Correction to “Efficiency Analysis of Magnetic Resonance Wireless Power Transfer With Intermediate Resonant Coil”

Kim, Jin-Wook; Son, Hyeon-Chang; Kim, Kwan-Ho; Park, Youngjin

doi:10.1109/lawp.2011.2178876

Cited by 87 publications

(93 citation statements)

References 1 publication

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“…where a i -common mode amplitude of Tx and Rx; k -coupling coefficient Tx to Rx; x -virtual or relative decay rate, Rx as a load; The mutual inductance between two resonant tuned coils of almost identical geometry becomes a function of the distance separating the coils (2). Therefore, we look to find the most beneficial mutuality (3) between Tx and Rx, which, in an ideal system, would be as in the series or parallel equations denoted in (4), creating a system, where mutual impedance and mutual resistance may be minimal.…”

Section: Section 2a: Methodology -Wireless Power Transfer Systemmentioning

confidence: 99%

“…The arrays of emitters and phototransistors are fully tuned and therefore not subject to ambient influence. At any moment there is ignition of two Tx coils due to the configuration of switching arrays, so that as the robot passes from one coil to the next, the preceding coil will continue to propagate energy to the next coil, as is the case with intermediate resonant coils, and according to the temporal coupled mode theory (CMT), the intermediate system power transfer efficiency has been shown to be improved considerably in the cases of not only a coaxially arranged intermediate system, but also a perpendicularly arranged intermediate system [2]. Together this institutes a form of energy "softstart", which is beneficial to long term battery charging configurations.…”

Section: Fig 1 Conveyor Pathway: Simplified Schemamentioning

confidence: 99%

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Potential for improving operational efficiency of robotic systems utilizing cost effective core-less wireless charging systems

Adrian¹,

Rubenis

2018

Engineering for Rural Development

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Abstract. Industrial Service Hybrid robots (ISH) are becoming increasingly popular and are finding many applications in both domestic and semi industrial areas. One important example is the use of robots within storage facilities attending to the mundane tasks of product movement, placement and retrieval at both large and small warehouse facilities. Of particular interest is the downtime of the robot when undergoing a recharge cycle. The time consumed during charging varies according to the battery type and this time may be categorized as being both non-productive and inconvenient especially to small storage facilities, where a minimal amount of robots have been purchased to perform the tasks. Therefore, there is a need for total autonomy of the ISHs and the proposed solution is wireless power transfer (WPT) that can render the charging of mobile robots autonomous by removing the requirement for downtime for charging. In this research, a complete WPT charging system has been developed for dynamic recharging of mobile robotic platforms. The system includes primary power conversion, magnetic coupling methodology, transmitter and receiver overview and describes a new lowcost coreless transmitter technology, which is easily installed and more suitable for the smaller business owner, yet also capable of operation in bulk storage locations. The design of this WPT charging system is presented as a fully controlled and dynamic solution for mobile robots. Within the paper, analytical and experimental results are presented.

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Section: Section 2a: Methodology -Wireless Power Transfer Systemmentioning

confidence: 99%

Section: Fig 1 Conveyor Pathway: Simplified Schemamentioning

confidence: 99%

Potential for improving operational efficiency of robotic systems utilizing cost effective core-less wireless charging systems

Adrian¹,

Rubenis

2018

Engineering for Rural Development

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“…The coils number is another degree of freedom to enhance the power transfer distance. The use of a third intermediate resonant coil is reported in [15]. Four coils make a popular wireless power transfer architecture consisting of driver coil, transmitter coil, receiver coil and load coil [16], this architecture is space demanding and also suffers from high sensitivity to the design parameters which lead to more design complexity, such as tuning the distance between both transmitter coils (driver and transmitter coils) or tuning the resonance frequency of the system [17].The available space, the transfer distance rate, the level of power to be transferred and the system efficiency are the main requirements for the design of such systems.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental study of a wireless power supply system for moving low power devices in ferromagnetic and conductive medium

Salaheddine

Bernard

2017

Eur. Phys. J. Appl. Phys.

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Abstract. This paper focuses on the design of a wireless power supply system for low power devices (e.g. sensors) located in harsh electromagnetic environment with ferromagnetic and conductive materials. Such particular environment could be found in linear and rotating actuators. The studied power transfer system is based on the resonant magnetic coupling between a fixed transmitter coil and a moving receiver coil. The technique was utilized successfully for rotary machines. The aim of this paper is to extend the technique to linear actuators. A modeling approach based on 2D Axisymmetric Finite Element model and an electrical lumped model based on the two-port network theory is introduced. The study shows the limitation of the technique to transfer the required power in the presence of ferromagnetic and conductive materials. Parametric and circuit analysis were conducted in order to design a resonant magnetic coupler that ensures good power transfer capability and efficiency. A design methodology is proposed based on this study. Measurements on the prototype show efficiency up to 75% at a linear distance of 20 mm.

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“…Further, when the system works in the sub-mega-hertz for mid-range WPT, coils fabricated from metamaterial are very expensive [12]. In an effort to resolve transmission distance and efficiency issues, the effects of relay coil was first proposed by Kim et al [13]. As the distance of the receiving coil from the transmitting coil increases, the relay coil can more effectively enhance the transmission efficiency of the system [14].…”

Section: Introductionmentioning

confidence: 99%

A novel dumbbell-shaped coil featured with cross coupling suppression for long distance relay wireless power transfer applications

Zhang

Luo

et al. 2017

IEICE Electron. Express

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The use of multi-resonators for medium-range wireless power transfer (WPT) systems is an important concern; the cross-couplings between non-adjacent coils have an adversely impact on the transmission distance and efficiency of the system. This paper proposes a dumbbell-shaped (DS) coil in a WPT system. The DS coil structure was analyzed theoretically and verified experimentally. The proposed scheme eliminates cross-couplings between non-adjacent coils in the multiple resonator system to resolve frequency drift, and improve the transmission distance and efficiency in the multiple resonator system. The scheme features a coplanar structure which can secure direct-coupling and save space when applied in the home, office, and public areas.

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Correction to “Efficiency Analysis of Magnetic Resonance Wireless Power Transfer With Intermediate Resonant Coil”

Cited by 87 publications

References 1 publication

Potential for improving operational efficiency of robotic systems utilizing cost effective core-less wireless charging systems

Potential for improving operational efficiency of robotic systems utilizing cost effective core-less wireless charging systems

Theoretical and experimental study of a wireless power supply system for moving low power devices in ferromagnetic and conductive medium

A novel dumbbell-shaped coil featured with cross coupling suppression for long distance relay wireless power transfer applications

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