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Dissertations / Theses on the topic 'Power Factor Corrected (PFC)'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Longo, Gaetano. "Analisi e simulazione di uno stadio power factor corrector per un alimentatore industriale." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Lo scopo è quello di migliorare l'assorbimento di rete di un alimentatore industriale, migliorandone fattore di potenza e distorsione armonica della corrente di rete. La tesi si concentra sull'analisi e la simulazione in Plecs di alcune tipologie di power factor corrector, in particolare: inverter trifase usato come raddrizzatore, filtro attivo e raddrizzatore Vienna. Per ogni soluzione sono state svolte simulazioni elettriche e termiche. Infine, vengono stimati i costi e i volumi di ogni PFC per fare un'analisi costi/benefici.

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2

Unal, Teoman. "Design Of A Single-phase Full-bridge Diode Rectifier Power Factor Corrector Educational Test System." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12608148/index.pdf.

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In this thesis an educational test bench for studying the power quality attributes of the commonly used single-phase full-bridge diode rectifiers with power factor correction (PFC) circuits is designed and tested. This thesis covers the active and passive power factor correction methods for single-phase bridge rectifier. Passive filtering approach with dc side inductor and tuned filter along with active filtering approach via singleswitch boost converter is considered. Analysis, simulation, and design of a single phase rectifier and PFC circuits is followed by hardware implementation and tests

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3

Daniele, Matteo. "A single-stage power factor corrected AC/DC converter." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0018/MQ39474.pdf.

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4

Ismail, Nasser. "A single stage full bridge power factor corrected AC/DC converter." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq26004.pdf.

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5

Fraser, Malcolm E. "Power factor-corrected transformerless three-phase PWM converter for UPS applications." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/33002.

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This thesis describes the research of a new transformerless three phase PWM converter for uninterruptible power supplies (UPS) applications. The removal of the bulky three phase transformer in larger power UPS can provide a significant saving in weight and cost of the overall system. The converter consists of a new four-wire rectifier coupled with a four-wire inverter via a dc bus. The supply and load neutral may be connected together without any neutral current flowing into the utility regardless of the load on the inverter. This allows the load to be at the same potential as the utility. The

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6

Grote, Tobias [Verfasser]. "Digital control for interleaved boost power factor correction (PFC) rectifiers / Tobias Grote." Paderborn : Universitätsbibliothek, 2014. http://d-nb.info/105184813X/34.

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7

Xie, Manjing. "Digital Control for Power Factor Correction." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34258.

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This thesis focuses on the study, implementation and improvement of a digital controller for a power factor correction (PFC) converter. The development of the telecommunications industry and the Internet demands reliable, cost-effective and intelligent power. Nowadays, the telecommunication power systems have output current of up to several kilo amperes, consisting of tens of modules. The high-end server system, which holds over 100 CPUs, consumes tens of kilowatts of power. For mission-critical applications, communication between modules and system controllers is critical for reliability. Inf

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8

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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9

Gamboa, Gustavo. "REALIZATION OF POWER FACTOR CORRECTION AND MAXIMUM POWER POINT TRACKING FOR LOW POWER WIND TURBINES." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4283.

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In recent years, wind energy technology has become one of the top areas of interest for energy harvesting in the power electronics world. This interest has especially peaked recently due to the increasing demand for a reliable source of renewable energy. In a recent study, the American Wind Energy Association (AWEA) ranked the U.S as the leading competitor in wind energy harvesting followed by Germany and Spain. Although the United States is the leading competitor in this area, no one has been able successfully develop an efficient, low-cost AC/DC convertor for low power turbines to be used by

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10

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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11

Huang, Weixing. "Design of a Radial Mode Piezoelectric Transformer for a Charge Pump Electronic Ballast with High Power Factor and Zero Voltage Switching." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/31818.

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In a conventional electronic ballast for a fluorescent lamp, inductor-capacitor-transformer tank circuit is used. A Piezoelectric Transformer (PT) can potentially be used to replace such a tank circuit to save space and cost. In the past, ballast design using a PT requires selecting a PT from available samples which are normally not matched to specific application and therefore resulting in poor performance. In this thesis, a design procedure was proposed for designing a PT tailored for a 120-V 32-W electronic ballast with high power factor, high efficiency and Zero-Voltage-Switching (ZVS) of

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12

Lee, Moonhyun. "Digital-Based Zero-Current Switching (ZCS) Control Schemes for Three-Level Boost Power-Factor Correction (PFC) Converter." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/99694.

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With the increasing demands on electronic loads (e.g. desktop, laptop, monitor, LED lighting and server) in modern technology-driven lives, performance of switched-mode power supply (SMPS) for electronics have been growing to prominence. As front-end converters in typical SMPS structure, ac-dc power-factor correction (PFC) circuits play a key role in regulations of input power factor, harmonics and dc output voltage, which has a decisive effect on entire power-supply performances. Universal ac-line and low-power system (90–264 Vrms, up to 300–400 W) is one of the most common power-supply speci

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13

Koh, Hyunsoo. "Modeling and Control of Single Switch Bridgeless SEPIC PFC Converter." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/34125.

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Due to increasing concerns on the power quality, power factor correction (PFC) has become an important issue in light-emitting diode (LED) lighting applications. A boost converter is one of the most well-known PFC topologies, due to its simple circuitry, simple control scheme and small number of passive components. Even though a boost converter is recognized as a typical PFC converter, its output voltage must be higher than its input voltage. This feature is disadvantageous because the device requires an additional buck-stage for LED lighting systems. As an alternative to the boost convert

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14

Miko, Radoslav. "Třífázový síťový napaječ s aktivním usměrňovačem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242035.

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Diploma thesis deals with problems of power factor correction and total harmonic distortion of line current in three phase industrial power supplies. It focuses mainly on using of single phase active PFC topologies based on the principle of step up converter, which are applicable to three phase systems. Verification of operation and comparison of parameters of several circuits was done by simulation in program Matlab Simulink. Then for selected circuit of active PFC was done complete design. The result is a prototype of single phase active PFC circuit with an output power 2 kW for input voltag

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JÃnior, JosÃ Ailton LeÃo Barboza. "A Double boost converter with PFC and series/parallel input connection for uninterrupted power system." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16257.

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fator de potÃncia e recurso para operar com dois valores de tensÃo de entrada. O mesmo Ã aplicÃvel a sistemas ininterruptos de energia do tipo dupla conversÃo ou on-line com caracterÃsticas de tensÃo de entrada bivolt (110 Vca e 220 Vca) e desta maneira Ã descartada a utilizaÃÃo de um autotransformador com seletor de tensÃo. O conversor em estudo Ã composto por dois conversores CA-CC boost clÃssicos, em que, para uma tensÃo de entrada de 110 Vca as entradas sÃo conectadas em paralelo e para uma tensÃo de entrada de 220 Vca as entradas sÃo conectadas em sÃrie. A ideia Ã fazer com que se tenha u

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16

Damasceno, Daniel da Motta Souto. "Metodologia de projeto de conversores boost para correção de fator de potência apliocada a sistemas ininterruptos de energia." Universidade Federal de Santa Maria, 2006. http://repositorio.ufsm.br/handle/1/8539.

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This Master Thesis presents a design methodology to a boost PFC converter operating as an Uninterruptible Power Supply rectifier input stage. This methodology defines, making use of a group of current ripples and switching frequencies, the converter minimum volume point analyzing the volumes of the boost inductor, the electromagnetic interference filter and the heat-sinks. Thus, it's developed along this work, each design mentioned above, analyzing the impact of different magnetic materiaIs, input filter topologies and semiconductors technologies. Previously, it is designed the controller and

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17

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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Zientarski, Jonatan Rafael Rakoski. "Análise, modelagem e validação experimental de uma metodologia para o projeto do indutor em conversores Boost PFC." Universidade Federal de Santa Maria, 2009. http://repositorio.ufsm.br/handle/1/8464.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This work presents the development of a methodology for design of inductor in singlephase PFC boost converters operating in CCM mode in agreement with international standards IEC 61000-3-2 and CISPR 22. Such converters are used in front-end modules of information technology equipment. This methodology is based on the investigation of the relationship among magnetic volume; switching frequency and input current ripple of the converter, presented in previous work and extended to allow the optimization of inductors with three magnetic

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19

Muhammad, Khairul Safuan Bin. "Design and Practical Implementation of Bridgeless Boost PFC Rectifier With Zero-Current Switching And Fault-Tolerant Operation." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14309.

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In this thesis, a new family of zero-current switching (ZCS) BBR with high power factor using only two active switches is proposed. The proposed BBR is based on a totem-pole BBR (TPBBR) configuration which allows the current to flow from high side to low side and vice versa during resonance. Hence, no auxiliary active switch is needed to provide soft-switching for all semiconductor devices. The soft-switching also reduces the body diode reverse recovery problem hence allows the TPBLB to operate in continuous conduction mode (CCM). Design considerations and parameter values calculations are giv

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20

Hertz, Erik M. "Thermal and EMI Modeling and Analysis of a Boost PFC Circuit Designed Using a Genetic-based Optimization Algorithm." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34234.

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The boost power factor correction (PFC) circuit is a common circuit in power electronics. Through years of experience, many designers have optimized the design of these circuits for particular applications. In this study, a new design procedure is presented that guarantees optimal results for any application. The algorithm used incorporates the principles of evolution in order to find the best design. This new design technique requires a rethinking of the traditional design process. Electrical models have been developed specifically for use with the optimization tool. One of the main foc

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21

Pham, Thi Thuy Linh. "Contribution à l’étude de nouveaux convertisseurs sécurisés à tolérance de panne pour systèmes critiques à haute performance. Application à un PFC Double- Boost 5 Niveaux." Thesis, Toulouse, INPT, 2011. http://www.theses.fr/2011INPT0095/document.

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Les conditionneurs alternatifs – continu à absorption sinusoïdale (PFC) pour les applications critiques se distinguent par un haut niveau de performances tel que les THD réduits, un haut rendement et une bonne fiabilité. Leur importance est d’autant plus nécessaire qu’une continuité de service des alimentations est requise même en présence d’une défaillance interne de composant. Deux types de structures associées à leur commande sont réalisés à cet effet, les structures à redondance parallèle et les structure à redondance en série. Elles consistent respectivement en l’ajout d’un bras d’interru

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22

Wang, Chuanyun. "Investigation on Interleaved Boost Converters and Applications." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/28635.

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With the rapid evolving IT technologies, today, the power factor correction (PFC) design is facing many challenges, such as power scalability, high entire-load-range efficiency, and high power density. Power scalability is a very desirable and cost-effective approach in the PFC design in order to keep up with serversâ growing power requirements. Higher power density can eventually reduce the converter cost and allows for accommodating more equipment in the existing infrastructures. Driven strongly by economic and environmental concerns, high entire-load-range efficiency is more and more requ

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23

Pham, Thi Thuy Linh. "Contribution à l'étude de nouveaux convertisseurs sécurisés à tolérance de panne pour systèmes critiques à haute performance. Application à un PFC Double- Boost 5 Niveaux." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2011. http://tel.archives-ouvertes.fr/tel-00656620.

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Ce travail vise une exploration et une évaluation de nouvelles variantes de topologies multiniveaux AC/DC non réversibles (PFC) du point de vue de leur sûreté de fonctionnement : recherche d'une grande sécurité électrique sur destruction interne et maintien d'une continuité de fonctionnement. Elles sont caractérisées par une connexion AC non différentielle, un partitionnement cellulaire en série et symétrique autour d'un point milieu. Cette organisation permet d'exploiter la redondance active série entre les cellules d'un même groupe et l'effet de ségrégation topologique qui apparaît entre les

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24

Sun, Jing. "New leading/trailing edge modulation strategies for two-stage AC/DC PFC adapters to reduce DC-link capacitor ripple current." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/5801.

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AC/DC adapters mostly employ two-stage topology: Power Factor Correction (PFC) pre-regulation stage followed by an isolated DC/DC converter stage. Low power AC/DC adapters require a small size to be competitive. Among their components, the bulk DC-link capacitor is one of the largest because it should keep the output voltage with low ripple. Also, the size of this capacitor is penalized due to the universal line voltage application. Synchronization through employing leading edge modulation for the first PFC stage and trailing edge modulation for the second DC/DC converter stage can significant

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25

Wu, Jia. "Implementation of a 100kW Soft-Switched DC Bus Regulator Based on Power Electronics Building Block Concept." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/32468.

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Power electronics building blocks (PEBBs) are standardized building blocks used to integrate power electronics systems. The PEBB approach can achieve low cost, high redundancy, high reliability, high flexibility and easy maintenance for large-scale power electronics systems. This thesis presents the implementation of a 100kW PEBB-based soft-switched bus regulator for an 800V DC distributed power system. The zero current transition (ZCT) soft-switching technique is used to improve the performance of the bus regulator by minimizing switching loss and improving overall efficiency. PEBB module

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26

Baisden, Andrew Carson. "Modeling and Characterization of Power Electronic Converters with an Integrated Transmission-Line Filter." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/33188.

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In this work, a modeling approach is delineated and described in detail; predominantly done in the time domain from low frequency, DC, to high frequencies, 100 MHz. Commercially available computer aided design tools will be used to determine the propagation path in a given structure. Next, an integrated transmission-line filter â fabricated using planar processing technologies â is modeled to accurately predict the EMI characteristics of the system. A method was derived to model the filterâ s performance in the time-domain while accurately depicting the highly frequency dependant trans

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27

Ewerling, Marcos Vinícius Mosconi. "Conversor CA-CC bridgeless monofásico de estágio único com PFC baseado no conversor SEPIC operando no modo de condução contínuo." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/3022.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Neste trabalho é apresentado a análise de um conversor CA-CC Bridgeless monofásico de estágio único com correção de Fator de Potência, baseado no conversor SEPIC isolado com os interruptores do lado CA. Para que o conversor exerça a técnica de correção de fator de potência, pelo fato de estar operando no modo de condução contínuo (MCC), é necessário controlar a corrente de entrada. Sendo assim, o sistema de controle, comparado caso o conversor operasse no modo de condução descontínuo (MCD), fica mais complexo, resultando em

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28

Krist, Jakub. "Spínaný napájecí zdroj." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-221027.

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The thesis is focused on design the switching power supply according to Push-pull topology rules. The work describes basic theoretic principles of Push-pull topology with design of circuit and circuit elements.

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Eleyele, Abidemi Oluremilekun. "Isolated Single-Stage Interleave Resonant PFC Rectifier with Active and Novel Passive Output Ripple Cancellation Circuit." Thesis, Uppsala universitet, Institutionen för elektroteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-423117.

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With the increasing demand for fast, cheaper, and efficient power converters come the need for a single-stage power factor correction (PFC) converter. Various single-stage PFC converter proposed in the literature has the drawback of high DC bus voltage at the input side and together with the shift to wide bandgap switches like GaN drives the converter cost higher. However, an interleaved topology with high-frequency isolation was proposed in this research work due to the drastic reduction in the DC bus voltage and extremely low input current ripple thereby making the need for an EMI filter cir

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30

Holub, Miroslav. "DC-DC měnič pro palubní dobíjení elektromobilu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-401968.

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This master thesis deals with design of DC-DC converter for onboard charging of electric vehicle. Developed converter will mainly be used for charging stationary traction battery in laboratory. Output voltage of this charger will be adjustable by user in between 200 V and 450 V depending on the current charged battery configuration. Output current limit is set at 8 A. Since the converter will be supplied from standard household socket, the problem of power factor correction must be solved during the design. That is because a large part of this thesis is focused on describing the problematics o

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Scapini, Rafael Zanatta. "Análise de estabilidade de retificadores com correção de fator de potência empregando modelos lineares periódicos no tempo." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/8517.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Many control techniques applied to converters with power factor correction (PFC) use cascaded control to compensate the output voltage and the input current. These techniques usually employ linear time-invariant (LTI) models and ignore the periodic output voltage oscillation by using compensator with low-pass characteristic. To ensure correlation between the rectifier and its LTI model, as well as power factor correction, these techniques reduce the crossing frequency, which result in a closed-loop voltage with poor dynamic respons

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32

Ozturk, Salih Baris. "Direct torque control of permanent magnet synchronous motors with non-sinusoidal back-EMF." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2728.

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Marzouk, Mounir. "Développement de chargeurs intégrés pour véhicules hybrides plug-in." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT088/document.

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Ces travaux de thèse consistent en la conception et la réalisation d’une chaîne de tractionintégrée pour véhicule hybride plug-in. L’étude s’oriente vers une solution de convertisseur mutualisé,dans l’objectif de partager la traction et les modes chargeurs de batteries, la structure en NPC à 3niveaux est retenue. Le chargeur monophasé se base une topologie de redresseur à MLI monophaséavec trois bras entrelacés, avec l’utilisation des enroulements du moteur pour le filtrage. En chargeurtriphasé nous adaptons la topologie pour réaliser un montage en double boost triphasé. Pour chaqueconfigurati

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Adabi, Firouzjaee Jafar. "Remediation strategies of shaft and common mode voltages in adjustable speed drive systems." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/39293/1/Jafar_Adabi_Firouzjaeel_Thesis.pdf.

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AC motors are largely used in a wide range of modern systems, from household appliances to automated industry applications such as: ventilations systems, fans, pumps, conveyors and machine tool drives. Inverters are widely used in industrial and commercial applications due to the growing need for speed control in ASD systems. Fast switching transients and the common mode voltage, in interaction with parasitic capacitive couplings, may cause many unwanted problems in the ASD applications. These include shaft voltage and leakage currents. One of the inherent characteristics of Pulse Width Modu

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Frost, Damien F. "A PFC Power Supply with Minimized Energy Storage Components and a New Control Ttechnique for Cascaded SMPS." Thesis, 2012. http://hdl.handle.net/1807/33727.

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This Master of Applied Science thesis proposes a new design of low power, power factor corrected (PFC), power supplies. By lifting the hold up time restriction for devices that have a battery built in, the energy storage elements of the converter can be reduced, permitting a small and inexpensive power converter to be built. In addition, a new control technique for controlling cascaded converters is presented, named duty mode control (DMC). Its advantages are shown through simulations. The system was proven using a prototype developed in the laboratory designed for a universal ac input voltage

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36

Leng, Tian Duo, and 冷天鐸. "Power-factor-corrected switching power supply." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/68470288347342661341.

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He, Yu-Ping, and 何宇平. "Development of Bridgeless Power-Factor-Corrected Rectifiers." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/v4d8wb.

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碩士<br>國立臺北科技大學<br>電機工程系所<br>103<br>In this thesis, a bridgeless buck power-factor-corrected (PFC) rectifier and a bridgeless buck-boost PFC rectifier are presented. These two circuits are designed to operate in the discontinuous conduction mode (DCM). Due to the DCM, the control of these PFC rectifiers is simple, easy of realization, of no slope compensation, with zero current switching, and without reverse recovery currents created from the diodes. Via output voltage sensing along with the traditional voltage-follower control, a suitable control effort for each PFC rectifier is created so as

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Chen, Sheng-Wen, and 陳聖文. "Power Factor Corrected LLC Half-Bridge Notebook Adapter." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/84202271771996566615.

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碩士<br>國立臺灣大學<br>電子工程學研究所<br>96<br>This thesis presents a LLC resonant adapter consisting of a front-stage power factor correction circuit and a second-stage half bridge DC-DC converter. The PFC circuit works in discontinuous conduction mode to correct power factor. The second-stage LLC resonant circuit has high conversion efficient characters of zero voltage switching on primary power switches and zero current switching on secondary rectifiers. The experiment result shows that the adapter has the highest efficiency at 93.2% and PF is above 0.96 as full load.

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Agamy, Mohammed S. "SINGLE STAGE POWER FACTOR CORRECTED THREE-LEVEL RESONANT CONVERTERS." Thesis, 2008. http://hdl.handle.net/1974/1011.

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In this thesis, a new approach for single-stage power factor correction converters is proposed to increase their power ratings to be in the multiple kilowatts levels. The proposed techniques are based on the utilization of modified three-level resonant converter topologies. These topologies provide low component stresses, high frequency operation, zero voltage switching, applicability under a wide range of input and output conditions as well as added control flexibility. The proposed control algorithms are based on a combination of variable frequency and asymmetrical pulse width modulation con

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Mohanty, P. R. "Power Factor Correction (PFC) of AC-DC system using boost-converter." Thesis, 2014. http://ethesis.nitrkl.ac.in/6151/1/E-64.pdf.

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In the present situation, the evolution of growing in computers, laptops, uninterrupted power supplies, telecom and biomedical equipment has become overpowering. Hence, the utilization of such equipment results high power consumption and small power density which provided a large market to Distributed Power System (DPS). Power conditioning; typically rectification is essential usually for electronics equipment. Rectifier behaves as nonlinear load producing non-sinusoidal line current due to the nonlinear input characteristic. There are numbers of international standards to limit the harmonic c

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Ismail, Nasser. "A single stage full bridge power factor corrected AC/DC converter." Thesis, 1996. http://spectrum.library.concordia.ca/193/1/MQ26004.pdf.

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Conventional single phase AC/DC converters use a two stage power configuration to provide a regulated DC power supply at high input power factor. Elimination of one of these stages can reduce the cost, weight, size, complexity and increase the overall reliability of this converter. This thesis proposes a single stage power factor correction converter circuit. This proposed converter circuit uses the traditional non-power-factor corrected circuit configuration with only few additional components. These are: an additional winding on the high frequency transformer, a small high frequency inductor

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Chiang, Chang-Hsun, and 江昶勳. "Power-Factor-Corrected Rectifier with Input Current Zero-Crossing Distortion Improved." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/tnu7fc.

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碩士<br>國立臺北科技大學<br>電機工程系所<br>102<br>As generally acknowledged, energy saving has two methods. One is to upgrade the efficiency of the product; the other is to improve its power factor and reduce its harmonic distortion. In the power electronics product, the harmonic current affects the power factor and creates the undesired noise and the additional power loss. Therefore, the International Electrotechnical Commission (IEC) released IEC 6100-3-2 harmonics standards in 2001, and accordingly the harmonic limits were described in detail. In these standards, if the electronics product has the output

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Chen, Chuen-Shiu, and 陳春旭. "The design of zero-voltage-transition(ZVT) power factor correction(PFC) circuit." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/16706264659421257343.

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"Accurate Estimation of Core Losses for PFC Inductors." Master's thesis, 2019. http://hdl.handle.net/2286/R.I.55521.

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abstract: As the world becomes more electronic, power electronics designers have continuously designed more efficient converters. However, with the rising number of nonlinear loads (i.e. electronics) attached to the grid, power quality concerns, and emerging legislation, converters that intake alternating current (AC) and output direct current (DC) known as rectifiers are increasingly implementing power factor correction (PFC) by controlling the input current. For a properly designed PFC-stage inductor, the major design goals include exceeding minimum inductance, remaining below the saturation

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Xu, Xiaojun. "Next generation power factor correction (PFC) based on silicon carbide (SiC) power devices and new control strategy." 2008. http://www.lib.ncsu.edu/theses/available/etd-11262008-173420/unrestricted/etd.pdf.

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Kommukuri, Vinaya Sagar. "Design and Implementation of Single Stage Bridgeless SEPIC Power Factor Corrected AC-DC Converter." Thesis, 2019. http://ethesis.nitrkl.ac.in/10047/1/2019_PhD_KVinayasagar_512EE1017_Design.pdf.

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Due to increase in modern power electronic systems the more emphasis is put on power quality. Nowadays, DC power supplies are widely used in most electronic equipment such as computers, battery chargers, variable frequency drives, and switch mode power supplies. The most commonly used AC-DC power supply configuration is diode bridge rectifier with bulk capacitor. This configuration involves substantial harmonics into the input side current resulting in poor power quality due to low power factor and high harmonic distortion. In fact, the substantial harmonics does not meet the regulatory standa

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Chen, Chi-Lin, and 陳契霖. "Triple Loop Modulation (TLM) for High Reliability and Efficiency in Power Factor Correction (PFC) System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/85164771988645998761.

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博士<br>國立交通大學<br>電控工程研究所<br>100<br>In general power applications, the power factor correction techniques is the one of key techniques in power saving applications and can make AC power more efficient. The PFC has slow system response because it has low one third or one sixth bandwidth smaller than 20 Hz. The low bandwidth is designed to reject AC interference of 60Hz coupling which could deteriorate system reliability in case of output load transient. This dissertation proposes the triple loop modulation (TLM) in PFC system to improve as fast transient response. When system is in steady state,

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Li, Yan-Cun, and 李彥村. "Boost and Buck-Boost Power-Factor-Corrected AC-to-DC Resonant Converters with ZVS Operation." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/ggv4e9.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>96<br>The research presents two novel high power factor ac-to-dc resonant converters with symmetrical topologies and zero-voltage-switching (ZVS) operation. The derived circuits are obtained from the integration of a dual-switch boost-type or buck-boost-type power factor corrector (PFC) into a half-bridge resonant converter. With symmetrical topology, the circuit is simple and the voltage and current stresses on the two active power switches are identical to each other. The PFC is operated at discontinuous conduction mode (DCM) to achieve unity power factor. The re

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Kuo, Huai-tien, and 郭懷天. "Design and Implementation of a Fully Digitally Controlled Single-stage Power Factor Corrected Full-bridge Converter." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/22994534646257967182.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>95<br>The thesis proposes the design and implementation of a fully digitally controlled full-bridge converter with power factor correction. The converter includes two major parts: a power factor correction circuit and a full bridge DC/DC converter. The zero switching technique is used to reduce the switching loss of the DC/DC converter. In addition, a single-stage power factor correction circuit is implemented to improve the power factor in the input AC source. The detailed discussion and analysis are included. An adjustable dead-time control method is proposed here

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Chen, Chien-Liang, and 陳建良. "Floating Full Bridge Phase Shift Driving Circuit with Power Factor Corrected for External Electrode Fluorescent Lamps." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/74225658499069841523.

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碩士<br>國立臺灣大學<br>電子工程學研究所<br>94<br>The aim of this thesis is to study and implement a high power factor floating full-bridge phase-shifted pulse-width-modulation converter for driving the external electrode fluorescent lamps. A high power factor and high efficiency is easily achieved by using a boost power factor corrector in the front stage to produce a high output voltage for the inverter stage. To attain a high conversion efficiency of the inverter, the phase shift full bridge converter which can achieve zero voltage switching operations is used. The external electrode fluorescent lamps whic

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