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Revisit the 2021 ConventionIf you purchased a convention registration with access to the education events - or if you were an exhibitor - you now have access to watch recordings of the events. Download the handouts and technical papers, too.
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EASA Senior Technical Support Specialist
Once upon a time, DC motors operated from batteries or motor-generator sets. For the past 50+ years, most DC motors have operated from solid state power supplies – rectifying AC power to DC power. When motors began operating from rectified power, one of the problems experienced was the presence of AC “ripple” in the leads that were supposed to deliver DC power to the machine. Absent a specific standard, a recurring question is: “How much is too much?” Before I try to suggest an answer to that question, let’s talk about what AC ripple is and explain why it is not desirable.
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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 2021
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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