Small size, high efficiency, low loss, these are the advantages of permanent magnet synchronous motor. Based on the disadvantages of the traditional high-frequency square wave injection method, such as strong sensitivity to measurement error, poor robustness and sampling delay, an immune algorithm of optimized filter is proposed and a proportional resonance controller is adopted. Compared with the traditional PI controller, proportional resonance control improves the control precision and robustness of the system. Finally, the simulation is realized in Matlab.
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