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Article #157Re: Best way to power array of LEDs?
From: Tom Del Rosso
Date: Tue, 05 Nov 2002 09:05
Date: Tue, 05 Nov 2002 09:05
41 lines
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3384 bytes
"Dave VanHorn" <dvanhorn@cedar.net> wrote in message news:3ZKcndAgKa3r71qgXTWc3Q@comcast.com... > > The alternator is only part of the system. > The voltage regulator does the controlling. > It limits the output of the alternator, both in current, and voltage, to a > safe maximum. > > When you apply a load, the system voltage begins to droop, and the voltage > regulator applies more current to the alternator's field coil (which is the > rotating one) This causes more current out the stator coils and diodes, and > brings up the system voltage. > > You can think of the alternator as a current amplifier, powered by > mechanical energy. > > The alternator will run cooler at lighter loads, since less current is > flowing. > The engine will be less loaded when there is less load on the alternator. > 700W is about 1HP, so that's why you don't really notice it much. I had no idea a car's regulator used a feedback path through the alternator. > > In other words does a generator precisely convert a higher > > load current into more mechanical resistance? > > Both generators and alternators do this, by different means. > > Before computer driven engines, you used to notice the loading effect more. > Now, the computer maintains idle at a preset speed pretty well, unless > something's very wrong with the system. Thanks Dave.
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 112d1e,4ef4c9d4aea85e1f X-Google-Attributes: gid112d1e,public X-Google-Thread: 10d137,4ef4c9d4aea85e1f X-Google-Attributes: gid10d137,public X-Google-Thread: 1118be,4ef4c9d4aea85e1f X-Google-Attributes: gid1118be,public X-Google-Thread: 1131b0,4ef4c9d4aea85e1f X-Google-Attributes: gid1131b0,public X-Google-Thread: 103407,4ef4c9d4aea85e1f X-Google-Attributes: gid103407,public X-Google-ArrivalTime: 2002-11-05 01:05:13 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!canoe.uoregon.edu!arclight.uoregon.edu!wn13feed!wn14feed!wn12feed!worldnet.att.net!bgtnsc05-news.ops.worldnet.att.net.POSTED!not-for-mail From: "Tom Del Rosso" <please-no.spam.tdnews@att.net> Newsgroups: sci.electronics.components,sci.electronics.design,alt.engineering.electrical,aus.electronics,sci.electronics.repair References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <Rsan9.14070$qh1.1622310@news.ca.inter.net> <ank9ep$lumv$1@hades.csu.net> <anku2n$5so$1@news.wave.co.nz> <7tGLdeAS6fn9EwBv@jmwa.demon.co.uk> <apvlvu$n2c$1@reader1.panix.com> <aq0h2t$nv1$1@thorium.cix.co.uk> <us7t1tk9t9t795@corp.supernews.com> <J_xx9.45419$Mb3.2215008@bgtnsc04-news.ops.worldnet.att.net> <useffdcqh8hne7@corp.supernews.com> <uMIx9.46613$Mb3.2298793@bgtnsc04-news.ops.worldnet.att.net> <3ZKcndAgKa3r71qgXTWc3Q@comcast.com> Subject: Re: Best way to power array of LEDs? Lines: 44 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Message-ID: <cRLx9.26452$VJ5.1622624@bgtnsc05-news.ops.worldnet.att.net> NNTP-Posting-Host: 8d6fde632602e633df00147fac613f69 X-Complaints-To: abuse@worldnet.att.net X-Trace: bgtnsc05-news.ops.worldnet.att.net 1036487112 8d6fde632602e633df00147fac613f69 (Tue, 05 Nov 2002 09:05:12 GMT) NNTP-Posting-Date: Tue, 05 Nov 2002 09:05:12 GMT Organization: AT&T Worldnet Date: Tue, 05 Nov 2002 09:05:12 GMT