2S1: Case Study: Combined Use of ESA/MCSA and Vibration for Accurate Time To Failure Estimation

Howard Penrose, President, MotorDoc LLC


The combined use of mechanical vibration analysis and electrical/current signature analysis provide a greater dimension of fault detection and confirmation within an electric machine.  In this presentation will will discuss the vibration and ESA fault detection of rotor bar faults in three medium voltage compressor motors and how the combined use allowed the risk of catestrophic failure to be assessed.  The use of both technologies reduced fault detection and analysis to minutes versus the weeks of troubleshooting leading up to the combined use.


Howard W Penrose, Ph.D., CMRP is the president of MotorDoc LLC, Web-Editor-in-Chief for the IEEE Dielectrics and Electrical Insulation Society, and Vice Chair of the Society for Maintenance and Reliability Professionals (SMRP). He is a Certified Maintenance and Reliability Professional (CMRP), vibration analyst, electrical signature analyst, infrared analyst as well as multiple other technologies. He received 5 UAW-GM People Make Quality Happen Awards from 2005-2009 and awards for his books on electrical motor diagnostics and physical asset management. He is a past Senior Research Engineer for the University of Illinois’ (UIC) Energy Resources Center and past adjunct professor of industrial engineering and industrial safety at UIC. Dr. Penrose has been involved in electrical machine technologies from design to repair and applications to forensics on systems from nuclear power to steel, LVAD heart pumps to NASA wind tunnels, and hybrid vehicles (passenger and heavy equipment hybrid machine design / GM until 2009 and John Deere including assember training through the present) to wind turbines. His company, MotorDoc LLC, is responsible for electric machine condition for the largest chiller plant in North America (National Institutes of Health, Bethesda, MD) as well as similar projects globally. Presently, in one of his roles on the board of SMRP, he serves as the Chair of Government Affairs and advises Homeland Security, NIST and policymakers as part of standing committees related to cybersecurity and cyberphysical systems related to physical asset management. He is a member of IEEE, SMRP, Vibration Institute, AIST, AWEA and MENSA as well as a UAW Local 1981 author and publisher. In his spare time he is the Managing Partner in a major powerlifting gym near Chicago and a world-class powerlifting competitor, World referee and trainer with numerous world, national and state records, including Team USA World Champion for the World Powerlifting Congress (2012-2016).