Research on Constant Voltage Reset (CVR) Two Transistor Forward Converter

摘要：

As known, two transistor forward (TTF) converter has to be operated with the duty cycle less than 0.5 in order to realize the main transformer reset. And this disadvantage will restrict the range of the input voltage and the further improvement of the system efficiency definitely. Constant voltage reset (CVR) circuit is quite an effective measure to increase the maximum duty cycle which benefits lower secondary rectifier voltage rating and higher efficiency. Here, the CVR circuit will be introduced, an analysis model is proposed, and a detail design guideline of CVR circuit will be given. Finally the CVR circuit for a 280W TTF power supply is designed, and both the simulation and the test results are shown.

关键词： CVR TTF hold up time

作者: Yi Zhang Hover Li Hongjian Gan Jianping Ying

作者单位: Delta Power Electronics Center 238 Minxia Road, Caolu Industry Zone, Pudong, Shanghai, 201209, China

会议类型: 国际会议

会议名称: The Eighth International PCIM China(第八届电子功率器件、智能传送、电源质量国际研讨会)

会议地点: 上海

会议语种:英文

页码: 39-44

在线出版日期: 2009-06-02（万方平台首次上网日期，不代表论文的发表时间）