电工技术学报2018，Vol.33Issue(4)：845-855,11.DOI:10.19595/j.cnki.1000-6753.tces.160866
用于单级桥式PFC变换器电压尖峰抑制的有源钳位电路
Active Clamp Circuit Applying to Absorbing Voltage Spikes in Single-Stage Full-Bridge PFC Converter
摘要
Abstract
Due to the leakage inductance of the transformer, voltage spikes exist across the bridge arm in single-stage full-bridge PFC converter. It seriously affects the normal operation of the converter. To solve this problem, the forming mechanism of voltage spikes across bridge arm and the principle of active clamp circuit absorbing voltage spikes are analyzed. Accordingly, the forming mechanism of drain-source voltage spikes of clamp switch is analyzed, and the method that upper switches of bridge arms are operating in ZVS mode is hence proposed. Regarding the voltage spikes across bridge arm cannot be absorbed during input current zero crossing stage, the method of keeping clamp switch off is this stage is proposed. To avoid the inrush current of clamp switch during input current zero crossing, an improved active clamp circuit is proposed. The analysis and the proposed methods are verified by the simulation and experimental results.关键词
单级桥式/功率因数校正/电压尖峰/有源钳位/冲击电流Key words
Single-stage full-bridge/power factor correction/voltage spikes/active clamp/inrush current分类
信息技术与安全科学引用本文复制引用
黄奕毅,贲洪奇,王韦琦,周迪,齐超..用于单级桥式PFC变换器电压尖峰抑制的有源钳位电路[J].电工技术学报,2018,33(4):845-855,11.基金项目
国家自然科学基金资助项目(51377036). （51377036）
