| 发明名称 |
POWER TRANSMISSION APPARATUS AND POWER TRANSMISSION METHOD |
| 摘要 |
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. |
| 申请公布号 |
US2016094053(A1) |
申请公布日期 |
2016.03.31 |
| 申请号 |
US201514962594 |
申请日期 |
2015.12.08 |
| 申请人 |
FUJITSU LIMITED |
发明人 |
SHIMOKAWA Satoshi |
| 分类号 |
H02J5/00 |
主分类号 |
H02J5/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A power transmission apparatus comprising:
a primary coil connected to an AC source; a primary resonance coil configured to receive power from the primary coil by electromagnetic induction; 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 by electromagnetic induction; a phase difference detector configured to detect a phase difference between a phase of voltage which is supplied to the primary resonance coil and a phase of current which flows through the primary resonance coil; a variable capacitor attached to the primary resonance coil; and a determination part configured to determine 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 upon changing the capacitance of the variable capacitor. |
| 地址 |
Kawasaki-shi JP |
