Matrix Coupled All-in-One Magnetics for PWM Power Conversion

Ping Wang; Daniel Zhou; Youssef Elasser; Jaeil Baek; Minjie Chen

doi:10.1109/TPEL.2022.3194418

Matrix Coupled All-in-One Magnetics for PWM Power Conversion

Ping Wang, Daniel Zhou, Youssef Elasser, Jaeil Baek, Minjie Chen

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

This paper investigates the matrix coupled “all-in-one” magnetic structure that combines both series coupling and parallel coupling for pulse-width-modulated (PWM) power conversion. A systematic analysis of the current ripple reduction mechanism is performed. Current ripple steering among asymmetric series coupled windings is discussed. The transient performance of the matrix coupled inductor is demystified, providing insights for analyzing converter dynamics and large- or small-signal modeling. To quantify the benefits of matrix coupling, a figure of merit is defined by comparing the current ripple of a matrix coupled inductor to that of a discrete inductor given the same transient speed. The comparison results indicate that a higher number of phases and a stronger matrix coupling coefficient amplify the benefits of matrix coupling. A 1 V-to-5 V input, 1 V-to-5 V output, four-phase matrix coupled synchronous SEPIC converter with planar PCB integrated magnetics is built and tested. The matrix coupled SEPIC 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/in<inline-formula><tex-math notation="LaTeX">$^{3}$</tex-math></inline-formula>. Compared to commercial discrete inductors, the matrix coupled inductor has a 5.6 times smaller size and 8.5 times faster transient speed with similar current ripple and current rating. The experimental results validate the matrix coupling concept and the theoretical analysis, opening the possibilities toward wide adoption of “All-in-One-Magnetics” in PWM topologies.

Original language	English (US)
Pages (from-to)	1-16
Number of pages	16
Journal	IEEE Transactions on Power Electronics
DOIs	https://doi.org/10.1109/TPEL.2022.3194418
State	Accepted/In press - 2022

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

Keywords

Coupled inductor
Couplings
current ripple reduction
inductance dual model
Inductors
integrated magnetics
Magnetics
Matrix converters
multiphase interleaving
PWM converter
SEPIC converter
Transmission line matrix methods
Voltage
Windings

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10.1109/TPEL.2022.3194418

Cite this

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title = "Matrix Coupled All-in-One Magnetics for PWM Power Conversion",

abstract = "This paper investigates the matrix coupled “all-in-one” magnetic structure that combines both series coupling and parallel coupling for pulse-width-modulated (PWM) power conversion. A systematic analysis of the current ripple reduction mechanism is performed. Current ripple steering among asymmetric series coupled windings is discussed. The transient performance of the matrix coupled inductor is demystified, providing insights for analyzing converter dynamics and large- or small-signal modeling. To quantify the benefits of matrix coupling, a figure of merit is defined by comparing the current ripple of a matrix coupled inductor to that of a discrete inductor given the same transient speed. The comparison results indicate that a higher number of phases and a stronger matrix coupling coefficient amplify the benefits of matrix coupling. A 1 V-to-5 V input, 1 V-to-5 V output, four-phase matrix coupled synchronous SEPIC converter with planar PCB integrated magnetics is built and tested. The matrix coupled SEPIC 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/in$^{3}$. Compared to commercial discrete inductors, the matrix coupled inductor has a 5.6 times smaller size and 8.5 times faster transient speed with similar current ripple and current rating. The experimental results validate the matrix coupling concept and the theoretical analysis, opening the possibilities toward wide adoption of “All-in-One-Magnetics” in PWM topologies.",

keywords = "Coupled inductor, Couplings, current ripple reduction, inductance dual model, Inductors, integrated magnetics, Magnetics, Matrix converters, multiphase interleaving, PWM converter, SEPIC converter, Transmission line matrix methods, Voltage, Windings",

author = "Ping Wang and Daniel Zhou and Youssef Elasser and Jaeil Baek and Minjie Chen",

note = "Publisher Copyright: IEEE",

year = "2022",

doi = "10.1109/TPEL.2022.3194418",

language = "English (US)",

pages = "1--16",

journal = "IEEE Transactions on Power Electronics",

issn = "0885-8993",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Matrix Coupled All-in-One Magnetics for PWM Power Conversion

AU - Wang, Ping

AU - Zhou, Daniel

AU - Elasser, Youssef

AU - Baek, Jaeil

AU - Chen, Minjie

N1 - Publisher Copyright: IEEE

PY - 2022

Y1 - 2022

N2 - This paper investigates the matrix coupled “all-in-one” magnetic structure that combines both series coupling and parallel coupling for pulse-width-modulated (PWM) power conversion. A systematic analysis of the current ripple reduction mechanism is performed. Current ripple steering among asymmetric series coupled windings is discussed. The transient performance of the matrix coupled inductor is demystified, providing insights for analyzing converter dynamics and large- or small-signal modeling. To quantify the benefits of matrix coupling, a figure of merit is defined by comparing the current ripple of a matrix coupled inductor to that of a discrete inductor given the same transient speed. The comparison results indicate that a higher number of phases and a stronger matrix coupling coefficient amplify the benefits of matrix coupling. A 1 V-to-5 V input, 1 V-to-5 V output, four-phase matrix coupled synchronous SEPIC converter with planar PCB integrated magnetics is built and tested. The matrix coupled SEPIC 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/in$^{3}$. Compared to commercial discrete inductors, the matrix coupled inductor has a 5.6 times smaller size and 8.5 times faster transient speed with similar current ripple and current rating. The experimental results validate the matrix coupling concept and the theoretical analysis, opening the possibilities toward wide adoption of “All-in-One-Magnetics” in PWM topologies.

AB - This paper investigates the matrix coupled “all-in-one” magnetic structure that combines both series coupling and parallel coupling for pulse-width-modulated (PWM) power conversion. A systematic analysis of the current ripple reduction mechanism is performed. Current ripple steering among asymmetric series coupled windings is discussed. The transient performance of the matrix coupled inductor is demystified, providing insights for analyzing converter dynamics and large- or small-signal modeling. To quantify the benefits of matrix coupling, a figure of merit is defined by comparing the current ripple of a matrix coupled inductor to that of a discrete inductor given the same transient speed. The comparison results indicate that a higher number of phases and a stronger matrix coupling coefficient amplify the benefits of matrix coupling. A 1 V-to-5 V input, 1 V-to-5 V output, four-phase matrix coupled synchronous SEPIC converter with planar PCB integrated magnetics is built and tested. The matrix coupled SEPIC 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/in$^{3}$. Compared to commercial discrete inductors, the matrix coupled inductor has a 5.6 times smaller size and 8.5 times faster transient speed with similar current ripple and current rating. The experimental results validate the matrix coupling concept and the theoretical analysis, opening the possibilities toward wide adoption of “All-in-One-Magnetics” in PWM topologies.

KW - Coupled inductor

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KW - current ripple reduction

KW - inductance dual model

KW - Inductors

KW - integrated magnetics

KW - Magnetics

KW - Matrix converters

KW - multiphase interleaving

KW - PWM converter

KW - SEPIC converter

KW - Transmission line matrix methods

KW - Voltage

KW - Windings

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SP - 1

EP - 16

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

ER -

Matrix Coupled All-in-One Magnetics for PWM Power Conversion

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All Science Journal Classification (ASJC) codes

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