Generalized diamond‐type single DC‐source switched‐capacitor based multilevel inverter with step‐up and natural voltage balancing capabilities

Deliri, S; Varesi, K; Siwakoti, YP; Blaabjerg, F

Generalized diamond‐type single DC‐source switched‐capacitor based multilevel inverter with step‐up and natural voltage balancing capabilities

Deliri, S Varesi, K Siwakoti, YP Blaabjerg, F

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Publisher:: Institution of Engineering and Technology
Publication Type:: Journal Article
Citation:: IET Power Electronics, 2021, 14, (6), pp. 1208-1218
Issue Date:: 2021-03-22

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Field	Value	Language
dc.contributor.author	Deliri, S
dc.contributor.author	Varesi, K
dc.contributor.author	Siwakoti, YP
dc.contributor.author	Blaabjerg, F
dc.date.accessioned	2022-04-30T03:55:13Z
dc.date.available	2022-04-30T03:55:13Z
dc.date.issued	2021-03-22
dc.identifier.citation	IET Power Electronics, 2021, 14, (6), pp. 1208-1218
dc.identifier.issn	1755-4535
dc.identifier.issn	1755-4543
dc.identifier.uri	http://hdl.handle.net/10453/156854
dc.description.abstract	This paper proposes a diamond-shaped high step-up switched-capacitor based basic multilevel inverter topology. The basic switched-capacitor (SC) stage consists of 2 active switches, 2 diodes, and 2 capacitors. Using a single DC source with the unfolding circuit (10 switches, 5 capacitors, and 5 diodes) results in the production of 17 voltage-steps at the output with the gain of up to 8 times of the input voltage. By extending the diamond-shaped switched-capacitor stages, higher voltage levels and voltage gains can be possible. The suggested topology employs two half-bridges (instead of a full-bridge) to produce positive, zero, and negative steps, which reduces the Voltage Stress (VS) on two output switches and consequently reduces Total Voltage Stress (TVS). In addition, the natural voltage balancing of capacitors eliminates the need to an additional control circuitry and consequently reduces the total converter size, complexity, and cost. In addition, modularity, scalability, low voltage ripple on capacitors, low total voltage stress, high power quality, and capability of supplying low/medium power factor (R-L) loads are some of the merits of the proposed topology. The low Cost Function (CF) obtained in the comparison section as well as experimental results verifies the advantages of the proposed topology.
dc.language	English
dc.publisher	Institution of Engineering and Technology
dc.relation.ispartof	IET Power Electronics
dc.relation.isbasedon	10.1049/pel2.12111
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	Electrical & Electronic Engineering
dc.title	Generalized diamond‐type single DC‐source switched‐capacitor based multilevel inverter with step‐up and natural voltage balancing capabilities
dc.type	Journal Article
utslib.citation.volume	14
utslib.for	0906 Electrical and Electronic Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	recently_added	*
pubs.consider-herdc	false
dc.date.updated	2022-04-30T03:55:10Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	14
utslib.citation.issue	6

Abstract:

This paper proposes a diamond-shaped high step-up switched-capacitor based basic multilevel inverter topology. The basic switched-capacitor (SC) stage consists of 2 active switches, 2 diodes, and 2 capacitors. Using a single DC source with the unfolding circuit (10 switches, 5 capacitors, and 5 diodes) results in the production of 17 voltage-steps at the output with the gain of up to 8 times of the input voltage. By extending the diamond-shaped switched-capacitor stages, higher voltage levels and voltage gains can be possible. The suggested topology employs two half-bridges (instead of a full-bridge) to produce positive, zero, and negative steps, which reduces the Voltage Stress (VS) on two output switches and consequently reduces Total Voltage Stress (TVS). In addition, the natural voltage balancing of capacitors eliminates the need to an additional control circuitry and consequently reduces the total converter size, complexity, and cost. In addition, modularity, scalability, low voltage ripple on capacitors, low total voltage stress, high power quality, and capability of supplying low/medium power factor (R-L) loads are some of the merits of the proposed topology. The low Cost Function (CF) obtained in the comparison section as well as experimental results verifies the advantages of the proposed topology.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/156854