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Webinar Recordings

Three-phase Motor “Rules of Thumb”

  • October 2025
  • Number of views: 1016
Article

Often when we are dealing with three-phase squirrel cage motors we ask ourselves “Is there a standard or a rule of thumb for this motor characteristic?” The 10 characteristics that follow apply to conditions associated with motor starting as well as steady state operation. Examples are provided for each of the characteristics.

Motores trifásicos:“Reglas Generales”

  • October 2025
  • Number of views: 323
Article

A menudo, cuando trabajamos con motores trifásicos jaula de ardilla, nos preguntamos: "¿Existe una norma o regla general para esta característica del motor?". Las siguientes 10 características aplican tanto al arranque del motor como al funcionamiento en estado estacionario.

Vertical Motor End Play

  • August 2025
  • Number of views: 1610
Webinar recording

This recording provides an overview of common different thrust bearing arrangements, with end play guidance tips for each.

Rewind Tips for Two-speed, Two-Winding Hoist Motors

  • August 2025
  • Number of views: 1331
Article

Concentric to lap winding conversions are common practice in many EASA service centers. For most stators, this change is feasible and can be made with little difficulty. In some cases, however, it can be quite challenging and result in undesired outcomes due to reduction in copper or insulation.

Consejos para Rebobinar Motores de Grúas de Dos Velocidades con Dos Devanados

  • August 2025
  • Number of views: 773
Article

Las conversiones de devanados concéntricos a imbricados son una práctica común en muchos centros de servicio de EASA y en la mayoría de los estatores, este cambio es factible y se puede realizar sin dificultad. Sin embargo, en algunos casos, puede resultar muy complicado y generar resultados no deseados debido a la reducción del cobre o la pared de aislamiento.

Performing a Single-Phase Rotor Test on an Assembled Three-Phase Induction Motor

  • May 2025
  • Number of views: 3310
Video

The video provides a comprehensive guide on performing a single-phase rotor test on a three-phase squirrel cage motor to check for open rotor bars.

Rewind Tips For 2300-Volt, Random-Wound Motors

  • May 2025
  • Number of views: 2027
Article

From the manufacturer’s perspective, a random-wound, 2300-volt motor represents a substantial reduction in manufacturing cost. For the service center, the challenge is to successfully rewind them while providing a reliable repair. Here are some techniques which will enhance your success rate.

Consejos para rebobinar motores de alambre redondo de 2300 Voltios

  • May 2025
  • Number of views: 1578
Article

Desde la perspectiva del fabricante, un motor de 2300 voltios con bobinado aleatorio representa una reducción sustancial en el costo de fabricación. Para el centro de servicio, el reto es rebobinarlos con éxito y ofrecer una reparación confiable. Aquí hay algunas técnicas que mejorarán su tasa de éxito.

Cleaning Commutator and Slip Ring Surfaces with a Brush

  • April 2025
  • Number of views: 3481
Article

When there is a need for cleaning the contact surfaces of commutators and slip rings with brushes, emery cloth with aluminum oxide is NOT recommended, as conductive abrasive particles will cause arcing and damage to the surface. Many times, stone cleaning, garnet paper and machining are not a convenient, sufficient, or cost-effective option for machines as the priority is to keep the downtime to a minimum. This is when the carbon brush can be designed to clean up the contact surface.

Limpiando las superficies de los colectores y anillos rozantes con escobillas

  • April 2025
  • Number of views: 1383
Article

Cuando sea necesario limpiar las superficies de contacto de los colectores y anillos rozantes, NO se recomienda usar tela de esmeril con óxido de aluminio, ya que las partículas abrasivas conductoras pueden causar arcos eléctricos y dañar la superficie. Muchas veces, la limpieza con piedra, el papel granate (Garnett) y el mecanizado no son una opción conveniente, suficiente ni rentable para las máquinas, ya que la prioridad es minimizar el tiempo de parada. En este caso, la escobilla de carbón se puede diseñar para limpiar la superficie de contacto.