Optimal design of a wireless power transfer system with multiple self-resonators for an LED TV

Kim, Jin-Wook; Son, Hyeon-Chang; Kim, Do-Hyeon; Park, Youngjin

doi:10.1109/tce.2012.6311317

Cited by 140 publications

(74 citation statements)

References 13 publications

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“…1 is used as a reference system in this paper. It is designed as a simple 4-coil-system similar to those described in Kurs et al (2007); Kim et al (2012Kim et al ( , 2013; Cheon et al (2011) and Awai et al (2010). Additionally to the resonant coil, a single turn coupling coil is used on both source and load side to form an impedance matching network described in Sect.…”

Section: Prototype Measurements Parameter Extraction and System Modementioning

confidence: 99%

“…Typical experimental implementations to decrease the channel variation make use of additional impedance matching networks attached to the transfer system (Beh et al, 2013;Waters et al, 2012;Sample et al, 2013) or several switchable coupling coils (Kim et al, 2012). Especially (Sample et al, 2013) shows, that this impedance matching network adds additional resonant peaks in between the resonators main peaks, thus providing the possibility to transfer energy at a fixed frequency.…”

Section: Channel Adaptionmentioning

confidence: 99%

“…The nearfield coupling of resonating inductors promises the possibility to transfer an amount of energy over a mid-range distance quite efficiently compared to farfield approaches. Important aspects regarding the design of such a system have been in the focus of recent research, like coil design by Kim et al (2012) and Lee et al (2013), impedance match by Sample et al (2010) and Cheon et al (2011), coupled resonator's passband dependency on transfer distance by Sample et al (2010) and Zhang et al (2014) et cetera. So far, WPT systems have been described and investigated in depth, and solutions to overcome certain issues have been presented.…”

Section: Introductionmentioning

confidence: 99%

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Investigations and system design for simultaneous energy and data transmission through inductively coupled resonances

Schmidt¹,

Fuentes²,

Buchholz³

2015

Adv. Radio Sci.

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Abstract. Wireless Power Transfer (WPT) with simultaneous data transmission through coupled magnetic resonators is investigated in this paper. The development of this system is dedicated to serve as a basis for applications in the field of Ambient Assisted Living (AAL), for example tracking vital parameters remotely, charge and control sensors and so on. Due to these different scenarios we consider, it is important to have a system which is reliable under the circumstance of changing positioning of the receiving device. State of the art radio systems would be able to handle this. Nevertheless, energy harvesting from far field sources is not sufficient to power the devices additionally on mid-range distances. For this reason, coupled magnetic resonant circuits are proposed as a promising alternative, although suffering from more complex positioning dependency.Based on measurements on a simple prototype system, an equivalent circuit description is used to model the transmission system dependent on different transmission distances and impedance matching conditions. Additionally, the simulation model is used to extract system parameters such as coupling coefficients, coil resistance and self-capacitance, which cannot be calculated in a simple and reliable way.Furthermore, a mathematical channel model based on the schematic model has been built in MATLAB © . It is used to point out the problems occurring in a transmission system with variable transmission distance, especially the change of the passband's centre frequency and its bandwidth. Existing solutions dealing with this distance dependent behaviour, namely the change of the transmission frequency dependent on distance and the addition of losses to the resonators to increase the bandwidth, are considered as not inventive. First, changing the transmission frequency increases the complexity in the data transmission system and would use a disproportional total bandwidth compared to the actually available bandwidth. Additionally, adding losses causes a decrease in the energy transmission efficiency.Based on these facts, we consider a system that changes the channel itself by tuning the resonant coils in a way that the passband is always at a fixed frequency. This would overcome the previously described issues, and additionally could allow for the possibility to run several independent transmission systems in parallel without disturbing each other.

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Section: Prototype Measurements Parameter Extraction and System Modementioning

confidence: 99%

Section: Channel Adaptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigations and system design for simultaneous energy and data transmission through inductively coupled resonances

Schmidt¹,

Fuentes²,

Buchholz³

2015

Adv. Radio Sci.

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show abstract

“…WPT Systems proposed in [29][30][31] consist of one source coil, multiple self-resonators and one load coil. A WPT system with four resonant coils is presented in [29], which is designed and implemented for the power supply of micro-implantable medical sensors.…”

Section: Introductionmentioning

confidence: 99%

A Novel WPT System Based on Dual Transmitters and Dual Receivers for High Power Applications: Analysis, Design and Implementation

Mai

Lin

et al. 2017

Energies

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Traditional Wireless Power Transfer (WPT) systems only have one energy transmission path, which can hardly meet the power demand for high power applications, e.g., railway applications (electric trains and trams, etc.) due to the capacity constraints of power electronic devices. A novel WPT system based on dual transmitters and dual receivers is proposed in this paper to upgrade the power capacity of the WPT system. The reliability and availability of the proposed WPT system can be dramatically improved due to the four energy transmission paths. A three-dimensional finite element analysis (FEA) tool ANSYS MAXWELL (ANSYS, Canonsburg, PA, USA) is adopted to investigate the proposed magnetic coupling structure. Besides, the effects of the crossing coupling mutual inductances among the transmitters and receivers are analyzed. It shows that the same-side cross couplings will decrease the efficiency and transmitted power. Decoupling transformers are employed to mitigate the effects of the same-side cross couplings. Meanwhile, the output voltage in the secondary side can be regulated at its designed value with a fast response performance, and the system can continue work even with a faulty inverter. Finally, a scale-down experimental setup is provided to verify the proposed approach. The experimental results indicate that the proposed method could improve the transmitted power capacity, overall efficiency and reliability, simultaneously. The proposed WPT structure is a potential alternative for high power applications.

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“…Magnetically-coupled resonant wireless power transfer (referred to MCR-WPT as below) has attracted a great attention because it's safe, clean and convenient; it has been applied broadly in variety of applications such as wireless sensor networks [1], human implantable medical devices [2,3], RFID tag [4], no-tail TV [5], mobile phone [6] and electric vehicle [7,8]. In recent years, MCR-WPT applications with multiple loads [9, 10] have gradually become a new research hotspot.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional multidirectional inductance coil owning environmental conformal feature for wireless power transfer

Luo

Zhong

Feng

et al. 2015

IEICE Electron. Express

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For wireless power transfer (WPT) application with multi-load or multi-repeater, the system must need some inductance coil possessing the characteristic of transmitting power to multiple directions. This paper proposes a novel three-dimensional hexagon coil with simple structure, which is fabricated conveniently and easy to conformal with surrounding environment. The formula to calculate self-and mutual-inductances for the coil are given with the direction feature also introduced. Furthermore, numerical simulations and experimental results show mutual inductance is very stable in a wide scope of direction angle, to be applied in WPT with multidirectional transmission characteristics.

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Optimal design of a wireless power transfer system with multiple self-resonators for an LED TV

Cited by 140 publications

References 13 publications

Investigations and system design for simultaneous energy and data transmission through inductively coupled resonances

Investigations and system design for simultaneous energy and data transmission through inductively coupled resonances

A Novel WPT System Based on Dual Transmitters and Dual Receivers for High Power Applications: Analysis, Design and Implementation

Three-dimensional multidirectional inductance coil owning environmental conformal feature for wireless power transfer

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