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Title 2 kW Dual Input DC-DC Converter for Fuel cells and Ultracapacitors
Author Bergendorff, Stefan Pihl (Department of Electrical Engineering, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Supervisor Nielsen, Henning Roar (APC Danmark)
Petersen, Jesper Winston (Former APC Danmark)
Andersen, Michael Andreas E. (Department of Electrical Engineering, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Thomsen, Ole Cornelius (Department of Electrical Engineering, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Institution Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
Thesis level Diplom thesis
Year 2007
Abstract This Bachelor thesis covers design and construction of a dual input converter with the ability to be bidirectional, to one of the converter’s input. The work is done in collaboration with American Power Conversion, who wanted an alternative to the DC-DC converter that are currently used for their fuel cell UPS’es, Uninterruptible Power systems. The dual input is a way to eliminate batteries from APC’s system and replace them with ultracapacitors. The Dual input converter is a DC-DC convert with an operating range of 30-60VDC, which it converts to ± 200V. The intended power level for this type of converter is 4kW but the prototype is downscaled to 2kW. The purpose of the thesis is primarily to investigate the potential of the converter in terms of efficiency and complexity. The requirements for the input harmonics is not taken into consideration, since it is the first prototype. The efficiency is high due to a solid design of the power components. The bidirectional part of the converter was not realized due to lack of time and the designed control scheme, is not used to test the converters efficiency because it was not available before the deadline of the thesis. The measurement was made with an improvised control, and an efficiency of 91% was obtained at the lowest input voltage.
Imprint Department of Electrical Engineering, Technical University of Denmark, DTU : DK-2800 Kgs. Lyngby, Denmark
Pages 62
Fulltext
Original PDF 2kW_Dual_input_DC_DC_Converter_for_Fuell_cells_and_Ultracapa.pdf (2.30 MB)
Admin Creation date: 2008-04-14    Update date: 2012-12-19    Source: dtu    ID: 219793    Original MXD