Design of flux-weakening control system of PMSM based on fuzzy theory

A Fuzzy Controller for the compensation of the Direct-axis current component in the flux-weakening control system of the Permanent Magnet Synchronous Motor (PMSM) is proposed in this paper. The output torque of PMSM falls down when it operates in the high-speed as the reason of its parameters variation. In order to minimize the influences from the armature reaction, the quadrature-axis current reference component and its deviation with the detection value are chose as the inputs of the Fuzzy controller, and output of the Direct-axis compensation value is obtained as the setting value of the current regulator. The proposed control method is implemented in the experimental platform based on TI DSP chip, the experiment results demonstrate that the Fuzzy control rules and parameters adopted in this paper can improve the performance of torque effectively.