| 摘要 |
PROBLEM TO BE SOLVED: To provide a noncontact electric power transmission system capable of preventing impedance matching from being deviated when a car height is changed.SOLUTION: A noncontact electric power transmission system includes an electric power transmission coil (210) for transmitting electric power from an electric power source (230) in non-contact with an electric power receiving coil (110) mounted on a vehicle (100), a multi-stage matching unit (220) which is connected to the electric power transmission coil and is configured to be adjustable for self impedance, a detection part (170) which is disposed on the vehicle and detects locking and unlocking of a door of the vehicle, and a control part (180) which stops electric power transmission when the detection part detects the unlocking, and when the detection part detects the unlocking and thereafter further detects the locking, adjusts the multi-stage matching unit so as to match impedance of the electric power source with the electric power transmission coil and impedance of the electric power receiving coil with the electric power transmission coil, and then resumes the electric power transmission. |
