| 摘要 |
PROBLEM TO BE SOLVED: To reduce stand-by time power consumption, and additionally to automatically perform non-charging time intermittent operation and charging- time continuous operation on the basis of the magnitude of a primary input current, without bothering a user, by operating a switch device intermittently when charging is not performed or when charging is finished. SOLUTION: A noncontact charger 10 performs charging by connecting a rectifier circuit 18 to a commercial power source 12, connecting a primary power feed coil 22a of an electromagnetic transformer 22 and a switch device 24 to the circuit 18 via a filter capacitor 20, and connecting a battery 36 to the secondary power receiving coil 22b of this transformer 22 through a rectifier circuit, has a current sensor 26 which detects the input current on the primary side of the electromagnetic transformer, and controls switch operation of the switch device 24 causing a control circuit 28 to oscillate intermittently or continuously, on the basis of the relation between the current detected by the sensor 26 and a preset current value.
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