Model reference adaptive backstepping control of permanent magnet synchronous motors

Based on the model of permanent magnet synchronous motors (PMSM) in field-oriented coordinates, a model reference adaptive backstepping control method of PMSM is proposed. A linear reference model is used to give the performance specification of the control system. Then, by defining the virtual control and selecting the proper Lyapunov function, the stability of the drive system can be guaranteed. The control law and parameter updating law-are derived step by step. The system can asymptotically track the rotor speed and flux reference signals generated by the reference model under parameter uncertainties and load torque disturbance. Simulation results illustrate the effectiveness of the proposed approach.