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Feeding solar power back into municipal grid: Issues and finger-pointing - Page 10

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Posted by vaughn on April 12, 2011, 12:09 am



Posted by sno on April 12, 2011, 6:21 am
On 4/11/2011 6:16 PM, krw@att.bizzzzzzzzzzzz wrote:

I think you are pushing it....the brushes on a dc motor "guide" the dc
to different windings.....it is still dc...

In an ac motor the windings are generally in parallel...all the ac is
applied at one time....

I think I got that right....is a long time since I covered motor
theory..<grin>...the ac is not "chopped up"....or guided anywhere....

You could say that all electric motors operate the same....as they all
depend on magnetism (all generally used motors...there are some operate
on static electricity, etc)
have fun...sno

Correct Scientific Terminology:
Hypothesis - a guess as to why or how something occurs
Theory - a hypothesis that has been checked by enough experiments
  to be generally assumed to be true.
Law - a hypothesis that has been checked by enough experiments
  in enough different ways that it is assumed to be truer then a theory.
Note: nothing is proven in science, things are assumed to be true.

Posted by krw@att.bizzzzzzzzzzzz on April 13, 2011, 4:00 am

No, it most definitely is *not*.  Turn the motor to the next commutator step
and you'll see that the current reverses in the winding.

That's why there are no brushes in AC motors?  ;-)

...and you need a rotating magnetic field.  That is, you need AC.  ;-)

Posted by David Nebenzahl on April 11, 2011, 10:29 pm
 On 4/11/2011 2:42 PM Evan spake thus:

... especially when it's pure BS. But that's our Harry.

Welll, since this is a.h.r, and since you're picking a nit, let me pick
yours. I've installed several "higher-end" vent fans (Panasonic), all of
which use AC induction motors which are very quiet. Which bath fans use
the setup you described? (Besides which, why in the world would you need
an "inverter" to run a DC motor from an AC supply? Perhaps you meant

The current state of literacy in our advanced civilization:

   wan2 hang

- from Usenet (what's *that*?)

Posted by krw@att.bizzzzzzzzzzzz on April 13, 2011, 4:02 am


Correct.  David should refrain from any EE lectures.  He hasn't got it in him.

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