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Soft-Switching Modulation Method for Full-Bridge DC-AC HF-Link Inverter
Tallinn Univ Technol, Dept Elect Power Engn & Mechatron, Tallinn, Estonia..
Tallinn Univ Technol, Dept Elect Power Engn & Mechatron, Tallinn, Estonia..
Tallinn Univ Technol, Dept Elect Power Engn & Mechatron, Tallinn, Estonia..
Riga Tech Univ, Inst Ind Elect & Elect Engn, Riga, Latvia..
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2019 (English)In: 45th annual conference of the ieee industrial electronics society (IECON 2019), IEEE , 2019, p. 4417-4422Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents an improved modulation method for the cycloconverter stage of high frequency-link DC-AC inverters. By applying the quasi-resonant commutation mode during the entire operating period, the fast and reliable discharge of DC-side capacitances can be provided even if the output current is close to zero. This allows to ensure zero voltage switching (ZVS) conditions for the DC-side transistors, while applying small external snubber capacitors to reduce their turn-off losses. The proposed modulation strategy was significantly simplified and requires no external active auxiliary circuits or multi-mode operation. Moreover, two of the AC-side switches can operate at the fundamental frequency, while the rest operate with zero current switching (ZCS). The proposed modulation method is verified with mathematical analysis, simulation model and experimental prototype of full-bridge HF-link inverter.

Place, publisher, year, edition, pages
IEEE , 2019. p. 4417-4422
Series
IEEE Industrial Electronics Society, ISSN 1553-572X
Keywords [en]
Cycloconverter, DC-AC converter, single stage converter, ZCS, ZVS
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-273534DOI: 10.1109/iecon.2019.8927186ISI: 000522050604068Scopus ID: 2-s2.0-85083982816ISBN: 978-1-7281-4878-6 (print)OAI: oai:DiVA.org:kth-273534DiVA, id: diva2:1430838
Conference
45th Annual Conference of the IEEE Industrial Electronics Society (IECON), OCT 14-17, 2019, Lisbon, PORTUGAL
Note

QC 20200518

Available from: 2020-05-18 Created: 2020-05-18 Last updated: 2020-05-18Bibliographically approved

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Norrga, Staffan

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