摘要
提出了一种新颖的三电平双降压式全桥逆变器。该逆变器是在两电平双降压半桥逆变器基础上改进得到,保留了双Buck逆变器无桥臂直通、无体二极管反向恢复问题的优点和半周期工作模式,又克服了其缺点:器件耐压要求减半,更适合高压的输出场合;其桥臂输出不再是传统半桥型逆变器的两电平双极性调制波,而是直流电压利用率高、谐波含量小的三电平单极性调制波;其输入侧不再像半桥型逆变器那样需要2个大电容进行分压。该逆变器是一种高效高可靠且体积小的性能优异的逆变器。试验验证了以上分析的正确性。
A novel dual Buck full bridge three-level inverter （DBFBTLI） was presented. This inverter derived from the traditional dual Buck half bridge dual-level inverter （DBHBI） which had the characteristics of no shoot-through problem, preserving circuit configuration and high efficiency operation. Those merits were remained in proposed inverter. Meanwihe disadvantages of DBHBI were overcame in DBFBTLI, such as voltage stress was halved. Though input voltage was higher, the proposed inverter was also suitable. Because the bridge output wave changed to uni-polarity wave from dual-polarity wave of traditional half bridge inverter, the harmonic contents of output voltage were smaller, so the output filter could be reduced.The two big input equalizing capacitors were not need any more in this new inverter. Experiment verifies those analysis.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2008年第12期55-59,共5页
Proceedings of the CSEE
