Design of UAV wireless power transmission system based on coupling coil structure optimization

Abstract

With the development of unmanned aerial vehicle (UAV), it has been used in many fields, such as aerial photography, military, and transportation. However, it is a challenge for charging due to its short battery life. Wireless charging has been considered as a good UAV solution. In this paper, we proposed a wireless power transmission system (WPT) through inductive coupling and analyzed the power efficiency of the inductive coupling. The WPT included a charging station, which can provide energy through an induction coil array, and a portable energy receiving device mounted on the base of the UAV. Moreover, the power efficiency was analyzed though the equivalent circuit of WPT and the mathematical model of the power efficiency was established. The results showed that the WPT can transfer energy to UAV with high power efficiency within a 30 mm lateral displacement range.

Time Allocation and Optimization in UAV-Enabled Wireless Powered Communication Networks

“…For wired charging, η is close to 1, g b,u = 1 and P L bs−uav = G bs = G uav ≈ 0 dB. For inductive coupling [42], g b,u = 1, P L bs−uav = G bs = G uav ≈ 0 dB, the distance d bs−uav in P L bs−uav can be 3 cm [43], and η can be any value between 0 and 1 depending on P uav−r . For laser beaming [44], g b,u = 1, G bs = G uav ≈ 0 dB, P L bs−uav = 10 C κv ( λ Cχ ) −ρ sd d bs−uav lg e and η can be 0.54 [45], C and C χ are two constants, κ v is the visibility, λ is the wavelength, ρ sd is the size distribution of the scattering particles and depends on κ v , and e is the Euler number.…”

“…By observing (43), it is very challenging to derive its analytical solution. However, it is found that there is a 'function' in the form of 'x ln x' on the left side of the equations above, and it can be replaced by a polynomial derived by curve fitting.…”

A Review on UAV Wireless Charging: Fundamentals, Applications, Charging Techniques and Standards

“…Their studies concentrated on developing low EMF concentrated charger with reduced higher-order harmonics. In a much simpler approach, Yan et al [46] achieved an efficiency of 62.44% at 162 kHz to transfer 65.77 W of energy using an asymmetrical coupling coil that could transfer power efficiently even with 30 mm lateral displacement. In this study, the author addressed the need for high-quality factor to tackle the misalignment problem between the loosely coupled coils.…”

Design and Optimization for Uav-enabled Two-way Relaying System With Swipt

“…Recently, unmanned aerial vehicles (UAVs) have received dramatical attentions in wireless communication networks since they have the capability of flexible mobility [1][2][3][4]. Compared to traditional wireless terminals, UAVs can be regarded as mobile relays or base stations.…”