Construction of a secure wireless power transfer system for robot fish

Ito, Ryo; Sawahara, Yuichi; Ishizaki, Toshio; Awai, Ikuo

doi:10.1109/wpt.2015.7139143

Cited by 7 publications

(5 citation statements)

References 1 publication

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“…Particularly, the magnetic core for the receiving-coil can offer a low reluctance flux path to collect the magnetic flux from the transmitting coil. Consequently, M can be increased effectively, as is confirmed in this study; therefore, it is utilised in a number of preceding studies [4,5,13].…”

Section: Introductionsupporting

confidence: 55%

“…Resonant inductive coupling-wireless coupling transfer (RIC-WPT) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] is a promising method to overcome this issue. The RIC-WPT technique can supply electric power without a cable connection to the external power source.…”

Section: Introductionmentioning

confidence: 99%

“…A magnetic structure that can reduce r R using a solid copper wire without deteriorating M is proposed herein. First, the conventional receiving-coil structure reported in [5,13] is presented; it employed the aforementioned two approaches to improve M. Then, this paper sought for a magnetic structure that could further reduce r R while maintaining an M as high as that of the conventional structure. The basic principle of this structure was originally proposed in a conference paper [16].…”

Section: Introductionmentioning

confidence: 99%

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Receiving‐coil structure reducing stray AC resistance for resonant coupling wireless power transfer

Umetani

Honjo

Koyama

et al. 2019

IET Power Electronics

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Resonant inductive coupling wireless power transfer is widely known to be a possible convenient power supply method for the small mobile apparatus. However, the limited receiving-coil size tends to lower the efficiency and limit the output power owing to the small mutual inductance and comparatively large stray alternating current (AC) resistance of the receivingcoil. This study mitigates this issue by proposing a novel receiving-coil structure. This proposed structure comprises a coil and a drum core with a thin axis. The coil is wound on the axis to form a single winding layer. The proposed structure can reduce stray AC resistance by suppressing the proximity effect and reducing the wire length without deteriorating the mutual inductance significantly. Therefore, better efficiency and larger output power can be achieved. Simulations and experiments were performed to verify the proposed structure. Consequently, both simulations and experiments supported the reduction in AC resistance compared to the conventional structure. Furthermore, the experiment revealed improvements by the proposed structure in both efficiency and output power. These results support the effectiveness of the proposed structure for wireless power transfer to small mobile apparatus.

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Section: Introductionsupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Receiving‐coil structure reducing stray AC resistance for resonant coupling wireless power transfer

Umetani

Honjo

Koyama

et al. 2019

IET Power Electronics

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“…As can be seen in (20), P max (ω) is a function of the angular frequency. The angular frequency ω can be optimized by searching for ω that maximizes P max (ω).…”

Section: Optimum Load Impedancementioning

confidence: 99%

“…However, the coupling coefficient becomes weak as the distance between the transmitting and receiving resonators becomes large, thus decreasing the power transfer capability to a distant place. In order to mitigate this difficulty, the dual transmitting resonator WPT (DTR-WPT) has been proposed in a preceding work (20) . Figure 1(b) illustrates the DTR-WPT system.…”

Section: Introductionmentioning

confidence: 99%

Design Optimization Method for the Load Impedance to Maximize the Output Power in Dual Transmitting Resonator Wireless Power Transfer System

2018

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Recently, the dual transmitting resonator wireless power transfer system (DTR-WPT) has been proposed as a promising technique for the power supply of mobile apparatus. Although this technique has been reported to be effective for increasing the output power as well as for covering a wide area during wireless power transfer, the complicated magnetic coupling among two transmitting resonators and one receiving resonator makes it difficult to develop practical design optimization methods, thus hindering practical applications of this technique. The purpose of this paper is to propose a design optimization method for the load impedance of DTR-WPT. This method is derived based on a novel simple equivalent circuit model of the DTR-WPT. The optimum impedance derived using this method as well as the appropriateness of the equivalent circuit were verified experimentally, thus validating usefulness of the proposed method for the practical application of DTR-WPT.

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High-Frequency, Mid-range Wireless Power Transfer System using Critical Coupling Coefficient Adjustment

Kim

Choi

2021

2021 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Construction of a secure wireless power transfer system for robot fish

Cited by 7 publications

References 1 publication

Receiving‐coil structure reducing stray AC resistance for resonant coupling wireless power transfer

Receiving‐coil structure reducing stray AC resistance for resonant coupling wireless power transfer

Design Optimization Method for the Load Impedance to Maximize the Output Power in Dual Transmitting Resonator Wireless Power Transfer System

High-Frequency, Mid-range Wireless Power Transfer System using Critical Coupling Coefficient Adjustment

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