| 摘要 |
PURPOSE:To stop the occurrence of high pulse voltage by limiting the operation of an igniter circuit when the input power is shut off. CONSTITUTION:A relay Ry1 is connected between a switch SW1 and a diode bridge DB. The contact r1 of this relay Ry1 is inserted and connected to the positive side of a DC power source circuit 4 for control. Only when the switch SW1 is on, the relay Ry1 operates to wake the contact r1, and actuates the DC power source circuit 4 for control. When the switch SW1 is fumed off to extinguish a lamp 3, the relay Ry1 becomes unexcited, and the contact r1 is broken. Accordingly, the DC power source circuit 4 for control is turned off immediately and the operation of an inverter circuit 1 and an igniter circuit 2 stops, which stops the generation of high pulse voltage. |
