Motor Testing
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
Rotor Evaluation Using MCEMAX® – The 5th Harmonic
Six independent methods of rotor evaluation can be used from the MCEMAX technology to analyze the condition of a squirrel cage AC induction motor...
- Noah Bethel
- PdMA Corporation
Large Electric Motor Reliability: What Did the Studies Really Say?
One of the most frequently quoted studies related to electric motor reliability is a 1983 Electric Power Research Institute (EPRI) project performed by General Electric...
- Howard Penrose
- MotorDoc LLC
Performing a Demodulation of the Current Signal – Rotor Evaluation
Previously hidden in the noise platform of the current spectrum, now peaks related to belts, gears, fans and other machine train components can be easily identified and band alarmed...
- Noah Bethel
- PdMA Corporation
What is the Rotor Influence Check (RIC)?
Six independent methods of rotor evaluation can be used from the MCEMAX technology to analyze the condition of a squirrel cage AC induction motor...
- Noah Bethel
- PdMA Corporation
Deep Below the Earth’s Surface In A South African Platinum Mine
The motor is used to lower the water table in a Platinum Mine in South Africa. If the motor fails, the water table would rise and end production...
- Noah Bethel
- PdMA Corporation
Applications for Motor Current Signature Analysis
The fundamental purpose behind the original development of MCSA technology was the detection of rotor bar faults. Rotor bars are difficult to assess using traditional test methods, including vibration analysis...
- Howard Penrose
- MotorDoc LLC
Wound Rotor Motor Fault
Wound rotor motors, theoretically they are the same as far as induction. The access to the motor is significantly increased with round rotor motors and it allows an interesting trouble shooting approach.
- Noah Bethel
- PdMA Corporation