PMSM Adaptive Sliding Mode Controller Based on Improved Linear Dead Time Compensation

Aiming at the issue of sliding mode observer (SMO) being sensitive to motor model parameters low speeds, a rotor position observation method based on resistance adaptive SMO and considering influence inverter dead time is designed in this paper. In method, online identification introduced into conventional SMO, are modified real-time, algorithm by using Lyapunov function. An enhanced linear compensation proposed improve eliminate voltage error between estimated actual models order address impact estimation speeds. Simulation results show that can significantly accuracy sensorless speed control also identification.