Power feeding device and wireless power feeding system
First Claim
1. A wireless power reception device comprising:
- a second resonant coil configured to resonate with a first resonant coil of a wireless power feeding device;
a coil;
a rectifier circuit electrically connected to the coil;
a matching circuit configured to match impedance between the rectifier circuit and the coil; and
a battery electrically connected to the coil.
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Accused Products
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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Citations
6 Claims
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1. A wireless power reception device comprising:
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a second resonant coil configured to resonate with a first resonant coil of a wireless power feeding device; a coil; a rectifier circuit electrically connected to the coil; a matching circuit configured to match impedance between the rectifier circuit and the coil; and a battery electrically connected to the coil. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification