Motor Testing
The Application of Modern Medium Voltage Variable Frequency Drives
Pumps, fans, and compressors account for over 60% of loads in industrial and processing industries, while medium voltage motors over 200 horsepower account for 1% of the motor population and 45% of electric motor energy consumption...
- Howard Penrose
- MotorDoc LLC
Special Application Motors: DC Motor
There are three types of DC motors: Series, Shunt, and Compound. They are similar in the components they have, but dissimilar in the way the field coils are connected...
- Noah Bethel
- PdMA Corporation
Special Application Motors: Wound Motor Rotors
Many industrial applications require three-phase motors to operate at variable speeds...
- Noah Bethel
- PdMA Corporation
Forensic Analysis of Electric Machines
A tremendous amount of time, productivity and production can be lost using improper troubleshooting and evaluation techniques...
- Howard Penrose
- MotorDoc LLC
What Are Motor Greasing Best Practices?
In this interview, Clay discusses the steps involved in creating a structure and following the best practices for motor greasing...
- Clay Allen
- Mosaic
The Importance Behind The Addition of Annex D In IEEE Standard 43-2013
The standards working group behind the present edition of IEEE Std 43 made significant changes in the overall standard, including modifications to temperature normalization to 40°C. This was done to accommodate the many changes and observations in insulation chemistry and combinations over the past decades...
- Howard Penrose
- MotorDoc LLC
Rotor Evaluation Using MCEMAX®: In/Rush-Start/Up
The start-up of a motor is a stressful event. High current, rapid temperature rise and mechanical stress all create a perfect environment to evaluate the health of your rotor and expose any hidden anomalies...
- Noah Bethel
- PdMA Corporation
Rotor Evaluation Using MCEMAX®: Pole-Pass Frequency (Fp)
Rotor bars on the rotor of a squirrel cage induction motor act as a shorting mechanism to the magnetic flux emitted from the steel rotor laminations...
- Noah Bethel
- PdMA Corporation
Rotor Evaluation Using MCEMAX® – Fp Frequency
Pole-pass frequency (Fp) sideband evaluation is one of the more established methods of rotor evaluation utilizing the current signature analysis test...
- Noah Bethel
- PdMA Corporation