Axial flux five-degree-of-freedom magnetic levitation motor

Abstract

The invention discloses an axial flux five-degree-of-freedom magnetic levitation motor which comprises two bearingless switched reluctance motors, an axial disc, two permanent magnet rings and two sets of axial control windings. Rotors of the first bearingless switched reluctance motor and the second bearingless switched reluctance motor and the axial disc share one rotating shaft. The first bearingless switched reluctance motor and the second bearingless switched reluctance motor provide torque to drive the motors to rotate; radial suspension force is provided, and the radial four-degree-of-freedom suspension is guaranteed. The axial disc, the first permanent magnet ring, the second permanent magnet ring, a first stator tooth yoke, a second stator tooth yoke, a first rotor tooth yoke anda second rotor tooth yoke jointly form an axial bias magnetic flux, an axial control magnetic flux is generated by adjusting the first axial control winding and the second axial control winding, the axial suspension of the rotor is guaranteed, and finally the five-degree-of-freedom suspension of the system is achieved. According to the invention, the bearingless switched reluctance motors and an axial magnetic bearing are integrated, so that the high reliability and simplicity of a system can be embodied, and the advantages of no wear, long service life and the like of the magnetic bearing canbe exerted.

Description

technical field [0001] The invention relates to an axial magnetic flux five-degree-of-freedom magnetic levitation motor, which belongs to the technical field of magnetic levitation switched reluctance motors. Background technique [0002] In high-speed applications, the mechanical bearings used in the motor have high cost and short life, which seriously affect the performance of the motor. In order to solve this problem, the magnetic bearing technology was introduced, combined with the motor, to replace the traditional mechanical bearing, to realize the levitation operation of the motor rotor, which has the characteristics of no wear, long service life, and reduced maintenance costs. However, the use of magnetic bearings requires an additional independent rotor, which increases the size and cost of the system. At the same time, due to the increase in the length of the rotor, the critical speed decreases, which hinders the application of the motor system in high speed. Combi...

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Problems solved by technology

[0003] The bearingless switched reluctance motor integrates torque and radial suspension, which can provide both torque and radial suspension force, but cannot achieve axial stable suspension. Therefore, it is currently the research difficulties

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