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
Know someone that's had an impact on our industry? Nominate them for the EASA Award. SUBMIT NOMINATION

Filter the results

  • Enter one or more words to find resources containing any of the words entered
  • Enter words or phrases between " " to find exact match

Resource categories

Resource Library

Principios de Motores C.A. Medianos y Grandes

  • February 2019
  • Number of views: 82
  • Article rating: No rating
Book

Las versiones impresas, en CD-ROM y en forma de descarga del valioso manual didáctico / recurso de EASA, “Principios de Motores C.A. Medianos y Grandes”, se  ahora disponibles en inglés y en español. El manual incluye gráficos e ilustraciones, fotografías y mucha información técnica sobre máquinas C.A., incluyendo como funcionan, información específica sobre los tipos de encerramientos, fabricación de componentes y aplicaciones.  Muchos de los principios incluidos en el libro aplican a todos los motores C.A., especialmente a aquellos accesorios que fueron asociados en el pasado con las máquinas más grandes (como encoders, RTDs, termostatos, calentadores de espacio, sensores de vibración, etc.).

European Commission announces motor and power converter efficiency directive regulation

  • December 2018
  • Number of views: 58
  • Article rating: No rating
Article

On October 22, 2018, the European Commission submitted its plan to expand motor and power converter efficiency regulations. As part of the EcoDesign directive, the Commission has been working on expanded motor and drive regulations for several years. The European Union directive will address both motors and variable frequency drives (VFDs) from .75 to 1,000 kW (1 to 1340 hp).

Considerations for using VFDs with standard motors

  • December 2016
  • Number of views: 94
  • Article rating: No rating
Trade press article Plant Engineering

There are a few areas of concern involving the misapplication variable frequency drives (VFDs) on a standard induction motor. This article looks at some of those.

How to properly operate a three-phase motor using single-phase power

  • October 2016
  • Number of views: 140
  • Article rating: No rating
Trade press article Plant Engineering

There are several methods to operating a three-phase motor using single-phase power to make what would be an otherwise expensive and arduous process a little easier.

EASA Technical Manual

  • August 2016
  • Number of views: 55
  • Article rating: No rating
Book

EASA's most comprehensive technical document is available FREE to EASA members. Download the complete manual or just the sections you're interested in.

Operating a three-phase motor using single-phase power

  • August 2016
  • Number of views: 54
  • Article rating: No rating
Article

We all have that occasional customer who got a “deal” at an auction: a compressor, or lathe, or wood-working equipment, only to discover when he started to install it that this equipment has a three-phase motor and only single-phase power is available. You know that you are about to be called upon to “convert” that piece of equipment, and you probably realize that it’s going to cost you more than you can charge.

Funcionamiento de un motor trifásico con energía monofásica

  • August 2016
  • Number of views: 58
  • Article rating: No rating
Article

Todos nosotros tenemos ese cliente ocasional que compró “una ganga” en una subasta, como un compresor, un torno o una máquina para trabajar madera y que solo descubre al comenzar a instalarlo que ese equipo tenía un motor trifásico y que él dispone únicamente de energía monofásica. Posiblemente sea su vecino o un amigo de la iglesia. En cualquier caso, usted está a punto de ser contactado para “convertir” esa parte del equipo y probablemente piensa que eso le va a costar más de lo que el puede gastar. Soluciones utilizadas anteriormente incluyen​: Conectando dos fases a los 220 voltios de la entrada monofásica y condensadores a una de las líneas energizadas para crear “una línea fantasma” para el tercer cable. Utilizar un convertidor de fase rotativo. Descargar el artículo siguiente para los detalles.

Selection and use of a VFD for service center testing

  • January 2016
  • Number of views: 56
  • Article rating: No rating
Article

With the growing popularity of variable frequency drives (VFDs), it is likely almost every EASA service center has repaired motors powered by one in a customer’s installation. For these motors, it is best that after repair they are tested using a VFD, typically at no-load. This will provide operation mimicking the actual customer application, at varying speeds, and will help ensure proper mechanical operation throughout the speed range. This will include detecting vibration problems, identifying any resonant speeds within the operating range, and more. Also, if the motor is used above utility line frequency (i.e., 50 Hz or 60 Hz), it should be operated up to top speed for vibration measurement and a good break-in of the bearings.

Topics covered include:

  • Selection challenges
  • Voltage, power rating and frequency
  • New or used VFDs for testing?
  • Operating parameters

Selección y uso de un Variador de Frecuencia Electrónico para hacer pruebas en un centro de servicios

  • January 2016
  • Number of views: 47
  • Article rating: No rating
Article

Con el aumento de la popularidad de los variadores de frecuencia electrónicos (VFDs o drives), es probable que casi todos los centros de servicio miembros de EASA hayan reparado algún motor que funcione con un variador de frecuencia en las instalaciones de un cliente. Lo más conveniente después de reparar estos motores es probarlos, generalmente en vacio, utilizando un drive. Esto nos permite simular la aplicación real del cliente variando la velocidad así como también tener la certeza que el motor funciona bien mecánicamente dentro de un rango de velocidades. Esto incluye descubrir problemas de vibraciones, identificar alguna velocidad de resonancia dentro del rango de operación y otros problemas. Además, si el motor está trabajando por arriba de la frecuencia de red (ej. 50 ó 60 Hz), deberá funcionar hasta alcanzar su velocidad máxima para comprobar sus niveles de vibración y que los rodamientos puedan expulsar el exceso de lubricación y se asienten por sí mismos en su posición de trabajo (break-in). Los temas cubiertos incluyen: Desafíos de selección Tensión, potencia y frecuencia VFD nuevos o usados para las pruebas? Parámetros de operación

Partial discharge data collection on VFD motors

  • December 2015
  • Number of views: 64
  • Article rating: No rating
Article

This article describes the technical issues in online partial discharge (PD) detection on motors fed by VS-PWM drives, and gives an example of one system that detected the PD successfully.

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