Design of magnetic transmitters with efficient reactive power utilization for inductive communication and wireless power transfer

Tal, Nikolay; Morag, Yahav; Levron, Yoash

doi:10.1109/comcas.2015.7360398

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…Most recent researches are focused on the study of the active power transfer [135], [136]. While in [137] authors study the effect of reactive power on the MI system. They found that the ratio of the reactive power on the radiated magnetic field is not related to the power or the current passing through the coils but is related to the geometry of the coils.…”

Section: Simultaneous Wireless Power and Information Transfer (Swpit)mentioning

confidence: 99%

Underwater Wireless Sensor Networks: A Survey on Enabling Technologies, Localization Protocols, and Internet of Underwater Things

et al. 2019

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Underwater communication remains a challenging technology via communication cables and the cost of underwater sensor network (UWSN) deployment is still very high. As an alternative, underwater wireless communication has been proposed and have received more attention in the last decade. Preliminary research indicated that the Radio Frequency (RF) and Magneto-Inductive (MI) communication achieve higher data rate in the near field communication. The optical communication achieves good performance when limited to the line-of-sight positioning. The acoustic communication allows long transmission range. However, it suffers from transmission losses and time-varying signal distortion due to its dependency on environmental properties. These latter are salinity, temperature, pressure, depth of transceivers, and the environment geometry. This paper is focused on both the acoustic and magneto-inductive communications, which are the most used technologies for underwater networking. Such as acoustic communication is employed for applications requiring long communication range while the MI is used for real-time communication. Moreover, this paper highlights the trade-off between underwater properties, wireless communication technologies, and communication quality. This can help the researcher community by providing clear insight for further research.

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Section: Simultaneous Wireless Power and Information Transfer (Swpit)mentioning

confidence: 99%

Underwater Wireless Sensor Networks: A Survey on Enabling Technologies, Localization Protocols, and Internet of Underwater Things

et al. 2019

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“…This helps compensate the reactive power consumed by the selfinductance of the coil at each transmitter/receiver, but in general reminiscent reactive power presents due to the magnetic coupling between the transmitters and receiver. In practice, when the reactive power consumption in the MRC-WPT system is large, the transmitters' source voltages may spike [28]. To keep the MRC-WPT system practically feasible, either the peak voltage/current constraints for individual transmitters need to be considered [23], or equivalently the complex power drawn from these sources should be minimized [29].…”

Section: System Modelmentioning

confidence: 99%

Node Placement and Distributed Magnetic Beamforming Optimization for Wireless Power Transfer

Moghadam

Zhang

2018

IEEE Trans. on Signal and Inf. Process. over Networks

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Abstract-In multiple-input single-output (MISO) wireless power transfer (WPT) via magnetic resonant coupling, multiple transmitters are deployed to enhance the efficiency of power transfer to a single receiver by jointly adapting their source currents/voltages so as to constructively combine the induced magnetic fields at the receiver, a technique known as magnetic beamforming. In practice, since the transmitters (power chargers) are usually at fixed locations and the receiver (e.g. mobile phone) is desired to be freely located in a target region for wireless charging, its received power can fluctuate significantly over locations even with adaptive magnetic beamforming applied. To achieve uniform power coverage, the transmitters need to be optimally placed in the region such that a minimum charging power can be achieved for the receiver regardless of its location, which motivates this paper. First, we derive the optimal magnetic beamforming solution in closed-form for a distributed MISO WPT system with fixed locations of the transmitters and receiver to maximize the deliverable power to the receiver subject to a given sum-power constraint at all transmitters. By applying adaptive magnetic beamforming based on this optimal solution, we then jointly optimize the locations of all transmitters to maximize the minimum power deliverable to the receiver over a given one-dimensional (1D) region. Although the formulated problem is non-convex, we propose an iterative algorithm for solving it efficiently. Extensive simulation results are provided which show the significant performance gains by the proposed design with optimized transmitter locations and magnetic beamforming as compared to other benchmark schemes with nonadaptive and/or heuristic transmitter current allocation and node placement. Last, we extend the node placement problem to the case of two-dimensional (2D) region, and propose efficient designs for this case.

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“…In near-field wireless power transfer system, magnetic inductive coupling is a traditional method which transmit the power in short-range [1]. Recently, magnetic resonant coupling has drawn significant interest in the near-field WPT system due to the improvement in high power transfer efficiency as well as long operation range [2][3].…”

Section: The Background and Motivationmentioning

confidence: 99%

Investigation of hybrid metamaterial for enhancing efficiency of wireless power transfer systems

Chen

Kung

Lin

2017

2017 IEEE International Symposium on Antennas and Propagation &Amp; USNC/URSI National Radio Science Meeting

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With the drastic attention of the wireless power transfer (WPT) system for the electronic devices, applying the metamaterial mechanism into the WPT system is one of the potential methods for improving the power transfer efficiency (PTE).Different from the conventional metamaterial slab with single negative permeability, the WPT with hybrid negative permeability (HNP) metamaterial slab has higher PTE. In this thesis, we investigate the parameters of HNP slab at different position between WPT coils. The results show that the optimal parameters of HNP slab for high PTE is dependent on the metamaterial position. After adopting an appropriate HNP slab, the higher PTE can be obtained at required arrangement of WPT coil module with the metamaterial slab, e.g, increasing the effective transfer distance from 5 cm to 8 cm, the efficiency has remained at 32 %. Furthermore, with the HNP slab, the PTE has improved from 23.4 % to 55 % in the same transferred distance of 10cm.We not only investigate the WPT system with HNP slab, but also discuss the parameter extraction method of the metamaterial in the near-field. Instead of the full-wave parameter extraction method, the metamaterial in the condition of near-field will be considered, so will the oblique incident condition.

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Design of magnetic transmitters with efficient reactive power utilization for inductive communication and wireless power transfer

Cited by 7 publications

References 16 publications

Underwater Wireless Sensor Networks: A Survey on Enabling Technologies, Localization Protocols, and Internet of Underwater Things

Underwater Wireless Sensor Networks: A Survey on Enabling Technologies, Localization Protocols, and Internet of Underwater Things

Node Placement and Distributed Magnetic Beamforming Optimization for Wireless Power Transfer

Investigation of hybrid metamaterial for enhancing efficiency of wireless power transfer systems

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