Precise ripple cancellation technique for power-factor pre-regulator circuits

K. H. Leung, Ka Hong Loo, Y. M. Lai

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

Abstract

Power-factor pre-regulators generally suffer from poor dynamic response due to the need to limit the propagation of output voltage ripple at double line frequency into the voltage control loop and to achieve a satisfactory power factor performance. Ripple cancellation methods have been proposed to eliminate the double-line-frequency signal from the sampled output voltage before it propagates into the voltage control loop. However, these methods generally employ idealized formulations that give rise to accurate ripple estimation over a limited range of operating conditions only. In this paper, a new ripple estimation/ cancellation circuit that does not rely on such idealized formulations is proposed. It consists of an independent amplitude tuner circuit and a phase shifter circuit that can provide accurate ripple estimation over a wide range of operating conditions. The proposed circuit is analyzed in detail and verified theoretically by computer simulation. It is shown that ripple cancellation provides a way to decouple the pre-regulator's power factor from its controller's bandwidth and load condition, thus both fast dynamic response and constant near-unity power factor can be achieved.
Original languageEnglish
Title of host publication2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014
PublisherIEEE
ISBN (Electronic)9781479930159
DOIs
Publication statusPublished - 1 Jan 2014
Event2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014 - Lappeenranta, Finland
Duration: 26 Aug 201428 Aug 2014

Conference

Conference2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014
Country/TerritoryFinland
CityLappeenranta
Period26/08/1428/08/14

Keywords

  • converter circuit
  • converter control
  • Power factor correction
  • power quality
  • power supply

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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