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Axial Thrust in Rotodynamic (Centrifugal) Pumps

  • February 2024
  • Number of views: 706
  • Article rating: No rating
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When repairing centrifugal and axial flow pumps, axial thrust is a concern. An understanding of the causes and the mitigating provisions of various pump designs will help repair technicians to ensure those provisions work properly.

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

  • December 2023
  • Number of views: 1309
  • Article rating: 5.0
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: 953
  • Article rating: No rating
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.

Concentric to Lap Conversions

  • October 2023
  • Number of views: 3209
  • 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: 1074
  • Article rating: 5.0
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.

EASA Winding Database and Verification and Redesign Program: An Easy-to-Use Solution When Faced with Bare Core Winding Challenges

  • July 2023
  • Number of views: 1670
  • Article rating: No rating
Article

Occasions arise where original winding data is not available. It may have been recorded incorrectly or a different service center may have stripped the core but not completed the repair. In those cases, the service center must come up with a new “bare core” winding design. EASA's redesign software has some specific features to address this need.

What’s New in Axial-Flux Machines?

  • April 2023
  • Number of views: 2635
  • 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: 2405
  • 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.

Considere el balanceo del devanado en sus rediseños y rebobinados

  • December 2022
  • Number of views: 1350
  • Article rating: No rating
Article

La mayoría de los bobinados de los estatores de CA instalados por los centros de servicio de EASA son imbricados de doble capa, trifásicos y están balanceados. Pero ¿qué significa que estén balanceados?

Consider Winding Balance with Redesigns and Rewinds

  • December 2022
  • Number of views: 5339
  • 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 AR100-2020

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.

DOWNLOAD - ENGLISH

DESCARGAR - ESPAÑOL

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.

VIEW & DOWNLOAD