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.
- Noah Bethel
- PdMA Corporation
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.
- Mark Koch
- ALL-TEST Pro, LLC
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..
- Noah Bethel
- PdMA Corporation
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....
- Noah Bethel
- PdMA Corporation
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...
- Mark Koch
- ALL-TEST Pro, LLC
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...
- Noah Bethel
- PdMA Corporation
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...
- Don Donofrio
- The Snell Group
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...
- Noah Bethel
- PdMA Corporation
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...
- Mark Koch
- ALL-TEST Pro, LLC