Design and Implementation of Interleaved Forward Quasi-Resonant Zero Current Switching Converters

• Main Authors: Jing-Yuan Huang, 黃敬原
• Other Authors: Ming-Yang Cheng
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/39407695422272774652

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 96 === In this thesis, interleaved forward quasi-resonant (QR) zero current switching (ZCS) converters are studied and implemented. Two forward QR converters are parallel connected to increase output power. The interleaved technique is used to control the gate driver signals of two forward QR converters to reduce output current ripple. Also, the QR technique with ZCS is employed to reduce switching losses. The characteristics of the proposed converter are discussed, and the operation principles and design process are studied. Finally, interleaved forward QR ZCS converters with 200 V DC input voltage, 24V/10A output are implemented to verifying the theoretical analysis. Experimental results show that the switches are turned off with ZCS. The output inductor currents are balanced, and the output current ripple is reduced. Besides, the voltage regulation is ±1 %, and the efficiency is 90.9 % under 10 A output condition.