| Abstract |
This paper proposes the implementation of a receiver-side voltage doubler into a WPT (wireless power transfer) charging system to reduce the transmitter currents at the cost of increased receiver current for a fixed power transfer level. For a WPT system with a multi-coil transmitter and simple receiver, this results in an efficiency improvement due to the overall reduction in copper losses. A WPT system with a three-coil transmitter and single coil receiver is investigated, and up to a 13\% system coil efficiency improvement was obtained from simulations for 3.3 kW output power with a receiver-side voltage doubler compared to if a standard full-bridge rectifier was used. Experimental results were then obtained for a reduced scale 1 kW WPT system using a voltage doubler, validating the performance of the applied models. |
