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NOTICE: EASA will be disabling the online database functionality for Version 4 of the AC Motor Verification & Redesign software on Oct. 1, 2026.
Users can either switch to the local database, or begin using EASA's Motor Winding Workbench. For help or questions, contact gvogel@easa.com.

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Resource Library

10 Motor Performance Characteristics Every Industrial Maintenance Team Should Understand

  • August 2026
  • Number of views: 101
  • Article rating: No rating
Trade press article

This article provides practical rules of thumb for evaluating the performance and health of three-phase squirrel-cage induction motors in industrial environments. Rather than requiring detailed engineering calculations, these guidelines help maintenance professionals quickly identify operating conditions that may lead to reduced reliability, overheating, nuisance trips, or premature motor failures.

How to Compare NEMA, IEC Motors for Replacement

  • February 2026
  • Number of views: 77
  • Article rating: No rating
Trade press article — Control Engineering

This article explains the key considerations when replacing a failed motor with one built to a different standard. As IEC motors become more common in North America, maintenance professionals increasingly face situations where an IEC motor may need to be replaced with a NEMA motor, or vice versa. While this is often possible, the two standards contain important differences that must be evaluated carefully to avoid performance, reliability, and installation problems.

AC Motor Verification & Redesign with Motor Stats

  • March 2025
  • Number of views: 5856
  • Article rating: 5.0
FREE for Members of EASA
Webinar recording

This webinar goes through some data verification and redesign examples using the Motor Stats view within EASA’s AC Motor Verification & Redesign software to learn what it tells us and what it doesn’t tell us about our data.

IEC to NEMA Motor Ratings

  • February 2025
  • Number of views: 8041
  • Article rating: No rating
Article

The information in this article provides comparisons of key characteristics of IEC and NEMA motors to aid in evaluating the potential simplicity or complexity of the IEC to NEMA design conversion.

Clasificaciones IEC a NEMA

  • February 2025
  • Number of views: 5579
  • Article rating: No rating
Article

La información de este artículo proporciona comparaciones de las características clave de los motores IEC y NEMA para ayudar a evaluar la posible simplicidad o complejidad de la conversión de diseño IEC a NEMA.

Concentric to Lap Conversions

  • October 2023
  • Number of views: 13404
  • Article rating: No rating
Article

This article looks at some of the import details for a proper concentric to lap winding conversion. It also shows how using the EASA Technical Manual, EASA's AC Motor Verification & Redesign Software, as well as the EASA AC Redesign manual, can help.

Conversiones de un Bobinado Concéntrico a Imbricado

  • October 2023
  • Number of views: 7466
  • Article rating: 4.5
Article
Este artículo analiza algunos de los detalles de importación para una conversión adecuada de devanado concéntrico a devanado por vuelta. También muestra cómo puede ayudar el uso del Manual técnico de EASA, el software de rediseño y verificación de motores de CA de EASA, así como el manual de Rediseño de motores AC de EASA.

What’s New in Axial-Flux Machines?

  • April 2023
  • Number of views: 6501
  • Article rating: No rating
Article

Most EASA service centers encounter very few axial-flux machines. They are rare enough that it is worthwhile to describe what they are and how they differ from the typical radial-flux industrial motor or generator.

¿Qué Novedades Hay en las Máquinas de Flujo-Axial?

  • April 2023
  • Number of views: 5809
  • Article rating: No rating
Article

La mayoría de los centros de servicio de EASA encuentran muy pocas máquinas de flujo axial. Son tan raras, que vale la pena describir qué son y como se diferencian del típico motor o generador industrial de flujo radial.

Consider Winding Balance with Redesigns and Rewinds

  • December 2022
  • Number of views: 11348
  • Article rating: No rating
Article

Most AC stator windings installed by EASA service centers are balanced, three-phase, two-layer, lap windings. But, what does it mean for such a winding to be balanced?

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

LEARN MORE AND DOWNLOAD MÁS INFORMACIÓN Y DESCARGAR BUY PRINTED COPIES

READ MORE ABOUT THE FEATURES AND BENEFITS

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.

DOWNLOAD THE FULL RESULTS

ANSI/EASA AR100-2025

ANSI/EASA AR100-2025 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.

DOWNLOAD - ENGLISH

DESCARGAR - ESPAÑOL

EASA Technical Manual

EASA Technical Manual cover

Revised October 2025
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