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Rozprawy doktorskie na temat „Electric current converters – Computer simulation”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 31 lipca 2025

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1

Skowronn, Dietmar Reinhard. "Simulation of Switched Linear Networks." PDXScholar, 1993. https://pdxscholar.library.pdx.edu/open_access_etds/4644.

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This thesis deals with the time-domain analysis of switched linear networks and investigates inherent problems which have to be considered when analyzing this class of networks. Computer simulation requires the use of numerical methods and we focus on the transmission -line modelling technique (TLM) and the numerical inverse Laplace transform. A general approach based on the one-graph modified nodal description is given which allows the formulation of circuit equations of a TLM-modelled circuit by inspection. The numerical equivalence of TLM and trapezoidal rule has been found and a proof is g

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2

Twining, Erika. "Voltage compensation in weak distribution networks using shunt connected voltage source converters." Monash University, Dept. of Electrical and Computer Systems Engineering, 2004. http://arrow.monash.edu.au/hdl/1959.1/9701.

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Legesse, Michael. "Coupled simulation of an indirect field oriented controlled induction motor drive." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116014.

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Conventionally, system simulations of induction motor drives use lumped parameters model of the motor. This approach assumes motor parameters to be constant during the entire operation of the drive. Unfortunately, these are known to vary significantly over the operating range of the motor due to factors such as magnetic saturation, skin effects, and operating temperature. The variations in motor parameters affect motor output and control parameters resulting in degraded drive performance. One way of overcoming this problem is by coupling the field model of the induction motor with the drive si

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4

Ebner, Melisa Ann 1957. "Analysis and simulation of DC to DC converters." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276896.

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An overview of DC/DC converters is given. The operation of the buck converter and the series resonant converter is explained. The advantages and disadvantages of series, parallel, and series-parallel resonant circuits are examined. In addition, the advantages and disadvantages of the clamped series resonant converter when compared to the buck converter are discussed. Both circuits are simulated on the general circuit simulation program SPICE. Lab measurements taken for the series resonant converter are compared to the simulated results from SPICE.

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5

Kagalwala, Raxit A. "Modeling and simulation of custom power devices /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/5962.

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Yang, James Ji. "Computer-aided design and analysis of series resonant converters." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/80127.

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A software program was developed to facilitate the design and analysis of a series resonant converter. Using the program, the values of the inductor and capacitor of the resonant tank can be easily determined to meet design specifications. Following the design, a dc analysis is performed to determine such salient parameters as peak inductor current and peak capacitor voltage. The program is user-friendly with graphic capabilities and is written for the IBM-PC.<br>Master of Science

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7

Souza, Junior Rodolfo Renato de. "Modelo de IGBT para um conversor CC-CC de 1000A usado em controle de motores de tração de locomotivas diesel-elétricas." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2854.

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O presente trabalho tem por objetivo o desenvolvimento de um modelo analógico dinâmico do IGBT 2MBI1200U4G-170 para simulação SPICE para a análise de tempos de comutação, perdas e corrente de carga. Este desenvolvimento foi motivado pelo fato de não se dispor de modelos prontos para IGBT para faixas de tensão e corrente na ordem de kV e kA, destinado ao projeto de um conversor CC para controle de motores de tração em locomotivas diesel-elétricas. Como parte do processo se fez uma tentativa de modificação do modelo padrão de IGBT da plataforma Cadence Orcad 16.5, baseada nos trabalho de Hefner,

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8

Richards, Coneth Graham. "Optimal control of matrix converters under distorted and unbalanced supply conditions." Thesis, Versailles-St Quentin en Yvelines, 2013. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000603.

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D. Tech. Electrical Engineering.<br>A matrix converter is a forced commutated converter which uses an array of controlled bi-directional switches as the main power processing elements to create a variable voltage system with unrestricted frequency. It does not contain any DC link circuit and does not require any large energy storage elements. The output frequency is theoretically infinitely variable as opposed to cyclo-converters. This study will evaluate present modulation techniques for matrix converters. Chapter 2 will review the present direct and indirect modulation techniques for Matrix

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9

Rajarathnam, Ramkumar. "A computer-aided graphic design tool for minimum weight inductors in switching converters." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45912.

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<p>A computer-aided design procedure has been developed to determine the minimum weight design solutions, for singly wound EE- and EI-cored inductors that perform the functions of energy storage and transfer in switching DCÂ·DC power converters. Three converter topologies, namely the Buck, the Boost, and the Buck/Boost have been considered in implementing the closed form Lagrange Multiplier-based solution to the design problem.</p> <p>A notable feature is the interactive use of design graphs to facilitate a trade-off study between the weight of the inductor, the total losses in the indu

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10

Niu, Weihe. "Exact Modeling of Time-Interval-Modulated Switched Networks." PDXScholar, 1993. https://pdxscholar.library.pdx.edu/open_access_etds/4622.

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The frequency response analysis of switched networks plays a very important part in designing various kinds of power converter circuits. In this thesis two frequency response techniques for analyzing switching power converters are discussed. One method provides a mathematical description which treats the converter as a periodic time varying system. A linearized small signal model is subsequently derived. The major part of the thesis concentrates on this accurate exact small-signal technique. The derivation involves state space representation and the use of the time varying transfer function. A

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11

Ansari, Fardin. "Circuit Modeling of Switched Linear Networks." PDXScholar, 1994. https://pdxscholar.library.pdx.edu/open_access_etds/4658.

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The use of switched linear networks is prevalent in power processing systems such as dc-to-dc power converters. These converters provide regulated dc output power and are widely used in the power supplies for computers and peripherals. As with most systems where high performance is a criterion, the power converter is usually enclosed in a feedback loop. Feedback design usually entails the use of small signal (linear) models with linear feedback design techniques. There exists a large number of small signal models, but most of them are ad hoc. A describing function approach has previously been

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12

Dalvi, Mahesh. "Computer controlled generation of PWM waveform using harmonic distortion minimization scheme." Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1177442328.

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13

Tonon, Thiago. "Controle neural aplicado a um conversor boost utilizado em aerogeradores de baixa potência." Universidade Tecnológica Federal do Paraná, 2014. http://repositorio.utfpr.edu.br/jspui/handle/1/1212.

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Fundação Araucária<br>Este trabalho apresenta o estudo, projeto e simulação de um conversor CC boost, com controle da tensão de saída utilizando redes neurais. O conversor boost estudado neste trabalho está sendo utilizado em um aerogerador de baixa potência, com potência máxima de 3kW. Devido à operação em velocidade variável do aerogerador, a tensão de entrada no conversor também é variável em uma ampla faixa de operação, e a saída deve ser estabilizada para uma tensão fixa. Isso faz com que haja a necessidade do controle do conversor para que as diferenças na tensão de entrada sejam compens

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14

Xu, Ping. "High-frequency Analog Voltage Converter Design." PDXScholar, 1994. https://pdxscholar.library.pdx.edu/open_access_etds/4891.

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For many high-speed, high-performance circuits, purely differential inputs are needed. This project focuses on building high-speed voltage converters which can transfer a single-ended signal to a purely differential signal, or a differential input signal to a single-ended signal. Operational transconductance amplifier (OTAs) techniques are widely used in high-speed continuous-time integrated analog signal processing (ASP) circuits because resistors, inductors, integrators, buffers, multipliers and filters can be built by OT As and capacitors. Taking advantage of OT As, very-high-speed voltage

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15

Singh, Gunjan. "Computer control of a pulse width modulated AC/DC converter under a variable frequency power supply." Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1175884455.

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Kravetz, Fábio Inocêncio. "Conversor SEPIC modificado com acoplamento magnético série e célula multiplicadora de tensão." Universidade Tecnológica Federal do Paraná, 2018. http://repositorio.utfpr.edu.br/jspui/handle/1/3201.

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As fontes renováveis de energia, em especial a energia solar fotovoltaica vem ganhando espaço nos últimos anos devido ao avanço da tecnologia, redução dos custos e redução das fontes não-renováveis. Os painéis fotovoltaicos isoladamente ou para pequenas aplicações geram uma baixa tensão de saída e a adequação dos níveis de tensão fornecidos em sua saída aos requeridos pela concessionária de energia elétrica é um desafio. Neste trabalho é apresentada uma nova estrutura modificada da topologia do conversor SEPIC que usa as técnicas de acoplamento magnético série e células multiplicadoras de tens

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17

Darabi, Mostafa. "A new family of dc-dc-ac power electronics converters." Thesis, 2014. http://hdl.handle.net/1805/5851.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>This thesis proposes a family of non-isolated bidirectional converter in order to interface dc and ac variables. Such power electronics solutions guarantee: (i) bidirectional power flow between dc and ac converter sides, (ii) independent control in both converter sides, (iii) high level of integration with a reduction of one power switch and its drive circuits, (iv) implementation of two functions by using a unique power conversion stage and (v) reduction of the capacitor losses. Despite proposing new power converter solutions,

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18

Gulpinar, Feyzullah. "A non-conventional multilevel flying-capacitor converter topology." Thesis, 2014. http://hdl.handle.net/1805/6299.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>This research proposes state-of-the-art multilevel converter topologies and their modulation strategies, the implementation of a conventional flying-capacitor converter topology up to four-level, and a new four-level flying-capacitor H-Bridge converter confi guration. The three phase version of this proposed four-level flying-capacitor H-Bridge converter is given as well in this study. The highlighted advantages of the proposed converter are as following: (1) the same blocking voltage for all switches employed in the con fig

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19

Murray, Nick. "Flexible power control in large power current source conversion : a thesis presented for the degree of Doctor of Philosophy in Electrical and Computer Engineering at the University of Canterbury, Christchurch, New Zealand /." 2008. http://hdl.handle.net/10092/2610.

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20

Ho, Yu-Fan, and 何雨璠. "Polyelectrolyte Brushes in Direct-Current Electric Fields: a Computer Simulation Study." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/71939441341151514935.

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碩士<br>國立清華大學<br>工程與系統科學系<br>100<br>We use Langevin dynamics simulations to investigate the conformation of polyelectrolyte (PE) brushes and the counterions distribution at different grafting densities in direct-current uniform electric fields |E|. The field direction is perpendicular to the substrate surface. Firstly, we observe that |E| larger than a critical electric field |E*| can induce large conformational change of PE brushes. At low grafting densities, the height of chains stretch together with |E| and the brush is in a homogeneous phase. However, at intermediate and high graftin

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21

Belaguli, Vijayakumar. "Series-parallel and parallel-series resonant converters operating on the utility line - analysis, design, simulation and experimental results." Thesis, 1995. https://dspace.library.uvic.ca//handle/1828/9445.

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High performance ac-to-dc converters are required to meet the regulation standards to suit wide variety of applications. This thesis presents the steady state analysis, design and operation of high frequency (HF) transformer isolated resonant converters on the single phase utility line as a low harmonic controlled rectifier. Two resonant converter configurations of third order have been studied namely the LCC-type parallel resonant converter also popularly known as series-parallel resonant converter (SPRC) and the hybrid parallel-series resonant converter bridge (HPSRCB). These converters are

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22

Nathan, Biju S. "Analysis, Simulation And Design Of Series Resonant Converter For High Voltage Applications." Thesis, 1999. https://etd.iisc.ac.in/handle/2005/1637.

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Nathan, Biju S. "Analysis, Simulation And Design Of Series Resonant Converter For High Voltage Applications." Thesis, 1999. http://etd.iisc.ernet.in/handle/2005/1637.

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Farooqi, Quazi Mohammed Rushaed. "Injector Waveform Monitoring of a Diesel Engine in Real-Time on a Hardware in the Loop Bench." 2011. http://hdl.handle.net/1805/2922.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>This thesis presents the development, experimentation and validation of a reliable and robust system to monitor the injector pulse generated by an Engine Control Module (ECM) and send the corresponding fueling quantity to the real-time computer in a closed loop Hardware In the Loop (HIL) bench. The system can be easily calibrated for different engine platforms as well. The fueling quantity that is being injected by the injectors is a crucial variable to run closed loop HIL simulation to carry out the performance testing of engine, a

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