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Good Practice Guide to Maintain Motor Efficiency

Based on the 2019 and 2003 Rewind Studies of premium efficiency, energy efficient, and IE2 (formerly EF1) motors

  • January 2021
  • Number of views: 1917
  • Article rating: 5.0

Intended primarily for service center personnel, the guide which is now an independent document and not part of the complete EASA/AEMT rewind study report, outlines the good practice repair methods used to achieve the results given in both studies. It contains repair tips, relevant motor terminology, and information about sources of losses in induction motors that affect efficiency.

Fact or Myth: Common Misconceptions About Motors

  • January 2021
  • Number of views: 1056
  • Article rating: 3.7

Here is a random collection of some relatively common misconceptions about three-phase squirrel cage motor performance characteristics.

Mito o Realidad: Conceptos Errados Comunes Sobre Motores Eléctricos

  • January 2021
  • Number of views: 711
  • Article rating: No rating

Aquí tenemos una colección de algunos de los conceptos errados más comunes acerca de las características de desempeño de los motores eléctricos tipo jaula.

Rewind Study 2020: The Results Are In

The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors

  • December 2020
  • Number of views: 1665
  • Article rating: 4.0
Webinar recording

This webinar covers the results and the technical details of the recently completed follow-up to the 2003 EASA/AEMT Rewind Study.

Usual & Unusual Service Conditions for Motors and Generators

  • September 2020
  • Number of views: 676
  • Article rating: No rating

What are the normal conditions for which a motor is designed? This is a question that does not often come up except when there is an issue with a motor application.

Condiciones de Servicio Normales + Inusuales en Motores y Generadores

  • September 2020
  • Number of views: 677
  • Article rating: 2.0

¿Cuáles son las condiciones normales para las que está diseñado un motor eléctrico? Esta es una pregunta que no surge muy a menudo, excepto cuando existe un problema con la aplicación.

Fundamentos de los Motores Sincrónicos

  • July 2020
  • Number of views: 636
  • Article rating: No rating

Los avances en la electrónica de potencia en las últimas décadas han permitido el uso de una variedad de máquinas eléctricas rotativas que de otro modo no sería factible. Una de ellas se denomina máquina de reluctancia debido a la forma en la que dichas máquinas producen un torque electromagnético. Una máquina de reluctancia es una máquina eléctrica en la cual el torque se produce por la tendencia de su parte móvil a moverse a una posición donde se maximiza la inductancia del devanado excitado.

Determining Impeller Trim Diameters for Pump Re-Applications

  • June 2020
  • Number of views: 842
  • Article rating: No rating
FREE for Members of EASA
Convention presentation

Whether it is a simple re-application of a pump from 50 Hz to 60 Hz (or vice versa), the repurposing of an existing pump, or the application of a new pump to an existing application, determining the proper trim for an impeller can be challenging.

Getting to Know Reluctance Machines

  • June 2020
  • Number of views: 556
  • Article rating: No rating
FREE for Members of EASA
Convention presentation

This recording explores features of synchronous and switched reluctance machines.

Vertical Motor Operation and Repair

  • June 2020
  • Number of views: 1821
  • Article rating: 5.0
FREE for Members of EASA
Convention presentation

Vertical motors differ from horizontal motors in numerous ways, yet some view them as “just a horizontal motor turned on end.” The obvious differences are the (usually) thrust bearings, with arrangements varying from single- to three-thrust bearings with different orientations suited for specific load, rpm and applications. Less obvious differences are in the ventilation arrangements, shaft stiffness, degrees of protection and runout tolerances. This recording will cover those topics.

Getting The Most From Your Electric Motors

Getting The Most From Your Electric Motors - coverThis 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:

  • Installation, startup and baseline information
  • Operational monitoring and maintenance
  • Motor and baseline installation data
  • How to read a motor nameplate
  • Motor storage recommendations



EASA/AEMT Rewind Study

EASA Rewind Study cover

The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.


ANSI/EASA AR100-2020

ANSI/EASA AR100-2015 cover

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.



EASA Technical Manual

EASA Technical Manual cover

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.