Interphase L-C 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 L-C 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

Abstract

Hybrid switched capacitor power converters, such as the series-capacitor buck (SCB) converter, have intrinsic L-C 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 <inline-formula><tex-math notation="LaTeX">$L$</tex-math></inline-formula>-<inline-formula><tex-math notation="LaTeX">$C_{o}$</tex-math></inline-formula> resonance and interphase <inline-formula><tex-math notation="LaTeX">$L$</tex-math></inline-formula>-<inline-formula><tex-math notation="LaTeX">$C_{B}$</tex-math></inline-formula> resonance 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 analysis is verified by simulation or experimental results.

Original language	English (US)
Pages (from-to)	1-7
Number of pages	7
Journal	IEEE Transactions on Power Electronics
DOIs	https://doi.org/10.1109/TPEL.2023.3241843
State	Accepted/In press - 2023

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

Keywords

averaged model
Capacitors
control
coupled inductor
Inductors
Integrated circuit modeling
L-C resonance
multiphase converter
Perturbation methods
series-capacitor buck
Transfer functions
Transient analysis
Voltage

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10.1109/TPEL.2023.3241843

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@article{dd9b695af9a1467a8f7ed9d9adaa5ff0,

title = "Interphase L-C 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 L-C 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 $L$-$C_{o}$ resonance and interphase $L$-$C_{B}$ resonance 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 analysis is verified by simulation or experimental results.",

keywords = "averaged model, Capacitors, control, coupled inductor, Inductors, Integrated circuit modeling, L-C resonance, multiphase converter, Perturbation methods, series-capacitor buck, Transfer functions, Transient analysis, Voltage",

author = "Ping Wang and Daniel Zhou and Haoran Li and Giuliano, {David M.} and Gregory Szczeszynski and Stephen Allen and Minjie Chen",

note = "Publisher Copyright: IEEE",

year = "2023",

doi = "10.1109/TPEL.2023.3241843",

language = "English (US)",

pages = "1--7",

journal = "IEEE Transactions on Power Electronics",

issn = "0885-8993",

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

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T1 - Interphase L-C Resonance and Stability Analysis of Series-Capacitor Buck Converters

AU - Wang, Ping

AU - Zhou, Daniel

AU - Li, Haoran

AU - Giuliano, David M.

AU - Szczeszynski, Gregory

AU - Allen, Stephen

AU - Chen, Minjie

N1 - Publisher Copyright: IEEE

PY - 2023

Y1 - 2023

N2 - Hybrid switched capacitor power converters, such as the series-capacitor buck (SCB) converter, have intrinsic L-C 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 $L$-$C_{o}$ resonance and interphase $L$-$C_{B}$ resonance 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 analysis is verified by simulation or experimental results.

AB - Hybrid switched capacitor power converters, such as the series-capacitor buck (SCB) converter, have intrinsic L-C 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 $L$-$C_{o}$ resonance and interphase $L$-$C_{B}$ resonance 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 analysis is verified by simulation or experimental results.

KW - averaged model

KW - Capacitors

KW - control

KW - coupled inductor

KW - Inductors

KW - Integrated circuit modeling

KW - L-C resonance

KW - multiphase converter

KW - Perturbation methods

KW - series-capacitor buck

KW - Transfer functions

KW - Transient analysis

KW - Voltage

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DO - 10.1109/TPEL.2023.3241843

M3 - Article

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SN - 0885-8993

SP - 1

EP - 7

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

ER -

Interphase L-C Resonance and Stability Analysis of Series-Capacitor Buck Converters

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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