Motor Testing
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
Can the Cloud Protect You From Cyber Intrusion?
In Part II of this series, CBM CONNECT dives deeper into Cyber Intrusion with Howard. Is it safer to rely on Cloud services to store your data? If companies like Yahoo and Equifax are getting hacked, how can you protect yourself?
- Howard Penrose
- MotorDoc LLC
Rotor Casting Voids
Casting voids do exist, however it wasn't until the late 1980's when we started to notice these with new technology...
- Howard Penrose
- MotorDoc LLC
In-Rush Start-Up Current Test Prevents Catastrophic Pump Failure
The nameplate information for the 2B circulating water pump showed 4,000 V, 3,000 HP, 409 FLA, and 355 rpm. It had 240 slots and 196 bars. While this is not normal information to include on the nameplate, especially on older motors, it is good information for the specialist to have...
Electric Motor Fault
In this article we are going to take a look at a fault on an electric motor and then attempt to explain why the vibration changed in the way that it did...
- Jason Tranter
- Mobius Institute