介绍了一种新型的半桥有源软开关电路拓扑技术,该技术采用半桥主开关电路和有源辅助开关电路构成的特殊软开关电路.主开关负责传递逆变能量,辅助开关负责创造主开关和自身软开通和软关断条件.电路拓扑结构简洁明了:只需在主回路一次侧串接饱和电感,通过辅助开关并接缓冲电容,就能在包括空载在内的全负载范围内实现主开关的零电流开通、零电压关断；辅助开关的零电流/零电压开通、零电流/零电压关断.使得开关损耗小、开关器件电力应力小、节能节材.特别适合逆变式焊割电源的高频化运用,该电路拓扑技术已获得中华人民共和国知识产权局发明专利授权.%This paper proposes a novel active soft switching circuit of half-bridge topology technique,which is a special soft switching circuit consisting of half-bridge switching circuit and auxiliary active switching circuit.The main switching circuit is responsible for transferring the inverter power,the auxiliary circuit is responsible for creating soft switching conditions of the main switching circuit and itself.The half-bridge circuit topology is clear and concise:there is only one saturable inductor connected to the main circuit. Through the connection of the auxiliary switch in parallel with the buffer capacitors, the main switch can achieve ZCS in the turn-on process and ZVS in the turn-off process while the auxiliary switch can achieve ZCS and ZVS both in the turn-on process and in the turn-off process in the range of full load including no-load.Consequently the switching-loss is lower, the current stress and the voltage stress is less,so the energy and material can be saved.The patent of the circuit topology is granted by the state intellectual property office of the P.R.C with the patent No. :ZL?201010532734.6.
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