Motor Testing
Leading and Lagging Indicators
Leading indicators are those that occur early in the P-F curve while lagging indicators occur later in the failure cycle. Both are key indicators, but it is important to know which one you are dealing with to better diagnose the severity of the situation..
- Noah Bethel
- PdMA Corporation
Gaps in Your Electric Motor Reliability Program
Businesses invest millions of dollars in what they believe will be a fail-safe maintenance program for their electric motors. Regular tests are scheduled for each motor; engineers dutifully record the data when required and then move on to the next motor.
- Noah Bethel
- PdMA Corporation
Space Heaters
Depending on the environment and criticality of your electric motor, space heaters should be strongly considered if you want to ensure maximum reliability and expected motor life.
- Noah Bethel
- PdMA Corporation
Motor Storage
Proper motor storage is critical if we hope to achieve normal life expectancy from our electric motors. Not only is proper motor storage important for good motor health, it may be required to maintain a warranty on motors that we purchase..
- Noah Bethel
- PdMA Corporation
Motor Magnetic Center
Running a motor uncoupled will pull the motor rotor into a magnetic center, often marked on the shaft to ensure that the rotor is lined up on the magnetic center when it is coupled to the load. .
- Noah Bethel
- PdMA Corporation
Keeping Track of Starts
Heat is often the final variable causing pre-mature aging and breakdown of your insulation system. Another component of your electric motor, overlooked for heat related failure is the rotor.
- Noah Bethel
- PdMA Corporation
Motor Base Installation Procedure
Adjustable motor bases and rails are available in a variety of sizes that accommodate most motors. These bases are an easy and great solution as they simplify installation and offer adjustments for alignment and tensioning..
- Mike Olszewski
- Reliability Concepts
You Have Water Where?
For many of us it’s the rainy season and with that comes elevated concerns about the insulation integrity of our electric motors and generators. .
- Noah Bethel
- PdMA Corporation
Rotor Bar Analysis Using Electrical Signature Analysis
Broken or fractured rotor bars are found as elevated Pole Pass Frequency (PPF) sidebands of line fre- quency (LF). PPF is calculated using the synchronous speed minus the running speed times the number of poles..
- Mark Koch
- ALL-TEST Pro, LLC