Patent ID: 8212389
Filing Date: 2012-07-03
Classification: H01H,H01M,Y02E

Abstract:
1. A relay driving circuit, comprising: a relay; first and second terminals which are connected to a power supply; a capacitor; a switching portion, which switches between a coil of the relay, the capacitor, and the first terminal, and includes a first switch portion that opens and closes connection between the first terminal and one end of the capacitor and a second switch portion that opens and closes connection between the first terminal and the other end of the capacitor; and, a control portion, which causes the capacitor to be charged by closing the first switch portion and opening the second switch portion, and when the relay is operated, causes the first terminal and the capacitor to be connected so that the power supply and the capacitor are series-connected by opening the first switch portion and closing the second switch portion, and in addition causes the series circuit of the power supply and the capacitor to be connected to the coil of the relay by means of the switching portion so that voltage resulting from addition of output voltage of the power supply and charging voltage of the capacitor is supplied to the coil of the relay.