NDLI: A high efficiency resonant switched capacitor converter with continuous conversion ratio

Content Provider	IEEE Xplore Digital Library
Author	Cervera, A. Evzelman, M. Peretz, M.M. Ben-Yaakov, S.S.
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel (Cervera, A.; Evzelman, M.; Peretz, M.M.; Ben-Yaakov, S.S.)
Abstract	A resonant switched capacitor converter with high efficiency over a wide and continuous conversion ratio is introduced. The efficiency of the topology depends primarily on the conduction losses and is decoupled, to a large extent, from the voltage conversion ratio. This is an advantage over classical switched capacitor converters in which the efficiency is strongly related to the conversion ratio. The operation principle applies three zero current switching (ZCS) states to charge, discharge and balance the remaining charge of the flying capacitor. This results in a Gyrator-behaved voltage-dependent current source with a wide voltage conversion ratio (smaller as well as greater than unity) as well as bidirectional power flow capabilities. The analytical expressions for conversion ratio and expected efficiency are provided and validated by simulation and experiments. The experimental verification of the converter demonstrates peak efficiency of 96%, and above 90% efficiency over a wide range of voltage gains and loading conditions. In addition, the system was found to be highly efficient at the extreme cases of both light and heavy loads.
Starting Page	4969
Ending Page	4976
File Size	1669576
Page Count	8
File Format	PDF
ISBN	9781479903368
DOI	10.1109/ECCE.2013.6647371
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitors Switches Discharges (electric) Topology Voltage control Zero current switching Load flow
Content Type	Text
Resource Type	Article

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