Uncategorized – MotorDoc LLC

IEEE Paper The Application of Electrical and Current Signature Analysis for DFIG Turbine and Powertrain Defects

February 4, 2025hpenrose@motordocllc.comElectrical and Current Signature Analysis, Electrical Reliability, EMPATH, EMPOWER, Energy, Environment, IIoT, Insulation Systems, Motor Diagnostics, Motor Theory, Reliability, Time To Failure Estimation TTFE, Uncategorized, Wind PowerECMS-1, EMPATH, Energy, Environment, ESA, IoT, Machine Learning, MCSA, MotorDocLLC

Abstract—Electrical and current signature analysis (ESA/MCSA) techniques provide a valuable method for detecting defects in wind turbine generators, particularly in doubly-fed induction generator (DFIG) systems. This paper explores the application of ESA/MCSA in identifying defects such as wye-ring fractures, bearing wear, and gearbox faults. We discuss the data acquisition process, spectral analysis methodologies, and case…

Evaluating Wind Turbines With Electrical Signature Analysis

November 17, 2024hpenrose@motordocllc.comElectrical and Current Signature Analysis, Electrical Reliability, EMPATH, EMPOWER, Energy, Environment, IIoT, Motor Diagnostics, Motor Management, Motor Repair, Physical Asset Management, Reliability, Smart Grid, Time To Failure Estimation TTFE, Uncategorized, Wind PowerECMS-1, EMPATH, Energy, Environment, ESA, IoT, MCSA, MotorDocLLC

Electrical Signature Analysis (ESA) is the method of using the electric machine magnetic field as the transducer as measured through voltage and current. The method was originally developed by Oak Ridge National Labs in the late 1980s for the expressed purpose of fault detection of gear and bearing wear in driven equipment in addition to…

Evaluation of the Impact of Harmonics on Electric Machine Reliability

May 14, 2023hpenrose@motordocllc.comElectrical Reliability, EMPATH, Energy, IIoT, Insulation Systems, Motor Diagnostics, Motor Management, Motor Repair, Motor Theory, Physical Asset Management, Reliability, Uncategorized, Variable Frequency DriveECMS-1, EMPATH, Energy, Environment, ESA, IoT, MCSA, MotorDocLLC

Power, magnetic and ground harmonics have a negative impact on the reliability of your electric motors both electrically and mechanically. We often focus just on the power harmonics when reviewing information on power quality, but rarely view the self-generated electric machine harmonics and the harmonic content present in grounds and neutrals. Over the past several…

Stator Core Loss and Hot Spot Testing: An Overview

May 7, 2023hpenrose@motordocllc.comElectrical Reliability, Energy, Infrared, Insulation Systems, Management, Motor Diagnostics, Motor Management, Motor Repair, Motor Theory, Physical Asset Management, Reliability, UncategorizedEnergy, Environment, MotorDocLLC

What is the importance and differences between core loss testing and hot spot testing in electric machines through the repair process? How are they performed and what results do they provide? In this short article we will discuss the basics of core and hot spot testing and their impact on electric machine reliability. This white…

Electrical and Current Signature Analysis in Standards a 2022 update

December 3, 2022hpenrose@motordocllc.comElectrical and Current Signature Analysis, Electrical Reliability, EMPATH, Reliability, Transformer, Uncategorized, Wind PowerECMS-1, EMPATH, Energy, ESA, matlab, MCSA, MotorDocLLC

On December 1, 2022 I received my usual daily IEEE standards updates for voting which included IEEE P1017.4/D1, “Draft Recommended Practice for Testing and Rating of Electrical Submersible Polyphase Induction Motors.” This would be the complete new draft of such a standard developed by the Petroleum and Chemical Industry Committees of the IEEE Industry Applications…

Update Energy Savings through the Application of Neutral Harmonic Filter: A Case Study

October 2, 2022hpenrose@motordocllc.comElectrical and Current Signature Analysis, Electrical Reliability, EMPATH, Energy, Environment, IIoT, Reliability, Smart Grid, UncategorizedECMS-1, EMPATH, Energy, Environment, ESA, MCSA, MotorDocLLC

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…

Practical Electrical and Current Signature Analysis of Electrical and Mechanical Systems Forward

September 18, 2022hpenrose@motordocllc.comArchive, Electrical and Current Signature Analysis, Electrical Reliability, EMPATH, Energy, Environment, Hybrid and Electric Vehicles, IIoT, Motor Diagnostics, Reliability, Time To Failure Estimation TTFE, Transformer, Uncategorized, Variable Frequency Drive, Vibration, Wind Power

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

September 16, 2022hpenrose@motordocllc.comArchive, Electrical Reliability, Motor Management, Reliability, Uncategorized

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?

September 4, 2022hpenrose@motordocllc.comArchive, Electrical and Current Signature Analysis, Electrical Reliability, EMPATH, Energy, Environment, Insulation Systems, Management, Motor Diagnostics, Motor Management, Reliability, Uncategorized, US DOE, Variable Frequency Drive

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…

Energy Savings through the Application of Neutral Harmonic Filter: A Case Study

August 20, 2022hpenrose@motordocllc.comArchive, Electrical and Current Signature Analysis, Electrical Reliability, EMPATH, Energy, Environment, Reliability, Smart Grid, Transformer, Uncategorized, Variable Frequency Drive