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Rozprawy doktorskie na temat „Voltage controlled converter”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Luc, Brian R. "Digitally Controlled Zero-Voltage-Switching Quasi-Resonant Buck Converter." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1346.

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ABSTRACT Digitally-Controlled Two-Phase Zero-Voltage-Switching Quasi-Resonant Buck Converter Brian Luc This thesis entails the design, construction, and performance analysis of a digitally-controlled two-phase Zero-Voltage Switching Quasi-Resonant (ZVS-QR) buck converter. The converter is aimed to address the issues associated with powering CPUs operating at lower voltage and high current. To evaluate its performance, the Two-Phase ZVS-QR buck converter is compared against a traditional Two-Phase buck converter. The design procedure required to implement both converters through utilizing the c

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Han, Sangtaek. "High-power bi-directional DC/DC converters with controlled device stresses." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/49010.

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The objective of the research is to develop a cost-effective high-power bi-directional dc/dc converter with low total-device ratings, reduced system parasitic effects, and a wide input/output range. Additional objectives of the research are to develop a small-signal model and control methods, and to present performance characterizations. Device stresses in the proposed topology are controlled to maintain minimal levels by varying the duty ratio and phase-shift angle between the primary and the secondary bridges, which results in a low total-device rating, when compared to conventional bi-direc

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Smith, Nathaniel R. "Characterization and Design of Voltage-Mode Controlled Full-Bridge DC/DC Converter with Current Limit." Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright152721348332911.

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Yoder, Samantha. "Analysis and Modeling of Non-idealities in VCO-Based Quantizers Using Frequency-to-Digital and Time-to-Digital Converters." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1283951960.

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Lobato, Salatiel de Castro. "Fonte de corrente para aplicação em magnetos de aceleradores de partículas." Universidade Federal de Juiz de Fora (UFJF), 2016. https://repositorio.ufjf.br/jspui/handle/ufjf/3646.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-03-13T15:20:14Z No. of bitstreams: 1 salatieldecastrolobato.pdf: 51678452 bytes, checksum: 022776c88833a1e47901180ebd1f826b (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-03-13T19:33:17Z (GMT) No. of bitstreams: 1 salatieldecastrolobato.pdf: 51678452 bytes, checksum: 022776c88833a1e47901180ebd1f826b (MD5)<br>Made available in DSpace on 2017-03-13T19:33:17Z (GMT). No. of bitstreams: 1 salatieldecastrolobato.pdf: 51678452 bytes, checksum: 022776c88833a1e47901180ebd1f826b (MD5) Pr

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Zabihi, Sasan. "Flexible high voltage pulsed power supply for plasma applications." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/48137/1/Sasan_Zabihi_Sheykhrajeh_Thesis.pdf.

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Demands for delivering high instantaneous power in a compressed form (pulse shape) have widely increased during recent decades. The flexible shapes with variable pulse specifications offered by pulsed power have made it a practical and effective supply method for an extensive range of applications. In particular, the release of basic subatomic particles (i.e. electron, proton and neutron) in an atom (ionization process) and the synthesizing of molecules to form ions or other molecules are among those reactions that necessitate large amount of instantaneous power. In addition to the decompositi

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7

Hadjikypris, Melios. "Supervisory control scheme for FACTS and HVDC based damping of inter-area power oscillations in hybrid AC-DC power systems." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/supervisory-control-scheme-for-facts-and-hvdc-based-damping-of-interarea-power-oscillations-in-hybrid-acdc-power-systems(cc03b44a-97f9-44ec-839f-5dcbcf2801f1).html.

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Modern interconnected power systems are becoming highly complex and sophisticated, while increasing energy penetrations through congested inter-tie lines causing the operating point approaching stability margins. This as a result, exposes the overall system to potential low frequency power oscillation phenomena following disturbances. This in turn can lead to cascading events and blackouts. Recent approaches to counteract this phenomenon are based on utilization of wide area monitoring systems (WAMS) and power electronics based devices, such as flexible AC transmission systems (FACTS) and HVDC

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8

Martin, Fregelius. "Power electronics and controller interface for a Voltage Source Converter." Thesis, Uppsala universitet, Elektricitetslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-322903.

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The purpose of the thesis is to develop a system for a split-rotor drive and evaluatecontrollers and their internal components such as processors, communicationprotocols and execution speed for controlling magnetization currents in a hydropower station.The first part of the thesis builds the theory review and provides an introduction tothe most common processors and controllers available. The processors which wasevaluated were microprocessor, DSP and FPGA which have a high capacity andvariety of implementation possibilities. Two controllers, PLC and PAC whereevaluated, which contain some or se

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9

Mulolani, Francis. "Performance of direct power controlled grid-connected voltage source converters." Thesis, University of Newcastle upon Tyne, 2017. http://hdl.handle.net/10443/3754.

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In this thesis the performance of direct power controlled grid-connected voltage source converters (VSCs) is investigated. Of particular interest is the stability of the controller with the third-order LCL filter employed as the grid filter, effect of grid impedance variations and grid voltage distortion, and current limitation during voltage dips. The control scheme implemented is virtual-flux direct power control with space vector modulation (VF-DPC-SVM). By mathematical modelling and stability analysis, it is found that the closed-loop power control system is stable for all values of propor

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10

Kim, Changdong. "Electrooptic matched filter controlled by independent voltages applied to multiple sets of electrodes." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3305.

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Analysis and experimental results on a polarization independent electrooptic matched filter (EMF) with a center wavelength of 1.53 μm are reported. The EMF utilizes electrooptic phase-matched TE↔TM conversion in a Ti-diffused waveguide on a LiNbO3 substrate. The operation of the EMF to select an optical frequency channel is controlled by applying independent voltages to interdigital electrode sets cascaded along a single mode waveguide. The device is inherently polarization independent and has the potential for submicrosecond tuning. The number of selectable channels N is related to

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11

Mukka, Manoj Kumar. "Simulink® Based Design and Implementation of a Solar Power Based Mobile Charger." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc849640/.

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Electrical energy is used at approximately the rate of 15 Terawatts world-wide. Generating this much energy has become a primary concern for all nations. There are many ways of generating energy among which the most commonly used are non-renewable and will extinct much sooner than expected. Very active research is going on both to increase the use of renewable energy sources and to use the available energy with more efficiency. Among these sources, solar energy is being considered as the most abundant and has received high attention. The mobile phone has become one of the basic needs of modern

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12

Straayer, Matthew A. Z. (Matthew Allen Zornig). "Noise shaping techniques for analog and time to digital converters using voltage controlled oscillators." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44724.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.<br>Includes bibliographical references (p. 175-181).<br>Advanced CMOS processes offer very fast switching speed and high transistor density that can be utilized to implement analog signal processing functions in interesting and unconventional ways, for example by leveraging time as a signal domain. In this context, voltage controlled ring oscillators are circuit elements that are not only very attractive due to their highly digital implementation which takes advantage of scaling,

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13

Brinsfield, Jason. "Modeling and Simulation of Parallel D-STATCOMs with Full-Wave Rectifiers." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1209.

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In recent years, both a significant increase in electrical demand and a large influx of intermittent renewable energy sources have put a considerable stress on the nation’s electrical grid. Conventional power flow control techniques such as capacitor banks and tap-changing transformers are incapable of adequately handling the rapid fluctuations in power supply and demand that today’s grid experiences. Flexible AC Transmission System (FACTS) controllers are a practical way to compensate for such rapid power fluctuations. One type of shunt FACTS controller is the Static Synchronous Compensator (

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14

Opperman, Tjaart Adriaan Kruger. "A 5 GHz BiCMOS I/Q VCO with 360° variable phase outputs using the vector sum method." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-04082009-171225/.

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Thesis (M.Eng.(Microelectronic Engineering))--University of Pretoria, 2009.<br>Includes summaries in Afrikaans and English. Includes bibliographical references (leaves [74]-78). Mode of access: World Wide Web.

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15

Gabe, Ivan Jorge. "Analise e controle de aerogeradores com conversor pleno durante afundamentos de tensão." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/3678.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>This thesis addresses the main issues regarding the operation of full power converters wind turbines connected to the grid under balanced and unbalanced voltage sags. In the past, the grid codes allowed wind turbines to be disconnected during voltage and frequency disturbances. However, recently, grid codes updates often require that wind turbines remain connected during voltage sags aiming to provide voltage back-up support. Furthermore, some specific criteria establish that wind turbines should be able to utilize part of its cu

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Nami, Alireza. "A new multilevel converter configuration for high power and high quality applications." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/33216/1/Alireza_Nami_Thesis.pdf.

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The Queensland University of Technology (QUT) allows the presentation of theses for the Degree of Doctor of Philosophy in the format of published or submitted papers, where such papers have been published, accepted or submitted during the period of candidature. This thesis is composed of ten published /submitted papers and book chapters of which nine have been published and one is under review. This project is financially supported by an Australian Research Council (ARC) Discovery Grant with the aim of investigating multilevel topologies for high quality and high power applications, with speci

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17

Cúnico, Lucas Mondardo. "Estudo do conversor modular multinível." Universidade do Estado de Santa Catarina, 2013. http://tede.udesc.br/handle/handle/1863.

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Made available in DSpace on 2016-12-12T17:38:32Z (GMT). No. of bitstreams: 1 Lucas M Cunico.pdf: 25684121 bytes, checksum: ea9738a6141379467e611c829e42ebe0 (MD5) Previous issue date: 2013-02-15<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The modular multilevel converter emerged as a new topology of multilevel converters, being introduced in 2002. The advantages of this topology are related to its modularity and scalability. This work presents the study and implementation of this converter, which includes the presentation of the main methods of modulation and voltage bal

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18

De, Bonis Gianluca. "Studio, simulazione e verifica sperimentale di tecniche di controllo per convertitori multilivello modulari." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6771/.

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L’evoluzione dei componenti elettronici di potenza ed il conseguente sviluppo dei convertitori statici dell’energia elettrica hanno consentito di ottenere un’elevata efficienza energetica, sia nell’ambito degli azionamenti elettrici, sia nell’ambito della trasmissione e distribuzione dell’energia elettrica. L’efficienza energetica è una questione molto importante nell’attuale contesto storico, in quanto si sta facendo fronte ad una elevatissima richiesta di energia, sfruttando prevalentemente fonti di energia non rinnovabili. L’introduzione dei convertitori statici ha reso possibile un notevol

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19

Liu, Jingbo. "Modeling, analysis and design of integrated starter generator system based on field oriented controlled induction machines." Columbus, Ohio : Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1132763176.

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20

Machado, Martínez Juan Eduardo. "Some Problems on the Analysis and Control of Electrical Networks with Constant Power Loads On Existence of Equilibria of Multi-Port Linear AC Networks With Constant-Power Loads An Adaptive Passivity-Based Controller of a Buck-Boost Converter with a Constant Power Load Power-Controlled Hamiltonian Systems: Application Electrical Systems with Constant Power Loads On the Existence and Long-Term Stability of Voltage Equilibria in Power Systems with Constant Power Loads Active Damping of a DC Network with a Constant Power Load: An Adaptive Observer-based Design." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS445.

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La croissante demande d'énergie électrique a conduit à la conception de systèmes électriques de grande complexité où les combustibles fossiles constituent la principale source d'énergie. Néanmoins, les préoccupations environnementales poussent à un changement majeur dans les pratiques de production d'électricité, avec un passage marqué des énergies fossiles aux énergies renouvelables et des architectures centralisées à distribuées. Les problèmes de stabilité dus à la présence de ce qu'on appelle les Charges à Puissance Constante (CPLs) constituent l’un des principaux défis auxquels sont confro

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21

Antonopoulos, Antonios. "On the Internal Dynamics and AC-Motor Drive Application of Modular Multilevel Converters." Doctoral thesis, KTH, Elektrisk energiomvandling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156200.

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This thesis is an effort to investigate the operation and the performanceof modular multilevel converters (M2Cs). Proven to be the most promisingtopology in high-voltage high-power applications, it is necessary to put aneffort in understanding the physical laws that govern the internal dynamicsof such converters, in order to design appropriate control methods. AlthoughM2Cs belong to the well-studied family of voltage-source converters (VSCs),and claim a modular structure, their control is significantly more complicatedcompared to two- or three-level VSCs, due to the fact that a much highernumb

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22

Li, Sulin. "A Highly Digital VCO-Based ADC With Lookup-Table-Based Background Calibration." Digital WPI, 2019. https://digitalcommons.wpi.edu/etd-dissertations/556.

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CMOS technology scaling has enabled dramatic improvement for digital circuits both in terms of speed and power efficiency. However, most traditional analog-to-digital converter (ADC) architectures are challenged by ever-decreasing supply voltage. The improvement in time resolution enabled by increased digital speeds drives design towards time-domain architectures such as voltage-controlled-oscillator (VCO) based ADCs. The main challenge in VCO-based ADC design is mitigating the nonlinearity of VCO Voltage-to-frequency (V-to-f) characteristics. Achieving signal-to-noise ratio (SNR) performance

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23

Silveira, Augusto Wohlgemuth Fleury Veloso da. "Controle de tensão na carga para motor/gerador a relutância variável de três fases." Universidade Federal de Uberlândia, 2012. https://repositorio.ufu.br/handle/123456789/14299.

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Fundação de Amparo a Pesquisa do Estado de Minas Gerais<br>The subject of this work is to present a switched reluctance machine (SRM) driver capable to control the machine as a motor/generator, allowing the transition between the modes of operation while the machine is running. Six load voltage control strategies developed to be applied to a switched reluctance generator was performed, being that the strategies AV2, TBV, Hi and AMV was developed in this work. A SRM simulation able to represent the machine as a motor/generator was implemented and the results were presented. The load voltage str

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Piveta, Renan. "Otimização do rendimento do conversor DAB aplicado ao transformador eletrônico." Universidade Federal de Santa Maria, 2015. http://repositorio.ufsm.br/handle/1/8569.

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This work developed a deep investigation about different three level three level modulation patterns that the DAB converter can operate, and the impact of these different patterns over the converter power flow and efficiency. The DAB converter can be controlled by three design variables, here defined as control trio (D1, D2, φ). D1 is the duty cycle applied to the high voltage Full Bridge, D2 is the duty cycle applied to the low voltage Full Bridge and φ is the angle between the voltages. For the selection of the control trio that allow the current flow reduction and the efficiency maximizat

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25

Jalboub, Mohamed K. "Investigation of the application of UPFC controllers for weak bus systems subjected to fault conditions. An investigation of the behaviour of a UPFC controller: the voltage stability and power transfer capability of the network and the effect of the position of unsymmetrical fault conditions." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5699.

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In order to identify the weakest bus in a power system so that the Unified Power Flow Controller could be connected, an investigation of static and dynamic voltage stability is presented. Two stability indices, static and dynamic, have been proposed in the thesis. Multi-Input Multi-Output (MIMO) analysis has been used for the dynamic stability analysis. Results based on the Western System Coordinate Council (WSCC) 3-machine, 9-bus test system and IEEE 14 bus Reliability Test System (RTS) shows that these indices detect with the degree of accuracy the weakest bus, the weakest line and the volta

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Fares, Adnan. "Development of advanced architectures of power controllers dedicated to Ultra High Switching Frequency DC to DC converters." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS195.

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La sophistication grandissante des dispositifs intelligents ultra-portatifs, tels que les smartphones ou les tablettes,crée un besoin d'amélioration des performances des organes de conversion de puissance.La tendance des technologies d'acheminement de puissance évolue progressivement vers une fréquence plus élevée, une meilleure densité d'intégration et une plus grande flexibilité dans les schémas d'asservissement. La modulation dynamique de tension est utilisée dans les circuits intégrés de gestion de puissances(DVS PMICs)des transmetteurs RF alors que la modulation DVFS est utilisée dans les

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27

Jalboub, Mohamed. "Investigation of the application of UPFC controllers for weak bus systems subjected to fault conditions : an investigation of the behaviour of a UPFC controller : the voltage stability and power transfer capability of the network and the effect of the position of unsymmetrical fault conditions." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5699.

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In order to identify the weakest bus in a power system so that the Unified Power Flow Controller could be connected, an investigation of static and dynamic voltage stability is presented. Two stability indices, static and dynamic, have been proposed in the thesis. Multi-Input Multi-Output (MIMO) analysis has been used for the dynamic stability analysis. Results based on the Western System Coordinate Council (WSCC) 3-machine, 9-bus test system and IEEE 14 bus Reliability Test System (RTS) shows that these indices detect with the degree of accuracy the weakest bus, the weakest line and the volta

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Terlemez, Bortecene. "Oscillation Control in CMOS Phase-Locked Loops." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4841.

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Recent advances in voltage-controlled oscillator (VCO) design and the trend of CMOS processing indicate that the oscillator control is quickly becoming one of the forefront problems in high-frequency and low-phase-noise phase-locked loop (PLL) design. This control centric study explores the limitations and challenges in high-performance analog charge-pump PLLs when they are extended to multiple gigahertz applications. Several problems with performance enhancement and precise oscillator control using analog circuits in low-voltage submicron CMOS processes, coupled with the fact that analo

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29

Upadhyay, Abhishek Kumar. "A GENERALIZED CONTROL METHOD FOR CONSTANT SWITCHING FREQUENCY THREE PHASE PWM BOOST RECTIFIER UNDER EXTREME UNBALANCED OPERATION CONDITION." Cleveland State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=csu1449719352.

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Menke, Maikel Fernando. "Sistema eletrônico de alto fator de potência com entrada universal e controle de intensidade luminosa para o acionamento de leds." Universidade Federal de Santa Maria, 2016. http://repositorio.ufsm.br/handle/1/12299.

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This master thesis presents the development of a 100 W LED driver, suitable for outdoor and street lighting. In order to match the driver and LED features, special functionalities are added to the electronic system. To obtain a long lifetime, electrolytic capacitor are exchanged by film capacitor, with longer useful lifetime. However, this practice outcome in higher bus voltage ripple, which have to be compensated in the LED current control stage, named as power control stage. To achieve special functionalities, the proposed driver is designed to operate with universal input voltage and d

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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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Almeida, Pedro Machado de. "Modelagem e controle de conversores fonte de tensão utilizados em sistemas de geração fotovoltaicos conectados à rede elétrica de distribuição." Universidade Federal de Juiz de Fora (UFJF), 2011. https://repositorio.ufjf.br/jspui/handle/ufjf/4134.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-04-20T13:39:03Z No. of bitstreams: 1 pedromachadodealmeida.pdf: 13436160 bytes, checksum: 84c66613dade0766ae9ea2bdc8be9f91 (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-04-20T14:45:37Z (GMT) No. of bitstreams: 1 pedromachadodealmeida.pdf: 13436160 bytes, checksum: 84c66613dade0766ae9ea2bdc8be9f91 (MD5)<br>Made available in DSpace on 2017-04-20T14:45:37Z (GMT). No. of bitstreams: 1 pedromachadodealmeida.pdf: 13436160 bytes, checksum: 84c66613dade0766ae9ea2bdc8be9f91 (MD5) Previ

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Fogli, Gabriel Azevedo. "Integração de um grupo motor gerador diesel em uma rede secundária de distribuição através de um conversor estático fonte de tensão." Universidade Federal de Juiz de Fora (UFJF), 2014. https://repositorio.ufjf.br/jspui/handle/ufjf/4181.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-04-26T12:14:24Z No. of bitstreams: 1 gabrielazevedofogli.pdf: 13619054 bytes, checksum: d260cb2571f242e43eab89132a03d62c (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-04-26T12:26:45Z (GMT) No. of bitstreams: 1 gabrielazevedofogli.pdf: 13619054 bytes, checksum: d260cb2571f242e43eab89132a03d62c (MD5)<br>Made available in DSpace on 2017-04-26T12:26:45Z (GMT). No. of bitstreams: 1 gabrielazevedofogli.pdf: 13619054 bytes, checksum: d260cb2571f242e43eab89132a03d62c (MD5) Previous is

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Ferreira, Rodrigo Arruda Felício. "Controle de microrredes CC baseado em droop adaptativo de tensão – simulação em tempo real com control-hardware-in-loop." Universidade Federal de Juiz de Fora (UFJF), 2015. https://repositorio.ufjf.br/jspui/handle/ufjf/4173.

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Dundáček, Martin. "Mikroprocesorový modul řízení SS motoru se zpětnou vazbou." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217259.

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This thesis deals with DC motor control. Main goal was design and realization of DC motor controler module with feedback. The first part dwells on methods for DC motor control and HW design of control module. The second part describes development of software for the module, testing and sums up results.

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Sattouf, Mousa. "Systém snímání dat a ovládání vodní elektrárny prostřednictvím internetové techniky." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-233685.

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Vodní energie se nyní stala nejlepším zdrojem elektrické energie na zemi. Vyrábí se pomocí energie poskytované pohybem nebo pádem vody. Historie dokazuje, že náklady na tuto elektrickou energii zůstávají konstantní v průběhu celého roku. Vzhledem k mnoha výhodám, většina zemí nyní využívá vodní energie jako hlavní zdroj pro výrobu elektrické energie.Nejdůležitější výhodou je, že vodní energie je zelená energie, což znamená, že žádné vzdušné nebo vodní znečišťující látky nejsou vyráběny, také žádné skleníkové plyny jako oxid uhličitý nejsou vyráběny, což činí tento zdroj energie šetrný k životn

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Yang, Chih-Neng, and 楊智能. "Class E Resonant DC/DC Converter with Controlled Output Voltage." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/25899885786766706415.

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碩士<br>國立海洋大學<br>電機工程學系<br>85<br>In this thesis, we make a high-frequency high-efficiency resonant DC/DC converter,Which is composed of a classical Class E inverter and a Class Erectifier.The converter operates with load resistance ranging from a full loadto infinity,while maintaining Zero-Voltage switching for the transistor in the inverter and the diode in the rectifier. The output voltage is varied from 3Vto 30V at an input voltage of 12V.We take simulation for two different switching fr

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Adhikari, Soumalya, Saptarshi Pal Choudhuri, and Supriya Sneha. "Study of voltage controlled oscillator based analog-to-digital converter." Thesis, 2011. http://ethesis.nitrkl.ac.in/2272/1/thesis.pdf.

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A voltage controlled oscillator (VCO) based analog-to-digital converter (ADC) is a time based architecture with a first-order noise-shaping property, which can be implemented using a VCO and digital circuits. This thesis analyzes the performance of VCO-based ADCs in the presence of non idealities such as jitter, nonlinearity, mismatch, and the metastability of D flip-flops. Based on this analysis, design criteria for determining parameters for VCO-based ADCs are described. Further, the study involves the use of VCO based Dual-slope A/D converter and its behaviour under different input voltage

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Wu, Jui-Chi, and 吳瑞騏. "Digitally Controlled Low-EMI DC-DC Converter with Programmable Output Voltage." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/52616364425907329878.

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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>97<br>This paper proposes a digitally controlled low-EMI DC-DC converter with programmable output voltage, which includes programmable digital ΣΔ voltage reference generator and complete circuits of digital control. Concept of resistance multiplier is first introduced in this paper. Random Pulse Position Modulation (RPPM), system control circuit, and dead time optimization control which is accomplished by our improved version of Area-Efficient DPWM and Hybrid DPWM are also introduced in this work. By the technique mentioned above, the area, power consumption, tran

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Kuan-HoLiu and 劉冠和. "Secondary-Side Controlled Flyback Converter with Constant Frequency Zero-Voltage-Switching." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/hxcn64.

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Mohaddes, Khorassani Mojtaba. "Neural network controlled optimal pulse width modulation for a voltage source converter." 2001. http://hdl.handle.net/1993/19586.

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"Digital Controlled Multi-phase Buck Converter with Accurate Voltage and Current Control." Doctoral diss., 2017. http://hdl.handle.net/2286/R.I.46206.

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abstract: A 4-phase, quasi-current-mode hysteretic buck converter with digital frequency synchronization, online comparator offset-calibration and digital current sharing control is presented. The switching frequency of the hysteretic converter is digitally synchronized to the input clock reference with less than ±1.5% error in the switching frequency range of 3-9.5MHz. The online offset calibration cancels the input-referred offset of the hysteretic comparator and enables ±1.1% voltage regulation accuracy. Maximum current-sharing error of ±3.6% is achieved by a duty-cycle-calibrated delay lin

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Hsiao, Yu-Jing, and 蕭鈺靜. "A Dead-Beat Controlled Multi-phase Buck Converter and An Auto-Reset Voltage-Regulated Fly-back Converter." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/87dk4v.

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碩士<br>國立臺北科技大學<br>電子工程系研究所<br>105<br>The first proposed converter of this thesis is a dead-beat controlled multi-phase buck converter. Its phase signal generator can achieve all phase signal and work in wide switching frequency. This configuration uses the dead-beat controlled technique to provide a wide output voltage range from 0.6 V to 2 V and an output current range from 0.5 A to 1 A. The proposed buck converter also has the characteristics of high stability and low output ripple. The proposed buck converter has been simulated with TSMC 0.18μm 3.3 V CMOS 1P6M technology, and the chip area

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Wu, Jhih-Yao, and 吳智堯. "A Hysteretic-Current-Controlled Buck Converter with OTA-C Integral Circuits and A Hysteretic-Voltage-Controlled Buck Converter with Pseudo-Current-Sensing Techniques." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/8vu7ep.

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碩士<br>國立臺北科技大學<br>電子工程系<br>106<br>The thesis proposes two converters. The first proposed converter is a hysteretic-current-controlled buck converter with OTA-C integral circuit. This proposed OTA-C integral circuit senses the inductor current. To eliminate the spike form the buck converter switches and omit a sample and hold circuit. The hysteretic-current-controlled has a fast transient response. The proposed is implemented with TSMC 0.35um CMOS 2P4M process, and the chip area is 2.1456 mm2. The input voltage range is 3V to 3.6V. When the output voltage is 2.5 V and the output current is 300

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Lin, Sheng-Hsiung, and 林聖雄. "Nonlinear Behaviours and Chaotic Control of Voltage-Mode Controlled Half-Bridge Buck Converter." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/26233156974071576367.

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碩士<br>龍華科技大學<br>電機工程系碩士班<br>104<br>This thesis investigates the nonlinear behaviours of voltage-mode controlled half-bridge buck converter when the load resistance and input voltage are changed. And consider the inductor current in continuous conduction mode to study the characteristics of converter and chaotic control techniques. Firstly, the equivalent switching states and the mathematical models of voltage-mode controlled half-bridge buck converter are derived. According to these models, MATLAB / SIMULINK is used to construct models of voltage-mode controlled half-bridge buck converter. Wit

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Wolfe, Brandon Ward. "Voltage-mode controlled synchronous DC-DC buck converter using 0.13[mu] CMOS switches." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-12-4810.

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This report is a study of the effects of a commercial 0.13[mu] process and automotive temperature corners on a synchronous DC-DC buck converter design. The basics of switching converters will be explored with an emphasis on voltage-mode controlled feedback. A Type-III compensation network is designed using transfer function analysis to compensate for the inherent double pole introduced by an LC network. The output of the compensation network will drive a pulse width modulation comparator to vary the duty cycle of the high-side PMOS and low-side NMOS transistor switches. After the synchronous b

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CHUANG, SHANG-HSIEN, and 莊尚憲. "Digital-Controlled Step-Down DC-DC Converter with Non-Linear Voltage Transfer Ratio." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/79811925627741484143.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>102<br>This thesis aims to design and achieve a non-isolated step-down DC-DC converter with non-linear voltage transfer ratio by digital-controlled. In the condition of high step-down conversion ratio and transformerless, classical buck converter needs very small duty. However, step-down DC-DC converter with non-linear conversion has larger duty than classical buck converter. It will raise the switch’s utilization and conversion efficiency. This thesis uses TMS320F28035 DSP chip for digital-controlled which is made by TI Inc. By using current loop and voltage loop, t

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Mei-RuLu and 盧美如. "Design and Implementation of Digitally Controlled Interleave Converter with Adaptive Voltage Positioning Scheme." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/42845262242299533916.

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LIN, JIA-MING, and 林佳銘. "Buck Converter with Active-Current-Sensing Techniques and Hysteretic-Voltage-Controlled Buck Converter with Pseudo-Current-Sensing Techniques." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/t6xmfj.

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碩士<br>國立臺北科技大學<br>電子工程系<br>107<br>In the first converter, the active-current-sensing technique is used to sense the inductor current, which can reduce the glitch caused by switching. The proposed circuit not only performs with fast transient response time, but also improves the conversion efficiency. The first converter is implemented with TSMC 0.35-µm COMS process. The chip area is roughly 1.488×1.433 mm2, the input voltage is 3.3 V，and the output voltage varies from 1.0 V to 2.5 V, When the output voltage is 2.5 V and the output current is 200 mA, the highest efficiency is 87.2%. The second

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Yen, Tzu-Yang, and 顏子揚. "Hysteresis-Controlled DC-DC Buck/Boost Current Converter and The Low-voltage Low-power Voltage Regulated Charge Pump." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/96sxzg.

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碩士<br>國立臺北科技大學<br>電腦與通訊研究所<br>95<br>In this thesis, we design switching mode DC-DC current converter based on hysteresis-controlled technique. This structure is a novel and original circuit. There is not relative circuit presented in the paper, and this technology get better driving to apply to current mode loading like Motor or OLED etc. DC-DC current converter can decrease the noise due to stray inductance effect which is generated by conducting wire. As a result, we use current converter to current mode loading will reduce the interference of noise, and increase stability and accuracy of po

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