半桥式零电流转换谐振变换器的研究

对一种半桥式零电流转换谐振变换器 (HBZCTRC)电路拓扑结构进行了详细的分析 ,通过在开关桥臂增加有源辅助谐振网络的方法来实现变换器主开关绝缘栅双极性晶体管 (IGBT)的零电流关断。该变换器的零电流开关范围非常大 ,与负载无关。文中详细分析了它的工作原理 ,给出了在半个周期的主要电流电压波形和各个阶段的电路状态图。并分析了辅助谐振网络参数对变换器工作的影响。研制了一台采用半桥式零电流转换谐振变换器的主电路结构的 IGBT弧焊电源样机 ,实验验证了这种零电流变换器具有适应电压电流变化范围广的特点

Half bridge zero current transition resonant converter

This paper presents a half bridge zero current transition resonant converter (HBZCTRC) circuit topology. The zero current turn off of the main insulated gate bipolar transistor (IGBT) switch of the converter can be realized by adding an active auxiliary resonant network on the switching arm. The range of zero current turn off is very wide and is not affected by the load. The converter's operating principle and the effects of the auxiliary resonant network parameters are analyzed in detail. The main current and voltage waveforms are given with the equivalent circuits at different time intervals in a half switching cycle. An IGBT arc welding prototype with maximum output current 160 A is developed using the zero current transition resonant converter. Experimental results show that the converter has zero current turn off over wide load voltage and current ranges.