Multi-variable monitoring systems for on-line monitoring of induction motors allow larger versatility and robustness. In case of rotor faults, the diagnostic procedure based on sideband current components may fail for the presence of inter-bar currents that reduce the amplitudes of these components. On the other hand the inter-bar currents modify the core vibration; therefore the analysis of both line currents and core vibration signals may increase the effectiveness of the diagnostic procedure. In this paper the features of stator currents and core vibration signals are investigated in order to achieve an accurate and reliable diagnostic system. Moreover stray flux signals are considered to explore the possibility of obtaining further information. ©2006 IEEE.

Vibrations, currents and stray flux signals to asses induction motors rotor conditions / Alberto, Bellini; Concari, C.; Franceschini, G.; Tassoni, C.; Toscani, A.. - (2006), pp. 4963-4968. ((Intervento presentato al convegno IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics tenutosi a Paris, fra nel November 2006 [10.1109/IECON.2006.347365].

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