NDLI: Common-Duty-Ratio Control of Input-Parallel Output-Parallel (IPOP) Connected DC–DC Converter Modules With Automatic Sharing of Currents

Content Provider	IEEE Xplore Digital Library
Author	Jianjiang Shi Lingbing Zhou Xiangning He
Copyright Year	1986
Abstract	Input-parallel output-parallel (IPOP) connected converter systems allow the use of low-power converter modules for high-power applications, with interleaving control scheme resulting in smaller filter size, better dynamic performance, and higher power density. In this paper, a new IPOP converter system is proposed, which consists of multiple dual-active half-bridge (DAHB) dc-dc converter modules. Moreover, by applying a common-duty-ratio control scheme, without a dedicated current-sharing controller, the automatic sharing of input currents or load currents is achieved in the IPOP converter even in the presence of substantial differences of 10% in various module parameters. The current-sharing performance of the proposed control method is analyzed using both a small-signal model and a steady-state dc model of the IPOP system. It is concluded that the equal sharing of currents among modules can be achieved by reducing the mismatches in various module parameters, which is achievable in practice. The current-sharing performance of the IPOP converter is also verified by Saber simulation and a 400-W experimental prototype consisting of two DAHB modules. The common-duty-ratio control method can be extended to any IPOP system that consists of three or more converter modules, including traditional dual-active bridge dc-dc converters, which have a characteristic of current source.
Sponsorship	IEEE Power Electronics Society
Starting Page	3277
Ending Page	3291
Page Count	15
File Size	2295137
File Format	PDF
ISSN	08858993
Volume Number	27
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Inductors Load modeling Steady-state Analytical models Switching frequency Switching circuits Capacitors mismatches in various converter parameters Automatic sharing of currents common-duty-ratio control dc–dc converter dual-active half-bridge (DAHB) input-parallel output-parallel (IPOP) connection
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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