Lagrange-Multiplier-Based Control Method to Optimize Efficiency for Four-Switch Buck-Boost Converter over Whole Operating Range

Jianquan Liao; Guanqun Qiu; Yuansheng Huang; Vinod Khadkikar

doi:10.1109/TIE.2023.3250745

Lagrange-Multiplier-Based Control Method to Optimize Efficiency for Four-Switch Buck-Boost Converter over Whole Operating Range

Jianquan Liao, Guanqun Qiu, Yuansheng Huang, Vinod Khadkikar

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

16 Scopus citations

Abstract

Four-mode modulation (FMM) method is the most advanced for four-switch buck-boost converter among existing control strategies. But its efficiency is still not optimal. In this article, all FMM methods are analyzed, and the minimum inductor current root mean square value of each FMM method is obtained via the generalized Lagrange multiplier method. Under this circumstance, the optimal FMM methods are selected to form a control method that improves operating efficiency over the whole operating range. Experimental results and comparison with state-of-the-art methods demonstrate the effectiveness and superiority of proposed method.

Original language	British English
Pages (from-to)	822-833
Number of pages	12
Journal	IEEE Transactions on Industrial Electronics
Volume	71
Issue number	1
DOIs	https://doi.org/10.1109/TIE.2023.3250745
State	Published - 1 Jan 2024

Keywords

Four-mode modulation (FMM)
four-switch buck-boost (FSBB) converter
minimum root mean square (rms) inductor current
soft-switching
zero-voltage switch (ZVS)

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10.1109/TIE.2023.3250745

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title = "Lagrange-Multiplier-Based Control Method to Optimize Efficiency for Four-Switch Buck-Boost Converter over Whole Operating Range",

abstract = "Four-mode modulation (FMM) method is the most advanced for four-switch buck-boost converter among existing control strategies. But its efficiency is still not optimal. In this article, all FMM methods are analyzed, and the minimum inductor current root mean square value of each FMM method is obtained via the generalized Lagrange multiplier method. Under this circumstance, the optimal FMM methods are selected to form a control method that improves operating efficiency over the whole operating range. Experimental results and comparison with state-of-the-art methods demonstrate the effectiveness and superiority of proposed method.",

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AU - Huang, Yuansheng

AU - Khadkikar, Vinod

PY - 2024/1/1

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N2 - Four-mode modulation (FMM) method is the most advanced for four-switch buck-boost converter among existing control strategies. But its efficiency is still not optimal. In this article, all FMM methods are analyzed, and the minimum inductor current root mean square value of each FMM method is obtained via the generalized Lagrange multiplier method. Under this circumstance, the optimal FMM methods are selected to form a control method that improves operating efficiency over the whole operating range. Experimental results and comparison with state-of-the-art methods demonstrate the effectiveness and superiority of proposed method.

AB - Four-mode modulation (FMM) method is the most advanced for four-switch buck-boost converter among existing control strategies. But its efficiency is still not optimal. In this article, all FMM methods are analyzed, and the minimum inductor current root mean square value of each FMM method is obtained via the generalized Lagrange multiplier method. Under this circumstance, the optimal FMM methods are selected to form a control method that improves operating efficiency over the whole operating range. Experimental results and comparison with state-of-the-art methods demonstrate the effectiveness and superiority of proposed method.

KW - Four-mode modulation (FMM)

KW - four-switch buck-boost (FSBB) converter

KW - minimum root mean square (rms) inductor current

KW - soft-switching

KW - zero-voltage switch (ZVS)

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Lagrange-Multiplier-Based Control Method to Optimize Efficiency for Four-Switch Buck-Boost Converter over Whole Operating Range

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