Hybrid Nonisolated DC-DC Converters Derived From a Passive Switched-Capacitor Cell

This paper presents a hybrid nonisolated dc-dc commutation cell, which is generated by the integration between conventional commutation cell and ladder-type passive switched capacitor (SC) cell. From the resulted hybrid cell are derived three different dc-dc converters: a buck-type, a boost-type, an...

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Published in:	IEEE transactions on power electronics Vol. 33; no. 4; pp. 3157 - 3168
Main Authors:	Vecchia, Mauricio Dalla, Salvador, Marcos Antonio, Lazzarin, Telles Brunelli
Format:	Journal Article
Language:	English
Published:	New York IEEE 01-04-2018 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:	Capacitors Commutation Computer architecture Converters DC-DC power converters Electric potential Energy conversion efficiency Hybrid dc–dc commutation cell Hybrid power systems Inductors nonisolated dc–dc converters Power efficiency switched capacitor Switches Topology Voltage converters (DC to DC)
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Abstract	This paper presents a hybrid nonisolated dc-dc commutation cell, which is generated by the integration between conventional commutation cell and ladder-type passive switched capacitor (SC) cell. From the resulted hybrid cell are derived three different dc-dc converters: a buck-type, a boost-type, and a buck-boost-type. The three structures are analyzed in this paper and are presented the topological stages, static gain characteristics in continuous conduction mode and discontinuous conduction mode, steady-state analysis. The analyses are generalized in relation to the number of switched-capacitor cells employed, which allows the increase of the rated gain of the converters by adding more SC cells. In addition, the proposed hybrid nonisolated dc-dc commutation divides naturally the voltage stress among the semiconductors and capacitors of the power stage. A 1-kW prototype was developed to verify the operation of the three proposed converters and their theoretical analysis. For the buck-type topology, designed with an input voltage of 600 V and output voltage of 450 V, a peak efficiency of 99.2% and efficiency at rated power of 99% were obtained.
AbstractList	This paper presents a hybrid nonisolated dc-dc commutation cell, which is generated by the integration between conventional commutation cell and ladder-type passive switched capacitor (SC) cell. From the resulted hybrid cell are derived three different dc-dc converters: a buck-type, a boost-type, and a buck-boost-type. The three structures are analyzed in this paper and are presented the topological stages, static gain characteristics in continuous conduction mode and discontinuous conduction mode, steady-state analysis. The analyses are generalized in relation to the number of switched-capacitor cells employed, which allows the increase of the rated gain of the converters by adding more SC cells. In addition, the proposed hybrid nonisolated dc-dc commutation divides naturally the voltage stress among the semiconductors and capacitors of the power stage. A 1-kW prototype was developed to verify the operation of the three proposed converters and their theoretical analysis. For the buck-type topology, designed with an input voltage of 600 V and output voltage of 450 V, a peak efficiency of 99.2% and efficiency at rated power of 99% were obtained.
Author	Vecchia, Mauricio Dalla Salvador, Marcos Antonio Lazzarin, Telles Brunelli
Author_xml	– sequence: 1 givenname: Mauricio Dalla surname: Vecchia fullname: Vecchia, Mauricio Dalla email: mauricio.dallavecchia@kuleuven.be organization: Department of Electrical Engineering, Federal University of Santa Catarina, Florianópolis, Brazil – sequence: 2 givenname: Marcos Antonio orcidid: 0000-0002-6273-5622 surname: Salvador fullname: Salvador, Marcos Antonio email: msal.salvador@gmail.com organization: Department of Electrical Engineering, Federal University of Salta Catarina, Florianópolis, Brazil – sequence: 3 givenname: Telles Brunelli orcidid: 0000-0001-8598-8641 surname: Lazzarin fullname: Lazzarin, Telles Brunelli email: telles@inep.ufsc.br organization: Department of Electrical Engineering, Federal University of Salta Catarina, Florianópolis, Brazil
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SubjectTerms	Capacitors Commutation Computer architecture Converters DC-DC power converters Electric potential Energy conversion efficiency Hybrid dc–dc commutation cell Hybrid power systems Inductors nonisolated dc–dc converters Power efficiency switched capacitor Switches Topology Voltage converters (DC to DC)
Title	Hybrid Nonisolated DC-DC Converters Derived From a Passive Switched-Capacitor Cell
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