China Emergency Light Manufacturers , Emergency Light Inverter Circuit
Emergency light working principle
China Emergency Light Manufacturers stated that the 220V AC power supply is stepped down by C1 (R1 is bleeder resistance), VD1~VD4 is rectified, and C2 is filtered to provide a DC current of about 100mA to the electromagnetic relay J with the switching contact. J-1 is turned on, and the charging circuit is isolated by the VD5 to charge the battery GB. LED1 and LED2 are on, indicating that charging is in progress.
When the utility power fails, J loses power J-1 and returns to the lighting circuit to disconnect the charging circuit. At this time, S1 and S2 can be respectively turned on to illuminate the emergency lighting of the incandescent electric beads EL1 and EL2.
Emergency light inverter circuit
China Emergency Light Manufacturers said that to make an inverter power supply, in the event of a power outage, the DC power is inverted into 220V AC. In fact, this practice is outdated, because with the development of LED lights, DC 12V LED lights can now be directly used, no need to invert, when the power is off, directly use the battery to light the LED lights. When there is electricity, charge the battery and supply power to the LEDs. This makes the circuit simple, the reliability is improved, and the use efficiency is improved.
Inverter emergency light circuit
This paragraph is not isolated from the mains, pay attention to safety, the wires should not be exposed, should be installed in the box, the output part of the voltage is high, should be careful to get an electric shock. There is also a 1M discharge resistor between the two lines at the input end to prevent electric shock from being discharged after being pulled out. Remember!
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