Research on a Sliding Mode Variable Structure Control FOC of PMSM for Electric Vehicles

For improving the robustness and control performance of permanent magnet synchronous motor control systems, a sliding mode variable structure control strategy with variable exponential reaching law is designed in this paper. The stability of the control strategy is also analyzed and proven in this paper. This method overcomes the shortcomings of PI control; it decreases the problem of severe buffeting in traditional sliding-mode variable structure controllers. Simulation and real experiments results show that the method is very effective.