Interphase LC Resonance and Stability Analysis of Series-Capacitor Buck Converters

Ping Wang; Daniel Zhou; Haoran Li; David M. Giuliano; Gregory Szczeszynski; Stephen Allen; Minjie Chen

doi:10.1109/TPEL.2023.3241843

Interphase LC Resonance and Stability Analysis of Series-Capacitor Buck Converters

Ping Wang, Daniel Zhou, Haoran Li, David M. Giuliano, Gregory Szczeszynski, Stephen Allen, Minjie Chen

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

8 Scopus citations

Abstract

Hybrid switched capacitor power converters, such as the series-capacitor buck (SCB) converter, have intrinsic LC resonant dynamics that might influence its control stability and transient response. This letter presents a systematic approach to analyzing this intrinsic resonant behavior, which can be classified into output LCoresonance and interphase LCBresonance based on common-mode and differential-mode decomposition. The impacts of coupled inductors on the resonant amplitude, frequency, and settling time during a step line transient are analyzed. The influence of intrinsic resonance on control stability is clarified, providing guidance for controller design. A two-phase SCB prototype was built and tested with discrete and coupled inductors under different operating conditions. All the analyses are verified by simulation or experimental results.

Original language	English (US)
Pages (from-to)	5680-5687
Number of pages	8
Journal	IEEE Transactions on Power Electronics
Volume	38
Issue number	5
DOIs	https://doi.org/10.1109/TPEL.2023.3241843
State	Published - May 1 2023

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

Keywords

Averaged model
LC resonance
control
coupled inductor
multiphase converter
series-capacitor buck (SCB)

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10.1109/TPEL.2023.3241843

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title = "Interphase LC Resonance and Stability Analysis of Series-Capacitor Buck Converters",

abstract = "Hybrid switched capacitor power converters, such as the series-capacitor buck (SCB) converter, have intrinsic LC resonant dynamics that might influence its control stability and transient response. This letter presents a systematic approach to analyzing this intrinsic resonant behavior, which can be classified into output LCoresonance and interphase LCBresonance based on common-mode and differential-mode decomposition. The impacts of coupled inductors on the resonant amplitude, frequency, and settling time during a step line transient are analyzed. The influence of intrinsic resonance on control stability is clarified, providing guidance for controller design. A two-phase SCB prototype was built and tested with discrete and coupled inductors under different operating conditions. All the analyses are verified by simulation or experimental results.",

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AU - Wang, Ping

AU - Zhou, Daniel

AU - Li, Haoran

AU - Giuliano, David M.

AU - Szczeszynski, Gregory

AU - Allen, Stephen

AU - Chen, Minjie

PY - 2023/5/1

Y1 - 2023/5/1

N2 - Hybrid switched capacitor power converters, such as the series-capacitor buck (SCB) converter, have intrinsic LC resonant dynamics that might influence its control stability and transient response. This letter presents a systematic approach to analyzing this intrinsic resonant behavior, which can be classified into output LCoresonance and interphase LCBresonance based on common-mode and differential-mode decomposition. The impacts of coupled inductors on the resonant amplitude, frequency, and settling time during a step line transient are analyzed. The influence of intrinsic resonance on control stability is clarified, providing guidance for controller design. A two-phase SCB prototype was built and tested with discrete and coupled inductors under different operating conditions. All the analyses are verified by simulation or experimental results.

AB - Hybrid switched capacitor power converters, such as the series-capacitor buck (SCB) converter, have intrinsic LC resonant dynamics that might influence its control stability and transient response. This letter presents a systematic approach to analyzing this intrinsic resonant behavior, which can be classified into output LCoresonance and interphase LCBresonance based on common-mode and differential-mode decomposition. The impacts of coupled inductors on the resonant amplitude, frequency, and settling time during a step line transient are analyzed. The influence of intrinsic resonance on control stability is clarified, providing guidance for controller design. A two-phase SCB prototype was built and tested with discrete and coupled inductors under different operating conditions. All the analyses are verified by simulation or experimental results.

KW - Averaged model

KW - LC resonance

KW - control

KW - coupled inductor

KW - multiphase converter

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Interphase LC Resonance and Stability Analysis of Series-Capacitor Buck Converters

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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