Technical Articles

Supplier:

PdMA Corporation


PdMA Corporation has published these technical articles:

(Test and Measurement Equipment)
From this Article:
When testing AC motors that are being powered by VFDs technicians should keep in mind the Volt/Hz ratio and its relationship to a motor's speed.... (View Full Article)
(Calibration and Testing Services)
From this Article:
The ever present emphasis on technological efficiency is just one of several forces behind the pressure on companies to "go green" despite a trying economy. Yet green investments, particularly as they... (View Full Article)
(Calibration and Testing Services)
From this Article:
Does motor efficiency relate to "going green"? While the term going green originally applied to the release of greenhouse gases, it has been broadened to include waste and inefficiency associated with... (View Full Article)
(Calibration and Testing Services)
From this Article:
As one of the most critical factors in reducing manufacturing costs, motor reliability has to be taken very seriously if a company wants to increase its return on investment in motor assets. Keeping... (View Full Article)
(Calibration and Testing Services)
From this Article:
During normal operation of a three-phase AC induction motor, the magnetic flux in a healthy rotor forms a sinusoidal pattern. Typically, in healthy rotors, little residual flux will remain after the... (View Full Article)
(Calibration and Testing Services)
From this Article:
As industries continue to look for new methods of identifying and predicting equipment failures, manufacturers of predictive maintenance equipment are developing new tools to add to their arsenal of... (View Full Article)
From this Article:
A boiler feed pump being powered by two 3500 HP induction motors appears to be developing a problem. Failure of this pump will result in the loss of a generator currently producing half the station's... (View Full Article)
(Calibration and Testing Services)
From this Article:
Condition assessment of DC motors requires a basic understanding of the design and operating characteristics of the various types available: the series motor, the shunt motor, and the compound motor.... (View Full Article)
(Calibration and Testing Services)
From this Article:
Eastman Chemical Company started its Motor Analysis Program in late 1998 when we purchased an online power analyzer. After several months of testing, we found the analyzer to be limited for... (View Full Article)
(Calibration and Testing Services)
From this Article:
Electrical maintenance personnel have for years been limited to troubleshooting with no more than a fluke and a Megger. This unfortunately does not provide enough information to allow most... (View Full Article)
(Calibration and Testing Services)
From this Article:
Static motor testing is a well-known means to comprehensively test electric motors. However, if a motor cannot be shutdown even the best static equipment becomes ineffective. Situations like these... (View Full Article)
(Calibration and Testing Services)
From this Article:
It's late on a Friday afternoon. You just got an email from your boss' boss that he's impressed with the predictive maintenance program you have implemented at the plant. Yes, by combining the... (View Full Article)
(Calibration and Testing Services)
From this Article:
Over the last 20 years, Current Signature Analysis (CSA) has become an established tool for online fault analysis of AC Induction motors. Presently, very little research has been performed using... (View Full Article)
From this Article:
At first glance, the device merely looks like a silver briefcase with a laptop computer that's taken out into the field by Upgrading's maintenance crews. But the MCE/Emax (motor circuit evaluator)... (View Full Article)
(Calibration and Testing Services)
From this Article:
How often have you been in a situation where you have to determine whether a rotor problem exists and the only indication you have is rotor bar pass frequency and a gut feeling. Squirrel cage... (View Full Article)
(Calibration and Testing Services)
From this Article:
VFD Technology has changed the way most of us do business in one way or another. If you have not been influenced in some way by this new technology, then stand by, your time is coming. We have all... (View Full Article)
From this Article:
Using a combination of online and offline tests to form a six fault zone approach offers a more complete analysis of motor health.... (View Full Article)