Format of Original
Institute of Electrical and Electronics Engineers (IEEE)
IEEE Transactions on Industry Applications
A fault indicator, the so-called swing angle, for broken-bar and interturn faults is investigated in this paper. This fault indicator is based on the rotating magnetic-field pendulous-oscillation concept in faulty squirrel-cage induction motors. Using the "swing-angle indicator," it will be demonstrated here that an interturn fault can be detected even in the presence of machine manufacturing imperfections. Meanwhile, a broken-bar fault can be detected under both direct-line and PWM excitations, even under the more difficult condition of partial-load levels. These two conditions of partial load and motor manufacturing imperfections, which are considered as difficult situations for fault detection, are investigated through experimentally obtained test results for a set of 2- and 5-hp induction motors.
Mirafzal, Behrooz and Demerdash, Nabeel, "On Innovative Methods of Induction Motor Interturn and Broken-bar Fault Diagnostics" (2006). Electrical and Computer Engineering Faculty Research and Publications. 195.
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