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Dissertations / Theses on the topic 'Motor fault analysis'

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Published: 4 June 2021

Last updated: 15 February 2022

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1

Alwodai, Ahmed. "Motor fault diagnosis using higher order statistical analysis of motor power supply parameters." Thesis, University of Huddersfield, 2015. http://eprints.hud.ac.uk/id/eprint/26620/.

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Motor current signature analysis (MCSA) has been an effective method to monitor electrical machines for many years, predominantly because of its low instrumentation cost, remote implementation and comprehensive information contents. However, it has shortages of low accuracy and efficiency in resolving weak signals from incipient faults, such as detecting early stages of induction motor fault. In this thesis MCSA has been improved to accurately detect electrical and mechanical faults in the induction motor namely broken rotor bars, stator faults and motor bearing faults. Motor current signals c

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2

Abed, Wathiq. "Robust fault analysis for permanent magnet DC motor in safety critical applications." Thesis, University of Plymouth, 2015. http://hdl.handle.net/10026.1/3550.

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Robust fault analysis (FA) including the diagnosis of faults and predicting their level of severity is necessary to optimise maintenance and improve reliability of Aircraft. Early diagnosis of faults that might occur in the supervised process renders it possible to perform important preventative actions. The proposed diagnostic models were validated in two experimental tests. The first test concerned a single localised and generalised roller element bearing fault in a permanent magnet brushless DC (PMBLDC) motor. Rolling element bearing defect is one of the main reasons for breakdown in electr

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3

Kozovský, Matúš. "Modelování a řízení střídavých elektrických pohonů při poruše." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-437978.

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Dizertační práce se zabývá modelováním a řízením elektrických pohonů během poruchových stavů. Práce se obzvláště zaměřuje na více-fázové motory. První část práce se zabývá matematickými rovnicemi obecného více-fázového motoru a následným odvozením n-krát troj-fázového zapojení motoru. Modely v dq souřadnicovém systému a modely ve statorových souřadnicích jsou navrženy pro simulaci chování motoru během poruchových stavů. Další část práce se zabývá analýzou poruch ve více-fázových motorech s využitím matematických modelů. Různé vnitřní struktury vinutí motoru jsou analyzovány z pohledu možného ř

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4

Gao, Feng. "Interior Permanent Magnet Synchronous Motor Demagnetization Fault Modeling and Analysis by Using Dynamic Phasors Model." Thesis, North Dakota State University, 2014. https://hdl.handle.net/10365/27473.

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Interior permanent magnet synchronous motor (IPMSM) has been widely used in hybrid electric vehicles (HEVs) since the high power density and efficiency. However, the primary drawback of IPMSM is the demagnetization phenomenon caused by the permanent magnets. Modeling of the demagnetization fault are important in developing and designing a protection system for the traction on HEVs, thus, an efficient and accurate IPMSM model for demagnetization fault simulation is necessary. By using the conventional dq0 IPMSM model, the current indicators of demagnetization fault are affected by noise which w

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5

Nour, Fathy E. "The analysis of vibration signals during induction motor starting transients with a view to early fault detection." Thesis, Robert Gordon University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294706.

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6

Arafat, AKM. "ANALYSIS AND CONTROL OF FIVE-PHASE PERMANENT MAGNET ASSISTED SYNCHRONOUS RELUCTANCE MOTOR DRIVE UNDER FAULTS." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1524168102423576.

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7

Babu, Hareesh. "Finite-element analysis of an induction motor with inter-turn short-circuit faults." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-290082.

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Stator inter-turn short circuit (ITSC) faults are one of the common sources for induction machine failure affecting their reliable operation. In this thesis, a finite element (FE) model is developed to study the ITSC fault. The FE model is developed for a prototype induction machine that has the potential to emulate an ITSC fault in the stator. With the developed FE model of the prototype machine, a simulation study is performed to understand the behaviour of various electrical and magnetic quantities in time- and frequency-domain. The investigated quantities are potentially good signatures of

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8

Marques, Miguel Alexandre Castanheira. "On-line system for faults detection in induction motors based on PCA." Master's thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/8578.

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Dissertation to obtain the degree of Master in Electrical and Computer Engineering<br>Nowadays in the industry there many processes where human intervention is replaced by electrical machines, especially induction machines due to his robustness, performance and low cost. Although, induction machines are a high reliable device, they are also susceptible to faults. Therefore, the study of induction machine state is essential to reduce human and financial costs. The faults in induction machines can be divided mainly into two types: electrical faults and mechanical faults. Electrical faults repre

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9

Ahnesjö, Henrik. "Fault detection of planetary gearboxes in BLDC-motors using vibration and acoustic noise analysis." Thesis, Uppsala universitet, Institutionen för elektroteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-425966.

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This thesis aims to use vibration and acoustic noise analysis to help a production line of a certain motor type to ensure good quality. Noise from the gearbox is sometimes present and the way it is detected is with a human listening to it. This type of error detection is subjective, and it is possible for human error to be present. Therefore, an automatic test that pass or fail the produced Brush Less Direct Current (BLDC)-motors is wanted. Two measurement setups were used. One was based on an accelerometer which was used for vibration measurements, and the other based on a microphone for acou

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10

Rabbi, Ata-E. "Detection of stator interturn fault of synchronous machine by rotor current analysis : A SIMULATION APPROACH." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187654.

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One of the major electrical faults of synchronous machines is an interturn short circuit in the stator winding, due to winding insulation failure. A synchronous machine is designed to have electrical and mechanical symmetry in the stator and rotor. An interturn fault in a synchronous machine damages the symmetrical property, thereby inducing abnormal symptoms like varying torque, mechanical vibration, and deviation of stator and rotor terminal currents from their usual waveform. This last symptom is what is studied in this thesis, as an indicator of the presence of an interturn fault. An inter

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11

Wu, Long. "Separating Load Torque Oscillation and Rotor Faults in Stator Current Based-Induction Motor Condition Monitoring." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14545.

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Stator current spectral analysis techniques are usually used to detect rotor faults in induction machines. Magnetic field anomalies in the airgap due to the rotor faults result in characteristic side-band harmonic components in the stator current spectrum, which can be measured as rotor fault signatures. A position-varying load torque oscillation at multiples of the rotational speed, however, has exactly the same effect. Stator current harmonics due to a load torque oscillation often obscure and even overwhelm rotor eccentricity fault detection since the magnitude of load oscillation induce

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12

Dias, Cleber Gustavo. "Proposta de um novo método para a detecção de barras rompidas em motores de indução com rotor em gaiola." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-15092006-165225/.

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O estudo das condições de operação de um motor de indução em um ambiente industrial é indispensável, tendo em vista que eventuais problemas podem contribuir para um prejuízo na produção, ou ainda para custos adicionais relacionados à falta de manutenção dos equipamentos. Uma das principais falhas que podem ocorrer em um motor de indução do tipo gaiola de esquilo durante sua operação é o rompimento de uma ou mais barras que compõem o seu rotor. Apresenta-se neste trabalho um novo método para auxiliar na detecção de barras quebradas em um rotor tipo gaiola de esquilo, para um motor de grande por

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13

Cruz, Amanda Guerra de Araújo. "Sistema híbrido para diagnóstico de falhas em motores de indução trifásicos com base no método vibracional, corrente de armadura e lógica fuzzy." Universidade Federal da Paraíba, 2015. http://tede.biblioteca.ufpb.br:8080/handle/tede/8962.

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Submitted by Maike Costa (maiksebas@gmail.com) on 2017-05-24T12:51:24Z No. of bitstreams: 1 arquivototal.pdf: 2705219 bytes, checksum: cb06011410866630871a99b2788703f1 (MD5)<br>Made available in DSpace on 2017-05-24T12:51:24Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 2705219 bytes, checksum: cb06011410866630871a99b2788703f1 (MD5) Previous issue date: 2015-10-26<br>The three-phase induction motors are the most important way for electromechanical conversion, being present in almost every industrial process. Because of their importance, it is crucial that these devices have a proper p

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14

Wanner, Daniel. "Controlling over-actuated road vehicles during failure conditions." Doctoral thesis, KTH, Fordonsdynamik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-166819.

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The aim of electrification of chassis and driveline systems in road vehicles is to reduce the global emissions and their impact on the environment. The electrification of such systems in vehicles is enabling a whole new set of functionalities improving safety, handling and comfort for the user. This trend is leading to an increased number of elements in road vehicles such as additional sensors, actuators and software codes. As a result, the complexity of vehicle components and subsystems is rising and has to be handled during operation. Hence, the probability of potential faults that can lead

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15

Dejan, Reljić. "Otkrivanje kvara rotora kaveznog asinhronog motora primenom tehnika analize terminalnih veličina." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2017. https://www.cris.uns.ac.rs/record.jsf?recordId=104840&source=NDLTD&language=en.

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U disertaciji je predložena metoda za pouzdano otkrivanje kvara rotoratrofaznog kaveznog asinhronog motora. Metoda je zasnovana naidentifikaciji obeležja kvara rotora iz signala terminalnih veličinajednofazno napojenog trofaznog kaveznog motora u stacionarnom stanjupogona. Predložena metoda eliminiše potrebu za postojanja opterećenjamotora, što je osnovna prednost u odnosu na rešenja iz literature. Svateorijska razmatranja su praćena odgovarajućim rezultatima računarskihsimulacija, da bi se potom sprovela eksperimentalna verifikacija ipotvrdila efikasnost predložene metode. Takođe, predstavlje

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16

Davari, Ardakani Hossein. "Prognostics and Health Management of Engineering Systems Using Minimal Sensing Techniques." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1467987980.

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17

Moosavi, Anchehpoli Seyed Saeid. "Analysis and diagnosis of faults in the PMSM drivetrains for series hybrid electrical vehicles (SHEVs)." Thesis, Belfort-Montbéliard, 2013. http://www.theses.fr/2013BELF0224/document.

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L'intérêt pour les véhicules électriques ne cesse de croitre au sein de la société contemporaine compte tenu de ses nombreuses interrogations sur l’environnement et la dépendance énergétique. Dans ce travail de thèse, nous essayons d’améliorer l’acceptabtabilité sociétale du véhicule électrique en essayant de faire avancer la recherche sur le diagnostique des défauts d’une chaine de traction électrique. Les résultats escomptés devraient permettre à terme d’améliorer la fiabilité et la durabilité de ces systèmes.Nous commençons par une revue des problèmes des défauts déjà apparus dans les véhic

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18

Liao, Yonghui. "Analysis of fault conditions in permanentmagnet in-wheel motors." Thesis, KTH, Elektrisk energiomvandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-53685.

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The use of light in-wheel motors is an attractive alternative for smaller passenger vehicles in urban areas. An in-wheel motor design has already been developed in a previous master thesis project. In this project, the proposed design is further analysed during electrical faults using a FEM software package (JMAG). A failure modes and effects analysis (FMEA) is carried out to identify the important faults. The faults simulated in this project are: phase short circuit, phase open circuit, high impedance, inter-turn short circuit, magnetization faults and inverter faults. Each of these faults is

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19

Jayakumar, Gautham. "Modeling And Analysis Of Fault Conditions In Avehicle With Four In-Wheel Motors." Thesis, KTH, Fordonsdynamik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-121475.

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A vast expansion is found in the field of automotive electronic systems. The expansion iscoupled with a related increase in the demands of power and design. Now, this is goodarena of engineering opportunities and challenges. One of the challenges faced, isdeveloping fault tolerant systems, which increases the overall automotive and passengersafety. The development in the field of automotive electronics has led to the innovationof some very sophisticated technology. However, with increasing sophistication intechnology also rises the requirement to develop fault tolerant solutions.As one of many

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20

Burnett, Ronald. "Transient current analysis for fault detection in large induction motors." Thesis, Robert Gordon University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318552.

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21

Venugopal, Arvind Madabushi. "Comparative analysis of electrical and mechanical fault signatures in induction motors." Texas A&M University, 2003. http://hdl.handle.net/1969.1/1618.

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This research deals with the comparison of fault signatures in induction motors. The primary objective is to study and analyze the similarities in the electrical and mechanical fault signatures, and to determine the suitability of the former for effective motor fault detection. Currently, vibration analysis is the dominant means for mechanical fault detection for use in condition-based maintenance. The use of electrical signatures for mechanical fault detection in electric motors is becoming of interest. Due to its cost-effective nature and ease of use, electrical sensors are preinstalled at t

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22

Toman, Jiří. "Simulační modelování elektrických pohonů pro vybrané kritické aplikace." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-364599.

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The dissertation thesis with the topic „Simulation Modelling of Electrical Drives for Selected Critical Applications“ focuses on the area of given applications in civil aviation. The selected application that the thesis deals with is an electrically driven and electronically controlled fuel pump supplying fuel to an aviation motor of the APU type. The thesis gives a comprehensive description of the design cycle of the unit and demonstrates implementing all the required critical functions. In the course of the design of the unit modern techniques in mathematical modelling, simulation, verificat

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23

Stavrou, Andreas. "Analysis and simulation of faults in squirrel cage motors." Thesis, University of Aberdeen, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390266.

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Condition based maintenance of electrical machines offers significant advantages for industry. A large part of the research effort in this area is directed towards the evaluation of fault conditions. This thesis is concerned with analysing and modelling faults in induction motors. A method for evaluating the performance of induction machines with static and dynamic eccentricity is developed, using harmonic analysis of the air gap permeance. Models able to simulate eccentricity are presented. The slip ring model equations are obtained and then used to obtain the commutator models transformed to

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24

Saavedra, Ordóñez Harold. "Analysis and design of fault tolerant axial flux permanent magnet synchronous motors." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/286323.

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Electric vehicles (EVs) are attractive comparted to internal combustion engine powered vehicles due to several benefits, including low emissions, higher efficiency, less maintenance costs, stronger acceleration or lower fuel price, among others. EVs require traction motors with especial features, including high efficiency, high power and torque density, compactness, precise torque control, extended speed range. This work focuses on the analysis and optimal electromagnetic design of fault tolerant permanent magnet synchronous motors. The study is mainly based on the research of analytical desig

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Bade, Rajesh Kumar. "Analysis of incipient fault signatures in inductive loads energized by a common voltage bus." Texas A&M University, 2004. http://hdl.handle.net/1969.1/3095.

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Recent research has demonstrated the use of electrical signature analysis (ESA), that is, the use of induction motor currents and voltages, for early detection of motor faults in the form of embedded algorithms. In the event of multiple motors energized by a common voltage bus, the cost of installing and maintaining fault monitoring and detection devices on each motor may be avoided, by using bus level aggregate electrical measurements to assess the health of the entire population of motors. In this research an approach for detecting commonly encountered induction motor mechanical faults from

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26

Colberg, Francis R. "Damage analysis of internal faults in flux concentrating permanent magnet motors." Thesis, Monterey, California. Naval Postgraduate School, 1994. http://hdl.handle.net/10945/25798.

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It is the purpose of the proposed research to develop a digital computer simulation model to study the effects of an internal fault in a large permanent magnet ac synchronous motor. Permanent magnet motors are being considered as an alternative for ships with electric propulsion systems. In an electric propulsion system a large motor will be directly connected to a propulsion shaft. A windmilling shaft will continue to turn the rotor of the propulsion motor after the motor has been disconnected from its electrical power supply source. Following an internal electrical fault in a propulsion moto

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27

Colberg, Francis R. (Francis Rodolfo). "Damage analysis of internal faults in flux concentrating permanent magnet motors." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/36498.

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Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1994, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.<br>Includes bibliographical references (leaves 67-68).<br>by Francis R. Colberg.<br>M.S.<br>Nav.E.

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Blödt, Martin Faucher Jean Regnier Jérémi. "Condition monitoring of mechanical faults in variable speed induction motor drives." Toulouse : INP Toulouse, 2006. http://ethesis.inp-toulouse.fr/archive/00000313.

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Blödt, Martin. "Condition Monitoring of Mechanical Faults in Variable Speed Induction Motor Drives. Application of Stator Current Time-Frequency Analysis and Parameter Estimation." Phd thesis, Toulouse, INPT, 2006. http://oatao.univ-toulouse.fr/7468/1/blodt.pdf.

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This Ph.D. thesis deals with condition monitoring of mechanical failures in variable speed induction motor drives by stator current analysis. Two effects of a mechanical fault are considered: load torque oscillations and airgap eccentricity. The analytical modelling using the magnetomotive force and permeance wave approach leads to two stator current models. The fault provokes amplitude or phase modulation of the fundamental current component. Suitable detection methods are spectral analysis and parameter estimation in steady state whereas time-frequency analysis is required during transients.

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Salatiel, Paulo César Mendes. "Técnicas de diagnóstico de avarias em motores de indução baseadas no quadro da corrente elétrica estatórica." Master's thesis, Instituto Politécnico de Setúbal. Escola Superior de Tecnologia de Setúbal, 2019. http://hdl.handle.net/10400.26/31369.

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Dissertação submetida como requisito parcial para obtenção do grau de Mestre em Engenharia Eletrotécnica e Computadores<br>Os variados setores da indústria, tendo por objetivo otimizar os processos de produção e evitar custos substanciais devido a perdas de produção não programadas, têm exigido que os setores relacionados com a manutenção dos equipamentos adotem medidas que estão inseridas no âmbito da manutenção preventiva. O Motor de Indução Trifásico representa de momento a máquina elétrica rotativa mais utilizada nos setores industriais. Deste modo, existe a necessidade de adotar sistemas

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Blödt, Martin. "Condition Monitoring of Mechanical Faults in Variable Speed Induction Motor Drives - Application of Stator Current Time-FrequencyAnalysis and Parameter Estimation." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2006. http://tel.archives-ouvertes.fr/tel-00105482.

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Ce travail de thèse traite de la détection et du diagnostic de défaillances mécaniques par analyse du courant statorique dans les entraînements électriques à base de machine asynchrone. Deux effets d'un défaut mécanique, des oscillations de couple et une excentricité d'entrefer, sont supposés. La modélisation par approche des ondes de forces magnétomotrices et de perméance conduit à deux modèles analytiques du signal courant. La conséquence des défauts est soit une modulation de phase, soit une modulation d'amplitude du signal courant statorique. Ces phénomènes sont détectés par une analyse sp

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Nóbrega, Sobrinho Carlos Alberto. "Estudo comparativo de técnicas para Diagnóstico de falhas em motores de Indução trifásicos." Universidade Federal da Paraíba, 2015. http://tede.biblioteca.ufpb.br:8080/handle/tede/8958.

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Submitted by Maike Costa (maiksebas@gmail.com) on 2017-05-22T15:08:58Z No. of bitstreams: 1 arquivo total.pdf: 10123779 bytes, checksum: a9bc3c38b693c977dc116bf2cde4af83 (MD5)<br>Made available in DSpace on 2017-05-22T15:08:58Z (GMT). No. of bitstreams: 1 arquivo total.pdf: 10123779 bytes, checksum: a9bc3c38b693c977dc116bf2cde4af83 (MD5) Previous issue date: 2015-08-31<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>Electrical motors are responsible for 95% of primary movement source in industrialized nations. Among those, 90% are Three-Phase Induction Motors,

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Trajin, Baptiste. "Analyse et traitement de grandeurs électriques pour la détection et le diagnostic de défauts mécaniques dans les entraînements asynchrones. Application à la surveillance des roulements à billes." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2009. http://tel.archives-ouvertes.fr/tel-00554240.

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Les entraînements électriques à base de machine asynchrone sont largement utilisés dans les applications industrielles en raison de leur faible coût, de leurs performances et de leur robustesse. Cependant, des modes de fonctionnement dégradés peuvent apparaître durant la vie de la machine. L'une des raisons principales de ces défaillances reste les défauts de roulements à billes. Afin d'améliorer la sûreté de fonctionnement des entraînements, des schémas de surveillance peuvent être mis en place afin d'assurer une maintenance préventive. Ce travail de thèse traite de la détection et du diagnos

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Frini, Marouane. "Diagnostic des engrenages à base des indicateurs géométriques des signaux électriques triphasés." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSES052.

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Bien qu’ils soient largement utilisés dans le domaine, les mesures vibratoires classiques présentent plusieurs limites. A la base, l’analyse vibratoire ne peut identifier qu’environ 60% des défauts qui peuvent survenir dans les machines. Cependant, les principaux inconvénients des mesures de la vibration sont l’accès difficile au système de transmission afin d’y placer le capteur ainsi que le coût conséquent de la mise en œuvre. Ceci résulte en des problèmes de sensibilité relatifs à la position de l’installation et ceux de difficulté pour distinguer la source de vibration à cause de la divers

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Peres, Pedro Miguel Courelas. "Switched Reluctance Motor Fault Tolerant Operation." Master's thesis, 2019. http://hdl.handle.net/10362/96709.

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In recent years, with the development of micro and power electronics, the switched reluctance machine has been gaining popularity. This type of machine is attractive because it has a cheap and easy construction, having absence of rotor windings and permanent magnets. It has also an inherent fault tolerance ability. Due to this fault tolerance it has gained the attention of industries and applications that require safe and reliable operation. However, the machine is only fault tolerant to a point and, with the aim of improving its already high fault tolerance, multiple studies were condu

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Wang, Jung-Hong, and 汪俊宏. "Simulations and Analysis of DC Motor Fault-SignalForewarning of a Steel Plant." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86538260661456497695.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>95<br>In this thesis, simulations and measurements of DC motors of a steel plant have been carried out in order to develop a forewarning system such that the predictive maintenance can be better realized. In the method, each component of the steel devices was first individually formulated. Then, after connecting each model through a one-line diagram, the integrated scheme was validated through different scenarios, including load variations, low power-quality, bearing bias and shorting of a stator phase winding. It was expected that the fault probability can be pru

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Cruz, Sérgio Manuel Ângelo da. "Diagnóstico e análise de avarias nos enrolamentos estatóricos de motores de indução trifásicos através da aplicação do método dos referenciais múltiplos." Doctoral thesis, 2004. http://hdl.handle.net/10316/2071.

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Tese de doutoramento em Engenharia Electrotécnica (Sistemas de Energia) apresentada à Fac. de Ciências e Tecnologia de Coimbra<br>O objectivo primordial deste trabalho é o de propor um novo método de diagnóstico de avarias nos enrolamentos estatóricos de motores de indução trifásicos, quando estes são alimentados quer por fontes de tensão sinusoidal quer por conversores de frequência com controlo directo de binário (DTC). No primeiro capítulo da dissertação, de natureza introdutória, são sintetizadas as principais causas, consequências e métodos de diagnóstico de avarias nos enrolamentos esta

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Thirumarai, Chelvan Ilamparithi. "Non-invasive detection of air gap eccentricity in synchronous machines using current signature analysis." Thesis, 2012. http://hdl.handle.net/1828/4355.

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Air gap eccentricity fault is one of the major faults that afflict the life and performance of rotating machines. Eccentricity fault, in the worst case, causes a stator rotor rub. Thus, a condition monitoring scheme to identify eccentricity fault at its initial stage is necessary. The most widely practised air gap monitoring schemes for synchronous machines are expensive and invasive sensors based. This work has focussed on developing an inexpensive, non-invasive, air gap monitoring technique especially for salient pole synchronous machines. Motor current signature analysis has been mostly pre

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Estima, Jorge Oliveira. "Development and analysis of permanent magnet synchronous motor drives with fully integrated inverter fault-tolerant capabilities." Doctoral thesis, 2012. http://hdl.handle.net/10316/21407.

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Wen, Pao-Lin, and 溫柏霖. "Design and Implementation of Intelligent Adjustable-Speed Motor Rotary Fault Diagnosis System Using the Principal Component Analysis." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/9c9773.

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碩士<br>國立臺北科技大學<br>電機工程系研究所<br>99<br>This thesis is aimed at detecting adjustable-speed motor rotary faults and implements an intelligent diagnosis system. The system measures the vibration signals by using the wireless sensor node mounted on the motor. A sensorless speed estimation algorithm is developed to find out the mechanical rotary frequency of adjustable-speed motor. Moreover, the principal component analysis is used to intercept the fault characteristics. Finally, the system adopts the dynamic structure neural network to establish the diagnosis functionality. Since the traditional

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Chen, Ke-Fan, and 陳科帆. "Design and Implementation of Motor Speed-Varying Rotary Fault Diagnosis System Incorporating with the Hybrid Discriminant Analysis." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/6p7req.

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碩士<br>國立臺北科技大學<br>電機工程系所<br>100<br>For the intelligent motor fault diagnosis system, this thesis proposes a sensorless speed estimation algorithm to calculate the motor rotary frequency during speed-changing operations. The new system incorporates the hybrid discriminant analysis and the dynamic structure neural network to increase the accuracy of fault diagnosis. Traditional motor fault diagnosis system only focuses on the fixed rotary speed measurement. When the motor speed changes, the system requires a tachometer to measure the proper rotary frequency. Using the physical spectrum charact

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"Modeling of Air-Conditioner Compressor Single Phase Induction Motor for Transient Analysis." Master's thesis, 2012. http://hdl.handle.net/2286/R.I.15842.

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abstract: This thesis presents a new technique to develop an air-conditioner (A/C) compressor single phase induction motor model for use in an electro-magnetic transient program (EMTP) simulation tool. The method developed also has the capability to represent multiple units of the component in a specific three-phase distribution feeder and investigate the phenomenon of fault-induced delayed voltage recovery (FIDVR) and the cause of motor stalling. The system of differential equations representing the single phase induction motor model is developed and formulated. Implicit backward Euler method

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Nakhaeinejad, Mohsen. "Fault detection and model-based diagnostics in nonlinear dynamic systems." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2208.

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Modeling, fault assessment, and diagnostics of rolling element bearings and induction motors were studied. Dynamic model of rolling element bearings with faults were developed using vector bond graphs. The model incorporates gyroscopic and centrifugal effects, contact deflections and forces, contact slip and separations, and localized faults. Dents and pits on inner race, outer race and balls were modeled through surface profile changes. Experiments with healthy and faulty bearings validated the model. Bearing load zones under various radial loads and clearances were simulated. The model was u

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Chiang, Wei-Tseng, and 江威增. "Fault Analysis and Diagnosis System for Induction Motors." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/23051830948162492661.

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碩士<br>國立勤益科技大學<br>電機工程系<br>102<br>The main aim of this thesis is to implement a fault analysis by vibration measurement on induction motors, thereby to derive an intelligent fault analysis and diagnosis system for induction motors. Firstly, the faults are classified into three major categories, rotor core damage, bearing and electrical damages. Furthermore they are subdivided into ten classifications, they are rotor imbalance, curved rotor shaft, non-centralized, loose of rotor copper bar, damage of bearing inner ring, damage of bearing outer ring, balls damage, uneven gas gap, broken copper b

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Liu, Li Cartes David. "Robust fault detection and diagnosis for permanent magnet synchronous motors." 2006. http://etd.lib.fsu.edu/theses/available/07032006-181534.

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Thesis (Ph. D.)--Florida State University, 2006.<br>Advisor: David A. Cartes, Florida State University, College of Engineering, Dept. of Mechanical Engineering. Title and description from dissertation home page (viewed Sept. 18, 2006). Document formatted into pages; contains xii, 133 pages. Includes bibliographical references.

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Wang, Wun-Hong, and 王文宏. "Analysis and Fault Detection of Hall Sensors for Brushless DC Motors." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/05528578176783216854.

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碩士<br>國立彰化師範大學<br>電機工程學系<br>97<br>The purpose of this paper is to analyze how the fault of Hall sensors affect the driving system of a brushless DC motor. The analysis of this paper emphasizes the conducting sequence of inverter switches and the phase current of brushless DC motor when Hall sensors function well or malfunction. Finally, this paper presents a Hall sensors fault detection circuit to detect the three Hall sensor elements whether any of them has fault or not. The driving system for brushless DC motor is built on a DSP using TMS320LF2407A as its core and also contains protection ci

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Hsieh, Yu-Hua, and 謝侑樺. "Optimal Intrinsic Mode Function Based Identification and Analysis on Motors Bearing Fault." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/18689085648233872005.

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碩士<br>中原大學<br>電機工程研究所<br>100<br>Electric vehicles (EV) have become one of the major issues of industry in recent year. The capacity of battery and motor manufacture are promoted dramatically. This thesis studies step motors and wheel motors, and the current signals and vibration signals in these motors are analyzed to detect the bearing fault. Since bearing faults can be diagnosed quickly, the EV’s operation could be more stable. This thesis proposes a system to detect the bearing fault. First, various damage types of motor bearings derived from electrical discharge machining (EDM) are tailor

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Yi-WeiSu and 蘇奕維. "Faults Analysis of Rotor and Bearing for Three Phase Induction Motor Based on Random Forest." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/34k6j8.

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Vekanuru, Sasikiran. "Induction Generators Behavior Under Unbalanced Voltage And Fault Conditions." Thesis, 2010. http://etd.iisc.ernet.in/handle/2005/1423.

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In this thesis first the behavior of induction generators under unbalanced voltage conditions is studied. In this context, first the existing schemes for characterizing the unbalance in simple ways have been studied. The two schemes IEC, NEMA which are in use to quantify the unbalance, as an unbalance factor require the use of complex algebra. A new scheme to characterize voltage unbalance, without using any complex algebra has been proposed and its effectiveness is compared with the NEMA scheme. The performance of the induction generators under unbalanced voltage conditions is first studied u

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Αθανασόπουλος, Δημήτριος. "Διερεύνηση χαρακτηριστικών ασύγχρονης μηχανής διπλού κλωβού με τη μέθοδο πεπερασμένων στοιχείων". Thesis, 2012. http://hdl.handle.net/10889/5815.

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Η παρούσα διπλωματική εργασία εκπονήθηκε στο τμήμα Ηλεκτρολόγων Μηχανικών και Τεχνολογίας Υπολογιστών του Πανεπιστημίου Πατρών. Το θέμα που πραγματεύεται είναι η μελέτη των τριφασικών ασύγχρονων μηχανών διπλού κλωβού με διαφορετικά υλικά στις αυλακώσεις του δρομέα. Τα κύρια αντικείμενα που ερευνώνται είναι δύο. Το πρώτο είναι η ανάλυση και η κατανόηση της ηλεκτρομαγνητικής συμπεριφοράς κινητήρων διπλού κλωβού με διαφορετικά υλικά στις αυλακώσεις του δρομέα. Το δεύτερο είναι η μελέτη σφαλμάτων δρομέα σε μηχανές διπλού κλωβού και οι μέθοδοι διάγνωσης αυτών.<br>This thesis was carried out at the

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