| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain an optimum transmission efficiency, as well as, shorten the time required for designing, by clarifying the relations among the transmission-side oscillation frequency, transmission-side resonant frequency, and reception-side resonant frequency of a noncontact power transmission circuit. <P>SOLUTION: There is provided a noncontact power transmission circuit that noncontactly transmits power to a reception coil Ls on the receiving side 30 by electromagnetic induction from a separately-excited or self-excited switching circuit 2 and transmission coil Lp on the transmission side 10. This noncontact power transmission circuit includes the switching circuit 2; a control IC3 for driving the switching circuit; an LC series resonant circuit connected in series with the transmission coil Lp, or an LC parallel resonant circuit connected in parallel with the transmission coil Lp; and an LC parallel resonant circuit connected in parallel with the reception coil Ls. The oscillation frequency (Fosc) of the control IC3, the resonant frequency (Fpr) of the LC series resonance circuit or the LC parallel resonant circuit on the transmission side 10, and the resonant frequency (Fsr) of the LC parallel resonant circuit on the receiving side 30 satisfy the relation: Fpr<Fosc<Fsr. <P>COPYRIGHT: (C)2010,JPO&INPIT |
