On Tue, 28 Oct 2003 21:16:37 -0800, "william_b_noble"
wrote:

ok, you asked. these are triac based controls that duty cycle modulate the
input AC power - basically they delay the turn on of the AC to the motor
until a desired phase angle is reached - the later the turn on (each half
cycle) the less power is delivered to the motor. It's the same as a lamp
dimmer, but with a few parts (and a more rugged triac) to accommodate the
reverse voltage from the inductance of the motor. I have a few spare
controls scrapped from drills - if you want one, I'll send you one for a
couple of $$ postpaid.


Thanks for the good explanation. So the output is intermittent 60
cycle 115V AC. That explains why they do not overheat the windings.

I can answer the question with confidence now. And thanks for the
generous offer, I like the packaging and switching concept (off, full,
variable) on the one I referenced so if I were going to use one I'd
probably just pick one of those up.



-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----