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Title: Switching Control Strategy to Extend the ZVS Operating Range of a Dual Active Bridge AC/DC Converter
Authors: Everts, Jordi
Van den Keybus, Jeroen
Driesen, Johan
Issue Date: 17-Sep-2011
Publisher: IEEE
Host Document: FULL PROCEEDINGS of the 3th IEEE Energy Conversion Congress & Exposition (ECCE 2011) pages:4107-4114
Conference: IEEE Energy Conversion Congress & Exposition (ECCE 2011) edition:3 location:Phoenix, Arizona (USA) date:17-22 September 2011
Abstract: A switching control strategy to extend the zero- voltage-switching (ZVS) operating range of a Dual Active Bridge (DAB) AC/DC converter to the entire input-voltage interval and the full power range is proposed. The converter topology consists of a DAB DC/DC converter, receiving a rectified AC line voltage via a synchronous rectifier. The DAB comprises a primary side half bridge and secondary side full bridge, linked by a high- frequency isolation transformer and inductor. Using conventional control strategies, the soft-switching boundary conditions are exceeded at the higher voltage conversion ratios of the AC input interval. A novel pulse-width-modulation strategy to fully eliminate these boundaries and its analysis are presented in this paper, allowing increased performance (in terms of efficiency and stresses). Additionally, by using a half bridge / full bridge configuration, the number of active components is reduced. A prototype converter was constructed and experimental results are given to validate the theoretical analyses and practical feasibility of the proposed strategy.
ISBN: 978-1-4577-0541-0
Publication status: published
KU Leuven publication type: IC
Appears in Collections:ESAT - ELECTA, Electrical Energy Computer Architectures

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