Feedback linearization sliding-mode torque control of an induction machine

In this work a high performance sliding-mode controller based on a feedback linearization control (SMC) system for PWM inverter-fed induction motor drives has been presented. The control performance under different operation conditions was compared to conventional field oriented control (RFO). The main features and advantages of the control system are summarised. It has been shown that both techniques can achieve high torque performance under certain operational conditions, and both have their particular advantages and disadvantages. The SMC scheme is disadvantaged due to the uncontrolled current transients and greater steady-state error. The RFO scheme is disadvantaged by greater parameter sensitivity and nonguaranteed decoupled control with transient flux dynamics. The selection of the controller will depend on the particular application.