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…
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…
Following is the code used to create the voltage, current and power factor defect for the article which can be found here: Part V: Machine Learning (ML) With Raw Electric Motor Data | THE RAM REVIEW *Note: The code in this article is for demonstration purposes only and is not meant for real-world applications of…
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…
A new inline ventilation motor operating on a VFD with bypass tripped on startup with the VFD and instantaneously tripped when tested across the line. Smoke was noted in the drive cabinet and MotorDoc was contacted to evaluate the electric motor and work with the VFD installer following recommendations by repair shops to remove the…
Initial testing of an ID fan performed in 2018 with corrections made and retesting performed with EMPATH analysis, GTI Predictive vibration analysis and RDI motion amplification. While values were not extreme in the pre-test, the resulting vibration destroyed fan bearings and other poor conditions which prevented the operation of the fan system. Testing was performed…
Free Live Seminar for April 17, 2020 from noon to 1pm CST In this presentation we will work step-by-step how to analyze an electric motor, sheaves, belts and fan including related bearings using real field data. The demonstration will be with the EMPATH system but applies to other current and electrical signature analysis. GoToWebinar to…
Howard W Penrose, Ph.D., CMRP MotorDoc LLC, www.motordoc.com The term MCA (Motor Circuit Analysis) is derived from a test method that provides information on the basic components of an alternate-current (AC) or direct-current (DC) electric motor. These basic components include: resistance, measured in Ohms; impedance, measured in Ohms; inductance, measured in Henries; the induction winding…
