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A question about coil winding - Page 7

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Posted by Josepi on December 17, 2009, 2:33 pm
 


The heat disapation is not a big feature of the varnish but nevertheless, is
there.
Varnishing the coils before placement is not really possible as the coils
become stiff and still need to be bent into place in the laminations.
Trouble is wih varnishing after is the clean up of the laminations becomes a
pain. Lots of fishpaper /Hytex lamination covers and wedges usually locks
the windings down enough without varnish but the varnish glues it all
together so vibration doesn't result in a flying piece of paper inside.

Josepi wrote:


When you are winding coils, you most certainly can brush or spray the
Glyptal on each layer before starting the next one. Take it slow and you
won't even get your fingers covered like I did.

Secondarily, I am not aware of ANY varnish type coatings that help to
carry heat away from the wire. Every coating I am aware of acts as an
insulation to some degree. Some web sites talk of 'special resins' with
certain fillers which help in heat conductivity. I don't know anything
about them.

Centrifugal force may be a bigger danger than vibration. Now, having
said that, there MAY be a particular RPM where a resonance is set up in
the coils. Thee should be a way of testing for that before any sort of
mass production takes place.



mike




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Posted by The real Edmond H. Wollmann on December 19, 2009, 8:38 am
 

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Posted by harry on December 19, 2009, 6:00 pm
 

On Dec 19, 8:38 am, "The real Edmond H.  Wollmann"

English...heehee....Now look at the guy above^  He said: "heat disapation".

here, how can you let an alien beat you huh?

They're only poor Yanks.  They spell lots of word wrongly in America.

Posted by John Fields on December 19, 2009, 8:51 pm
 

On Sat, 19 Dec 2009 10:00:00 -0800 (PST), harry


English...heehee....Now look at the guy above^  He said: "heat disapation".

born here, how can you let an alien beat you huh?

Should be 'words', actually.

JF

Posted by m II on December 20, 2009, 7:06 am
 

John Fields wrote:


Prepositions are not your strong point, are they John?



mike

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  / /\  / /\  / /\  / /\  / /\  / /\  / /\  / /
 / /\ \/ /'Think tanks cleaned cheap' /\ \/ /
/_/  \/_/  \/_/  \/_/  \/_/  \/_/  \/_/  \/_/

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