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Dissertations / Theses on the topic 'Single-phase'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Gurunlu, Cemil. "Single-phase operations of three-phase generators." Thesis, Loughborough University, 1986. https://dspace.lboro.ac.uk/2134/32922.

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The ever-increasing demand for power, and the correspondingly greater complexity of power systems, is leading to more severe problems of system reliability. Modern society is so dependent on the usage of electrical power that even a short interruption of service can cause serious problems. A public utility cannot be expected to provide a perfect power supply, since many of the possible causes of a power disturbance are beyond its control. The windings of small diesel-driven three-phase generator sets are often capable of being connected in either a zig-zag or an Edison-delta arrangement, to pr

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2

Yunus, Haroon Iqbal. "Single phase active power filters." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/13282.

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3

Reddy, M. A. "Single phase heat transfer enhancement." Thesis, University of Manchester, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616903.

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This thesis presents investigations into the enhancement of heat transfer inside tubes using HiTRAN® tube inserts manufactured by Cal Gavin Ltd. The applicability of heat transfer enhancement in vertical thermo syphon reboilers was investigated using a computer simulation. In vacuum operation, reboilers can have a significant subcooled length (as high as 60 % of the tube length). Heat transfer coefficients in this region are lower than in the two-phase region. Using tube inserts, an increase is made in the heat transfer rate occurring in the sub-cooled region and, a corresponding increase in t

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4

Magozore, Caxton. "DSP phase angle controlled three phase to single phase uninterruptible power supply." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/5177.

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5

Garber, Edward Martin. "Surface acoustic wave single-phase unidirectional transducers and phase weighting." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15225.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1985.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.<br>Bibliography: leaves 245-253.<br>by Edward Martin Garber.<br>Ph.D.

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6

Xue, Jing. "Single-phase vs. Three-phase High Power High Frequency Transformers." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/32919.

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This thesis proposes one comparison methodology for single and three-phase high power high frequency transformers in power conversion systems. The objective is to compare the volume of the transformers. And single and three-phase Dual Active Bridge Converter (DAB1 and DAB3) topologies with single and three-phase isolating transformers are selected for the transformer comparison. Design optimization of power transformer has been studied and simplified models have been built for the single and three-phase transformer design optimization in this work, including assumptions for core shapes, materi

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7

Beber, DG. "DSP controlled three phase to single phase uninterruptible power supply." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/5244.

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Includes bibliographical references.<br>With the increase in use of electronic equipment such as personal computers, network stations and AC drive conrollers, an increased "polution" of the AC mains has resulted in the form of unwanted harmonics generated by the switching currents associated with these devices. Combined with the problem of mains "pollution" is the problem of balancing a large number of single phase loads onto a three phase supply, such as in a large computer network. This has resulted in more frequent supply voltage failure, causing substantial data and financial loss and in t

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8

Stihi, Omar. "Single phase controlled current PWM converter." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63844.

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9

Wong, Kwan Butt Albert. "Aspects of single-phase motor performance." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390215.

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10

Blewitt, Warren. "Improvements to Single Phase Grid Connected Inverters." Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506423.

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11

Salamah, Ahmed Mohamed Abdelaziz. "Parallel operated, grid connected, single-phase inverters." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501881.

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12

Mills, Carlo Juan. "Supply-friendly single phase uninteruptible power supply." Master's thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/16095.

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Includes bibliography.<br>Uninterruptible power supplies (UPS) maintain a constant supply of power to a critical load. The distinguishing features are a fixed voltage and frequency, low harmonic content and the ability to supply the load for a period of time after the incoming supply has failed. The document begins by identifying the typical power-line disturbances and their effect on various types of equipment. Together with the power conditioners used to suppress these disturbances, various UPS standby, line-interactive and on-line configurations are introduced. Next, the possibility of modi

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13

Kumar, Rajiv. "Programmed harmonic reduction in single phase and three phase voltage-source inverters." Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1178302407.

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14

Gundersen, Bjørnar. "An investigation on gridconnectable single phase photovoltaic inverters." Thesis, Norwegian University of Science and Technology, Department of Electrical Power Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9108.

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<p>Several inverter topologies for use with power conditioning of photovoltaic modules were investigated with both national and international requirements in mind, as well as also practical challenges and the ability to be user friendly for ordinary people. A good inverter topology should also be low cost, have a high efficiency and have a good output power quality. In addition several filter possibilities was investigated, and it was concluded that the LCL-filter was the best for the given conditions, since it attenuated the unwanted frequencies the best with relative small filter parameters.

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15

Botne, Kjetil Kandal. "Modeling wax thickness in single-phase turbulent flow." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19307.

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Oil and gas transport is today a vital part of the industry. Oil cooled during transport in pipelines may precipitate paraffin wax. Precipitated wax may deposit on pipe walls and cause flow restrictions. Deposition models are used to understand and predict deposition of solids. A deposition model can help predict wax problems before a pipe line is set into operation. If the amount of deposited wax is predicted it can help operators to develop removal plans and strategies. A total of 21 wax deposition experiments performed by others were digitized and evaluated. The logarithmic deposition-relea

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16

Remley, Timothy J. "Single-phase heat transfer in a trapezoidal channel." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/22212.

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17

Jenkinson, Graeme Craig. "The design of single-phase switched reluctance motors." Thesis, University of Leeds, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405002.

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18

Chaturvedi, Praveen. "Single phase multicomponent flow simulation in porous media." Ann Arbor, Mich. : ProQuest, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3307176.

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Thesis (Ph.D. in Applied Mathematics)--S.M.U.<br>Title from PDF title page (viewed Mar. 16, 2009). Source: Dissertation Abstracts International, Volume: 69-04, Section: B, page: 2354. Adviser: Zhangxin Chen. Includes bibliographical references.

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19

Montoya, Higinio Ariel. "Protection Against Ungrounded Single Phase Open Circuit Faults in 3-Phase Distribution Transformers." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1869.

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This thesis explores the impacts and behavior of 3-phase distribution transformers when subject to ungrounded single phase open circuit faults. A simple 3-phase system is modeled using MATLAB Simulink and operation under fault conditions are simulated and studied. Simulation results are confirmed via lab experimentation. Finally, a robust detection and protection method using neutral current injection (as proposed in industry literature) is built and demonstrated. Electric utility operating experience has demonstrated that all too often, loads on 3-phase distribution transformers are not adequ

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Thacker, Timothy Neil. "Phase-Locked Loops, Islanding Detection and Microgrid Operation of Single-Phase Converter Systems." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/29281.

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Within recent years, interest in the installation of solar-based, wind-based, and various other renewable Distributed Energy Resources (DERs) and Energy Storage (ES) systems has risen; in part due to rising energy costs, demand for cleaner power generation, increased power quality demands, and the need for additional protection against brownouts and blackouts. A viable solution for these requirements consists of installation of small-scale DER and ES systems at the single-phase (1Î¦) distribution level to provide ancillary services such as peak load shaving, Static-VAr Compensation (STATCOM),

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21

Fajemidupe, Olawale Taye. "Effect of particle size on sand deposition in single-phase and multi-phase pipelines." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/12325.

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Sand production in the life of oil and gas reservoirs is inevitable, as it is co- produced with oil and gas from the reservoirs. Sand deposition in petroleum pipelines poses considerable risk to the production of oil and gas. This study investigates the effect both of sand particle diameter and concentration on minimum transport conditions in single phase and multiphase horizontal pipelines through experimental methods. This study defines the minimum transport condition (MTC) for sand grains under stratified two-phase flow regimes, as the combined minimum gas and liquid velocities at which all

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22

Bodnar, Nathan. "Phase-locking Stability of a Quasi-single-cycle Pulse." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5606.

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There is increasing interest in the generation of very short laser pulses, even down to attosecond (10-18 s) durations. Laser systems with femtosecond pulse durations are needed for these applications. For many of these applications, positioning of the maximum electric field within the pulse envelope can affect the outcome. The peak of the electric field relative to the peak of the pulse is called the Carrier Envelope Phase (CEP). Controlling the position of the electric field becomes more important when pulse duration approaches single-cycle. This thesis focuses on the stabilization of a qua

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23

Krawczyk-Becker, Martin [Verfasser]. "Phase-Aware Single-Channel Speech Enhancement / Martin Krawczyk-Becker." München : Verlag Dr. Hut, 2016. http://d-nb.info/1122524986/34.

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MATTOS, MARCOS ANDRE DA FROTA. "CORONA EFFECTS NUMERICAL SIMULATION IN SINGLE PHASE TRANSMISSION LINES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1985. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=14021@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>LABORATÓRIO NACIONAL DE COMPUTAÇÃO CIENTÍFICA - CNPQ<br>Uma análise teórica, comparativa e de sensibilidade é feita com quatro modelos básicos para o efeito corona em linhas de transmissão monofásicas. A análise de ocorrência de choque em linhas de transmissão é também considerada na análise os modelos. Um algoritmo computacional é desenvolvido para estudo de transitórios eletromagnéticos em linhas de transmissão monofásicas. Por fim são analisados casos interessantes do ponto de vista da Engenharia Elétrica.<br>The corona effect

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25

Shin, Taeho. "Photoinduced phase transitions studied by femtosecond single-shot spectroscopy." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62103.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2010.<br>Vita. Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 221-228).<br>Single-shot femtosecond spectroscopy has been developed and employed for the study of phase transitions of solid-state materials. Using two crossed echelons, a two dimensional spatial delay gradient was generated across a single probe pulse profile. This novel scheme enables us to monitor irreversible change in solids by acquiring many time-resolved data points with a single laser pulse. With the integration wit

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26

Chen, Tsu-Kung, and 陳賜恭. "Analyses of Single-Phase Induction Generators and Single-Phase Induction Motors." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/4n85uz.

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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>90<br>This thesis investigates the important performance of a single-phase, 110/220-V, 4-pole, 1/3-hp induction machine under two different operation modes, i.e., a single-phase induction motor (SPIM) mode and an isolated single-phase self-excited induction generator (SPSEIG) mode. In SPIM mode, the FLUX2D simulated software, which is widely employed for analyzing flux, heat, and transient characteristics, and the d-q axis SPIM equivalent-circuit model are both utilized to simulate the characteristics of a SPIM. The experimental results are compared with the

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27

Chen, Guan-Ying, and 陳冠穎. "A Novel Single-stage Single-phase AC to Three-phase AC Converter." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/7dv95n.

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碩士<br>國立虎尾科技大學<br>電機工程研究所<br>100<br>This thesis proposes a novel single-stage single-phase AC to three-phase AC converter. Based on a zero vector technique, the proposed converter combines a single-phase full-bridge with three-phase full-bridge to form a single-stage circuit structure. The converter has unity power factor and sinusoidal input current in input side. Adjustable amplitude and frequency of three-phase current source are in output side. The proposed converter consists of eight power switches, one capacitor, one boost inductor and three output inductors. It’s worth mentioning that t

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28

Lu, Wei-Tso, and 盧唯佐. "Single-Phase/Three-Phase Power Conversion System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/w6edtd.

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碩士<br>崑山科技大學<br>電機工程研究所<br>96<br>In this thesis, a single-phase/three-phase power conversion system is developed. The single-phase/three-phase power conversion system is configured by a three-phase four-wire power converter, a zero-sequence transformer set and a filter capacitor. The single-phase/three-phase power conversion system is applied to the single-phase distribution power system to perform a three-phase power conditioner. The current-mode control is applied to control the three-phase four-wire power converter so as to generate a positive-sequence current and a zero-sequence current. T

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29

Yao-hui, Wang, and 王耀輝. "Three-Phase/Single-Phase Power Conversion System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/15613927553968646833.

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碩士<br>崑山科技大學<br>電機工程研究所<br>95<br>In this thesis, a three-phase/single-phase power conversion system is developed. The three-phase/single-phase power conversion system is configured by a power converter, a zero-sequence transformer set and a filter capacitor. The three-phase/single-phase power conversion system can be applied to the three-phase distribution power system to perform a single-phase power conditioner. In this application, the three-phase/ single-phase power conversion system absorbs a real power from the three-phase distribution power system, and it will perform the functions of th

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30

Nesbitt, James William. "A novel single phase to three phase converter." 1990. http://catalog.hathitrust.org/api/volumes/oclc/23057889.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1990.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf 67).

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31

Nien, Hung-Shou, and 粘紘壽. "Single-Phase Active Power Filters." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/16011375951715284478.

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博士<br>國立中正大學<br>電機工程所<br>94<br>The objective of this dissertation is to develop single-phase two-wire (1f2W) inverter systems for achieving active power filtering. The proposed active power filters (APFs) can be used to filter harmonic currents, compensate reactive power, improve power factor, and par-tially deal with the reactive and harmonic power. They can take into account the nonlinear ef-fect of a filter inductor, and can be modualized into a parallel-APF system. In the dissertation, a voltage-source full-bridge inverter is adopted to serve as the power stage of the discussed APFs. In an

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32

Shields, Bradley J. "Single-Phase Turbulent Enthalpy Transport." 2014. https://scholarworks.umass.edu/masters_theses_2/113.

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Vapor generation is central to the flow dynamics within fuel injector nozzles. Because the degree of atomization affects engine emissions and spray characteristics, quantification of phase change within diesel fuel injectors is a topic of design interest. Within the nozzle, the large pressure gradient between the upstream and downstream plena induce large velocities, creating separation and further pressure drop at the inlet corner. When local pressure in the throat drops below the fluid vapor pressure, phase change can occur with sufficient time. At the elevated temperatures present in diesel

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33

Bala, Sandeep. "Integration of single-phase microgrids." 2008. http://www.library.wisc.edu/databases/connect/dissertations.html.

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(5930573), Sriharsha Challa. "Numerical Methods for Single-phase and Two-phase Flows." Thesis, 2019.

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<div>Incompressible single-phase and two-phase flows are widely encountered in and underlie many engineering applications. In this thesis, we aim to develop efficient methods and algorithms for numerical simulations of these classes of problems. Specically, we present two schemes: (1) a modied consistent splitting scheme for incompressible single-phase flows with open/out flow boundaries; (2) a three-dimensional hybrid spectral element-Fourier spectral method for wall-bounded two-phase flows.</div><div><br></div><div><div>In the first part of this thesis, we present a modied consistent splitti

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35

Shen, Sheng-Yong, and 沈聖詠. "A Novel Single Stage Single Phase Step up/down Inverter." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/55011432217236195734.

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碩士<br>國立清華大學<br>電機工程學系<br>90<br>Inverters are widely used in various applications. However, traditional inverter configuration basically belongs to a step/down topology. In other words, the maximum peak voltage of the output AC voltage is limited to the input DC voltage. Hence, in case a higher output voltage is needed, it is necessary to either cascade one more stage of step/up CD converter or add an step/up transformer. This will, of course, result in larger size, lower efficiency and higher cost. In view of there, it is the main objection of this thesis to develop a single stage step up/dow

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36

ZHENG, ZHEN-CHENG, and 鄭振成. "Single-phase AC passive filter design." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/29375859254576071789.

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37

HSIN-HUNG, CHEN, and 陳信宏. "True Single-phase Adiabatic Circuit Techniques." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/32088148628579102745.

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碩士<br>國立臺灣大學<br>電機工程學研究所<br>90<br>This thesis reports a circuit technique to improve the performance of true single-phase adiabatic circuitry. In chapter 2, the principles of adiabatic and non-adiabatic charging/discharging is introduced. Several conventional adiabatic circuit families are reviewed and analyzed with discussion about their advantages and disadvantages. In chapter 3, the first ever true single-phase adiabatic circuit family is reviewed and analyzed. Improved true single-phase adiabatic circuit is proposed by utilizing bootstrapped switch technique. By HSPIC

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38

Wu, Chun-Wei, and 吳俊緯. "Study of Single-Phase Cascaded Inverters." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/67700580896255992422.

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博士<br>雲林科技大學<br>工程科技研究所博士班<br>97<br>The objective of this dissertation is to develop single-phase cascaded inverters with three H-bridge inverter modules. The proposed cascade inverter features include: 1) the method of conducting angles; 2) the separate DC voltages discharge balance control and 3) predictive current control. The multilevel inverter synthesizing the output voltage with step pulses produces output voltages with less harmonic distortion. The conducting angles of switches in the conventional cascaded multilevel inverters are obtained by the use of Fourier series to minimize the

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Chu, Yung-Ching, and 朱勇青. "Toward Single Element Phase-change Memory." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/19395081395349936510.

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Lazar, James Frederick. "Analysis of single phase rectifier circuits." Thesis, 1997. https://thesis.library.caltech.edu/172/1/Lazar_jf_1997.pdf.

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The preponderant application of rectifier circuits is the powering of dc loads from the ac utility line. Ordinary rectifier circuits present a nonlinear load impedance to the utility line, thereby generating harmonic currents, and contributing to the harmonic current problem. There are many active and passive rectifier circuits offering reduced harmonic currents, and in this work a methodology is developed by which these circuits may be analyzed and compared. Rectifier circuits can be classified as either active or passive. A passive rectifier circuit contains passive components (inductors, c

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Majhi, Bijoyprakash. ""Analysis of Single-Phase SPWM Inverter"." Thesis, 2012. http://ethesis.nitrkl.ac.in/3464/1/Final025.pdf.

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This project deals with studying the basic theory of a Sinusoidal Pulse Width Modulated Inverter (SPWM), its Simulink modelling, estimating various designing parameters and various instabilities. The project will be commenced by a basic understanding of the circuitry of the SPWM Inverter, the components used in its design and the reason for choosing such components in this circuitry. After this, it will be attempted to simulate a model circuit on any simulating software e.g. MATLAB and analyse the output waveforms for various values of the elements used in the circuit and hence study the syst

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Soren, Sanjay Kumar. "Single Phase Grid Connected PV System." Thesis, 2015. http://ethesis.nitrkl.ac.in/7058/1/Single_Soren_2015.pdf.

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A single phase grid connected with a photovoltaic (PV) power system that will provide high voltage gain with state model analysis for the control of the system has been presented. First the photovoltaic system is designed and simulated using MATLAB SIMULINK software. The output voltage of a PV array is comparatively low thus high voltage gain is necessary for grid-connection and synchronization. The PV system has been provided with a boost converter which will boost the low voltage of the PV array to high dc-voltage. A steady state model is obtained and is verified with the help of simulation.

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Chung, Bing-hsueh, and 鍾秉學. "Development of Single-Phase and Three-Phase Grid-Connected Power Converters." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/n3aapn.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>99<br>This thesis is concerned with the analysis and implementation of single-phase and three-phase dc-ac power converters for grid-connection. The utility angle is used to calculate the digital phase-locked loop in the single-phase and three-phase dc-ac power converters. The controllers, which use the d-q current control modes, are performed under stationary frame, thereby yielding current and power stably to utility. In the stand-alone system, the single-phase ac voltage regulator and voltage feed-forward compensation are introduced to improve response and reduce

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Huang, Kuo-Fung, and 黃國芳. "Study of Three-Phase Input Single-Phase Output Uninterruptible Power System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/72813291767985353156.

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碩士<br>國立高雄應用科技大學<br>電機工程系<br>98<br>Three-phase four-wire distribution power systems have been widely applied in office buildings and manufacturing-office buildings to supply single-phase or three-phase loads. The uninterruptible power supply (UPS) is generally applied to supply the high quality power to the computer and precise equipment. In this thesis, three-phase input single-phase output UPS, composed of three-phase AC-DC power converter, battery set and single-phase DC-AC inverter, is addressed. Several circuit topologies and control methods, applied for the power factor correction, are a

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Huang, Wun-Liang, and 黃文良. "Analysis of Adjustable-Speed Single-Phase Induction Motor Using Phase-Controller." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/39188097808808891603.

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碩士<br>崑山科技大學<br>電子工程研究所<br>100<br>Small single-phase induction motor(SIPM) has been widely used in household appliances such as electric fans, air-conditioning units. The most common used speed control method is with mechanical switch combined with coil connections such as external transform or internal windings connection. This is based on cost considerations. Further control method uses phase control or variable voltage variable frequency (VVVF) control, respectively. The main issue of this paper is to explore the power components and efficiency of the phase-control speed process.

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Ke, Chun-Wei, and 柯雋煒. "Two−Phase and Two Single−Phase Buck Regulators with SVID Interface." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5464ns.

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碩士<br>淡江大學<br>電機工程學系碩士在職專班<br>106<br>A three-rail buck controller with Serial VID compliant IMVP8 interface is proposed in this thesis. The controller uses differential DCR current sensing and differential voltage sensing that provide accurately adaptive voltage positioning. The controller comprises a type III frequency compensator to provide high bandwidth transient response and zero current detection of synchronous rectifier to obtain higher efficiency at light load. In this thesis, the control chip NCP81226 is used to achieve the VCORE circuit control which can improve the reliability and e

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Hedayati, Mohammad Hassan. "Integrated CM Filter for Single-Phase and Three-Phase PWM Rectifiers." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3947.

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The use of insulated-gate bipolar transistor (IGBT)-based power converters is increasing exponentially. This is due to high performance of these devices in terms of efficiency and switching speed. However, due to the switching action, high frequency electromagnetic interference (EMI) noises are generated. Design of a power converter with reduced EMI noise level is one of the primary objectives of this research. The first part of the work focuses on designing common-mode (CM) filters, which can be integrated with differential-mode (DM) filters for three-phase pulse-width modulation (PWM) recti

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48

Hedayati, Mohammad Hassan. "Integrated CM Filter for Single-Phase and Three-Phase PWM Rectifiers." Thesis, 2015. http://etd.iisc.ernet.in/2005/3947.

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Abstract:

The use of insulated-gate bipolar transistor (IGBT)-based power converters is increasing exponentially. This is due to high performance of these devices in terms of efficiency and switching speed. However, due to the switching action, high frequency electromagnetic interference (EMI) noises are generated. Design of a power converter with reduced EMI noise level is one of the primary objectives of this research. The first part of the work focuses on designing common-mode (CM) filters, which can be integrated with differential-mode (DM) filters for three-phase pulse-width modulation (PWM) recti

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49

Lee, Bong-Joo. "Single Phase Pump: Non-Mechanical Valvular Conduit." Thesis, 2011. http://hdl.handle.net/10012/6323.

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This thesis evaluates performance of a non-mechanical conduit valve that was designed for the purpose of this research. The motivation came from the need for a cooling system of portable computers (e.g. laptops and netbooks). As the technology of micro-processors in portable computers advances, they will generate more heat, requiring a more effective and efficient way to cool the system. Based on this fact, a new method of heat dissipation using a single-phase liquid (i.e. water) instead of air was examined. This potentially allowed 80 times more heat dissipation, which translates to better an

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50

Hansel, Joshua Edmund. "Solution Techniques for Single-Phase Subchannel Equations." Thesis, 2013. http://hdl.handle.net/1969.1/149451.

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A steady-state, single phase subchannel solver was created for the purpose of integration into a multi-physics nuclear fuel performance code. Since applications of such a code include full nuclear reactor core flow simulation, a thorough investigation of efficient solution techniques is a requirement. Execution time profiling found that formation of the Jacobian matrix required by the nonlinear Newton solve was found to be the most time-consuming step in solution of the subchannel equations, so several techniques were tested to minimize the time spent on this task, such as finite difference a

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