Advantages of using a two-switch forward in single-stage power factor corrected power supplies

Lars Petersen

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Abstract

A single-stage power factor corrected power supply using a two-switch forward is proposed to increase efficiency. The converter is operated in the DCM (discontinues conduction mode) and it is shown that this operation mode ensures the intermediate DC-bus to be controlled only by means of circuit parameters and therefore independent of load variations. The DCM operation often has a diminishing effect on the efficiency but by use of the two-switch topology high efficiency with minimum circuit complexity can be achieved in this mode. A 500 W 70 V prototype of the two-switch boost-forward PFC power supply has been implemented. The measured efficiency is between 85% and 88.5% in the range 30 W-500 W and the measured power factor at full load is 0.95.
Original languageEnglish
Title of host publicationProceedings of Telecommunications Energy
Place of PublicationPhoenix, AZ
Publication date2000
Pages325-331
ISBN (Print)0-7803-6407-4
DOIs
Publication statusPublished - 2000
EventTwenty-Second International Telecommunications Energy Conference - Hyatt Regency Phoenix, Phoenix, United States
Duration: 10 Sep 200414 Sep 2004
Conference number: 22

Conference

ConferenceTwenty-Second International Telecommunications Energy Conference
Number22
LocationHyatt Regency Phoenix
CountryUnited States
CityPhoenix
Period10/09/200414/09/2004

Bibliographical note

Copyright: 2000 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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