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Dissertations / Theses on the topic 'Electric machinery'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2024

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1

Wang, Rong-Jie. "Design aspects and optimisation of an axial field permanent magnet machine with an ironless stator." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53351.

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Thesis (PhDEng)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: The advent of new high energy product permanent magnet materials has opened great opportunities for novel electrical machine topologies with advantageous features such as high efficiency and high power/weight ratio. Amongst others, axial field permanent magnet (AFPM) machines with ironless stators are increasingly being used in power generation applications. Because of the absence of the core losses, a generator with this type of design can operate at a substantially high efficiency. Besides, the high compactness and

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2

Cash, M. Alex. "Detection of turn faults arising from insulation failure in the stator windings of AC machines." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/15460.

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3

Burns, Angela D. "Comparison of two electrofishing gears (backpack and parallel wires) and abundances of fishes of the upper Greenbrier River drainage." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5165.

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Thesis (M.S.)--West Virginia University, 2007.<br>Title from document title page. Document formatted into pages; contains vii, 65 p. : ill., maps (part col.). Includes abstract. Includes bibliographical references.

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4

Lemmer, Edward Charles. "Wind-electric pump system design." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2527.

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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2009.<br>The aim of this study is to analyse the operation of a wind-electric pumping system (WEPS) as an alternative to conventional mechanical wind pumps for application in stand-alone water-pumping schemes. The steady-state as well as the dynamic operation of such a system is analysed. Through these analyses, practical guidelines are given in the design and sizing of the different system components to ensure efficient and reliable operation. Theoretical analyses are supported by measured results conducted o

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5

Hu, Jiangang. "Sensorless control of AC machines for integrated starter generator application." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1196258873.

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6

Stack, Jason R. "Fault signature detection for rolling element bearings in electric machines." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/13276.

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7

Zhang, Hui. "On Electric Machinery for Integrated Motor Drives in Automotive Applications." Doctoral thesis, KTH, Elkraftteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-207942.

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Compact, electric drives for automotive traction applications represent animportant enabler towards realizing tomorrow’s fossil free transport solutions.One attractive solution is to integrate the power electronic converter withits associated electric machinery into a single unit. This thesis, along withits appended papers, considers design and analysis of electric machinery forintegrated electric drives intended for automotive applications. Particular focusis put on permanent-magnet synchronous machines (PMSMs) with interiormountedpermanent magnets combined with modular converter topologies.I

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8

Qin, Ling. "A permanent-magnet switched-flux generator." abstract and full text PDF (free order & download UNR users only), 2005. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3210935.

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9

Ramsey, Jack S. "Shipboard applications of non-intrusive load monitoring." Thesis, Monterey, California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1475.

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10

Sachdeva, Rajesh. "Two-phase flow through electric submersible pumps /." Access abstract and link to full text, 1988. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9021070.

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11

Liu, Guoping. "Oscillation monitoring system based on wide area phasor measurements in power systems." Pullman, Wash. : Washington State University, 2010. http://www.dissertations.wsu.edu/Dissertations/Summer2010/g_liu_060110.pdf.

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Thesis (Ph. D.)--Washington State University, August 2010.<br>Title from PDF title page (viewed on July 23, 2010). "School of Electrical Engineering and Computer Science." Includes bibliographical references (p. 76-81).

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12

Nel, Wynand. "Impact of pole shape and proportions on flux leakage in switched-flux generators." abstract and full text PDF (free order & download UNR users only), 2005. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1433347.

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13

Tang, Yun-chung. "Motor simulation and parameter identification in a reciprocating mechanism." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10312009-020104/.

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14

Opperman, Adriaan Jacobus. "Analysis of factors influencing the performance of a hydrokinetic coil pump." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1021041.

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A hydrokinetic coil pump (HCP) is described by its name. It is a coil pump driven by the kinetic energy in flowing water. The hydrokinetic energy is converted into mechanical energy by means of a paddle-wheel. The coil pump makes up part of the paddle-wheel and together is called a HCP. The HCP floats in a stream of flowing water while tethered to the bank. The focus of the study was to identify and analyse the factors influencing the HCP. The HCP was then optimized for rural application. Data acquisition took place through experimentation on a full scale experimental platform according to a c

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15

O'Leary, Beth Andrews. "Analysis of high-speed rotating systems using Timoshenko beam theory in conjunction with the transfer matrix method /." Online version of thesis, 1989. http://hdl.handle.net/1850/10608.

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16

Liles, Howard J. "High throughput profile millling for the flexible and accelerated processing of electric steels." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47628.

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The proliferation of electric machines has drastically increased in recent years and is likely to increase into the future. This interest in the production of advanced, high power density electrical machines that are small in size has heightened the need for flexible manufacturing processes to produce their laminated components during short batch and prototyping production runs. A means of cost effective, accelerated prototyping of these machines will have a substantial impact on their design and optimization, reducing time requirements to produce and test a given design. A review of the curre

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17

Li, Chiamin. "CRM and the use of internet in Electric & Machinery industry-TECO." Thesis, University of Gävle, Department of Technology and Built Environment, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-6356.

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<p>Everyone already knows what the customer relationship management is and it has been improved and managed by the internet, called electronic customer relationship management. The information technology, such as the internet, is making it easier for customers and industries. The purpose of this study is to analyze the customer relationship management in TECO Electric & Machinery Co.,Ltd. and how this could be improved via the internet with four research questions. Additionally, the primary information was conducted by a face-to-face interview with the managing director who has empirical exper

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18

Opgenoorth, Andreas, Stefan Quabeck, Doncker Rik W. De, and Katharina Schmitz. "Challenges and possibilities of the integration of electric drives in mobile machinery." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71118.

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This paper provides an overview of the challenges and possibilities of the integration of electric drives into diesel-hydraulic excavators. Due to the drivers of emission reduction, the use of renewable energies and more energy efficient systems, a global push leads to the integration of electric drives in excavators. In mobile machinery such as excavators, new possibilities and challenges of the adaptation of the drive train and energy storage arise. Rotational actuators can be powered by direct electric drives to avoid losses of the hydraulic system. Adapted hydraulic system topologies enabl

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19

McGilp, Malcolm. "An integrated design environment for electric machines." Thesis, University of Glasgow, 2018. http://theses.gla.ac.uk/9023/.

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In this essay I describe an original and sustained contribution to the methodology of research and design of electric machines, during a period of fundamental change in the technology itself; from pen and paper methods of design to a wholly computer-based methodology. This is paralleled by an even more dramatic transformation in analytical and numerical methods in engineering. The technological changes have arisen mainly in the growth of electronics, in connection with variable speed drives but also in new magnet and other materials. The SPEED (Scottish Power Electronics and Electric Drives) L

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20

Hurst, Kevin D. "Transducerless control and monitoring of induction machines by detection of magnetic saliency harmonics." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/15713.

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21

Miri, Seyed-Mehdi. "Modeling and fault detection in electromagnetic devices : applications to synchronous machines and signal conditioning systems /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487332636476273.

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22

Lee, Seungkoo. "An architecture for a diagnostic/prognostic system with rough set feature selection and diagnostic decision fusion capabilities." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/14715.

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23

Smuts, Johan L. (Johan Leodolf). "Critical evaluation of a position sensorless control technique for the reluctance synchronous machine drive." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/70135.

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Thesis (MScEng)--University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: The aim of this study is to critically evaluate the voltage injection position sensorless control technique as applied to the reluctance synchronous machine (RSM) drive and to implement the technique on a 5.5 kW RSM and a 110 kW RSM. The technique is evaluated by using an accurate mathematical model of the RSM in a simulation package, called Simuwin. The negative effects that cross-magnetisation and the slotted air-gap have on the technique are intensively investigated. It was showed that these effects can cause an

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24

Link, Rainer. "Innovative approaches to recycling of small and electric motors from end-of-life vehicles, electric bicycles and industrial machinery." Thesis, KTH, Industriell ekologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190181.

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Recycling and recovery of materials and energy from waste is a key factor to mitigate virgin material demands and reduce resource consumption by utilising waste as a resource for new products. However, some critical materials, such as neodymium, are barely recycled because of missing information on amount and disposition of these critical materials within the waste streams. The goal of the study is to quantify recycling potentials from small and electric motors originating from end-of-life vehicles (ELV), electric bicycles and industrial machinery in Germany and the EU with focus on currently

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25

Merabet, Adel. "Commande non linéaire à modèle prédictif pour une machine asynchrone /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2007. http://theses.uqac.ca.

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Thèse (D.Eng.) -- Université du Québec à Chicoutimi, 2007.<br>La p. de t. porte en outre: Thèse présentée à l'Université du Québec à Chicoutimi comme exigence partielle du doctorat en ingénierie. Bibliogr.: f. 169-181. Document électronique également accessible en format PDF. CaQQUQ

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26

Siyambalapitiya, Don Joseph Tilak. "Investigation of cage rotor variables including on-line monitoring." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237745.

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27

Jurkiewicz, David J. (David James). "Modular machinery arrangement and its impact in early-stage naval electric ship design." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74922.

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Thesis (S.M. in Naval Architecture and Marine Engineering)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 75-77).<br>Electrical power demands for naval surface combatants are projected to rise with the development of increasingly complex and power intensive combat systems. This trend also coincides with the need of achieving maximum fuel efficiency at both high and low hull speeds. A proposed sol

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28

Hosseinpour, Amir. "An investigation into electric supercharging for emission reduction by means of engine downsizing." Thesis, City, University of London, 2018. http://openaccess.city.ac.uk/19787/.

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This thesis describes an investigation into the operation and performance of internal combustion engines boosted by an electric supercharger (eSC) in combination with a turbocharger. Engine downsizing offers one of the most effective ways to meet increasingly demanding CO2 reduction targets set for the automotive vehicles. The addition of a turbocharger has enabled significant downsizing but the loss of torque at low engine speeds remains a key barrier to further downsizing. A known solution to this problem is to additionally boost the engine using a supercharger. However, until recently, this

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29

Lee, Sang-Bin. "Sensorless stator winding temperature estimation for induction machines." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/14719.

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30

Baggu, Murali Mohan. "Advanced control techniques for doubly fed induction generator-based wind turbine converters to improve low voltage ride-through during system imbalances." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Baggu_09007dcc806684bd.pdf.

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Thesis (Ph. D.)--Missouri University of Science and Technology, 2009.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 27, 2009) Includes bibliographical references (p. 126-130).

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31

Riley, Caryn M. "Current-based sensorless vibration monitoring of small ac machines." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/13741.

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32

Halligan, Gary. "Fault detection and prediction with application to rotating machinery." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Halligan_09007dcc80708356.pdf.

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Thesis (M.S.)--Missouri University of Science and Technology, 2009.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed November 25, 2009) Includes bibliographical references.

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33

Merchant, Richard W. "Recursive estimation using the bilinear operator with applications to synchronous machine parameter identification /." Title page, contents and abstract only, 1992. http://web4.library.adelaide.edu.au/theses/09PH/09phm5543.pdf.

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34

Abrahams, Leon Gary. "Computerised speed monitoring system for nylon spinning." Thesis, Peninsula Technikon, 1996. http://hdl.handle.net/20.500.11838/1123.

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Thesis (MTech (Electrical Engineering))--Peninsula Technikon, Cape Town,1996<br>The Southern Nylon Spinning plant, at South African Nylon Spinners in Bellville - Cape Town - South Africa, is one of the oldest on the site and a need arose to upgrade the existing method used in speed monitoring in this particular plant. This system was unable to produce alarms on speed limits being exceeded (i.e. on under-speed or over-speed). There was no alarm logging or historical trending. Manual records on speed were either incomplete or non-existent. Thus the purpose of this study was to investigat

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35

So, Ting-pat Albert. "PWM-based asymmetrical rotor synchronous/industion drive /." [Hong Kong : University of Hong Kong], 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12359452.

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36

Lawler, Clinton T. "A two-phase spherical electric machine for generating rotating uniform magnetic fields." Thesis, Monterey, California. Naval Postgraduate School, 2007. http://hdl.handle.net/10945/2995.

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This thesis describes the design and construction of a novel two-phase spherical electric machine that generates rotating uniform magnetic fields, known as a fluxball machine. Alternative methods for producing uniform magnetic fields with air-cored solenoidal magnets are discussed and evaluated. Analytical and numerical models of these alternatives are described and compared. The design details of material selection, slot geometry, and mechanical connections are described for the fluxball machine. The electrical properties of the machine are predicted and measured. Based on these properties, t

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37

Sitsha, Lizo M. M. "Design of tapered and straight stator pole switched reluctance machines." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51678.

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Thesis (MEng)--University of Stellenbosch, 2000.<br>ENGLISH ABSTRACT: This thesis deals with the design and optimisation of medium power traction switched reluctance machines with tapered and straight stator poles. Only the prototype of the tapered stator pole machine is constructed and evaluated in this study. A non-commercial finite element package is used in the design and optimisation of the machines. The finite element method is applied directly in the optimisation procedure to optimise the design of the machines in multi-dimensions. The lumped circuit analysis method is used only

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38

Duan, Yao. "Method for design and optimization of surface mount permanent magnet machines and induction machines." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37280.

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Advances in electrical machinery with high efficiencies could significantly reduce the cost of industrial and residential energy systems, thereby reducing fossil fuel needs and emissions. Electrical machine design is a comprehensive process based on several factors, including economic factors, material limitations, specifications and special application-dependent factors. At the same time, machine design is a multi-physics task comprising of electric design, magnetic design, insulation design, thermal design and mechanical design. However, the out-of-date conventional machine design can neithe

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39

Wai, Lo-kau. "Microprocessor-based field-oriented control of a synchronous motor drive using a three-phase solid-state sinusoidal current source /." Hong Kong : University of Hong Kong, 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12434425.

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40

Peqquena, Suni Juan Carlos. "Sobre a determinação de parametros de geradores sincronos para estudos de comportamento dinamico de sistemas eletricos." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258997.

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Orientador: Ernesto Ruppert Filho<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-15T03:55:20Z (GMT). No. of bitstreams: 1 PeqquenaSuni_JuanCarlos_M.pdf: 1533933 bytes, checksum: dbd348c759114d83f69069e35635591c (MD5) Previous issue date: 2009<br>Resumo: Os parâmetros do modelo matemático dinâmico dos geradores síncronos como a resistência elétrica dos enrolamentos de estator por fase, a resistência elétrica do enrolamento de campo, as resistências elétricas dos enrolamentos amortecedores d

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41

韋盧溝 and Lo-kau Wai. "Microprocessor-based field-oriented control of a synchronous motor drive using a three-phase solid-state sinusoidal current source." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31208940.

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42

Seyoum, Dawit Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "The dynamic analysis and control of a self-excited induction generator driven by a wind turbine." Awarded by:University of New South Wales. School of Electrical Engineering & Telecommunications, 2003. http://handle.unsw.edu.au/1959.4/22008.

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This thesis covers the analysis, dynamic modelling and control of an isolated selfexcited induction generator (SEIG) driven by a variable speed wind turbine. The voltage build up process of an isolated induction generator excited by AC capacitors starts from charge in the capacitors or from a remnant magnetic field in the core. A similar voltage build up is obtained when the isolated induction generator is excited using an inverter/rectifier system with a single DC capacitor on the DC link of the converter. In this type of excitation the voltage build up starts from a small DC voltage in the D

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43

Lee, Yongsik. "A study of parametric excitation applied to a MEMS tuning fork gyroscoe." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4697.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on November 29, 2007 Vita. Includes bibliographical references.

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44

Wung, Peter Yu-Pu. "Operating point dependent modeling of synchronous reluctance motors and its implication on vector controlled motor performance." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/15042.

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45

Brown, Daniel F. Jr. "Single crystal piezoelectric pumping using displacement amplification." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/19124.

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46

So, Ting-pat Albert, and 蘇廷弼. "PWM-based asymmetrical rotor synchronous/industion drive." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31208903.

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47

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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48

Gao, Yuan, and 高源. "Control of chaos in advanced motor drives." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B45014784.

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49

Grubic, Stefan. "Online monitoring of turn insulation deterioration in mains-fed induction machines using online surge testing." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41131.

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The development of an online method for the early detection of a stator turn insulation deterioration is the objective of the research at hand. A high percentage of motor breakdowns is related to the failure of the stator insulation system. Since most of the stator insulation failures originate in the breakdown of the turn-to-turn insulation, the research in this realm is of great significance. Despite the progress that has been made in the field of stator turn fault detection methods, the most popular and the best known ones are still limited to the detection of solid turn faults. The time sp

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50

Tallam, Rangarajan M. "Current-based sensorless detection of stator winding turn faults in induction machines." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/13429.

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