Motor Testing

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Two Minute Tips
  • Motor Testing

Troubleshooting the Rotor and Air Gap on a De-energized Motor

Today we look at troubleshooting techniques and considerations on a de-energized motor for the rotor and air gap fault zones. One of the measurements taken during the five-minute MCE® standard test is inductance, and with the three phases of inductance, inductive imbalance is calculated.

Case Studies and Stories
  • Motor Testing

Successful PdM Saves Facility Time & Money

A work order was issued by a waste water treatment plant technician requesting electrical support due to a failed floating agitator.

Two Minute Tips
  • Motor Testing

Troubleshooting a De-energized Motor

In this tip we look at troubleshooting techniques and considerations when a motor is not running (de-energized), requiring controlled test signals to be sent into the motor..

Two Minute Tips
  • Motor Testing

Troubleshooting a Running Motor

This tip discusses troubleshooting the motor and machine train with the motor still running. The fault zones specific to the physical motor are the stator, rotor and airgap....

Two Minute Tips
  • Motor Testing

Static Eccentricity Faults Using Electrical Signature Analysis

Static Eccentricity (air gap) is a fault that is created when the rotor is not in the magnetic center of the stator. Static eccentricity can cause an increase in operating current, overheating, energy losses, and overloading of bearings...

Two Minute Tips
  • Motor Testing

Delaying End of Life

Everything, including motors, has an end of life. Our reliability goal is to identify conditions conducive to failure and correct them so the end of life doesn’t come early...

Five Minute Facts
  • Motor Testing

PI Testing “The Fire Hose Analogy”

A Polarization Index is affected by multiple current components that occur simultaneously. This instructional presentation provides a simple analogy to make this complex test easier to understand...

Two Minute Tips
  • Motor Testing

Electric Motor Reliability Trifecta – Training Cont’d

Keeping the focus on Trending, in Trending Part 1 we discussed qualitative trending and focused on the change in appearance. This week we switch from qualitative to quantitative trending...

Two Minute Tips
  • Motor Testing

Stator Mechanical Faults Using Electrical Signature Analysis (ESA)

A stator mechanical fault is created when the stator core becomes loose within the motor frame, or if the windings are loose between the stator slots. A loose stator core or winding over a period of time will cause...

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