Abstract
This paper focuses on the application of low-speed direct drive servo. A surface mount PMSM control method based on deadbeat predictive control (DPC) and high-frequency injection (HFI) sensorless control is proposed. DPC is used to replace the PI controller in FOC to achieve better dynamic performance, and the d-axis cosine high-frequency injection position detection method is introduced to perform the sensorless control of surface mounted PMSM. A simulation is carried out to verify the performance of proposed method. The simulation results show that the proposed method has smaller speed tracking error and better speed stability than the traditional PI controller. It can also have strong regulation ability and robustness under sudden change of load and speed.
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