Abstract
This paper proposes an optimal modulation scheme for two-three (2/3)-level dual-active-bridge (DAB) DC-DC converters to guarantee zero-voltage-switching (ZVS) operation and minimize the current stress. Based on the unified ZVS principle, six operating modes are defined and constraints of each ZVS mode are then obtained. According to the operating modes, the power transmission model and current stress under all voltage conversion ratios are derived for optimization. The analytical solutions for minimum current stresses are obtained by using the Lagrange multiplier method with Karush-Kuhn-Tucker conditions. With the proposed modulation scheme, both the conduction and switching losses can be reduced, and thus, the entire efficiency can be improved. Finally, simulation results verify the theoretical analysis and the performance of the optimal modulation scheme.
Original language | English |
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Title of host publication | IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society |
Number of pages | 6 |
Publisher | IEEE |
Publication date | Nov 2020 |
Pages | 2913-2918 |
ISBN (Print) | 978-1-7281-5415-2 |
ISBN (Electronic) | 978-1-7281-5414-5 |
DOIs | |
Publication status | Published - Nov 2020 |
Event | IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society - Online Duration: 18 Oct 2020 → 21 Oct 2020 https://www.iecon2020.org/ |
Conference
Conference | IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society |
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Location | Online |
Period | 18/10/2020 → 21/10/2020 |
Internet address |
Series | Proceedings of the Annual Conference of the IEEE Industrial Electronics Society |
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ISSN | 1553-572X |