2019 · 13 citations · 8 references
EngineeringElectrical EngineeringElectric Vehicle EngineeringEnergy SystemsPower ElectronicsConverter TopologiesDc-dc ConversionDc-dc ConvertersFast Charging TechnologiesPower Electronics For Electric VehiclesResonant ConvertersBidirectional ConvertersBidirectional Power ConvertersCllc Resonant ConverterEnergy Conversion EfficiencyFast Charging SystemsPower DensityResonant Power ConvertersSynchronous Rectification
This paper presents a bidirectional CLLC resonant converter for the use in electric vehicle fast charging applications, fed from a trolley bus DC power grid. Bidirectional converters generally introduce an increase in design complexity as well as a decreased power density and conversion efficiency, compared to their unidirectional equivalents. The presented converter, because of its symmetrical layout, is able to concentrate all necessary resonant inductances in one passive component and uses a simplified sensorless synchronous rectification technique in order to mitigate these drawbacks. A 12.5kW CLLC prototype for input voltages between 600-800V and output voltages between 300-400V is used for validation. The achieved maximum efficiency equals 96.6%.
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