Stability analysis of two-stage PFC power supplies

Octavian Dranga, Grace Chu, Chi Kong Tse, Siu Chung Wong

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

10 Citations (Scopus)


Power-factor-correction (PFC) power supplies are required to provide high input power factor and tight output voltage regulation. The usual configuration takes a two-stage cascade structure, consisting of a PFC preregulator and a dc/dc converter. Previous studies of the dynamical behaviour mainly focused on the boost PFC preregulator, assuming that it is being terminated by a resistive load. However, in practice, as the PFC preregulator is terminated by a dc/dc converter whose characteristics differ from resistive load's, the assumption of resistive load termination gives rather inaccurate information about the stability of the system. In this paper we study the complete two-stage PFC power supply and show that the interaction between the PFC stage and the dc/dc converter stage plays an important role in determining the stability of the system.
Original languageEnglish
Title of host publication37th IEEE Power Electronics Specialists Conference 2006, PESC'06
Publication statusPublished - 1 Dec 2006
Event37th IEEE Power Electronics Specialists Conference 2006, PESC'06 - Jeju, Korea, Republic of
Duration: 18 Jun 200622 Jun 2006


Conference37th IEEE Power Electronics Specialists Conference 2006, PESC'06
Country/TerritoryKorea, Republic of

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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