Off-Line and On-Line Motor Electrical Monitoring and Condition Analysis: Payoffsand Problems

摘要

This paper provides insight into and describes motor electrical conditionmonitoring and analysis methods in use for decades and provides a comparison with state of the art methods developed and introduced in the 1990's. Nine methods for condition monitoring of motors are described. In particular, the technology generically called 'motor circuit analysis' available from an increasing number of commercial sources (and now used in many different countries) is compared in a balanced manner to three other off-line and five on-line test methods. Five techniques for analysis of motor electrical data from the nine technology methods are tabulated for comparison. A sixth, very powerful analysis technique is discussed. Advantages and disadvantages of off-line and on-line methods are tabulated and tied to specific technologies where applicable. One case history involving two methods from a commercial activity is presented to illustrate a problem and a payoff. The difficulty of gaining acceptance of standards developed to support the analysis using newly introduced technologies is described. The status of industry consortiums established to set standards for new and refurbished motor purchases and for ensuring easy integration of data from any predictive technology used for monitoring of any machinery is briefly discussed.