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Taking Proper Measurements for Re-stacking Stator Cores Featuring Vents

  • May 2023
  • Number of views: 618
  • 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: 599
  • 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: 6290
  • Article rating: 3.0

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: 5067
  • 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.

How to Test and Assess Stator Core Condition Using a Loop Test

  • April 2020
  • Number of views: 13699
  • Article rating: 4.4
FREE for Members of EASA
Webinar recording

Is the motor drawing high no-load amps and winding data are correct? Are you experiencing unusual heating of the stator under load? Those common questions can be answered by checking the stator core condition.

Cómo Probar y Evaluar la Condición del Núcleo de un Estator con la Prueba de Lazo (“Toroide” o Loop Test)

En Español

  • April 2020
  • Number of views: 11700
  • Article rating: 4.0
FREE for Members of EASA
Webinar recording

¿El motor consume mucha corriente en vacío, aunque los datos del bobinado son correctos? ¿El motor se calienta con carga de forma inusual? Estas son preguntas comunes que pueden ser resueltas verificando la condición del núcleo del estator. En este webinario discutiremos cómo realizar la prueba de lazo en el núcleo de un estator y cómo analizar los resultados obtenidos, proporcionando información sobre los equipos utilizados, consejos para reparar el núcleo del estator y otras pruebas alternativas.

What watts, what pounds? Working with stator core test results

  • November 2019
  • Number of views: 7644
  • Article rating: 3.3

The two primary reasons for performing stator core testing in the service center are (1) to verify that the stator core is acceptable for continued use and in the event of a rewind, and (2) to verify that the repair process has not adversely changed the stator core condition. The purpose of this article is to discuss how we determine, assess and compare stator core test results. It is extremely important to understand that variance in test procedures may invalidate comparison.

¿Cuántos vatios, cuántas libras? Trabajando con los resultados de la prueba de núcleo del estator

  • November 2019
  • Number of views: 6167
  • Article rating: 5.0

Las dos razones principales para realizar la prueba de núcleo del estator en el centro de servicios son (1) verificar que el núcleo del estator es apto para uso continuo y en caso de rebobinado y (2) verificar que el proceso de rebobinado no ha alterado de forma adversa la condición del núcleo del estator. El propósito de este artículo es discutir como determinar, evaluar y comparar los resultados de la prueba de núcleo. Es muy importante comprender que la variación de los procedimientos de prueba puede invalidar la comparación.

Stator Core Test Form

  • September 2019
  • Number of views: 9875
  • Article rating: 3.0

EASA’s Stator Core Test Form provides a step-by-step procedure for calculating the number of turns and cable size required for a loop test.

How To Wind Three-Phase Stators (Version 2)

Self-paced, interactive training for stators 600 volts or less

  • February 2017
  • Number of views: 14032
  • Article rating: 4.5

This EASA software is a valuable interactive training tool ideal for training your novice(s) ... and even experienced winders will learn from it. The CD teaches how to wind in a richly detailed, step-by-step approach which includes narrative, animations and video clips, with tests to assess student comprehension. 

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

Revised September 2022
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.