组合式交流变换器研究

Research on Combined Mode AC Converter

输入串联、输出并联变换器,能降低变压器输入侧开关管的电压应力和输出侧开关管的电流应力,适用于高输入电压、低输出电压电能变换场合。基于模块化思想,提出了一种输入串联、输出并联组合式电流源高频环节交流变换器,研究了其工作原理和控制策略,此控制策略实现了该变换器的均压均流控制。通过样机实验验证了输入串联、输出并联电流源高频环节交流变换器的原理和控制的正确性。

Input-series and output-parallel（ISOP） converter can reduce the voltage stress of switches connected to the primary coil of transformers and reduce the peak current of switches connected to the secondary coil of these trans- formers,so it is suitable for the high input voltage and high output current conversion application.An ISOP current mode AC converter and its control strategy are proposed.Their operate principles are investigated.The control strategy ensures the voltage sharing of input divided capacitors and the current sharing of output current of the converter.By pototvoe exoeriment, the correctness of ooerate orinciole and control strategy 0fthis converter are proved.