Application of statistical signal processing for condition monitoring of rotor faults in induction motor

The paper presents the research and development effort in finding a reliable and economical rotor fault condition monitoring system using an ordinary 486 PC together with a readily obtained inexpensive 14 bit AD converter. The work presented in this paper focuses mainly on the no-load data so as to avoid the effect of cyclic variation of the load pattern upon the current signature obtained via current transformers which are readily available in large machines. Results obtained from laboratory sized 2.2 kW cage induction motors are also presented