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EASA's private webinars

Displaying 1 - 10 of 54 private webinars available

AC Motor Redesign: Speed Changes

This webinar will focus on AC motor redesigns involving speed changes. Service centers encounter scenarios such as the procurement of a single-speed motor that must be redesigned for two speeds or redesign of an existing two-speed motor for use on an adjustable-speed drive.

Topics covered will include:

  • Single-speed, one-winding to two-speed, one-winding
  • Single-speed, one-winding to two-speed, two-winding
  • Two-speed, two-winding to single-speed, one-winding
  • Two-speed, one-winding to single-speed, one-winding

The redesign examples will be performed using EASA’s AC Motor Verification & Redesign program, including use of the soon-to-be released integrated motor winding database for locating comparative data. Examples will include other changes such as voltage, frequency and horsepower.

Topic(s): AC, Theory & design

Adjusting Brush Neutral

This session will demonstrate how to set brush neutral in DC machines. Several methods, with the benefits and drawbacks of each, will be explained. This webinar includes tips for permanent magnet and series-wound machines. Included will be tips on how to recognize problems and settings that affect brush neutral, and what to check if the neutral adjustment seems higher than usual.

Who should attend
This seminar will be most useful for service center and field technicians involved in the repair of DC machinery, service center managers, engineers, or anyone involved in DC motor or generator repair, as well as those who are simply looking to expand their understanding.
Topic(s): DC

Advanced DC Testing

This webinar will share tips that are not covered in "Fundamentals of DC: Operation and Repair Tips", such as:

  1. Tips for interpreting armature and interpole tests
  2. Finding that ground in the newly rewound armature
  3. Interpreting questionable drop test results

It will also cover final assembly tests including how to determine whether the cause of sparking is the interpoles or the armature.

Who should attend

This webinar is aimed at the experienced technician and supervisor.

Topic(s): DC

Assessing Impeller Damage

The impeller is generally the most difficult pump component to repair and the most expensive to replace. This session will look at case histories of failed pumps and the steps to determine the cause of failure

  • Erosion, corrosion, cavitation or wear: What happened to this impeller?
  • How to spot the tell-tale signs
  • What operational conditions led to impeller damage

Topic(s): Mechanical, Pumps, Root cause failure analysis

Babbitt Bearings

This webinar will address:

  • Theory and design of babbitt bearings
  • Fitting / scraping of babbitt bearings
  • Speed limitations
  • Care and handling
  • Oil recommendations and considerations
  • Solutions and common causes of oil leaks
Who should attend

This webinar will benefit supervisors, managers, sales personnel, machinists and mechanics.

Topic(s): Bearings, Repair tips/procedures

Balance Quality Requirements of Rigid Rotor—Applying ISO 1940/1

When is a machine rotor or armature balanced “good enough” and how does that relate to how smoothly the machine runs? How much a machine will vibrate (or how smoothly it will run) depends on quite a number of variables besides balance.

This webinar will provide valuable and practical information on this topic. Additionally, it will cover balance quality grades and how to determine if a rotor meets the appropriate grade as well as some of the factors that affect the final vibration level.

Topic(s): Balancing

Basics of Machinery Foundations and Bases

A faulty machine foundation or base can lead to excessive vibration and premature failure. This webinar will explain the fundamentals of machinery foundation construction and how to identify and trouble shoot machine base problems, including basic vibration techniques and ODS analysis.

Topic(s): AC, DC, Alignment, Mechanical, Vibration

Bearing Analysis and Failure Modes

This webinar will identify and define these failure modes:

  • True and false brinelling
  • Spalling
  • Fluting (bearing current)
  • Cage damage
  • Fretting
  • Loss of fits
  • Lubrication problems
  • Shields and seals
  • Skidding
  • Preload
  • Internal clearance
  • Load zone and ball track
  • Key indicators: temperature, noise, vibration

Topic(s): Bearings, Root cause failure analysis

Belt Loads

This session will address the impact of overhung loads on bearing life. Critical factors include belted horsepower, belt tension, sheave sizes and sheave location. The use of ball bearings versus roller bearings will be considered as well as the factors that affect that decision. Not all belted loads should be roller bearings! Methods to calculate the bearing load and maximize life of the bearings will be shown.

Who should attend

The webinar will be most useful for service center and field technicians, service center managers, and engineers with a need to understand how overhung loads can lead to catastrophic bearing failure.

Topic(s): Bearings, Mechanical

Concentric or Lap? Considerations for the 2-Pole Stator Rewind

Two-pole motors present special rewind issues, especially when converting them from concentric to lap windings. The pitch is especially important as certain coil pitches will cause harmonics that have a negative impact on performance. Optimum pitches are often very difficult to wind and shorter pitches result in sacrificed conductor area. This webinar will explore sample redesigns and present some guidelines to assist in deciding between the concentric and lap winding.

Who should attend
This webinar will be most useful for service center winders, engineers, supervisors and managers. The content will be beneficial for beginners through highly experienced persons.
Topic(s): AC, Repair tips/procedures, Theory & design