Research on three-level direct torque control inverters based on synovial control
Aims:This paper aims to improve the anti-interference ability and response speed of three-level direct torque control frequency converters,and to solve the long response time problem of traditional PI type DTC in speed and torque fluctuations.Methods:A three-level direct torque control inverter was designed by introducing sliding mode control strategy in the traditional direct torque control system.The three-level vector modulation method and its programming steps were analyzed;and the design method and the stability of three-level direct torque control based on sliding mode control were verified through simulation.Results:The simulation results showed that the average stability time of the system with sliding mode control was 0.013 6 seconds shorter than that of the traditional system;and the speed change amplitude of the improved system was smaller than that of the traditional system when the torque changed.Conclusions:The frequency conversion system based on sliding mode control outperforms traditional methods in terms of speed response,anti-interference,and robustness.
万方数据
维普
