WAN Converter: A Family of Multicell PWM Converter with All-in-One Magnetics

Ping Wang, Youssef Elasser, Vincent Yang, Minjie Chen

Research output: Contribution to conferencePaperpeer-review

Abstract

This paper presents a family of PWM converters-the WAN Converter-with matrix coupled 'all-in-one' mag-netics for wide operation range dc-dc applications. The WAN converter comprises multiple PWM converter cells driving a single magnetic component with matrix coupling. The matrix coupled multi-winding magnetics miniaturizes the dc inductive energy storage and significantly reduces the loss and volume of magnetic components. By applying multiphase interleaving, the inductor current ripple can be greatly decreased while maintaining fast transient speed. Topologies with matrix coupled magnetics achieve higher efficiency, higher power density, and faster dynamic response than with discrete magnetic components. To validate the WAN topology and matrix coupling concept, a 1 V-to-5 V input, 1 V-to-5 V output, four-phase SEPIC-based WAN prototype with a planar PCB matrix coupled inductor was designed and tested. PCB windings are optimized to reduce the ac resistance. The WAN prototype can support load current up to 185 A at 5 V-to-1 V voltage conversion with a maximum power density over 470 W/in3. Compared to discrete commercial inductors, the matrix coupled inductor has a 4x smaller size and 9x faster transient speed with similar current ripple and rating.

Original languageEnglish (US)
Pages1035-1042
Number of pages8
DOIs
StatePublished - 2022
Event37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022 - Houston, United States
Duration: Mar 20 2022Mar 24 2022

Conference

Conference37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022
Country/TerritoryUnited States
CityHouston
Period3/20/223/24/22

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Coupled inductor
  • PWM converter
  • inductance dual model
  • integrated magnetics
  • multiphase interleaving

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