Abstract
The traditional PID based vector control of permanent magnet synchronous motor (PMSM) drive can’t realize the complete decoupling control of d and q axis currents. The feedback linearization theory is utilized to decouple the speed and d-axis current of PMSM. In order to solve the problem of robustness degradation caused by feedback linearization, the sliding mode control method is employed, and a novel double power reaching law is introduced to establish a feedback linearized sliding mode control system for PMSM drive system. The system is simulated by Simulink and compared with the traditional PID control method in view of the speed regulation performance. The simulation results show that the new control system has the advantages of high steady-state accuracy, fast dynamic response and strong anti-disturbance capability.
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