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Smart Wireless Power Transmission System For Autonomous EV Charging

Rozman, Matjaz and Ikpehai, Augustine and Adebisi, Bamidele and Rabie, Khaled and Gacanin, Haris and Ji, Helen and Fernando, Michael (2019) Smart Wireless Power Transmission System For Autonomous EV Charging. IEEE Access. ISSN 2169-3536 (In Press)

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Abstract

This paper presents a novel localisation method for electric vehicles (EVs) charging through wireless power transmission (WPT). With the proposed technique, the wireless charging system can self-determine the most efficient coil to transmit power at the EV’s position based on the sensors activated by its wheels. To ensure optimal charging, our approach involves measurement of the transfer efficiency of individual transmission coil to determine the most efficient one to be used. This not only improves the charging performance, but also minimises energy losses by autonomously activating only the coils with the highest transfer efficiencies. The results show that with the proposed system it is possible to detect the coil with maximum transmitting efficiency without the use of actual power transmission and comparison of the measured efficiency. This paper also proves that with the proposed charger set-up, the position of the receiver coil can be detected almost instantly, which indeed saves energy and boosts the charging time.

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