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Questions?

For information about ANSI/EASA AR100 or questions about the work on this standard, contact:

Mike Howell, PE
EASA Technical Support Specialist
+1 314 993 2220
mhowell@easa.com

ANSI Accredited Standards Developer Information

The Importance of Core Loss Testing

  • August 2026
  • Number of views: 622
  • Article rating: No rating

Both the core loss and hot spot temperature MUST be considered when evaluating a core prior to rewind.

ANSI/EASA Standard AR100-2025: Recommended Practice for the Repair of Rotating Electrical Apparatus

  • January 2026
  • Number of views: 16791
  • Article rating: 3.3

ANSI/EASA AR100 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.

Norma EASA AR100-2025: Práctica Recomendada para la Reparación de Máquinas Eléctricas Rotativas

  • January 2026
  • Number of views: 4444
  • Article rating: 4.0

La norma ANSI/EASA AR100 es una guía indispensable para la reparación de máquinas eléctricas rotativas. Su objetivo es establecer las prácticas recomendadas en cada etapa de los procesos de rebobinado y reconstrucción de aparatos eléctricos rotativos.

Core Repair Tips To Reduce Core Loss

  • August 2024
  • Number of views: 7306
  • Article rating: 3.5
FREE for Members of EASA

When a core loss test reveals localized hot spots, or visual inspection identifies physical damage, the ability to repair the damage in a cost-effective manner means the difference between repair or replacement.

Crooked Teeth? We’ve Got Braces!

How Using Clamps When Pulling Magnet Wire Helps Prevent Splayed Teeth

  • January 2024
  • Number of views: 4820
  • Article rating: No rating

Unless great care is taken, pulling magnet wire from a motor stator often bends or splays the lamination’s end teeth. Bent teeth, or teeth that have been splayed outward at the ends of the core stack, will likely compromise the quality of the repair job. Therefore, we have designed and implemented the use of disc clamps to hold the stator tooth tips in place while pulling magnet wire from the slots. The clamping fixtures described in the photos have helped ensure that we avoid damaging the stator teeth during the stripping process.

¿Dientes Torcidos? ¡Tenemos Ortodoncia!

Cómo el usar discos de retención al tirar del alambre magneto previene doblar los dientes de las laminaciones

  • January 2024
  • Number of views: 4238
  • Article rating: No rating

A no ser que se tenga mucho cuidado, tirar del alambre magneto al desmantelar el estator de un motor a menudo deforma o dobla los dientes de las laminaciones. Estos dientes deformados comprometerán la calidad de la reparación y hay estudios que demuestran que este problema puede reducir la eficiencia del motor. Sin embargo, aunque esta reducción puede ser pequeña, genera altos costos y desperdicio de energía.

Taking Proper Measurements for Re-stacking Stator Cores Featuring Vents

  • May 2023
  • Number of views: 6023
  • Article rating: No rating

There are many factors to consider when re-stacking a stator. Those include the materials, core compression, length of the core, vents, spacers, vent construction and more. This article focuses on taking proper measurements when re-stacking a stator core and how to go about stacking the stator to ensure those dimensions are met.

Tomando las Medidas Adecuadas para Re apilar Núcleos de Estatores con Orificios de Ventilación

  • May 2023
  • Number of views: 6568
  • Article rating: No rating

Hay muchos factores que se deben considerar al re apilar el núcleo del estator. Estos incluyen los materiales, la compresión y largo del núcleo, los orificios de ventilación, los espaciadores, la construcción de los orificios de ventilación y más. Este artículo se centra en tomar las medidas adecuadas para volver a apilar el núcleo de un estator y cómo garantizar que se cumpla con esas dimensiones.

Working with Segmented Stator Cores

  • February 2022
  • Number of views: 15373
  • Article rating: 2.5

Induction motor stator cores can be manufactured using single-piece laminations, however, for larger stators, or when minimizing scrap material, the stator laminations are segmented. While most service center repairs of machines with segmented stator laminations require no special attention, this article reviews a few scenarios that are important to be mindful of.

Trabajando con Estatores con Núcleos Segmentados

  • February 2022
  • Number of views: 9428
  • Article rating: 3.0
Los núcleos de los motores de inducción se pueden fabricar con laminaciones de una sola pieza, sin embargo, para estatores muy grandes o cuando se minimiza el material de desecho, las laminaciones del estator son segmentadas.  Aunque la mayoría de las reparaciones en el centro de servicio de  las máquinas con estatores con laminaciones segmentadas no requieren atención especial, este artículo analiza algunos escenarios que es importante tener en cuenta.

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.

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EASA Good Practice Guide

Good Practice Guide to Maintain Motor Efficiency
Based on the 2019 and 2003 Rewind Studies of premium efficiency, energy efficient, IE2 (formerly EF1) and IE3 motors

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