Abstract
Inductive power transfer (IPT) is an optimal way for the unmanned aerial vehicle (UAV) wireless charging. The magnetic coupler is the key component in the IPT system, which determines the power transmission capacity and efficiency in IPT system. Due to the particularity of UAV application, the magnetic field height should be strictly limited to avoid the damage caused by high frequency magnetic field heat the UAV's metal equipment. A cross-type magnetic coupler with receiving coil placed on UAV's one landing gear was proposed to solve this problem, but it has the possibility of making UAV fuselage imbalance. Therefore, a novel cross-type magnetic coupler is proposed to overcome its difficulties in this paper, and most of magnetic fields are restrained to be lower than UAV's landing gear height h 1 = 145mm, which will not cause damage to the UAV's equipment. And a simple and practical iterative method for designing the magnetic coupler geometry parameters is proposed, with simplification of the complex design process for the finite element analysis, improves the design efficiency. The experimental results show that the system can charge the 260W UAV normally with the system efficiency of 91.577% within the misalignment range of X-axis direction 25mm, Y-axis direction 40mm and rotation 25.
Highlights
Unmanned aerial vehicle (UAV) is an aircraft that is controlled by a radio real-time remote control or stored program in advance by itself, capable of carrying multiple functional devices to perform various tasks
The manual plug is mainly used to charge the UAV. This way has some shortcomings in flexibility, convenience, etc, which reduces the UAV’s operation scope, The associate editor coordinating the review of this manuscript and approving it for publication was Ton Do
In contrast to current achievements, a novel cross-type magnetic coupler is proposed in this paper, the main merits of the developed scheme can be summed up as follows: 1) A cross-type magnetic coupler proposed in this paper is proposed, which avoid the influence of high frequency magnetic field on UAV’s internal equipment; 2) The magnetic circuit and electric circuit model are established, and a simple and practical iterative method for designing the magnetic coupler geometry parameters is proposed, with simplification of the complex design process, improves the design efficiency
Summary
Unmanned aerial vehicle (UAV) is an aircraft that is controlled by a radio real-time remote control or stored program in advance by itself, capable of carrying multiple functional devices to perform various tasks. Due to limitation of UAV’s capacity and landing accuracy, it is important to design a magnetic coupler with strong coupling capability, strong misalignment tolerance and ensure its receiver pad is of small size and light weight. In contrast to current achievements, a novel cross-type magnetic coupler is proposed in this paper, the main merits of the developed scheme can be summed up as follows: 1) A cross-type magnetic coupler proposed in this paper is proposed, which avoid the influence of high frequency magnetic field on UAV’s internal equipment; 2) The magnetic circuit and electric circuit model are established, and a simple and practical iterative method for designing the magnetic coupler geometry parameters is proposed, with simplification of the complex design process, improves the design efficiency. The Q2 is less than 10 generally to improve the system voltage transmission ratio and maintain the system stability [19], so it is constrained to 2-5 in this paper
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