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Dissertations / Theses on the topic 'Condition Monitoring of DC Motor'

Author: Grafiati

Published: 3 June 2025

Last updated: 20 July 2025

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1

Wen, Xin. "A hybrid intelligent technique for induction motor condition monitoring." Thesis, University of Portsmouth, 2011. https://researchportal.port.ac.uk/portal/en/theses/a-hybrid-intelligent-technique-for-induction-motor-condition-monitoring(bafbf73a-0813-44f8-8f00-9212cc54c890).html.

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The objective of this research is to advance the field of condition monitoring and fault diagnosis for induction motors. This involves processing the signals produced by induction motors, classifying the types and estimating the severity of induction motors faults. A typical process of condition monitoring and fault diagnosis for induction motors consists of four steps: data acquisition, signal analysis, fault detection and post-processing. A description of various kinds of faults that can occur in induction motors is presented. The features reflecting faults are usually embedded in transient

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2

Kambisseri, Roby Neelu. "Wireless communication using metasurfaces for condition monitoring in motor." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246051.

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Wireless sensors are used widely for condition monitoring in electric machines. The metal enclosure of an electric motor restricts the signal from sensors to radiate outside. The signal from the metal cavity needs to be guided to the only opening in the enclosure, through a narrow gap between the stator and the rotating rotor. Gap waveguide technology is proposed as a solution by texturing the stator surface with electromagnetic band gap (EBG) structures. Arrays of periodic holey structures are used to realize the metasurface waveguide. Two Bravais lattice structures – square and hexagonal, ar

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3

Moore, Sean. "Online condition monitoring of lithium ion batteries by performing impedance spectroscopy using a DC-DC converter." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29186.

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Li-Ion batteries are currently being used extensively in a variety of applications such as portable electronics, electric vehicles and grid storage applications, due to the high demand for high power and high energy density storage batteries. However, the usage of Li-Ion batteries requires extensive condition monitoring to increase overall performance and life expectancy. This research is focused on implementing rapid online condition monitoring techniques, using signal injection via the associated power converter in the battery management system. The technique implemented in this work is know

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4

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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5

Al-Arbi, Salem. "Condition monitoring of gear systems using vibration analysis." Thesis, University of Huddersfield, 2012. http://eprints.hud.ac.uk/id/eprint/17821/.

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It is often impractical to measure vibrations directly at /or close to their sources when condition monitoring gearbox systems. It is common to measure the vibration distant from the source due to limited access to the component which is to be monitored. In addition, operating the gearbox under different loads and speeds also produces vibration signals within different components. Vibration measured in this way may be significantly distorted by the effect of signal transmission paths and interference from other sources. Therefore, suppression of distortions is a key issue for remote measuremen

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Zheng, Lin. "Model-based condition monitoring of anti-lock braking systems." Thesis, University of Huddersfield, 2014. http://eprints.hud.ac.uk/id/eprint/20331/.

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The Anti-lock Braking System (ABS) is one of the most important safety features in modern vehicles. It is a device integrating complicated electronic systems, hydraulic systems and mechanical components. It is possible to produce faults in these systems due to extreme vehicle operating conditions, which may lead to the failure of the ABS. However, there has not been an effective mechanism available in current operation and service facilities, which allows the performance of the ABS to be checked on-board or at a service base. This research therefore aims to investigate and develop approaches w

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7

Sysoeva, Viktoriia. "Hidden Markov Model-Supported Machine Learning for Condition Monitoring of DC-Link Capacitors." Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1595978044573618.

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8

Rylands, Naasef. "Condition monitoring of induction motors in the nuclear power station environment." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29686.

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The induction motor is a highly utilised electrical machine in industry, with the nuclear industry being no exception. A typical nuclear power station usually contains more than 1000 motors, where they are used in safety and non-safety application. The efficient and fault-free operation of this machine is critical to the safe and economical operation of any plant, including nuclear power stations. A comprehensive literature review was conducted that covered the functioning of the induction machine, its common faults and methods of detecting these faults. The Condition Based Maintenance framewo

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9

Baqqar, Mabrouka. "Machine performance and condition monitoring using motor operating parameters through artificial intelligence techniques." Thesis, University of Huddersfield, 2015. http://eprints.hud.ac.uk/id/eprint/28315/.

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Condition monitoring (CM) of gearboxes is a necessary activity due to the crucial importance of gearboxes in power transmission in most industrial applications. There has long been pressure to improve measuring techniques and develop analytical tools for early fault detection in gearboxes. This thesis develops new gearbox monitoring methods by demonstrating that operating parameters (static data) obtained from machine control processes can be used, rather than parameters obtained from vibration and acoustic measurements. Such a development has important implications for the future of CM techni

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10

Dlamini, Mpendulo. "Development of an induction motor condition monitoring test rig And fault detection strategies." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/8686.

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Includes bibliographical references.<br>This thesis sets out to develop an induction motor condition monitoring test rig to experimentally simulate the common faults associated with induction motors and to develop strategies for detecting these faults that employ signal processing techniques. Literature on basic concepts of induction motors and inverter drives, the phenomena of common faults associated with induction motors, the condition monitoring systems were intensively reviewed.

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11

Treetrong, Juggrapong. "The use of parameter identification methods for the condition monitoring of electric motor drives." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.498681.

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Induction motors are the most widely used motors among electric motors in industries. These are due to their reasonable cost, reasonably small sizes, ruggedness, low maintenance, and operation with an easily available power supply including their high reliability. However, these motors are often exposed to hostile environments during operation. These abnormal situations may lead to early deterioration of motors i.e., development of faults. Without any actions, these faults may increase to severe problems such as secondary damages to downstream equipment, unexpected breakdowns. Condition monito

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12

Thanopoulos, Sotirios. "Condition Monitoring of MV Remotely Controlled Distributed Disconnectors." Thesis, KTH, Elektroteknisk teori och konstruktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215947.

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During the last decades, the power grid is getting rapidly digitalised in order to contribute to theestablishment of Smart Grids and evaluate efficiently the extracted bidirectional data from the powersystem infrastructure. This thesis focuses on the MV grid, since its design and operation have changedmainly because of distributed generation installations and the increased demand of information fromstakeholders. Thus, asset management constitutes a significant tool that can increase the reliability ofthe MV network’s operation and its level of control. Studies have shown that a maintenance pla

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13

Booth, James Edward. "The feasibility of using electrostatic charge condition monitoring for lubricant additive screening." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/64859/.

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International standards require lubricant formulators to develop additive packages that increase fuel economy, reduce environmental impact and minimise wear over ever increasing service intervals. However, additive behaviour and interactions between additives is not well understood. An absence of real-time technology has hindered understanding of additive behaviour and interaction between additives in tribo-contacts. The work presented in this thesis assessed whether electrostatic charge monitoring, which is sensitive to changes in surface chemistry, can offer insight into additive-surface beh

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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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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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Abu, Saad Samieh. "The utilisation of information available in a sensorless control system of an AC induction motor for condition monitoring." Thesis, University of Huddersfield, 2015. http://eprints.hud.ac.uk/id/eprint/28350/.

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Induction motor driven mechanical transmission systems are widely utilised in many applications across numerous sectors including industry, power generation and transportation. They are however subject to common failure modes primarily associated with faults in the driven mechanical components. Notably, gearboxes, couplings and bearings can cause significant defects in both the electrical and mechanical systems. Condition monitoring (CM) undertakes a key role in the detection of potential defects in the early development stages and in turn avoiding catastrophic operational and financial conseq

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Lu, Bin. "Energy Usage Evaluation and Condition Monitoring for Electric Machines using Wireless Sensor Networks." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14152.

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Energy usage evaluation and condition monitoring for electric machines are important in industry for overall energy savings. Traditionally these functions are realized only for large motors in wired systems formed by communication cables and various types of sensors. The unique characteristics of the wireless sensor networks (WSN) make them the ideal wireless structure for low-cost energy management in industrial plants. This work focuses on developing nonintrusive motor-efficiency-estimation methods, which are essential in the wireless motor-energy-management systems in a WSN architecture t

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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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Bin, Hasan M. M. A. "Current based condition monitoring of electromechanical systems : model-free drive system current monitoring : faults detection and diagnosis through statistical features extraction and support vector machines classification." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5732.

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A non-invasive, on-line method for detection of mechanical (rotor, bearings eccentricity) and stator winding faults in a 3-phase induction motors from observation of motor line current supply input. The main aim is to avoid the consequence of unexpected failure of critical equipment which results in extended process shutdown, costly machinery repair, and health and safety problems. This thesis looks into the possibility of utilizing machine learning techniques in the field of condition monitoring of electromechanical systems. Induction motors are chosen as an example for such application. Elec

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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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21

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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Cheng, Siwei. "Utilizing the connected power electronic converter for improved condition monitoring of induction motors and claw-pole generators." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43638.

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This dissertation proposes several simple, robust, and non-intrusive condition monitoring methods for induction motors fed by closed-loop inverters and claw-pole generators with built-in rectifiers. While the flexible energy forms synthesized by power electronic converters greatly enhance the performance and expand the operating region of induction motors and claw-pole generators, they also significantly alter the fault behavior of these electric machines and complicate the fault detection and protection. In this dissertation, special characteristics of the connected closed-loop inverter and

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23

Zhang, Pinjia. "Active thermal protection for induction motors fed by motor control devices." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34811.

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Induction motors are widely used in industrial processes. The malfunction of a motor may not only lead to high repair costs, but also cause immense financial losses due to unexpected process downtime. Since thermal overload is one of the major root causes of stator winding insulation failure, an accurate and reliable monitoring of the stator winding temperature is crucial to increase the mean time to catastrophic motor breakdown, and to reduce the extraordinary financial losses due to unexpected process downtime. To provide a reliable thermal protection for induction motors fed by motor co

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24

Ali, Emad, Jürgen Weber, and Matthias Wahler. "A Machine Learning Approach for Tracking the Torque Losses in Internal Gear Pump - AC Motor Units." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199438.

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This paper deals with the application of speed variable pumps in industrial hydraulic systems. The benefit of the natural feedback of the load torque is investigated for the issue of condition monitoring as the development of losses can be taken as evidence of faults. A new approach is proposed to improve the fault detection capabilities by tracking the changes via machine learning techniques. The presented algorithm is an art of adaptive modeling of the torque balance over a range of steady operation in fault free behavior. The aim thereby is to form a numeric reference with acceptable accura

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Schelén, Oscar. "Design of smart magnetic plug." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-86819.

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Bosch Rexroth in Mellansel is manufacturing hydraulic motors and constantly trying to improve their products to reduce downtime for their customers. An important thing to get a reliable system is to know the condition. In a hydraulic motor, it is crucial to determine the particle contamination of the oil to determine the condition. To do so many particle sensors have been tested by Bosch Rexroth but also other related companies during the past years. To this point, no sensor has been performing good enough to replace the ordinary magnetic plug for the laboratory tests at Bosch Rexroth. The or

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Najafi, Syed Ahmed Ali. "Energy Harvesting From Overhead Transmission Line Magnetic Fields." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1548448189459464.

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Valuch, Tomáš. "Okamžitá diagnostika stavu letadlových proudových motorů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254322.

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In this diploma thesis is elaborated design of diagnostic system for small jet engines. The aim is to describe the types of possible failures of jet engines, to determine important parameters characterizing the immediate state of engine and define methods for measurement of selected parameters. The first part is devoted to a description of selected types of small turbojet engines, followed by a summary of the most widely used diagnostic methods for assessing the health condition of the engine during operation. The next chapter contains calculation of the engine thermal cycle with characteristi

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Gao, Zhi. "Sensorless Stator Winding Temperature Estimation for Induction Machines." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/13966.

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The organic materials used for stator winding insulation are subject to deterioration from thermal, electrical, and mechanical stresses. Stator winding insulation breakdown due to excessive thermal stress is one of the major causes of electric machine failures; therefore, prevention of such a failure is crucial for increasing machine reliability and minimizing financial loss due to motor failure. This work focuses on the development of an efficient and reliable stator winding temperature estimation scheme for small to medium size mains-fed induction machines. The motivation for the stator

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Dbeiss, Mouhannad. "Mission Profile-Based Accelerated Ageing Tests of SiC MOSFET and Si IGBT Power Modules in DC/AC Photovoltaic Inverters." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT020/document.

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Dans le cas des installations photovoltaïques, l’onduleur est le premier élément défaillant dont il est difficile d’anticiper la panne, et peu d’études ont été faites sur la fiabilité de ce type de convertisseur. L'objectif de cette thèse est de proposer des outils et méthodes en vue d'étudier le vieillissement des modules de puissance dans ce type d'application en se focalisant sur les phénomènes de dégradation liés à des aspects thermomécaniques. En règle générale, le vieillissement accéléré des modules de puissance est effectué dans des conditions aggravées de courant (Cyclage Actif) ou de

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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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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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Chen, Shaotang. "A new approach to motor condition monitoring in induction motor drives." 1993. http://catalog.hathitrust.org/api/volumes/oclc/32712447.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1993.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 76-80).

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Lin, Chia-Min, and 林家民. "Implementation of an Induction Motor Condition Monitoring Platform." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/24909969951520718231.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>103<br>As the growth of automated industrial technologies, the level of industrial automation technology has been increasing day by day. Motors have played the main role of safe operation for electrical equipments. Thus, normal motor equipment operation will directly influence the operations of various factories. However, unexpected motor malfunction will cause factory operations to cease, which results in severe financial losses and even operator safety hazard. Traditional motor equipment is maintained by periodic time-based scheduling through motor detachment and c

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Liang, Jiu-Jenq, and 梁居正. "Monitoring and Control for a Brushless DC Motor." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/66676278396135366345.

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碩士<br>國立中興大學<br>機械工程學系<br>86<br>In this thesis, we study monitoring and control for abrushless direct current motor (BLDCM) using a modified genetic algorithm (MGA). The MGA has combined a simplegenetic algorithm that includes operations of reproduction,cross-over and mutation with techniques of gene-immigration,gene-extinction and elitist to become a more efficient methodfor parameter search. This MGA is used to identify the valuesof the system parameters of a BLDCM first. Then a controlle

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Ramakrishan, K. M. "Detection of induction motor bearing faults using condition monitoring tchniques." Thesis, 2007. http://localhost:8080/xmlui/handle/12345678/4513.

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Choi, Seungdeog. "Robust Condition Monitoring and Fault Diagnosis of Variable Speed Induction Motor Drives." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8726.

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The main types of faults studied in the literature are commonly categorized as electrical faults and mechanical faults. In addition to well known faults, the performance of a diagnostic algorithm and its operational reliability in harsh environments has been another concern. In this work, the reliability of an electric motor diagnosis signal processing algorithm itself is studied in detail under harsh industrial conditions. Reliability and robustness of the diagnosis has especially been investigated under 1) potential motor feedback error; 2) noise interference to a diagnosis-relevant system;

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Huang, Ching-Fu, and 黃清福. "Motor oil condition monitoring using wavelet transform and neural network techniques." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/53y5k2.

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碩士<br>國立彰化師範大學<br>車輛科技研究所<br>102<br>This paper describes a motor oil condition monitoring system that uses wavelet transform and neural network techniques. Motor oil deterioration is one of the main causes of serious combustion engine damage. Lubricant oils are used extensively for reducing friction in mechanical moving parts. Lubricant oils reduce mechanical wear damage. Motor oil has different lubrication effects on mechanisms in various conditions of deterioration. Mechanical moving parts will produce different sound characteristics in different states of wear. Gear noise characteristics ar

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Araújo, João Pedro Ferreira. "Condition Monitoring of Motor Bearing Faults with Vibration and Current Signals." Master's thesis, 2017. https://hdl.handle.net/10216/107014.

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Araújo, João Pedro Ferreira. "Condition Monitoring of Motor Bearing Faults with Vibration and Current Signals." Dissertação, 2017. https://hdl.handle.net/10216/107014.

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廖志乾. "A Study of LabVIEW-Aided in DC Motor Speed Monitoring System." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/43844641998724842321.

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碩士<br>國立海洋大學<br>機械與輪機工程學系<br>88<br>This thesis presents a LabVIEW-aided PID controller designed to monitor DC motor speed. First, we scheme the hardware of PC counter to read out the pulses from encoder and acquired by the DAQ card to PC. By the LabVIEW-aided PID controller, the parameters , and are adjusted to control the motor speed. Meanwhile, the front panel will display the rpm, torque, power and response curve on the screen. The simulation results are quite match with the theoretical prediction for the behavior of the PID controller.

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Lin, Chih-Yi, and 林芝以. "Study on Induction Motor Condition Monitoring and Fault Diagnosis Using Electrical Signals." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/c4j73q.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>106<br>With the progress of science and technology, motors have been widely used in various fields. About the maintenance of motors, most factories adopt the strategy of regular checking. Although it can reduce the occurrence of critical failure, it still can't find the potential deterioration of motor immediately. It also consumes lots of labor force and expense. Therefore, if the fault symptom can be detected in advance, the maintenance personnel can arrange some inspection as soon as possible. There are many benefits including to reduce the influence when motors b

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Breedt, Petrus Gerhardus. "The condition monitoring of the passive harmonic filters in rail way DC sub stations." Thesis, 2013. http://hdl.handle.net/10539/12412.

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The condition monitoring of the passive 12th and 24th harmonic filters in the DC sub station employing 12 pulse passive rectification plays the vital role of suppressing generated harmonics. The railway service of South Africa (Transnet) is confronted by the introduction of complex loads the sub stations was never designed for. In recent years the suppression of harmonics has become increasingly important due to penalties incurred from the energy supplier and the influence harmonics has on sensitive equipment supplied from the same grid. The condition monitoring of harmonic filters can thus b

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Zhu, Yi-Zhi, and 朱益志. "The development of an automatic approach for condition monitoring of induction motor bearing." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/02674124262099279481.

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碩士<br>高苑科技大學<br>機械與自動化工程研究所<br>97<br>Induction motors are the "workhorse" of modern industry. In order to prevent the occurrence of faults of the induction motor, therefore, the primary aim of this research is to development of an automatic approach to condition monitor of motor bearing with support vector machine (SVM). The bearing conditions concerned here are the normal bearing, the faulty outer race bearing and faulty inner race bearing. The time series and frequency domain approaches are used to analyze the measured vibration signal generated by the bearings. At the same time, five statis

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Huang, Yu-long, and 黃玉龍. "Development of an On-line Motor Condition Monitoring System using Electrical Signal Analysis." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/76146309531935909818.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>101<br>With the development of technology and the increased demand for living quality, the application of motorized equipment has become increasingly prevalent and widespread, and the unit capacity for such equipment has continued to improve. However, motor failure not only results in physical damage to the motor, but can also hinder the operations of the entire system when the failure severity forces motor shutdown, consequently causing the collapse of production lines, enormous financial losses, and other disastrous outcomes. Thus, a means to monitor the operating

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Chen, Chung-Yi, and 陳俊毅. "Development of a Motor-Cloud System with Condition Monitoring and Fault Diagnosis Capability." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/a8uxud.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>106<br>Nowadays, with the advent of the internet of things, more and more industries want to do the function of the equipment networking, so this study combines the function of the Internet of things and cloud computing,monitoring the motor running state at any time. In the early stage of motor failure, through the cloud analysis of motor fault symptoms. According to the severity of the fault as soon as possible to arrange the corresponding maintenance strategy, to avoid the accident caused by accidents or put too much maintenance costs, to achieve predictive mainten

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Bakhri, Syaiful. "Detailed investigation of negative sequence current compensation technique for stator shorted turn fault detection of induction motors." Thesis, 2013. http://hdl.handle.net/2440/83536.

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Online condition monitoring is preferred specifically in critical induction machines for timely analysis of their health and to predict any incipient failures. Negative sequence current monitoring is one of the well-known condition monitoring applications that capable of identifying stator faults in induction motor as well as producing fast and reliable results using a simple measurement technique. However, the technique is sensitive to asymmetrical sources of negative sequence, not only due to motor faults but also due to the disturbances such as sensor calibration, inherent non-idealities (s

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Innes, AG. "Condition monitoring of induction motors : The detection of broken rotor bars in variable speed induction motor devices." Thesis, 1999. https://eprints.utas.edu.au/18517/1/Whole-Innes-thesis.pdf.

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The squirrel cage induction motor is the most common means of converting electrical energy to mechanical energy. As such they form a very important part of modem industrial plants. Adverse service conditions may cause faults to develop within a motor that eventually result in the motor failing. If warning of an impending failure can be obtained, the motor can be scheduled for repair or replacement before catastrophic failure occurs, thus avoiding costly excess downtime of plant. A fault which occurs in cage induction motors, is where a fracture occurs between the end ring and a rotor b

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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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Shyang-AnFang and 方祥安. "Design and Implementation of Fault-Diagnosis and Monitoring Platform for Wireless Sensor Network-Aided Brushless DC Motor Drives." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/51606486347266083076.

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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>100<br>This thesis presents the fault-diagnosis scheme and hardware architecture for brushless DC motor drives. Different from most complicated fault diagnosis algorithms, this thesis proposes a compact fault-diagnosis algorithm through the observation of electrical characteristics of the motors. By employing this algorithm, it not only reduces the computation time of fault detection, but also decreases the investment cost of hardware circuits. In this proposed hardware scheme, microprocessor control chip serves as the core of the system, by which the peripheral d

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Holmgren, Fredrik. "Damper Winding Fault Detection in Synchronous Machines." Thesis, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-307503.

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This thesis aims to identify methods for detection of damper winding faults in synchronous machines (SMs) powered by variable frequency drives (VFDs). The problem of failing damper windings has received attention after reports of serious damage which have been discovered during maintenance checks. Since SMs often are used for critical applications, failures can be devastating if they cause total breakdowns. Also, VFDs are believed to cause additional stress in the damper windings of SMs and since the utilisation of VFDs is increasing, the problem is expected to become more common in the future

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