Energies · 2019 · 28 citations · 30 references
EngineeringAutomotive EngineeringElectrical EngineeringElectromagneticsElectromagnetismPower ElectronicsCharging InfrastructureCharging SystemsElectromagnetic PowerShielding DesignShielding MaterialsWireless Power TransferElectromagnetic ShieldingShieldingShielding EffectivenessShielding Effectiveness AssessmentShielding Effectiveness EvaluationShielding ValidationSystem Performance ModelingWireless Charging Systems
Wireless power transfer (WPT) systems for charging Electric Vehicles (EVs) have gained extensive attention due to their many advantages. However, human exposure to electromagnetic fields (EMFs) has become a serious concern in high-power cases. In this paper, shielding techniques, including magnetic, metallic, and resonant reactive current shields, are investigated. Finite element method software is used to evaluate and compare the shielding effectiveness, charger weight, and system performance. The results show that the resonant reactive current shielding has a low EMF level with reasonable system efficiency and acceptable charger weight. In addition, 5 kW with 15 cm air gap WPT chargers were built to validate the simulation results.
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