Anti-Offset UAVs Wireless Charging System Based on Dual-coupled Double-LCC Topology

This paper presents a wireless power transfer (WPT) system for Unmanned Aerial Vehicle (UAV). Employing a dual-coupled double-inductor-capacitor-capacitor (LCC- LCC) compensation topology, the system aims to address the prevalent challenge of misalignment tolerance improvements. It reveals that the system's output is only influenced by <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$M$</tex><inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</inf>, which is the Mutual inductance between transmitting coil <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$L$</tex><inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">P</inf> and receiving coil Ls. Specifically, the Mutual inductance M2 has no effect on the output current. The transmitting coil is formed by connecting an inner coil and an outer circular coil in series, with two rectangular coils positioned on the landing gears. As a result, the mutual inductance increases or decreases on the two receiving coils cancel each other out when moving along the y axis. Besides, the output current of this topology is higher than that of traditional LCC-LCC topology and zero voltage switching (ZVS) can be realized. With the help of above system proposed, the output current is stable regardless of load variations, and it can also remain stable within the misalignment range of −100 to 100 mm in x-axis and −70 to 70 mm in y-axis.