A Planar Distributed Multicoil Antenna to Generate 3-D Ellipsoidally Polarized H-Field for Angular Misalignment Tolerant WPT System

Srivastava, Vivek Kumar; Sharma, Ashwani; Bharadwaj, Ananth

doi:10.1109/tap.2021.3137477

Cited by 7 publications

(2 citation statements)

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“…In the unloaded condition, the internal resistance of the feeder and that of the receiver coil are measured as 𝑅 1 = 58.4 Ω and 𝑅 2 = 1.4 Ω, respectively. In the loaded condition, for each position 𝑥 of the receiver, we measure the Z-parameters (𝑍 11 , 𝑍 12 , 𝑍 21 , 𝑍 22 ) and calculate the maximum efficiency by using formula given in [21] as follows.…”

Section: Methodsmentioning

confidence: 99%

“…A wide coverage IPT can be realized by elongating the transmitting coil as in [14], [16] or by deploying many small coils in an array as in [17]- [21]. The coil-array is able to focus the magnetic field toward the receiving coils to achieve a sufficient coupling, but it requires a complex mechanism to locate the receivers and to activate/deactivate the coils.…”

Section: Introductionmentioning

confidence: 99%

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Efficiency Analysis for Inductive Power Transfer Using Segmented Parallel Line Feeder

Brou

Duong

Okada

2023

IEICE Trans. Electron.

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Parallel line feeder (PLF) consisting of a two-wire transmission line operating in the MHz band has been proposed as a widecoverage short-distance wireless charging. In the MHz band, a PLF of several meters suffers from standing wave effect, resulting in fluctuation in power transfer efficiency accordingly to the receiver's position. This paper studies a modified version of the system, where the PLF is divided into individually compensated segments to mitigate the standing wave effect. Modelling the PLF as a lossy transmission line, this paper theoretically shows that if the segments' lengths are properly determined, it is able to improve and stabilize the efficiency for all positions. Experimental results at 27.12 MHz confirm the theoretical analysis and show that a fairly high efficiency of 70% can be achieved.

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Section: Methodsmentioning

confidence: 99%