Modeling and design of vertical multiphase coupled inductors with inductance dual model

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

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

Abstract

This paper presents the modeling and design of multiphase coupled inductors with an inductance dual model. Existing models for multiwinding coupled magnetics are reviewed and compared. These models represent identical physical relationships, but reveal different fundamentals and offer distinct design insights. The inductance dual model is particularly suited to the design of high-density, low-loss coupled inductors for multiphase buck converters. A step-by-step procedure for designing coupled inductors based on the inductance dual model is introduced. This procedure is used to design a baseline coupled inductor for a multiphase buck converter. Starting from the baseline design, an optimal procedure is conducted targeting a revised design with improved performance and reduced size. The two designs are compared by experimental measurements. The optimal design procedure reduces the inductor height from 11.5 mm to 5.25 mm, reduces the core loss from 490 mW to 240 mW, and improves the output current slew rate from 1.04 A/ns to 2.08 A/ns.

Original languageEnglish (US)
Title of host publication2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1717-1724
Number of pages8
ISBN (Electronic)9781728189499
DOIs
StatePublished - Jun 14 2021
Event36th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2021 - Virtual, Online, United States
Duration: Jun 14 2021Jun 17 2021

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Conference

Conference36th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2021
Country/TerritoryUnited States
CityVirtual, Online
Period6/14/216/17/21

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Coupled inductor
  • Inductance dual model
  • Lumped circuit model
  • Magnetic circuit model
  • Multiphase buck converter
  • Multiwinding transformer

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