摘要
为提高变流器的能量转移能力,降低控制电路的复杂性,提出一种适用于升压变流器的新的有源软开关缓冲电路。该电路利用辅助开关来参与能量转移;且升压变流器和缓冲器的开关能以零电压切换(ZV S)关断和零电流切换(ZCS)导通的方式工作。虽然流过升压变流器和缓冲器开关的电流不同,但这些开关在导通的大部分时间里并联运行,因此缓冲器开关参与了从电源到输出的能量转移。两个开关采用相同的控制信号和非隔离的门极驱动电路,控制电路十分简单、可靠。该方法通过一个3.2 kW升压变流器原型的实验结果得到证实。
A new active soft-switching snubber applied to boost convercer is presented to increase power transfer capability of the converter and reduce the complexity of control circuits. It employs the auxiliary switches to complete energy transfer,and can operate with zero voltage switching （ZVS） at turning off and zero current switching（ZCS） at turning on. Although the currents through the switches of boost converter and snubber are not equal,the switches operate in parallel during most of the time. Thus the snubber switch takes part in energy transfer from source to output. Because two switches use the same control signal and gate driving circuit, the control circuit is very simple and reliable. The proposed method is verified by the experiment on a 3.2 kW boost converter.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2007年第5期52-57,共6页
Proceedings of the CSU-EPSA
关键词
零电流切换
零电压切换
软开关
脉宽调制式
zero voltage switching （ZVS）
zero current switching （ZCS）
soft switching
pulse width modulator （PWM）
