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Tyler Voss Membership & Communications Specialist+1 314 993 2220tvoss@easa.com
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Chuck Yung EASA Senior Technical Support Specialist
You've just dismantled a special motor for a customer, and the core test indicates the watts loss/pound is excessive. The high core losses are caused by shorts between the laminations. This may be the result of a ground failure. Or excessive temperatures may have caused the deterioration of inter-laminar insulation (called coreplate.)
Whatever the cause, a replacement is 16 weeks away, and your customer wants his motor repaired. This motor sounds like a prime candidate for a restack, but you are hesitant. Your company has a reputation for quality, and the finished product has to meet your usual high standards.
You want to know the best procedure for repairing this core. Here are some guidelines to help you do the best possible repair.
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This 40-page booklet provides great advice for obtaining the longest, most efficient and cost-effective operation from general and definite purpose electric motors.
This booklet covers topics such as:
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The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.
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Recommended Practice for the Repair of Rotating Electrical Apparatus This is a must-have guide to the repair of rotating electrical machines. Its purpose is to establish recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.
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Revised May 2024 The EASA Technical Manual is the association's definitive and most complete publication. It's available FREE to members in an online format. Members can also download PDFs of the entire manual or individual sections.
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