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In this paper different procedures are validated to diagnose and assess the severity degree of rotor faults in closed loop controlled induction machines. The possible diagnostic indexes are investigated through spectral analysis of manipulated and controlled variables. Common control schemes have been considered to evaluate the diagnostic robustness towards operating condition and regulator parameters...
The "signal injection technique" introduced to realize speed sensorless induction drive exploiting rotor asymmetry effects, is an attractive procedure for diagnostic purposes as well. At first it was proposed as alternative technique to detect rotor damage, then its use has been extended to stator short circuit detection. An important issue is the possibility to state the fault severity,...
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