Facebook Twitter LinkedIn YouTube Menu Search Arrow Right Arrow Left Arrow Down Arrow Up Home Arrow Next Arrow Previous RSS Icon Calendar Icon Warning Icon
EASA HIRING TECHNICAL SUPPORT SPECIALIST  LEARN MORE

Update now available for EASA Technical Manual

EASA Technical ManualAn update to EASA's most comprehensive technical resource is now available for FREE to association members. Reviewed by EASA's Technical Services Committee and revised by staff, important update been made to: 

  • Section 8: Bearings

DOWNLOAD FOR FREEBUY A PRINTED COPY

NOT A MEMBER? JOIN US!

Looking For A Challenging Career With Opportunities for Growth?

The electro-mechancial repair industry offers exciting and varied job opportunities for employees that want to be part of an industry that's essential to everyday life. Watch the video to learn about the opportunities available to you.

FIND SERVICE CENTERS NEAR YOU 

Looking for Employees?
If you're an EASA member, use this video and other resources to promote your business to potential employees.

LEARN MORE

Call for Presentations

Call for PresentationsWould you like to present at EASA 2024? Do you have a non-commercial presentation that would be of interest to electromechanical technicians, managers or business owners? Submit your suggestion and abstract for consideration.

Deadline: November 1, 2023

SUBMIT YOUR ABSTRACT

Nominate Someone For The EASA Award

EASA AwardDo you know any exceptional industry individuals? If so, nominate them for the Exceptional Achievement Service Award.

The Exceptional Achievement Service Award recognizes individuals who have provided exceptional service to the electrical apparatus sales and service industry. The award is presented at the Association convention.

Deadline: January 1, 2024

LEARN MORE & SEE PAST RECIPIENTS

SUBMIT A NOMINATION

EASA Releases Findings From Latest Industry Research

2023 EASA Industry Research

During the 2023 EASA Convention & Solutions Expo, Jerry Peerbolte, Professor Emeritus at the University of Arkansas, presented findings from the fifth EASA research study conducted of end-user customers. EASA partnered with Plant Services magazine to conduct the study of their readers (and your customers).

WATCH & DOWNLOAD THE RESEARCH

Sean McNamara, EASA Chairman of the Board

Tech Tip: Exciter Winding Tips for Synchronous Machines

One of the most common errors we see when rewinding synchronous alternators is specific to the exciter rotor. It’s common for a winder to assume the “poles” match the main rotor when in fact that is rarely the case. The exciter rotor MUST be wound for the same number of poles as the stationary exciter fields.

The output frequency of the exciter can be determined by: Exciter poles / main rotor poles x line frequency

Examples:

  • Main rotor has 4 poles
    Exciter fields have 10 poles  10/4 x 60 (50) = 150 Hz (125 Hz)
  • Main rotor has 6 poles
    ​​​​​​​Exciter fields have 10 poles  10/ 6 x 60 (50) = 100 Hz (83 Hz)

There are two reasons for an exciter to be wound with more poles than the main stator and rotor of an alternator. First, the higher output frequency results in a cleaner DC waveform when rectified. Second, a higher frequency allows a greater power rating in a smaller core.

Upcoming Events

No content

A problem occurred while loading content.

VIEW ALL EASA TRAINING EVENTS
VIEW ALL CHAPTER EVENTS
INDUSTRY-RELATED CONFERENCES
Upcoming Webinars

No content

A problem occurred while loading content.

New Resources
EASA RESOURCE LIBRARY