Hello,
I want to build a circuit with triac's to control power contactors and valves. For the power supply I want to use a simple capacitive power supply.
Because of the low current load I can't take advantage of only triggering the triacs during current crossing. Therefore I would have to drive the gate permanelty with about 10-20 mA. But thats too much for a multiple triacs with a simple capacitive power supply. The holding current for standard triacs from ST for exmaple (ACS AC Switch) is abount the same as the load itself especiall for driving the power contactors. I looked at phototriacs, these have much lower holding currents but I don't need any isolation and I rather drive the triac directly. What is the best way to solve this.
[Valves]
Power supply 230V/50Hz
Inrush 24 VA
Hold 17 VA
[Power Contactors]
Power supply 230V/50Hz
Inrush 24 VA
Hold 3,4 VA
Best regards
I want to build a circuit with triac's to control power contactors and valves. For the power supply I want to use a simple capacitive power supply.
Because of the low current load I can't take advantage of only triggering the triacs during current crossing. Therefore I would have to drive the gate permanelty with about 10-20 mA. But thats too much for a multiple triacs with a simple capacitive power supply. The holding current for standard triacs from ST for exmaple (ACS AC Switch) is abount the same as the load itself especiall for driving the power contactors. I looked at phototriacs, these have much lower holding currents but I don't need any isolation and I rather drive the triac directly. What is the best way to solve this.
[Valves]
Power supply 230V/50Hz
Inrush 24 VA
Hold 17 VA
[Power Contactors]
Power supply 230V/50Hz
Inrush 24 VA
Hold 3,4 VA
Best regards