Sliding-mode torque and flux control of an induction machine

Abstract

A sliding-mode control algorithm, based on differential geometry feedback linearisation control theory, is proposed to decouple the control of rotor flux magnitude and motor torque. The advantages of this method are that the generated torque becomes a linear output with respect to the control states, the rotor flux and the generated torque can be accurately controlled, and robustness with respect to matched and mismatched uncertainties is obtained. Additionally, a varying continuous control term is proposed, which eliminates chattering. Experimental results are presented to confirm the characteristics of the proposed control law.