Two Minute Tips
Stator Inter-Turn Stress with Electrical Signature Analysis in Variable Frequency Drive Applications
Incorrect settings in a Variable Frequency Drive (VFD) application have an impact on the windings of an electric motor. When a drive is not set correctly, or not tuned when not using straight volts/hertz settings, stresses occur between the turns in a winding. In some cases, this will appear as small Partial Discharges (PD), and in others it can be increased leakage between turns. When these conditions occur, they introduce small current discharges that effect the air gap magnetic field of the motor.
- Howard Penrose
- MotorDoc LLC
Best Kept Secret in Bearing Uptime
Vari-Purpose Lubricant is cool-running, long-lasting, and water-resistant. It dramatically lengthens grease intervals, eliminates bearing failures, can extend bearing life by up to threefold, and does not harden with age.
- John Sander
- Lubrication Engineers
The Evolution of Wireless Monitoring
Wireless monitoring has changed a lot over the past decades, and it continues to improve. David Howard explains…
- Dr. M. David Howard
- Erbessd Instruments
Xport Ultra Lubricator for Remote Grease Lines
The Xport® Ultra automatic single point lubricator is an extremely versatile and capable lubrication system suited to a wide range of applications that demand high lubrication rates and where long remote grease lines are necessary to ensure safe access. It operates fully automatically, independent of temperature, and offers a precise discharge.
- John Sander
- Lubrication Engineers
Beginner’s Guide To Motor Testing
Motors when installed play a critical role in many manufacturing efforts. Businesses in all industries rely on machines to drive profits, so testing these motors ensures your investments are available for demanding tasks.
- Mark Koch
- ALL-TEST Pro, LLC
Vibration Tracking – The Looking Glass Technique – See the Invisible
Incredible as it may seem, the vibration (or at least a large part of it) can be detected through video recording with incredible resolution. Saving a huge number of hours in studies that before were time consuming if not impossible to do. All of this using Vibration Tracking.
So, what is the Vibration Tracking? And better yet, what is it for?
- Dr. Thierry Erbessd
- Erbessd Instruments
Safety in Thermal Imaging
Across the world the approach to safety is quite varied, and one can easily become complacent if you do not take a wider view of it. In many forums, regardless of the engineering discipline or matter of social interest, there will be varying views about what is acceptable in terms of safety or what should be common knowledge.
- PJ Cloete
- AVT Reliability
What Is Machine Vibration?
Everyone agrees that vibration data provides information about the condition of the machine and the operation of the equipment, but what exactly is machine vibration? We can say it is an oscillation wherein the…
- Ron Newman
- PRUFTECHNIK
How To Check Motor Winding Resistance On Single & Three-Phase Motors
Motor Circuit Analysis™ (MCA™) is a test method that determines the true state of health of 3 phase & single-phase electrical motors. MCA™ checks the motors coils, rotor, connections, and more. MCA™ can verify ac motor winding resistance as well as dc motor resistance and determine state of health.
- Mark Koch
- ALL-TEST Pro, LLC