Estimating motor life using motor circuit analysis predictive measurements. Part II

For pt.I see ibid., p.451-4 (2003). In the first paper (Penrose, et al., 2003), the keys to the implementation of a technology for predictive maintenance and reliability and the ability to estimate how much time is left prior to equipment failure was outlined. The first part of the study was to establish a baseline for electric motor life time estimation using motor circuit analysis techniques was presented. In the second part of the study, variations of operating conditions including environment, load, cycling, and others were evaluated to fine-tune the estimation. The focus of the study is low voltage, random wound machines in a variety of environments. Additional studies are in progress for medium voltage rotating machinery.