In this paper we present three case studies using online and offline motor analysis to prevent catastrophic motor failures. The online and offline analysis in our case studies use a battery of standard electrical tests including Current Signature Analysis (CSA) and Demodulated Current Spectrum Analysis (DCSA).
Over the past 20 years, Current Signature Analysis (CSA) has become an established tool for online fault analysis of AC Induction motors. Presently, very little research has been performed using current signature analysis on DC motors. This paper is a brief introduction to online fault diagnosis of DC motors using current signature analysis.