25 Feb
2012
25 Feb
'12
12:26 a.m.
On 2/23/12 2:51 PM, Tim Cunningham wrote:
I have rewound a few of these motor coils and a #24 to #26 gauge enamel wire should work. A #22 gauge enamel wire would be too large and you would not be able to wind the same number of turns.
It is the breakdown of the enamel due to wire heating that makes them fail by creating a short circuit in the windings.
I don't remember the wire size I used (it's been over 20 years) but you're right about the short circuit. Just one shorted turn will form the shorted secondary of a transformer, and the I^2R losses in that turn will create quite a bit of heat that will further damage the insulation on the nearby windings until the whole thing is toast.