From: "Tom Del Rosso"
References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <7tGLdeAS6fn9EwBv@jmwa.demon.co.uk> <3ZKcndAgKa3r71qgXTWc3Q@comcast.com>
Subject: Re: Best way to power array of LEDs?
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
NNTP-Posting-Date: Tue, 05 Nov 2002 09:05:12 GMT
Organization: AT&T Worldnet
Date: Tue, 05 Nov 2002 09:05:12 GMT
"Dave VanHorn" wrote in
> 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,
> safe maximum.
> When you apply a load, the system voltage begins to droop, and the
> regulator applies more current to the alternator's field coil (which
> rotating one) This causes more current out the stator coils 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
> The engine will be less loaded when there is less load on the
> 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
> > 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
> Now, the computer maintains idle at a preset speed pretty well, unless
> something's very wrong with the system.