中文摘要：

针对传统虚拟空间矢量算法在实现中点电位全范围可控的同时,增加了元器件开关频率,进而提高了系统损耗导致器件结温升高的不足,提出一种改进的虚拟空间矢量算法,对冗余小矢量的作用时间进行了更加精确的分配,并保证了小区域切换时输出状态平滑过渡,损耗大大低于传统虚拟空间矢量调制,提高了系统效率。仿真及实验验证了该算法的正确性与可行性。

英文摘要：

The traditional virtual space vector algorithm achieves the balance of the neutral-point potential complete control over full ranges,but it increases the switching frequency of devices,and the device junction temperature is rised because of the increasing loss of the system. Based on the questions occured,an improved virtual space vector algorithm was proposed,assigned the action time of redundancy small vectors more precise,and ensured a smooth transition of output state during the switch,which not only made the fluctuation of neutral-point voltage small,but also got lower losses and higher system efficiency than the traditional virtual space vector modulation. Simulation and experimental results verify the correctness and validity of the algorithm.