Quasi-Resonant Boost-Half-Bridge Converter With Reduced Turn-Off Switching Losses for 16 V Fuel Cell Application

An active-clamped current-fed converter can achieve not only lossless clamping but also zero-voltage switching. In particular, a boost-half-bridge (BHB) converter is one of the most suitable candidates for high-current, high-step-up applications owing to its low transformer turn ratio, reduced voltage rating of diodes, zero magnetizing dc offset, and symmetrical structure for all components. In this letter a quasi-resonant switching technique for a BHB converter with active clamping is proposed to significantly reduce turn-off switching losses. Experimental results for a 16 V, 1.2 kW prototype validate the effectiveness of the proposed concept.

[1]  Chung-Yuen Won,et al.  Fuel Cell Generation System With a New Active Clamping Current-Fed Half-Bridge Converter , 2007, IEEE Transactions on Energy Conversion.

[2]  Sewan Choi,et al.  An improved current-fed ZVS isolated boost converter for fuel cell applications , 2010, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition.

[3]  Jung-Min Kwon,et al.  High Step-Up Active-Clamp Converter With Input-Current Doubler and Output-Voltage Doubler for Fuel Cell Power Systems , 2009 .

[4]  Sewan Choi,et al.  An Improved Current-Fed ZVS Isolated Boost Converter for Fuel Cell Applications , 2010, IEEE Transactions on Power Electronics.

[5]  Fred C. Lee,et al.  A soft-switched, full-bridge boost converter employing an active-clamp circuit , 1996, PESC Record. 27th Annual IEEE Power Electronics Specialists Conference.

[6]  V. Meleshin,et al.  Full-bridge isolated current fed converter with active clamp , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[7]  Sang-Kyoo Han,et al.  A new active clamping zero-voltage switching PWM current-fed half-bridge converter , 2005, IEEE Transactions on Power Electronics.

[8]  I. Barbi,et al.  A ZVS clamping mode-current-fed push-pull DC-DC converter , 1998, IEEE International Symposium on Industrial Electronics. Proceedings. ISIE'98 (Cat. No.98TH8357).

[9]  Eugene H. Kim,et al.  High step-up resonant push-pull converter with high efficiency , 2009 .

[10]  Yi Zhao,et al.  High-Step-Up and High-Efficiency Fuel-Cell Power-Generation System With Active-Clamp Flyback–Forward Converter , 2012, IEEE Transactions on Industrial Electronics.

[11]  M Ordonez,et al.  Soft-Switching Techniques for Efficiency Gains in Full-Bridge Fuel Cell Power Conversion , 2011, IEEE Transactions on Power Electronics.