Practical Electrical and Current Signature Analysis of Electrical and Mechanical Systems Forward
A reading of the new book on Electrical and Current Signature Analysis by MotorDoc LLC which is planned for release in the second half of October, 2022.
US Industrial and Commercial Motor System Market Assessment Volume 3 Released by US DOE
Volume 3 of the US Department of Energy’s “US industrial and Commercial Motor System Market Assessment” was released on July, 2022. The study reviews the energy performance improvement opportunities for the installed base of commercial and industrial motor systems in the United States. It is noted in the report that electric motors and related systems…
Tech Tip All We Need to Do is Lubricate an Electric Motor Right?
Media bias is not only found related to politics and public policy, but also how we perceive the reliability and maintenance community. From advertising dollars and marketing being presented as technical articles and information to the idea that ‘digital transformation’ solves everything, or that infrared is a complete electrical reliability program. As noted in my…
Reliability Engineering, Data Science, Machine Learning and Bias
When dealing with statistical analysis and probabilities its often the missing information that can be an issue. This can result in bias when working in areas such as reliability, data science and machine learning that result in incorrect solutions. We’ve seen that in such things as the percentage of type of motor failures, faulty IoT…
Energy Savings through the Application of Neutral Harmonic Filter: A Case Study
It is established that neutral and ground harmonic content will load transformers and systems. Prior work has been limited as to the direct relationship of this additional loading on power consumption for a facility. Over the past 24 months applied research has been performed on the measured impact of neutral and ground harmonics and energy…
Voltage Unbalance and Motor Temperature
A common question we receive is: ‘what is the impact of voltage unbalance on temperature?’ With incoming power to facilities having challenges in many parts of the United States (and elsewhere) from aging grid and the rapid application of power electronics, this becomes a significant issue. Voltage unbalance is the variation from the average voltage…
Concepts in Reliability Keeping it Simple and Random Thoughts
As I just mentioned to a friend – I seem to be waxing philosophical this past weekend as I complete reading “Wizard: The Life and Times of Nikola Tesla, Biography of a Genius,” by Marc J Seifer. I would not have tripped over this and several other excellent texts had I not started returning to…
Code for TheRamReview.com Part VII Electric Motor Raw Data Machine Learning
Following is the code used to develop the script bringing the details developed in Parts I-VI together for classification and RUL/TTFE outputs in the Part VII article: (article to be posted by September 19, 2021. *Note: The code in this article is for demonstration purposes only and is not meant for real-world applications of this…
TheRamReview.com Machine Learning Article Part III Addendum – the code
For trying out the method described Mathworks (https://mathworks.com) provides 30 day trials of their personal and business versions of the Matlab and Simulink systems. The *.csv files created for this article series were developed within Matlab (Figure 2) using the code which follows. *Note: The code in this article is for demonstration purposes only and…
Evaluating Missing Wedges and Coil Movement with ESA IEEE Paper
Two significant issues in wind power asynchronous generators are magnetic wedge loss and coil movement resulting in winding faults. Most of the time the failures occur unexpectedly or require borescope or visual inspections of the generator stators. In this paper we will identify how both conditions can be detected during operation through Electrical Signature Analysis. …