NDLI: A novel isolated bidirectional DC-DC converter for ultra-capacitor application in hybrid and electric vehicles

Content Provider	IEEE Xplore Digital Library
Author	Dawei He Ntsama, P. Jinchi Han Habetler, T.G.
Copyright Year	2012
Description	Author affiliation: Tsinghua University, Beijing, 100084, China (Jinchi Han) \|\| Georgia Institute of Technology, Atlanta, 30332, USA (Dawei He; Ntsama, P.; Habetler, T.G.)
Abstract	This paper presents a new isolated bidirectional DC/DC converter for auxiliary power supplies in electric vehicles where high power density, bidirectional power flow and electric isolation are required. Compared to conventional bidirectional converters, this modified half-bridge circuit further minimizes components to 2 capacitors without any other change based on the existing highest power density circuit. With a novel PWM plus phase-shift (PPS) control strategy, it minimizes device current stresses over a wide input voltage range. Moreover, a natural zero-voltage switching method for the whole switches is achieved without additional device to reduce switching loss and device inrush voltage stresses. These advantages make the new converter promising for high power density applications, especially to overcome the high device current stresses problem caused by wide range ultra-capacitor voltage variation. In this paper, firstly, a complete design consideration and principle of the new topology is presented; secondly, an analysis of static state mode is provided; finally, a 15V/50W prototype is built up after a 60V/4kW modeling simulation on computer and it successfully proved this converter's device current stresses minimization and high power density characteristics.
Starting Page	2872
Ending Page	2876
File Size	1349214
Page Count	5
File Format	PDF
ISBN	9781467324199
ISSN	1553572X
e-ISBN	9781467324212
e-ISBN	9781467324205
DOI	10.1109/IECON.2012.6389439
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-25
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Inverters Flywheels Stress Supercapacitors Integrated circuit reliability Lead
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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