Title:
A power transmission device, wireless electric power transmission systems, and an electric power transmission discriminating method
Document Type and Number:
Japanese Patent JP6037022
Kind Code:
B2
Abstract:
The frequency of an AC voltage applied to an active electrode and a passive electrode of a power transmission device is swept and input impedance (input voltage DCV) of a power receiving device side as viewed from a DC-to-AC inverter circuit is detected for each change of the frequency of the AC voltage. A determination is made as to whether the input voltage DCV in a first frequency range determined by a resonant frequency of a series resonance circuit of the power transmission device and parallel resonance circuit of the power receiving device falls with a range of 25 mV to 450 mV, and the input voltage DCV detected in a second frequency range is equal to or lower than 100 mv. When the results of both determinations are true, power is transmitted to the power receiving device.
Inventors:
Hiroki Sakai
Application Number:
JP2015535448A
Publication Date:
November 30, 2016
Filing Date:
August 29, 2014
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H02J50/05
Domestic Patent References:
| JP2013062895A | 2013-04-04 | |||
| JP2012065477A | 2012-03-29 |
Attorney, Agent or Firm:
Kaede International Patent Office
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