Presented by Chuck Yung
EASA Senior Technical Support Specialist

When we rebuild electric motors and help customers solve application problems, there are two unique accessories that are worth reviewing. Because eddy-current couplings and fluid couplings are uncommon, the institutional knowledge about them is being lost. This webinar recording is intended to preserve the knowledge of how they work as well as their unique repair requirements.

The eddy-current coupling or clutch is old-school technology, but their robust design is appreciated by many industries.

• How an eddy-current coupling works
• Drum and spider design features
• Pilot bearing and internal alignment “shaft deflection”
• Lubrication features
• Cooling requirements

Fluid couplings offer a reliable method for an electric motor to accelerate normally while the driven high-inertia load accelerates more slowly. These offer a good alternative to special Design C or D motors. As simple as they appear, the fluid coupling is very expensive and offers another revenue stream for those able to work on them.

• How a fluid coupling / clutch works
• Adjusting acceleration time and torque transmission
• Repair tips and essentials
• Bearing replacement
• Sealing the halves

This webinar explains how each of these devices work, with repair tips and application information for each.

Tom Bishop, P.E.
EASA Senior Technical Support Specialist

This webinar recording reviews electric motor bearing grease and oil lubrication frequency and quantity, as well as procedures – and the steps to be sure to get all of this right. 

• Grease and oil lubrication frequency and quantities for ball and roller bearings
• Grease and oil lubrication procedures for ball and roller bearings
• Oil lubrication frequency and quantities for sleeve bearings
• Oil lubrication procedures for sleeve bearings

This recording is intended for mechanical technicians, field service technicians, shop supervisors and engineering staff.

A special discounted collection of 7 webinar recordings focusing on various aspects of electromechanical repair.

Once purchased, all 7 recordings will be available on your "Downloadable products purchased" page in your online account.

Downloadable recordings in this bundle include:

Time-Saving Repair Tips
Presented August 2014

This webinar shares:

• The secrets used by other service centers to gain a competitive edge in the repair process.
• Mechanical, winding and machining tips reduce repair time, help avoid unnecessary rework, and decrease turn-around time.

Target audience: Supervisors, machinists, mechanics, winders, and sales personnel who interact with the end user.

Repair Best Practices to Maintain Motor Efficiency
Presented June 2012

There are certain repair processes, such as winding removal and replacement, that can impact the efficiency and reliability of electric motors. Prudent repair practices must not increase overall losses, and preferably should maintain or reduce them.

This presentation explains how those repair processes affect efficiency and reliability, and gives the best repair practices in order to maintain or improve efficiency.

Target audience: This presentation is most useful for service center inside and outside sales representatives, customer service personnel, engineers, supervisors and managers. The content will be beneficial for beginners through highly experienced persons.

Practical Problem Solving for the Entire Service Center
Presented August 2013

This presentation focuses on a report format developed by Toyota for a simple, yet methodical approach to document improvement. Whether you're dealing with problems related to sales, purchasing, repair or testing, if all team members can learn to speak the same, simple problem-solving language, they can tackle problems efficiently and effectively.

Target audience: This presentation is best suited for executives, managers, team leaders and front line supervisors from the office and service center who want to understand and implement such a program.

Induction Motor Speed Control Basics
Presented March 2019

Induction motors are most often applied to what are essentially constant speed drive applications. However, the use of induction motors in variable speed applications continues to grow, primarily due to technology advances in power electronics. This webinar will review speed control basics for induction machines.

• Wound-rotor motor speed control
• Squirrel-cage speed control by pole changing
• Squirrel-cage motor speed control by variable voltage, fixed frequency
• Squirrel-cage speed control by variable voltage, variable frequency

AC Motor Assembly and Testing
Presented August 2018

This webinar recording focuses on:

• Motor assembly issues
• Electrical and mechanical inspection
• Static and run testing
• AC motors with ball, roller and sleeve bearings

Target audience: This webinar recording is most useful for service center mechanics, supervisors and engineers. The content will also be beneficial for machinists, managers and owners.

On-Site Testing & Inspection of Electric Motors
Presented July 2015

This webinar covers electrical testing and inspection of installed electric motors, including:

• Condition assessment for continued service
• Diagnostic fault testing and interpretation
• Physical inspection key points

Selecting Replacement DC and 3-Phase Squirrel Cage Motors
Presented September 2019

On many occasions, a different motor type is desired or needed. In these cases it is essential that the replacement motor provides the required performance, and do so reliably.

This presentation focuses primarily on the electrical aspects of selecting replacement motors. It also addresses speed and torque considerations.

• DC motor to DC motor
• DC motor to 3-phase squirrel cage motor
• AC motor to 3-phase squirrel cage motor

Target audience: Anyone involved with selecting replacement motors or diagnosing issues with replacement motor installations.

Presented by Mike Howell, PE
EASA Technical Support Specialist
Panelist: Craig Whitworth, EASA Product Development Specialist

The Electromechanical Repair Technician (ERT) Certificate Program provides new, existing, and potential employees in the electromechanical repair industry a structured learning path to become a well-rounded service center technician. The earned certificate will provide the student with a tangible and verifiable way to demonstrate to others that they have the necessary mechanical repair foundation to play a productive role in the service center. Topics covered in this recording include: 

• What the ERT certificate program is 
• What is required to earn the ERT certificate 
• A typical pathway for completion 

This presentation is intended for anyone wanting to learn more about the ERT program. 

A special discounted collection of 11 webinar recordings focusing on electromechanical theory and application.

Once purchased, all 11 recordings will be available on your "Downloadable products purchased" page in your online account.

Downloadable recordings in this bundle include:

Minimizing Calibration Costs
Presented February 2016

This presentation covers :

• Quantities/qualities of measuring and test equipment utilized in the industry
• How to locate/source qualified calibration suppliers
• Costs of internal / external calibration for some measuring and test equipment

Drilling Down Into DC Design
Presented May 2013

This presentation focuses 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

DC Theory and Design 101
Presented February 2017

This webinar covers:

• 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

Target audience:  Supervisors, winders and those desiring to learn more about DC machines.

DC Brush Neutral: What It Means and Interpreting Results
Presented April 2018

This presentation covers:

• How much voltage output is too much?
• What can cause higher than desired output voltage?
• Brush spacing, brush seating, field or interpole spacing & polarity
• Interpole circuits

Wire Size Changes 101: Tools and Methods for Avoiding Costly Mistakes with the Most Common Redesign
Presented June 2018

This webinar focuses on:

• Proper wire measurements
• Metric and AWG sizing
• Aluminum to copper
• Random to form wound and vice versa
• Stator windings, field windings, interpoles
• Using wire combination tables
• Using EASA’s AC Motor Verification & Redesign software

Target audience: This webinar will benefit service center technicians and supervisors.

Motor Winding Temperature and Detectors to Measure It
Presented October 2013

This presentation begins with an overview of ambient, winding temperature rise, and winding temperature. It also covers factors for motor temperature rise limits such as motor size (medium or large), insulation class rating, service factor and the enclosure. The final part of the presentation addresses detectors for measuring winding temperature, namely thermostats, resistance temperature detectors (RTDs), thermocouples and thermistors.

Target audience: This presentation is most useful for service center winders, engineers, supervisors and managers. The content will be beneficial for beginners through highly-experienced persons.

Winding & Bearing Sensing Devices
Presented May 2014

This presentation addresses the topic of a various temperature sensing devices including RTDs, thermostats, thermocouples and thermistors. The advantages of each and the proper application will be covered.

Target audience: This presentation will be most useful for service center sales personnel, engineers, supervisors and managers. The content will be beneficial for moderate through highly-experienced persons.

Insulation Material Properties & Testing: How the Insulation System Works
Presented April 2016

This webinar recording covers:

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

Insulation Testing of Motors and Generators
Presented June 2017

This webinar covers:

• Types of tests: Insulation resistance, Polarization index, High potential, Surge, Partial discharge test
• Testing of machines: Motors (AC and DC), Generators (AC and DC)

Target audience: This webinar will be most useful for service center supervisors, electromechanical technicians, winders and field service personnel.

Handling Partial Discharge Issues
Presented January 2013

This presentation covers:

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

Reclosure: How It Happens and What To Do About It
Presented February 2015

Reclosure occurs when power to a motor is briefly interrupted and restored before the magnetic field has fully collapsed in the motor’s winding. If this occurs while the applied power is out of phase with the collapsing field, significant damage can result. This webinar will address how this can happen and what measures can mitigate damage potential.

Topics covered include:

• Reclosing a switch or breaker before the magnetic field collapses
• Utilities’ automatic reclosure
• Contactor “chatter”
• Determining the time constraint
• Remedies: Time delay; Zero crossing

Presented by Tom Bishop, P.E.
EASA Senior Technical Support Specialist

Following the squirrel cage induction motor, what will come next? This webinar provides an overview of potential successor technologies.

• Permanent magnet (PM) motors
  • Hybrid permanent magnet (HPM) motors
  • Across the line start PM (LSPM) motors
  • High torque low speed PM motors
  • Surface permanent magnet (SPM) motors
  • Interior permanent magnet (IPM) motors
• Reluctance motors
  • Synchronous reluctance motors (SynRM)
  • Switched reluctance motors (SRM)
• Other motor technologies nearing reality
  • Amorphous metal designs
  • Axial flux ferrite PM motors

This webinar benefits anyone dealing with sales, service or repair of these and other emerging technology motors.

Global vacuum pressure impregnation is the most common insulation system processing method utilized for form wound stators today. A successful VPI depends on several variables including materials, methods and maintenance. This recording will provide information to assist the service center with ensuring success with form wound VPI projects.

Target audience: This recording will be most useful for service center winders, engineers, supervisors and managers. The content will be beneficial for beginners through highly-experienced persons.

This presentation focuses on the steps to take before rewinding to avoid the undesirable situation of high no-load motor amps after the rewind.

The presentation covers 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 rewinding removal

This presentation is most useful for service center mechanics and winders with any level of experience, and service center supervisors and managers.

Tom Bishop, P.E.
EASA Senior Technical Support Specialist

Determining the source of noise in a motor is often much more challenging than correcting it. However, a methodical approach to investigating the noise can narrow down the possible causes and therefore make it easier to resolve the noise issue. In this session we will address the causes and characteristics of the primary sources of noise in AC motors. Specific topics to be addressed:  

• Magnetic noise (aka “electromagnetic noise” or “electrical noise”) 
• Mechanical noise 
• Windage noise 
• Guidance for reducing or eliminating the intensity of these noise sources

This webinar recording is intended for mechanics, supervisors and testing technicians.

Presented by Tom Bishop, PE
EASA Senior Technical Support Specialist

This recording covers the broad topic of high no-load current with 3-phase motors and the issue of high current with load with 3- phase motors. Also covered are the cases of lower than expected no-load current. 

Primary topics are:

• High no-load current – motor not rewound
• High no-load current – rewound motor
• High current with load

This presentation is intended for mechanical technicians, winders, supervisors, engineers and managers. 

The pump repairs are completed! Now the pump needs to be tested. This presentation discusses 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.

To assure a quality repair, there 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 will prevent scenarios such as that late night phone call from an irate customer whose DC machine is "arcing like a fireworks show."

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

Automatic alignment instruments are no substitute for the underlying process of aligning direct-coupled machines. This presentation explains 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.

Carlos Ramirez
Especialista de Soporte Técnico de EASA

Este webinario ayudará a los centros de servicio a navegar a través de los aspectos fundamentales del rediseño de motores de CA y ayudará a prevenir errores costosos asociados a los rediseños incorrectos. Los centros de servicio son contactados frecuentemente, para realizar rediseños y cambiar el voltaje, la frecuencia o la conexión del bobinado, entre otros.

El webinario incluye:

• Toma correcta de las medidas del núcleo
• La fórmula maestra
• Cambio en la conexión del bobinado
• Cambio de Paso (Pitch)
• Cambio velocidad o del número de polos
• Cambio de potencia

Este webinario está dirigido a bobinadores, supervisores y personal de ingeniería.

Presented by Preston Reine
IHS Markit

This update addresses the global low-voltage (LV) motor and variable-speed drive (VSD) markets, with a discussion of systems efficiency. It provides market revenues and units with supporting qualitative analysis regarding changes in manufacturing, distribution, and other technological advancements.

How will governmental legislation of motors affect the markets at global and regional levels? New amendments to existing MEPS (minimum energy performance standards) in both the EU and North America have now had a significant influence on the market's sales of higher efficiency, low-voltage motors and VSDs.

The session also covers:

• Growing motor technologies such as IE4 Super Premium designs
• Other major trends influencing the global motor market
• A market share profile of the leading suppliers
• The state of the VSD market's penetration at an industry level
• Emerging trends such as the Industrial Internet of Things (IIoT)
• The continuance of motor and drive suppliers embracing a "full system" approach to energy efficiency, downtime reduction and productivity optimization

This presentation covers:

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

Presented by Sarah Widder and Nate Baker
Cadeo

As COVID-19 and its physical and economic impacts reshape new and existing industrial and commercial systems, operators are looking at how to most efficiently run existing commercial and industrial spaces that may be used very differently in the future.

While adding variable speed capability in commercial buildings is not a new idea, a new analysis confirms major energy and cost savings is available by pairing those products with a power drive system (PDS) – regardless of a pump’s load variability. A PDS combines an electric motor, adjustable speed controls and sensors that provide feedback to the equipment, allowing the equipment to slow down or speed up to meet current demand. This idea and the added flexibility a PDS can provide may be even more important as we move forward in uncertain times.

Speaker Bios
Sarah Widder
Sarah Widder is currently a director at Cadeo, an energy efficiency consulting firm that works with utilities, non-profits, industry and regulatory agencies to promote adoption of energy-saving technologies and practices in the marketplace.  In her current role, Sarah has been working with the Northwest Energy Efficiency Alliance and other trade associations to develop market transformation programs for motor driven equipment under NEEA’s Extended Motor Products (XMP) Initiative.  Sarah started working on motor-driven technology in her previous job at Pacific Northwest National Laboratory, where she supported test procedure development for the U.S. Department of Energy (DOE) and led development of a new test procedure and efficiency metric for pumps, the Pump Energy Index (PEI).  Sarah has a B.S. in Chemical Engineering from the University of Washington and a PhD in Civil Engineering from Washington State University.    

Nate Baker
As a senior associate and member of Cadeo's engineering team, Nate Baker leverages his background in industrial facilities to support energy efficiency program design and regulatory review. Most recently, his work has focused on supporting efforts to increase energy efficiency in motor-driven equipment and adoption of energy efficient technology in commercial and industrial applications broadly. His research has supported program development by establishing unit energy savings estimates for pumps and fans and documenting operational characteristics of clean water pumps. Nate also provides technical expertise to support the development of energy conservation standards and test procedures.

High-potential testing is routinely used to assess the ground insulation of AC stator windings in-process, after completion of a rewind and post-delivery. This webinar covers:

• Differences between AC and DC high-potential tests
• Sizing AC test sets when testing large windings
• What relevant standards address (and what they don’t)
• Communicating test requirements to all stakeholders
• When to test and at what levels
• How to evaluate results

Beneficial for service center managers, supervisors and technicians responsible for high-potential testing.

Matthew Conville, P.E.
EASA Technical Support Specialist

Many service centers have adopted lean principles or other methods and have seen only marginal gains. This presentation discusses the importance of tracking rework in the shop and how it can lead to focused training opportunities, improved turnaround times and improved profitability.

• What is a rework?
• What data to collect
• How this can impact lead times?
• How this can be used for training opportunities?

This recording is intended for shop managers, foremen and shop employees interested in process improvement.

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 presentation shows a methodical approach and techniques for tackling this difficult balancing problem.

Target audience: This presentation is intended for field service balancing technicians, supervisors and managers.

This presentation demonstrates an easy-to-build temporary oven that can be constructed in the service center or in site. The recording covers:

• Materials to use and where to obtain
• Heating: electric, propane, or other?
• Measuring winding temperature
• Regulating oven temperature
• Storage of the parts when not in use
• Safety concerns and cautions

Target audience: This presentation will benefit service center supervisors and management.

Presented by Matthew Conville, MBA, PE
EASA Technical Support Specialist

This webinar recording covers the various types of trips or faults that occur in applications, as well as some of the causes for these events. Identify various types of trips, faults and their causes including:

• Instantaneous
• Overload/thermal
• Ground fault
• Phase loss
• Typical low voltage breaker types and their settings
• Thermal magnetic
• Electronic

This recording is intended for field service, electrical technicians, engineering personnel and outside sales.

Presented by Carlos Ramirez
EASA Technical Support Specialist

Is the motor drawing high no-load amps and winding data are correct? Are you experiencing unusual heating of the stator under load? Those common questions can be answered by checking the stator core condition. This presentation will discuss how to perform a stator core test using a loop test. It also will explain how to analyze the results, providing information about the associated equipment, tips for repairing core damage and explain other alternatives for stator core testing.

The presentation covers:

• Loop test theory
• Testing procedure
• Acceptable limits for losses and core temperatures
• Associated equipment
• Tips for repairing core damage
• Alternative stator core test

This presentation will be useful for supervisors, winders and test technicians.

Presented by Tom Bishop, P.E.
EASA Senior Technical Support Specialist

This webinar recording focuses on the effect of three-phase stator winding changes on efficiency and reliability.

Specific changes addressed will include:

• Connection
• Circuits
• Turns
• Span/pitch
• Grouping sequence
• Concentric to lap, and vice versa
• Wire area per turn and per slot

Target audience: Service center technicians and supervisors.

Mike Howell, PE
EASA Technical Support Specialist

The markings on the external leads of a motor sometimes become defaced or are removed, which makes it necessary to identify and mark them before the motor can be properly connected to the line. This presentation reviews procedures that explain how to identify unmarked leads of three-phase motors with one or two windings.

Topics include:

• IEC / NEMA numbering systems 
• Three-lead machines 
• Six-lead machines 
• Nine-lead machines
• Twelve-lead machines

This presentation is intended for all personnel who troubleshoot machines with unmarked leads.

There are changes in the National Electrical Code that EASA members need to know about. View this webinar to learn:

• The background behind these changes
• The 2020 change impacting reconditioned motors
• How the changes will be interpreted
• What the changes mean for the electric motor service industry

This presentation covers the following topics:

• Induction motor basics for operation
• Squirrel-cage
  • Conductor material
  • Deep-bar effect
  • Multiple-cage windings
  • Phase resistance
  • IEC/NEMA design letters
  • Speed-torque characteristics
• Wound-rotor
  • Winding construction
  • Wave-wound connections
  • Distribution factor and chord factor
  • Rotor phase voltage
  • Speed-torque characteristics

Target audience: This webinar will benefit service center technicians and supervisors. 

Mike Howell
EASA Technical Support Specialist

Induction motors are most often applied to what are essentially constant speed drive applications. However, the use of induction motors in variable speed applications continues to grow, primarily due to technology advances in power electronics. This webinar will review speed control basics for induction machines.

• Wound-rotor motor speed control
• Squirrel-cage speed control by pole changing
• Squirrel-cage motor speed control by variable voltage, fixed frequency
• Squirrel-cage speed control by variable voltage, variable frequency

This webinar recording covers:

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

Presented by Mike Howell, EASA Technical Support Specialist

Most modern rotating electric machines operate on the same principles their predecessors have for 100+ years. However, improvements in materials technology over that time have allowed for increasingly greater power density in machine design.

There is a natural time lag between OEM technology improvement and repair of equipment containing that technology. This session will explore some of these improvements and their implications for service centers attempting to provide a quality repair.

Target audience: This presentation will be appropriate for service center managers and technicians responsible for rewind activities.

This webinar covers:

• Types of tests: Insulation resistance, Polarization index, High potential, Surge, Partial discharge test
• Testing of machines: Motors (AC and DC), Generators (AC and DC)

Target audience: This webinar will be most useful for service center supervisors, electromechanical technicians, winders and field service personnel.

Tom Bishop, P.E.
EASA Senior Technical Support Specialist

This webinar recording reviews the failures associated with 3-phase motors on Variable Frequency Drives (VFDs) and how to rewind to limit future failures. The transient over-voltages produced by the VFD can cause the winding insulation to break down. Motor manufacturers and service centers have recognized that the winding insulation system must be enhanced to help withstand the effects of being used on a VFD. Topics include:

• Brief overview of the transient voltage phenomena
• Materials for an inverter-duty winding system
• Processes for an inverter-duty winding system
• Other considerations: cables, VFDs

This webinar is intended for winders, shop supervisors and engineering staff.

Presented by Mike Howell
EASA Technical Support Specialist

Choosing an appropriate lead wire for a new stator winding is an important task. The manufacturer’s information is not always available, or the number of circuits or external connection may have been changed, requiring a redesign of the lead wire.  This webinar reviews: 

• Commonly available materials 
• Lead wire insulation classes 
• Lead wire voltage classes 
• General sizing procedures 

This webinar is intended for repair technicians and anyone who needs to select lead wire.  

In this new webinar created specifically for owners, general managers and sales leaders, highly rated 2019 EASA speaker Mike Weinberg shares strong words of encouragement, practical coaching tips, and powerful best practices for leading (sales teams) through this unique time.

This session covers:

• Critical Characteristics for Leading Through Crisis
• Balancing Empathy & Accountability
• Remaining On-Mission: The Duty of Sales
• Success Stories from Sellers
• Choosing Perseverance & Positivity over Pity Parties & Panic
• Fly. The. Airplane. – Focusing Exclusively on Fundamentals
  • 1:1 Accountability for Results, Pipeline & Activity
  • Sales Team Meetings that Energize & Equip Salespeople
  • Addressing Underperformance & Complacency
  • Pointing the Team
  • Arming the Team

Mike's passion is helping sales teams win more New Sales!

He's become one of the most trusted and sought after sales experts and has led workshops and consulted on five continents in the past year. Mike is the author of three Amazon #1 Bestsellers: #SalesTruth, New Sales. Simplified., and Sales Management. Simplified. which is the most reviewed sales management book on Amazon and been called "arguably the best book ever written on sales management." Inc. Magazine also heaped praise on his work, saying that it’s “the #1 book every sales leader should read.”

This recording will help you get organized using the “5+1 S Series.”

The “5S” program covers these goals:

• Sort
• Straighten
• Shine
• Standardize
• Sustain

The additional “S” has been added by EASA and covers safety.

Starting in February 2019, members of the Management Services Committee will also write Currents articles on how each “S” can help you with a path to productivity by becoming more efficient, or lean.

Are you aware of the federal employment law related to COVID-19 that could impact your business? This EASA-exclusive webinar will make sure you are in compliance!

If your company was granted a Paycheck Protection Program (PPP) loan, do you know all the parameters for making sure the loan is forgiven? View this webinar recording to be sure!

Presented by expert attorney and consultant David Schein, MBA, JD and PhD, President and General Counsel of Claremont Management Group. David has been a highly-rated and well-received speaker at past EASA conventions.

Presented by Matthew Conville, MBA, PE
EASA Technical Support Specialist

This webinar recording explains the basics of low voltage AC drive types and control methods. As VFDs and their applications have become more complex, it can be difficult to determine what type of VFD will be required for an application and how the motor needs to be controlled. Topics covered include:

• Types of Drives
  • Single Quadrant, SQ with Braking, Regenerative and Active Front End
• Types of Control
  • V/Hz (Scalar), Vector Sensorless (Open Loop Vector), Vector (Close Loop Vector)
• VFD Selection for Application

Target audience: Anyone new to VFD applications, or anyone in need of a refresher course.

Presented by Mike Howell
EASA Technical Support Specialist

Technicians are sometimes introduced to magnetic quantities and materials informally over time as they are trained. This webinar recording introduces basic magnetic circuits and magnetic materials encountered in rotating machines more formally. The magnetic circuit overview includes magnetic flux, flux linkage, inductance and energy. Air gaps, steels used to produce stator and rotor cores, and permanent magnets are also discussed. Topics include:

• Basics on magnetic circuits
  • Magnetic flux
  • Flux linkage,
  • Inductance and energy
• Basics on magnetic materials
  • Types of steel used in stators and rotors
  • Air gaps
  • Permanent magnets

This webinar is intended for anyone new to the industry, or just in need of a refresher.

An increasing number of manufacturers are using magnetic wedges in their form-wound machines. When a winder fails to replace magnetic wedges in kind, the winding temperature rise can increase by 20°C, and the magnetizing current can increase by 20% or more.

This recording explains why they are used, provides a balanced review of the benefits and negative issues associated with their use, and explains how to avoid the problems.

• Why some manufacturers use magnetic wedges
• Benefits of magnetic wedges
• Downside of magnetic wedges
• Fitting and installation to prevent them from falling out in service

Target audience: This will benefit service center technicians and supervisors.

A special discounted collection of 9 webinar recordings focusing on various aspects of mechanical repair of electric motors.

Once purchased, all 9 recordings will be available on your "Downloadable products purchased" page in your online account.

Downloadable recordings in this bundle include:

Proper Motor Cleaning: Avoiding Damage to the Motor and the Environment
Presented March 2015

This presentation examines features, benefits and drawbacks of both conventional and alternative methods of cleaning electric motors.

Methods covered include:

• Immersion tanks
• Steam cleaning
• Parts-washing machines
• Pressure washers
• Abrasives
• Ultrasonic devices

Environmental options for handling waste by-products are also addressed. If you are considering changing your cleaning methods, this webinar is for you.

Understanding Mechanical Fits
Presented November 2017

This presentation explores the basics of fits in mechanical assemblies, some of the standards that define them and their application in the inspection and repair of rotating electrical machines.

Target audience: Individuals responsible for performing mechanical inspections of fits, familiar with general electric motor assemblies.

Motor Lubrication Cautions & Tips
Presented December 2012

Lubrication is a vital part of any machine that moves. Understanding the mechanism that grease and oil use to provide that lubrication is important so that the maximum life of the equipment can be achieved.

This presentation discusses ways to get the most benefit from the lubricant by choosing the proper oil or grease and properly maintaining the equipment.

Critical to the process are compatibility, re-lubrication quantity and frequency and avoiding contamination.

Target audience: This presentation is most useful for service center and field technicians, service center managers and engineers desiring to specify the proper lubricant and help motor users understand proper re-lubrication for the best effect.

Bearing Analysis and Failure Modes
Presented May 2012

This presentation identifies and defines 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 and vibration.

Target audience: The presentation is most useful for service center and field technicians, service center managers, and engineers desiring to analyze bearing failures to prevent future failures.

Axial Thrusting Causes and Corrections (Motors)
Presented September 2017

This presentation reviews the causes of axial thrust loading on bearings in motors and determine appropriate corrective actions. 

• Vertical mounting
  • Vertical turbine pump
  • Sheave
  • Fans
• External thrust loads
  • Fans
  • Misalignment
• Internal thrust loads
  • Bearing journal shoulder to shoulder
  • Bearing seat
  • Bearing caps
  • Wavy washer
  • Bearing housing taper
  • Thermal expansion
• Dissect a bearing

 Target audience: This presentation would benefit engineers and mechanics looking for the root cause of bearing failures.

Babbitt Bearings
Presented October 2017

This presentation addresses:

• 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

Target audience: This presentation will benefit supervisors, managers, sales personnel, machinists and mechanics.

Vertical Motor Maintenance and Repair
Presented November 2013

This presentations covers:

• Thrust bearing systems
• Vertical motor types
• Types of bearings
• End play adjustments
• Lubrication
• Accessories
• Assembly cautions

Vertical Bearing Systems and Setting End Play
Presented August 2011

This presentation looks at various configurations of vertical motor thrust bearing arrangements. It focuses on the reason for having or not having end play, what that end play should be and how to get there. Some pitfalls of setting end play such as internal bearing clearance, spring loaded bearings and back-to-back bearing sets also are examined.

Target audience: This presentation is most useful for service center and field technicians, service center managers, and engineers involved in the disassembly and reassembly of vertical motors with thrust bearings.

How to Construct and Operate a Temporary Bake Oven
Presented October 2018

This presentation demonstrates an easy-to-build temporary oven that can be constructed in the service center or in site. The recording covers:

• Materials to use and where to obtain
• Heating: electric, propane, or other?
• Measuring winding temperature
• Regulating oven temperature
• Storage of the parts when not in use
• Safety concerns and cautions

Target audience: This presentation will benefit service center supervisors and management.

This webinar covers :

• Quantities/qualities of measuring and test equipment utilized in the industry
• How to locate/source qualified calibration suppliers
• Costs of internal / external calibration for some measuring and test equipment

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

• Stator winding design
• Insulation system validation
• Process control

Target audience: This presentation is most useful for service center winders, engineers, supervisors and managers. The content targets beginners through highly experienced persons.

Tom Bishop, P.E.
EASA Senior Technical Support Specialist

Cleaning of electric motor parts is performed in every electrical apparatus service center. This begs the question of whether or not cleaning is being done productively and with minimal safety and environmental consequences.

This webinar recording addresses some of the more common conventional methods of electric motor cleaning and some alternative methods, including:

• Methods
  • Solvent
  • Aqueous (water-based)
  • Other more aggressive methods
• Selection factors
  • Size and quantity of parts to be cleaned
  • Type of part, e.g., stators, rotors, housings
  • Type of cleaning agent: solvent or aqueous
• Environmental and safety concerns

This webinar recording will benefit service center managers, supervisors and technicians.

Lubrication is a vital part of any machine that moves. Understanding the mechanism that grease and oil use to provide that lubrication is important so that the maximum life of the equipment can be achieved.

This presentation discusses ways to get the most benefit from the lubricant by choosing the proper oil or grease and properly maintaining the equipment.

Critical to the process are compatibility, re-lubrication quantity and frequency and avoiding contamination.

Target audience: This presentation is most useful for service center and field technicians, service center managers and engineers desiring to specify the proper lubricant and help motor users understand proper re-lubrication for the best effect.

This webinar addresses the topic of a three phase squirrel cage motor’s ability to successfully accelerate a driven load. Although a motor can drive a running load, that is not assurance that it has the capability to accelerate the load up to rated speed. The difference between success and failure is determined by some complex conditions. For example, the motor torque during starting is not constant, and unless the load is a pure inertia load (very rare), it does not have a constant speed-torque relationship. Key considerations addressed include acceleration time, acceleration torque, motor heating, stator and rotor limits, and torque variables.

Target audience: This presentation will be most useful for service center sales personnel, engineers, supervisors and managers. The content will be beneficial for moderate through highly experienced persons.

Chuck Yung
EASA Senior Technical Support Specialist

This webinar recording discusses motor storage and drills down into the nuances of maximizing customer perceived value. There are practical considerations such as cost-effective climate control and using motor storage to obtain more repair work.

• Dewpoint and relative humidity
• Anti-vibration storage
• Bearing protection practices
• Service value

This webinar recording is intended for managers, sales personnel and company owners.

This webinar discusses:

• Temperature rise
  • Method of detection
  • Insulation class
  • Enclosure
  • Service Factor
• Increasing winding life
  • Insulation class
  • Cooling system
  • Winding redesign

Target audience: This webinar will be most useful for service center engineers, supervisors, managers and owners. The content will also be beneficial for mechanics and winders.

This presentation begins with an overview of ambient, winding temperature rise, and winding temperature. It also covers factors for motor temperature rise limits such as motor size (medium or large), insulation class rating, service factor and the enclosure. The final part of the presentation addresses detectors for measuring winding temperature, namely thermostats, resistance temperature detectors (RTDs), thermocouples and thermistors.

Target audience: This presentation is most useful for service center winders, engineers, supervisors and managers. The content will be beneficial for beginners through highly-experienced persons.

Anyone dealing with installed machinery, or even test running motors in the service center, will encounter instances where structural resonance is amplifying machine vibration. The machine may meet stringent specifications in one instance but exceed acceptable vibration levels in another. A good understanding of natural frequencies and the tests necessary to identify them will help solve these vexing situations.

This presentation covers:

• What is a natural frequency and why do they exist
• How to conduct a basic bump test with a single channel analyzer
• What is a modal analysis and what additional information does it provide
• Related tests and concerns

This webinar is useful for service center technicians, supervisors and managers.

This webinar covers electrical testing and inspection of installed electric motors, including:

• Condition assessment for continued service
• Diagnostic fault testing and interpretation
• Physical inspection key points

Mike Howell
EASA Technical Support Specialist

The open stator impedance test (a.k.a, ball test or dummy rotor test) is used by many service centers as a quality control check before winding treatment and/or a troubleshooting test. This webinar recording reviews test procedures, expected outcomes and incorporating thermal camera imaging. Topics covered include:

• Understanding the principles of the test
• Performing the test safely and consistently
• Expanding the value of the test with thermography 

This webinar recording is intended for personnel responsible for testing stator assemblies.
 

Gene Vogel
EASA Pump & Vibration Specialist

This presentation provides an overview of common predictive technologies and information about applying them correctly.  While providing break-fix service and analysis is not uncommon for a service center’s field service team, the industry is pushing more towards failure prevention methods and testing and this requires a shift in tools and thought processes. Topics include:

• Ultrasonic analysis
• Vibration analysis
• Oil analysis
• Thermography

This presentation is best for technicians, field service, shop managers and engineering staff.

This presentation examines features, benefits and drawbacks of both conventional and alternative methods of cleaning electric motors.

Methods covered include:

• Immersion tanks
• Steam cleaning
• Parts-washing machines
• Pressure washers
• Abrasives
• Ultrasonic devices

Environmental options for handling waste by-products are also addressed. If you are considering changing your cleaning methods, this webinar is for you.

Carlos Ramirez
Especialista de Soporte Técnico de EASA

Las pruebas de Resistencia de Aislamiento, Relación de Absorción Dieléctrica (DAR) e índice de Polarización (IP) son herramientas comúnmente usadas para evaluar la condición del aislamiento de las máquinas eléctricas rotativas y para confirmar la integridad del sistema de aislamiento a tierra, detectando la presencia de humedad que puede ocasionar fallos en los devanados. En las máquinas grandes, un adecuado análisis de tendencias ayuda a detectar cambios importantes y a tomar acciones correctivas antes de que ocurran fallos catastróficos.

El webinario cubre:

• Procedimientos de prueba
• Voltajes de prueba vs. Tensión nominal
• Corrección por temperatura
• Evaluación y análisis de tendencias de los resultados

Este webinario es útil para bobinadores, mecánicos, supervisores y técnicos de pruebas.

Gene Vogel
EASA Pump & Vibration Specialist

The repair of roto-dynamic pumps (pumps with centrifugal and axial flow impellers) requires that, as much as possible, the mechanical condition of the pump be returned to factory specifications. This presentation focusses on critical close fit tolerances and certain surface finish specifications. The best recommendation is always that factory tolerances be used. However, when those factory tolerances are simply not available and the pump must be repaired, service centers rely on general rules of thumb and experience to complete repairs. 

The following concerns will be reviewed: 

• Rolling element bearings
• Sleeve bearings (horizontal)
• VTP bearings
• Impeller-casing wear rings
• Casing rabbets
• VTP motor mounting flange runout and P-flange type motor bases
• Throttle (throat) bushings
• Impeller-shaft fit
• Stage bushings

This summary of data, collected from various service centers, pump manufacturers, parts manufacturers and engineering resources, assembled in one resource, will be helpful to pump repair technicians, supervisors and engineers.

This presentation covers:

• Brief overview of disassembly and evidence of failure
• Discussion of possible failure scenarios
• Review of actual repairs, modification and reassembly
• Update of machine's present operation

Presented by Gene Vogel
EASA Pump & Vibration Specialist

The EASA Pump Reliability Seminar is a two-day program that describes in detail the factors related to pump reliability. This webinar introduces participants to those factors and how they come together to ensure a reliably operating pump. Not everyone needs to be a pump expert, but they should know the essentials of reliability to recognize when more expertise is needed.

• Pump reliability factors
• Pump applications
• Pump failure modes

This top-level view will be useful to service center managers, sales personnel, engineers and technicians who encounter pumps in the scope of their work.

A special discounted collection of 8 webinar recordings focusing on various aspects of pump repair.

Once purchased, all 8 recordings will be available on your "Downloadable products purchased" page in your online account.

Downloadable recordings in this bundle include:

Troubleshooting Pump Performance Problems
Presented May 2017

This presentation covers:

• Not enough pressure (head) or not enough flow – how do you respond?
• How to determine if a pump is operating properly
• Differentiating a pump problem from a system problem
• Determining pump load and power requirements
• The effect of fluid parameters and cavitation on pump performance. 

Target audience: This will be most useful for service center technicians and engineers. The content will also be beneficial for supervisors and managers who are responsible for pump failure analysis and testing. 

Pump Failure Case Study
Presented December 2013

This presentation covers:

• Brief overview of disassembly and evidence of failure
• Discussion of possible failure scenarios
• Review of actual repairs, modification and reassembly
• Update of machine's present operation

Repair Tips for Submersible Pumps
Presented February 2013

This presentation focuses on:

• Types of submersible pumps
• Tips on seal arrangements
• Common repair procedures
• Cables and cable entries
• Testing submersibles in the service center

Assessing Impeller Damage
Presented May 2019

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. Topics covered include:

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

Repairing Impeller Damage
Presented May 2016

We’ve covered how to assess impeller damage. Now learn how to fix that damage. This presentation covers: 

• Replacing/repairing wear rings
• Repairing cavitation damage
• Impeller replacement options
• Dynamic balancing impellers

Techniques for Straightening Pump Shafts
Presented March 2011

The slender dimensions of many pump shafts make them susceptible to distortion, which affects pump performance and reliability. This recording presents a methodical approach and effective techniques for measuring and correcting shafts which are bent or twisted.

Target audience: This presentation is intended for service center supervisors, managers and machine shop technicians.

Vertical Turbine Pump Repair Tips
Presented February 2012

Vertical turbine pumps are used extensively in every segment of industry. Although they are not complex, repairing them in the service center can present a few challenges. This presentation gives some approaches and procedures that experience has shown will make the job easier.

Final Testing for Pumps - An Overview
Presented November 2014

The pump repairs are completed! Now the pump needs to be tested. This presentation discusses 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.

This presentation focuses on:

• A review of seal basics
• Seal materials for primary and secondary seals
• How to determine spring tension values
• How to calculate PV values
• Seal flush plans

This three-part series focuses on the pump selection process.

• Part 1 - Pump System Basics
  Whether for a new pump application or for a pump replacement, it is important to understand the full range of expected operating conditions, and the system parameters dictated by those conditions. The machine mounting method, its vertical location relative to the liquid level, and environmental conditions must also be considered. This presentation addresses those concerns and introduces the process of properly selecting a pump for a particular application.
• Part 2 - Pump System Concerns
  When requesting a proposal for a new or replacement pump, a customer may provide you with specific pumping parameters, such as required head, flow and NPSH – or not. It is helpful when specifying a pump, to understand the system parameters that determine those required pumping parameters. This presentation will go over the basics of determining system parameters for pump applications.
• Part 3 - Series and Parallel Pumps
  There are many guidelines for designing multiple pumps for a single system. The most basic concern is to understand the requirements when multiple pumps are arranged in series and/or in parallel. Also, the design of systems has been become more flexible with the availability of variable speed drives, which are often applied in multiple pump installations. This presentation addresses those concerns and sheds some light on issues that result from misapplication.

A special discounted collection of 7 webinar recordings focusing on pump design thoery and how to determine is a pump is appropriate for an application.

Once purchased, all 7 recordings will be available on your "Downloadable products purchased" page in your online account.

Downloadable recordings in this bundle include:

Quick Pump Curves: How to Read Them
Presented July 2011

This presentation takes the mystery out of pump curves and provides viewers with the necessary knowledge to determine pump operating points, efficiency and horsepower. The exclusive parameters that determine if a pump is likely to cavitate are also discussed.

Target audience: This presentation is intended for application engineers, sales personnel, managers and interested pump technicians and supervisors.

The Basics: What Every Repairer Needs to Know About Pump Curves
Presented August 2016

This presentation covers:

• Head & flow = volts & amps for pumps
• Testing pumps to their performance curves
• Troubleshooting pump performance
• What the pump curve tells you about cavitation 

The Basics: What You Should Know About Pump Cavitation
Presented December 2016

This presentation covers: 

• What is classic pump cavitation?
• The NPSHA – NPSHR relationship
• How to identify the evidence of cavitation
• Other types of cavitation

Using Variable-Speed Drives to Improve Pump System Efficiency
Presented May 2018

This presentation discusses:

• Potential savings for pump operations
• How service centers can profit
• Identifying system benefits

Target audience: This webinar will benefit service center technicians and supervisors.

Pump Seals — Advanced
Presented February 2012

This presentation focuses on:

• A review of seal basics
• Seal materials for primary and secondary seals
• How to determine spring tension values
• How to calculate PV values
• Seal flush plans

Vertical Turbine Pump Shaft Journal Bearing Material, Types and Clearances
Presented December 2017

The rules of thumb often applied to journal bearings in horizontal machines don’t apply to vertical machines. Vertical turbine pumps are a common example. This presentation explains the characteristics of bearings in these pumps and provide examples of manufacturers specifications. In addition, specialty bearing materials will be discussed in regard to applications, specifications and installation.

Target audience: This webinar is most useful for service center technicians and engineers. The content is beneficial for supervisors and managers who are responsible for pump failure analysis and testing.

Vertical Turbine Pump Shaft and Bearing Types, Fits and Clearance
Presented November 2018

This presentation covers:

• Shaft material and specs
• Shaft coupling types
• Machining for shafts
• Bronze, plastic, graphite and cutlass bearing options
• Bearing clearance concerns and reference data 
• Bearing housing fits

Target audience: This webinar will benefit service center technicians and supervisors.

This presentation takes the mystery out of pump curves and provides viewers with the necessary knowledge to determine pump operating points, efficiency and horsepower. The exclusive parameters that determine if a pump is likely to cavitate are also discussed.

Target audience: This presentation is intended for application engineers, sales personnel, managers and interested pump technicians and supervisors.

Reclosure occurs when power to a motor is briefly interrupted and restored before the magnetic field has fully collapsed in the motor’s winding. If this occurs while the applied power is out of phase with the collapsing field, significant damage can result. This webinar will address how this can happen and what measures can mitigate damage potential.

Topics covered include:

• Reclosing a switch or breaker before the magnetic field collapses
• Utilities’ automatic reclosure
• Contactor “chatter”
• Determining the time constraint
• Remedies: Time delay; Zero crossing

Disclaimer: All video captions and translations are AI-generated.
EASA is not responsible for any inaccuracies that may occur.

Presented by members of EASA's Ad Hoc Committee on Emerging Technologies
January 11, 2023

This discussion highlights EASA’s overview guide on remote condition monitoring and answers questions from members on the booklet and, and remote condition monitoring in general. Items covered include:

• Maintenance philosophies
• Business models
• Software/data platform
• Hardware selection

There are certain repair processes, such as winding removal and replacement, that can impact the efficiency and reliability of electric motors. Prudent repair practices must not increase overall losses, and preferably should maintain or reduce them.

This presentation explains how those repair processes affect efficiency and reliability, and gives the best repair practices in order to maintain or improve efficiency.

Target audience: This presentation is most useful for service center inside and outside sales representatives, customer service personnel, engineers, supervisors and managers. The content will be beneficial for beginners through highly experienced persons.

This presentation focuses on:

• Types of submersible pumps
• Tips on seal arrangements
• Common repair procedures
• Cables and cable entries
• Testing submersibles in the service center

We’ve covered how to assess impeller damage in a previous presentation. Now learn how to fix that damage. This presentation covers: 

• Replacing/repairing wear rings
• Repairing cavitation damage
• Impeller replacement options
• Dynamic balancing impellers

This presentation covers:

• Who can perform repairs on hazardous location motors?
• What does it take to be certified?
• UL Files: Manufacturer and Rebuild Class, division, group and zone
• Temperature codes CSA, IECEx, FM and other third parties

Target audience: This will benefit service center management for firms that are interested in learning more about servicing hazardous location motors.