Dual-winding bearingless switched reluctance motor and control method thereof

Abstract

The invention discloses a dual-winding bearingless switched reluctance motor and a control method thereof. The motor comprises a stator having 12 tooth poles and a rotor having 4 tooth poles. The rotor has no winding. Main windings and auxiliary windings are wound on each stator tooth pole. The stator tooth poles of the same phase are separated by two stator tooth poles of other phase. The main windings of the stator tooth poles of the same phase are connected in series in turn. The auxiliary windings of each stator tooth pole and the auxiliary windings of the radially opposite stator tooth poles are reversely connected in series. Current of the main windings is unidirectionally conducted. Current of the auxiliary windings is bidirectionally conducted. Each rotor tooth pole is wider than the stator tooth pole for 30 degrees. Each phase of electric inductor has a maximum inductance flat area of 1 / 3 period so that decoupling of motor suspension force and torque on the mechanism of production is realized, the control algorithm is simplified, and more stable control of instantaneous suspension force can be realized.

Description

technical field [0001] The invention belongs to the technical field of a bearingless switched reluctance motor, and in particular relates to a double-winding bearingless switched reluctance motor and a control method thereof. Background technique [0002] Switched reluctance motor has the characteristics of simple structure, reliable operation, low cost, high temperature resistance, high fault tolerance and high speed adaptability, etc., and has been widely used in aerospace, military, civil and other fields. The bearingless switched reluctance motor (hereinafter referred to as BSRM), which integrates the functions of magnetic bearing and motor, realizes levitation operation while greatly reducing the volume and weight, and improving the power density. Due to the dual functions of rotation and suspension, the high-speed adaptability of BSRM is further improved, and it has better application advantages in aerospace and military fields. Compared with the single-winding struct...

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Problems solved by technology

In order to improve the operating performance of the motor, the required control algorithm is quite complex

In addition, when the motor speed rises to a certain level, due to the dual drive of the transformer potential and the motion potential, the excitation current will not decrease with the shutdown of the main switch tube, and the phenomenon of chopping failure will occur, thus affecting the real-time control of the levitation force In severe cases, it will lead to suspension instability of the bearingless motor

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