Study of an Isolated DC-DC Converter for Fuel Cell Applications

Abstract:

This paper presents the analysis and design of a dual active bridge DC-DC converter for fuel cell applications. The zero voltage switching operating condition of such converter is analyzed to select an appropriate turn ratio of the high frequency transformer for a high efficiency operation. The ratio between the output voltage to the fuel cell voltage should be close to the transformer turn ratio to guarantee the zero voltage switching regimes at a light load. The prototype converter was designed to be suitable for the input voltage of 40 to 65 V and output voltage of 360 to 400 V with the transformer turn ratio of 7.33. The converter was tested with a 48 V DC power supply and with a polymer electrolyte membrane fuel cell stack. The maximum power of 700 W was delivered and the efficiency was better than 94% for the whole load range.

• Periodical: Applied Mechanics and Materials (Volume 839)
• Pages: 65-69
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.839.65
• Online since: June 2016
• Authors: Sakda Somkun*, Shanmugham Prabhuraj, Chatchai Sirisamphanwong
• Keywords: Fuel Cells, Hydrogen Energy, Power Converters, Renewable Energy

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