Abstract
For the speed and position control of permanent magnet synchronous motor, an improved exponential reaching law is proposed. Firstly, the mathematical model of permanent magnet synchronous motor in rotating coordinate system is established, and the speed loop sliding mode controller and position loop sliding mode controller are designed. Lyapunov function is established to determine the stability of the designed controller. The control model of position loop, speed loop and current loop is used to simulate the permanent magnet synchronous motor. The effectiveness of the algorithm is verified by comparing with the traditional sliding mode controller.
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