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Thread: Motor speeds and vibrations
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19th Dec 2014, 10:49 AM #46
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19th Dec 2014, 12:22 PM #47Most Valued Member
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What does it matter if the cat is black or white, as long as it catches mice......
PDW
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19th Dec 2014, 06:01 PM #48Member
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Hello all, first post.
Two things cause vibration from electric motors, first is out of balance of the rotating mass, unlikely at the normal speed of the motor,second is magnetic imbalance between the windings.
Magnetic imbalance is more likely as there are many things that can cause it.
A very simple way of finding out if this is likely and is only observable with belt drives is to watch the behavior of the belts when the motor is running. if the belt or belts are vibrating but stop vibrating when you switch off the motor and the revs drop then it indicates a high frequency speed variation per rev. Indication of magnetic imbalance.
A site to read more: http://www.pdma.com/pdfs/Articles/Id...e_Analysis.pdf
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