Study and Implementation of a Novel Active Clamp Forward Converter

• Main Authors: Ya-Jhe Liu, 劉亞哲
• Other Authors: Yu-Kang Lo
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/3gax6f

碩士 === 國立臺灣科技大學 === 電子工程系 === 102 === This thesis presents the study and implementation of a novel active clamp forward converter to solve the voltage spike problem on the freewheel diode at secondary side. The voltage stress and the switching loss of the secondary component can thus be reduced. At the same time, the primary-side switch can be turned off at decreased drain current to lower the switching loss. Moreover, by adopting the active clamp circuit, the primary-side switch can achieve zero-voltage turn-on to reduce the switching loss and raise the conversion efficiency. The operating principles are analyzed in detail. Finally, a 480-W prototype of the proposed active clamp forward converter has been built according to the design procedures. The peak efficiency can be up to 94.88%.