Improved Predictive Torque control of PMSM Considering Inductance Parameter Mismatch

Abstract

As for the tradition predictive torque control (T-PTC) algorithm in PMSM drive system, the time-varying electromagnetic parameters in the actual system, especially the inductance mismatch, cause a serious degradation in the control quality. To suppress the disturbance to the control system caused by inductance mismatch effectively, this paper proposes an improved robust predictive torque control (IR-PTC) algorithm without using the inductance parameter of the motor. In the proposed algorithm, the previous sampling information is selected to estimate the actual parameter, and the prediction model is established based on the time-derivatives (slopes) of torque and flux, which to improve the steady-state control performance under inductance mismatch. The feasibility and effectiveness of the proposed algorithm are verified by simulation and experimental results.