The performance of double closed-loop vector control in three-phase permanent magnet synchronous motor speed regulating system largely depends on the setting of current PI controller parameters,the adjustment cycle is long,and it is easy to be affected by motor parameters.A current hysteresis control method based on fuzzy logic var-iable duty cycle is proposed by taking the advantages of the current hysteresis control,such as insensitivity to disturb-ances and parameters and fast response speed,which can accurately control the three-phase stator current by directly controlling the current vector circle.The fuzzy logic controller is designed to dynamically adjust the duty cycle output in real time according to the current error and the current error change rate.The current error is controlled in a small area and the current tracking performance is improved.The simulation results show that the proposed method can ef-fectively improve the current waveform and the performance of the control system.
关键词
永磁同步电机/模糊逻辑/自适应/电流滞环控制
Key words
Permanent magnet synchronous motor/Fuzzy logic/Adaptive/Current hysteresis control
维普
万方数据