摘要
针对推挽变换器难于实现软开关的问题,提出了一种新颖的带回馈变压器的软开关辅助电路,使两个推挽功率开关管实现软开通和软关断。分析了电路的工作原理并推导出电路参数的计算公式。当回馈馈变压器的升压比和励磁电感满足设计条件时,可避免回馈变压器进入磁饱和状态。研制的实验样机投入实际应用,验证了电路和分析方法的正确性。
For the shortcomings of a traditional push-pull converter, a novel soft switch auxiliary circuit with feedback transformers, which assists the two power devices in push-pull converter to switch softly, is proposed. The operating principle is analyzed and a series of formulas to determine the circuit parameters are derived. When the turns ratio and the magnetizing inductance meet the design conditions, the feedback transformer can avoid entering the magnetic saturation. The soft switching push-pull DC/DC converter has been put into use, verifying the correctness of the circuit and the design method.
出处
《电气技术》
2016年第7期79-82,共4页
Electrical Engineering
基金
中国南方电网公司科技开发项目(K-GX2014-047)
关键词
推挽变换器
软开关
回馈变压器
push-pull converter
soft switch
feedback transformer
