Accelerated Aging Procedure and Online Method for Stator Insulation Monitoring of Induction Motors

Online methods for stator insulation monitoring have been investigated with increasing interest in the last 15 years. These rely on high-frequency behavior of electric machine. In converter-fed machines, is visible through current ringings occurring during switching commutations power electronics. As lifetime machines can several decades, a faster way to evaluate accelerated aging tests. This work aims perform an procedure induction motor test online method. The has randomly-wound winding and it aged by means thermal cycles without need oven. A custom converter employed apply record ringings. proposed method based metric that quantifies ringing variations simple manner, following quasi-linear variation parasitic capacitances aging.