Family of improved ZVT PWM converters using a self-commutated auxiliary network

Author

Martins, M.L. ; Pinheiro, H. ; Pinheiro, J.R. ; Gründling, H.A. ; Hey, H.L.

Author_Institution

Power Electron. & Control Res. Group GEPOC, CT Fed. Univ. of Santa Maria UFSM, Brazil

Volume

150

Issue

6

fYear

2003

Firstpage

680

Lastpage

688

Abstract

A family of zero voltage transition (ZVT) DC-DC PWM converters which uses a series resonant L-C network connected in series with the auxiliary switch, called a self-commutated auxiliary network, is presented. Thus, a simple and reliable means of achieving ZCS conditions to auxiliary switch commutations for wide line and load ranges is provided. Furthermore, this auxiliary network is placed in parallel with the main power converter maintaining the ZVT characteristics, so that neither voltage nor current place additional stresses on main devices. The improved ZVT PWM boost converter is analysed and its feasibility and reliability is confirmed by experimental results obtained from a 1 kW, 100 kHz laboratory prototype.

Keywords

DC-DC power convertors; PWM power convertors; commutation; reliability; switching convertors; 1 kW; 100 kHz; DC-DC PWM converters; ZCS; ZVT PWM converters; auxiliary switch; auxiliary switch commutations; reliability; self-commutated auxiliary network; series resonant L-C network; zero voltage transition;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:20030907

Filename

1260161