| 摘要 |
PROBLEM TO BE SOLVED: To increase a distance within which power can be transmitted from a power transmission coil, and make it possible to stably transmit power depending on an inter-coil distance in a region (double peak characteristic region) where the inter-coil distance is shorter than that in a critical coupling state.SOLUTION: A device comprising a power transmission device 1 having a power transmission coil 4a and a power reception device 2 having a power reception coil 4b transmits power through an action between the power transmission coil and power reception coil. The device further comprises: a power transmission auxiliary device 9 having an auxiliary resonator composed of an auxiliary coil 10 and resonance capacitance 11; a resonance control unit 14 for adjusting a resonance frequency of the auxiliary resonator; and a joint support mechanism 12 for keeping an inter-coil distance between the power reception coil and auxiliary coil constant. The device is configured so that power is transmitted by arranging the power reception coil in power reception space formed between the power transmission coil and auxiliary coil. The resonance control unit optimizes reception power supplied to the reception device by adjusting the resonance frequency of the auxiliary resonator depending on an inter-coil distance in an axis direction between the power transmission coil and auxiliary coil. |
