Multiphase FCML Converter with Coupled Inductors for Ripple Reduction and Intrinsic Flying Capacitor Voltage Balancing

Daniel H. Zhou, Avi Bendory, Cindy Li, Minjie Chen

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

This paper investigates multiphase flying capacitor multilevel (FCML) converters with coupled inductors for ripple reduction and intrinsic flying capacitor voltage balancing. FCML topologies and coupled inductors are two commonly used techniques to reduce power conversion stress, reduce ripple current, and improve system performance. Combining coupled inductors with multiphase FCML converters opens a wide range of design opportunities. The coupled inductors are shown to intrinsically balance the flying capacitor voltages, granting greater robustness to disturbances compared to uncoupled inductors and natural balancing. The ripple reduction offered by the coupled inductors and FCML structure are derived. The theoretical derivations are experimentally verified using a two-phase, three-level FCML converter. The ripple reduction and voltage balancing are realized as long as the inductors are sufficiently coupled.

Original languageEnglish (US)
Pages1284-1290
Number of pages7
DOIs
StatePublished - 2022
Event37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022 - Houston, United States
Duration: Mar 20 2022Mar 24 2022

Conference

Conference37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022
Country/TerritoryUnited States
CityHouston
Period3/20/223/24/22

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • coupled inductors
  • flying capacitor multilevel converter
  • natural balancing
  • ripple reduction
  • voltage balancing

Fingerprint

Dive into the research topics of 'Multiphase FCML Converter with Coupled Inductors for Ripple Reduction and Intrinsic Flying Capacitor Voltage Balancing'. Together they form a unique fingerprint.

Cite this