Three-degree-of-freedom magnetic suspension switch reluctance integrated motor

Abstract

The invention discloses a three-degree-of-freedom magnetic suspension switch reluctance integrated motor. According to the invention, a torque stator of the motor is isolated from a radial force stator and an axial force stator, so a torque magnetic circuit for generating torque is isolated from a bias magnetic circuit and suspension magnetic circuits for generating suspension force; due to the fact that the pole arc angle of each suspension stator tooth is equal to a rotor period angle, the radial suspension magnetic circuit does not generate torque, the axial suspension magnetic circuit and the torque magnetic circuit do not overlap, and no torque is generated; and in addition, the three-phase torque magnetic circuit is of a short magnetic circuit structure, phases are isolated from each other, and fault tolerance and reliability are high. According to the three-degree-of-freedom magnetic suspension switch reluctance integrated motor in the invention, a rotation function and a three-degree-of-freedom suspension function are integrated, the torque and three suspension forces are naturally decoupled structurally, axial length is short, the size and weight of the motor are reduced, iron core loss is small, and critical torque and power density are high; and bias magnetic flux can be generated by a permanent magnet excitation method, an electric excitation method and a mixed excitation method, and the three methods can be selected according to needs, so the motor is high in adaptability to application occasions and working conditions.

Description

technical field [0001] The invention relates to a three-degree-of-freedom magnetic levitation switch reluctance integrated motor, which belongs to the field of magnetic levitation motors. Background technique [0002] The switched reluctance motor has a simple structure, the stator and rotor are salient pole structures, the stator is wound with a concentrated winding, the rotor has no winding, no permanent magnet, good high-speed performance, strong fault tolerance, high temperature resistance and grease resistance, and strong environmental adaptability. It is widely used in aerospace, electric vehicles, flywheel energy storage, textile, petroleum, mining and other fields. Magnetic suspension bearings have the advantages of no contact, no friction, and easy maintenance. They can effectively solve the problem of bearing support for high-speed motors and are widely used in the field of motors. Integrating the magnetic levitation function into the switched reluctance motor con...

AI Technical Summary

Problems solved by technology

However, the bearingless switched reluctance motor can only achieve two-degree-of-freedom radial levitation operation. If a stable five-degree-of-freedom magnetic levitation motor system is to be formed, at least one axial magnetic levitation bearing is required to cooperate with the bearingless switched reluctance motor.

Furthermore, the axial length of the motor system increases, and the critical speed and power density decrease, which is not conducive to the ultra-high-speed and high-power operation of the motor

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