A Reverse-Feeding Hold-up Time Strategy for Two-Stage Grid-Interface PFC with a Rectifier-Coupled Boost Inductor

Jaeil Baek, Gun Woo Moon, Minjie Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a reverse-feeding hold-up time strategy to improve the performance of two-stage grid-interface power factor correction (PFC) circuit with a rectifier-coupled boost inductor. During the hold-up time, instead of delivering the energy only through the dc-dc converter (e.g., a LLC converter, or a phase-shift full-bridge (PSFB) converter), the energy stored in the energy-buffer capacitor is also transferred through an extra-winding on the boost inductor to the secondary side. This additional energy transfer path regulates the output voltage during the hold-up time and offers extra flexibility to optimize the system performance during normal operation and hold-up time. With this configuration, the dc-dc converter can be designed as a almost fixed ratio dc transformer. The reverse-feeding strategy can extend the HUT by 25%, reduce the energy-buffer capacitor size by 25%, improve the system peak efficiency (96.5%) and enhance the power density. The effectiveness of the proposed method is verified by a PFC prototype with 100V-240Vrms ac input and 800W, 12V/66.7A dc output.

Original languageEnglish (US)
Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages4693-4700
Number of pages8
ISBN (Electronic)9781728103952
DOIs
StatePublished - Sep 2019
Event11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States
Duration: Sep 29 2019Oct 3 2019

Publication series

Name2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

Conference

Conference11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
CountryUnited States
CityBaltimore
Period9/29/1910/3/19

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Control and Optimization
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Keywords

  • High efficiency
  • High power density
  • Hold-up time (HUT)
  • Phase-shift-full-bridge converter
  • Power factor correction (PFC) converter

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