Design and Analysis of Compensation Capacitors In P-S Topology for Wireless System with Buck/Boost Converter on Receiver Side

In this paper, an inductive power transfer method, a battery charger for electric vehicles regulates the battery's current and voltage using a diode bridge rectifier with a dc-dc converter (receiver-side converter). To boost input power factor use compensation capacitors and resonance circuits. In This Paper, designs and analyses of parallel compensation on the transmitter side and series compensation on the receiver side (P/S topology) of wireless power transfer system. In the P-S compensation topology parallel compensation capacitor impacts the switch duty ratio. The receiver-side converter's duty ratio affects resonant-circuit efficiency. Also, the inverter output power factor is impacts by compensation capacitor is connected to input side. The expressions about designing primary-side compensation capacitors of P-S topology for wireless power transfer system. The results shows the optimum capacitance for buck converters is differ from the boost converter.