Inductance Dual Model and Control of Multiphase Coupled Inductor Buck Converter

Daniel Zhou, Youssef Elasser, Jaeil Baek, Charles R. Sullivan, Minjie Chen

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

3 Scopus citations

Abstract

This paper presents an inductance dual model for designing coupled inductors in multiphase buck converters. The model is derived as a topological dual of the reluctance model of a multiphase coupled inductor, yielding an inductance-based equivalent circuit with simplified equations for evaluating the transient and steady state performance. The model clearly relates the magnetic geometry to a lumped circuit model, allowing visualization of coupling relationships and magnetic flux in SPICE. The model is conducive to state space and transfer function analysis. The dynamic equations of the M-phase coupled inductor buck converter are derived. It is revealed that the duty ratio to output voltage transfer function of a multiphase coupled inductor buck converter is equivalent to that of a single-phase buck converter. The inductance dual is leveraged to design a programmable coupledinductor that modulates the center leg reluctance to improve the control bandwidth.

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
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
Country/TerritoryDenmark
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

  • coupled inductor
  • inductance dual model
  • multiphase buck converter
  • state space model
  • transfer function

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