Electric Motor Repair for Low Voltage Induction Motors in PWM Inverter Duty Environments
I still find it amazing that people are coming out with the same thing that we came out with in the 1990s when PWM drives made their dramatic push into industry – and presenting it all as somehow ‘new.’ In any case, here is another IEEE Electrical Insulation Conference paper published in 1997 from research…
The Mechanical Effects from Thermal Stripping Induction Motor Stators
Back in 1997 Leo Dreisilker, the president of Dreisilker Electric Motors, and I, while I was at a small engineering firm doing what we now call digital twin and machine learning, performed a study on the mechanical impacts of different stator materials when exposed to burnoff ovens. This was published in the 1997 at the…
Static Motor Circuit Analysis: An Introduction to Theory and Application
Presented in the July/August 2000 IEEE Electrical Insulation Magazine. Basic concepts on how technologies such as the ALL-TEST Pro offline systems work. Yep, I still use one.
Anatomy of an Energy Efficient Electric Motor Rewind
An IEEE article published in the IEEE Electrical Insulation Magazine January/February 1997 during the period where we were developing US Department of Energy motor management programs (Motor Challenge). The information is as true today as it was in 1997.
Evaluation of the Impact of Harmonics on Electric Machine Reliability
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
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
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…
Impact of Electrical Reliability and Precision Maintenance Programs on Energy and Environment in Commercial and Industrial Facilities
What is the impact of an electrical reliability program? Or even the application of a precision maintenance program Overall, the transition to a planned maintenance program from a reactive program has been identified by the US Department of Energy (US DOE) Industrial Assessment Centers (IAC) as having at least 14% improvement of all energy consumption…