A new parameters identification technique for induction machine diagnosis

A new parameters identification method for induction machine electrical faults detection is presented in this paper. Typical evolutive faults like: phase resistance increase caused by poor contacts, turn-to-turn shortcircuits, unbalanced supply voltages, magnetic circuit ageing and squirrel-cage bar rupture, are taken into consideration. A triphase abc frame it wc, taken into consideration for real phase parameters identification. In order to provide the electrical parameters, an identification technique based on currents, voltages and speed acquisition during transients (e.g. starting-up) has been developed on a portable acquisition and post-processing system. The system can be successfully applied for both periodical preventive maintenance and electrical parameters verification of repaired induction machines.