An Input-Series-Output-Parallel Connected Four-Switch Buck-Boost-Integrated CLLC DC Transformer with Bidirectional Natural Power-Sharing Property

This paper introduces an input-series-and-output-parallel (ISOP) connected two-stage modular four-switch Buck-Boost (FSBB)-integrated CLLC converter (FIC). This integrated FIC module not only improves system efficiency but also enhances the capability of soft-switching. Furthermore, by properly desi...

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Main Authors: Wei, Ruizhi, Wu, Xuesong, Liu, Rui, Ding, Li, Li, Wenze, Li, Yunwei Ryan
Format: Conference Proceeding
Language:English
Subjects:
duty cycle
Energy conversion
Feedforward systems
four-switch Buck-Boost (FSBB)-integrated CLLC converter (FIC)
input-series-output-parallel (ISOP)
maximum system efficiency tracking
phase shift
Reliability
System performance
Voltage control
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creator Wei, Ruizhi
Wu, Xuesong
Liu, Rui
Ding, Li
Li, Wenze
Li, Yunwei Ryan
description This paper introduces an input-series-and-output-parallel (ISOP) connected two-stage modular four-switch Buck-Boost (FSBB)-integrated CLLC converter (FIC). This integrated FIC module not only improves system efficiency but also enhances the capability of soft-switching. Furthermore, by properly designing the resonant parameters and utilizing the proposed controller, natural power-sharing can be achieved. To regulate the output voltage, a PI compensator with input voltage feedforward is employed to adjust the duty cycle. Additionally, a maximum efficiency tracking algorithm is employed to find the optimal phase shift, thereby reducing system losses. Finally, simulations and experiments are conducted to validate the effectiveness of the proposed scheme.
doi_str_mv 10.1109/ECCE53617.2023.10361979
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subjects duty cycle
Energy conversion
Feedforward systems
four-switch Buck-Boost (FSBB)-integrated CLLC converter (FIC)
input-series-output-parallel (ISOP)
maximum system efficiency tracking
phase shift
Reliability
System performance
Voltage control
title An Input-Series-Output-Parallel Connected Four-Switch Buck-Boost-Integrated CLLC DC Transformer with Bidirectional Natural Power-Sharing Property
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