### Abstract

This study analyzes the steady state behavior of wireless power transfer through the magnetic coupling between two LC-resonators that consist of a loop coil (diameter 0.2 m) and a terminating capacitor based on an equivalent circuit model. Parameters considered include the quality factor Q of resonators and the distances between coils, which govern the strength of the magnetic coupling and the frequency of the sinusoidal power source (24 ∼ 28 kHz range). The efficiency and amount of power transferred are calculated under the optimum load for the distance of transfer. The analysis proves that with a moderately high Q of 227, the efficiency can reach above 85 at the distance equal to the radius of the resonant coil, when the load is optimized. An important finding from the analysis is that there is a value for the frequency where the optimum load is almost unchanged, even when the distance between two resonators changes.

Original language | English |
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Article number | 07E733 |

Journal | Journal of Applied Physics |

Volume | 111 |

Issue number | 7 |

DOIs | |

Publication status | Published - Apr 1 2012 |

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### All Science Journal Classification (ASJC) codes

- Physics and Astronomy(all)

### Cite this

*Journal of Applied Physics*,

*111*(7), [07E733]. https://doi.org/10.1063/1.3680237

**Analysis of mid-range electric power transfer based on an equivalent circuit model.** / Sasada, Ichiro.

Research output: Contribution to journal › Article

*Journal of Applied Physics*, vol. 111, no. 7, 07E733. https://doi.org/10.1063/1.3680237

}

TY - JOUR

T1 - Analysis of mid-range electric power transfer based on an equivalent circuit model

AU - Sasada, Ichiro

PY - 2012/4/1

Y1 - 2012/4/1

N2 - This study analyzes the steady state behavior of wireless power transfer through the magnetic coupling between two LC-resonators that consist of a loop coil (diameter 0.2 m) and a terminating capacitor based on an equivalent circuit model. Parameters considered include the quality factor Q of resonators and the distances between coils, which govern the strength of the magnetic coupling and the frequency of the sinusoidal power source (24 ∼ 28 kHz range). The efficiency and amount of power transferred are calculated under the optimum load for the distance of transfer. The analysis proves that with a moderately high Q of 227, the efficiency can reach above 85 at the distance equal to the radius of the resonant coil, when the load is optimized. An important finding from the analysis is that there is a value for the frequency where the optimum load is almost unchanged, even when the distance between two resonators changes.

AB - This study analyzes the steady state behavior of wireless power transfer through the magnetic coupling between two LC-resonators that consist of a loop coil (diameter 0.2 m) and a terminating capacitor based on an equivalent circuit model. Parameters considered include the quality factor Q of resonators and the distances between coils, which govern the strength of the magnetic coupling and the frequency of the sinusoidal power source (24 ∼ 28 kHz range). The efficiency and amount of power transferred are calculated under the optimum load for the distance of transfer. The analysis proves that with a moderately high Q of 227, the efficiency can reach above 85 at the distance equal to the radius of the resonant coil, when the load is optimized. An important finding from the analysis is that there is a value for the frequency where the optimum load is almost unchanged, even when the distance between two resonators changes.

UR - http://www.scopus.com/inward/record.url?scp=84861759227&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84861759227&partnerID=8YFLogxK

U2 - 10.1063/1.3680237

DO - 10.1063/1.3680237

M3 - Article

AN - SCOPUS:84861759227

VL - 111

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 7

M1 - 07E733

ER -