Does rebuilding an electric motor reduce its efficiency?

A common concern when considering whether to replace or repair an electric motor is efficiency. If repairing a motor leads to reduced efficiency, then there is significantly less appeal in paying for repairs. Repairing an electric motor can be much less expensive than replacing one, but a common concern is that if efficiency is not maintained, the money saved by repairing a motor will eventually be lost in utility costs.

According to a 2008 study by the Electro-Mechanical Authority (EASA) and the Association of Electrical and Mechanical Trades (AEMT), electric motors can maintain efficiency after being repaired/rewound. Even after multiple rewindings, motor efficiency is not reduced, as long as best practices for repair are properly followed.

Brooks Motor & Electric is an EASA certified repair facility, so our customers can rest assured that our repair shop always meets the best practices that are necessary to maintain efficiency, even after rewinding/repairing a motor multiple times.

Rewinding an electric motor does not decrease its efficiency.

For more information about the effects of repair on motor efficiency, visit the EASA website.

A copy of the study referenced in this article can also be downloaded in PDF format from the EASA website. Download