一种新型的三相三电平逆变器

A New Type of Three-phase Three-level Inverter

研制了一台新型三相三电平逆变器实验样机,详细分析了其电路的运行机理,通过与传统二极管箝位型三电平逆变器比较,说明该新结构在驱动电路设计上大为简化,同时分析了该结构在平衡所有器件损耗上的优点。通过分析发现,该电路能用目前主流的三电平调制方法进行调制,避免了新算法的开发需求。在自行研制的二极管箝位型三相三电平逆变器和新型三相三电平逆变器上进行实验,结果表明,该新型结构能稳定地完成逆变,证明了该新型结构的正确性与有效性。

This paper analyzes the mechanism of the three-level inverter of new type.By comparison with the traditional three-level diode clamped inverter,it＇s shown that the driver circuit design of the new type is greatly simplified.The advantages of the new structure which can balance the loss of all devices are analyzed.Through the analysis it is found that the circuit is able to use the current mainstream of three-level modulation method for modulation, and can avoide the development of new algorithms for demand.Experiments are done on the three-phase three-level diode clamped inverter and the new type three-phase three-level inverter, the results show that the stability of the new structure can stably complete the inverter,and the results confirm the correctness and validity of the new structure.