Switched-Capacitor-Based 5-Level T-Type Inverter (SC-5TI) with Soft-Charging and Enhanced DC-Link Voltage Utilization

Lee, SS; Siwakoti, Y; Barzegarkhoo, R; Lee, K-B

Switched-Capacitor-Based 5-Level T-Type Inverter (SC-5TI) with Soft-Charging and Enhanced DC-Link Voltage Utilization

Lee, SS Siwakoti, Y

Barzegarkhoo, R Lee, K-B

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Publisher:: Institute of Electrical and Electronics Engineers
Publication Type:: Journal Article
Citation:: IEEE Transactions on Power Electronics, 2021, 36, (12), pp. 13958-13967
Issue Date:: 2021-01-01

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Field	Value	Language
dc.contributor.author	Lee, SS
dc.contributor.author	Siwakoti, Y https://orcid.org/0000-0002-3869-412X
dc.contributor.author	Barzegarkhoo, R
dc.contributor.author	Lee, K-B
dc.date.accessioned	2022-05-20T05:14:40Z
dc.date.available	2022-05-20T05:14:40Z
dc.date.issued	2021-01-01
dc.identifier.citation	IEEE Transactions on Power Electronics, 2021, 36, (12), pp. 13958-13967
dc.identifier.issn	0885-8993
dc.identifier.issn	1941-0107
dc.identifier.uri	http://hdl.handle.net/10453/157551
dc.description.abstract	The emerging switched-capacitor-based multilevel inverters offer interesting merits such as self-balancing of capacitor voltages and boosting of voltage gain. While the switched capacitors (SCs) in these topologies are charged in parallel with the dc source, severe current spikes issue is inevitable, rendering them impractical at high power. This article proposes a novel switched-capacitor-based T-type inverter that mitigates the current spikes by enabling soft charging for its integrated SCs, where both SC in the topological structure charges through a dedicated circuit comprises of an inductor and two switches. The proposed topology is capable of five-level ac voltage generation and when compared to a classical T-type/ANPC (active neutral-point-clamped) inverter, it achieves higher dc-link voltage utilization since its maximum attainable voltage gain is doubled. Theoretical findings of the proposed topology are validated by both the simulation and experimental results.
dc.language	English
dc.publisher	Institute of Electrical and Electronics Engineers
dc.relation	http://purl.org/au-research/grants/arc/DP210101382
dc.relation.ispartof	IEEE Transactions on Power Electronics
dc.relation.isbasedon	10.1109/tpel.2021.3088443
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	Electrical & Electronic Engineering
dc.title	Switched-Capacitor-Based 5-Level T-Type Inverter (SC-5TI) with Soft-Charging and Enhanced DC-Link Voltage Utilization
dc.type	Journal Article
utslib.citation.volume	36
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	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-05-20T05:14:34Z
pubs.issue	12
pubs.publication-status	Published
pubs.volume	36
utslib.citation.issue	12

Abstract:

The emerging switched-capacitor-based multilevel inverters offer interesting merits such as self-balancing of capacitor voltages and boosting of voltage gain. While the switched capacitors (SCs) in these topologies are charged in parallel with the dc source, severe current spikes issue is inevitable, rendering them impractical at high power. This article proposes a novel switched-capacitor-based T-type inverter that mitigates the current spikes by enabling soft charging for its integrated SCs, where both SC in the topological structure charges through a dedicated circuit comprises of an inductor and two switches. The proposed topology is capable of five-level ac voltage generation and when compared to a classical T-type/ANPC (active neutral-point-clamped) inverter, it achieves higher dc-link voltage utilization since its maximum attainable voltage gain is doubled. Theoretical findings of the proposed topology are validated by both the simulation and experimental results.

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http://hdl.handle.net/10453/157551