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Controlling Stator Copper Losses in Formed Coil Rewinds

  • May 2020
  • Number of views: 4414
  • Article rating: No rating
FREE for Members of EASA
Webinar recording

This webinar recording looks at several aspects of winding design to prevent increased temperature rise and decreased efficiency.

Taking data: How to correctly identify the connection

  • February 2014
  • Number of views: 1390
  • Article rating: No rating

When taking winding data, the area most prone to error is in identifying the connection. This article includes a reference page that winders are encouraged to print and laminate for future use.

Taking winding connection data on alternators

  • May 2010
  • Number of views: 846
  • Article rating: No rating

We begin this article by clarifying the terms "alternator" and "generator." Both terms refer to a machine that converts mechanical to electrical power. An alternator is a synchronous machine that converts mechanical to AC electrical power. A generator is a more general term and is a machine that converts mechanical to electrical power, either AC or DC. An alternator is always a generator, but not vice-versa. Our focus in this article will be on 3-phase alternators. However, much of the information provided also applies to single-phase alternators and single- or three-phase generators. Key steps are:

  • Identifying the leads
  • Determining lead wire size
  • Determining the internal connections
  • Current density
  • Winding changes
  • Voltage changes

Training Film 14: Taking Data From a Hand-Wound DC Armature

  • June 1984
  • Number of views: 1289
  • Article rating: No rating

Describes the correct procedure for taking data from hand-wound DC armatures. Shows how to record the data on typical DC data sheets, and explains the terminology used describing DC data. Points out differences between lap and wave windings.

Training Film 1: Taking Winding Data From a Three-Phase Induction Motor

  • June 1984
  • Number of views: 808
  • Article rating: No rating

Teaches how to determine type of connection, number of parallel circuits, turns per coil, wire size, span and groups. Shows step-by-step way to properly record all information.

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 May 2021
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.