| 摘要 |
PROBLEM TO BE SOLVED: To provide a noncontact charger which obviates the necessity of discharging electricity on the side of equipment by being equipped with a discharge circuit for refresh. SOLUTION: For the noncontact charger 10, a primary circuit 12 is made of a rectifying circuit 20 for receiving commercial power, a primary coil 16a, and a MOSFET 24. A refresh mode is set by switching a switch 28 over to a contact 28b, and commercial power is applied to a primary coil 44a via a switch 42. This signal voltage is detected by a secondary circuit 40, and the secondary control circuit 40 intermits a MOSFET 38. Accordingly, discharge voltage from a battery 36 is induced in a primary coil 16b by a secondary coil, and this discharged voltage is discharged to an earth through a discharge resistor 30 from the switch 28. The primary control circuit switches the switch 28 over to a contact 28a when the discharge voltage falls under specified voltage. Accordingly, a charge mode is started, and a battery is charged by the charge voltage induced in the secondary coil. COPYRIGHT: (C)2004,JPO |
