To provide a secondary power receiving circuit of noncontact power supply facility which can supply a large current to a load in a short time while reducing heat generation of a pickup coil.
The secondary power receiving circuit of noncontact power supply facility comprises a plurality of power supply sections each consisting of two series resonance circuits 4 formed of a pickup coil 2 and a capacitor 3, and a power supply block circuit having a switching means 5 for bringing each series resonance circuit 4 and a circuit 6 for rectifying the voltage generated from each series resonance circuit 4 into connected state or open state and connected in parallel with the rectifier circuits 6, output capacitors 8 connected in parallel with the output of respective power supply sections and being connected with a load 10 of variable power consumption, and a voltage controller 11 for controlling the switching means 5 of the power supply block circuit in each power supply section and controlling the voltage of the output capacitor 8 to a reference voltage. The voltage controller 11 is arranged to supply a current to the output capacitor 8 from one power supply section alternately every predetermined time when the voltage of the output capacitor 8 is within a set voltage range.
COPYRIGHT: (C)2007,JPO&INPIT
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Toshiji Sasahara
Yohei Harada