NDLI: Non-isolated bidirectional DC–DC converters with multi-converter functionality employing novel start-up and mode transition techniques

Content Provider	IET Digital Library
Author	Sharma, Ambuj Nag, Soumya Shubhra Bhuvaneswari, Gurumoorthy Veerachary, Mummadi
Abstract	This work targets reducing the mode transition time drastically, for two of the bidirectional DC–DC converters (BDCs) employed in energy storage systems, simultaneously proposing a smooth start-up process. Two different mode transition techniques are introduced for topology A (proposed) and topology B, respectively, whose transition times are much smaller than the existing transition techniques. Topologies A and B are capable of performing all basic converter operations, i.e. buck, boost, inverting buck–boost and non-inverting buck–boost in bidirectional mode, which allows the operating voltage ranges of both V 1 and V 2 to be increased perceivably. Both topologies are compared based on mode transition methodology, stress on the converter switches, inductor size and rating. A start-up technique is also advocated for both topologies so that the start-up response could be smooth. Two 400 W BDCs are designed with voltage levels of 60 and 120 V and experimentally verified for efficient start-up, mode transition and steady-state operations. Both mode-transition techniques proposed here, take 2 μs for the current reversal on the battery side from +5 to −5 A.
Starting Page	3110
Ending Page	3118
Page Count	9
ISSN	17554535
Volume Number	13
e-ISSN	17554543
Issue Number	Issue 14, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/13/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2019.0928
Journal	IET Power Electronics
Publisher Date	2020-06-19
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bidirectional DC–DC Converters Converter Switch DC-DC Power Converter Energy Storage Energy Storage System Inductor Size Mode Transition Methodology Mode Transition Technique Multiconverter Functionality Power Electronics Power Inductors Power Supply Smooth Start-up Process Steady-state Operation Supervisory Circuit Time 2.0 Mus Transformer And Reactors Voltage 120.0 V Voltage 60.0 V
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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