基于基波矢量的PRC逆变器开关状态分析

在只考虑基波的情况下,采用谐振槽路相量分析法,分析了基于负载并联谐振电路(Parallel Resonent Circuit,简称PRC)的正弦波逆变电源中负载变化对开关器件软开关运行状态的影响.分析发现,当逆变器负载由重向轻合理变化时,逆变器的工作状态趋向于容性,即电流相位超前于电压相位单调变化.因此,为了使逆变器能有较好的工作状态,PRC电源适合用于负载变化范围不大的场合,以确保逆变器在感性状态下工作.通过仿真和试验证明了分析的正确性.

The Operating State Vector Analysis of PRC Supply with Load-variance

The operating states of inverters switches on sinusoidal supply based on PRC with Load-variance are ana-lyzed by vector method.The operating state changes unidirectional when it's load varies from rated to empty.So an impor-tant factor is given while designing the inverter resonant parameters.For making inverter better operating state,PRC supply should be used when the load-varying range is small.The simulations and experiments show the analysis way is verified.