|
| 摘要: |
| 介绍了全桥变换器整流输出寄生振荡的产生原理,通过在次级上增加一个简单的电阻-电感-电容-二极管(RLCD)箝位电路,不仅很好地抑制了副边寄生振荡,避免了常规电阻-电容-二极管(RCD)缓冲吸收网络损耗大的缺点,还能一定程度上抑制传统零电压全桥变换器(ZVS)原边环流损耗大和占空比丢失严重的缺点。详细分析了该副边加箝位电路的全桥变换器的工作原理,给出了主电路拓扑结构及相关参数选取,根据所选取参数对主电路进行仿真研究,并设计出一台220V/10A的试验样机,给出了主要仿真和实验波形,验证了该变换器电路拓扑的正确性。 |
| 关键词: 全桥变换器,零电压开关,RLCD箝位电路 |
| DOI： |
| 分类号:TM46 |
| 基金项目: |
|
| Research on secondary clamping circuit of ZVS PWM full-bridge converter |
|
XU Ming YIN Bin ZHOU Yan
|
| Abstract: |
| The cause of parasitic oscillation in the full bridge converter is introduced and a simple RLCD(Resistor-inductor-capacitor-Diode) clamping circuit is added in its secondary side to restrain secondary parasitic oscillation without the great loss as general RCD(Resistor-Capacitor-Diode) buffer snubber networks.It also suppresses the primary circumfluence waste and avoids the great loss of duty cycle of conventional ZVS(Zero-Voltage-Switch) full-bridge converter to a certain extent.Its working principle is analyzed in detail,and the topology of its main circuit and the selection of its parameters are presented.The simulation according to selected parameters is carried out and a 220 V / 10 A prototype is designed.The main experiment and simulation waveforms are provided to validate its correctness. |
| Key words: full-bridge converter,zero-voltage-switch,RLCD clamping circuit |
