CAJ | 학술논문

为提高逆变器的转换效率，提出了一种具有低能耗辅助谐振电路的并联谐振直流环节逆变器。在传统硬开关逆变器的直流环节添加辅助谐振电路，使直流母线电压周期性地归零，实现逆变桥主开关器件的零电压开关，而且辅助开关器件也可以实现零电压关断和零电流开通。此外，其辅助谐振电路只有一个辅助开关器件，控制简单；辅助开关和谐振元件都位于直流母线的并联支路上，有利于降低辅助谐振电路的能耗。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5kW 的实验样机，通过实验结果验证该软开关逆变器的有效性。
위제고역변기적전환효솔，제출료일충구유저능모보조해진전로적병련해진직류배절역변기。재전통경개관역변기적직류배절첨가보조해진전로，사직류모선전압주기성지귀령，실현역변교주개관기건적령전압개관，이차보조개관기건야가이실현령전압관단화령전류개통。차외，기보조해진전로지유일개보조개관기건，공제간단；보조개관화해진원건도위우직류모선적병련지로상，유리우강저보조해진전로적능모。대기공작원리진행분석，급출불동공작모식하적등효전로도화연개관적실현조건。제작일개5kW 적실험양궤，통과실험결과험증해연개관역변기적유효성。
A parallel resonant DC link inverter with low-loss auxiliary resonant circuit was proposed to improve efficiency of the inverter .Auxiliary resonant circuit was added to DC link of conventional inverter to make DC-bus voltage decreased to zero pe-riodically ,which realized zero-voltage operation of all switching devices in inverter .Auxiliary switching devices could also be turned on under zero-current and turned off under zero-voltage .In addition ,only one auxiliary switch was in auxiliary resonant circuit so that control strategy was simple ;auxiliary switch and resonant devices were all in parallel with DC-bus to reduce loss of auxiliary resonant circuit .The operation principle was analyzed .The equivalent circuits at different operation modes and conditions for realiza-tion of soft-switching were presented .A 5kW laboratory prototype had been built .Experimental results were demonstrated to confirm validity of soft-switching inverter presented .