CONTROL CIRCUIT OF OPERATING MECHANISM

PROBLEM TO BE SOLVED: To suppress a surge voltage generated from a control circuit of an operating mechanism in which a switching unit is operated to be opened or closed. SOLUTION: This is the control circuit of the operating mechanism which is equipped with a motor 1 of the switching operation member to operate the switching unit opened or closed, a surge suppression device composed of a serially connected capacitor 4 connected to the motor 1, and a resistor 5, and a three-way change-over switch 3 to change connection to the surge suppression device and the motor 1. When the motor 1 is in motion, the surge voltage is suppressed by connecting the surge suppression device serially to the motor 1 by means of the three-way change-over switch 3, while when the motor 1 is in standstill, the three-way change-over switch 3 is switched to short-circuit the capacitor 4, and the resistor 5 is arranged to be connected in parallel with the motor 1, so that the surge voltage from the motor 1 is suppressed. COPYRIGHT: (C)2008,JPO&INPIT