Bordodynov
- Joined May 20, 2015
- 3,426
Two reasons causing a current surge. If the connection fails (this is when the voltage of the power supply is important at the moment of connection, then the triac turns on automatically.) The method of combating this is the connection between the control leads of the resistor (in my scheme it is R4 = 51 Ohm). Another source of the initial throw can be an additional circuit , consisting of a series-connected capacitor and a resistor R3 and C3.Methods to combat the harmful effect: 1. Add a 51 ohm resistor 2. Transfer the capacitor with a resistor in parallel to the input terminals of the diode bridge.