Evaluation of the Influence of Rotor Magnetic Anisotropy on Condition Monitoring of Two-Pole Induction Motors

Shin, Sung-Sik; Kim, Jongwan; Lee, Sang Bin; Lim, Chaewoong; Wiedenbrug, E.

doi:10.1109/tia.2015.2391432

Cited by 33 publications

(11 citation statements)

References 21 publications

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“…Nonetheless, in past works, it was proven that the two previous evidences were not enough to confirm the presence of rotor failures in cage induction motors; this was due to the fact that there are some situations where other harmonics that are not related to the fault can be misinterpreted as fault components; these situations can lead to false positive indications [7][8][9][10][14][15]. In other cases, although the fault is present, the amplitudes of the previous components may be low or they may not be easily assessable, a fact that can lead to eventual false negative indications [8,11,13].…”

Section: Integral Methods Based On Current Analysismentioning

confidence: 99%

“…motor startup current) has been proposed. This new approach was conceived to avoid some drawbacks of MCSA, such as its eventual false diagnostic indications (either false positives or negatives) that may rise for certain motor constructive characteristics (presence of rotor cooling ducts, motors with double cage rotors, anisotropic rotor cores…) or operating conditions (load torque oscillations, no-load conditions, …) as well as its unsuitable application under varying speed conditions [7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Reliable Detection of Rotor Winding Asymmetries in Wound Rotor Induction Motors via Integral Current Analysis

Antonino-Daviu

Quijano-López

Climente-Alarcón

et al. 2017

IEEE Trans. on Ind. Applicat.

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Abstract-Current analysis has been widely employed in academy and industry for the diagnosis of rotor damages in cage induction motors. The conventional approach based on the FFT analysis of steady-state current (MCSA) has been recently complemented with the development of alternative techniques that rely on the time-frequency analysis of transient quantities of the machine. These techniques may bring important advantages that are related to the avoidance of eventual false indications provided by the classical MCSA. Moreover, their application is also suitable for variable speed conditions. However, the application of current-based methodologies to wound rotor induction motors (WRIM) has been much less studied and, hence, their validation in field WRIM is scarce. The present work proposes the application of an integral methodology based on the analysis of both stationary and transient currents for the diagnosis of winding asymmetries in WRIM. The method, based on up to five different fault evidences, is validated in laboratory motors and it is subsequently applied to a large field motor (1,500 kW) that was showing signs of abnormal rotor functioning. The results prove that the method is of interest for the field since it helps to ratify without ambiguity the existence of eventual asymmetries in the rotor windings, with no interference with the machine operation. However, due to the complex constructive nature of the rotor winding as well as the presence of auxiliary systems (slip rings, brushes, contactors, etc…), once the fault presence is detected, it may be interesting the utilization of complementary tools to accurately locate the root cause of the asymmetry.

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Section: Integral Methods Based On Current Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reliable Detection of Rotor Winding Asymmetries in Wound Rotor Induction Motors via Integral Current Analysis

Antonino-Daviu

Quijano-López

Climente-Alarcón

et al. 2017

IEEE Trans. on Ind. Applicat.

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“…11. Visual inspection and a series of off-line tests showed that the rotor was in good condition, and the investigation presented in [15] revealed that the false alarm is produced by rotor core magnetic anisotropy. The 20 and Fig.…”

Section: B Results and Discussionmentioning

confidence: 94%

“…6(a), to suspect a broken bar. The reason the startup test method is not influenced by the magnetic anisotropy is because the flux is distributed on the surface of the rotor at startup due to eddy current rejection of the rotor cage [15]. With the flux concentrated at the rotor surface, it is not influenced by the anisotropy of the core.…”

Section: B Results and Discussionmentioning

confidence: 99%

“…These components that appear intermittently can cause confusion when diagnosing the motor with MCSA or discrete transforms. The third motor, M3, is a 3.3 kV, 200 kW, 2 pole crude oil pump motor, for which MCSA produced a false rotor fault indication due to rotor core magnetic anisotropy, as described in [15]. The startup data of this motor was analyzed to observe if startup analysis can provide reliable diagnosis.…”

Section: A Diagnosed Motorsmentioning

confidence: 99%

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Advanced Rotor Fault Diagnosis for Medium-Voltage Induction Motors Via Continuous Transforms

Antonino-Daviu

Pons-Llinares

Lee

2016

IEEE Trans. on Ind. Applicat.

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-A number of field case studies for rotor fault diagnosis on medium voltage induction motors operating in a petrochemical plant are presented in this paper. The methodology employed is based on analyzing the induction motor startup current with advanced signal processing tools (Continuous Transforms) that enable a capture of a 'complete picture' of the rotor condition. Indeed, unlike the classical tools that often rely on the detection of few fault frequencies, these new tools allow extraction of the evolution of a wide range of fault components during the startup transient and steady-state evolutions, which enables improved reliability. This is crucial in medium-high voltage motors, where a false diagnosis may result in significant expense due to inspection, repair, or forced outage.An additional contribution of the work is its immunity to external voltage supply disturbances, which introduce components that are not related to the failure, and which are difficult to detect with classical tools. The results of the work prove how the advanced continuous tools enable an improved visualization of the fault components, distinguishing them from the other components that are not linked to the failure.

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On proposing a non-intrusive device and methodology to monitor motor degradation

Kuhn

Righi

Crovato

2023

Journal of King Saud University - Engineering Sciences

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Evaluation of the Influence of Rotor Magnetic Anisotropy on Condition Monitoring of Two-Pole Induction Motors

Cited by 33 publications

References 21 publications

Reliable Detection of Rotor Winding Asymmetries in Wound Rotor Induction Motors via Integral Current Analysis

Reliable Detection of Rotor Winding Asymmetries in Wound Rotor Induction Motors via Integral Current Analysis

Advanced Rotor Fault Diagnosis for Medium-Voltage Induction Motors Via Continuous Transforms

On proposing a non-intrusive device and methodology to monitor motor degradation

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