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Considerations for surface masking and winding treatment processes

  • March 2018
  • Number of views: 53
  • Article rating: No rating
Article

One of the least popular tasks to perform related to winding treatment processes is preparation and cleanup of fits, threaded holes and machined surfaces. Many service centers invest additional time in the preparation stage so as to minimize the cleanup stage. The most common approach to protecting these surfaces during winding treatment is to utilize masking compounds or dry release sprays.

In the last year, EASA’s technical support staff has received a number of inquiries from members seeking replacement recommendations for Famous Lubricants' “Special Masking Compound” which is currently unavailable. It is believed at this time that the manufacturer intends on continuing production at some point in the future though the time frame is not known. This specific problem leads to a more general question: What is a good practice for choosing a product to mask these surfaces?

Consideraciones para enmascarar superficies y procesos de tratamiento de bobinados

  • March 2018
  • Number of views: 47
  • Article rating: No rating
Article

Una de las actividades a realizar menos populares relacionadas con el tratamiento de los bobinados, es la preparación y la limpieza de los ajustes, agujeros roscados y superficies mecanizadas. Muchos centros de servicio invierten tiempo adicional durante la etapa de preparación para minimizar la etapa de limpieza. El enfoque más común para proteger estas superficies durante el tratamiento del bobinado consiste en utilizar compuestos para enmascarar o aerosoles de liberación de película seca. Durante el último año, el departamento de soporte técnico de EASA ha recibido una serie de consultas por parte de los miembros buscando recomendaciones para reemplazar el producto “Special Masking Compound” de Famous Lubricants’ (ver Figura 1) que actualmente no se encuentra disponible. Se cree en estos momentos que el fabricante tiene la intención de continuar con la producción en el futuro, aunque el plazo se desconoce. Este problema específico conlleva a una pregunta más general: ¿Cuál es una buena práctica para escoger un producto para enmascarar estas superficies?

Induction Motor Rotor Windings: Squirrel-Cage and Wound Rotor Basics for the Technician

  • January 2018
  • Number of views: 54
  • Article rating: No rating
Webinar recording

This webinar covers the following topics:

  • Induction motor basics for operation Squirrel-cage:
    • Conductor material Deep-bar effect Multiple-cage windings
    • Phase resistance IEC/NEMA design letters
    • Speed-torque characteristics
  • Wound-rotor:
    • Winding construction
    • Wave-wound connections
    • Distribution factor and chord factor
    • Rotor phase voltage Speed-torque characteristics

Getting the most from power factor tip-up testing

  • April 2017
  • Number of views: 149
  • Article rating: 1.0
Article

The power factor tip-up test is commonly used as a quality measurement for new coils and windings manufactured for AC motors and generators rated 6 kV and higher. It can also be useful in the rewind shop to verify the quality of a newly-installed coil system including the effectiveness of VPI processing.

Aprovechando al máximo la prueba de factor de potencia tip-up

  • April 2017
  • Number of views: 130
  • Article rating: 5.0
Article

 

La prueba de volcado del factor de potencia se usa comúnmente como una medida de calidad para bobinas y devanados nuevos fabricados para motores de CA y generadores con clasificación de 6 kV y más. También puede ser útil en el taller de rebobinado para verificar la calidad de un sistema de bobina recién instalado, incluida la efectividad del procesamiento de VPI.

How To Wind Three-Phase Stators (Version 2)

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

  • February 2017
  • Number of views: 66
  • Article rating: No rating
Software

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. 

Bobinage d'un stator triphasé

  • September 2016
  • Number of views: 37
  • Article rating: No rating
Software

Cette formation en ligne a été développée par EASA et a été traduite en français avec la collaboration de EASA, Chapitre Québec et les Maritimes et d’Élexpertise. Cette formation a été réalisée avec l’aide financière de la Commission des partenaires du marché du travail. L’objectif principal est de permettre à l’apprenant d’inscrire les données sur une fiche technique en faisant référence aux notions de base d’un stator triphasé. Les activités d’apprentissage touchent les principales étapes du bobinage. L’apprenant apprend l’entretien et la réparation d’un stator triphasé selon les normes en vigueur. Remarque: Cette formation sera accessible en ligne pour une période de 6 mois. Prix membre: $199 US Prix membre non: $599 US CONTENU                                                                                           INTRODUCTION MODULE 1- Notions de base sur le stator triphasé Structure du stator triphasé Schémas de raccordement du bobinage de stator Utilisation des fiches techniques MODULE 2 - Entretien et réparation d'un stator triphasé Mesures de sécurité Décapage du bobinage d’un stator triphasé Démoulage du bobinage d’un stator triphasé Préparation du noyau d’un stator triphasé Fabrication des enroulements d’un stator triphasé Insertion des enroulements dans un stator triphasé Raccordement des enroulements et des conducteurs électriques Laçage et renforcement du bobinage d’un stator triphasé Inspection du bobinage avant finition Test du bobinage d’un stator triphasé Finition du bobinage de stator triphasé CONCLUSION DURÉE: 10 heures

The Basics: Taking Motor Data

  • September 2016
  • Number of views: 35
  • Article rating: No rating
Webinar recording

This webinar covers:

  • Photo documentation
  • Paper documentation
  • Measurements
  • Winding data: turns, wire size, connection, core dimensions
  • Keeping cause of failure questions in mind 

The Basics: AC Motor Design

  • July 2016
  • Number of views: 43
  • Article rating: No rating
Webinar recording

This webinar recording covers: 

  • Various types of AC motors and bases for operation
  • Squirrel cage induction motor rotor design / construction
  • Squirrel cage induction motor stator design / construction

Rewinding Tips for Premium-Efficient Motors

  • June 2016
  • Number of views: 44
  • Article rating: No rating
Webinar recording

This webinar recording covers: 

  • Importance of core loss testing
  • Methods to reduce core losses
  • Slot fill improvement without reducing copper

Getting The Most From Your Electric Motors

Getting The Most From Your Electric Motors - coverThis 40-page booklet provides a great marketing tool for your service center! Use it to provide end users with information that will help them obtain 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

READ MORE ABOUT THE FEATURES AND BENEFITS

EASA Technical Manual

EASA Technical Manual cover

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

ANSI/EASA AR100-2015

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 AR200

EASA AR200: Guide for the Repair of Power and Distribution Transformers cover

Guide for the Repair of Power and Distribution Transformers
This document establishes guidelines for each step of the repair of power transformers, describing record keeping, tests, analysis, and general guidelines for the repair of power transformers.

LEARN MORE