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Motor windings

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trebor28/08/2015 14:29:47
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1930 forum posts
216 photos

My poor old motor started jamming up so I pulled it appart for a look inside. I removed small grit like iron pieces which had become attached to the magnets. After cleaning I noticed some of the windings loose and moving about, the question is what can I stick them down with ? Would I be ok with varnish or even super glue ? Not sure what super glue would do to the winding protective insulator though. dont know

Plummet28/08/2015 15:44:22
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1418 forum posts
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Whatever you use has to be compatible with the insulation on the wires. The wires are usually coated with some form of varnish to insulate each turn from the next. It used to just be the old fashioned oil based varnish - in the olden days when I was a lad. What they use now - ???

So - the answer is the usual - test it first. I (and probably you) have no way of knowing what the manufacturer used.

Do you have a similar motor in your scrap box? If so, experiment with that. Failing that - you have one try!

Plummet

John Rudd28/08/2015 17:00:25
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If its a relatively modern motor then chances are its wound with enamelled copper with a coating of a polyesterimide or modified polyester base coat which is fairly inert to most chemicals....I've successfully used polyester resin before today to secure windings on rotos on generators that I have rewound...alternatively you could just use epoxy....

Edited By John Rudd on 28/08/2015 17:00:47

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