CN113472241B - Five-degree-of-freedom permanent magnet magnetic levitation motor - Google Patents
Five-degree-of-freedom permanent magnet magnetic levitation motor Download PDFInfo
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- CN113472241B CN113472241B CN202110817513.1A CN202110817513A CN113472241B CN 113472241 B CN113472241 B CN 113472241B CN 202110817513 A CN202110817513 A CN 202110817513A CN 113472241 B CN113472241 B CN 113472241B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Power Engineering (AREA)
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- Combustion & Propulsion (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to the technical field of magnetic levitation motors, and provides a five-degree-of-freedom permanent magnet magnetic levitation motor, which comprises: the motor comprises a motor body, a radial permanent magnet magnetic suspension bearing and a permanent magnet eddy current suspension device; a radial permanent magnet magnetic suspension bearing comprising: the first static magnetic ring, the first movable magnetic ring, the second static magnetic ring and the second movable magnetic ring; the first movable magnetic ring is arranged on the rotor shaft, a first static magnetic ring is sleeved on the outer side of the first movable magnetic ring, and the first static magnetic ring is arranged on the first end cover; the second movable magnetic ring is arranged on the rotor shaft, a second static magnetic ring is sleeved on the outer side of the second movable magnetic ring, and the second static magnetic ring is arranged on the second end cover; a permanent magnet eddy current levitation device comprising: two groups of permanent magnet eddy current suspension mechanisms are arranged at two ends or the same end of the rotor shaft; each group of permanent magnet eddy current suspension mechanism comprises: conductor rotor, conductor rotor base member, permanent magnet rotor base member and supporting mechanism. The invention can realize complete permanent magnet suspension with five degrees of freedom and improve the bearing capacity.
Description
Technical Field
The invention relates to the technical field of magnetic suspension motors, in particular to a five-degree-of-freedom permanent magnet magnetic suspension motor.
Background
The existing motor generally adopts a mechanical bearing, and has a series of problems of friction, serious abrasion, easy heating, low efficiency, pollution of lubricating oil to the environment and the like. If the non-contact magnetic suspension bearing is adopted, the friction loss of the rotor and the stator can be avoided, the maintenance cost can be reduced, and the service life of the motor can be greatly prolonged.
Magnetic bearings are generally classified into three types, active magnetic bearings (Active Magnetic Bearing, AMB), passive magnetic bearings (Passive Magnetic Bearing, PMB) and hybrid magnetic bearings (Hybrid Magnetic Bearing, HMB). The active magnetic suspension bearing and the hybrid magnetic suspension bearing both need a plurality of sensors, controllers and power amplifiers to detect and control the rotating shaft in real time so as to realize the high-precision control requirement of the rotating shaft, but the control system is complex, and the design and manufacturing cost is high.
The passive magnetic suspension bearing (PMB) does not need a complex control system required by AMB and HMB, has the advantages of simple mechanical structure, small volume, low loss and the like, and is the most potential magnetic suspension supporting technology at present. However, according to the Earnshaw theorem, the five-degree-of-freedom stable suspension cannot be realized by adopting the magnetic suspension motor with the PMB, so that at least one mechanical support bearing or electromagnetic support bearing is generally added into the magnetic suspension motor in addition to the protection bearing, and the purpose of stable suspension can be achieved. The magnetic suspension motor added with the mechanical bearing or the electromagnetic bearing has series problems of friction, abrasion or complex control system and the like, and cannot achieve the stable magnetic suspension motor under the ideal state.
Disclosure of Invention
The invention mainly solves the technical problems that the five-degree-of-freedom stable suspension cannot be realized by the magnetic suspension motor in the prior art, friction, abrasion or complex control system and the like exist in the magnetic suspension motor added with a mechanical bearing or an electromagnetic bearing, and provides the five-degree-of-freedom permanent magnet magnetic suspension motor so as to realize complete permanent magnet suspension with five degrees of freedom and improve the bearing capacity of the five-degree-of-freedom permanent magnet magnetic suspension motor.
The invention provides a five-degree-of-freedom permanent magnet magnetic levitation motor, which comprises: the motor comprises a motor body, a radial permanent magnet magnetic suspension bearing and a permanent magnet eddy current suspension device;
the motor body includes: the stator comprises a stator core, a stator winding, a first end cover, a second end cover, a rotor and a rotor shaft;
the rotor shaft is provided with a rotor, and a stator core is sleeved outside the rotor; stator windings are respectively arranged at two ends of the stator core; one side of the motor body is provided with a first end cover, and the other side of the motor body is provided with a second end cover;
the radial permanent magnet magnetic suspension bearing comprises: the first static magnetic ring, the first movable magnetic ring, the second static magnetic ring and the second movable magnetic ring;
the first movable magnetic ring is arranged on the rotor shaft, a first static magnetic ring is sleeved on the outer side of the first movable magnetic ring, and the first static magnetic ring is arranged on the first end cover; the second movable magnetic ring is arranged on the rotor shaft, a second static magnetic ring is sleeved on the outer side of the second movable magnetic ring, and the second static magnetic ring is arranged on the second end cover;
the permanent magnet eddy current suspension device comprises: two groups of permanent magnet eddy current suspension mechanisms are arranged at two ends or the same end of the rotor shaft;
each group of permanent magnet eddy current suspension mechanism comprises: the permanent magnet motor comprises a conductor rotor, a conductor rotor matrix, a permanent magnet rotor matrix and a supporting mechanism;
the conductor rotor matrix is arranged at the end part of the rotor shaft, and the conductor rotor is arranged on the conductor rotor matrix;
the permanent magnet rotor matrix is arranged on the supporting mechanism, and the permanent magnet rotor is arranged on the permanent magnet rotor matrix;
the conductor rotor and the permanent magnet rotor are arranged opposite to each other;
the permanent magnet rotor is provided with a plurality of permanent magnet blocks which are uniformly distributed in the circumferential direction, and the magnetizing directions of the magnetic poles of the adjacent permanent magnet blocks are opposite; the magnetization directions of the permanent magnet blocks are all axial magnetization;
when the two groups of permanent magnet eddy current suspension mechanisms are at the same end of the rotor shaft, the two groups of permanent magnet eddy current suspension mechanisms share the conductor rotor matrix.
Preferably, the first static magnetic ring, the first movable magnetic ring, the second static magnetic ring and the second movable magnetic ring are all axially magnetized.
Preferably, the supporting mechanism includes: the vertical plate, the protection bearing and the vertical plate extending shaft;
the vertical plate is provided with a vertical plate extension shaft, and the vertical plate extension shaft is connected with the end part of the rotor shaft through a protection bearing.
Preferably, the vertical plate is mounted on the bottom plate.
Preferably, the shape of the conductor rotor is a ring shape.
Preferably, the conductor rotor is made of a good conductor material or a diamagnetic material.
Preferably, the permanent magnet blocks of the permanent magnet rotor are all in a fan-shaped structure.
Preferably, an air gap is arranged between the first movable magnetic ring and the first static magnetic ring, and an air gap is arranged between the second movable magnetic ring and the second static magnetic ring.
Compared with the prior art, the five-degree-of-freedom permanent magnet magnetic suspension motor provided by the invention has the following advantages:
1. the invention can realize permanent magnet suspension with five degrees of freedom: the five degrees of freedom are not limited by electromagnetic bearings and mechanical bearings, and only a pair of mechanical protection bearings are needed at two ends when the rotor is stationary, so that complete permanent magnet suspension with five degrees of freedom can be realized; in addition, the five degrees of freedom of the invention are all limited by adopting permanent magnet suspension, so that the so-called gyroscopic effect, namely the deflection of the rotor shaft in the axial direction and the radial direction is small, and the phenomenon that the rotor rotates around the central shaft by a certain angle due to unbalanced stress can not occur.
2. The invention has the advantages of simple structure, high reliability, small volume, low power consumption, light weight and the like: the invention relates to full permanent magnet suspension; the magnetic suspension motor has the advantages that a huge active electromagnetic bearing is not needed, a hybrid magnetic bearing is not needed, and a complex control system needed by the existing electromagnetic bearing is not needed, so that the reliability is high, the whole size of the magnetic suspension motor body is small, the power consumption is low, and the bearing capacity of the magnetic suspension motor body is greatly improved.
3. The invention has better damping effect: when the motor rotor vibrates or vibrates in the axial direction, the conductor rotor and the permanent magnet rotor in the permanent magnet vortex suspension device generate vortex according to Lenz's law, the vortex can convert the vibration of the motor rotor shaft into heat energy to be consumed, and the vortex on the conductor rotor and the permanent magnet rotor is generated in real time along with the vibration or vibration of the motor rotor shaft, namely, the damping effect of the invention has real-time property and self-adaptability, thus having better damping effect.
In summary, the five-degree-of-freedom permanent magnet magnetic suspension motor provided by the invention (whether the permanent magnet is suspended from the permanent magnet or from the conductor disc) utilizes the inherent characteristic of the permanent magnet magnetic suspension. Compared with the existing five-degree-of-freedom magnetic suspension motor and magnetic suspension system, the invention has the advantages of simple electromechanical structure, small whole volume and low power consumption, can completely and thoroughly realize five-degree-of-freedom suspension of the permanent magnet, and omits the control system with the greatest technical difficulty and relatively most expensive cost in the existing active (or hybrid) magnetic suspension system; mechanical support bearings necessary for the existing passive suspension system are omitted, the technology is mature, and the price is relatively low.
Drawings
FIG. 1 is a cross-sectional view of a five degree of freedom permanent magnet magnetic levitation motor according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
fig. 4 is a cross-sectional view of a five-degree-of-freedom permanent magnet magnetic levitation motor according to the second embodiment of the present invention.
Reference numerals: I. the motor comprises a motor body, 1, a first vertical plate, 2, a first permanent magnet rotor matrix, 3, a first conductor rotor matrix, 4, a rotor shaft, 5, a load, 6, a first static magnetic ring, 7, a stator winding, 8, a stator core, 9, a second end cover, 10, a second conductor rotor matrix, 11, a second permanent magnet rotor matrix, 12, a second vertical plate, 13, a second vertical plate extension shaft, 14, a second protection bearing, 15, a second permanent magnet rotor, 16, a bottom plate, 17, a second conductor rotor, 18, a second movable magnetic ring, 19, a second static magnetic ring, 20, a rotor, 21, a first movable magnetic ring, 22, a first end cover, 23, a first conductor rotor, 24, a first permanent magnet rotor, 25, a first vertical plate extension shaft, 26 and a first protection bearing.
Detailed Description
In order to make the technical problems solved by the invention, the technical scheme adopted and the technical effects achieved clearer, the invention is further described in detail below with reference to the accompanying drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present invention are shown in the accompanying drawings.
Example 1
As shown in fig. 1, the five-degree-of-freedom permanent magnet magnetic levitation motor provided by the embodiment of the invention includes: the motor comprises a motor body I, a radial permanent magnet magnetic suspension bearing and a permanent magnet eddy current suspension device.
The motor body I includes: a stator core 8, stator windings 7, a first end cap 22, a second end cap 9, a rotor 20, and a rotor shaft 4; a rotor 20 is arranged on the rotor shaft 4, and a stator core 8 is sleeved outside the rotor 20; stator windings 7 are respectively arranged at two ends of the stator core 8; a first end cover 22 is arranged on one side of the motor body I, and a second end cover 9 is arranged on the other side of the motor body I. In this embodiment, the motor body I has no mechanical support bearings, i.e. no mechanical support bearings at the first end cap 22 and the second end cap 9.
The radial permanent magnet magnetic suspension bearing comprises: a first static magnetic ring 6, a first movable magnetic ring 21, a second static magnetic ring 19 and a second movable magnetic ring 18; the first movable magnetic ring 21 is arranged on the rotor shaft 4, a first static magnetic ring 6 is sleeved on the outer side of the first movable magnetic ring 21, and the first static magnetic ring 6 is arranged on the first end cover 22; the second movable magnetic ring 18 is arranged on the rotor shaft 4, a second static magnetic ring 19 is sleeved on the outer side of the second movable magnetic ring 18, and the second static magnetic ring 19 is arranged on the second end cover 9. An air gap is arranged between the first movable magnetic ring 21 and the first static magnetic ring 6, and an air gap is arranged between the second movable magnetic ring 18 and the second static magnetic ring 19. The first static magnetic ring 6, the first movable magnetic ring 21, the second static magnetic ring 19 and the second movable magnetic ring 18 are all axially magnetized. The assembled movable magnetic ring and static magnetic ring are coaxial and have no axial offset.
In this embodiment, the permanent magnet eddy current levitation device includes: two groups of permanent magnet eddy current suspension mechanisms, namely a first permanent magnet eddy current suspension mechanism and a second permanent magnet eddy current suspension mechanism, are arranged at two ends of the rotor shaft 4.
The first permanent magnet eddy current suspension mechanism comprises: a first conductor rotor 23, a first conductor rotor base 3, a first permanent magnet rotor 24, a first permanent magnet rotor base 2, and a first support mechanism. The first conductor rotor base body 3 is arranged at the end part of the rotor shaft 4, and the first conductor rotor 23 is arranged on the first conductor rotor base body 3; the first permanent magnet rotor base body 2 is arranged on the first supporting mechanism, and the first permanent magnet rotor 24 is arranged on the first permanent magnet rotor base body 2; the first conductor rotor 23 is arranged opposite to the first permanent magnet rotor 24.
The second permanent magnet eddy current suspension mechanism comprises: a second conductor rotor 17, a second conductor rotor base 10, a second permanent magnet rotor 15, a second permanent magnet rotor base 11, and a second support mechanism. The second conductor rotor base body 10 is arranged at the end part of the rotor shaft 4, and the second conductor rotor 17 is arranged on the second conductor rotor base body 10; the second permanent magnet rotor base 11 is arranged on the second supporting mechanism, and the second permanent magnet rotor 15 is arranged on the second permanent magnet rotor base 11; the second conductor rotor 17 is arranged opposite to the second permanent magnet rotor 15.
As shown in fig. 2 and 3, the first permanent magnet rotor 24 and the second permanent magnet rotor 15 have a plurality of permanent magnet blocks uniformly distributed in the circumferential direction, and the magnetic poles of adjacent permanent magnet blocks are magnetized in opposite directions; the permanent magnet blocks of the first permanent magnet rotor 24 and the second permanent magnet rotor 15 are all in a fan-shaped structure, and the magnetization directions are all axial magnetization.
The first conductor rotor 23 and the second conductor rotor 17 are annular in shape. The first conductor rotor 23 and the second conductor rotor 17 are both made of a good conductor material or a diamagnetic material.
Further, the first supporting mechanism includes: a first riser 1, a first protective bearing 26 and a first riser extension shaft 25; a first vertical plate extension shaft 25 is arranged on the first vertical plate 1, and a first permanent magnet rotor matrix 2 can be installed on the first vertical plate extension shaft 25; the first riser extension shaft 25 is connected to the end of the rotor shaft 4 by a first protective bearing 26.
The second support mechanism includes: a second riser 12, a second protective bearing 14 and a second riser extension shaft 13; a second vertical plate extension shaft 13 is arranged on the second vertical plate 12, and a second permanent magnet rotor matrix 11 can be installed on the second vertical plate extension shaft 13; the second riser extension shaft 13 is connected to the end of the rotor shaft 4 by a second protective bearing 14.
The first riser 1 and the second riser 12 are mounted on a base plate 16. The first riser extension shaft 25 and the second riser extension shaft 13 are coaxial with the rotor shaft 4.
The first and second protection bearings 26 and 14 support the magnetic levitation motor when it is stationary and protect the magnetic levitation motor when it is operating at fault.
In operation, the five degree of freedom permanent magnet magnetic levitation motor of the present embodiment is positioned with load 5 on rotor shaft 4 between first conductor rotor base 3 and first end cap 22 and proximate first end cap 22.
The invention provides a working principle of a five-degree-of-freedom permanent magnet magnetic suspension motor:
when three-phase alternating current is supplied to the stator winding 7 in the motor I, a rotating magnetic field for cutting the winding of the rotor 20 is generated, induced current is generated in the rotor winding, and the rotor shaft 4 in the motor I is driven to rotate, so that the first moving magnetic ring 21, the second moving magnetic ring 18, the first conductor rotor matrix 3, the second conductor rotor matrix 10, the first conductor rotor 23 and the second conductor rotor 17 are driven to rotate.
The radial permanent magnetic suspension bearing can be of a repulsive force type or a suction force type. The following takes a repulsive force type radial permanent magnetic suspension bearing as an example, and the working principle is briefly described: when the first moving magnetic ring 21 and the second moving magnetic ring 18 generate relative radial displacement to the first static magnetic ring 6 and the second static magnetic ring 19, the magnetic repulsive force generated by one side with the smaller radial air gap is increased, and the magnetic repulsive force generated by the other side is decreased, so that the first moving magnetic ring 21 and the second moving magnetic ring 18 generate magnetic force opposite to the relative radial displacement direction, and the magnetic force is restored to the radial balance position.
When the first conductor rotor 23, the second conductor rotor 17, the first conductor rotor matrix 3 and the second conductor rotor matrix 10 rotate, magnetic force lines generated by the first permanent magnet rotor 24 and the second permanent magnet rotor 15 are cut, induced currents are generated on the first conductor rotor 23 and the second conductor rotor 17, and an induced magnetic field is generated; since the first conductor rotor 23 and the second conductor rotor 17 have diamagnetism, the induced magnetic field generated by the first conductor rotor and the second conductor rotor is repulsive to the magnetic field of the first permanent magnet rotor 24 and the second permanent magnet rotor 15; when the magnetic levitation motor rotor shaft 4 is axially offset to the second direction, the air gap between the second conductor rotor 17 and the second permanent magnet rotor 15 is smaller than the air gap between the first conductor rotor 23 and the first permanent magnet rotor 24, and the magnetic repulsive force exerted by the second conductor rotor 17 is greater than the magnetic repulsive force exerted by the first conductor rotor 23, so that the rotor shaft 4 is subjected to a magnetic force directed to the first direction, and is restored to the axial equilibrium position. Conversely, when the magnetic levitation motor rotor shaft 4 is biased in the first axial direction, it will be subjected to a magnetic field force in the second direction, causing it to return to the axially balanced position.
When the rotor shaft 4 is stationary, i.e. the magnetic levitation motor is not started, the rotor shaft 4 is supported by two sets of radial permanent magnet magnetic levitation bearings, while the axial direction is supported by the mechanical first protection bearing 26 and the second protection bearing 14.
The five-degree-of-freedom permanent magnet magnetic suspension motor can realize permanent magnet suspension with five degrees of freedom. The earshaw theorem states that: the magnetic suspension system of the permanent magnet and the direct current coil combination at least needs to limit one degree of freedom to realize stable suspension. For the degree of freedom required to be limited, the existing five-degree-of-freedom magnetic suspension system mostly adopts an axial electromagnetic bearing or a mechanical bearing to limit the degree of freedom; the electromagnetic bearing has the defects of large volume, large power consumption, complex control system and low reliability; the mechanical bearings have the defects of low critical rotation speed and lubricating oil pollution; the invention does not need electromagnetic bearings and mechanical bearings in five degrees of freedom, and only needs a pair of mechanical protection bearings at two ends when the rotor is stationary, so that complete permanent magnet suspension with five degrees of freedom can be realized; in addition, the five degrees of freedom of the invention are all limited by adopting permanent magnet suspension, so that the so-called gyroscopic effect, namely the deflection of the rotor shaft in the axial direction and the radial direction is small, and the phenomenon that the rotor rotates around the central shaft by a certain angle due to unbalanced stress can not occur.
The invention relates to full permanent magnet suspension; the magnetic suspension motor has the advantages that a huge active electromagnetic bearing is not needed, a hybrid magnetic bearing is not needed, and a complex control system needed by the existing electromagnetic bearing is not needed, so that the reliability is high, the whole size of the magnetic suspension motor body is small, the power consumption is low, and the bearing capacity of the magnetic suspension motor body is greatly improved.
The existing permanent magnet suspension bearing is small in damping (or undamped), and an active damping coil is generally required to be added. When the motor rotor vibrates or vibrates in the axial direction or the radial direction, the conductor rotor and the permanent magnet rotor in the permanent magnet vortex suspension device generate vortex according to Lenz's law, the vortex can convert the vibration of the motor rotor shaft into heat energy to be consumed, and the vortex on the conductor rotor and the permanent magnet rotor is generated in real time along with the vibration or vibration of the motor rotor shaft, namely, the damping effect of the invention has real-time property and self-adaption, thus having better damping effect.
Example two
As shown in fig. 4, the five-degree-of-freedom permanent magnet magnetic levitation motor provided by the embodiment of the invention includes: the motor comprises a motor body I, a radial permanent magnet magnetic suspension bearing and a permanent magnet eddy current suspension device.
The motor body I and the radial permanent magnetic suspension bearing are the same as the first embodiment, and are different from the permanent magnetic eddy suspension device.
In this embodiment, the permanent magnet eddy current levitation device includes: the two groups of permanent magnet eddy current suspension mechanisms, namely a first permanent magnet eddy current suspension mechanism and a second permanent magnet eddy current suspension mechanism, which are arranged at the same end of the rotor shaft 4, can be integrated and placed at the tail part of the motor body I (namely the right end of the rotor shaft 4).
In this embodiment, two sets of permanent magnet eddy current levitation mechanisms are at the same end of the rotor shaft 4, and the two sets of permanent magnet eddy current levitation mechanisms share a conductor rotor matrix (the first conductor rotor matrix 3 and the second conductor rotor matrix 10 adopt the same conductor rotor matrix). Specifically, the first permanent magnet rotor base 2 and the first conductor rotor base 3 are disposed at the end of the rotor shaft 4, the first conductor rotor base 3 is located outside, and the second permanent magnet rotor base 11 is disposed on the second riser extension shaft 13.
In operation, the five degree of freedom permanent magnet magnetic levitation motor of the present embodiment is positioned with the load 5 on the rotor shaft 4 between the first riser 1 and the first end cap 22 and proximate to the first end cap 22.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments is modified or some or all of the technical features are replaced equivalently, so that the essence of the corresponding technical scheme does not deviate from the scope of the technical scheme of the embodiments of the present invention.
Claims (8)
1. A five degree of freedom permanent magnet magnetic levitation motor comprising: the motor comprises a motor body, a radial permanent magnet magnetic suspension bearing and a permanent magnet eddy current suspension device;
the motor body includes: a stator core (8), a stator winding (7), a first end cover (22), a second end cover (9), a rotor (20) and a rotor shaft (4);
a rotor (20) is arranged on the rotor shaft (4), and a stator core (8) is sleeved outside the rotor (20); stator windings (7) are respectively arranged at two ends of the stator core (8); a first end cover (22) is arranged on one side of the motor body, and a second end cover (9) is arranged on the other side of the motor body;
the radial permanent magnet magnetic suspension bearing comprises: the device comprises a first static magnetic ring (6), a first movable magnetic ring (21), a second static magnetic ring (19) and a second movable magnetic ring (18);
the first movable magnetic ring (21) is arranged on the rotor shaft (4), a first static magnetic ring (6) is sleeved on the outer side of the first movable magnetic ring (21), and the first static magnetic ring (6) is arranged on the first end cover (22); the second movable magnetic ring (18) is arranged on the rotor shaft (4), a second static magnetic ring (19) is sleeved on the outer side of the second movable magnetic ring (18), and the second static magnetic ring (19) is arranged on the second end cover (9);
the permanent magnet eddy current suspension device comprises: two groups of permanent magnet eddy current suspension mechanisms arranged at two ends or the same end of the rotor shaft (4);
each group of permanent magnet eddy current suspension mechanism comprises: the permanent magnet motor comprises a conductor rotor, a conductor rotor matrix, a permanent magnet rotor matrix and a supporting mechanism;
the conductor rotor matrix is arranged at the end part of the rotor shaft, and the conductor rotor is arranged on the conductor rotor matrix;
the permanent magnet rotor matrix is arranged on the supporting mechanism, and the permanent magnet rotor is arranged on the permanent magnet rotor matrix;
the conductor rotor and the permanent magnet rotor are arranged opposite to each other;
the permanent magnet rotor is provided with a plurality of permanent magnet blocks which are uniformly distributed in the circumferential direction, and the magnetizing directions of the magnetic poles of the adjacent permanent magnet blocks are opposite; the magnetization directions of the permanent magnet blocks are all axial magnetization;
when the two groups of permanent magnet eddy current suspension mechanisms are at the same end of the rotor shaft (4), the two groups of permanent magnet eddy current suspension mechanisms share the conductor rotor matrix.
2. The five-degree-of-freedom permanent magnet magnetic levitation motor of claim 1, wherein the first stationary magnetic ring (6), the first moving magnetic ring (21), the second stationary magnetic ring (19) and the second moving magnetic ring (18) are all axially magnetized.
3. The five degree of freedom permanent magnet magnetic levitation motor of claim 1 wherein the support mechanism comprises: the vertical plate, the protection bearing and the vertical plate extending shaft;
the vertical plate is provided with a vertical plate extension shaft, and the vertical plate extension shaft is connected with the end part of the rotor shaft through a protection bearing.
4. A five degree of freedom permanent magnet magnetic levitation motor according to claim 3, wherein the riser is mounted on the base plate (16).
5. The five degree-of-freedom permanent magnet magnetic levitation motor of claim 1 wherein the conductor rotor is in the shape of a circular ring.
6. A five degree of freedom permanent magnet magnetic levitation motor according to claim 1 or 5, wherein the conductor rotor is of good conductor material or diamagnetic material.
7. The five degree-of-freedom permanent magnet magnetic levitation motor of claim 1 wherein the permanent magnet pieces of the permanent magnet rotor are all of a fan-shaped configuration.
8. Five-degree-of-freedom permanent magnet magnetic levitation motor according to claim 1, characterized in that an air gap is provided between the first moving magnet ring (21) and the first stationary magnet ring (6), and an air gap is provided between the second moving magnet ring (18) and the second stationary magnet ring (19).
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| CN202110817513.1A CN113472241B (en) | 2021-07-19 | 2021-07-19 | Five-degree-of-freedom permanent magnet magnetic levitation motor |
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| CN202110817513.1A CN113472241B (en) | 2021-07-19 | 2021-07-19 | Five-degree-of-freedom permanent magnet magnetic levitation motor |
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| CN118572943A (en) * | 2024-07-31 | 2024-08-30 | 山东天瑞重工有限公司 | Electric suspension self-bearing motor for magnetic suspension rotation |
| CN118564559A (en) * | 2024-07-31 | 2024-08-30 | 山东天瑞重工有限公司 | Magnetic suspension rotary machine, magnetic suspension motor and control method |
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