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Dissertations / Theses on the topic 'AC Power Converters'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Kwak, Sangshin. "Design and analysis of modern three-phase AC/AC power converters for AC drives and utility interface." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2336.

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Significant advances in modern ac/ac power converter technologies and demands of industries have reached beyond standard ac/ac power converters with voltage-source inverters fed from diode rectifiers. Power electronics converters have been matured to stages toward compact realization, increased high-power handling capability, and improving utility interface. Modern ac/ac power converter topologies with various control strategies have been introduced for the further improvements, such as matrix converters, current-fed converters, PWM rectifiers, and active power filters. In this dissertation, s

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2

Pickert, Volker. "Assessment of novel power electronic converters for drives applications." Thesis, University of Newcastle Upon Tyne, 1999. http://hdl.handle.net/10443/498.

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In the last twenty years, industrial and academic research has produced over one hundred new converter topologies for drives applications. Regrettably, most of the published work has been directed towards a single topology, giving an overall impression of a large number of unconnected, competing techniques. To provide insight into this wide ranging subject area, an overview of converter topologies is presented. Each topology is classified according to its mode of operation and a family tree is derived encompassing all converter types. Selected converters in each class are analysed, simulated a

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3

Santiago-González, Juan Antonio. "Miniaturization of Ac-Dc power converters for grid interface." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120371.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 185-189).<br>In this thesis we present a two-stage ac/dc grid-connected converter for computer applications. Also known as off-line power supplies, these converters have to meet various demanding specifications such as a wide

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4

Alexandros, Kordonis. "DYNAMIC ANALYSIS AND MODELING OF AC/AC POWER CONVERTERS FOR APPLICATIONS TO SMART-GRID SOLUTIONS." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/199313.

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5

Anderson, Glenn Warwick Jan. "Hybrid simulation of AC-DC power systems." Thesis, University of Canterbury. Electrical and Computer Engineering, 1995. http://hdl.handle.net/10092/1176.

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Transient stability studies are primarily concerned with the generator response of ac power systems and use only steady state type equations to model HVdc converter terminals. These equations are adequate for small disturbances at the converter terminals but cannot accurately represent a converters behaviour during, and through its recovery of, a significant transient disturbance. A detailed three phase electromagnetic analysis is necessary to describe the converters correct behaviour. This thesis describes an accurate and effective hybrid method combining these two types of studies, fo

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6

Rodríguez, Cuauhtémoc. "Design, stability, and control of photovoltaic ac module power converters." Thesis, University of Cambridge, 2006. https://www.repository.cam.ac.uk/handle/1810/252020.

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7

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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8

Hamed, Ibrahim. "Comparison between Active and Passive AC-DC Converters For Low Power Electromagnetic Self-Powering Systems : A theoretical and experimental study of low power AC-DC converters." Thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-39600.

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Electromagnetic based energy harvesting systems such as Variable reluctance energy harvesting systems (VREH) have shown to be an effective way of extracting the energy of rotating parts. The transducer can provide enough power to run an electronic sensing system, but the problem arises in finding an efficient way of rectifying that power to generate a stable energy supply to run a system, which this report will investigate. Active and passive voltage doublers have proven to be a suitable candidate in solving this issue due to the simplicity and the small footprint. This thesis will aim to comp

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9

Woods, Joseph. "The parallel connection of single phase DC to AC power converters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ39102.pdf.

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10

Sadler, Peter Andrew. "Harmonic elimination and voltage control in three phase AC power converters." Thesis, Manchester Metropolitan University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285285.

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11

Rizzoli, Gabriele <1987&gt. "Development of DC/AC power converters for applications requiring high efficiency." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7292/1/Rizzoli_Gabriele_Tesi.pdf.

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Silicon-based power devices have dominated power electronics applications over the last decades. Research and development in microelectronics have pushed the performance of power devices to face some fundamental limitations of silicon material. Wide band-gap semiconductors, such as silicon carbide, offer a solution to the pressing energy efficiency performance requirements of power electronic systems. Silicon carbide power devices can operate at higher temperatures, higher frequencies, and generate less power losses as compared to traditional silicon-based technologies. The use of wide band-

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12

Rizzoli, Gabriele <1987&gt. "Development of DC/AC power converters for applications requiring high efficiency." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7292/.

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Silicon-based power devices have dominated power electronics applications over the last decades. Research and development in microelectronics have pushed the performance of power devices to face some fundamental limitations of silicon material. Wide band-gap semiconductors, such as silicon carbide, offer a solution to the pressing energy efficiency performance requirements of power electronic systems. Silicon carbide power devices can operate at higher temperatures, higher frequencies, and generate less power losses as compared to traditional silicon-based technologies. The use of wide band-

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13

Haryani, Nidhi. "Zero Voltage Switching (ZVS) Turn-on Triangular Current Mode (TCM) Control for AC/DC and DC/AC Converters." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/96397.

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One of the greatest technological challenges of the world today is reducing the size and weight of the existing products to make them portable. Specifically, in electric vehicles such as electric cars, UAVs and aero planes, the size of battery chargers and inverters needs to be reduced so as to make space for more parts in these vehicles. Electromagnetic Interference (EMI) filters take up a more than 80 % of these power converters, the size of these filters can be reduced by pushing the switching frequency higher. High frequency operation (> 300 kHz) leads to a size in reduction of EMI filters

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14

Wang, Qiong. "Form-Factor-Constrained, High Power Density, Extreme Efficiency and Modular Power Converters." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/86445.

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Enhancing performance of power electronics converters has always been an interesting topic in the power electronics community. Over the years, researchers and engineers are developing new high performance component, novel converter topologies, smart control methods and optimal design procedures to improve the efficiency, power density, reliability and reducing the cost. Besides pursuing high performance, researchers and engineers are striving to modularize the power electronics converters, which provides redundancy, flexibility and standardization to the end users. The trend of modularization

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15

Alam, Md Muntasir Ul. "Investigation of bridgeless single-phase solutions for ac-dc power factor corrected converters." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/62355.

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In modern power supplies and battery chargers, a front-end power factor correction (PFC) AC-DC converter is used to comply with regulatory requirements for input current harmonics. The prevalence of standards and recommended practices to meet harmonic current limits has gained, and continues to gain, momentum over recent years. Additionally, the improvement of overall converter efficiency is critical for the emergence and acceptance of these converter technologies, to meet the standard of efficiency and power factor requirements. This dissertation presents some innovative solutions for bridge

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16

Atighechi, Hamid. "Dynamic average-value model of high power ac-dc converters and HVDC systems." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44578.

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High power switching converters such as line-commutated converters (LCC) and high voltage direct current (HVDC) systems are widely used in modern energy grids for interconnection of industrial loads, large motor drives, as well as electronically-interfaced renewable/alternative/distributed energy resources (DER) and storage systems. For design and analysis of systems with power-electronic-based DERs and loads, accurate and efficient computer models are essential. This thesis is focused on dynamic average-value models (AVM) that neglect switching of converter circuits and are established by av

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17

Wang, Xinxin. "Design and implementation of internal model based controllers for DC/AC power converters." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/7628.

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The aim of this thesis is to design and implement an advanced control system for a working three-phase DC to AC power converter. Compared to the traditional PI controller used widely in industry, the new voltage controller can track the reference voltage with improved accuracy and efficiency in the presence of different kind of local loads, and also works well in the single phase voltage control. This voltage controller is combined with a power controller to yield a complete controller. An important aspect of this work is the hardware implementation of the whole system. Main parts of this thes

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18

Rustom, Khalid. "STEADY STATE AND DYNAMIC ANALYSIS AND OPTIMIZATION OF SINGLE-STAGE POWER FACTOR CORRECTION CONVERTERS." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2216.

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With the increased interest in applying Power Factor Correction (PFC) to off-line AC-DC converters, the field of integrated, single-stage PFC converter development has attracted wide attention. Considering the tens of millions of low-to-medium power supplies manufactured each year for today's rechargeable equipment, the expected reduction in cost by utilizing advanced technologies is significant. To date, only a few single-stage topologies have made it to the market due to the inherit limitations in this structure. The high voltage and current stresses on the components led to reduced efficien

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19

Bulhosa, João Paulo Rodrigues. "Controlo de um conversor AC-DC-AC para turbinas eólicas baseadas no PMSG." Master's thesis, Instituto Politécnico de Bragança, Escola Superior de Tecnologia e de Gestão, 2009. http://hdl.handle.net/10198/2062.

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A dissertação teve como objectivo o estudo e implementação do controlo de um conversor AC-DC-AC, constituído por um conversor DC/DC elevador e um inversor de tensão monofásico, para efectuar a ligação à rede de turbinas eólicas baseadas no gerador síncrono de ímanes permanentes. O controlo global do conversor AC-DC-AC seguiu uma estratégia na qual o controlo do conversor elevador e do inversor de tensão monofásico é implementado de modo independente. O primeiro visa maximizar a potência extraída da turbina através da implementação de um algoritmo de seguimento do ponto de potência máxima (MPP

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20

Dong, Dong. "Ac-dc Bus-interface Bi-directional Converters in Renewable Energy Systems." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/28495.

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This dissertation covers several issues related to the ac-dc bus-interface bi-directional converters in renewable energy systems. The dissertation explores a dc-electronic distribution system for residential and commercial applications with a focus on the design of an ac-dc bi-directional converter for such application. This converter is named as the â Energy Control Centerâ due to its unique role in the system. First, the impact of the unbalanced power from the ac grid, especially the single-phase grid, on the dc system operation is analyzed. Then, a simple ac-dc two-stage topology and an

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21

Natsheh, Ammar Nimer. "Analysis, simulation and control of chaotic behaviour and power electronic converters." Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/5739.

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The thesis describes theoretical and experimental studies on the chaotic behaviour of a peak current-mode controlled boost converter, a parallel two-module peak current-mode controlled DC-DC boost converter, and a peak current-mode controlled power factor correction (PFC) boost converter. The research concentrates on converters which do not have voltage control loops, since the main interest is in the intrinsic mechanism of chaotic behaviour. These converters produce sub-harmonics of the clock frequency at certain values of the reference current I[ref] and input voltage V[in], and may behave i

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22

Magalhães, de Oliveira Marcio. "Power Electronics for Mitigation of Voltage Sags and Improved Control of AC Power Systems." Doctoral thesis, KTH, Electric Power Systems, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3018.

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<p>The thesis deals with the application of compensators andswitches based on power electronics in AC transmission anddistribution systems. The objective of the studieddevices/equipment is the power flow and voltage control intransmission systems and the mitigation of voltage sags andmomentary interruptions to critical loads in distributionsystems.</p><p>For validating the power electronics based devices/equipmentdescribed in the thesis, scaled models at a real-time simulatorhave been built. Simulation results of these models arepresented and discussed in the thesis.</p><p>The equipment studie

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23

Malan, Wynand Louis. "Design, modelling and control of CLC Tee-Resonant Dual Active Bridge Converters." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/200329/1/Wynand_Malan_Thesis.pdf.

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Tee-Resonant Dual Active Bridges are isolated, bidirectional, DC-DC converters that behave as voltage-controlled current sources, which makes them especially useful for battery charging applications. In this work, three new phase-shift modulation strategies are proposed that can improve the converter efficiency at high switching frequencies and enable loss-shifting between the primary and secondary sides. To model the converter, a large signal state-space model is derived and it is demonstrated to be useful for controller design. Lastly, a converter topology is proposed that enables direct int

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24

Sastry, Jyoti. "Direct AC control of grid assets." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41109.

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The objective of the proposed research is to investigate feasible approaches to dynamic control of the power grid. Growth in the demand for electric power, and an increase in the penetration of renewable energy resources are causing congestion on an already aging power grid. Conventional grid control involves the use of static assets that operate on long time scales. These assets provide no dynamic control on the grid, and are typically used for scheduled support. Existing solutions (FACTS devices) to dynamic grid control have seen minimal market penetration because of high cost and low re

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25

Musavi, Fariborz. "Investigation of high performance single-phase solutions for AC-DC power factor corrected boost converters." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/35082.

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Plug-in Hybrid Electric Vehicles (PHEVs) and Electric Vehicles (EVs) are an emerging trend in automotive circles, and consumer’s interest is growing rapidly. With the development of PHEVs, battery chargers for automotive applications are becoming a large market for the power supply industries. The improvement of overall charger efficiency is critical for the emergence and acceptance of these vehicular technologies, as the charger efficiency increases, the charge time and utility cost decreases. Additionally, to meet the efficiency and power factor requirements and regulatory standards for the

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26

Lopez, Santos Oswaldo. "Contribution to the DC-AC conversion in photovoltaic systems : Module oriented converters." Thesis, Toulouse, INSA, 2015. http://www.theses.fr/2015ISAT0001/document.

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Ces dernières années, un intérêt croissant pour les systèmes électroniques de puissance a été motivé par l'émergence de sources d'énergie distribuées et renouvelables raccordées aux réseaux électriques. Dans ce contexte, la nécessité de topologies de faibles puissances alimentées par quelques modules photovoltaïques, en évitant l'utilisation de transformateurs, a ouvert l'étude de convertisseurs spéciaux et l’étude des stratégies de commande associées afin d’assurer la stabilité, la fiabilité et un rendement élevé du dispositif. Une possible solution est d’utiliser un dispositif générique conn

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27

Louganski, Konstantin. "Generalized Average-Current-Mode Control of Single-Phase AC-DC Boost Converters with Power Factor Correction." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/27331.

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The dissertation presents a generalized average-current-mode control technique (GACMC), which is an extension of the average-current-mode control (ACMC) for single-phase ac-dc boost converters with power factor correction (PFC). Traditional ACMC is generalized in a sense that it offers improved performance in the form of significant reduction of the current control loop bandwidth requirement for a given line frequency in unidirectional and bidirectional boost PFC converters, and additional functionality in the form of reactive power control capability in bidirectional converters. These feature

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28

Alves, Montanari Allan. "Enhanced instantaneous power theory for control of grid connected voltage sourced converters under unbalanced conditions." IEEE Transactions on Power Electronics, 2017. http://hdl.handle.net/1993/32184.

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This thesis introduces a new method especially designed to control the instantaneous power in voltage sourced converters operating under unbalanced conditions, including positive, negative and zero sequence content. A transformation technique, labelled mno transformation, was developed to enable the decomposition of the total instantaneous power flowing on three-phase transmission topologies into constant and oscillating terms. It is applied to three-wire and four-wire schemes, especially accommodating zero sequence unlike previous approaches. Classical and modern electric power theories are p

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29

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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30

Chen, Weilun Warren. "Bidirectional Three-Phase AC-DC Power Conversion Using DC-DC Converters and a Three-Phase Unfolder." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/6905.

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Strategic use of energy storage systems alleviates imbalance between energy generation and consumption. Battery storage of various chemistries is favorable for its relatively high energy density and high charge and discharge rates. Battery voltage is in dc, while the distribution of electricity is still predominantly in ac. To effectively harness the battery energy, a dc-ac inverter is required. A conventional inverter contains two high-frequency switching stages. The battery-interfacing stage provides galvanic isolation and switches at high frequency to minimize the isolation transformer size

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31

Yilmaz, Hasan. "Design, Application And Comparison Of Single Stage Flybackand Sepic Pfc Ac/dc Converters For Power Led Lighting Application." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615097/index.pdf.

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In this work, single stage power factor corrected AC/DC converters for LEDs<br>single stage Flyback converter having different configuration from the traditional Flyback and single stage SEPIC converter is investigated. The study involves analysis, circuit design, performance comparisons and implementation. The study covers LEDs<br>their developments, characteristics and state-of-art in this new technology. The circuits are investigated by means of computer simulations. Operating principles and operating modes are studied along with design calculations. After applying prototypes in laboratory,

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32

Hamdad, Fatemeh-Soheila. "Three-phase AC-to-DC soft-switching HF transformer isolated converters with power factor correction and low harmonic distortion." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0005/NQ40540.pdf.

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33

Kalyani, Radha Padma. "A nonlinear optimization approach for UPFC power flow control and voltage security." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.mst.edu/thesis/pdf/Kalyani_completeThesis_09007dcc80438f59.pdf.

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Thesis (Ph. D.)--University of Missouri--Rolla, 2007.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed November 29, 2007) Includes bibliographical references.

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34

Sichirollo, Francesco. "Novel Offline Switched Mode Power Supplies for Solid State Lighting Applications." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3426640.

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In recent years, high brightness light emitting diodes (HBLEDs) have increasingly attracted the interest of both industrial manufacturers and academic research community. Among the several aspects that make LED technology so attractive, the most appreciated characteristics are related to their robustness, high efficiency, small size, easy dimming capability, long lifetime, very short switch-on/switch-off times and mercury free manufacturing. Even if all such qualities would seem to give to solid state lighting a clear advantage over all the other kinds of competing technologies, the issues de

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35

Ghita, Ion. "Commande avancée de convertisseurs de puissance : application aux réseaux électriques embarqués." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC061.

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Dans les dernières années, le respect de l’environnement est devenu une des grandes préoccupations des clients du secteur automobile. Les constructeurs cherchent à réduire les émissions carbones de ses produits et les véhicules hybrides ou purement électriques apparaissent comme une alternative viable aux véhicules thermiques. Un des éléments importants de la réussite de la commercialisation des véhicules électriques est la recharge de la batterie qui peut être effectuée par différents moyens, avec des chargeurs embarqués/débarqués, à domicile ou sur la voie-publique. Dans ce domaine un systèm

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36

Zhao, Huiying. "Regulation and Control of AC Microgrid Systems with Renewable Generation and Battery Energy Storage System." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1536342769000338.

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Gruson, François. "Modulation naturelle généralisée des convertisseurs matriciels pour la variation de vitesse." Thesis, Ecole centrale de Lille, 2010. http://www.theses.fr/2010ECLI0027/document.

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La variation de vitesse des machines électriques est une application très porteuse de l’électronique de puissance. La solution de conversion la plus répandue consiste à connecter en cascade deux convertisseurs statiques et d’effectuer une double conversion (AC/DC/AC). Une autre solution, faiblement répandue dans l’industrie, effectue une conversion directe AC/AC. Ce mémoire effectue une synthèse sur les solutions de conversion directe ainsi que sur les stratégies de modulation des convertisseurs matriciels et matriciels « double étage » dans le but de piloter des machines électriques triphasée

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Zhang, YuQi. "ADVANCED SYNCHRONOUS MACHINE MODELING." UKnowledge, 2018. https://uknowledge.uky.edu/ece_etds/118.

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The synchronous machine is one of the critical components of electric power systems. Modeling of synchronous machines is essential for power systems analyses. Electric machines are often interfaced with power electronic components. This work presents an advanced synchronous machine modeling, which emphasis on the modeling and simulation of systems that contain a mixture of synchronous machines and power electronic components. Such systems can be found in electric drive systems, dc power systems, renewable energy, and conventional synchronous machine excitation. Numerous models and formulations

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Camara, Raphael Amaral da. "AnÃlise Comparativa de Desempenho para Conversores MonofÃsicos Utilizando FPGA para AplicaÃÃo em No-breaks." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=8716.

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nÃo hÃ<br>Esta tese de doutorado apresenta duas novas topologias de conversores CA-CC com uso de neutro comum: conversor de cinco nÃveis intercalado e conversor de cinco nÃveis tipo T. AlÃm disso, uma nova forma de implementaÃÃo da tÃcnica de controle indireto da corrente (Indirect Current Control - ICC) Ã apresentada. Assim, para comprovaÃÃo da praticidade dos conversores apresentados, toma-se como base o conversor CA-CC de trÃs nÃveis convencional e entÃo Ã realizada uma anÃlise comparativa de desempenho entre esses trÃs conversores CA-CC monofÃsicos para aplicaÃÃo em no-breaks. Os conversor

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40

Malo, Barragán Shane Leonardo. "Design and Control of an Electric Energy Conditioning System for a PEM Type Fuel Cell." Doctoral thesis, Universitat Politècnica de Catalunya, 2009. http://hdl.handle.net/10803/5957.

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Isolated electric energy generation systems are often needed to supply electric loads where the electrical network is not available. This could be caused due to geographic isolation, the necessity of load mobility, demanded values of voltage and current that are not compatible with the local networks, etc. This makes the design and construction of stand-alone energy generation systems a must.<br/><br/>Modern designs are being pushed towards cleaner technologies. The experience has shown that the usual methods employed to produce electrical energy are not sustainable, especially because of envi

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Boucherit, Ahmed. "Conception d'un convertisseur de puissance pour véhicules électriques multi-sources." Phd thesis, Université de Technologie de Belfort-Montbeliard, 2011. http://tel.archives-ouvertes.fr/tel-00823565.

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L'utilisation des plusieurs sources d'énergies de caractéristiques différentes, à bord du véhicule électrique VE) nécessite l'adoption de convertisseurs statiques. Ces derniers peuvent avoir la fonction de conditionneur 'énergie des différentes sources et/ou commander les machines électriques du véhicule.Généralement les VE disposent d'un bus continu " de quelques centaines de volts " dont la stabilité est assurée par un groupe de convertisseurs élévateurs de tension (du fait que les sources ont généralement un niveau de tension faible ; quelques dizaines de volts). Lors des démarrages/arrêts

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Mayes, Peter Richard. "A novel AC/DC bidirectional power converter." Thesis, University of Nottingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239439.

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Amirabadi, Mahshid. "Soft-Switching High-Frequency AC-Link Universal Power Converters with Galvanic Isolation." Thesis, 2013. http://hdl.handle.net/1969.1/151305.

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In this dissertation the ac-link universal power converters, which are a new class of power converters, are introduced and studied in detail. The inputs and outputs of these converters may be dc, ac, single phase, or multi-phase. Therefore, they can be used in a variety of applications, including photovoltaic power generation, wind power generation, and electric vehicles. In these converters the link current and voltage are both alternating and their frequency can be high, which leads to the elimination of the dc electrolytic capacitors and the bulky low-frequency transformers. Therefore, the

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Luo, Ye-Sing, and 羅業興. "Adaptive AC-DC Converters for Wireless Power Transmission." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/rj6w2w.

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博士<br>國立臺灣大學<br>電子工程學研究所<br>105<br>For the development of the Internet of Things (IoT), wearable devices, and implantable medical devices, the wireless power transmission is receiving significant attention. In these applications, the external power from a transmitter is transmitted by the coils / antennas, and an AC voltage will be received in a wireless device. To convert the AC voltage into a DC one for the device working, an AC-DC converter is widely adopted. The cores of the AC-DC converters usually use a diode-connected MOS transistor or a comparator-based active diode. However, the diode

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Lin, Houng-Min, and 林晃民. "High Power Factor Asymmetrical Half-Bridge AC/DC Converters." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/64173443455324736974.

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碩士<br>義守大學<br>電機工程學系碩士班<br>93<br>ABSTRACT The asymmetrical half-bridge converter has many advantages such as soft switching properties, lower switch loss, lower EMI, lower voltage and current stress. Besides, it has low output voltage ripple due to ting dead time. Therefore it is suitable for the DC/DC cell. By using boost-type converter as a PFC cell, high power factor can be achieved without additional controller for discontinue-conduction-mode operation. The operation principle and equivalent circuits of the single-stage AC/DC converter in every operating stage be described and analyzed in

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Chen, Re-Jue, and 陳仁傑. "Development of Three-phase Parallel DC-AC Power Converters." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/45350577051224790126.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>91<br>This thesis is concerned with the analysis and implementation of three-phase dc-to-ac power converters. The system consists of two three-phase three-leg parallel inverters. One of them is operated at voltage-controlled mode with double control loops. The inner-loop uses the feedback of capacitor current for speeding up the transient response, while the outer-loop is for output voltage regulation. The first system can thus provide stable AC voltage source with low harmonic distortion for linear as well as nonlinear loads. On the other hand, the second inverter i

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Yang, Lung-sheng, and 楊隆生. "Novel High-Power-Factor Buck/Boost AC/DC converters." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/52516179200725982035.

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博士<br>國立成功大學<br>電機工程學系碩博士班<br>96<br>The novel single-phase and three-phase power-factor-correction (PFC) AC/DC buck-boost converters are proposed in this dissertation. The novel PFC converters are operated in discontinuous conduction mode (DCM) by using a simple pulse-width modulation (PWM) control strategy to achieve good power quality, including almost unity power factor, purely sinusoidal input current and low total harmonic distortion of input current (THDi). For the novel single-phase PFC AC/DC buck-boost converter, this converter can be operated with larger duty-ratio range than the co

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Lin, Houng-min, and 林晃民. "High Power Factor Asymmetrical Half-Bridge AC/DC Converters." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/54364489181671925104.

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碩士<br>義守大學<br>電機工程學系碩士班<br>93<br>The asymmetrical half-bridge converter has many advantages such as soft switching properties, lower switch loss, lower EMI, lower voltage and current stress. Besides, it has low output voltage ripple due to ting dead time. Therefore it is suitable for the DC/DC cell. By using boost-type converter as a PFC cell, high power factor can be achieved without additional controller for discontinue-conduction-mode operation. The operation principle and equivalent circuits of the single-stage AC/DC converter in every operating stage be described and analyzed in detail. F

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Wang, Chia-wen, and 王嘉紋. "Developmetn of AC-DC-AC Power Converters with Floating-Point Digital Signal Processor." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/00203724931681493709.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>98<br>This thesis is concerned with the analysis and implementation of AC-DC-AC power converter with floating-point Digital Signal Processor. It provides better performance than traditional fix-point computation with simplified softwave development. The system voltage and current closed-loop control as well as overall system control strategies are conducted by softwave to reduce circuit component and improve system reliability. The input current harmonics and power factor of the AC-DC power converter are also improved. DC-link fixed-voltage control is adopted to main

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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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