Abstract

In order to avoid the limitation of the mechanical sensors in bearingless switched reluctance motors (BSRMs), a new method to observe rotor angle position and radial displacement at the same time is proposed in this paper, which simplifies motor's hardware system with high-integrated control algorithm. In this method, the position and displacement are estimated by processing the self-inductance of main winding and the mutual-inductance between main winding and levitation winding, which are both obtained by injecting High-Frequency Pulse into the main winding. For feasibility assessment of this method, the mathematical model of self-inductance and mutual-inductance in BSRM is presented and analysed by the Finite Element Method (FEM). After that, the proposed control strategy is implemented and verified by MATLAB/Simulink and ANSOFT/Maxwell.

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