New PWM Strategy to Enable Dual-Mode Operation Capability in Common-Grounded Transformerless Inverters

Khan, MNH; Hasan, SU; Siwakoti, YP

New PWM Strategy to Enable Dual-Mode Operation Capability in Common-Grounded Transformerless Inverters

Khan, MNH Hasan, SU Siwakoti, YP

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Publisher:: Institute of Electrical and Electronics Engineers (IEEE)
Publication Type:: Journal Article
Citation:: IEEE Journal of Emerging and Selected Topics in Power Electronics, 2022, 10, (6), pp. 7361-7370
Issue Date:: 2022-12-01

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Field	Value	Language
dc.contributor.author	Khan, MNH
dc.contributor.author	Hasan, SU
dc.contributor.author	Siwakoti, YP
dc.date.accessioned	2023-04-11T03:03:36Z
dc.date.available	2023-04-11T03:03:36Z
dc.date.issued	2022-12-01
dc.identifier.citation	IEEE Journal of Emerging and Selected Topics in Power Electronics, 2022, 10, (6), pp. 7361-7370
dc.identifier.issn	2168-6777
dc.identifier.issn	2168-6785
dc.identifier.uri	http://hdl.handle.net/10453/169521
dc.description.abstract	A novel pulsewidth modulation (PWM) technique has been presented in this article, which enables the converter to operate in the conventional (boost) mode as well as in the buck mode (proposed). The proposed buck PWM method significantly reduces the current stresses of the components compared to the boost mode. Using this combined modulation technique, a dual-mode operation of such a class of inverters is demonstrated to accommodate a wide input voltage variation while maintaining the regulation of the output ac voltage. The proposed modulation technique is simple to implement and has been implemented in some of the conventional Type-I and Type-II inverters to demonstrate a very wide input voltage range (200-400 V dc), while keeping a fixed output voltage of 110 V ac rms. The theoretical analysis, key operating circuit, and waveforms are presented along with the thermal profile of various switches. Experimental results show that Type-I and Type-II inverters rated at 500 VA have around 95.5 ± 1% efficiency for a wide load range with a peak efficiency of 97.3% in buck + invert mode for Type-I and 95.5% for Type-II inverters.
dc.language	en
dc.publisher	Institute of Electrical and Electronics Engineers (IEEE)
dc.relation	http://purl.org/au-research/grants/arc/DP210101382
dc.relation.ispartof	IEEE Journal of Emerging and Selected Topics in Power Electronics
dc.relation.isbasedon	10.1109/JESTPE.2022.3182162
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.title	New PWM Strategy to Enable Dual-Mode Operation Capability in Common-Grounded Transformerless Inverters
dc.type	Journal Article
utslib.citation.volume	10
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	*
dc.date.updated	2023-04-11T03:03:35Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	10
utslib.citation.issue	6

Abstract:

A novel pulsewidth modulation (PWM) technique has been presented in this article, which enables the converter to operate in the conventional (boost) mode as well as in the buck mode (proposed). The proposed buck PWM method significantly reduces the current stresses of the components compared to the boost mode. Using this combined modulation technique, a dual-mode operation of such a class of inverters is demonstrated to accommodate a wide input voltage variation while maintaining the regulation of the output ac voltage. The proposed modulation technique is simple to implement and has been implemented in some of the conventional Type-I and Type-II inverters to demonstrate a very wide input voltage range (200-400 V dc), while keeping a fixed output voltage of 110 V ac rms. The theoretical analysis, key operating circuit, and waveforms are presented along with the thermal profile of various switches. Experimental results show that Type-I and Type-II inverters rated at 500 VA have around 95.5 ± 1% efficiency for a wide load range with a peak efficiency of 97.3% in buck + invert mode for Type-I and 95.5% for Type-II inverters.

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http://hdl.handle.net/10453/169521