A Feedback Linearization Control Scheme Based on Direct Torque Control for Permanent Magnet Synchronous Motor

In order to reduce the large ripple of controlled motor's torque in the traditional direct torque control(DTC), a feedback linearization control scheme based on direct torque control for permanent magnet synchronous motor(PMSM) is proposed in this paper. The technique of feedback linearization and state feedback are used to design controller to replace hysteresis comparators in traditional DTC. The stability of controller is verified by Lyapunov theory. Compared with traditional DTC, the proposed scheme avoids the effect of Hysteresis comparator upper and lower limit pulsation on System Performance. The number of parameters in the proposed scheme is reduced compared with the PID control method. To verify effectiveness of this control scheme, a simulation experiment is carried out through MATLAB/Simulink and compared with the results of traditional DTC.