High Frequency Multicell Cascaded Quasi-Square-Wave Boost Converter

Jing Yuan, Yenan Chen, Yongheng Yang, Frede Blaabjerg, Minjie Chen

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

Abstract

This paper presents a multicell cascaded quasi-square-wave (MCQSW) boost converter for non-isolated DC-DC applications with high voltage conversion ratios. The MCQSW boost converter is designedto operate at high frequencies and can achieve zero voltage switching (ZVS), soft charging, currentsharing, and automatic voltage balancing. In the MCQSW converter, many boost cells are connected inparallel in series to distribute the high input current; multiple output capacitors are stacked in series to achieve high output voltage. The multicell parallel-input series-output configuration cansignificantly extend the voltage conversion ratios of the traditional QSW boost converters while maintaining low power conversion stress and enable low input current ripple due to interleaving. The high-frequency ZVS operation is enabled by an analogy control circuitry which can operate up to a few MHz. A 700 kHz to 5 MHz, 15 V-180 V (1:12 conversion ratio), 250 W MCQSW converter was built to validate the effectiveness of the MCQSW converter achieving a peak efficiency of 91%.

Original languageEnglish (US)
Title of host publication2020 IEEE 21st Workshop on Control and Modeling for Power Electronics, COMPEL 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728171609
DOIs
StatePublished - Nov 9 2020
Externally publishedYes
Event21st IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2020 - Aalborg, Denmark
Duration: Nov 9 2020Nov 12 2020

Publication series

Name2020 IEEE 21st Workshop on Control and Modeling for Power Electronics, COMPEL 2020

Conference

Conference21st IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2020
CountryDenmark
CityAalborg
Period11/9/2011/12/20

All Science Journal Classification (ASJC) codes

  • Control and Optimization
  • Modeling and Simulation
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Keywords

  • DC-DC power conversion
  • boost converter
  • high frequency
  • interleaved structure
  • quasi-square-wave converter
  • soft-charging
  • soft-switching
  • switched-capacitor circuit

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