Tip of the Week

Change The Frequency – Change The Range

When testing de-energized synchronous or DC motor field poles with the PdMA MCE® remember that different sized field coils with different numbers of turns have very different inductance values. Although…

Servo Motor Troubleshooting

Robotics powered by servo motors are in every aspect of manufacturing from the automotive to pharmaceutical industry. Although it is important to acquire a baseline and acceptance test for Fault…

Test Your Knowledge – Part 3

This will be the final question in this Test Your Knowledge series for motor reliability. Scroll to the end to see the correct answer. On the Power Results page, Voltage…

Test Your Knowledge – Part 2

For the next few weeks we will post a motor reliability question for you to test your knowledge. Scroll to the end to see the correct answer. Over a series…

Test Your Knowledge – Part 1

For the next few weeks we will post a motor reliability question for you to test your knowledge. Scroll to the end to see the correct answer. Per IEEE Standard…

No Current Imbalance Doesn’t Mean No Problem

Just because the three phase current data being returned by the installed relay is balanced, doesn’t clear the power circuit of possible anomalies. Remember from previous tips that the opposition…
High Resistance

Out With The Old In With The New!

PdMA Corporation is proud to announce the release of their new updated website. PdMA has always maintained a strong commitment to bringing you the latest technical information through Case Studies, White…

EASA AR-100 Changes That Affect You – Part 2

Part 2 (Resistance Unbalance Tolerances) Another very good change to the AR-100 is the addition of resistance unbalance limits for random and form wound coils. For over thirty years PdMA…

EASA AR-100 Changes That Affect You – Part 1

Part 1 (Minimum Insulation Resistance) A very good and practical change to the AR-100 is the minimum insulation resistance for DC armatures being lowered to 5Mohms. Yes, 5 Mohms! In…
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