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, linking the amplitude of the novel spectral components induced by the injected signal to the fault entity, avoiding the dumping action of the regulator. In this paper the signal injection technique for rotor bar breakage diagnosis and stator short circuit detection is investigated and compared with the classical MCSA procedures. Simple machine models are presented that allow to state relationships between the fault entity and the amplitude of specific spectrum lines in stator current or current space vector. Experiments and theoretical analysis show that for broken bars this technique has some advantages with respect to MCSA. On the contrary in case of stator short circuits the signal injection techniques is not suitable for diagnostic purposes, being the specific line amplitude only partially affected by the fault.

Induction Drives Diagnosis by Signal Injection: Effectiveness and Severity Classification / Bellini, A; Concari, Carlo; Franceschini, Giovanni; Lorenzani, E; Tassoni, Carla. - 1:(2005), pp. 718-727. (Intervento presentato al convegno IEEE IEMDC 2005 tenutosi a San Antonio, TX, USA nel 15-18 May 2005).

Induction Drives Diagnosis by Signal Injection: Effectiveness and Severity Classification

CONCARI, Carlo;FRANCESCHINI, Giovanni;TASSONI, Carla
2005-01-01

Abstract

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, linking the amplitude of the novel spectral components induced by the injected signal to the fault entity, avoiding the dumping action of the regulator. In this paper the signal injection technique for rotor bar breakage diagnosis and stator short circuit detection is investigated and compared with the classical MCSA procedures. Simple machine models are presented that allow to state relationships between the fault entity and the amplitude of specific spectrum lines in stator current or current space vector. Experiments and theoretical analysis show that for broken bars this technique has some advantages with respect to MCSA. On the contrary in case of stator short circuits the signal injection techniques is not suitable for diagnostic purposes, being the specific line amplitude only partially affected by the fault.
2005
9780780389878
Induction Drives Diagnosis by Signal Injection: Effectiveness and Severity Classification / Bellini, A; Concari, Carlo; Franceschini, Giovanni; Lorenzani, E; Tassoni, Carla. - 1:(2005), pp. 718-727. (Intervento presentato al convegno IEEE IEMDC 2005 tenutosi a San Antonio, TX, USA nel 15-18 May 2005).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/1509631
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