Power feeding device and wireless power feeding system
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United States of America Patent
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Nov 26, 2019
Grant Date -
Mar 29, 2018
app pub date -
Nov 29, 2017
filing date -
Jan 20, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A resonant power feeding system that can provide high power transmission efficiency between a power feeding device and a power reception device without dynamically controlling the oscillation frequency in accordance with the distance between the power feeding device and the power reception device. High power transmission efficiency between the power feeding device and the power reception device is obtained by addition of a structure for adjusting the matching condition to both the power reception device and the power feeding device. Specifically, a transmission-reception circuit and a matching circuit are provided in both the power reception device and the power feeding device, and wireless signals for adjusting the matching circuit are transmitted and received through a resonant coil. Thus, the power feeding device can efficiently supply power to the power reception device without adjusting the oscillation frequency.
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