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Titre du document / Document title

Soft switching active snubbers for DC/DC converters

Auteur(s) / Author(s)

ELASSER A. (1) ; TORREY D. A. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Electric Power Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590, ETATS-UNIS

Résumé / Abstract

A soft-switching active snubber is proposed to reduce the turn-off losses of the insulated gate bipolar transistor (IGBT) in a buck converter. The soft-switching snubber provides zero-voltage switching for the IGBT, thereby reducing its high turn-off losses due to the current tailing. The proposed snubber uses an auxiliary switch to discharge the snubber capacitor. This auxiliary switch also operates at zero-voltage and zero-current switching. The size of the auxiliary switch compared to the main switch makes this snubber a good alternative to the conventional snubber or even to passive low-loss snubbers. The use of the soft-switching active snubber permits the IGBT to operate at high frequencies with an improved RBSOA. In the experimental results reported for a 1 kW, 40 kHz prototype, combined switching/snubbing losses are reduced by 36% through the use of the active snubber compared to a conventional RCD snubber. The use of an active snubber allows recovery of part of the energy stored in the snubber capacitor during turn-off. The generic snubber cell for the buck converter is generalized to support the common nonisolated dc/dc converters (buck, boost, buck-boost, Cuk, sepic, zeta) as well as isolated dc/dc converters (forward, flyback, Cuk, and sepic).

Revue / Journal Title

IEEE transactions on power electronics    ISSN  0885-8993   CODEN ITPEE8 

Source / Source

1996, vol. 11, no5, pp. 710-722 (11 ref.)

Langue / Language

Anglais

Editeur / Publisher

Institute of Electrical and Electronics Engineers, New York, NY, ETATS-UNIS  (1986) (Revue)

Mots-clés anglais / English Keywords

Static convertor

;

Direct current convertor

;

Snubber circuit

;

Reduction

;

Energy loss

;

Insulated gate bipolar transistor

;

Pulse duration modulation

;

Waveform

;

Network analysis

;

Topology

;

Review

;

Experimental result

;

Mots-clés français / French Keywords

Convertisseur statique

;

Convertisseur courant continu

;

Circuit aide commutation

;

Réduction

;

Perte énergie

;

Transistor bipolaire grille isolée

;

Modulation durée impulsion

;

Forme onde

;

Analyse circuit

;

Topologie

;

Article synthèse

;

Résultat expérimental

;

Mots-clés espagnols / Spanish Keywords

Convertidor estático

;

Convertidor corriente continua

;

Circuito auxilio conmutacíon

;

Reducción

;

Pérdida energía

;

Transistor bipolar rejilla aislada

;

Modulación duración impulsos

;

Forma onda

;

Análisis circuito

;

Topología

;

Artículo síntesis

;

Resultado experimental

;

Localisation / Location

INIST-CNRS, Cote INIST : 21024, 35400006580477.0050

Nº notice refdoc (ud4) : 3212057



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