CONTACTLESS POWER SUPPLY SYSTEM, POWER SUPPLY DEVICE, AND METHOD FOR CONTROLLING CONTACTLESS POWER SUPPLY SYSTEM

摘要

The transmission device 10 acquires from the positioning device 14 a direction ± in which the power receiving device 20 exists, makes an oriented direction of the transmission element 12 face the direction of the power receiving device 20 and starts transmission, acquires a distance between the transmission device itself and the power receiving device 20 based on the position of the power receiving device 20 acquired from the positioning device 14, obtains a permissible range of transmission efficiency, which corresponds to the acquired distance, receives a power value that is currently being supplied from the transmission device 10, which is sent from the power receiving device 20, obtains a current transmission efficiency based on the received power value and a power value of the current transmission power, and in the case that the current transmission efficiency deviates from the permissible range, acquires again from the positioning device 14 a direction ± in which the power receiving device 20 exists, and based on the acquired direction ±, controls the oriented direction of the transmission element 12 so that the oriented direction of the transmission element 12 faces the direction of the power receiving device 20.