New half-bridge dc-to-dc converters for wide input voltage applications

This paper presents new soft-switched half-bridge dc-to-dc converters intended for applications where the input voltage varies widely. The proposed converters are presented in both non-isolated form and isolated form. The proposed dc-to-dc converters operate with zero voltage switching characteristics for MOSFET switches. The duty ratio of the proposed converter could expand to 100 % and its voltage gain is twice the voltage gain of conventional half-bridge converters. Accordingly, the proposed converters are well suited for applications requiring high conversion efficiency at the presence of wide input voltage variations. The operation and performance of the proposed converters are demonstrated with experimental converters that deliver a 12V/5A output from a 35–60 V input. The non-isolated converter recorded the maximum efficiency of 91 % at 1.5 A load current.

[1]  Wei Wang,et al.  A novel hybrid half bridge DC-DC converter with wide ZVS-range and high efficiency , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[2]  I. Batarseh,et al.  Non-isolated Half Bridge Buck Based Converter for VRM Application , 2007, 2007 IEEE Power Electronics Specialists Conference.

[3]  H. Matsuo,et al.  Design oriented analysis of a novel soft-switching DC-DC converter with 2V/20A DC output , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[4]  A. Khambadkone,et al.  An asymmetrical half bridge flyback converter with zero-voltage and zero-current switching , 2004, 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004.

[5]  Yanfei Liu,et al.  A novel nonisolated half bridge DC-DC converter , 2005, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[6]  Oscar Garcia,et al.  Buck+half bridge (d=50%) topology applied to very low voltage power converters , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).

[7]  Peng Xu,et al.  The optimization of asymmetric half bridge converter , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).

[8]  Xuejun Ma,et al.  PWM and phase-shifted control method for isolated asymmetric half- bridge bi-directional converter , 2008, 2008 IEEE Power Electronics Specialists Conference.