Auxiliary resonant pole active clamp three-level soft switching inverter circuit and modulation method

The invention provides an auxiliary resonant pole active clamp three-level soft switching inverter circuit and a modulation method thereof. The circuit includes an active clamp main inverter circuit,an auxiliary resonant commutation circuit, a filter circuit, and a load. The active clamp main inverter circuit comprises six switching tubes with anti-parallel diodes and two identical supporting capacitors. The auxiliary resonant converter circuit comprises two auxiliary switching tubes with anti-parallel diodes, two resonant capacitors and one resonance inductor. The filter circuit is an LC filter circuit. The modulation method provided by the invention can realize the zero voltage switch of the main switch tube and the zero current switch of the auxiliary switch tube. The active clamp three-level hard switching loss is reduced, the system efficiency is improved, and the electromagnetic interference is reduced. 本发明提供种辅助谐振极有源钳位三电平软开关逆变电路及其调制方法。所述电路包括有源钳位主逆变电路、辅助谐振换流电路、滤波电路和负载。有源钳位主逆变电路包括六个带反并联二极管的开关管和两个相同的支撑电容，辅