A coil layout of wireless power transfer systems based on multicoil arrangement for underwater vehicles

Sato, Naoki; Kifune, Hiroyasu; Komeda, Shohei

doi:10.1002/eej.23205

Cited by 16 publications

(14 citation statements)

References 20 publications

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“…In the z direction, it can be moved up to 15 cm. The double-layer multi-transmitter coil configuration, commonly found in portable wireless chargers [33], [34]. The number of activated transmitter coils is properly assigned corresponding to the receiver position to ensure maximum power transfer efficiency.…”

Section: System Descriptionsmentioning

confidence: 99%

An Inverter Topology for MultiTransmitter Wireless Power Transfer Systems

et al. 2022

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This paper presents an inverter topology for a static wireless power transfer (SWPT) system that is intended to reduce the component counts and complexity of the conventional excitation circuit for multiple transmitter coils. The proposed inverter topology requires only (n+1) power switches, where ''n'' is the number of transmitter coils. The currents in the transmitter coils can be independently controlled. The output voltage is regulated through the transmitter-side control by adjusting the duty cycle of the inverter switches. A detection method of the receiver coil position is developed by comparing the transmitter currents to the predetermined transmitter coil patterns. The proposed detection method helps decide the proper transmitter selection, which improves the transfer efficiency throughout the operation. An experimental study is performed on the created 500-watt WPT multi-coil system. As the receiver coil is placed in the designated area, the proper transmitter coil pattern can be automatically selected and energized. The output voltage can be regulated to the desired values throughout the operation, regardless of the load condition.INDEX TERMS Inverter topology, multi-transmitter coil, transmitter-side control, output voltage regulation, receiver coil position detection, wireless power transfer.

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Section: System Descriptionsmentioning

confidence: 99%

An Inverter Topology for MultiTransmitter Wireless Power Transfer Systems

et al. 2022

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“…2 c ), such a structure uses parallel transmitter resonators, and is identified as the parallel array [37, 38]. Today, the majority of power arrays of resonators are based on: (i) conventional floating resonators [39–42]; (ii) parallel switching multi‐transmitter coil approaches [43–50]; and just recently, (iii) parallel inductive arrays were introduced as an enhanced solution.…”

Section: Introductionmentioning

confidence: 99%

“…The transmitter array configurations and mechanisms such as parallel switching transmitter coil solutions [43–50] can be viewed and modelled as a floating array since the switching mechanism activates only one transmitter resonator or multiple floating transmitter arrays at once. In particular, in a 2019 study by Nutwong et al [45], the authors described a parallel switching multi‐transmitter WPT design.…”

Section: Introductionmentioning

confidence: 99%

“…No other solutions [10–36, 39–51] have the capability to: (i) transfer power without a dead zone area when gaps exist between the coil elements in the array; and to (ii) charge clusters of multiple resonators of arbitrary shapes and distances between clusters. Such designs need perfect alignments and strongly coupled chains of resonators to transfer power in conventional designs.…”

Section: Introductionmentioning

confidence: 99%

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Multi‐resonator arrays for smart wireless power distribution: comparison with experimental assessment

Mirbozorgi

Maghsoudloo²,

Bahrami³

et al. 2020

IET power electron.

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This study presents the design of efficient wireless power distribution systems based on resonant inductive arrays. The authors show how to use multi‐resonator arrays to charge and power up several electric devices in parallel, with nearly constant transmitted power, and using a single power source. Their single‐source wireless power transmission clusters, for instance, are shown to provide free positioning at better power efficiency than previous solutions. They provide analysis, simulation, and measurement performance of their multi‐resonator arrays, they compare them with other types of inductive arrays employed into different schemes (multi‐coil inductive links, overlapping and non‐overlapping links), and they show the advantage of their strategy over previous solutions. The presented wireless power distribution systems improve power transmission efficiency (PTE) in free positioning by as much as 30%. The measured results show that their multi‐resonator arrays present significant advantages: (i) they allow multiple charging zones from a single power source; (ii) they provide free positioning with strictly uniform power delivered to the load; and (iii) they provide superior efficiency through a built‐in power localization mechanism, which is not available in other solutions. The PTE of the multi‐resonator array in single‐receiver and multi‐receiver configurations outperformed previous solutions by 26% and 12%, respectively.

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“…In [9], coil shielding strategies are presented to minimize the induced eddy currents, which are the major source of loss at the transmitter. In [10], multi-coil based receivers are proposed to minimize the parallel and angular alignment dependency of the magnetic coupling. In [11], a coil structure with two transmitter coils and one receiver is proposed to reduce the eddy-current losses and increase the power transfer efficiency (PTE) of the system in 10%.…”

Section: Casimiro De Abreu Primaverasmentioning

confidence: 99%

Data and Power Transmission for Underwater Monitoring Systems Using Metamaterials

ALMEIDA¹

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I would like to acknowledge and thank my advisors, prof. Eduardo Costa da Silva and prof. Carlos Antonio França Sartori, for supporting me during my studies; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), for the scholarship and support; all my laboratory fellows and professors from the Centro de Estudos em Telecomunicações (CETUC), particularly prof.

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A coil layout of wireless power transfer systems based on multicoil arrangement for underwater vehicles

Cited by 16 publications

References 20 publications

An Inverter Topology for MultiTransmitter Wireless Power Transfer Systems

An Inverter Topology for MultiTransmitter Wireless Power Transfer Systems

Multi‐resonator arrays for smart wireless power distribution: comparison with experimental assessment

Data and Power Transmission for Underwater Monitoring Systems Using Metamaterials

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