Motor Testing
Calculating Eccentricity Frequencies
Eccentricity Frequencies, as related to electric motors, simply means that the rotor is not radially or axially centered in the stator magnetic field. This instructional video demonstrates how to calculate these frequencies..
- Don Donofrio
- The Snell Group
The Trifecta of Motor Maintenance
Using the same concept of a trifecta (three factors for success), this article provides companies with the winning strategies of motor maintenance, focusing on the three reliability tasks for electric motor testing and the order in which they should be applied.
- Noah Bethel
- PdMA Corporation
Polarization Index Profiles
A polarization index is a 10-minute timed insulation test using a megohmmeter to measure resistance to ground. If you plot or graph the results incrementally, it will give you a profile of the resistance to ground. There are five distinct patterns that we'll get...
- Don Donofrio
- The Snell Group
Calculating Field Pole Pass Frequency
Field Pole Pass Frequency Sidebands (Fpp) are a primary method of identifying rotor anomalies. This instructional video demonstrates how to calculate these frequencies....
- Don Donofrio
- The Snell Group
Electric Motor Reliability Trifecta – Quality Control Part 3
Trifecta is picking the top three finishers in a horse race, and it can be worth a lot of money. Applying the trifecta theme to motor reliability, the top three applications of test technology to ensure you win big in reliability are Quality Control, Trending, and Troubleshooting…
- Noah Bethel
- PdMA Corporation
Thermal Convection
Many electric motors use thermal convection to keep the motor cool. The greater the surface area of contact, the greater heat transfer ability.......
- Bill Kruger
- ALL-TEST Pro
Electric Motor Reliability Trifecta: Quality Control (Part 2)
“Ready” spare motors are critical to ensure minimum loss of production in the event of an unplanned failure. Warehouse spares must be maintained and tested to ensure they...
- Noah Bethel
- PdMA Corporation
Electrical Signature Analysis Performed on Vertical Turbine Pump Motors in Municipal Application
Originally put into operation in 1999, Pump Station P-19A supplies drinking water to the City of Henderson, which is the second largest city in Nevada. In January 2015, Motor 5 exhibited signs of overheating...
- Bill Kruger
- ALL-TEST Pro
Electric Motor Reliability Trifecta: Quality Control (Part 1)
Trifecta refers to picking the top three finishers in a horse race, and it can be worth a lot of money. Applying that to motor reliability, what are the top three applications of test technology to ensure you win big in reliability? In this tip we will be exploring quality control...
- Noah Bethel
- PdMA Corporation