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Inverter Duty Three-Phase Motor Windings

  • June 2024
  • Number of views: 2132
  • Article rating: 1.0
Article

With the advent of solid-state electronic variable frequency drives (VFDs) in the late 1980s, it was found that the windings of motors used on VFDs failed more frequently than when powered by a utility (sine wave) supply. By the turn of the century, motor manufacturers had gained a better understanding of how VFDs affected motor windings. This article describes the materials and methods associated with inverter duty windings.

Devanados para motores trifásicos Inverter Duty

  • June 2024
  • Number of views: 1471
  • Article rating: No rating
Article

Con la llegada de los variadores de frecuencia electrónicos (VFD) de estado sólido a fines de la década de 1980, se descubrió que los bobinados de los motores que funcionaban con VFDs fallaban con más frecuencia que al estar alimentados con la energía convencional (onda sinusoidal). A principios de siglo, los fabricantes de motores habían comprendido mejor cómo los VFD afectaban los devanados del motor, y al igual que los proveedores de materiales electro, aislantes habían desarrollado materiales y métodos para mejorar la confiabilidad de los devanados de los motores alimentados con VFDs. En este artículo, describiremos los materiales y métodos asociados con los devanados inverter duty.

Common VFD and Motor Driven System Misapplications

  • July 2023
  • Number of views: 3498
  • Article rating: No rating
FREE for Members of EASA
Webinar recording

Variable frequency drives (VFDs) are more common than ever before.  Sometimes when a VFD is introduced into a motor driven system, system reliability suffers. This recording addresses some of the common factors that reduce motor driven system reliability and how to correct them.   

Rewind 2022

Recordings and Handouts from the 2022 EASA Convention - St. Louis, MO

  • July 2022
  • Number of views: 3013
  • Article rating: No rating
Convention presentation

Revisit EASA's 2022 Convention & Solutions Expo by buying access to recordings of the general sessions and education events streamed from EASA's website! These recordings provide almost 44 hours of training. Downloadable PDFs of slides and technical papers are included!

Consider Rated Voltage and Frequency When Testing

  • July 2022
  • Number of views: 4016
  • Article rating: No rating
Article

When possible, it is good practice to perform an uncoupled, no-load run on an induction motor as an incoming diagnostic test. A no-load run should also be performed after assembly, and ANSI/EASA AR100-2020 states that “no-load running tests should be made at rated voltage and rated frequency.” In this article, we’ll discuss some of the reasons why this is important and some things to consider when you cannot meet both requirements.

Cuando Haga Pruebas Considere la Tensión y Frecuencia Nominales

  • July 2022
  • Number of views: 4364
  • Article rating: No rating
Article

Como forma de diagnóstico y cuando sea posible, una buena práctica consiste en probar en vacío un motor de inducción que entra al centro de servicios. Esta misma prueba también se debe efectuar después del ensamblaje y la norma ANSI/ EASA AR100-2020 establece que "las pruebas en vacío se deben realizar a la tensión y frecuencia nominales". En este artículo, discutiremos algunas de las razones por las que esto es importante y algunos factores a considerar cuando no se puede cumplir con ambos requisitos.

Managing Voltage Stress for VFD Applications on IEC Motors

  • June 2022
  • Number of views: 4607
  • Article rating: 4.3
Article

In today’s global economy, it is quite possible to get electric motors from all over the world. Most electric motors that are 500 hp (373 kW) or less will conform to one of two basic manufacturing standards; NEMA or IEC. The intent of this article is to focus on IEC standards for managing voltage stress in VFD applications as it pertains to the motor’s windings.

Manejando los Esfuerzos de Voltaje en Aplicaciones VFD con Motores IEC

  • June 2022
  • Number of views: 4627
  • Article rating: No rating
Article

En la economía global actual, es posible adquirir motores eléctricos fabricados en todo el mundo. La mayoría de los motores eléctricos de 500 HP (373 kW) o menos se ajustarán a una de las dos normas básicas de fabricación; NEMA o IEC. La intención de este artículo es centrarse en las normas IEC para gestionar la sobre tensión en aplicaciones con VFD en lo que respecta a los devanados del motor.

Accessorizing Your VFD for Proper Operation and Power Quality

  • July 2021
  • Number of views: 8364
  • Article rating: No rating
FREE for Members of EASA
Webinar recording

This webinar goes through the basics of what accessories may be needed for proper VFD control and power quality add-ons to improve motor driven system reliability.

Inverter Duty Motor Rewinding

  • April 2021
  • Number of views: 14062
  • Article rating: 1.7
FREE for Members of EASA
Webinar recording

This webinar recording reviews the failures associated with 3-phase motors on Variable Frequency Drives (VFDs) and how to rewind to limit future failures.

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 May 2024
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