Series-Connected High Frequency Converters in a DC Microgrid System for DC Light Rail Transit
AbstractThis paper studies and presents a series-connected high frequency DC/DC converter connected to a DC microgrid system to provide auxiliary power for lighting, control and communication in a DC light rail vehicle. Three converters with low voltage and current stresses of power devices are series-connected with single transformers to convert a high voltage input to a low voltage output for a DC light rail vehicle. Thus, Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) with a low voltage rating and a turn-on resistance are adopted in the proposed circuit topology in order to decrease power losses on power switches and copper losses on transformer windings. A duty cycle control with an asymmetric pulse-width modulation is adopted to control the output voltage at the desired voltage level. It is also adopted to reduce switching losses on MOSFETs due to the resonant behavior from a leakage inductor of an isolated transformer and output capacitor of MOSFETs at the turn-on instant. The feasibility and effectiveness of the proposed circuit have been verified by a laboratory prototype with a 760 V input and a 24 V/60 A output. View Full-Text
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Lin, B.-R. Series-Connected High Frequency Converters in a DC Microgrid System for DC Light Rail Transit. Energies 2018, 11, 266.
Lin B-R. Series-Connected High Frequency Converters in a DC Microgrid System for DC Light Rail Transit. Energies. 2018; 11(2):266.Chicago/Turabian Style
Lin, Bor-Ren. 2018. "Series-Connected High Frequency Converters in a DC Microgrid System for DC Light Rail Transit." Energies 11, no. 2: 266.
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