On-field experience with online diagnosis of large induction motors cage failures using MCSA

Bellini, A.; Filippetti, F.; Franceschini, G.; Tassoni, C.; Passaglia, R.; Saottini, M.; Tontini, G.; Giovannini, M.; Rossi, A. P.

doi:10.1109/tia.2002.800591

Cited by 165 publications

(75 citation statements)

References 7 publications

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“…A well known limitation of squirrel cage induction machines --the strength and integrity of the endring to bar joint [1][2][3][4] --has presented an upper bound to their design speed range, often resulting in the selection of switched reluctance or permanent magnet synchronous machines for the highest speed applications.…”

Section: Introductionmentioning

confidence: 99%

Advanced Induction Motor Endring Design Features for High Speed Applications

Caprio¹,

Lelos²,

Herbst³

et al. 2005

IEEE International Conference on Electric Machines and Drives, 2005.

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-This paper presents advancements in induction motor endring design to overcome mechanical limitations and extend the operating speed range and joint reliability of induction machines.A novel end ring design met the challenging mechanical requirements of this high speed, high temperature, power dense application, without compromising electrical performance. Analysis is presented of the advanced endring design features including a non uniform cross section, hoop stress relief cuts, and an integrated joint boss, which reduced critical stress concentrations, allowing operation under a broad speed and temperature design range. A generalized treatment of this design approach is presented comparing the concept results to conventional design techniques. Additionally, a low temperature joining process of the bar/end ring connection is discussed that provides the required joint strength without compromising the mechanical strength of the age hardened parent metals. A description of a prototype 2 MW, 15,000 rpm flywheel motor generator embodying this technology is presented.

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Section: Introductionmentioning

confidence: 99%

Advanced Induction Motor Endring Design Features for High Speed Applications

Caprio¹,

Lelos²,

Herbst³

et al. 2005

IEEE International Conference on Electric Machines and Drives, 2005.

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“…It has been also reported that, at certain slip values, some types of load (gearboxes [5]), motors with special characteristics ('spidered' rotor structures that have the same number of legs and poles [6]), or rotor asymmetries (rotor ellipticity, misalignment of the shaft with the cage or magnetic anisotropy [7]), can show up at the same frequency components of broken bars, triggering false alarms. So, instead of relying on a single slip value, [5] proposes a "two-…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of Induction Motor Faults via Gabor Analysis of the Current in Transient Regime

Riera-Guasp

Pineda-Sánchez

Pérez-Cruz

et al. 2012

IEEE Trans. Instrum. Meas.

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IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS. But a fine tuning of their parameters is needed in order to obtain a high resolution image of the fault in the time-frequency domain, and they also require a much higher processing effort than traditional diagnosis techniques, such as the Fourier Transform (FT). The new method proposed in this paper addresses both problems using the Gabor analysis of the current via the chirp z-transform (CZT), which can be easily adapted to generate high resolution time-frequency stamps of different types of faults. In this paper, it is used to diagnose broken bars of an IM using the current during a startup transient. This new approach is theoretically introduced and experimentally validated with a 1.1 kW commercial motor in faulty and healthy conditions.

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“…Those works (WILLIAMSON; SMITH, 1982;KLIMAN et al, 1988;THOM-SON, 1992;BELLINI et al, 2002;THOMSON;FENGER, 2003) still showed that a broken bar results in current components being induced in the stator winding at frequencies given by: fsb = f1(1±2s)Hz (1) Where: fsb = frequencies of sidebands due to broken rotor bars, Hz; f1 = supply frequency, Hz; s = per unit slip of the induction motor.…”

Section: Introductionmentioning

confidence: 99%

<strong>Analysis of broken rotor bars in large induction motors</strong><br> DOI: 10.5585/exacta.v4i2.775

Dias¹,

Chabu²

2008

Exacta

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A new technique to detect broken rotor bars, in large squirrelcage induction motors is presented. In order to avoid problems in industrial applications, the electromagnetic behavior of induction machines with rotor faults was examined, by using a mathematical model. Simulation results are presented from the model implemented in the Simulink-Matlab. Experimental results are presented in order to validate the proposed method.

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On-field experience with online diagnosis of large induction motors cage failures using MCSA

Cited by 165 publications

References 7 publications

Advanced Induction Motor Endring Design Features for High Speed Applications

Advanced Induction Motor Endring Design Features for High Speed Applications

Diagnosis of Induction Motor Faults via Gabor Analysis of the Current in Transient Regime

<strong>Analysis of broken rotor bars in large induction motors</strong><br> DOI: 10.5585/exacta.v4i2.775

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