Advanced Power Control Scheme in Wireless Power Transmission for Human Protection From EM Field

Kim, Seong-Min; Moon, Jung-Ick; Cho, In-Kui; Yoon, Jae-Hun; Byun, Woo-Jin; Choi, Hyun-Chul

doi:10.1109/tmtt.2015.2398444

Cited by 16 publications

(6 citation statements)

References 15 publications

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“…At the distance 20 cm from the front side of the robot, the averaged value of the magnetic field strength at the height of 0.3, 0.6, 0.9 m from ground was 0.190 A/m [9]. In our calculation, it was predicted as 0.189 A/m as depicted in Figure 2.…”

Section: Electromagnetic Field Dsistributionmentioning

confidence: 55%

Shielding for reduction of magnetic field strength from docent robot being charged by wireless power transfer technology

Kim

Moon

et al. 2015

2015 IEEE Global Electromagnetic Compatibility Conference (GEMCCON)

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This paper presents the evaluation result of a shielding technique applied to a docent robot system which uses wireless power transfer (WPT) technology to charge its embedded battery. In this study, several shielding techniques were investigated such as passive, active, and reactive shield and the most suitable shielding method for robot system was described. The proposed technique using shield coil which encloses the Tx coil reduced the leakage magnetic field strength by 43 % comparing with when the shield is not applied.

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Section: Electromagnetic Field Dsistributionmentioning

confidence: 55%

Shielding for reduction of magnetic field strength from docent robot being charged by wireless power transfer technology

Kim

Moon

et al. 2015

2015 IEEE Global Electromagnetic Compatibility Conference (GEMCCON)

Self Cite

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“…Therefore, there is a need for a comprehensive study to investigate the shield characteristics and to optimize the shield design for suppressing the EMF while minimizing the shield loss. This is a crucial point widely addressed in the literature [72][73][74][75][76][77][78][79][80].…”

Section: Shieldingmentioning

confidence: 95%

Electromagnetic analysis and simulation aspects of wireless power transfer in the domain of inductive power transmission technology

Pichon

2020

Journal of Electromagnetic Waves and Applications

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Wireless power transfer (WPT) technologies have now reached a commercial stage in applications going from consumer electronics, biomedical implants and domestic applications. For electrical cars, WPT offers some new opportunities compared to classical wired charging. Although there exist some commercial cars equipped with wireless charging system, improving design procedures needs to address various domains including power electronics, components and electromagnetics. The magnetic coupling system is a key component of wireless power transfer: the coils and surrounding materials have a great impact on the efficiency of the transfer as well as the level of the stray field near the system. The paper aims to present three essential features regarding the inductive power transfer dedicated to electric vehicles. The first one addresses the topology and efficiency of the coupling system, the second one underlines the human exposure considerations and the third one deals with the impact of uncertainties regarding system parameters.

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“…Magnetically coupled resonant (MCR) wireless power transfer (WPT) technique has explosively developed over the last decade, and its utilisation has been applied to a broad range of applications, including cell phones and portable devices [1–3], wireless sensor networks [4, 5], unmanned air vehicles [6, 7], robots [8, 9], electrical vehicles [10, 11], biological implants [12, 13] and so on. In addition, the Wi‐Fi‐power technique or WPT with spatial freedom is getting more and more attention [14].…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional rotatable omnidirectional MCR WPT systems

Li¹,

Wang²,

Wang³

et al. 2020

IET Power Electronics

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Recently, Wi-Fi wireless power transfer (WPT) has attracted increasing attention. In this study, a rotatable threedimensional (3D) transmitter (Tx) is first designed which only needs to be powered by a single source without current amplitude or phase control. Mutual inductance formulas of the Tx and a receiver (Rx) during the Tx's 3D rotation are derived based on Biot-Savart law and rotating matrix, and the maximum coupling areas are obtained. A method of achieving equal coupling of Rxs with the Tx which simultaneously charges two Rxs is proposed. A real rotatable 3D Tx and an omnidirectional magnetically coupled resonant (MCR) WPT prototype are fabricated, and the theoretical analysis is verified by simulation and experiment. Experiment displays that the maximum or desired coupling of single or two Rxs in 3D space can be obtained by calculated rotation combinations. The maximum power transfer efficiency (PTE) of the system can reach 90.2% with the transmission distance of 1.5 times the radius of Tx. Finally, the PTE can be maintained at 73% with the transmission distance varying from 18 to 27 cm by a novel method. The proposed 3D technique could be applied to many fields including Wi-Fi WPT home devices, remote sensing and some mechanical systems.

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Advanced Power Control Scheme in Wireless Power Transmission for Human Protection From EM Field

Cited by 16 publications

References 15 publications

Shielding for reduction of magnetic field strength from docent robot being charged by wireless power transfer technology

Shielding for reduction of magnetic field strength from docent robot being charged by wireless power transfer technology

Electromagnetic analysis and simulation aspects of wireless power transfer in the domain of inductive power transmission technology

Three‐dimensional rotatable omnidirectional MCR WPT systems

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