| CPC H02J 50/12 (2016.02) [B60L 53/122 (2019.02); H02J 50/05 (2016.02); H02J 50/40 (2016.02); H04B 5/79 (2024.01)] | 4 Claims |
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1. A power receiving device that receives power from a power transmitting device including a primary coil in a contactless manner and supplies power to a power storage device, the power receiving device comprising:
a secondary coil that receives AC power from the primary coil;
a capacitor connected to the secondary coil and constituting a resonant circuit together with the secondary coil;
a rectifier circuit that rectifies output power from the resonant circuit;
a power conditioning circuit that is disposed between the power storage device and the rectifier circuit and includes a switch; and
a control device that:
controls the switch using a driving frequency that is set based on the stability of the AC power received by the secondary coil,
wherein the driving frequency is obtained by dividing the frequency of the AC power by a natural number equal to or greater than 2;
estimates the stability of the AC power received by the secondary coil based on a determination of whether fluctuation of the power received by the secondary coil satisfies a threshold;
varies the natural number based on the determination, wherein
when the power received by the secondary coil satisfies the threshold, the natural number is increased, and
when the power received by the secondary coil does not satisfy the threshold, the natural number is decreased; and
sets the driving frequency based on the estimated stability of the AC power received by the secondary coil.
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