A detailed analytical analysis of a passive resonant snubber cell perfectly constructed for a pulse width modulated d.c.-d.c. buck converter


Bodur H. , Bakan A. , Baysal M.

ELECTRICAL ENGINEERING, vol.85, no.1, pp.45-52, 2003 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 85 Issue: 1
  • Publication Date: 2003
  • Doi Number: 10.1007/s00202-002-0141-7
  • Title of Journal : ELECTRICAL ENGINEERING
  • Page Numbers: pp.45-52

Abstract

In this paper, a detailed analytical analysis of a passive resonant snubber cell that is perfectly constructed for a pulse width modulated (PWM) d.c.-d.c. buck converter is proposed. This snubber cell provides a larger overall efficiency and a wider load range than most of the active snubber cells presented previously, and has a simple structure and low cost. The operation principles and a detailed steady-state analysis of a PWM buck converter implemented with this snubber cell are presented. The theoretical analysis is verified with a prototype of a 5-kW and 50-kHz insulated gate bipolar transistor-(IGBT)-PWM buck converter. All of the semiconductor devices in the converter operate under soft switching conditions. Additionally, at 80% output power, the overall efficiency of the proposed soft switching converter is increased to about 98% from the value of 91% in its counterpart hard switching version.