stamps and SCR''s
Chris,
I don't think you'll have much luck with phase angle firing with a Stamp
because of the speed. Each cycle of 60hz only takes ~16mS and the
instruction time on a stamp is around a mS. The math ain't too good. With
three phase the problem is worse. Someone may have figured a way around
this but I haven't seen it.
At 01:34 PM 12/5/00 -0400, you wrote:
>Lee:
>
>Thanks. I'm already using opto's for control of 120V relay coils. I
>should have been more clear. My focus is on Phase angle firing of
>the SCR's with the stamp output. I would like to accomplish this
>with single phase and three phase back-to-back SCR arrangements. Is
>this an unusual application for a stamp?
>
>Chris
Lee Harker
258 Metals Development
Ames Laboratory
Iowa State University
I don't think you'll have much luck with phase angle firing with a Stamp
because of the speed. Each cycle of 60hz only takes ~16mS and the
instruction time on a stamp is around a mS. The math ain't too good. With
three phase the problem is worse. Someone may have figured a way around
this but I haven't seen it.
At 01:34 PM 12/5/00 -0400, you wrote:
>Lee:
>
>Thanks. I'm already using opto's for control of 120V relay coils. I
>should have been more clear. My focus is on Phase angle firing of
>the SCR's with the stamp output. I would like to accomplish this
>with single phase and three phase back-to-back SCR arrangements. Is
>this an unusual application for a stamp?
>
>Chris
Lee Harker
258 Metals Development
Ames Laboratory
Iowa State University