wedges out of rotor
wedges out of rotor
(OP)
We have rewind a dc motor 400 KW and 1000 rpm, and after rewind the rotor we mount it on the application, after one week we find some wedges out.from the rotor... the insulation was ok, cause we have this problem in two times.... we use fiber wedges,.. could you recommend some kind of wedges or some tip...... or link.... maybe is a question of the vernis....??





RE: wedges out of rotor
RE: wedges out of rotor
What's a "vernis"
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RE: wedges out of rotor
RE: wedges out of rotor
RE: wedges out of rotor
Could you send me a link to some info about the g11 wedges....?
thanks a lot
RE: wedges out of rotor
I guess your location is France...yes? The attachment ought to help you out with info on G-11 laminates (BTW, I think "Vonn Roll" still have an office in Delle).
Polyester based varnish is fine for most dip & stove applications (stators), in the absence of a VPI system maybe you could double-dip larger rotors/armatures.
RE: wedges out of rotor
RE: wedges out of rotor
thanks
RE: wedges out of rotor
As I said VPI is the best method but if you don't have VPI then dip varnish is your only alternative.
You are quite right that if an armature (or stator for that matter) has been dip varnished well enough, then a second dip is unlikely to achive any penetration. It will however contribute to the overall mechanical strength of the winding.
Warming the armature slightly before dip varnishing will increase penetration, but on the other hand it can degrade varnish quality and affect the hardening process. Its kind of a playoff. Maybe it would be an idea to speak to your supplier & ask if your present varnish is suitable for your needs?
RE: wedges out of rotor
thanks a lot....
RE: wedges out of rotor