Design of a four-phase interleaved boost circuit with closed-coupled inductors

Daigoro Ebisumoto, Masataka Ishihara, Shota Kimura, Wilmar Martinez, Mostafa Noah, Masayoshi Yamamoto, Jun Imaoka

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


In this paper, a novel magnetic structure suitable for boost converters is proposed. Multi-phase interleaved method using coupled-inductor has gained attention in electric powertrains for electric, hybrid and fuel cell vehicles in order to achieve high power density. In fact, a four-phase boost converter using coupled inductor is used in the drive system of the Honda CLARITY. In particular, magnetic coupling method is used in coupled inductors, Loosely-Coupled Inductors (LCI) and Closed-Coupled Inductors (CCI). This study is focused on these methods, especially using the CCI. This paper presents a design method of a closed-coupled inductors using generic cores for a four-phase interleaved boost converter. In addition a comparison between the proposed topology with other conventional non-coupled methods is carried out. Furthermore, the evaluation of miniaturization is studied. As a result, the proposed method can achieve a huge reduction in the core volume and mass.
Original languageEnglish
Title of host publication2016 IEEE Energy Conversion Congress and Exposition (ECCE)
Number of pages6
Publication statusPublished - 16 Feb 2017
MoE publication typeA4 Article in a conference publication


  • power convertors
  • power inductors
  • CCI
  • Honda CLARITY
  • LCI
  • boost converters
  • closed- coupled inductors
  • closed-coupled inductors
  • electric powertrains
  • electric vehicles
  • four-phase interleaved boost circuit design
  • fuel cell vehicles
  • generic cores
  • hybrid vehicles
  • loosely-coupled inductors
  • magnetic structure
  • multiphase interleaved method
  • noncoupled methods
  • Inductors
  • Legged locomotion
  • Magnetic circuits
  • Magnetic cores
  • Magnetic flux
  • Saturation magnetization
  • Windings
  • Closed-coupled inductors
  • DC-DC converter
  • downsizing and light weight
  • generic core
  • multi-phase


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