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EASA's private webinars

Displaying 1 - 25 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

DC Theory

This webinar describes, in practical terms, how a DC motor works. Working with basic principles of attraction-repulsion and magnets, the operation of a DC machine is explained without mathematical formulas. Some of the principles to be explained include:

  • the role of interpoles
  • armature coil pitch
  • the interaction of fields and armatures to create rotational torque
  • interpole polarity
  • brush neutral
  • compound-wound fields
Who should attend

Those involved in electric motor repair, from entry level to 30+ years of experience, will benefit from attending this session. Hands-on technicians, supervisors and sales personnel, as well as those who use DC machines, will learn from this webinar.

Topic(s): DC

DC Theory and Design 101

This webinar will cover:

  • Video animation of a DC motor
  • Attraction / repulsion explanation as magnets
  • Ampere-turns of armature, fields, interpoles
  • Determining the correct interpole circuits
  • Evaluation of armature designs
  • How to recognize opportunities for improvement
Who should attend

This webinar is intended for supervisors, winders and those desiring to learn more about DC machines.

Topic(s): DC, Theory & design

Dealing with Shaft and Bearing Currents

This session will address key issues related to shaft and bearing currents in electric motors and generators. Critical topics that will be covered include recognizing symptoms of shaft and bearing currents, and determining if damaging current levels are present. Also, possible causes of the damaging current, such as machine dissymmetry and operation on variable frequency drives (VFDs) will be dealt with. Methods of testing to confirm the presence of shaft or bearing currents will be described, as well as how to assess the magnitude of the damaging currents. Further, solutions to eliminate or control shaft and bearing currents, such as insulators, isolators, and ceramic bearings, will be offered.

Who should attend

This seminar will be most useful for service center and field technicians with at least 5 years experience, service center managers, engineers, or anyone with previous experience dealing with shaft and bearing current issues looking to expand their knowledge.

Topic(s): Bearings, Root cause failure analysis, Shafts

Drilling Down Into DC Design

This one-hour webinar will focus on:

  • How to use basic design rules to verify data for fields, interpoles and armatures
  • Verifying the correct armature coil pitch
  • Special cases where you can improve on the original armature design
  • What to do when the armature was received stripped, and the manufacturer no longer exists

Topic(s): DC, Theory & design

Drop Testing of Fields and Synchronous Poles: Tips to Interpretation

This session will cover the basics of drop testing, as well as offer tips for interpreting the results. Both the AC and DC drop test methods will be described as well as the advantages and drawbacks for each. For those cases where the drop test results are out of tolerance, this material will guide the technician in determining the reason for the variation—how to recognize the difference between shorted coils and differences in iron, airgap or other influences. Rewind and assembly tips will also be discussed, where they influence the results of a drop test.

Who should attend

This seminar will be most useful for service center and field technicians with at least 5 years experience, service center managers, engineers, or anyone involved in DC motor or generator repair, as well as those who are simply looking to expand their knowledge.

Topic(s): DC, Testing

EASA Accreditation Program

It has been proven that electric motor efficiency can be maintained during repair and rewind by following defined good practices. EASA has developed an international accreditation program for service centers based on the sources of these good practices. The intent of this groundbreaking accreditation program is to evaluate service centers for evidence of compliance to assure that they are using prescribed good practices to maintain motor efficiency and reliability during electrical and mechanical repairs of electric motors. Repair processes that will be audited include rewinding, core testing, bearing replacement, bearing journal rebuilding, dynamic balancing; and electrical testing, mechanical measurements and calibration. This webinar session will provide insight into the EASA Accreditation Program and the third-party audit process that is an ancillary and key component of it.

Who should attend

This seminar will be most useful for service center supervisors and managers. The content will be beneficial for entry level supervisors through managers and owners.

Topic(s): AC, DC, Repair tips/procedures, Sales, Marketing & Management

Evaluating High No-Load Amps of Three-Phase Motors

Have you ever had to deal with a rewound motor that had high no-load amps? That is almost a rhetorical question as most of us have experienced this situation. The focus of this session will be on the steps to take before rewinding, to avoid the undesirable situation of high no-load motor amps after the rewind.

Our focus will be on the following steps that should be performed on every AC stator rewind:

  • Inspect the stator bore and rotor outside diameter for evidence of machining or damage
  • Record the original winding data exactly as found
  • Verify the winding data
  • Test the stator core before and after winding removal
Who should attend

This seminar will be most useful for service center mechanics and winders with any level of experience, and service center supervisors and managers.

Topic(s): AC, Theory & design

Final Testing for Pumps - An Overview

The pump repairs are completed! Now the pump needs to be tested. This webinar will discuss the procedures for the basic tests that can be performed on pumps that have been repaired in the service center.

Final testing of pumps can include:

  • Operational Tests
  • Seal Leakage Test
  • Motor Chamber Leakage test (submersibles)
  • Casing Pressure Test

While some of these tests are not difficult to perform, knowing the methods and limits will help service centers to confidently deliver quality pump repairs.

Topic(s): Pumps, Testing

Final Testing of DC Machines

To assure a quality repair, there are specific tests (such as neutral-setting and interpole-armature polarity) that should routinely be performed on every DC machine. When done correctly, the simple procedures presented in this session will prevent scenarios such as that late night phone call from an irate customer whose DC machine is “arcing like a fireworks show.”

Who should attend

Technicians with at least a moderate level of experience in DC machine repair will benefit from this session.

Topic(s): DC, Testing

Fundamentals of Shaft Alignment

Automatic alignment instruments are no substitute for understanding the underlying process of aligning direct coupled machines. This webinar will explain the simple calculations that govern the alignment process. That understanding will allow technicians to use any alignment tool more effectively, and deal with issues that confound the process.

Topic(s): Alignment, Shafts

Handling Partial Discharge Issues

This webinar will cover:

  • An explanation of partial discharge (PD)
  • Description of the damage mechanism
  • PWM drive and partial discharge
  • How to evaluate partial discharge
  • Repair tips for dealing with partial discharge

Topic(s): Repair tips/procedures, Root cause failure analysis

How to Balance Overhung Fans

Often an overhung fan is balanced in a single plane, only to find that the vibration has shifted to the outboard bearing. Attempts to use standard two plane techniques may result in calculated correction weights that are very large and produce poor results. There are more effective ways to approach this common problem. This webinar will present a methodical approach and techniques for tackling this difficult balancing problem.

Who should attend

This webinar is intended for field service balancing technicians, supervisors and managers.

Topic(s): Balancing, Mechanical

Insulation Material Properties and Testing: How the Insulation System Works

This webinar covers:

  • Insulation system versus insulation materials
  • Stresses imposed on insulation systems
  • Insulation system components / functions
  • Typical testing of system components / functions

Topic(s): AC, Testing

Let's Get Organized: Reduce Waste & Optimize Productivity

5S is an effective methodology used to reduce waste and optimize productivity through maintaining an orderly workplace and using visual indicators to achieve more consistent results. Successful implementation frees up wasted space and reduces excess inventory and unplanned downtime.

The 5S pillars or phases are:

  • Sorting
  • Straightening
  • Shining
  • Standardizing
  • Sustaining

Attendees will be invited to participate in a series of simple simulation activities to amplify the benefits of implementing these simple approaches.

Who should attend
Executives, managers, team leaders and front line supervisors from the office and shop floor who want to understand and implement such a methodology.
Topic(s): Repair tips/procedures

Minimizing Risk with High-Voltage Rewinds

This webinar presents a product quality planning process for industrial motor stator windings rated above 4 kV. Emphasis will be placed on analyzing gaps between these projects and lower voltage rewinds as they relate to:

  • stator winding design
  • insulation system validation
  • process control
Who should attend

This seminar 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, Testing, Theory & design