Diagnostics of rotor-cage faults supported by effects due to higher mmf harmonics

Sobczyk, Tadeusz; Maciolek, W.

doi:10.1109/ptc.2003.1304324

Cited by 32 publications

(24 citation statements)

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“…VIII. COMPARISON BETWEEN LUSBBI AND HCSBBIS Fig.16 reports theoretical trends of the classic LSB-based indicator (Γ (1) (s,ω) function) and of two HCSBBIs (Γ (5) and Γ (7) ), from definition (5). The heavy dependence of Γ (1) on slip and frequency (already verified experimentally) is fully evidenced.…”

Section: Laboratory Tests For Accurate Model Settingmentioning

confidence: 71%

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Evaluation of Classic and Innovative Sideband-Based Broken Bar Indicators by Using an Experimental Cage and a Transformed (n, m) Complex Model

Bruzzese

Honorati

Santini

2007

2007 IEEE International Symposium on Industrial Electronics

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In this work the results of a measuring and simulation campaign performed on an experimental induction motor with artificial broken bars are presented, aiming to extract spectral current components useful for fault detection. With nonsinusoidal feeding a lot of frequencies other than (1-2s)f (lowersideband, LSB) and (1+2s)f (upper-sideband, USB) arise, in proximity of low-order current harmonics, that can be good fault indicators. Current signature analysis-based techniques (CSABT) can take advantage by these harmonic current sidebands (HCSBs) since they are less dependent on load, frequency, drive inertia and motor parameters, so producing a better fault estimation. The measures were matched with simulations carried out by using a topologically complete mathematical complex model. Machine parameters were obtained by 2D and 3D FEA. A comparison between LSB/USB-based indicators (LUSBBIs) and HCSB-based indicators (HCSBBIs) suggests to use the latter whenever a broken bar diagnosis must be attempted for inverter-fed motors.Index Terms-Broken bars, finite elements, harmonic current sidebands, identification, spectral analyses, multiphase model.

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Section: Laboratory Tests For Accurate Model Settingmentioning

confidence: 71%

“…On the other hand, drawbacks and limitations of LUSBBIs are well known [5], [6], [7], as far as CSABTs must be applied for broken bar diagnosis.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Classic and Innovative Sideband-Based Broken Bar Indicators by Using an Experimental Cage and a Transformed (n, m) Complex Model

Bruzzese

Honorati

Santini

2007

2007 IEEE International Symposium on Industrial Electronics

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“…Similarly, previous contributions have shown that broken bar fault signatures close to the fifth and seventh current harmonics offer valuable broken bar fault detection potential [29], [41]. Therefore, before analyzing the ZSC results, it is crucial to study the MCSA method's capability in detail.…”

Section: B Mcsa Resultsmentioning

confidence: 96%

Comparative experimental investigation of broken bar fault detectability in induction motors

Gyftakis

Antonino-Daviu

Garcia-Hernandez

et al. 2015

2015 IEEE 10th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED)

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This article has been accepted for publication in IEEE Transactions on Industry Applications. "© © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works."Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders. Abstract -It has been shown in the past that the zerosequence current spectrum can be reliably used to detect broken bar faults in induction motors. Previous work was carried out with extensive FEM analysis. Although it allows detailed study of spatial and time-dependent electromagnetic characteristics of induction motors, FEM is a heavily timeconsuming tool and this limits full study. So, in this work, extensive experimental testing has been performed to validate the zero sequence current spectrum for detecting rotor asymmetries. Three identical induction motors have been used: one healthy, one with a broken rotor bar, and one with two broken rotor bars. The motors were tested under different voltage supply levels and with different mechanical loads. The zero-sequence current spectrum was calculated after measuring the three phase currents. It is for the first time experimentally shown that this approach offers greater diagnostic potential than traditional MCSA. CURVE is the Institutional Repository for Coventry University

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“…On the other hand, the CBM approach requires more effective motor diagnostic tools, and so an increasing research effort has been consequently devoted to the development of affordable fault indicators [1], [2], [3], [4].…”

Section: Introductionmentioning

confidence: 99%

“…Signature analysis of cage induction motor phase current (MPCSA) for broken bars detection and fault severity assessment has been usually attempted looking at (1-2s)f and (1+2s)f frequencies sidebands (LSB and USB respectively) [2], [3], [4], but more than one researcher has opined about the goodness of such sidebands as fault-indicators [3], [5].…”

Section: Introductionmentioning

confidence: 99%

Harmonic Current Sideband-Based Novel Indicators of Broken Bars for On-line Evaluation of Industrial and Railway Cage Motor Faults

Bruzzese

Honorati

Santini

2007

2007 IEEE International Symposium on Industrial Electronics

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In this paper the authors present some original and effective fault indicators for broken bars detection in power squirrel cage induction motors. Motor Phase Current Signature Analysis (MPCSA) can be performed by evaluating the typical ratios I (7-2s)f /I 5f and I (5+2s)f /I 7f , I (13-2s)f /I 11f and I (11+2s)f /I 13f , etc., which appear in the phase current spectrum of faulted motors fed by non-sinusoidal low-switching-frequency voltage sources. Main advantages of the new indicators are: a) accentuate insensitivity to disturbs like load torque, drive inertia, and frequency variations, b ) independence with respect to machine parameters and c) linear dependence on fault gravity. They can be directly applied on motors fed by GTO/Thyristor converters. Railway traction motor diagnostics is a possible target.The mathematical formulation has been based on the MultiPhase Symmetrical Components Theory; parameter identification was obtained by 2D-3D FEM analyses; experimental work was performed by using a motor with an appositely prepared cage. NOMENCLATURE Matrices ( ) [ ] ( ) 1 nx S t i , ( ) [ ] ( ) 1 mx R t i Stator and rotor current vectors, A.( ) [ ] ( ) 1 nx S t v , ( ) [ ] ( ) 1 mx R t v Impressed voltage vectors, V.( ) [ ] ( ) 1 nx S t ψ , ( ) [ ] ( ) 1 mx R t ψ Magnetic linked flux vectors, Wb.

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Diagnostics of rotor-cage faults supported by effects due to higher mmf harmonics

Cited by 32 publications

References 1 publication

Evaluation of Classic and Innovative Sideband-Based Broken Bar Indicators by Using an Experimental Cage and a Transformed (n, m) Complex Model

Evaluation of Classic and Innovative Sideband-Based Broken Bar Indicators by Using an Experimental Cage and a Transformed (n, m) Complex Model

Comparative experimental investigation of broken bar fault detectability in induction motors

Harmonic Current Sideband-Based Novel Indicators of Broken Bars for On-line Evaluation of Industrial and Railway Cage Motor Faults

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