IEEE Transactions on Vehicular Technology · 2014 · 1.1K citations · 23 references
EngineeringElectrical EngineeringElectric Vehicle EngineeringElectric Vehicle TechnologyPower ElectronicsCharging SystemsConverter TopologiesPower Electronics For Electric VehiclesResonant CircuitsResonant ConvertersWireless Power TransferCompensation NetworksResonant FrequencyResonant Frequency TuningTuningVehicle Wireless ChargingWireless ChargingWireless Charging SystemsZero-voltage Switching
The paper proposes a double‑sided LCC compensation network and a tuning method for wireless power transfer. The authors analyze the network in the frequency domain and propose a tuning method that achieves zero‑voltage switching for the primary‑side switches. The proposed network achieves a resonant frequency independent of coupling and load, enabling constant switching frequency, and experiments demonstrate a 7.7 kW EV charging system with 96 % efficiency.
This paper proposes a double-sided LCC compensation network and its tuning method for wireless power transfer (WPT). With the proposed topology and its tuning method, the resonant frequency is irrelevant with the coupling coefficient between the two coils and is also independent of the load condition, which means that the system can work at a constant switching frequency. Analysis in frequency domain is given to show the characteristics of the proposed method. We also propose a method to tune the network to realize zero voltage switching (ZVS) for the Primary-side switches. Simulation and experimental results verified analysis and validity of the proposed compensation network and the tuning method. A wireless charging system with output power of up to 7.7 kW for electric vehicles was built, and 96% efficiency from dc power source to battery load is achieved.
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Wireless Power Transfer via Strongly Coupled Magnetic Resonances
André Kurs, Aristeidis Karalis, Robert Moffatt et al. · Science · 2007 · 5.5K citations · Full text