Magnetic field levels in drones equipped with Wireless Power Transfer technology

Campi, Tommaso; Dionisi, Fabiola; Cruciani, Silvano; Santis, Valerio De; Feliziani, M.; Maradei, F.

doi:10.1109/apemc.2016.7522793

Cited by 62 publications

(43 citation statements)

References 6 publications

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“…In a previous work [14], the on-board coil has been placed under the drone frame. Such a solution permits the installation of the coil without interfering with the payload, but the air gap between the ground and the on-board coil is relevant (typically much more than 100 mm).…”

Section: System Configurationmentioning

confidence: 99%

“…After the evaluation of the circuit lumped parameters, the compensation capacitors C1 and C2 can be obtained at the given resonance frequency for the selected compensation topology [20]. The resonant frequency of 150 kHz [14] is here adopted for this kind of application since it is commonly used for the medium power application (e.g., mobile device). This frequency allows the transfer of an adequate amount of power with good efficiency at short range.…”

Section: Wpt Equivalent Circuitmentioning

confidence: 99%

“…The major issues to recharge drone batteries by WPT systems are described in several past works [14][15][16][17][18][19]. In [14], two circular planar spiral coils have been used for both primary and secondary circuits of a WPT system, the main disadvantages of this configuration are the significant weight and dimension of the on-board components that reduce the payload of the drone. In [15], an automatic landing procedure is presented to improve the landing precision reducing the possibility of misalignment condition between the transmitting and the receiving coils.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wireless Power Transfer Technology Applied to an Autonomous Electric UAV with a Small Secondary Coil

2018

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This study deals with the design and the optimization of a wireless power transfer (WPT) charging system based on magnetic resonant coupling applied to an electric vertical take-off and landing Unmanned Aerial Vehicle (UAV). In this study, a procedure for primary and secondary coil design is proposed. The primary circuit in the ground station consists of an array of coils in order to mitigate the negative effects on the coupling factor produced by the possible misalignment between the coils due to an imperfect landing. Key aspects for the design of the secondary coil onboard the UAV are the lightness and compactness of the WPT system components. A demonstrative prototype of the WPT system is applied to a commercial drone. The WPT electrical performances are calculated and measured. Finally, an automatic battery recharge station is built where the drone can autonomously land, recharge the battery and take off to continue its flight mission.

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Section: System Configurationmentioning

confidence: 99%

Section: Wpt Equivalent Circuitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wireless Power Transfer Technology Applied to an Autonomous Electric UAV with a Small Secondary Coil

2018

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“…Its application is expanded from military to civil use [1,2], scientific research, and other fields [3][4][5]. UAV can be equipped with many payloads, such as cameras, sensors, positioning systems [6][7][8]. These loads are often powered by high energy density lithium batteries, which can only last for 20-40 min [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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

Yan

Shi

Zhang

2020

J Wireless Com Network

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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.

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“…Finally, the WPT technology must guarantee efficient power transfer even with a high a coil misalignment tolerance, which accounts for the inaccuracies of landing [22,23]. A study WPT technology presented in [24] defines a system comprising of two circular planar spiral coils, the main disadvantages of that configuration is the significant increase in weight and physical dimensions of the components used. That system reduced the payload capacity of the drone and large components compromised the aerodynamic stability of the UAV.…”

Section: Introductionmentioning

confidence: 99%

Improvement in energy conversion for unmanned aerial vehicle charging pad

AL-Obaidi

Mustafa

Hassan

et al. 2020

IJEECS

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An efficient charging station is a necessity for Unmanned Aerial Vehicle (UAV) systems. However, if that implementation adds more complexity and onboard weight, then that exercise becomes a burden rather than a benefit since UAV's engineers aim to improve efficiency by reducing the energy consumed by the software and hardware of the complete aeronautical system. This article recommends a fully automatic contact charging station for UAVs, which can charge UAVs and thus resolve flight endurance restrictions of the UAV. The ground station consists of square copper plates that are positively and negatively polarized successively in a chessboard with particular sizes to guarantee electric contact at the landing. The design methodology used with the loading station takes into account the differences in UAV orientation once the platform has landed. In addition, this innovation uses independent charging after touchdown. Thus, this technology relaxes common flight times and help to enhance general mission times. This paper presents a unique charging platform in a "chessboard" configuration, which is devised as an interconnecting interface to facilitate the charging process and overcome inaccuracies with the landing. The solution devised in this research requires few components and presents two power source options (solar & mains power). Additionally, this work presents, to the best of our knowledge, a uniquely innovative recharging landing platform, which incidentally requires no additional software or changes to the UAV's onboard software settings.

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Magnetic field levels in drones equipped with Wireless Power Transfer technology

Cited by 62 publications

References 6 publications

Wireless Power Transfer Technology Applied to an Autonomous Electric UAV with a Small Secondary Coil

Wireless Power Transfer Technology Applied to an Autonomous Electric UAV with a Small Secondary Coil

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

Improvement in energy conversion for unmanned aerial vehicle charging pad

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