A soft switched forward converter without current and voltage stress

Author

Da Silva, E. Soares ; Coelho, E.A.A. ; de Freitas, L.C. ; Vieira, J.B., Jr. ; Farias, V.J.

Author_Institution

Departamento de Engenharia Eletrica, Univ. Fed. de Uberlandia, Brazil

Volume

1

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

266

Abstract

This paper presents a steady-state analysis with a description of a two transistor forward converter operating in soft switching mode without voltage and current stresses. The use of a soft commutation cell allows the auxiliary switch to operate in ZCS mode at turning on and ZVS mode at turning off. The main switch S₁ operates in ZVS-ZCS at turning on and ZVS at turning off and the main switch S₂ operates in ZCS at turning on and hard switching at turning off. The output voltage is controlled using the PWM technique. Operating principles, simulation and experimental results are presented

Keywords

DC-DC power convertors; power semiconductor switches; power transistors; switching circuits; PWM control technique; ZCS; ZVS; ZVS-ZCS; auxiliary switch; current stresses reduction; hard switching; main switch; operating principles; output voltage; soft commutation cell; steady-state analysis; two-transistor forward DC/DC power converter; voltage stresses reduction; Active inductors; Capacitors; Chromium; Stress; Switches; Switching converters; Switching frequency; Turning; Zero current switching; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual

Conference_Location

Vancouver, BC

ISSN

0275-9306

Print_ISBN

0-7803-7067-8

Type

conf

DOI

10.1109/PESC.2001.954031

Filename

954031