Axial permanent-magnet bias hybrid magnetic bearing switch reluctance motor

Abstract

The invention provides an axial permanent-magnet bias hybrid magnetic bearing switch reluctance motor which comprises a torque stator, a torque rotor, a suspension force stator, a magnetic disc, a suspension force rotor, a permanent magnet, a non-magnetic stator, a non-magnetic rotor and windings, wherein the torque stator, the suspension force stator and the non-magnetic stator are axially superposed to form a whole; the non-magnetic stator is arranged between the torque stator and the suspension force stator; one winding is wound on each tooth combined by the three stators; the permanent magnet is placed between the suspension force stator and the magnetic disc, and axially magnetizes; the torque rotor, the suspension force rotor and the non-magnetic rotor are axially superposed together; the magnetic disc is in a disc structure or a salient pole structure same as the suspension force stator; the suspension force rotor is in a cylindrical structure; the number of teeth of the torque stator, the suspension force stator and the non-magnetic stator is twelve; pole arcs are equal; the number of teeth of the torque rotor and the non-magnetic rotor is eight; and pole arcs are equal. According to the motor, only the permanent magnet provides bias magnetic flux, and the motor is great in radial bearing capacity, few in power switching tube and low in control circuit cost.

Description

technical field [0001] The invention belongs to the technical field of motors, and relates to an axial permanent magnet bias hybrid magnetic bearing switched reluctance motor. Background technique [0002] The bearingless switched reluctance motor is a new type of magnetic levitation motor developed at the end of the 20th century. The double-winding bearingless switched reluctance motor is to stack the levitation winding that generates the levitation force and the winding of the original switched reluctance motor on the stator of the motor. By controlling the current of the two sets of windings, it has the ability to rotate and self-levitate simultaneously, so that Achieve ultra-high-speed operation of the motor. The single-winding bearingless switched reluctance motor has the ability to rotate and self-suspend at the same time by controlling the current of a set of windings. Therefore, the single-winding bearingless switched reluctance motor is more versatile and practica...

AI Technical Summary

Problems solved by technology

[0003] For a single-winding bearingless switched reluctance motor with a 12 / 8 structure, each phase needs to independently control the windings on the four stator teeth, that is, each phase needs a power conversion circuit composed of four bridge arms. Expand the demand for power devices, increase the complexity of suspension control and system cost, and reduce the reliability of the system

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