Switching characteristics and efficiency improvement with auxiliary resonant snubber based soft-switching inverters

C. C. Chan, K. T. Chau, D. T.W. Chan, Jianming Yao, Jin Sheng Lai, Yong Li

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

33 Citations (Scopus)

Abstract

The auxiliary resonant snubber inverter (RSI) has demonstrated superiority in reduction of switching losses and dv/dt. It was found that the overall inverter system efficiency might not be improved if the resonant current was not controlled in accordance with the load current. This paper proposes an improved control scheme to minimize the operation of auxiliary circuit for efficiency improvement. The principle of this control scheme is to vary the resonant current with variable timing control based on the load current magnitude and to disable the auxiliary circuit operation when diode freewheeling occurs after switching. To illustrate the operation of this control scheme, this paper compares the switching characteristics and inverter power loss of hard-switching inverter, RSI with fixed-timing and variable-timing control and RSI with the proposed control scheme. Experimental results fully agree with the analyses and prove that the proposed control scheme is suitable for RSI to achieve better operating conditions.

Original languageEnglish
Title of host publicationPESC 1998 - 29th Annual IEEE Power Electronics Specialists Conference
Pages429-435
Number of pages7
DOIs
Publication statusPublished - May 1998
Externally publishedYes
Event29th Annual IEEE Power Electronics Specialists Conference, PESC 1998 - Fukuoka, Japan
Duration: 22 May 199822 May 1998

Publication series

NamePESC Record - IEEE Annual Power Electronics Specialists Conference
Volume1
ISSN (Print)0275-9306

Conference

Conference29th Annual IEEE Power Electronics Specialists Conference, PESC 1998
Country/TerritoryJapan
CityFukuoka
Period22/05/9822/05/98

ASJC Scopus subject areas

  • Modelling and Simulation
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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