The multi-phase open-winding propulsion system is limited by the junction temperature of high-power switching devices and switching losses,and its low switching frequency and large digital control delay reduces the performance of the propulsion system in high speed operation.To address the above problems,firstly the direct discrete current regulator was introduced and its design process and performance were comparied with the traditional discrete regulator.Secondly,the mathematical and simulation model of the 12-phase open-winding induction motor were combined,the closed-loop control performance of the two types of regulators was verified by comparing and simulating the two types of regulators under the working conditions of wide range of rotational speed change and sudden change of load.The results show that the closed-loop control performance of the direct discrete cur-rent regulator,especially under sudden load change,is significantly better than that of the traditional discrete regulator.Finally,the correctness of the theoretical analysis is verified based on the three-level 12-phase open-winding induction motor test platform.The findings can provide reference for op-timizing the closed-loop control performance of low switching frequency propulsion system.
关键词
多相开绕组电机/复矢量调节器/数字控制延时/低开关频率
Key words
multiphase open-winding motor/complex vector regulator/digital control delay/low switching frequency
维普
万方数据