Enhancing Efficiency of PMA Standard Wireless Mobile Charging System in Automobiles by incorporating state-of-the-art Wide Bandgap Switch

Abstract

We investigate the effect of a novel switching device (Gallium Nitride based Junctionless FinFET) in lieu of the conventional silicon MOSFET, for the transmitter and receiver sections on a wireless mobile charging system operated by PMA standard of power transfer. In automobiles, input power at the transmitter section is supplied by car battery where its output voltage varies from 9V to 16V depending upon the engine rpm, electric-current used by the accessories, ambient temperate, and charge state of the battery. We aimed to improve the overall efficiency of the system so that it can provide a regulated output of 5V even at the lower minimum value of supply voltage. We show a 2% enhancement in efficiency with the novel switch, where the operating frequency is 240 kHz. The modified wireless system can help to charge mobiles, even when the car has a high need for energy.