ANSI/EASA AR100-2020 cover

ANSI/EASA Standard AR100-2020
ANSI/EASA AR100-2020: Recommended Practice for the Repair of Rotating Electrical Apparatus is a must-have guide to the repair of rotating electrical machines. It establishes recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.

Questions?

For information about ANSI/EASA AR100 or questions about the work on this standard, contact:

Mike Howell, PE
EASA Technical Support Specialist
+1 314 993 2220
mhowell@easa.com

ANSI Accredited Standards Developer Information

Air Gap: What Is It, What Does It Do, and Why Is It Important?

October 2019
Number of views: 29514
Article rating: 4.4

Presented by Chuck Yung
EASA Senior Technical Support Specialist

The physical air gap between the rotor or armature and the stator or field frame is complex and plays a critical role in the performance of AC and DC machines. Most repairers do not realize how little they understand about this subject.

This webinar will explain the role air gap plays in AC motor performance, how to recognize the symptoms of an uneven air gap, and share corrective measures. For DC machines, this webinar will cover the distinctly different role of the field air gap as opposed to the air gap of the interpoles.

Air gap tolerance of AC machines
Air gap tolerance of DC fields and interpoles
Allowable runout of rotor / armature
Recognizing the signs of air gap anomalies
Corrective actions

Target audience
This webinar recording is of benefit to managers, supervisors, winders, mechanics and field service personnel.

AVAILABLE AS PART OF A DISCOUNTED BUNDLE BUY A COPY

ANSI/EASA AR100

More information on this topic can be found in ANSI/EASA AR100

Section 2: Mechanical repair
Section 4: Testing

EASA Technical Manual

More information on this topic can be found in EASA's Technical Manual

Section 2: AC Machines
Section 3: DC Machines
Section 7: Electrical Testing

Related Reference and Training Materials

Principles of Medium & Large AC Motors (NEMA Standards)

Section 4: Safety & Handling Considerations
Section 8: Squirrel Cage Rotors
Section 10: Bearings & Lubrication
Section 12: Test & Inspection Procedures
Section 13: Motor Alignment, Vibration & Noise

Principles of Medium & Large AC Motors (IEC Standards)

Section 4: Safety & Handling Considerations
Section 8: Squirrel Cage Rotors
Section 10: Bearings & Lubrication
Section 12: Test & Inspection Procedures
Section 13: Motor Alignment, Vibration & Noise

Root Cause Failure Analysis

Section 2: Bearing Failures
Section 3: Stator Failures
Section 4: Shaft Failures
Section 5: Rotor Failures
Section 6: Mechanical Failures
Section 7: DC Motor Failures

Fundamentals of DC Motors & Operation Tips

Section 2: DC Motor Theory
Section 5: Armatures
Section 10: On-Site Troubleshooting

Mechanical Repair Fundamentals of Electric Motors

Section 8: Rotors
Section 9: Motor Assembly
Section 11: Motor Dynamics
Section 12: Vibration & Motor Geometry
Section 13: Shaft/Bearing Currents

Categories: AC motors, Rotors, Stators/windings, Design/theory/application, Webinar recordings

Tags: Motor design Air gap

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The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.

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EASA Good Practice Guide

Good Practice Guide to Maintain Motor Efficiency
Based on the 2019 and 2003 Rewind Studies of premium efficiency, energy efficient, IE2 (formerly EF1) and IE3 motors

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