EPE Association: EPE 2001 - Topic 06h: Design and Diagnoses

EPE 2001 - Topic 06h: Design and Diagnoses
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2001 - Conference > EPE 2001 - Topic 06: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 2001 - Topic 06h: Design and Diagnoses

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   Diagnosis by Parameter Estimation of Stator and Rotor Faults
By S. Bachir; S. Tnani; J. C. Trigeassou; G. Champenois [View]
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Abstract: The authors propose a new diagnosis method for simultaneous stator and rotor faults in induction motors. This method is based on parameter estimation of the new Park’s model, developed to take into account inter turn short-circuits of stator windings and broken rotor bars. A diagnosis procedure has been validated on real faulty experiments.

   Failure analysis of a drive system with transverse flux machine
By R. Jager; G. Dupain; S.W.H. de Haan [View]
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Abstract: As part of a design procedure for an electrical drive system with a transverse flux machine (TFM) a failure mode and effects analysis (FMEA) has been carried out. The purpose of the analysis is to identify the hazardous effect of certain failures and to develop methods to prevent hazardous effects. The analysis shows that all failure modes of the drive system can be prevented. Two preventive measures, for an over voltage at the terminals of the machine and an overcurrent in the inverter, are simulated using a non-linear model of the machine. The parameters for the model have been obtained from measurement of an available TFM. The model has been verified with an experimental drive system with TFM The simulation shows that the machine is protected against the failure modes.

   Influence of Load Torque on the Detection of Rotor Asymmetries in Squi
By C. Kral; F. Pirker; G. Pascoli [View]
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Abstract: The aim of this contribution is the investigation of the influence of load torque on rotor fault specific eﬀects. An asymmetric rotor cage causes sideband currents and shaft torque modulations which depend on the actual load state. In general, these are well known phenomenas. While their frequencies moves with the actual slip, amplitudes and phase angles show non linear dependencies. These dependencies will be investigated and analyzed. Simulation and measurement results are presented. This paper deals with the Vienna Monitoring Method (VMM), too. The VMM is based on the comparison of calculated torque values which are obtained from two diﬀerent mathematical machine models. The impact of load torque on the VMM will be investigated.

   Rotor cage fault diag. in 3-phase IM, under pres. time-varying loads
By S. M. A. Cruz; A. J. Marques Cardoso [View]
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Abstract: This paper deals with the use of the synchronous reference frame current Park’s Vector Approach in the diagnosis of rotor cage faults in three-phase induction motors, under the presence of time-varying loads. An analytical study, based on the d-q model of the induction motor is presented, showing how the occurrence of abrupt changes in the motor load torque affect quantities like the d-q axis components and the spectrum of the motor supply current, among others, emphasizing its implications in the diagnosis of rotor faults in operating three-phase induction motors. Several simulated and experimental results have shown that the current spectral components produced by the occurrence of rotor faults can easily be indistinguishable from the ones introduced by time-varying loads. On the other hand, the synchronous reference frame current Park’s Vector representation allow us to dissociate the effects produced by the presence of rotor faults from the ones originated by the mechanical load of the motor, thus allowing the diagnosis of rotor faults in a motor coupled to any kind of mechanical load.

EPE 2001 - Topic 06h: Design and Diagnoses
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2001 - Conference > EPE 2001 - Topic 06: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 2001 - Topic 06h: Design and Diagnoses
	[return to parent folder]

	Diagnosis by Parameter Estimation of Stator and Rotor Faults By S. Bachir; S. Tnani; J. C. Trigeassou; G. Champenois	[View] [Download]
Abstract: The authors propose a new diagnosis method for simultaneous stator and rotor faults in induction motors. This method is based on parameter estimation of the new Park’s model, developed to take into account inter turn short-circuits of stator windings and broken rotor bars. A diagnosis procedure has been validated on real faulty experiments.

	Failure analysis of a drive system with transverse flux machine By R. Jager; G. Dupain; S.W.H. de Haan	[View] [Download]
Abstract: As part of a design procedure for an electrical drive system with a transverse flux machine (TFM) a failure mode and effects analysis (FMEA) has been carried out. The purpose of the analysis is to identify the hazardous effect of certain failures and to develop methods to prevent hazardous effects. The analysis shows that all failure modes of the drive system can be prevented. Two preventive measures, for an over voltage at the terminals of the machine and an overcurrent in the inverter, are simulated using a non-linear model of the machine. The parameters for the model have been obtained from measurement of an available TFM. The model has been verified with an experimental drive system with TFM The simulation shows that the machine is protected against the failure modes.

	Influence of Load Torque on the Detection of Rotor Asymmetries in Squi By C. Kral; F. Pirker; G. Pascoli	[View] [Download]
Abstract: The aim of this contribution is the investigation of the influence of load torque on rotor fault specific eﬀects. An asymmetric rotor cage causes sideband currents and shaft torque modulations which depend on the actual load state. In general, these are well known phenomenas. While their frequencies moves with the actual slip, amplitudes and phase angles show non linear dependencies. These dependencies will be investigated and analyzed. Simulation and measurement results are presented. This paper deals with the Vienna Monitoring Method (VMM), too. The VMM is based on the comparison of calculated torque values which are obtained from two diﬀerent mathematical machine models. The impact of load torque on the VMM will be investigated.

	Rotor cage fault diag. in 3-phase IM, under pres. time-varying loads By S. M. A. Cruz; A. J. Marques Cardoso	[View] [Download]
Abstract: This paper deals with the use of the synchronous reference frame current Park’s Vector Approach in the diagnosis of rotor cage faults in three-phase induction motors, under the presence of time-varying loads. An analytical study, based on the d-q model of the induction motor is presented, showing how the occurrence of abrupt changes in the motor load torque affect quantities like the d-q axis components and the spectrum of the motor supply current, among others, emphasizing its implications in the diagnosis of rotor faults in operating three-phase induction motors. Several simulated and experimental results have shown that the current spectral components produced by the occurrence of rotor faults can easily be indistinguishable from the ones introduced by time-varying loads. On the other hand, the synchronous reference frame current Park’s Vector representation allow us to dissociate the effects produced by the presence of rotor faults from the ones originated by the mechanical load of the motor, thus allowing the diagnosis of rotor faults in a motor coupled to any kind of mechanical load.