EASA's private webinars
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:
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:
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