3 phase contol for phase shift of scr's

Michael_defalco

Hello:

I am trying to see if I can use a propeller to synchronously control firing signal to a set of 3 phase scr's to fire a
welding control.

Just not sure if the propeller is the right choice?

Any input is appreciated-MD

Michael_defalco

Or as it can be said-a single pulse from 3 seperate outputs at 120 degrees.
Just want to clarify details from industry jargon...MD

Mike Green

The Propeller should be fine. It can do timing with a resolution of 12.5ns. You'll need an output for each phase plus an input for the zero-crossing detection. Your biggest design task will be keeping the noise from the power switching out of the Propeller's power supply and signal lines.

Michael_defalco

Thanks for the information!