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- Title
Variable Switching Frequency for ZVS over Wide Voltage Range in Dual Active Bridge.
- Authors
Cárcamo, Alberto; Fernandez-Hernandez, Alejandro; Gonzalez-Hernando, Fernando; Vázquez, Aitor; Rodríguez, Alberto
- Abstract
The Dual Active Bridge (DAB) converter is known for its advantageous characteristics, including bidirectionality, galvanic isolation, and soft-switching operation. However, achieving Zero Voltage Switching (ZVS) across the complete operation range is not guaranteed, particularly through a wide input–output voltage ratio. This paper explores the integration of the switching frequency as a control variable in the DAB converter to ensure ZVS operation across a wide voltage range, employing Single Phase Shift (SPS) modulation. The study evaluated the RMS and reactive currents under variable switching frequency, presenting the advantages of this approach. Moreover, it includes a design-oriented analysis of the ZVS limits and their relationship with the switching frequency, aiming to ensure ZVS at any operating point. Experimental results validated the theoretical analysis, while presenting the main advantages of variable switching frequency implementation.
- Subjects
ZERO voltage switching; GALVANIC isolation; VOLTAGE; WHEATSTONE bridge
- Publication
Electronics (2079-9292), 2024, Vol 13, Issue 10, p1800
- ISSN
2079-9292
- Publication type
Article
- DOI
10.3390/electronics13101800