Abstract:

Flux-weakening control of permanent magnet synchronous motor (PMSM) is a hotspot of motor research.However,the objectives of monitoring load conditions and parameters changes real time cannot be achieved by the existing PMSM direct torque flux-weakening control method at full speed only with no-load running.This paper puts forward a new method of flux-weakening control based on fuzzy control,which can intelligently adjust the value of reference direct torque control flux according to the changes of the real-time speed and torque value.The Matlab/Simulink simulation verifies the accuracy of intelligent flux-weakening control of the permanent magnet synchronous motor direct torque control.

Key words: fuzzy control;permanent magnet synchronous motor;direct torque;flux weakening control