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Working with odd-turn (unequal-turn) windings

  • July 2018
  • Number of views: 84
  • Article rating: No rating
Article

Manufacturers almost always utilize machine-inserted concentric windings for random-wound, three-phase stators when their processes can facilitate it due to lower manufacturing costs. Many service centers can produce concentric windings too, but the most common practice is to utilize the two-layer lap winding. For form-wound stators, the two-layer lap winding is almost always used by manufacturers and service centers alike. The purpose of this article is to provide some tips for working with odd-turn (unequal-turn) windings, or two-layer windings where the total number of turns per slot is an odd number (e.g., 3,5,7,9…n). In such cases, the top and bottom coil sides must have a different number of turns.

Trabajando con bobinados con espiras diferentes (impares)

  • July 2018
  • Number of views: 36
  • Article rating: No rating
Article

Cuando sus procesos pueden facilitarlo y para rebajar costos de fabricación, los fabricantes casi siempre emplean en los estatores trifásicos de alambre redondo, bobinados concéntricos insertados con máquinas. Muchos centros de servicio también pueden rebobinar bobinados concéntricos, pero la práctica más común es la de utilizar bobinados excéntricos de doble capa. Para los estatores con bobinas pre-formadas, los fabricantes y los centros de servicio utilizan la mayoría de las veces, bobinados excéntricos de doble capa.

La finalidad de este artículo es proporcionar algunos consejos para trabajar con bobinados con espiras diferentes (impares) o con bobinados excéntricos de doble capa donde el número de espiras por ranura es un número impar (Ej. 3,5,7,9…n). En estos casos, los lados superior e inferior de la bobina deben tener un número de espiras diferente.

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

Common recommendations for stored motors

  • September 2013
  • Number of views: 44
  • Article rating: No rating
Article

When an electric motor is expected to be stored for an appreciable time before it is placed into service, certain steps should be taken to ensure that it will be suitable for operation when it is needed. The practical limitation we need to recognize is that much of what we do when putting a motor into long-term storage has to be undone when the same motor is moved into operation. This article addresses common recommendations for stored motors.

Rewind tips for 2300-volt, random-wound motors

  • October 2001
  • Number of views: 30
  • Article rating: No rating
Article

When rewinding a motor, the service center is restricted by the original design. Sometimes, we encounter a motor design we wish had never been developed. Many winders would agree that the random-wound, 2300-volt motor design falls into that category. From the manufacturer's perspective, a random-wound, 2300-volt motor represents a substantial reduction in manufacturing cost. The great challenge to the service center is in successfully rewinding this design while maintaining profit.

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