment, specifically: the sliding sleeve 37 is coaxially arranged with the fixed plate 32 and their positions are corresponding, the heat dissipation fan 33 is located inside the protective cover 31, and the heat dissipation fan 33 can be protected by the protective cover 31 to avoid injuries caused by accidental touch by the staff.

[0064] In this embodiment, specifically: the front surface of the front cover 12 and the rear surface of the rear cover 13 are both provided with heat dissipation holes 41, and the inner wall of the rear cover 13 is installed with a temperature sensor 30, through which the temperature inside the motor can be monitored in real time. When the temperature does not reach the rated value, the heat dissipation fan 33 is stationary. When the temperature reaches the rated value, the temperature sensor 30 sends a signal to the motor control system, and the heat dissipation fan 33 performs heat dissipation operation;

[0065] The model of the temperature sensor 30 is: SHT30-DIS-B.

[0066] In this embodiment, specifically: the outer wall of the housing 11 is fixedly connected with a mounting bracket 42 , and the mounting bracket 42 is used to facilitate the mounting and fixing of the entire motor.

[0067] In order to solve the problems existing in the prior art, the embodiment of the present invention provides a high torque density magnetic levitation motor and solves the problems through the above technical solutions:

[0068] When the motor is working, the temperature inside the motor can be monitored in real time through the temperature sensor 30. When the temperature does not reach the rated value, the electromagnet 36 adsorbs the sliding sleeve 37, the fixed disk 32 is separated from the sliding sleeve 37, and the cooling fan 33 is stationary. When the temperature reaches the rated value, the temperature sensor 30 sends a signal to the motor control system, and the motor control system controls the electromagnet 36 to cut off the power. At this time, under the push of the spring 34, the sliding sleeve 37 is attached to the fixed disk 32. Since the rotor shaft 14 drives the fixed disk 32 to rotate, the fixed disk 32 drives the sliding sleeve 37 to rotate. The movable sleeve 37 rotates, and the sliding sleeve 37 drives the rotating shaft 35 to rotate. When the sliding sleeve 37 rotates, it drives the cooling fan 33, and negative pressure is formed at the cooling hole 41 of the rear end cover 13. The air enters the casing 11, and then flows through the inside of the rotor and the gap between the rotor and the stator, and is finally discharged from the rear end cover 13, thereby realizing the heat dissipation of the motor. When the temperature is lower than the rated value, the electromagnet 36 works and the cooling fan 33 stops, thereby avoiding the generation of long-term eddy current phenomenon, reducing the consumption of additional energy, and ensuring the operation efficiency and stability of the motor.

[0069] Working principle or structural principle, when in use, the stator winding 28 in the stator core 29 is powered, thereby driving the rotor assembly 101 to rotate, and the rotor shaft 14 rotates through the magnetic bearing 15. By setting the magnetic bearing 15, the rotor shaft 14 can be made to rotate without generating mechanical friction, thereby increasing the speed of the rotor shaft 14. The rotor shaft 14 drives the external load when rotating, thereby realizing force transmission. When the motor is working, the temperature inside the motor is monitored in real time through the temperature sensor 30. When the temperature does not reach the rated value, the electromagnet 36 adsorbs the sliding sleeve 37, the fixed plate 32 separates from the sliding sleeve 37, and the cooling fan 33 stops. When the temperature reaches the rated value, the temperature sensor 30 sends a signal to the motor control system, and the motor control system controls the electromagnet 36 to cut off the power. At this time, under the push of the spring 34, the sliding sleeve 37 fits with the fixed disk 32. The sliding sleeve 37 drives the cooling fan 33 when rotating, and forms a negative pressure at the cooling hole 41 of the rear end cover 13. The air enters the casing 11, and then flows through the inside of the rotor and the gap between the rotor and the stator, and finally is discharged from the rear end cover 13, thereby realizing the heat dissipation of the motor. When the temperature is lower than the rated value, the temperature sensor 30 sends a signal to the motor control system, and the motor control system controls the electromagnet 36 to work. The electromagnet 36 adsorbs the sliding sleeve 37, and the sliding sleeve 37 is separated from the fixed disk 32. At this time, the cooling fan 33 stops rotating.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high torque density magnetic levitation motor, characterized in that: The invention comprises a casing (11), a rotor shaft (14) and two magnetic suspension bearings (15); a front end cover (12) and a rear end cover (13) are respectively installed at the front end and the rear end of the casing (11); the rotor shaft (14) is coaxially rotatably connected to the interior of the front end cover (12) and the rear end cover (13) via the two magnetic suspension bearings (15); and a rotor assembly (101) is installed inside the casing (11); The rotor assembly (101) comprises a rotor disk (17), two limit disks (18), a flower shaft sleeve (22), a mounting groove (23), a connecting shaft sleeve (24) and a support frame (25); The mounting grooves (23) are evenly arranged on the outer wall of the rotor disk (17); a magnetic steel (16) is fixedly connected inside the mounting grooves (23); the flower shaft sleeve (22) is fixedly connected to the outer wall of the rotor shaft (14); the connecting shaft sleeve (24) is located inside the rotor disk (17) and is fixedly connected to the rotor disk (17) via a support frame (25); the flower shaft sleeve (22) is slidably connected to the inner wall of the connecting shaft sleeve (24); the two limiting plates (18) are symmetrically slidably connected to the outer wall of the rotor shaft (14); the outer wall of the connecting shaft sleeve (24) is symmetrically fixedly connected to two connecting seats (26); the limiting plate (18) is fixedly connected to the connecting seat (26) via bolts; A heat dissipation assembly (301) is installed at the rear of the rear end cover (13), and the heat dissipation assembly (301) comprises a protective cover (31), a fixing plate (32), a heat dissipation fan (33), a spring (34), a rotating shaft (35), an electromagnet (36) and a sliding sleeve (37); The protective cover (31) is mounted on the rear surface of the rear end cover (13); one end of the rotating shaft (35) is rotatably connected to the rear surface of the rear end cover (13); the sliding sleeve (37) is slidably connected to the outer wall of the rotating shaft (35); the cooling fan (33) is mounted on the outer wall of the sliding sleeve (37); the spring (34) is sleeved on the outer wall of the rotating shaft (35); the electromagnet (36) is mounted on the front part of the outer wall of the rotating shaft (35); and the fixing plate (32) is located inside the protective cover (31); The fixed disk (32) is fixedly connected to the outer wall of the rotor shaft (14), the rotating shaft (35) is sleeved on the outer wall of the rotor shaft (14), one end of the spring (34) presses against the sliding sleeve (37), the other end of the spring (34) presses against the rotating shaft (35), the front end of the sliding sleeve (37) is attracted by the electromagnet (36), the sliding sleeve (37) and the fixed disk (32) are coaxially arranged and have corresponding positions, and the heat dissipation fan (33) is located inside the protective cover (31).

2. A high torque density magnetic levitation motor according to claim 1, characterized in that: The outer side wall of the limiting disk (18) is symmetrically fixedly connected to the limiting block (20), and limiting grooves (27) are symmetrically provided at two ends of the rotor disk (17).

3. A high torque density magnetic levitation motor according to claim 2, characterized in that: The outer wall of the limiting plate (18) is slidably connected to the inner wall of the rotor plate (17), the outer wall of the limiting block (20) is slidably connected to the inner wall of the limiting groove (27), and the outer wall of the limiting plate (18) is symmetrically provided with through grooves (19).

4. The high torque density magnetic levitation motor according to claim 1, characterized in that: A stator core (29) is installed on the inner side wall of the casing (11), a stator winding (28) is wound inside the stator core (29), and the rotor disk (17) is located inside the stator core (29).

5. The high torque density magnetic levitation motor according to claim 1, characterized in that: The front surface of the front cover (12) and the rear surface of the rear cover (13) are both provided with heat dissipation holes (41), and the inner wall of the rear cover (13) is provided with a temperature sensor (30).

6. A high torque density magnetic levitation motor according to claim 4, characterized in that: The outer side wall of the casing (11) is fixedly connected with a mounting frame (42).

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