一种断电延时时间继电器控制电路

Power-off delay time relay control circuit

Abstract

一种断电延时时间继电器控制电路,包括第一电路和二电路,其特征在于:所述的第一电路含有电源一、电源二、整流桥堆、滑动电阻、若干个二极管、若干个电容器件和电阻RS2,所述的电源一连接全桥的整流桥堆的一个引脚1,所述的电源二串联滑动电阻接入整流桥堆另一引脚3,所述的整流桥堆一引脚2分出三条支路,三条支路并联后连接零线后接入整流桥堆一引脚4形成回路,所述支路一串联电容器件C1,所述支路二串联D1与电容器件CR1,所述支路三与电容器件CS1和电阻RS2的并联连接再串联D2。本实用新型无需要大容量的储能元件就可以延长断电后的电源保持时间,结构得以大幅度减化。
A power-off delay time relay control circuit comprises a first circuit and a second circuit. The control circuit is characterized in that the first circuit comprises a power source 1, a power source 2, a rectifier bridge stack, a slide resistor, a plurality of diodes, a plurality of capacitors and a resistor RS2. The power source 1 is connected with the pin 1 of the full-bridge rectifier bridge stack. The power source 2, after connecting in series with the slide resistor, is connected with another pin 3 of the rectifier bridge stack. The pin 2 of the rectifier bridge stack is branched into three branches. After the three branches are in parallel connection and are connected with a null line, the three branches are connected with the pin 4 of the rectifier bridge stack to form a loop. The branch 1 is connected in series with a capacitor C1. The branch 2 is connected in series with D1 and the capacitor CR1. The branch 3 is connected in parallel with the capacitor CS1 and the resistor RS2 and then is in series connection with D2. The control circuit is capable of prolonging power supply maintenance time after power off without large-capacity energy storage element, and thus the structure is reduced greatly.

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