Speed regulation of induction motor using sliding mode control scheme

Abstract

This paper presents the design of a robust sliding mode controller for a vector control induction motor drive that employs an outer-loop speed controller using sliding mode strategy. In this scheme, the motor speed is controlled by a sliding mode controller. The methods of decoupling and torque linearization for the induction motor are derived from the field-orientation. Sliding mode control operation can typically reduce the dependence on accurate acquisition of motor parameters and improve the system robustness. With this controller, the dynamic and static performance of the system are studied. The controlled motor can response well to the change of speed and load. Even when drive inertia is not accurate acquired, this system also displays excellent quality. The new scheme is compared with the conventional approach using PI control. The availability of the proposed scheme is demonstrated by simulation and experiment results. Speed regulation of induction motor using sliding mode control scheme.