Adaptive state feedback backstepping controller for a permanent magnet synchronous motor

In order to make the controller adapt to the uncertainty and nonlinear of system, the paper proposes the control strategy of permanent magnet synchronous motor(PMSM) which is based on the adaptive state feedback and backstepping control. By derivation, the control scheme which is robust to the all parameter uncertainties and the load torque disturbance forces the whole control system to have the output strictly passivity. At the same time, proposed controller using a parameter dependant Lyapunov function has no singularity problem. The simulation results show that the control strategy can quickly adjust the speed and current under all parameter uncertainty and load disturbance.