Current Balancing of Paralleled Switches in Resonant Converters with Multiphase Coupled Inductor

Tanuj Sen, Jaeil Baek, Minjie Chen

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

1 Scopus citations

Abstract

Paralleling power devices is a commonly used technique to implement high-capacity power converters. However, device mismatches and uneven circuit parasitics may cause current imbalance among devices, diminishing the benefits of paralleling. This paper investigates the current balancing mechanism of multiphase coupled inductors in resonant converters against a variety of circuit asymmetries and disturbances. The current balancing mechanism of coupled inductors for multiple parallel switches is explained in theory. A 1 MHz, 250 W resonant dc-dc converter with four GaN switches in parallel was built to test the effectiveness of a coupled inductor for current balancing. Simulation and experimental results show that paralleling multiple switching devices with a multiphase coupled inductor can greatly mitigate the impact of uneven circuit parasitics and gate signal mismatches and ensure current sharing, with negligible impact on the overall system behavior, including the dc-dc system efficiency.

Original languageEnglish (US)
Title of host publication2021 IEEE 22nd Workshop on Control and Modelling of Power Electronics, COMPEL 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665436359
DOIs
StatePublished - 2021
Event22nd IEEE Workshop on Control and Modelling of Power Electronics, COMPEL 2021 - Cartagena, Colombia
Duration: Nov 2 2021Nov 5 2021

Publication series

Name2021 IEEE 22nd Workshop on Control and Modelling of Power Electronics, COMPEL 2021

Conference

Conference22nd IEEE Workshop on Control and Modelling of Power Electronics, COMPEL 2021
Country/TerritoryColombia
CityCartagena
Period11/2/2111/5/21

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology

Keywords

  • Common mode analysis
  • Coupled inductor
  • Differential mode analysis
  • Inductance dual model
  • Magnetic circuit model
  • Resonant dc-dc converter

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