Combined Conformal Strongly-Coupled Magnetic Resonance for Efficient Wireless Power Transfer

Rozman, Matjaz; Fernando, Michael; Adebisi, Bamidele; Rabie, Khaled M.; Kharel, Rupak; Ikpehai, Augustine; Gacanin, Haris

doi:10.3390/en10040498

Cited by 20 publications

(15 citation statements)

References 35 publications

(41 reference statements)

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“…In this way, the receiver, which may have more restrictions for the adjustment, do not require any control system. This restriction is also considered in [27], where K DT is varied to adapt to the changes on the position between the transmitter and the receiver. Specifically, the driver loop is selected among a set of two coils and connected to the circuit accordingly.…”

Section: Impedance Matchingmentioning

confidence: 99%

“…Conformal solutions constitute a particular case of circular coils in which the transmitter coil is in the same plane than the driver loop so that the dimensions of the transmitter equipment is reduced [27,28]. A more popular approach for conformal implementations searches the compact structure in the receiver, which may have more restrictions about the place to occupy.…”

Section: Coil Design In Scmr Systemsmentioning

confidence: 99%

See 1 more Smart Citation

A Review on the Fundamentals and Practical Implementation Details of Strongly Coupled Magnetic Resonant Technology for Wireless Power Transfer

Triviño-Cabrera

Aguado

2018

Energies

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Users are increasing their demands on the home appliances they utilize by requiring them to be powered anywhere and anytime. In order to satisfy this need, wireless power transfer helps transfer energy between objects without conductors. For domestic scenarios, strongly magnetic resonant technology offers a method to enable wireless power transfer, even when there exist intermediate non-metallic objects between the wireless power source and the load. This paper reviews this technology with a comprehensive explanation about its fundamentals and physical principles. Some practical issues are also analyzed in this work. Particularly, how the control can be designed and how the coils are built. Finally, this paper also addresses the study about the features of other technologies to power home appliances without conductors. They can be foreseen as the technological competitors of strongly coupled magnetic resonant systems.

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Section: Impedance Matchingmentioning

confidence: 99%

Section: Coil Design In Scmr Systemsmentioning

confidence: 99%

A Review on the Fundamentals and Practical Implementation Details of Strongly Coupled Magnetic Resonant Technology for Wireless Power Transfer

Triviño-Cabrera

Aguado

2018

Energies

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“…This varying magnetic field couples the coil to another coil, enabling wireless power transfer. Magnetic resonance, which uses more than two coils, is based on the same principle [6]. IWPT technology is being applied to a broad range of applications [7].…”

Section: Introductionmentioning

confidence: 99%

Optimal Analytical Solution for a Capacitive Wireless Power Transfer System with One Transmitter and Two Receivers

Minnaert

Stevens

2017

Energies

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Wireless power transfer from one transmitter to multiple receivers through inductive coupling is slowly entering the market. However, for certain applications, capacitive wireless power transfer (CWPT) using electric coupling might be preferable. In this work, we determine closed-form expressions for a CWPT system with one transmitter and two receivers. We determine the optimal solution for two design requirements: (i) maximum power transfer, and (ii) maximum system efficiency. We derive the optimal loads and provide the analytical expressions for the efficiency and power. We show that the optimal load conductances for the maximum power configuration are always larger than for the maximum efficiency configuration. Furthermore, it is demonstrated that if the receivers are coupled, this can be compensated for by introducing susceptances that have the same value for both configurations. Finally, we numerically verify our results. We illustrate the similarities to the inductive wireless power transfer (IWPT) solution and find that the same, but dual, expressions apply.

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“…[1][2][3][4][5][6][7][8] Different from traditional energy transfer, WPT has a promising future in a wide range of applications as it is able to deliver electrical energy wirelessly without direct cable connections. In recent years, wireless power transfer (WPT) has aroused a great deal of attention.…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of hybrid resonant loops for efficient wireless power transfer

Shi

Gao

Shen

et al. 2017

Circuit Theory & Apps

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Frequency splitting, caused by magnetic overcoupling, is a great challenge in resonant wireless power transfer, which leads to decrease of transfer efficiency. In this paper, to avoid the frequency splitting, a new design of hybrid resonant loops with an inner coil positioned in the transmitter is proposed for efficient power transfer. It is shown to suppress dramatic variation of mutual inductance when the distance between transmitter and receiver decreases.Analytical expressions of the mutual inductance and the transfer efficiency for the proposed resonant wireless power transfer system are calculated. To obtain a relatively uniform mutual inductance with respect to the distance, the proposed resonant loops are optimized. Simulation and experiments are also performed to validate the effectiveness of the proposed resonant loops in eliminating the frequency splitting. The transfer efficiency remains higher than 80% when the transfer distance decreases below a critical value where frequency splitting occurs for conventional resonant loops. Furthermore, lateral and angular misalignments between the resonant loops are also considered and investigated. The results indicate that the proposed resonant loops are also applicable in suppressing the frequency splitting even in case of misalignments.KEYWORDS frequency splitting, hybrid resonant loops, mutual inductance, transfer efficiency, wireless power transfer (WPT)

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Combined Conformal Strongly-Coupled Magnetic Resonance for Efficient Wireless Power Transfer

Cited by 20 publications

References 35 publications

A Review on the Fundamentals and Practical Implementation Details of Strongly Coupled Magnetic Resonant Technology for Wireless Power Transfer

A Review on the Fundamentals and Practical Implementation Details of Strongly Coupled Magnetic Resonant Technology for Wireless Power Transfer

Optimal Analytical Solution for a Capacitive Wireless Power Transfer System with One Transmitter and Two Receivers

Design and optimization of hybrid resonant loops for efficient wireless power transfer

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