Conference Proceeding

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

Grupo de Electron. Aplicada, Univ. Nacional de Rio Cuarto, Cordoba, Argentina;
07/2003; ISBN: 0-7803-7912-8 pp.234- 239 vol. 1 In proceeding of: Industrial Electronics, 2003. ISIE '03. 2003 IEEE International Symposium on, Volume: 1
Source: IEEE Xplore

ABSTRACT 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.

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Keywords

additional excitation
 
air-gap eccentricity
 
circuit model
 
fundamental excitation
 
induction motor
 
induction motor drives
 
machine saliencies effects
 
mixed eccentricity diagnosis
 
multiple
 
position estimation strategy
 
rotor position
 
static
 
strategy obtains information
 
zero sequence voltage