两级AC/DC变换器效率和空载损耗研究

Study of Efficiency and Open-load Loss of Two-stage AC/DC Convert er

对100W两级AC/DC变换器效率和空载损耗进行了研究,提出了改进电路,使变换器的满载效率在宽交流输入电压范围内大于88.9%,空载损耗小于0.74W。提出的改进方法,电路简单,易于实现。

This paper presents the study of 100W two-stage AC/DC converter. The measured full load efficiency of the converter is more than 88.9%,and the open-load loss is less than 0.74W over the universal line range.The improvement on the converter is simple and easy to realise.