A New Arrangement of Active Coils for Wireless Charging of UAV

Zhengwang He, Zhiyong Li, Ruoyue Wang, Ying Fan and Minqian Xu
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Zhengwang He: School of Automation, Central South University, Changsha 410083, China
Zhiyong Li: School of Automation, Central South University, Changsha 410083, China
Ruoyue Wang: School of Automation, Central South University, Changsha 410083, China
Ying Fan: School of Electric Engineering, Guangdong Mechanical & Electronical College of Technology, Guangzhou 510515, China
Minqian Xu: School of Automation, Central South University, Changsha 410083, China

Energies, 2021, vol. 14, issue 18, 1-11

Abstract: This paper presents the design and optimization of a wireless power transfer (WPT) charging system based on magnetically coupled resonant technology, applied to an Unmanned Aerial Vehicle (UAV). In this paper, a charging system, including dual active transmitter coils and a single receiver coil, is proposed. The dual transmitting coils adopt a coaxial structure with different radii. This structure simplifies the calculation of the complex mutual inductance between the coils to a function of mutual inductance only related to the value of the radial misalignment. Aiming toward a constant charging power, the optimal transmission efficiency of electric energy is achieved by controlling the input voltages of the active coils, which are solved via a set of equations defined as Lagrange multipliers. The simulation results of the 570 V and 85,000 Hz system verified the validity of the proposed wireless UAV charging scheme.

Keywords: Lagrange multiplier; magnetically coupled resonant technology; power compensation; radial misalignment (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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