NDLI: Hybrid Phase-Shift-Controlled Three-Level and <italic>LLC</italic> DC–DC Converter With Active Connection at the Secondary Side

Content Provider	IEEE Xplore Digital Library
Author	Zhiqiang Guo Deshang Sha Xiaozhong Liao
Copyright Year	1986
Abstract	This paper proposes a hybrid phase-shift-controlled three-level (TL) and LLC dc-dc converter. The TL dc-dc converter and LLC dc-dc converter have their own transformers. Compared with conventional half-bridge TL dc-dc converters, the proposed one has no additional switch at the primary side of the transformer, where the TL converter shares the lagging switches with the LLC converter. At the secondary side of the transformers, the TL and LLC converters are connected by an active switch. With the aid of the LLC converter, the zero voltage switching (ZVS) of the lagging switches can be achieved easily even under light load conditions. Wide ZVS range for all the switches can be ensured. Both the circulating current at the primary side and the output filter inductance are reduced. Furthermore, the efficiency of the converter is improved dramatically. The features of the proposed converter are analyzed, and the design guidelines are given in the paper. Finally, the performance of the converter is verified by a 1-kW experimental prototype.
Sponsorship	IEEE Power Electronics Society
Starting Page	2985
Ending Page	2996
Page Count	12
File Size	1713569
File Format	PDF
ISSN	08858993
Volume Number	30
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches Zero voltage switching Inductors Capacitors Magnetic tunneling Windings Rectifiers phase shift three level LLC zero voltage switching (ZVS) three-level (TL)
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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