115v ac induction motor binds under power
115v ac induction motor binds under power
(OP)
I have a .75 hp electric motor that hums when power is applied. But unlike other motors like this one, If you apply power and try to spin it (by hand), you find it tight and slow to spin. It is free before power is applied. I did replace the capacitor with one from a .5 hp motor and it started once. Any idea why it binds under power ?





RE: 115v ac induction motor binds under power
If you are mechanically inclined you can remove the non-drive end bell housing and look at the mechanism. Often times they just get gummed up with crud, so a little electrical spray cleaner will free up the mechanics and get you running. If not, you can often order a new centrifugal switch if the motor is not too old. Or just take it to a motor shop and have them do it.
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" We are all here on earth to help others; what on earth the others are here for I don't know." -- W. H. Auden
RE: 115v ac induction motor binds under power
While some motors may lock up with a broken centrifugal switch, I have seen many motors with a broken switch started by spinning the motor. These motors work until someone makes a mistake and then the smoke comes out.
Bill
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"Why not the best?"
Jimmy Carter
RE: 115v ac induction motor binds under power
After testing the ohm's with my meter, And if I understand correctly, the non switched full time hot wire was connected to the windings with the highest ohm's and the switch and cap were wired to the lower ohm's windings. Reversed ?
I swapped the wiring and then learned that the switch was in fact open. No idea as to how bending the steel contact disk will work out. (no other adjustment otherwise as far as I can tell) Working the switch with a screw driver, the motor seems to run well enough.
Thanks to you both for your replies.
RE: 115v ac induction motor binds under power
Bill
--------------------
"Why not the best?"
Jimmy Carter