Steady-state analysis of the symmetrical push-pull power converter employing a matrix transformer

Author

Lai, Ray-Shyang ; Ngo, Khai D T ; Watson, J. Kenneth

Author_Institution

Dept. of Electr. Eng., Florida Univ., Gainesville, FL, USA

Volume

7

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

44

Lastpage

53

Abstract

Data published for the symmetrical push-pull power converter (SPPPC) show that the matrix transformer and the cross-coupling capacitors in this buck-type topology introduce unusual waveforms and properties. Circuit operation is examined in order to seek a simplified explanation of the published observations. Steady-state performance is analyzed and design equations are developed using state-space averaging. It is found that the SPPPC is equivalent to the conventional push-pull converter with an input filter as far as steady-state behavior and voltage/current ripple are concerned. Despite the presence of the cross-coupling capacitors, the currents in the primary windings in series with the same switch are identical. The RMS current in the primary windings of the SPPPC is lower than that in the conventional push-pull converter

Keywords

power convertors; transformers; RMS current; buck-type topology; cross-coupling capacitors; current ripple; input filter; matrix transformer; state-space averaging; steady-state analysis; symmetrical push-pull power converter; voltage ripple; Capacitors; Circuit topology; Equations; Filters; Matrix converters; Performance analysis; Steady-state; Switches; Symmetric matrices; Voltage;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.124576

Filename

124576