| 摘要 |
<P>PROBLEM TO BE SOLVED: To keep transmission efficiency intact in the event of a resonance frequency shift of a resonator. <P>SOLUTION: A contactless power transmission apparatus using resonators in transmission/reception includes on a transmitting side: a transmitting side resonator comprising a series connection of an inductor (L1) and a capacitor (C1); drive circuits (11, Mn, Mp) for driving one end of the transmitting side resonator according to a reference timing signal Vr and ensuring a drive stop period in which an output is high impedance; a phase comparator (12) for comparing the phase of a signal Vc at the one end of the transmitting side resonator with that of the reference timing signal Vr in the drive stop period; a phase difference-voltage conversion circuit (13) for converting a phase difference as the result of comparison in the phase comparator (12) into a voltage; and a voltage-controlled oscillator (14) for generating a signal corresponding to the reference timing signal Vr on the basis of the converted voltage. <P>COPYRIGHT: (C)2012,JPO&INPIT |
