Position Sensor-less Control of Permanent Magnet Synchronous Motor Based on Integral Sliding Mode Observer Error Compensation

In permanent magnet synchronous motors (PMSM) without position sensors, information about rotor position changes is important. Aiming at the problem of inaccurate position signals caused by the phase delay of the integral sliding mode observer (SMO) estimation, a PMSM without position sensor control strategy based on error compensation is proposed. First, the position error generation mechanism of SMO is analyzed in detail, and a scheme is designed to improve the accuracy and effect of position estimation; an easy-to-implement segmented idempotent switching function is designed to exchange the traditional discontinuous function to suppress the jitter; and finally, simulations were performed on simulink to verify the feasibility of the scheme.