IEEE Transactions on Industrial Electronics · 2021 · 183 citations · 32 references
EngineeringAutomotive EngineeringElectrical EngineeringElectric Vehicle EngineeringEnergy SystemsPower ElectronicsConverter TopologiesDc-dc ConversionDc-dc ConvertersElectric Vehicle ElectronicsPower Electronics For Electric VehiclesPower Electronics For Hybrid VehiclesBidirectional ChargingBidirectional ConvertersBidirectional Dc-dc ConvertersBidirectional Power ConversionBidirectional Power ConvertersHigh-efficiency ConverterVehicle-to-grid ChargingVehicle-to-grid Power Conversion
The study introduces a wide‑range bidirectional DC‑DC converter with an enhanced voltage‑gain transfer ratio for electric‑vehicle charging and discharging. The converter maintains a common ground, reduces switch voltage stress, achieves high utilization and efficiency, and employs a dead‑beat current controller for smooth, accurate, fast bidirectional power flow in V2G and G2V modes. Experimental tests on a 500 W, 40–200 V prototype confirm the design, showing 97.2 % step‑down and 96.8 % step‑up efficiencies and validating the converter’s ability to charge and discharge EV batteries.
This article proposes a new wide-range bidirectional dc–dc converter that has an improved voltage gain transfer ratio for use in electric vehicle (EV) applications. The converter preserves the common electrical ground between input and output terminals, and presents a low-voltage stress of switches, high utilization factor, and high efficiency. The proposed EV charger performance is evaluated for a bidirectional power flow in grid-connected vehicle-to-grid (V2G) and grid-to-vehicle (G2V) modes. The converter uses a dead-beat current controller in the dc–dc and dc–ac stages, which has a smooth, accurate, and fast response. Finally, experimental results for a 500 W, 40–200 V prototype are provided under a bidirectional power flow in a closed-loop system in the presence of the proposed dead-beat controllers. The obtained results substantiate the theoretical analysis and the applicability of this structure. The converter exhibits the capability for EV battery charging/discharging and demonstrates a peak efficiency of 97.2% and 96.8% in the step-down and step-up modes of operation, respectively.
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