Wireless Power Transfer System with an Asymmetric 4-Coil Resonator for Electric Vehicle Battery Chargers

Moon, SangCheol; Moon, Gun-Woo

doi:10.1109/tpel.2015.2506779

Cited by 122 publications

(74 citation statements)

References 30 publications

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“…Optimization of the dimensions of circular coils for high efficiency and tolerance to misalignments is addressed in [56]. Three coil and four coil structures are also less sensitive to gap variation and misalignments [57][58][59].…”

Section: Design Of the Coil Systemmentioning

confidence: 99%

Review on Contactless Power Transfer for Electric Vehicle Charging

Ravikiran

Keshri

2017

Energies

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Abstract:For the past few years the feasibility of contactless power transfer (CPT) is being explored extensively as a future solution for charging electric vehicles (EVs). Studies report that the main obstacles in CPT are low power efficiency, misalignment tolerance, cost, range and charging time anxiety. This paper presents a review based on existing literature of the CPT systems for EV charging. Different cases of CPT technologies, their principle of operation and equivalent circuit based analysis is carried out. A discussion on compensation strategies and their effectiveness are reviewed and discussed. The design of coil systems for some city electric cars has been referenced in general. At the end recommendations and conclusions are made based on the study and analysis of the information available in literature.

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Section: Design Of the Coil Systemmentioning

confidence: 99%

Review on Contactless Power Transfer for Electric Vehicle Charging

Ravikiran

Keshri

2017

Energies

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“…In situations of high misalignment or distance between the emitter and receiver coils, the use of intermediate resonators [4][5][6][7][8][9][10] can increase the efficiency of these systems and make it possible to transmit power over longer distances. These resonators can be arranged in arrays on a plane with parallel axes, or in a domino configuration.…”

Section: Introductionmentioning

confidence: 99%

Fast Calculation and Analysis of the Equivalent Impedance of a Wireless Power Transfer System Using an Array of Magnetically Coupled Resonators

Alberto¹,

Reggiani²,

Sandrolini³

et al. 2018

PIER B

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Abstract-In this paper the equivalent impedance of resonator arrays for wireless power transfer systems is obtained in closed-form from a continued fraction expression. Using the theory of difference equations, the continued fraction is described as the general term of a complex sequence defined by recurrence, and its convergence is analyzed. It is shown that the equivalent impedance can be easily found in closed-form in terms of the system parameters. In this way, the obtained closed-form expressions may help electrical engineers to quickly predict the behaviour of a system with the changes of its parameters. Some numerical examples of the theoretical results are given and discussed. Finally, the analytical formulae obtained in this work are validated with measurements and a good agreement is observed.

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“…The magnetic resonant coupling wireless power transfer (MRC-WPT) was first proposed by MIT's team in 2007 [1] and is now gaining more spotlights ranging from contactless battery charging of consumer electronics [2], electric vehicles [3][4][5], to biological implanted devices' power supply [6,7].…”

Section: Introductionmentioning

confidence: 99%

An improved three-coil wireless power link to increase spacing distance and power for magnetic resonant coupling system

Zhang

Meng

Wei

et al. 2018

J Wireless Com Network

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When wireless power transfer (WPT) technology is used to power the sensor networks, it is necessary to increase the transmission power and distance. We strictly deduced two necessary conditions for strong coupling by coupled mode theory. Next, the transmission power and efficiency as a function of coupling coefficient and quality factor are derived, and the maximum active power of the load depends on the coupling coefficient between resonators, quality factor of the resonator and the drive power. In order to increase transmission power and distance, an improved three-coil wireless power link is proposed. Meanwhile, an experimental platform was established, and the experimental results show that the transmission power can reach 120 W at a distance of 2.5 m. This proves that the improved three-coil wireless power link is very effective.

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Wireless Power Transfer System with an Asymmetric 4-Coil Resonator for Electric Vehicle Battery Chargers

Cited by 122 publications

References 30 publications

Review on Contactless Power Transfer for Electric Vehicle Charging

Review on Contactless Power Transfer for Electric Vehicle Charging

Fast Calculation and Analysis of the Equivalent Impedance of a Wireless Power Transfer System Using an Array of Magnetically Coupled Resonators

An improved three-coil wireless power link to increase spacing distance and power for magnetic resonant coupling system

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