Title:
Electric power transmission equipment and an electric power transmission method
Document Type and Number:
Japanese Patent JP6135762
Kind Code:
B2
Abstract:
A power transmission apparatus includes a primary coil connected to an AC source; a primary resonance coil configured to receive power from the primary coil; a secondary resonance coil configured to receive power from the primary resonance coil by magnetic field resonance occurred between the primary resonance coil and the secondary resonance coil; a secondary coil configured to receive power from the secondary resonance coil; a phase difference detector detect a phase difference between a phase of voltage supplied to the primary resonance coil and a phase of current flowing through the primary resonance coil; a variable capacitor provided on the primary resonance coil; and a determination part determining a coupling degree between the primary resonance coil and the secondary resonance coil based on a change degree of the phase difference relative to a change amount of capacitance when the capacitance of the variable capacitor changes.
Inventors:
Satoshi Shimokawa
Application Number:
JP2015523683A
Publication Date:
May 31, 2017
Filing Date:
June 24, 2013
Export Citation:
Assignee:
富士通株式会社
International Classes:
H02J50/10; H02J7/00; H02J50/80
Domestic Patent References:
| JP201381331A | ||||
| JP2010239690A | ||||
| JP2010239769A |
Foreign References:
| WO2011099071A1 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Takao Kato
Tadahiko Ito
Takao Kato
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