SEARCH THE RESOURCE LIBRARY
Full Rewind Study Results Now AvailableTests prove proper repair/rewind practices maintain the efficiency/reliability of Premium Efficiency/IE3 motors.
DOWNLOAD THE FULL REPORT
Discounted Training OpportunityLooking for cost-effective education? Look to EASA for a limited time offer on deeply discounted bundles of webinar recordings.
Need an Accredited service center?Find a service center that has proven they repair electric motors in accordance with ANSI/EASA's AR100.
VIEW THE LISTLEARN MORE ABOUT THE PROGRAM
ACCREDITED? VIEW YOUR RECORDS
Book Your Room NowIt's not too early to reserve your room at one of EASA's official Fort Worth hotels Don't wait to save your place at the 2021 Convention & Solutions Expo.
RESERVE A ROOM
Engage locallyEASA's international membership is divided into 10 Regions that are made up of 32 Chapters.
EXPLORE CHAPTERS & EVENTS NEAR YOU
SEARCH THE ONLINE STORE
EASA Resource GuideA handy, downloadable PDF booklet summarizing the products and services available from EASA.
CUSTOM BRANDED PRODUCTS
EASA Senior Technical Support Specialist
One of the pleasures of helping EASA members is in discovering challenges or specific areas where we can improve on the original design of the motor manufacturer. The most recent of these, for me, has been a noticeable cluster of calls about motors with multiple windings. The call usually starts with something like this: "We wound this motor, and one speed was terribly burned." Another one I often hear is: "We rewound both speeds, and the surge test pattern for one speed indicates a winding problem." These are but a couple of examples of a design issue we are seeing with motors having more than one winding. While the use of variable-frequency drives (VFDs) is increasingly common, there are still applications using 2-speed, 2-winding motors. Cranes are a good example of one such application. When a core has more than one winding, the two windings behave as a transformer. Applying voltage to either winding induces voltage in the other winding because the two windings are inductively coupled. As long as both windings are connected 1 wye, and the leads of the second winding are left open, no magnetizing current is drawn by the second winding. When both windings are conventional and symmetrical, this arrangement works just fine. The problems start when either winding deviates from the symmetry that is so important to 3-phase motor performance.
Topics covered include:
LOGIN TO DOWNLOAD THE ARTICLE
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:
LEARN MORE AND DOWNLOAD MÁS INFORMACIÓN Y DESCARGAR BUY PRINTED COPIES
READ MORE ABOUT THE FEATURES AND BENEFITS
The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.
DOWNLOAD THE FULL RESULTS
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.
DOWNLOAD - ENGLISH
DESCARGAR - ESPAÑOL
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.
VIEW & DOWNLOAD