Hi, I have a recurrent problem about dimmer (triac moc) circuit. Too much noise on the AC when light is setting on specific phase. I had isolated the problem but it’s hard to resolve it !!
When I use one of the tri-phase AC alimentation with 1000w bulb some of the other bulb powered with another phase light up. Only when the first one is set on 1/3 of the phase… !
I saw 3.5 volts mini peak noise between the pin 1 of triac (gate pin) and pin 4 of the moc when light is working on higher amplitude of other phase… just enough to trigger the triac gate pin.
I tried to use inductor choke on it (between triac and moc) and put RC filter…. No good news…
Have you any suggestion ? Thanks !
When I use one of the tri-phase AC alimentation with 1000w bulb some of the other bulb powered with another phase light up. Only when the first one is set on 1/3 of the phase… !
I saw 3.5 volts mini peak noise between the pin 1 of triac (gate pin) and pin 4 of the moc when light is working on higher amplitude of other phase… just enough to trigger the triac gate pin.
I tried to use inductor choke on it (between triac and moc) and put RC filter…. No good news…
Have you any suggestion ? Thanks !
