基于九开关变换器的非对称六相电机集成车载驱动系统研究

Research of Integrated Vehicle Drive System of Asymmetrical Six-phase Motor Based on Nine-switch Converter

在电动汽车充电、驱动一体化系统上进行改进,提出一种基于九开关变换器的SVPWM算法。该算法给出了九开关变换器27种电压矢量及其在矢量图中对应位置。为了最大程度的提高电压利用率,将矢量图划分为15个扇区,并且选择距离参考矢量最近的四个不同层电压矢量。每个扇区九个开关管共通断八次,尤其降低了中间开关管的通断频率,且有些功率管一直处于导通状态,无需定时器控制,有利于数字化实现。仿真表明,该算法能够有效的应用于双Y移30°永磁同步电机。

A nine-switch converter SVPWM algorithm was proposed based on the EV charging,driving integrated system.The voltage vectors of the nine-switch converters and their corresponding positions in the vector map were given.On this basis,the vector map was divided into 15 sectors,and four different voltage vectors which were closest to the reference vector,were selected to reach the maximum voltage utilization rate.Nine-switch converter open and close eight times of each sector,in particular reduce the switch frequency of the intermediate switch.And some power tubes have been in the conduction state all the way,no timer control,was conducive to digital realization.The simulation and experiment results show that the proposed algorithm can effectively applied to dual Y shift 30 degrees permanent magnet synchronous motor.