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Dissertations / Theses on the topic 'PFC converter'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 June 2025

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1

Kantzon, David. "PFC-design for frequency converter." Thesis, Linköpings universitet, Fysik och elektroteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-124547.

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This thesis deals with power factor correction for three-phase systems. A boost-buck topology was described, modeled and then simulated in MATLAB/Simulink. The simulation results show that the system provides a power factor over 99% over the tested power output range. Moreover, the harmonic injection concept was introduced which reduces the total harmonic distortion to 8.72% at full output power. A prototype system was also built using an FPGA for the control system. The prototype did not provide the performance seen in simulation but showed that the method is valid and does provide a higher p
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2

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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3

Matejov, Michal. "Pasivní PFC filtry pro spínané napájecí zdroje." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217598.

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This work deals with theory of switched power sources. There is description of the ways for connection and their practice purposes. In the next parts there are defined requirements on input supply circuit for these sources, especially for the form of output current. There are mentioned the basic connecting methods of PFC circuits and these methods modify the output current to meet the requirements of specification ČSN EN 61000- 3- 2. In the next parts there are shown simulations of PFC circuits made by Pspice application. Further is the basic description of sources construction for the sources
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4

JÃnior, Josà 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 à 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 à descartada a utilizaÃÃo de um autotransformador com seletor de tensÃo. O conversor em estudo à 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 à fazer com que se tenha u
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5

Wang, Qiong. "Design of Extreme Efficiency Active Rectifier for More-electric Aircrafts." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/78147.

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The More-electric aircraft (MEA) concept has been raised since 1990s in order to increase fuel economy and reduce environmental impact of aircrafts. The fundamental of the concept is to replace pneumatic, hydraulic and mechanical systems in conventional aircrafts with its electrical equivalent that is lighter and more reliable. In this movement, power electronics technology plays a key role in interfacing the new types of electrical loads to the new aircraft electrical power system. One of the major tasks for power electronics circuits in MEA is to transfer aircraft variable frequency AC volta
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6

Heidinger, Michael [Verfasser], and W. [Akademischer Betreuer] Heering. "Long Life Single Stage PFC/SLC Converter driving LEDs / Michael Heidinger ; Betreuer: W. Heering." Karlsruhe : KIT-Bibliothek, 2019. http://d-nb.info/1195049293/34.

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7

Cesar, Eduardo Lenz. "CONTROLE NÃO LINEAR DE UM PRÃ-REGULADOR ISOLADO COM PFC E ACOPLAMENTO AUXILIAR." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=6333.

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Este trabalho propÃe o estudo de uma nova topologia, com dois estÃgios, de um conversor estÃtico, onde existe um fluxo de potÃncia auxiliar com o objetivo de aumentar o rendimento do sistema. O primeiro estÃgio à um conversor CA-CC com correÃÃo do fator de potÃncia (PFC) e o segundo estÃgio à um conversor CC-CC isolado em alta frequÃncia. Os dois estÃgios do conversor proposto sÃo modelados por equaÃÃes diferenciais e atravÃs desses modelos sÃo desenvolvidas tÃcnicas de controle nÃo linear para o funcionamento dos conversores em malha fechada. A correÃÃo do fator de potÃncia do primeiro estÃgi
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8

Yang, Liyu. "Modeling and Characterization of a PFC Converter in the Medium and High Frequency Ranges for Predicting the Conducted EMI." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/35226.

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This thesis presents the conducted electro-magnetic interference (EMI) prediction results for a continuous conduction mode (CCM) power factor correction (PFC) converter as well as the theoretical analysis for the noise generation and propagation mechanisms. In this thesis, multiple modeling and characterization techniques in the medium and high frequency ranges are developed for the circuit components that are important contributors to the EMI noise, so that a detailed simulation circuit for EMI prediction can be constructed. The conducted EMI noise prediction from the simulation circuit clo
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9

Roggia, Leandro. "Estudo, controle e implementação do conversor Boost PFC operando no modo de condução mista." Universidade Federal de Santa Maria, 2009. http://repositorio.ufsm.br/handle/1/8475.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This Master Thesis presents the study and proposes a digital control system applied to the PFC boost converter operating in mixed conduction mode. The motivation to this subject, a bibliographic review of the existing current control techniques and the objectives of this work are presented in the first chapter. The control system is composed of a current loop, which has the objectives to provide low harmonic content to the input current and high power factor to the converter, and a voltage loop, which has the goal to regulate the o
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10

LI, QIANG. "A SINGLE-PHASE DUAL-OUTPUT AC-DC CONVERTER WITH HIGH QUALITY INPUT WAVEFORMS." UKnowledge, 2003. http://uknowledge.uky.edu/gradschool_theses/242.

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A single-phase, buck-boost based, dual-output AC-DC converter is studied in this thesis. The converter has two DC outputs with opposite polarities, which share the same ground with the input power line. The power stage performance, including the input filter, is studied and procedure to select power components is given. The circuit model is analyzed to develop appropriate control. Zerocrossing distortion of the source input current is addressed and a solution is proposed. Experimental results are satisfactory in that a high power factor line current results for steady-state operation.
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11

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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12

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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13

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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14

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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15

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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16

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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17

Lu, Bing. "Investigation of High-density Integrated Solution for AC/DC Conversion of a Distributed Power System." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/28128.

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With the development of information technology, power management for telecom and computer applications become a large market for power supply industries. To meet the performance and reliability requirement, distributed power system (DPS) is widely adopted for telecom and computer systems, because of its modularity, maintainability and high reliability. Due to limited space and increasing power consumption, power supplies for telecom and server systems are required to deliver more power with smaller volume. As the key component of DPS system, front-end AC/DC converter is under the pressure of c
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18

luo, zheng. "Investigation of High Performance AC/DC Front-End Converter with Digital Control for Server Applications." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/30905.

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With the development of information technology, the market for power management of telecom and computing equipment keeps increasing. Distributed power systems are widely adopted in the telecom and computing applications for the reason of high performance and high reliability. Recently industry brought out aggressively high efficiency requirements for a wide load range for power management in telecom and computing equipment. High efficiency over a wide load range is now a requirement. On the other hand, power density is still a big challenge for front-end AC/DC converters. For DPS systems, fron
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19

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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20

Wang, Kunrong. "High-Frequency Quasi-Single-Stage (QSS) Isolated AC-DC and DC-AC Power Conversion." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/29394.

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The generic concept of quasi-single-stage (QSS) power conversion topology for ac-dc rectification and dc-ac inversion is proposed. The topology is reached by direct cascading and synchronized switching of two variety of buck or two variety of boost switching networks. The family of QSS power converters feature single-stage power processing without a dc-link low-pass filter, a unidirectional pulsating dc-link voltage, soft-switching capability with minimal extra commutation circuitry, simple PWM control, and high efficiency and reliability. A new soft-switched single-phase QSS bi-directional i
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21

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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22

Guepratte, Kevin. "Onduleur triphasé à structure innovante pour application aéronautique." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00647128.

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En aéronautique, les contraintes sont telles que la masse des filtres peut représenterjusqu'à 50% de la masse totale du convertisseur. Ces dernières années, les convertisseursmulticellulaires parallèles entrelacés et magnétiquement couplés ont conduit à améliorer lesperformances des convertisseurs (densité de puissance, efficacité, dynamique,...). Denombreuses topologies de filtrages entrelacés existent, l'objectif principal de cette étude est detrouver parmi ces topologies celles qui sont les mieux adaptées à la réalisation d'un onduleurde tension 110Veff / 400Hz triphasé 25kVA. Il est démont
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Suarez, Buitrago Camilo Alexey [UNESP]. "Sistema de carregamento rápido de veículo elétrico puro." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/150572.

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Submitted by CAMILO ALEXEY SUAREZ BUITRAGO null (camiloalexey@gmail.com) on 2017-05-05T23:51:03Z No. of bitstreams: 1 CAMILO ALEXEY SUAREZ BUITRAGO.pdf: 4865572 bytes, checksum: e8593c9e425def26a441b4b919b9d371 (MD5)<br>Approved for entry into archive by Luiz Galeffi (luizgaleffi@gmail.com) on 2017-05-08T16:36:05Z (GMT) No. of bitstreams: 1 suarezbuitrago_ca_me_ilha.pdf: 4865572 bytes, checksum: e8593c9e425def26a441b4b919b9d371 (MD5)<br>Made available in DSpace on 2017-05-08T16:36:05Z (GMT). No. of bitstreams: 1 suarezbuitrago_ca_me_ilha.pdf: 4865572 bytes, checksum: e8593c9e425def26a441b4
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Suarez, Buitrago Camilo Alexey. "Sistema de carregamento rápido de veículo elétrico puro /." Ilha Solteira, 2017. http://hdl.handle.net/11449/150572.

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Orientador: Carlos Alberto Canesin<br>Resumo: Uma das principais dificuldades para a adoção dos veículos elétricos (VE) é o tempo de abastecimento (carregamento elétrico), considerado elevado quando comparado com o tempo requerido para abastecer um veículo com motor a combustão interna. O carregamento do VE típico de passageiros é geralmente realizado na residência do proprietário, ligando o carregador interno do VE em uma tomada convencional monofásica. Este método de carregamento é conhecido como de Corrente Alternada (CA), requer, tipicamente pelo menos 7 horas para fornecer uma carga compl
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Sartori, Hamiltom Confortin. "Uma nova metodologia de projeto para otimização do volume do converosr boost PFC." Universidade Federal de Santa Maria, 2009. http://repositorio.ufsm.br/handle/1/8466.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>This work investigates the influence of operation point (Δi @ fs) in the final volume of PFC boost converter. The boost inductor, EMI filter and thermal heatsink are the elements which main influences in the converter volume. These elements are strongly influenced by the chosen operation point, showing a direct relationship among them. With the increase of switch frequency and of the input current ripple occurs reduction of the boost inductor volume. On the other hand, it increases the switching losses in semiconductors, and infl
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26

Laouamri, Khaled. "Contribution à l'intégration des composants passifs d'une alimentation à découpage." Grenoble INPG, 2001. http://www.theses.fr/2001INPG0090.

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Les travaux présentés dans ce mémoire s'inscrivent dans une thématique nouvelle pour 1*équipe Electronique de Puissance du LEG : "l'intégration hybride des composants passifs". Us portent sur la conception de composants passifs et s'attardent sur leur modélisation, leur réalisation et leur caractensation. Ces composants seront employés au sein d'un convertisseur AC-DC à prélèvement sinusoïdal qui servira de support à notre étude. Il ressort d'une évaluation de quelques convertisseurs que la structure à résonance série se prête bien à l'intégration. Les effets des interactions électriques en ha
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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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Reymond, Cédric. "Conception d'une structure innovante de convertisseur AC-DC de type Totem-pole avec correction du facteur de puissance : application aux chargeurs de batteries des véhicules électriques." Thesis, Tours, 2019. http://www.theses.fr/2019TOUR4015.

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Les gouvernements responsabilisent les états sur l’environnement avec la mise en œuvre de solution pour décarboner la production de l’électricité. En 2020, 20 % de l’énergie produite sera générée par les énergies renouvelables. Cependant ces énergies vertes sont intermittentes et nécessitent une capacité de stockage importante pour la gestion locale des « smart grids ». Cette solution pose deux nouvelles problématiques : la nécessité d’un convertisseur bidirectionnel et la gestion des courants d’appel. Pour faciliter l’étude de ces problématiques, la thèse propose de lier au travers d’un bilan
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Barboza, Júnior José Ailton Leão. "Conversor CC-CA duplo boost com PFC e conexão série/paralelo na entrada para sistemas ininterruptos de energia." reponame:Repositório Institucional da UFC, 2012. http://www.repositorio.ufc.br/handle/riufc/15497.

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BARBOZA JÚNIOR, J. A. L. Conversor CC-CA duplo boost com PFC e conexão série/paralelo na entrada para sistemas ininterruptos de energia. 102 f. 2012. Dissertação (Mestrado em Engenharia Elétrica) - Centro de Tecnologia, Universidade Federal do Ceará, Fortaleza, 2012.<br>Submitted by Marlene Sousa (mmarlene@ufc.br) on 2016-03-11T13:04:57Z No. of bitstreams: 1 2012_dis_jslbarbozajunior.pdf: 1950427 bytes, checksum: 9fc1d70a6f2e6cac161cf9fccf9f408b (MD5)<br>Approved for entry into archive by Marlene Sousa(mmarlene@ufc.br) on 2016-03-16T13:24:15Z (GMT) No. of bitstreams: 1 2012_dis_jslbarbozajunio
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Lin, Cheng-Pin, and 林正斌. "Comparison Between Dual Phase Interleaved PFC Converter and ZCS PFC Converter." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/rnp27c.

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碩士<br>崑山科技大學<br>電子工程研究所<br>96<br>In This thesis, we study and implement a 300W BCM (Boundary Current Mode) dual-phase interleave PFC (Power Factor correction) circuit and a 300W active PFC circuit with ZCS (Zero Current Switching)。 At first, we describe the operation and topology difference between these circuits, then design and implement both of these practical PFC circuits for performance comparison. Finally, the results of comparisons are presented. According to comparisons of switching waveforms, power factors and other relative experiment results, the BCM interleaved PFC and ZCS PFC are
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31

Lin, Jia-Yi, and 林佳儀. "PFC Rectifiers Based Bridgeless Boost Converter." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/69808943006936706932.

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碩士<br>國立交通大學<br>機械工程系所<br>101<br>This paper presents the AC to DC Power Factor Correction converter with boost topology, using average current mode in fixed 200kHz switching frequency, and using microcontroller TMS320F28035 to control the PWM duty ratio in continuous conduction mode to re-shape the input current waveform and in phase with the input voltage. Typically, the PFC stage is a bridge rectifier followed by a boost circuit. However, the current distortion and power losses in the diode bridge cannot be ignored, so the conventional PFC topology is replaced by bridgeless PFC topology. Thi
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Tsai, Chien-Li, and 蔡建利. "A Passive PFC Converter with ZCS." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/229sfd.

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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>96<br>The PFC (Power Factor Correction) circuit is widely used in various power supplies so as to reduce the corresponding harmonic distortion and to increase power factor. Up to now, the environment protection and the energy saving are getting more and more attractive in the world. Consequently, improvement in the overall efficiency of the power supply is indispensable, and hence enhancement of the efficiency of the PFC circuit is an important research topic. Consequently, a passive ZCS (Zero Current Switching) PFC circuit topology is presented herein, which
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33

Wang, Chien-Hung, and 王健鴻. "Digital Control for Cuk PFC Converter." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/85361477657003231723.

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碩士<br>國立交通大學<br>電機學院電機與控制學程<br>104<br>This thesis presents Cuk converter and its digital control method to achieve the power factor correction (PFC) function. Compared to the common dual- loop-control method, this thesis focuses on the new control mode to meet IEC61000-3-2 harmonic standard. This context is adopted from Texas Instruments C2000 series TMS320F28335 , of which DSP chip is to be controlled by the entire circuit. This DSP is categorized into TMS320F28X series, which has floating-point capabilities. Compared to the fixed-point DSP, it has not only more accuracy arithmetic function
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HIEU, PHAM PHU, and PHAM PHU HIEU. "Digital Control Strategy for Boost PFC Converter." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/27729671064086308862.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>103<br>Power factor correction (PFC) shapes the input current to minimize the reactive power drawing from the mains. The use of PFC circuits is widely discussed and considered for most off-line power supplies. For high power applications, boost PFC converter operated in continuous conduction mode is usually employed and controlled by analog ICs such as UC3854. However, when the converter operates at lower power range, discontinuous conduction mode will appear during parts of line period, causing input current distortion. Moreover, the input EMI filter causes the sign
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LIN, LI-PEI, and 林立培. "Realization of an IB-HEPCS Bridgeless PFC Converter." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/9s7ygu.

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碩士<br>國立虎尾科技大學<br>電機工程系碩士班<br>106<br>Amidst the rapid development of electric vehicles today, battery charging system have been one of the main focuses of research and development. Wide application of most battery charging posts in the current market are limited due to size and installation difficulty. Almost all electric vehicles batteries are charged by converting alternating current to direct current, though the charging process is slow as the power efficiency of the vehicle’s on-board charger is restricted to the size, weight and heat dissipation limits of the converter’s power circuit. Th
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Kuo-Fan, Lin. "Design of the Improved Zero Current Switching PFC Converter." 2005. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0002-1706200511393600.

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Chen, Wei-Cheng, and 陳威成. "Current sensorless control for modified half-bridge PFC converter." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/60099960610576659240.

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碩士<br>國立交通大學<br>電機學院電機與控制學程<br>102<br>This thesis presents the improvement of half-bridge power factor corrector (PFC) converter. For the main power circuit, use modified half-bridge PFC converter to replace the traditional topology. The modified structure can improve the short through problem which caused by series switching components to enhance the circuit reliability. And also, it can reduce the switching power loss which caused by the body diodes’ reverse current recovery time. Especially, the double voltage output characteristic of half bridge structure will be useful for higher voltage
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Lin, Kuo-Fan, and 林國藩. "Design of the Improved Zero Current Switching PFC Converter." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/75176769361446257782.

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碩士<br>淡江大學<br>電機工程學系碩士班<br>93<br>In the PFC converter design must carefully deal with the hard switching losses due to the recovery current of boost diode. There are two approaches had proposed to solve the hard switching losses issue. One is passive soft switching method and the other is active soft switching method. Practically, the passive soft switching method has been used more widely in industry, because of it has simple, low cost, and reliable. Although, the passive soft switching method has more merits but it still exists some drawbacks that need to be improved. This thesis proposes th
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LIANG, CHI HO, and 梁期合. "Flyback PFC Converter with Low-Frequency Voltage Ripple Reduction." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/xgh9vy.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>102<br>This thesis studied two circuit topologies to reduce low-frequency output ripple voltage based on flyback power factor corrector (PFC). In the first topology, a reverse ripple voltage is produced by an Inverse-Buck convertor cascode at the output side to cancel the ripple. In the other topology, a bidirectional buck-boost converter is parallel-connected at the output to absorb/ supply power and thus reduce the ripple. Due to ripple reduction, small output capacitance can be used. Therefore, electrolytic capacitor is replaced by solid-state capacitor in the pro
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Chen, Yu-Zhi, and 沈育志. "Development of interleaved control for the PFC flyback converter." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/wk9e39.

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碩士<br>國立臺北科技大學<br>電力電子產業研發碩士專班<br>95<br>This paper presents two-phase flyback converter based on interleaved control, so as to upgrade the output power and to improve the power factor. Such interleaved control is realized via the proposed control rule. In this paper, the proposed control scheme for a 144W two-phase flyback converter, which has the rated input voltage of 110Vrms and the output voltage of 48V, is implemented by logic circuits. And, some simulation and experimental results are provided to demonstrate the effectiveness of the proposed control strategy.
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Nguyen, Thuc Duy, and Thuc Duy Nguyen. "Design and Implementation of an Interleaved Boost PFC Converter." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/9z2zxq.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>104<br>Power Factor Correction (PFC) converters are widely used in industry as off-line AC-DC power supplies. Its main task is shaping the input current to be in phase and in shape with input voltage to minimize the reactive power drawn from AC mains and reduce the presence of high-order current harmonics. In high-power applications, conventionally, boost PFC converter is always controlled by analog ICs such as UC3854 because of its cost-effectiveness and ease of implementation. However, with more stringent power quality norms required by international organizations,
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Chen, Hung-Jyun, and 陳竑鈞. "Design and Implementation of an Interleaved CRM Boost PFC Converter." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/35290261987064240076.

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碩士<br>國立臺灣大學<br>電機工程學研究所<br>101<br>Boost type power factor correction (PFC) converter operated in critical conduction mode (CRM) can achieve high power factor and soft switching features. In medium-to-high power level applications, multi-channel interleaved control method was commonly adopted to reduce input ripple current. Among various kinds of interleaved control methods, synchronized turn on voltage mode is easier to implement and each sub-circuit can operate with a fixed phase shift. However, if a perturbation happened to the control signal, the inductor current will fail to maintain crit
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Chen, Chien-Fu, and 陳建甫. "Current Sensorless Control for Dull-Boost Full-Bridge PFC Converter." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/91441909262626679231.

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碩士<br>國立交通大學<br>電機學院電機與控制學程<br>102<br>This thesis presents the improvement of Full-bridge power factor corrector (PFC) converter to implement the sensorless control method. The circuit topology is different from series switching components of tranditional Full-bridge converter. And there is not the shot-through problem. The freewheeling current flow through the independent diode instead of the body diodes of the switches, then the diodes can be designed otimally. In aspect of controlling method, the sensorless control only has two voltage loop which simplies the control structure and reduce th
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Zeng, Bo-Xiang, and 曾柏翔. "Study and Implement of a Totem-Pole Bridgeless PFC Converter." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/m4js6x.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>106<br>This thesis aims to study and design a power converter for high efficiency, high power density green energy system implementation. With output power 1000W, input AC voltage 90V to 264V, output DC voltage 400V. This thesis adopts totem pole bridgeless topology, using Gallium nitride High electron mobility transistor to replace Metal Oxide Semiconductor Field Effect Transistor(MOSFET), implements a high power, high-efficiency totem pole bridgeless power factor corrector. On the other hand, using the digital control to replace the analog control, the analog contr
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Hsiao, Li-yang, and 蕭立揚. "Single-Stage PFC Flyback Converter with Low Output Voltage Ripple." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/rk83qj.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>97<br>An auxiliary winding with an associated capacitor is added on the single-stage power factor corrector (PFC) based on fly-back conversion to reduce the ripple on the dc output voltage. The associated capacitor takes out partial energy at every switching cycle from the fly-back conversion and releases the stored energy to the load at the valley of the rectified line voltage. The negative effect of such an approach is that the converter does not draw a current from the AC line at the lower voltage near zero crossing, leading to deterioration in the power factor.
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Yeh, Shu-Wei, and 葉書瑋. "Implementation of an LLC Resonant Converter with PFC using Single DSP." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/7m3758.

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碩士<br>國立臺北科技大學<br>電力電子產業研發碩士專班<br>102<br>Conventional LLC resonant converter has always been a PFC front-end AC-DC converter and an LLC DC-DC converter connected in series. This thesis implements an LLC resonant converter with PFC front-end using single digital signal processor (DSP). Complementary drive signals of the fixed 50% duty are generated by a DSP to drive the power transistor (MOSFET) on half-bridge circuit of LLC resonant converter. Hence, this will let the transformer’s primary side magnetizing inductance, leakage inductance, and resonant capacitor resonate and dynamically adjust
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Rivera, Martin, and 馬瑞陽. "A study on GaN HEMT–based Totem-Pole Bridgeless PFC Converter." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/7s9mvp.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>104<br>The Totem-Pole bridgeless Power Factor Correction (PFC) converter inherits the MOSFET built in body diode reverse-recovery current (Irr) at Continuous Conduction Mode (CCM). The Irr issues limit the Totem Pole PFC to be adapted in the newest technological devices due to switching losses and low efficiency. The introduction of the first 600V transistor in a TO-247 package by Transphorm, shaped the Totem-Pole PFC in CCM operation attaining greater system benefits in power conversion application. This thesis will provide an insight approach by implementing the
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48

Wu, Chien-Hua, and 吳建樺. "Isolated Two-Stage AC-DC Converter with PFC and Multiple Outputs." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/ppjfgg.

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碩士<br>國立臺北科技大學<br>電力電子產業研發碩士專班<br>96<br>The purpose of the thesis focuses on developing the power supply to feed the laboratory power amplifier. Such a power supply contains one boost converter with power factor correction (PFC), one multi-output flyback converter with two output voltages feeding the power amplifier and with additional two output voltages feeding the peripheral circuit of this power supply. Regarding the control methods used herein, the boost converter is controlled by L6561 whereas the flyback converter is controlled by UC3845. In this paper, the mathematical derivation is fi
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Liou, Jia-da, and 劉佳達. "A Digital Quasi-Resonant Flyback PFC Converter with Primary-Side Control." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/51459848922533621487.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>103<br>This thesis proposes a primary-side digitally controlled quasi-resonant flyback power factor correction converter. Firstly, the sensing and control units are equipped on primary side and no secondary side feedback compensation components are required.Therefore, the opto-coupler isolators are omitted and the system reliability can be enhanced, and the cost is reduced. The primary side current is detected and mapped to the secondary side to achieve constant current control. The proposed circuit operates at discontinuous conduction mode or boundary conduction mo
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Chen, Wei-Lun, and 陳偉倫. "Triangular Current Mode Totem-Pole Bridgeless PFC Converter without ZCD circuit." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/qgwrhg.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>107<br>This thesis presents a triangular current mode totem-pole PFC rectifier with variable frequency. It can achievd ZVS over the full input voltage range. This thesis proposes a triangular current-mode control without an external zero current detection circuit. In this thesis, average current-mode control is used to achived high power factor. The period of the duty cycle is calculated using the average current reference, input voltage, and output voltage. PSIM simulation is utilized to verify the feasibility of the proposed control method. Finally, the 800-W bridg
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