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.

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.

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

• Tips for interpreting armature and interpole tests
• Finding that ground in the newly rewound armature
• 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.

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

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 presentation will benefit supervisors, managers, sales personnel, machinists and mechanics.

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.

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

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

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
This seminar 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.

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.

Presentado por Carlos Ramirez, EASA Technical Support Specialist

La conexión incorrecta de los motores eléctricos es una causa frecuente de fallo y es más común de lo que parece. La falta de información y la mala interpretación de los datos de placa son algunas de sus causas. En este webinario se explican los diferentes tipos de conexiones para los motores eléctricos trifásicos de una o varias velocidades con al menos 6 cables de salida y se comparan las equivalencias NEMA e IEC para el marcado de cables. La información proporcionada también será de gran utilidad para evitar el conexionado incorrecto en los diferentes voltajes. También incluye las conexiones por devanado partido (Part Winding) y como interpretar la información de la conexión de la placa de datos.

El webinar incluye:

• Conexiones Estrella y Delta (“Triángulo”)
• Conexiones para motores de una sola velocidad con al menos 6 cables de salida
• Conexiones para motores de dos velocidades con al menos 6 cables de salida
• Conexiones para Devanado Partido (Part winding)
• Equivalencias NEMA e IEC para el marcado de cables  
• Interpretación de la información de la conexión de la placa de datos

Este webinario es útil para supervisores, personal encargado de realizar pruebas y responsables del centro de servicio.

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.

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.

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.

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

This webinar 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.

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.

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.

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.

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

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.

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

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

This webinar covers:

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

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.

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.

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 session will discuss ways to get the most benefit from the lubricant by choosing the proper oil or grease and properly maintaining the equipment. Critical to this process are compatibility, relubrication quantity and frequency, and avoiding contamination.

Who should attend
This seminar will be 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 relubrication for the best effect.

This session 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.

This session 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.

Cavitation is one of the most damaging forces to centrifugal pumps. Understanding the causes, symptoms and solutions for cavitation is essential to service technicians and engineers. This webinar will "bring you up to speed" on cavitation in centrifugal pumps.

This webinar will focus on:

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

This webinar will take the mystery out of pump curves and provide attendees with the necessary knowledge to determine pump operating points, efficiency and horsepower. The elusive parameters that determine if a pump is likely to cavitate will also be discussed.

Who should attend
This seminar 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 session will address how this can happen and what measures can mitigate damage potential. It will 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

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 session will explain how those repair processes affect efficiency and reliability; and presents the best repair practices in order to maintain or improve efficiency.

This webinar focuses on submersible pumps:

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

The subject of the repair option in the repair/replace decision process has been dealt with frequently. However, the topic of what to do when the decision is to replace is rarely if ever addressed. This session is intended to help fill that void.

The main topics to be covered include:

• Selecting the right motor for the application
• Dealing with usual and unusual electrical and mechanical conditions
• Preventing problems by recognizing the cause(s) of the original motor failure
• Adding value by providing additional features and offering services to increase the reliability of the replacement motor

Who should attend
This seminar will be most useful for service center inside and outside sales representatives, customer service personnel, and managers. The content will be beneficial for beginners through highly experienced persons.

We’ve covered how to assess impeller damage in a previous webinar. Now learn how to fix that damage. This webinar will cover: 

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

Premium efficient motors and inverter-fed motors have a couple of things in common: more iron for lower flux densities and more copper for lower copper densities. This webinar will outline tips for successfully rewinding premium efficient motors without compromising their efficiency, and for rewinding inverter-fed motors so they will last. This session is most helpful for those with a hands-on background in motor winding.

Root Cause Methodoloy is a step-by-step method for examining a failed motor and its system. It focuses on the stresses that acted upon the failed component. By better understanding these stresses, the service center is more likely to uncover the root cause of failure.

This webinar will examine the five key steps of root cause methodology:

• Failure mode
• Failure pattern
• Appearance
• Application
• Maintenance history

The webinar will also discuss the "5 Whys?", summarize motor stresses, and stress the importance of total system analysis (not just motor).

Who should attend
This seminar will be most useful for service center and field technicians, service center managers, engineers, and users maintenance personnel desiring to understand the techniques for determining root cause of failures and implement remedies to improve reliability.

Determining whether or not a squirrel cage rotor is defective is an issue that is a challenge to every service center as there is often no simple way to determine the integrity of a rotor. The primary focus of this session will be to describe many of the available tests that can be utilized in the service center or at the motor installation site. In addition to conventional squirrel cage rotor testing methods such as the growler test, techniques that will also be covered are the use of a core loss tester, high current excitation, and spectrum analysis of vibration.

Who should attend
This webinar will be most useful for service center and field technicians with at least 2 years experience, service center supervisors and managers, engineers, or anyone with previous experience dealing with suspected open rotor issues.

Most service center technicians and managers know the general properties of a few common grades of steel used for motor and pump shafts. This webinar will expand that knowledge by defining the important parameters of a range of steel grades and how they affect performance. The affects of thermal treating and basic metallurgical terminology will also be presented.

Who should attend
This webinar is intended for service center supervisors, managers and machine shop technicians.

"Water finds a way." The quote may be anonymous but that is the reality for anyone working with submersible pumps. Sometimes neglected, the cable entry point can be a source of moisture entrainment that leads to damp windings and ground failures. This webinar will address this important link in sealing submersible pumps.

This webinar will stress the importance of taking accurate winding data and explain and emphasize the consequences of inaccurate data. Details will be provided on how to take accurate electrical and mechanical data; and how to verify that the data is correct. One of the main benefits of this webinar will be an improved ability to “get it right the first time” so as to avoid the added cost and time of another rewind to correct errors.

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.

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

Who should attend
This webinar is intended for service center supervisors, managers and machine shop technicians.

This webinar will examine:

• How the spectrum is generated from the vibration signal
• The effect of f-max and resolution settings
• Averaging techniques
• Scaling and demodulation

This webinar shares 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.

Who should attend
This webinar will be useful to supervisors, machinists, mechanics, winders, and sales personnel who interact with the end user.

This webinar will explore 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.

Who should attend
Individuals responsible for performing mechanical inspections of fits, familiar with general electric motor assemblies.

Unusual winding connections can create real headaches if they aren’t correctly identified when the data is taken. And the time required to “get it right the second time” comes directly off your bottom line.

This webinar will cover:

• equalized connections
• odd grouping
• interleaved and interspersed windings
• part-salient, part-consequent connections

This session will look at various configurations of vertical motor thrust bearing arrangements. We will also discuss 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 will also be examined.

Who should attend
This webinar will be 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.

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 webinar will present some approaches and procedures that experience has shown will make the job easier.

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 webinar will explain the characteristics of bearing in these pumps and provide examples of manufacturers specifications. In addition, specialty bearing materials will be discussed in regard to applications, specifications and installation.

Who should attend
This webinar will be most useful for service center technicians and engineers. The content will be beneficial for supervisors and managers who are responsible for pump failure analysis and testing.

This one-hour webinar will examine:

• Identifying belt vibration
• Identifying pulley pitch line run-out vibration
• Other vibration sources
• ODS analysis

When motors are installed on top of vertical pumps, high vibration is a common problem. The problem may be mechanical, hydraulic or structural. This webinar will provide an understanding of the nature of this style pump and the various forces essential to diagnosing and correcting vibration problems on vertical pump motors.

This webinar session will address the topic of a various temperature sensing devices including RTD’s, thermostats, thermocouples and thermistors. The advantages of each and the proper application will be covered.

Who should attend
This webinar will be most useful for service center sales personnel, engineers, supervisors and managers. The content will be beneficial for moderate through highly experienced persons.