Zero-voltage switching implementation of a virtual infinite capacitor

Guy Yona, George Weiss

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

We define the virtual infinite capacitor (VIC) as a nonlinear capacitor that has the property that for an interval of the charge Q (the operating range), the voltage V remains constant. We propose a lossless zero-voltage switching realization for the VIC using a switched power converter and capacitors. This circuit is simple but it requires a complex control algorithm that we describe. There are two controllers needed to operate a VIC: the voltage controller acts fast to maintain the desired terminal voltage, while the charge controller acts more slowly and maintains the charge Q in the desired operating range by influencing the incoming current. The VIC is useful as a filter capacitor for various applications, for example power factor compensators (PFC), as we describe. In spite of using small capacitors, the VIC can replace a very large capacitor in applications that do not require substantial energy storage. We give simulation results for a PFC working in critical conduction mode with a VIC for output voltage filtering.

Original languageEnglish
Title of host publication2015 IEEE 5th International Conference on Power Engineering, Energy and Electrical Drives, POWERENG 2015 - Proceedings
PublisherIEEE Computer Society
Pages157-163
Number of pages7
ISBN (Electronic)9781479999781
DOIs
StatePublished - 14 Sep 2015
Event5th IEEE International Conference on Power Engineering, Energy and Electrical Drives, POWERENG 2015 - Riga, Latvia
Duration: 11 May 201513 May 2015

Publication series

NameInternational Conference on Power Engineering, Energy and Electrical Drives
Volume2015-September
ISSN (Print)2155-5516
ISSN (Electronic)2155-5532

Conference

Conference5th IEEE International Conference on Power Engineering, Energy and Electrical Drives, POWERENG 2015
Country/TerritoryLatvia
CityRiga
Period11/05/1513/05/15

Keywords

  • Zero-voltage switching
  • nonlinear capacitor
  • power factor compensator
  • power filtering
  • stability of time-varying linear systems
  • switched power converter

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