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Dissertations / Theses on the topic 'Multi-phase DC/DC converter'

Author: Grafiati

Published: 23 November 2024

Last updated: 31 July 2025

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1

Qin, Ruiyang. "Study on Three-level DC/DC Converter with Coupled Inductors." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/73169.

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High power multi-level converters are deemed as the mainstay power conversion technology for renewable energy systems including the battery storage system, PV farm and electrical vehicle charge station. This thesis is focused on the study of three-level DC/DC converter with multi-phase interleaved structure, with coupled and integrated magnetics to achieve high power density. The proposed interleaved phased legs offer the benefit of output current ripple reduction, while inversed coupled inductors can suppress the circulating current between phase legs. Compared with conventional non-interleav

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2

Jacobs, Joseph [Verfasser]. "Multi-Phase Series Resonant DC-to-DC Converters / Joseph Jacobs." Aachen : Shaker, 2006. http://d-nb.info/1166513211/34.

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3

Liu, Changrong. "A Novel High-Power High-Efficiency Three-Phase Phase-Shift DC/DC Converter for Fuel Cell Applications." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/26048.

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Fuel cells are a clean, high-efficiency source for power generation. This innovative technology is going to penetrate all aspects in our life, from utility distributed power, transportation applications, down to power sources for portable devices such as laptop computer and cell phones. To enable the usage of fuel cell, developing power converters dedicated for fuel cells becomes imminent. Currently, the full-bridge converter is the dominating topology in high power dc/dc applications. Although multiphase converters have been proposed, most of them are dealing with high input-voltage systems,

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4

Wallberg, Alexander. "Design and construction of a bidirectional DC/DC converter." Thesis, Uppsala universitet, Elektricitetslära, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385240.

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A four quadrant general single-phase bi-directional DC/DC converter was designed and constructed for high effect systems. The target application for the DC/DC converter was to be used to transfer energy between different energy storages, a miniature DC power grid and the high voltage AC power city grid. The converter is capable of step-up and step-down operations in both directions i.e. it is bi-directional at varying voltage levels. Different DC/DC topologies were investigated, and thereafter simulations were performed in LTspice and Simulink to ensure its capabilities and functionalities. Th

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5

Fan, Shixiong. "Current source DC/DC converter based multi-terminal DC wind energy conversion system." Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=17007.

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Wind power energy conversion is growing rapidly in the world. There are two main wind farm types, namely ac grid-based and dc grid-based wind farms. The dc grid-based approach reduces the size and weight of the magnetic components and cables. In the dc system, the step-up dc/dc converter is the key component when interfacing the wind turbine to the ac grid, via its low/medium voltage generator. This thesis focuses on the control and design of a wind energy conversion system based on dc/dc current source converters. An optimized One-Power-Point method for maximum power tracking is proposed. It

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6

Rezaee, Ali. "WIDE RANGE BI-DIRECTIONAL DC-DC CONVERTER." Thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-41189.

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Bi-directional DC-DC converters are used for applications that require a flow of energy in two directions, while a wide range converter offer efficient operation over a wide range of input and output voltages. However, an efficient technology that is both bi-directional and Wide Input Wide Output (WIWO), currently, does not currently exist. To find a suitable topology, the work began by surveying the existing literature and when a potentially suitable solution was identified, it was evaluated via simulation. Using a wide range, unidirectional topology as the starting point, a converter top

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7

Ward, Gillian Anne. "Design of a multi-kilowatt, high frequency, DC-DC converter." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274596.

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8

Gunawan, Tadeus. "Two-Phase Boost Converter." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/200.

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A boost converter is one of the most efficient techniques to step up DC input voltage to a higher needed DC output voltage. The boost converter has many possible applications, such as in a photovoltaic system, hybrid car and battery charger. The proposed prototype in this report is a proof of concept that a Two-Phase Boost Converter is a possible improvement topology to offer higher efficiency without compromising any advantages readily offered by a basic boost. The prototype is designed to be able to handle up to 200 watts of output power with an input of 36 volts and an output of 48 volts. T

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9

Mazza, Luan Carlos dos Santos. "Single phase bidirectional DAB DC-DC converter based on three state switching cell." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14412.

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This work presented is DC-DC isolated ZVS Bidirectional Dual Active Bridge (DAB) single phase converter, based three-state switching cell is presented. The proposal is to apply it in photovoltaic systems with battery bank into smart networks. Basically the drive control is the duty cycle (D) of the switches and the Phase Shift (φ) of the fundamental tensions between the bridges. The gyrator modeling of the converter is presented, highlighting its natural operating characteristic as gyrator. Shows the qualitative and quantitative analysis of the converter, realizing the full study of the s

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10

Francisco, Venustiano Canales Abarca. "Novel DC/DC Converters For High-Power Distributed Power Systems." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/28612.

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One of the requirements for the next generation of power supplies for distributed power systems (DPSs) is to achieve high power density with high efficiency. In the traditional front-end converter based on the two-stage approach for high-power three-phase DPSs, the DC-link voltage coming from the power factor correction (PFC) stage penalizes the second-stage DC/DC converter. This DC/DC converter not only has to meet the characteristics demanded by the load, but also must process energy with high efficiency, high reliability, high power density and low cost. To meet these requirements, approa

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11

Mupambireyi, Ushindibaba. "Modelling, analysis and control of multi-phase electronically commutated DC machines : an enabling topology for DC converter fed networks." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/101516/.

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Multiphase electronically commutated dc machine is a new non-conventional machine and converter topology aimed at dc power generation and delivery systems. This thesis presents a detailed analysis of two multiphase electronically commutated dc machine topologies, firstly, the two level topology then the multilevel topology. Electronic current commutation processes in these topologies are analysed and electrical machine parameters that influence current commutation and the design of the electronic commutator are exposed. The behaviour of the power electronic commutator circuit is shown to be ti

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12

Mazumder, Sudip K. "Nonlinear Analysis and Control of Standalone, Parallel DC-DC, and Parallel Multi-Phase PWM Converters." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/28690.

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Applications of distributed-power systems are on the rise. They are already used in telecommunication power supplies, aircraft and shipboard power-distribution systems, motor drives, plasma applications, and they are being considered for numerous other applications. The successful operation of these multi-converter systems relies heavily on a stable design. Conventional analyses of power converters are based on averaged models, which ignore the fast-scale instability and analyze the stability on a reduced-order manifold. As such, validity of the averaged models varies with the switching freque

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13

Prasantanakorn, Chanwit. "Current Sharing Method for DC-DC Transformers." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/31112.

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An ever present trend in the power conversion industry is to get higher performance at a lower cost. In a computer server system, the front-end converter, supplying the load subsystems, is typically a multiple output power supply. The power supply unit is custom designed and its output voltages are fully regulated, so it is not very efficient or cost effective. Most of the load systems in this application are supplied by point-of-load converters (POLs). By leaving the output voltage regulation aspect to POLs, the front-end converter does not need to be a fully regulated, multiple output conver

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14

Boora, Arash Abbasalizadeh. "Flexible high-power multi DC-DC converters for train systems." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/33208/1/Arash_Boora_Thesis.pdf.

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This thesis reports on the investigations, simulations and analyses of novel power electronics topologies and control strategies. The research is financed by an Australian Research Council (ARC) Linkage (07-09) grant. Therefore, in addition to developing original research and contributing to the available knowledge of power electronics, it also contributes to the design of a DC-DC converter for specific application to the auxiliary power supply in electric trains. Specifically, in this regard, it contributes to the design of a 7.5 kW DC-DC converter for the industrial partner (Schaffler and As

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Bills, David Marlin. "Soft Switching Multi-Resonant Forward Converter DC to DC Application for Communications Equipment." Master's thesis, University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3497.

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In the field of power electronics there is always a push to create smaller and more efficient power conversion systems. This push is driven by the industry that uses the power systems, and can be realized by new semiconductor devices or new techniques. This examination describes a novel technique for a small and highly efficient method of converting relatively high DC voltage to a very low voltage for use in the telecommunications industry. A modification to the standard Forward Resonant converter results in improvements in component stress, system efficiency, response time, and control circui

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16

Perera, Lasantha Bernard. "Multi Level Reinjection ac/dc Converters for HVDC." Thesis, University of Canterbury. Electrical and Computer Engineering, 2006. http://hdl.handle.net/10092/1085.

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A new concept, the multi level voltage/current reinjection ac/dc conversion, is described in this thesis. Novel voltage and current source converter configurations, based on voltage and current reinjection concepts are proposed. These converter configurations are thoroughly analyzed in their ac and dc system sides. The fundamentals of the reinjection concept is discussed briefly, which lead to the derivation of the ideal reinjection waveform for complete harmonic cancellation and approximations for practical implementation. The concept of multi level voltage reinjection VSC is demonst

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17

Wan, Hongmei. "High Efficiency DC-DC Converter for EV Battery Charger Using Hybrid Resonant and PWM Technique." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/32343.

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The battery charger plays an important role in the development of electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs).This thesis focuses on the DC-DC converter for high voltage battery charger and is divided into four chapters. The background related to EV battery charger is introduced, and the topologies of isolated DC-DC converter possibly applied in battery charge are sketched in Chapter 1. Since the EV battery charger is high voltage high power, the phase-shifted full bridge and LLC converters, which are popularly used in high power applications, are discussed in detail i

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18

Merlin, Michael Marc Claude. "Hybrid multi-level HVDC converter and multi-terminal DC networks." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/39382.

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This thesis explains the working principles of an AC/DC converter topology intended for HVDC applications, called the Alternate Arm Converter (AAC). It consists of a hybrid between the modular multi-level converter (MMC) through the presence of H-bridge cells and the 2-level converter because of the director switches in each arm. Thanks to its cells, the AAC is able to generate a multi-level staircase AC voltage waveform which results a low distortion AC current while the director switches control which arms are conducting at any given time. By synchronising the conduction period of an arm wit

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Cliffe, Robert J. "High power high frequency DC-DC converter topologies for use in off-line power supplies." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/7305.

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The development of a DC-DC converter for use in a proposed range of one to ten kilowatt off-line power supplies is presented. The converter makes good use of established design practices and recent technical advances. The thesis begins with a review of traditional design practices, which are used in the design of a 3kW, 48V output DC-DC converter, as a bench-mark for evaluation of recent technical advances. Advances evaluated include new converter circuits, control techniques, components, and magnetic component designs. Converter circuits using zero voltage switching (ZVS) transitions offer si

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20

Mino, Kazuaki. "Novel hybrid unidirectional three-phase AC-DC converter systems /." [S.l.] : [s.n.], 2009. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=18185.

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21

Filho, Herminio Miguel de Oliveira. "Soft switching bidirectional isolated three-phase DC-DC converter using dual phase-shift control with variable duty cycle." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16346.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>This work presents the analysis, design example, simulations and experimental results on a soft-switching bidirectional isolated three-phase dc-dc converter using dual phase-shift control with variable duty cycle. The topology uses three single H-bridges in the primary side and a three-phase inverter in the secondary side. High-frequency isolation is ensured by using three single-phase transformers connected in open delta-wye configuration. The variation of both phase-shift (PS) angles between the H-bridge legs and/or primary and s

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22

Wu, Kuiyuan. "Analysis and design of isolated bidirectional DC-DC converter with novel triple phase-shift control." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42815.

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The bidirectional DC-DC converter is widely used in automobiles, energy storage systems, uninterruptible power supplies and aviation power systems. At present, there are three main problems in this area. The first problem concerns stability of the bidirectional converter when parameters change; the second is maintaining high efficiency of the bidirectional converter over wide load range; the third concerns the sensitivity of the efficiency of the bidirectional converter to parameter changes. This thesis presents a new method to determine the stability of the bidirectional converter using the L

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Urciuoli, Damian. "Switching Stage Design and Implementation for an Efficient Three-Phase 5kW PWM DC-DC Converter." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34378.

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With the development of fuel cell based power systems, the need for more advanced DC-DC power converters has become apparent. In such applications DC-DC converters provide an important link between low voltage fuel cell sources and inverter buses operating at significantly higher voltages. Advancements in converter efficiency, cost reduction, and size reduction are the most necessary. These challenges are formidable, even when considering the improvements made to conventional DC-DC topologies. However, it can be possible to achieve these criteria through the implementation of more advanced

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24

Thomas, Stephan [Verfasser]. "A Medium-Voltage Multi-Level DC/DC Converter with High Voltage Transformation Ratio / Stephan Thomas." Aachen : Shaker, 2014. http://d-nb.info/1049383176/34.

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Saleemi, Furqan Mubashir. "Analysis and Design of Multiphase Multi-Interleave DC-DC Converter with Input-Output Bypass Capacitor." DigitalCommons@CalPoly, 2008. https://digitalcommons.calpoly.edu/theses/24.

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The power requirements for the microprocessor have been increasing as per Moore's Law. According to International Technology Roadmap (ITRS), the Voltage Regulator Module (VRM) for the microprocessor will be 200 W(with 1V, 200A output) in 2010. With the VRMs topology of synchronous buck, serious technical challenges such as small duty cycle, high switching frequencies, and higher current demands, contribute to decreased power density and increased cost. This thesis proposes a Multiphase Multi-Interleave Buck topology to solve the technical challenges of powering future microprocessors. The crit

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Meola, Marco. "Design and modeling of a digital controller for multi mode DC-DC convertes." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3677.

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2008/2009<br>Convertitori dc-dc in grado di fornire una elevata efficienza per un ampio intervallo di valori di carico trovano il loro impiego in tutte quelle applicazioni dove dispositivi alimentati a batteria vengono utilizzati. In particolare, l’ottimizzazione dell’efficienza di tali convertitori per basse correnti di carico `e uno degli argomenti pi`u stimolanti nella progettazione di convertitori dc-dc. Nei convertitori multi-modo tale efficienza viene massimizzata mediante l’utilizzo di strategie di controllo diverse in funzione della corrente di uscita. In quest’ambito, il control

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Oshaben, Edward J. "DC-DC Power Converter Design for Application in Welding Power Source for the Retail Market." Cleveland State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=csu1296178360.

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Pepa, Elton. "Adaptive Control of a Step-Up Full-Bridge DC-DC Converter for Variable Low Input Voltage Applications." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/9722.

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This thesis shows the implementation of a novel control scheme DC-DC converter. The converter is a phase-shifted full-bridge PWM converter that is designed to operate as a front stage of a power conversion system where the input is a variable low voltage high current source. The converter is designed to step-up the low voltage input to an acceptable level that can be inverted to a 120/240 VAC 60Hz voltage for residential power. A DSP based adaptive control model is developed, taking into account line variations introduced by the input source while providing very good load dynamics for the conv

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Cheng, Sheng-Wen, and 鄭勝文. "Design and Implementation of a Multi-Phase Buck DC-DC Converter for Blade Servers." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/46655847937705213867.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>102<br>In this thesis, a digitally-controlled voltage regulation module (VRM) which is fully compliant with Intel® VR12.5 specifications is implemented. In the presented system, a four-phase buck converter topology is adopted. An IR3581 dual-loop digital multi-phase buck controller is utilized as the digital controller, and IR3578 integrated synchronous buck driver IC is used to implement the power stage. Advantages of using a digital controller and integrated driver chip include fewer peripheral components and high design flexibility. Main features of IR3581 control

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Kang, Zhe-Wei, and 康哲維. "Study of a Multi-Phase Isolated DC/DC Converter for PEM Fuel Cell Stacks." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/33731010025977904061.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>98<br>Recently, clean energy resources, such as wind turbines, photovoltaic systems or fuel cells, have been exploited for developing renewable electric power generation systems. Among them, the rapid advances in fuel cell technology have enabled the significant developments in fuel cell power system. The fuel cells feature numerous advantages, such as high energy density, high current output ability, and high-efficiency operation. However, the fuel cell stacks present a low voltage output and a wide range of voltage variations under different load, temperature, humi

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Hung, Ming-Fu, and 洪銘福. "The Design and Application of the Three Phase AC-DC Converter Simplified to the Single Phase DC-DC Converter." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/cc5m7n.

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碩士<br>國立臺北科技大學<br>電機工程系研究所<br>97<br>Three-phase AC-DC converters are gradually and widely being used in industry mainly for the improvement of the quality of the input current and adjust the magnitude of output voltage. By using the switch, the voltage and current on the input side are adjusted to be in-phase. As more and more types of three-phase AC-DC circuit topologies have been invented, usually the three-phase AC-DC converters are analyzed through the D-Q transformation. In the D-Q domain, the State Space equation are mutually coupled, thus the design of the control system is still diffic

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Tsai, Chia-Hao, and 蔡家豪. "Study of a 10kW Multi-Phase Digital-Controlled DC/DC Converter for Fuel Cell Applications." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/c2h6a2.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>99<br>Recently, clean energy resources such as solar cell, wind turbine or fuel cell have been exploited for developing renewable electric power generation systems. The fuel cell is considered as the most clean energy technology. Its major advantages include low noise, low pollution, high efficiency, and easy replacement. However, the fuel cell stacks present low voltage output and wide range of voltage variation. In order to provide load a constant source, a step-up DC-DC converter must be inserted between the fuel cell stack and the load. In this thesis, the adopte

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Feng, Yi-Hsin, and 馮毅昕. "Three-Phase Multi-Level Y-Y Connection Bi-Directional Series-Series Resonant DC-DC Converter." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/9ucj8t.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>106<br>This thesis presents Three-Phase Multi-Level Y-Y connection Bi-Directional Series-Series Resonant DC-DC Converter. The voltage stress of the power switch is equal to half of the input voltage. Therefore, it is suitable for high input-voltage applications, and is easy to choose the power switch device, it also has the benefit of reducing output voltage and current ripple. This article will introduce the principle of Three-Phase Multi-Level Y-Y connection Bi-Directional Series-Series Resonant DC-DC Converter. On secondary side, synchronous rectification is added

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Chang, Jie_Kuan, and 張介寬. "Implementation of Phase-Shift Full-Bridge DC/DC Power Converter." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/26139847877372803567.

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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>In this paper, a non-isolated gate driver circuit is developed for driving the power electronic switches of the diode-clamped three-level power converter, and a phase-shift full-bridge DC/DC power converter is also developed. The developed non-isolated gate driver circuit is composed of the bootstrap-type charge pump circuit and discrete electronic devices. A voltage source using bootstrap charge pump circuit is used to generate four isolated power supplies and four pulse-width modulation signals using a constant current couple mode are used for shifting the

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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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Chou, Hung-Ming. "Multi-port DC-DC Power Converter for Renewable Energy Application." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-837.

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In recent years, there has been lots of emphasis put on the development of renewable energy. While considerable improvement on renewable energy has been made, there are some inherent limitations for these renewable energies. For example, for solar and wind power, there is an intermittent nature. For the fuel cell, the dynamics of electro-chemical reaction is quite slow compared to the electric load. This will not be acceptable for modern electric application, which requires constant voltage of constant frequency. This work proposed and evaluated a new power circuit that can deal with the probl

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Lusney, John Travis. "Novel Digital Controller for Multi Full-Bridge DC/DC Converter." Thesis, 2007. http://hdl.handle.net/1974/716.

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Distributed generation that utilizes 5-10kW Solid Oxide Fuel Cells requires power electronics to optimize the overall system efficiency while reducing the cost. The Adaptive Energy Zero-Voltage-Switching Phase-Shift-Modulated Full-Bridge (AE-ZVS-PSM-FB) topology meets these criteria under all loading conditions, but suffers from complexity associated with an analog control implementation. This thesis presents a novel Look-Up-Table (LUT) based digital controller required for such converter. The applied design approach also reduces the design time and controller requirements, which in turn de

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Yang, Zhen-Yu, and 楊鎮宇. "Multi-objective Optimization for RCD Snubber of DC-DC Converter." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/83877765414325253465.

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碩士<br>國立高雄第一科技大學<br>系統資訊與控制研究所<br>100<br>In this paper, we propose that Multi-objective algorithm and the Taguchi method be employed in the optimal design of a DC-DC converter with an RCD snubber. The RCD snubber is usually used in flyback converter to limit the voltage spikes which are caused by leakage inductance of the transformer. The design considerations of RCD snubber are commonly two objectives: (1) minimize power loss in the snubber ; (2) minimize the voltage spikes across the transistor. But the RCD design consideration for voltage spikes suppression is usually in contradiction with

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Chen, Yan-Ru, and 陳彥儒. "A Voltage-mode PWM Dual-phase DC-DC Boost Converter with Phase Shedding." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/8tucf8.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>107<br>In recent years, the dc-dc converter output current needs to be higher in the power management systems. The traditional dc-dc converters uses a single power stage. However, if a single power stage is used to output a higher output current may cause the inductor to withstand a lager current that makes input capacitor current ripple and inductor volume larger. In order to solve this problem, the power stages in parallel are adopted instead that spreads the input current evenly to each of power stage to reduce current on the inductor thereby reducing the inducto

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Yancey, Billy Ferrall. "Performance Evaluation of a Multi-Port DC-DC Current Source Converter for High Power Applications." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7789.

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With the ever-growing developments of sustainable energy sources such as fuel cells, photovoltaics, and other distributed generation, the need for a reliable power conversion system that interfaces these sources is in great demand. In order to provide the highest degree of flexibility in a truly distributed network, it is desired to not only interface multiple sources, but to also interface multiple loads. Modern multi-port converters use high frequency transformers to deliver the different power levels, which add to the size and complexity of the system. The different topological variations o

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Deepak, G. "Integrated Magnetics Based DC-DC Converter Topologies For A DC Micro-Grid." Thesis, 2012. https://etd.iisc.ac.in/handle/2005/2310.

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In the present day, owing to the increasing number of electronic loads such as computer power supplies, Compact fluorescent lamps (CFL) and the increasing number of sources such as solar photovoltaics, fuel cells (DC sources), DC Micro-grids provide a more efficient solution compared to the AC counterpart in terms of the number of stages involved in conversion. Also, the ability to be readily buffered to storage elements is an advantage in a DC system. Apart from this, there are no issues of frequency stability, reactive power transfer and ac power losses. A DC micro-grid is effectively a mul

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Deepak, G. "Integrated Magnetics Based DC-DC Converter Topologies For A DC Micro-Grid." Thesis, 2012. http://etd.iisc.ernet.in/handle/2005/2310.

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Abstract:

In the present day, owing to the increasing number of electronic loads such as computer power supplies, Compact fluorescent lamps (CFL) and the increasing number of sources such as solar photovoltaics, fuel cells (DC sources), DC Micro-grids provide a more efficient solution compared to the AC counterpart in terms of the number of stages involved in conversion. Also, the ability to be readily buffered to storage elements is an advantage in a DC system. Apart from this, there are no issues of frequency stability, reactive power transfer and ac power losses. A DC micro-grid is effectively a mult

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Kuo, Chung-wei, and 郭忠韋. "DESIGN AND IMPLEMENTATION OF A 16 PHASE DC/DC BUCK CONVERTER." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/45639020549716818024.

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碩士<br>大同大學<br>電機工程學系(所)<br>98<br>ABSTRACT As the power consumption of microprocessors increase, a multi-phase voltage regulator is required to meet the power hunger and high efficiency requirements. In this thesis, in order to design and implementation of a 16 phase DC/DC buck converter, phase extender is applied on the power module of CPU on the motherboard. In general, the higher the phase number count, the more PWM outputs are required for the PWM controller. Consequently, developing a multi-phase PWM controller becomes very challenging and requires a high pin count package, resulting in

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Lee, Kuo-Pao, and 李國葆. "Four-Phase Digital Pulse Width Modulation for Switching DC-DC Converter." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/04370010389678698552.

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碩士<br>國立交通大學<br>電機學院碩士在職專班電機與控制組<br>97<br>The purpose of the thesis is to implement a fully digital pulse width modulation controlled DC to DC converter. This thesis is also aimed at building a mathematical effective module equal, circuit characterization and implementation to the fully digital pulse width modulation controlled DC to DC converter. The thesis uses a ready ADC device to sample the input voltage and output an Error. The Error sends to a pre-calculated lookup-table PID controller and output a pulse width modulation result. After the result processed by a four-phase buck converter

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Su, Chien-Chung, and 蘇建中. "Design of a Dual-phase Voltage-mode DC-DC Buck Converter." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/264jbg.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>107<br>In recent years, technology has developed rapidly, and electronic products have become thinner and can use many functions at the same time. Lithium batteries need to provide many voltages to different system modules at the same time, and the usage time will be shortened as the power consumption becomes larger. An effective power management system is an important thing in a limited volume and battery capacity. A good power management system can extend the life of the product and reduce the frequency of battery charging. In view of the above mentioned problems

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Hsu, Lan-Ting, and 許嵐婷. "Modeling and Control of a Multi-Phase Step-Up DC/DC Converter with Low Switch Voltage Stress." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/33656679231194366909.

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碩士<br>國立清華大學<br>電機工程學系<br>96<br>In recent years, with global energy shortage and strong environmental movements, many countries are encouraging and promoting the development of distributed energy sources such as fuel cells and renewable energies. As important roles in new energy, however, the output voltage of the solar cells and the fuel cells is rather low. Hence, a high step-up dc/dc converter is normally required as an interface to increase voltage for back-end applications. Therefore, emphasis of this thesis is placed on developing a high efficiency and high step-up dc/dc converter for th

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Dharmarajan, Vimala. "Three-level soft-switched DC-to-DC converter and single-phase, single-stage, three-level AC-to-DC converter." Thesis, 2006. http://hdl.handle.net/1828/2335.

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This thesis proposes a three-level DC-to-DC converter with capacitive output filter and its extension to single-phase, single-stage, three-level AC-to-DC converter with capacitive output filter. The AC-to-DC converter integrates a three-level boost converter operating in discontinuous conduction mode (DCM) and a three-level half-bridge DC-to-DC converter with capacitive output filter. The steady-state operation of the DC-to-DC converter and AC-to-DC converter with capacitive output filter are studied with phase-shifted gating scheme. The three-level topology reduces the voltage rating of the

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SHIH, BO-CHEN, and 施柏辰. "Asymmetric Multi-Level DC-DC Power Converter Based On Board Charger." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/83977r.

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碩士<br>國立高雄應用科技大學<br>電機工程系博碩士班<br>104<br>This thesis investigates an asymmetric multi-level dc-dc power converter based on board charger. This charger consists of a rectifier , a boost dc-dc converter and an asymmetric multi-level dc-dc power converter. A digital signal processors(DSP) is used to control the on board charger. The boost dc-dc converter has the performance of power factor correction and stabilizing the output capacitor voltage. The proposed asymmetric multi-level dc-dc converter is superior to the conventional multi-level dc-dc power converter due to improvement of energy efficie

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Tsai, Cheng-Han, and 蔡承翰. "Applying FPGA Control Without ADC to Multi-Output DC-DC Converter." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/qynnck.

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碩士<br>國立臺北科技大學<br>電機工程系研究所<br>97<br>In this thesis, the forward converter with multiple outputs is used to realize a system with fully-digitalized control without any analog-to-digital converter (ADC) used. In such a circuit, each output voltage can regulate itself via feedback control. Aside from this, the output voltage with the largest output current takes not only voltage control but also interleaved control and current sharing control. If such a system takes fully-digital control, then the number of ADCs used is large and hence the corresponding cost is expensive. Therefore, the sampling

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Ko, Po Jen, and 柯柏任. "Design and Implementation of High Power Bidirectional Dual-Phase DC-DC Converter." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/59186179649025776489.

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碩士<br>長庚大學<br>電機工程學系<br>98<br>This thesis designs and implements a hard-switching high power bidirectional dual-phase dc-dc converter. The converter accomplishes high power density operation in boost mode and buck mode. The maximum operating efficiency and power losses allocation of circuit elements used in the converter are also explored. EMI in the converter is also considered and reduced by using turn-off snubber circuits. In order to obtain high conversion efficiency under high power operating situation, this thesis discuses the specifications selection of circuit elements used in the conv

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