scholarly journals Efficient Wireless Drone Charging Pad for Any Landing Position and Orientation

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8188
Author(s):  
Tommaso Campi ◽  
Silvano Cruciani ◽  
Francesca Maradei ◽  
Mauro Feliziani
Keyword(s):  
Power Transmission ◽  
Three Dimensional ◽  
Base Station ◽  
Landing Gear ◽  
Wireless Power ◽  
Landing Position ◽  
Landing Point ◽  
Charging Station ◽  
Receiving Coil ◽  
Position And Orientation

A wireless charging pad for drones based on resonant magnetic technology to recharge the internal battery is presented. The goal of the study was to design a robust, reliable and efficient charging station where a drone can land to automatically recharge its battery. The components of the wireless power transfer (WPT) system on board the drone must be compact and light in order not to alter the payload of the drone. In this study, the non-planar receiving coil of the WPT system is integrated into the drone’s landing gear while the transmitting pad is designed to be efficient for any landing point and orientation of the drone in the charging pad area. To meet these requirements, power transmission is accomplished by an array of planar coils integrated into the ground base station. The configuration of the WPT coil system, including a three-dimensional receiving coil and a multicoil transmitter, is deeply analyzed to evaluate the performance of the WPT, considering potential lateral misalignment and rotation of the receiving coil due to imprecise drone landing. According to the proposed configuration, the battery of a light drone (2 kg in weight and 0.5 kg in payload) is recharged in less than an hour, with an efficiency always greater than 75%.

scholarly journals ANALYSIS OF CONNECTION WAY OF A THREE-DIMENSIONAL RECEIVING COIL ONBOARD A CAPSULE ROBOT FOR WIRELESS POWER TRANSMISSION

2019 ◽  
Vol 78 ◽  
pp. 39-48
Author(s):  
Jinyang Gao ◽  
Guozheng Yan ◽  
Yunbo Shi ◽  
Huiliang Cao ◽  
Kun Huang ◽  
...  
Keyword(s):  
Power Transmission ◽  
Three Dimensional ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Receiving Coil ◽  
Capsule Robot

scholarly journals SWIPT in mMIMO system with non-linear energy-harvesting terminals: protocol design and performance optimization

2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Kui Xu ◽  
Ming Zhang ◽  
Jie Liu ◽  
Nan Sha ◽  
Wei Xie ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Performance Optimization ◽  
Power Transmission ◽  
Base Station ◽  
Second Phase ◽  
Wireless Power ◽  
Half Duplex ◽  
Non Linear ◽  
Two Phases ◽  
And Performance

Abstract In this paper, we design the simultaneous wireless information and power transfer (SWIPT) protocol for massive multi-input multi-output (mMIMO) system with non-linear energy-harvesting (EH) terminals. In this system, the base station (BS) serves a set of uplink fixed half-duplex (HD) terminals with non-linear energy harvester. Considering the non-linearity of practical energy-harvesting circuits, we adopt the realistic non-linear EH model rather than the idealistic linear EH model. The proposed SWIPT protocol can be divided into two phases. The first phase is designed for terminals EH and downlink training. A beam domain energy beamforming method is employed for the wireless power transmission. In the second phase, the BS forms the two-layer receive beamformers for the reception of signals transmitted by terminals. In order to improve the spectral efficiency (SE) of the system, the BS transmit power- and time-switching ratios are optimized. Simulation results show the superiority of the proposed beam-domain SWIPT protocol on SE performance compared with the conventional mMIMO SWIPT protocols.

scholarly journals Development of Intelligent Drone Battery Charging System Based on Wireless Power Transmission Using Hill Climbing Algorithm

2018 ◽  
Vol 1 (4) ◽  
pp. 44 ◽  
Author(s):  
Ali Rohan ◽  
Mohammed Rabah ◽  
Muhammad Talha ◽  
Sung-Ho Kim
Keyword(s):  
Power Transmission ◽  
Inductive Coupling ◽  
Hill Climbing ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Battery Charging ◽  
Charging System ◽  
Charging Station ◽  
Hill Climbing Algorithm ◽  
The Poor

In this work, an advanced drone battery charging system is developed. The system is composed of a drone charging station with multiple power transmitters and a receiver to charge the battery of a drone. A resonance inductive coupling-based wireless power transmission technique is used. With limits of wireless power transmission in inductive coupling, it is necessary that the coupling between a transmitter and receiver be strong for efficient power transmission; however, for a drone, it is normally hard to land it properly on a charging station or a charging device to get maximum coupling for efficient wireless power transmission. Normally, some physical sensors such as ultrasonic sensors and infrared sensors are used to align the transmitter and receiver for proper coupling and wireless power transmission; however, in this system, a novel method based on the hill climbing algorithm is proposed to control the coupling between the transmitter and a receiver without using any physical sensor. The feasibility of the proposed algorithm was checked using MATLAB. A practical test bench was developed for the system and several experiments were conducted under different scenarios. The system is fully automatic and gives 98.8% accuracy (achieved under different test scenarios) for mitigating the poor landing effect. Also, the efficiency η of 85% is achieved for wireless power transmission. The test results show that the proposed drone battery charging system is efficient enough to mitigate the coupling effect caused by the poor landing of the drone, with the possibility to land freely on the charging station without the worry of power transmission loss.

scholarly journals Position and Orientation Insensitive Wireless Power Transmission for EnerCage-Homecage System

2017 ◽  
Vol 64 (10) ◽  
pp. 2439-2449 ◽  
Author(s):  
Yaoyao Jia ◽  
S. Abdollah Mirbozorgi ◽  
Zheyuan Wang ◽  
Chia-Chun Hsu ◽  
Teresa E. Madsen ◽  
...  
Keyword(s):  
Power Transmission ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Position And Orientation

scholarly journals Innovative Design of Drone Landing Gear Used as a Receiving Coil in Wireless Charging Application

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3483 ◽  
Author(s):  
Tommaso Campi ◽  
Silvano Cruciani ◽  
Francesca Maradei ◽  
Mauro Feliziani
Keyword(s):  
Near Field ◽  
Base Station ◽  
Electrical Circuit ◽  
Design Guidelines ◽  
Landing Gear ◽  
Electrical Performance ◽  
Secondary Coil ◽  
Wireless Power ◽  
Innovative Solution ◽  
Aluminum Pipe

A near-field wireless power transfer (WPT) technology is applied to recharge the battery of a small size drone. The WPT technology is an extremely attractive solution to build an autonomous base station where the drone can land to wirelessly charge the battery without any human intervention. The innovative WPT design is based on the use of a mechanical part of the drone, i.e., landing gear, as a portion of the electrical circuit, i.e., onboard secondary coil. To this aim, the landing gear is made with an adequately shaped aluminum pipe that, after suitable modifications, performs both structural and electrical functions. The proposed innovative solution has a very small impact on the drone aerodynamics and the additional weight onboard the drone is very limited. Once the design of the secondary coil has been defined, the configuration of the WPT primary coil mounted in a ground base station is optimized to get a good electrical performance, i.e., high values of transferred power and efficiency. The WPT design guidelines of primary and secondary coils are given. Finally, a demonstrator of the WPT system for a lightweight drone is designed, built, and tested.

scholarly journals Multiplexed Supply of a MISO Wireless Power Transfer System for Battery-Free Wireless Sensors

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1244
Author(s):  
Ghada Bouattour ◽  
Mohamed Elhawy ◽  
Slim Naifar ◽  
Christian Viehweger ◽  
Houda Ben Jmaa Derbel ◽  
...  
Keyword(s):  
Power Transmission ◽  
The Novel ◽  
Wireless Power ◽  
Single Output ◽  
Novel Approach ◽  
Single Coil ◽  
Communication Module ◽  
Wireless Power Transfer System ◽  
Receiving Coil ◽  
Secondary Side

Multi-input single output wireless power transmission (MISO-WPT) systems have decisive advantages concerning flexible receiver position in comparison to single coil systems. However, the supply of the primary side brings a large uncertainty in case of variable positions of the secondary side. In this paper, a compact multiplexed primary side electronic circuit is proposed, which includes only one signal generator, a passive peak detector, a communication module, and a compensation capacitor. The novel approach has been studied and evaluated for a MISO-WPT system having a 16 coils on primary side and one coil on secondary side having the double diameter. Results show that a standard microcontroller, in this case an STM32, is sufficient for the control of the whole system, so that the costs and the energy consumption are significantly reduced. An activation strategy has been proposed, which allows to determine the optimal transmitting coil for each position of the receiving coil and to switch it on. The time-to-start-charging at different positions of the receiving coil and different number of neighbors has been determined. It remains in all cases under 2.5 s.

scholarly journals Optimization Design for Receiving Coil with Novel Structure Based on Mutual Coupling Model in Wireless Power Transmission for Capsule Endoscope

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6460
Author(s):  
Shuai Kuang ◽  
Guozheng Yan ◽  
Zhiwu Wang
Keyword(s):  
Optimization Design ◽  
Power Transmission ◽  
Biological Tissues ◽  
Mutual Inductance ◽  
Power Measurement ◽  
Capsule Endoscope ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Sufficient Power ◽  
Receiving Coil

Wireless capsule endoscope (WCE) is a promising technology for noninvasive and painless imaging detection on gastrointestinal (GI) diseases. On the other hand, conventional endoscopes with wires could discomfort patients and cause them to vomit and aerosolize coronavirus if the patients are infected with COVID-19. However, there stands a technical bottleneck on power supply for the WCE. With the help of wireless power transmission technology, a hollow receiving coil (RC) is proposed to supply sufficient power and also minimize the size of WCE. A model on mutual inductance between transmitting and receiving coils is proposed to evaluate receiving power when the RC is in a different position and direction of patient’s GI tract. Based on the model, an optimal RC is built to obtain sufficient and stable power. Measurement of mutual inductance with the optimal RC validates high accuracy of the proposed model. The standard deviation of receiving power is very low. WCE with optimum RC gets sufficient power and captures images stably in live pig’s intestine tract. Additionally, the model is little affected by biological tissues. It ensures reliable performance of WCE and makes popular clinical application of WCE possible, which is also a relief to reduce epidemics like COVID-19.

scholarly journals Free-Positioning Wireless Power Transfer Using a 3D Transmitting Coil for Portable Devices

2020 ◽  
Vol 20 (4) ◽  
pp. 270-276
Author(s):  
Nam Ha-Van ◽  
Hoang Le-Huu ◽  
Minh Thuy Le ◽  
Kwangsuk Park ◽  
Chulhun Seo
Keyword(s):  
Three Dimensional ◽  
Wireless Power Transfer ◽  
Receiver Coil ◽  
Portable Devices ◽  
Power Transfer ◽  
Wireless Power ◽  
Transfer Energy ◽  
Resonant Coupling ◽  
Power Transfer Efficiency ◽  
Receiving Coil

The free-positioning wireless power transfer (WPT) system has drawn attention in recent years. Traditionally, a WPT system can transfer energy in one or two directions on the same plane, but it leads the restrictions of angle and axis misalignment between a transmitter and a receiver coil. In this paper, we propose a free-positioning WPT system using a three-dimensional cubic-shaped transmitting coil for portable device charging. A small receiving coil is placed inside the transmitter to achieve the transferred energy through the magnetic resonant coupling. In addition, the equivalent circuit and the mutual inductance between the Tx and Rx coils are analyzed. Finally, a practical experiment is implemented to verify the transfer performance, which can reach up to about 50% power transfer efficiency. The proposed system can charge in spatial freedom.

scholarly journals A Novel Three-Dimensional Beamforming Antenna Array for Wireless Power Focusing

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Mohammad A. Safar ◽  
Ayman S. Al-Zayed
Keyword(s):  
Antenna Array ◽  
Power Transmission ◽  
Three Dimensional ◽  
Wireless Power ◽  
Dipole Antennas ◽  
Multiple Points ◽  
Additional Degree ◽  
Points Of Interest ◽  
Power Transfer Efficiency ◽  
Array Structure

An antenna array capable of focusing the power transmitted to a specified point in space is modeled and simulated. This array will serve best for wireless power transmission applications where one of the goals is to maximize the power transfer efficiency. The array consists of 100 dipole antennas with each antenna transmitting a sum of 50 signals where each signal has a different frequency. This difference in frequency gives an additional degree of freedom that allows the overall beam pattern to be focused to a point in space instead of just a direction. The same array structure is also capable of transmitting power to multiple points in space which is promising when it comes to powering multiple points of interest.

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