by Howard Penrose, Ph.D., CMRP | May 1, 2021 | Electrical Reliability, Motors & Drives
Following publication of Mar. 21, 2021, article about the application of high-voltage testing on electric motors, at least one commenter noted that the referenced IEEE Standard 1415-2006 was administratively withdrawn on Mar. 25, 2021. A primary concern seems have...
by Howard Penrose, Ph.D., CMRP | Mar 21, 2021 | Electrical Reliability, Motors & Drives
Last week’s article (March, 13, 2021), “Evaluation Of Medium And High Voltage Machines with Motor Circuit Analysis (MCA)” sparked quite a bit of interest. That included substantial on- and off-line discussion about low- and high-voltage testing. Based on articles and...
by Howard Penrose, Ph.D., CMRP | Mar 13, 2021 | Electrical Reliability, Motors & Drives
Low- and high-voltage Motor Circuit Analysis (MCA) methods have existed since the 1950s, with low-voltage MCA technology becoming commercially viable in the 1980s. Since the mid-1980s, MCA technologies have become more prevalent as part of predictive-maintenance (PdM)...
by Howard Penrose, Ph.D., CMRP | Mar 7, 2021 | Electrical Reliability, Motors & Drives
in this week’s article, we wrap up our short series of discussions around the first of the three parts (“Volumes”) of the 2021 “U.S. Industrial and Commercial Motor System Market Assessment Report.” In doing so, we need to consider...
by Howard Penrose, Ph.D., CMRP | Feb 27, 2021 | Electrical Reliability, Motors & Drives
As noted in Part I of this article series (Feb. 14, 2021, see link below), the purpose of the “U.S. Industrial and Commercial Motor System Market Assessment Report” is to provide information on the current state of electric motor-driven systems in United States...
by Howard Penrose, Ph.D., CMRP | Feb 14, 2021 | Electrical Reliability, Motors & Drives
In 2016, a project was launched by the U.S. Department of Energy (USDOE) through Lawrence Berkeley National Labs to re-perform the original industrial and commercial motor-system opportunities reports from 1996. At the beginning of the study, there was a...
by Heinz Bloch, P.E., Editor | Jan 30, 2021 | Motors & Drives, RAM Tools & Methods, The Bloch Files
Reliability specialists are encouraged to make good use of industry standards. Well-written standards improve equipment uniformity and quality. Take, for example, standards from the National Electrical Manufacturers Association (NEMA). Their foreword explains scope...
by Howard Penrose, Ph.D., CMRP | Jan 23, 2021 | Electrical Reliability, Motors & Drives
In Part of this series (Jan. 16, 2020, link below), we discussed a few basics of supervised machine-learning (ML) systems, including typical steps to the development of an ML solution. In this second installment, we take a brief look at the types of algorithms used in...
by Howard Penrose, Ph.D., CMRP | Jan 16, 2021 | Electrical Reliability, Motors & Drives
We’ve heard the terms “Machine Learning (ML)” and “Artificial Intelligence (AI)” a lot over the past few years. Even the term “Neural Networks” has entered into the marketing language of the moment. The concepts behind these terms...
by Howard Penrose, Ph.D., CMRP | Jan 9, 2021 | Electrical Reliability, Motors & Drives
In this article, we use Electrical Signature Analysis (ESA) to evaluate a drive-end bearing in a 1210 rpm, 1.5 MW, 690 Vac wind-turbine generator. The problematic 6330M bearing was found during routine analysis of a wind-power site. One of the challenges of projecting...
