摘要
为提高逆变器的转换效率,提出一种新型零电压开关谐振直流环节逆变器。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,实现逆变桥开关器件在零电压条件下完成切换,而且辅助谐振单元中的开关器件也可以实现零电压开通和零电流关断。此外,辅助谐振单元中的开关器件和谐振电感都没被设置在直流母线上,降低了辅助谐振单元的损耗。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回路的参数设计原则。制作一个10 kW的实验样机,通过实验结果验证该谐振直流环节逆变器的有效性。
A novel zero-voltage switching resonant DC link inverter was proposed to improve conversion efficiency of the inverter. 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. Furthermore, switching devices in the auxiliary resonant unit could be turned on under zero-voltage and turned off under zero-current. In addition, switching devices and resonant inductors in the auxiliary resonant unit were not placed on DC-bus to reduce losses of auxiliary resonant unit. The equivalent circuits at different operation modes, the analysis of the circuit and principle of parameter design were presented. A 10 kW laboratory prototype had been built. Experimental results were proposed to confirm validity of resonant DC link inverter presented.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第27期74-80,共7页
Proceedings of the CSEE
关键词
逆变器
直流环节
谐振
零电压开关
零电流
开关
inverter
DC switching
zero-current switching link
resonant
zero-voltage
