Title:
Power supply method
Document Type and Number:
Japanese Patent JP6018239
Kind Code:
B2
Abstract:
In electric power supply through wireless signals, electric power is supplied efficiently, even when distance fluctuation is caused between an electric power transmitting device and an electric power receiving device. Even when distance fluctuation is caused between the electric power transmitting device for supplying electric power with the use of wireless signals and the electric power receiving device for receiving electric power supplied from the electric power transmitting device, the Q value of the electric power transmitting device is adjusted to optimize the transmission efficiency. The impedance of a resonance circuit of the electric power transmitting device is fluctuated at a constant frequency, the resulting reflected wave is detected as a response signal by the electric power transmitting device, and the Q value of the electric power transmitting device is adjusted to optimize the transmission efficiency.
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Inventors:
Koichiro Kamata
Application Number:
JP2015023146A
Publication Date:
November 02, 2016
Filing Date:
February 09, 2015
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
H02J50/12; H02J7/00; H02J50/80
Domestic Patent References:
| JP2007199871A | ||||
| JP2010051137A |
Foreign References:
| US20100136911 |
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