CAJ | 학술논문

为实现一种结构简单、控制方便、高效率、高功率密度的逆变器，提出了一种新型谐振直流环节软开关逆变器的拓扑结构。通过在传统硬开关逆变器的直流环节添加辅助谐振单元，使直流母线电压周期性地归零，可以实现逆变桥主开关器件的零电压开关，而且辅助开关器件可以实现零电流开通和零电压关断。此外，其辅助谐振单元只有一个辅助开关器件，所以该逆变器控制相对简单，硬件成本低。对其工作原理进行分析，给出不同工作模式下的等效电路图和软开关的实现条件。制作一个1kW的实验样机，通过实验结果验证该软开关逆变器的有效性。
위실현일충결구간단、공제방편、고효솔、고공솔밀도적역변기，제출료일충신형해진직류배절연개관역변기적탁복결구。통과재전통경개관역변기적직류배절첨가보조해진단원，사직류모선전압주기성지귀령，가이실현역변교주개관기건적령전압개관，이차보조개관기건가이실현령전류개통화령전압관단。차외，기보조해진단원지유일개보조개관기건，소이해역변기공제상대간단，경건성본저。대기공작원리진행분석，급출불동공작모식하적등효전로도화연개관적실현조건。제작일개1kW적실험양궤，통과실험결과험증해연개관역변기적유효성。
A resonant DC link soft-switching inverter was proposed to realize an inverter which has a simple topology ,an easy control strategy ,high efficiency and high power density .Auxiliary resonant unit was added to DC link of conventional inverter to make DC-bus voltage decrease to zero periodically ,which realized zero-voltage operation of all switching devices in inverter .Fur-thermore ,the switching device in the auxiliary resonant unit could be turned on under zero-current and turned off under zero-volt-age .In addition ,because only one auxiliary switch was in the auxiliary resonant unit ,control strategy was relatively simple and cost of hardware was lower .The operation principle was analyzed .The equivalent circuits at different operation modes and conditions for realization of soft-switching were presented .A 1kW laboratory prototype had been built .Experimental results were proposed to con-firm validity of soft-switching inverter presented .