DELAY SWITCH CIRCUIT FOR RESTRAINING ELECTRICAL PULSE CURRENT

摘要

A delay switch circuit for restraining electrical pulse current is provided. The delay switch circuit delays the turn-on of a second switch tube using a switch delay timing network composed of a second resistance and a second capacitance. After the second switch tube is turned on, a first capacitance is charged, and then a first switch tube is turned on, thus a battery begins to charge a main circuit. The first switch tube is coupled in a main power supply loop as a delay switch. When power on, the delay switch connects the main power supply loop with an electrical source after a certain time of delay, so as to delay the turn-on of the switch. There is a transition period of resistance varying from large to small. Pulse current at the instant of power on is effectively restrained in time by the double effect of the turn-on of delay and resistance varying, so as to achieve the purposes of eliminating ignition of battery pole pieces when power on and reducing electromagnetic interference at the instant of power on.