Field orientation and adaptive backstepping for induction motor control

Based on a nonlinear model of induction motor containing both electrical and mechanical dynamics, an combined field orientation and adaptive backstepping approach is proposed in this paper for the control of induction motors. Rotor angular speed and rotor flux amplitude tracking objectives are formulated so that the speed regulation is achieved with the consideration of improving power efficiency. Parameter uncertainties of the rotor resistance and load torque disturbance are compensated using adaptive control techniques. Simulation results are provided to demonstrate the effectiveness of the proposed approach.