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

M. Brunoro, J.L.F. Vieira
1999 IEEE transactions on power electronics  
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
more » ... e 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 (IC's). 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. Index Terms-Adjustable power supply, high-performance dc-dc converter, ZVS converter.
doi:10.1109/63.761693 fatcat:tzyuy7xs7raonaqplc3yj63r4m