A high performance ZVS full-bridge DC-DC 0-50 V/0-10 A power supply with phase-shift control

This paper presents a high-performance DC-DC switching mode power supply designed to deliver a regulated 0-50 V/0-10 A output. The proposed power supply is based on a modified version of the zero-voltage switching (ZVS) full-bridge (FB) phase-shift DC-DC converter, which incorporates commutation auxiliary inductors to provide ZVS for the entire load range as well as a commutation aid circuit to clamp the output diode voltage. The control strategy is based on two control loops operating in cascade mode. The inner loop maintains a regulated output current, whereas the external voltage loop regulates the output voltage, independently of load and input-voltage changes. In order to obtain a high-reliability converter, the control circuit has been implemented using just two integrated circuits (ICs). The phase-shift regulator UC3875 IC generates the gate drive signal to the MOSFET's. The control loop regulators are implemented using the TL074 IC. A theoretical analysis was conducted, and experimental results were obtained for a 0-50 V/0-10 A power supply operating at 100 kHz.

[1]  F. Lee,et al.  Novel full bridge zero-voltage-transition PWM DC/DC converter for high power applications , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[2]  I. Barbi,et al.  On the design and experimentation of a high performance 25 A/48 V rectifier unit , 1992, [Proceedings] Fourteenth International Telecommunications Energy Conference - INTELEC '92.

[3]  Fred C. Lee,et al.  Resonant switches - Topologies and characteristics , 1985, 1985 IEEE Power Electronics Specialists Conference.

[4]  Fred C. Lee,et al.  Small-signal modeling of average current-mode control , 1993 .

[5]  A. S. Kislovski.  Half-bridge power-processing cell utilizing a linear variable inductor and thyristor-dual switches , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

[6]  D.B. Dalal.  A 500 kHz multi-output converter with zero voltage switching , 1990, Fifth Annual Proceedings on Applied Power Electronics Conference and Exposition.

[7]  J. A. Sabate,et al.  Small-signal analysis of the phase-shifted PWM converter , 1992 .

[8]  M. Nakaoka,et al.  Analysis and design of a saturable reactor assisted soft-switching full-bridge DC-DC converter , 1991 .

[9]  Martin F. Schlecht,et al.  A 1 kW, 500 kHz front-end converter for a distributed power supply system , 1989, Proceedings, Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[10]  F.C. Lee,et al.  Design considerations for high-voltage high-power full-bridge zero-voltage-switched PWM converter , 1990, Fifth Annual Proceedings on Applied Power Electronics Conference and Exposition.

[11]  Tore Undeland,et al.  Power Electronics: Converters, Applications and Design , 1989 .

[12]  In-Dong Kim,et al.  Novel constant frequency PWM DC/DC converter with zero voltage switching for both primary switches and secondary rectifying diodes , 1992, IEEE Trans. Ind. Electron..

[13]  F. Lee,et al.  High-voltage, high-power, ZVS, full-bridge PWM converter employing an active snubber , 1991, [Proceedings] APEC '91: Sixth Annual Applied Power Electronics Conference and Exhibition.

[14]  Richard Redl,et al.  Optimum ZVS full-bridge DC/DC converter with PWM phase-shift control: analysis, design considerations, and experimental results , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[15]  Milan M. Jovanovic,et al.  An improved full-bridge zero-voltage-switched PWM converter using a saturable inductor , 1993 .

[16]  Il-Song Kim,et al.  A soft switching constant frequency PWM DC/DC converter with low switch stress and wide linearity , 1990, [Proceedings] IECON '90: 16th Annual Conference of IEEE Industrial Electronics Society.

[17]  R. Redl,et al.  A novel soft-switching full-bridge DC/DC converter: Analysis, design considerations, and experimental results at 1.5 kW, 100 kHz , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.