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中文摘要：
在简要介绍五相H桥型三电平逆变电路结构的基础上,结合逆导型集成门极换流晶闸管（intergrated gate commutated thyristors,IGCT）器件的开关特性与移相空间矢量调制策略,给出逆变电路的静态工况。在动态工况的分析中,考虑到H桥型结构的独立性与对称性,将多相逆变电路简化为单相单桥臂电路展开讨论。根据功率器件的切换顺序与负载电流的方向,单相单桥臂逆变电路的动态切换过程可划分为4种情况分析,对电流临近换向时特殊状态下的工况切换进行说明。单相动态工况的分析可直接应用于多相H桥逆变系统之中。实验结果证明了理论的正确性。
英文摘要：
Based on the brief introduction about five-phase H-bridge three-level inverter, the static behavior of it was given with the presentation of switching characteristic on reverse conducting intergrated gate commutated thyristors （IGCT） and phase shifting space vector modulation. Considering the independence and symmetry of H-bridge structure, multiphase inverter could be simplified to the single-phase single-leg circuit in the discussion on dynamic behavior. The equivalent circuit could be divided into four situations according to the power devices switching sequence and the direction of load current. The paper analyzed the general behavior and gave the explanation on the special working condition when the current is in close proximity to reverse finally. The analysis can be applied to the multiphase inverter directly. The experimental result proves the validity of the conclusion.
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