A resonant DC-DC transformer

Author

Ivensky, Gregory ; Abramovitz, Alexander ; Gulko, Michael ; Ben-yaakov, Sam

Author_Institution

Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel

Volume

29

Issue

3

fYear

1993

fDate

7/1/1993 12:00:00 AM

Firstpage

926

Lastpage

934

Abstract

The characteristics of a push-pull parallel resonant converter (PPRC) when operated as a DC-DC transformer were investigated theoretically and experimentally. In the DC-DC transformer region, the voltage transfer ratio of the PPRC was found to be practically constant and independent of the input voltage and load. In this mode, all the switching elements operate in the zero voltage switching (ZVS) condition. Another important feature of the proposed DC-DC transformer is the ability to drive it by an arbitrary switching frequency, provided that the latter is lower than the self-oscillating frequency. This permits the synchronization of the converter to a master clock. The analytical expressions for voltage and current stresses, as well as the other key parameters derived, are applied to develop design guidelines for the DC-DC transformer. The proposed topology was tested experimentally on a 100-W unit which was run in the 200-kHz frequency region

Keywords

DC transformers; high-frequency transformers; power convertors; synchronisation; 100 W; 200 kHz; master clock; push-pull parallel resonant converter; resonant DC-DC transformer; self-oscillating frequency; switching elements; synchronization; voltage transfer ratio; zero voltage switching; Clocks; DC-DC power converters; Frequency synchronization; Guidelines; Resonance; Stress; Switching frequency; Testing; Topology; Zero voltage switching;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/7.220940

Filename

220940