Analysis of coupled-inductor configuration for an interleaved high step-up converter

Wilmar Martinez, Jun Imaoka, Yuki Itoh, Masayoshi Yamamoto, Kazuhiro Umetani

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


High step-up converters are widely used in sustainable energy systems and recently used in automotive applications due to their high voltage gain capability. Nevertheless, with the purpose of obtaining a higher voltage gain, in comparison with conventional boost converters, current high step-up converters often employ additional multiplier cells, which may lead to significant cost-up and low power density. Therefore, a novel two-phase interleaved high step-up converter is proposed in order to minimize additional circuit volume used to achieve large voltage gain. The proposed converter addresses the purpose by a particular coupled inductor where three windings are installed in one or two cores. As a result, the proposed converter can achieve higher voltage gain than the conventional topologies by adding a winding and two diodes to the interleaved two phase boost chopper, besides the coupled-inductor configuration. This paper evaluates two arrangements of the coupled-inductor configuration of the proposed high step-up converter: 1. Three windings integrated in only one core and 2. Two independent inductors with a shared winding. The result revealed that the proposed converter shows higher voltage gain than the normal boost converter and the magnetic integration in the coupled-inductor configuration further increases the voltage gain by 20%.
Original languageEnglish
Title of host publication2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)
Number of pages8
ISBN (Electronic)978-8-9570-8254-6
Publication statusPublished - 30 Jul 2015
MoE publication typeA4 Article in a conference publication


  • choppers (circuits)
  • coupled circuits
  • electric potential
  • power convertors
  • power inductors
  • windings
  • additional circuit volume
  • additional multiplier cells
  • automotive applications
  • coupled-inductor configuration
  • high voltage gain capability
  • interleaved high step-up converter
  • large voltage gain
  • low power density
  • magnetic integration
  • sustainable energy systems
  • two phase boost chopper
  • Density measurement
  • Inductors
  • Integrated circuit modeling
  • Magnetic circuits
  • Magnetic cores
  • Magnetic flux
  • Windings
  • Coupled-Inductor
  • High Step-Up Converter
  • Hybrid Electric Vehicles
  • Power Density


Dive into the research topics of 'Analysis of coupled-inductor configuration for an interleaved high step-up converter'. Together they form a unique fingerprint.

Cite this