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Articles in Industry Publications

Using EASA’s Motor Rewind Data – Version 4

  • June 2024
  • Number of views: 283
FREE for Members of EASA
Webinar recording

Learn how to effectively use EASA's live, ever-expanding online database of more than 250,000 windings.

Conversión de Aluminio a Cobre: Lo que Necesita Saber

  • December 2023
  • Number of views: 1677
FREE for Members of EASA
Webinar recording

¿Recibió un motor antiguo bobinado con alambre de aluminio? Este webinario explicará como realizar la conversión adecuada de alambre de aluminio a alambre de cobre en máquinas de CA y CC, incluyendo ejemplos para el rebobinado de estatores y campos shunt.

Interpoles and Compensating Windings in DC Machines – What Do They Do?

  • December 2023
  • Number of views: 2029
Article

Unlike their AC counterparts, DC machines do not have rotating magnetic fields. Rather, there are fixed magnetic field axes for the field (direct axis) and armature (quadrature axis). Even though the armature is rotating, the magnetic field axis in the armature is fixed thanks to commutation, which allows the direction of current in an armature conductor to change as it passes from the region under one main field pole to the next.

Interpolos y Devanados de Compensación - ¿Qué es lo que hacen?

  • December 2023
  • Number of views: 1303
Article

A diferencia de sus homólogos de CA, las máquinas de CC no tienen campos magnéticos rotativos. Más bien, existen ejes de campo magnético fijos para el campo (eje directo) y la armadura (eje en cuadratura). Aunque la armadura esté girando, el eje del campo magnético de la armadura está fijo gracias a la conmutación, lo que permite que la dirección de la corriente en un conductor de la armadura cambie a medida que pasa debajo de un polo de campo principal al siguiente.

Procedures for Refinishing Commutators and Slip Rings in Place

  • September 2023
  • Number of views: 1970
Article

General guidance for performing brush seating or comutator reprofiling in the field.

Procedimientos para rectificar in situ colectores y anillos rozantes

  • September 2023
  • Number of views: 1749
Article

Orientación general para realizar el ajuste del asiento de las escobillas o del conmutador en el campo.

Lead Wire Sizing 101

  • May 2023
  • Number of views: 6180
FREE for Members of EASA
Webinar recording

Choosing an appropriate lead wire for a new stator winding is an important task. The manufacturer’s information is not always available, or the number of circuits or external connection may have been changed, requiring a redesign of the lead wire.  

How to Measure Magnet Wire

  • March 2023
  • Number of views: 2659
Video

This video shows one step in collecting motor winding data: how to measure magnet wire.

How to Set Brush Neutral on a DC Machine

  • March 2023
  • Number of views: 3369
Video

This video shows how to adjust the brush neutral position of a DC machine to prevent sparking at the brushes at full load.

Improve Customer Satisfaction: Follow Electric Motor Storage Procedures

  • January 2023
  • Number of views: 2143
Article

One of the more mundane things we as repairers must be concerned with is motor storage. For many of us, storing large motors for major customers is its own profit center. For all of us, being aware of how our customers store the motors we repair and send to them is critical to customer satisfaction. A poorly stored motor is likely to suffer winding or bearing failure, and we don’t want unrealistic warranty claims over something outside our control.

Mejore la Satisfacción del Cliente: Siga los Procedimientos de Almacenamiento de Motores Eléctricos

  • January 2023
  • Number of views: 4966
Article

Una de las cosas más mundanas de las que debemos preocuparnos como reparadores es el almacenamiento de los motores y para muchos, almacenar motores grandes para clientes importantes representa ganancias. Para todos nosotros, ser conscientes de cómo nuestros clientes almacenan los motores que les reparamos es crítico desde el punto de vista de la satisfacción del cliente. Es probable que un motor mal almacenado sufra fallos en el devanado o en los rodamientos, y no queremos reclamos por garantía poco realistas sobre algo que está fuera de nuestro control.

llevando a Cabo Una Inspección Para Obtener Una Confiabilidad a Largo Plazo

  • November 2022
  • Number of views: 2143
Article

En el actual entorno competitivo cada vez mayor, los usuarios finales buscan centros de servicio de máquinas eléctricas rotativas que aumenten su oferta de valor agregado. Una de las formas más fáciles para que un centro de servicios logre esto es efectuando una inspección minuciosa y detallada de los equipos que reciben para reparación. Los resultados de dicha inspección permiten mejorar la confiabilidad de los equipos que se logra a través de los resultados de la evaluación y las recomendaciones que ofrece el centro de servicio para prevenir fallas recurrentes y mejorar el tiempo medio entre fallas.

Using Carbon Brush Face as an Effective Diagnostic Tool

  • October 2022
  • Number of views: 2599
Article

The worn carbon brush face indicates the operating conditions. Therefore, it can be utilized by brush experts as a highly effective diagnostic tool for troubleshooting and determination of root causes. If these warning signs shown at the brush face can be identified and proactively addressed in a timely manner, then major unexpected expensive catastrophic failures like flashover or repair of the contact surface can be avoided.

Usando las Caras de las Escobillas como Herramienta de Diagnóstico Efectiva

  • October 2022
  • Number of views: 2145
Article

EASA Technical Manual

  • September 2022
  • Number of views: 27473
FREE for Members of EASA
Book

Revised September 2022!
EASA's most comprehensive technical document is available FREE to EASA members. Download the complete manual or just the sections you're interested in.

Turn and Undercut of DC Commutators

  • August 2022
  • Number of views: 2860
FREE for Members of EASA
Webinar recording

This webinar discusses specific procedures to obtain the best possible results when machining & undercutting commutators for DC machines.

Tracción Magnética Desbalanceada en Motores Eléctricos Trifásicos

  • November 2021
  • Number of views: 5662
Article

Aunque la tracción magnética desbalanceada puede afectar a otras máquinas eléctricas rotativas, como los motores y generadores de CC y monofásicos, nuestro enfoque en este artículo se centrará en los motores jaula de ardilla trifásicos. Los dos temas principales son: La tracción magnética desequilibrada (UMP) y el descentrado del rotor (pullover).

Mitigating Risk with Insulation Systems

  • September 2021
  • Number of views: 12041
Article

Relevant standards including IEC 60085 and IEEE 1 have similar definitions for electrical insulating materials (EIM) and electrical insulation systems (EIS). As with any system, there is an interaction between the materials used, and the insulation system developers take great care to ensure that this interaction does not lead to undesirable outcomes.

Mitigando El Riesgo En Los Sistemas De Aislamiento

  • September 2021
  • Number of views: 11040
Article

Diferentes normas relevantes incluyendo la IEC 60085 y la IEEE 1 definen de forma similar los materiales electro aislantes (EIM) y los sistemas de aislamiento eléctrico (EIS). Como en cualquier sistema, existe una interacción entre los materiales usados y los diseñadores de los sistemas de aislamiento cuidan todos los detalles para evitar que esta interacción produzca resultados indeseados.

Electric Motors: Repair or Replace? Sales/Marketing PowerPoint Tool

  • August 2021
  • Number of views: 14996
PowerPoint files

This PowerPoint presentation is available for members to use to present the factors that should be considered when customers are faced with making the difficult decision to repair their existing motor or purchase a replacement.

DC Voltage Redesign

  • August 2021
  • Number of views: 8119
FREE for Members of EASA
Webinar recording

This webinar explains the DC redesign process along with the other factors often overlooked that should first be considered before a redesign.

Rewind 2021

Recordings and Handouts from the 2021 EASA Convention - Fort Worth, TX

  • June 2021
  • Number of views: 10688
Convention presentation

Revisit EASA's 2021 Convention & Solutions Expo by buying access to recordings of the general sessions and education events streamed from EASA's website! These recordings provide just over 22 hours of training. Downloadable PDFs of slides and technical papers are included!

BUY A COPY

Mechanical Reference Handbook

  • June 2021
  • Number of views: 6140
Handbook

This 94-page handbook (3.5" x 6", 9cm x 15cm) contains carefully selected materials designed to assist repair firms in their everyday work. Just as important, your customers and potential customers can use this pocket handbook as a handy reference for mechanical data for motors and driven equipment.

Factors to Consider When Testing DC Armatures

  • May 2021
  • Number of views: 13800
Article

There are a lot of factors to take into consider when interpreting the bar-bar test or surge test. This articles reviews those factors.

Factores a Considerar al Probar Armaduras de CC

  • May 2021
  • Number of views: 13100
Article
Hay muchos factores a tener en cuenta al interpretar la prueba de barra-barra o la prueba de sobretensión. Este artículo revisa esos factores.

Opportunities in the Diesel Locomotive Repair Industry

  • March 2021
  • Number of views: 4906
Article

As EASA members, we have the technical skills, knowledge and support to do almost anything in the electromechanical repair industry. Rail work is no different.

US Department of Energy Issues Final Rule for Testing Small Electric Motors

  • February 2021
  • Number of views: 9528
Article

The US Department of Energy (DOE) has issued rulemaking on test procedures for small electric motors for more than a decade. The present “final rule,” effective February 3, 2021, is the culmination of those efforts.

DC Machine Data Sheet

  • December 2020
  • Number of views: 12953
Form/Worksheet

EASA's DC Machine Data Sheet provides all the fields necessary on a simple one-page form to accurately record all the details about the machine being repaired.

Working with the No Nameplate Motor

  • November 2020
  • Number of views: 6972
Article

Customers sometimes send in a motor with no nameplate, or an illegible nameplate, having little knowledge of the machine’s ratings. This article will explore the process of evaluating the machine using frame size, winding data and test data to assign reasonable ratings.

Advice: Effects of High or Low Voltage on Motor Performance

  • September 2020
  • Number of views: 12203
Trade press article — RV News

To ensure the reliability of an RV’s electrical devices, especially electric motors, campers must know the service voltage of the hookup their RV is using. Teaching consumers to check that before they plug in the vehicle could save them many headaches.