CONTACTLESS POWER-SUPPLYING DEVICE AND CONTACTLESS POWER-SUPPLYING SYSTEM IN WHICH SAME IS USED

摘要

Provided is a contactless power-supplying device with which it is possible to suppress a reduction in efficiency due to the positional relationship between a primary coil and a secondary coil. Also provided is a contactless power-supplying system in which said device is used. A contactless power-supplying device (2) is provided with a primary LC circuit (24) that comprises a primary coil (L1) and a primary capacitor (C1), an alternating current power source (21) for inputting alternating current electrical power to the primary LC circuit (24), and a primary control unit (22) for controlling the alternating current power source (21). When the alternating current power source (21) is started and before normal operations begin, the primary control unit (22) carries out a property-estimating operation for estimating the properties of the primary LC circuit (24) while controlling the alternating current power source (21) such that the effective value of the output voltage (V) is lower than the output voltage during normal operation.