Abstract
This paper presents a new wireless power transfer topology for electric vehicle (EV) charging application. The main emphasis is given on high-frequency dc–ac and ac–dc wireless power transfer stage where the inversion stage is current-fed topology. The required resonance in transmitter side is (C) (LC) type and in the receiver-side series (LC) type. The proposed resonance tank network reduces the inverter switch stress to half of the conventional (L) (C) parallel resonance tank network. Inductor in dc-link provides natural short-circuit protection during inverter fault. The required high-transmitter coil (TC) current for air core coupled inductor circulates through parallel resonating capacitor which reduces inverter switch current stress. Resonant converter provides soft switching at device turn on which reduces switching loss. Also, soft recovery at bridge rectifier eliminates diode reverse recovery loss. The converter is analyzed and simulated using PSIM 9.3. A proof-of-concept 420-W lab-prototype is designed and developed, and hardware results are added to validate the analysis and simulation results.
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