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

Author

Brunoro, Marcelo ; Vieira, José Luiz F

Author_Institution

CENATEC, Centro de Educacao e Tecnol., Vitoria, Brazil

Volume

14

Issue

3

fYear

1999

fDate

5/1/1999 12:00:00 AM

Firstpage

495

Lastpage

505

Abstract

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

Keywords

DC-DC power convertors; bridge circuits; commutation; power MOSFET; power integrated circuits; power semiconductor switches; switched mode power supplies; switching circuits; 0 to 10 A; 0 to 50 V; DC-DC switching mode power supply; ZVS full-bridge DC-DC power supply; cascade mode control loops; commutation aid circuit; commutation auxiliary inductors; control strategy; integrated circuits; load range; output diode voltage clamp; phase-shift control; phase-shift regulator UC3875 IC; power MOSFET gate drive signal; zero-voltage switching; Circuits; Clamps; DC-DC power converters; Diodes; Inductors; Power supplies; Regulators; Signal generators; Switching converters; Zero voltage switching;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.761693

Filename

761693