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Article #2784Re: Thyristors and triacs
From: Eeyore
Date: Sat, 05 Aug 2006 07:47
Date: Sat, 05 Aug 2006 07:47
33 lines
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2426 bytes
"Paul E. Schoen" wrote: > "Jamie" <jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote in message > news:KiRAg.50$zK3.38@fe03.lga... > > ib.mossin@hotmail.com wrote: > >> Hi, > >> > >> I'm trying to figure out how thyristor and triacs work. I understand > >> that a thyristor conducts when it's gate recieves a current pulse and > >> continues to conduct as long as forward biased. How does this differ > >> from a ordinary bijunction transistor operating in cutoff and > >> saturation with base working as "the gate"? > >> > >> A triac is two thyristors connected together. Right? I don't see the > >> practical use for such a device. Can you give me a hint? > >> > >> Best regards, John > >> > > almost.. > > thyristor latches and maintains when you remove the current > > from the gate that switched it on. > > what opens the thyristor is when the current flowing through > > its Anode and cathode falls below the holding spec.., at that point > > is when the thyristor will thus open .. > > I'd still like to know why my SCR conducts in both directions with only a > positive gate signal. Or negative even ! Graham
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X-Google-Thread: 112d1e,c1fd2630312049cf X-Google-Thread: 10ea85,e666da80ef4f565d X-Google-Attributes: gid112d1e,gid10ea85,public X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news2.google.com!news3.google.com!news4.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!t-online.de!feeder.news-service.com!nntp-peering.plus.net!ptn-nntp-feeder03.plus.net!ptn-nntp-spool02.plus.net!ptn-nntp-spool01.plus.net!ptn-nntp-reader02.plus.net!not-for-mail Message-ID: <44D44D15.D413D8BE@REMOVETHIS.hotmail.com> Date: Sat, 05 Aug 2006 08:47:33 +0100 From: Eeyore <rabbitsfriendsandrelations@REMOVETHIS.hotmail.com> Organization: gloomy place X-Mailer: Mozilla 4.8 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 Newsgroups: sci.electronics.design,dk.admin Subject: Re: Thyristors and triacs References: <1154722762.371469.113340@i42g2000cwa.googlegroups.com> <KiRAg.50$zK3.38@fe03.lga> <44d43d45$0$2927$ecde5a14@news.coretel.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 34 NNTP-Posting-Host: 1368fb0e.ptn-nntp-reader02.plus.net X-Trace: DXC=Ej@4a3aA`aRkGVjNLM0KIVigd3Y`7Rb;^37XnI;[OUCTl6nAZGQhVf[oBIE?_[CZDUmG7i5Q89SGPAQhjcYk^ZJ_ X-Complaints-To: abuse@plus.net