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SCR controlled bilge pump
Check out this link for an explanation of how an SCR works.
http://www.allaboutcircuits.com/vol_3/chpt_7/5.html The Silicon-Controlled Rectifier (SCR) - Chapter 7: THYRISTORS - Volume III - Semiconductors Chuck Offbreed wrote: Well, yes, that can be a problem, but I think SCRs can be shut off by changing the bias of the gate circuit. ... |
#2
posted to rec.boats.electronics
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SCR controlled bilge pump
chuck wrote:
Check out this link for an explanation of how an SCR works. http://www.allaboutcircuits.com/vol_3/chpt_7/5.html The Silicon-Controlled Rectifier (SCR) - Chapter 7: THYRISTORS - Volume III - Semiconductors Good page. Thanks. I had class time on SCRs, but never messed with them in the shop and that page brings it back very nicely. Valid summary?: The only ways to shut down the SCR involve reducing the current flow through the SCR, and the simplest is to have the shut off switch shut off the full current and accept the reduced life on that switch. I suppose momentary short around the SCR, or a pulse, would also work, but I don't see any simple and reliable way to do that. None that don't make me cringe. Another reason to get the extra switch and make a high water alarm. |
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