What makes a good electric motor repair shop?
High-quality motor shops are procedure driven and never rely solely on the skills and experience of shop technicians. These providers have developed detailed procedures covering electric motor repairs and document each step of the repair process.
How does a motor rewind repair shop work?
Repair shops often can’t get complete specifications from manufacturers. The repair shop must “reverse engineer” motors; this process involves counting winding turns, noting slot patterns, measuring wire size, etc., before removing old windings. Sometimes a motor has failed repeatedly in the past because of a previous non-standard re-wind.
How to repair and refurbishment an AC induction motor?
The repair and refurbishment of an ac induction motor should include the following steps: 1. Perform a visual inspection to assess the general condition of the motor. Check for cracks, broken welds, and missing parts. Photographs are required in some cases prior to disassembly of the motor to document the motor construction and accessories.
How often do electric motor repair shops recertify?
Many shops also participate in continuous improvement efforts and undergo recertification every year or two. Electric motor repair shops with an ongoing commitment to high-quality standards are the ones most likely to earn certification. This was the case with Electrical Repair Service Co., Inc. of Birmingham, Ala.
Can a repair shop test an electric motor?
Qualified shops are equipped to test-run electric motors at rated voltage because tests at reduced voltage may fail to reveal certain problems. A few select motor shops have earned special certification in motor rebuild and repair from motor and rotating-equipment technology companies.
Repair shops often can’t get complete specifications from manufacturers. The repair shop must “reverse engineer” motors; this process involves counting winding turns, noting slot patterns, measuring wire size, etc., before removing old windings. Sometimes a motor has failed repeatedly in the past because of a previous non-standard re-wind.
Is there a decrease in electric motor repair?
Data from one of the company’s paper mills is particularly encouraging. Between 2006 and 2007, purchases of new motors decreased by 39%, and repair purchases decreased by 45%. The number of AC motor repairs dropped by 33% and DC motor repairs by 32%.
What to do with a failed electric motor?
A motor failure / burnout produces two alternatives: Rewind the failed motor OR Purchase a new motor.