Electric motors

Hey Mike,

I hope you and everyone had a good holiday. I've been doing generator stators & rotors lately. They're all dipped in a bucket of varnish and then baked in an oven when they're first made. The idea is to keep all the windings in place when the machine is running. Basically the same idea with electric motors that are varnished. It helps protect the windings.



Got 11 lbs of copper out of an 8 KW home standby generator a couple of days ago. Had one that was 24 lbs once. Most portables are about 7 lbs .... though i'm seeing more & more wound with aluminum these days.

You don't have to worry about the string if it's going as #2 copper. A fussy scale guy might complain about the insulated wires that are held in place by the string. It's easy enough break varnished string by pounding the motor winding with a hammer.

Look at the way that the winding is bent over on the end of the motor. Hit it sideways and bend it up straight. The windings pull out easier if they've been pounded on and loosened up some.

Originally Posted by hills

Hey Mike,

I hope you and everyone had a good holiday. I've been doing generator stators & rotors lately. They're all dipped in a bucket of varnish and then baked in an oven when they're first made. The idea is to keep all the windings in place when the machine is running. Basically the same idea with electric motors that are varnished. It helps protect the windings.

Got 11 lbs of copper out of an 8 KW home standby generator a couple of days ago. Had one that was 24 lbs once. Most portables are about 7 lbs .... though i'm seeing more & more wound with aluminum these days.

You don't have to worry about the string if it's going as #2 copper. A fussy scale guy might complain about the insulated wires that are held in place by the string. It's easy enough break varnished string by pounding the motor winding with a hammer.

Look at the way that the winding is bent over on the end of the motor. Hit it sideways and bend it up straight. The windings pull out easier if they've been pounded on and loosened up some.

Yes good Christmas had ham.generator has a dc motor yea? Those have a higher copper content I read I think then fractionals then regular ac motors dc motors suck. I have two that are 1/10th HP and are wound like a ceiling fan motor but are from a furnace motor so that's different.