Application of an additional excitation in inverter-fed induction motors for air-gap eccentricity diagnosis

The application of an additional excitation in induction motor drives for static, dynamic and mixed eccentricity diagnosis is proposed. The additional excitation consists of a predetermined inverter-switching pattern applied while the fundamental excitation is cancelled. This excitation has been pre...

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Bibliographic Details
Main Authors: Bossio, G.R., De Angelo, C.H., Solsona, J.A., Garcia, G.O., Valla, M.I.
Format: Conference Proceeding
Language:English
Subjects:
Air gaps
Circuit faults
Coupling circuits
Fault diagnosis
Induction motors
Proposals
Rotors
Senior members
Stators
Voltage
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Description
Summary:The application of an additional excitation in induction motor drives for static, dynamic and mixed eccentricity diagnosis is proposed. The additional excitation consists of a predetermined inverter-switching pattern applied while the fundamental excitation is cancelled. This excitation has been previously used to implement a position estimation strategy. This strategy obtains information about the rotor position from the machine saliencies effects over the zero sequence voltage. The air-gap eccentricity is a saliency that depends on the rotor position. For such reason, it also produces changes over the zero sequence voltage. In order to evaluate the feasibility of this proposal, a multiple coupled circuit model of the induction motor is used. Experimental results that validate the proposal are also presented.
DOI:10.1109/ISIE.2003.1267251