Design and implementation of a GaN based dual active bridge converter for electric vehicle charger-CANDIDATE: Marco Giacomazzo-INDUSTRIAL ENGINEERING DEPARTMENT Master’s degree in Electrical Energy Engineering-University of Padua

 

Industrial Engineering Department Master’s degree in Electrical Energy Engineering

Master's thesis in Electrical Energy Engineering 

SUPERVISOR: Prof. Manuele Bertoluzzo 

CO-SUPERVISOR: M.Sc. Konstantin Siebke 

CANDIDATE: Marco Giacomazzo

 ACADEMIC YEAR 2019-2020

 Design and implementation of a GaN based dual active bridge converter for electric vehicle charger 

 Abstract

 In questa tesi si affronta lo studio del convertitore doppio ponte attivo, operante alla frequenza di 500 [kHz]; viene inoltre presentata la progettazione del trasformatore ad alta frequenza ed infine viene descritta una possibile alternativa al classico controllo con singolo sfasamento tra i due ponti attivi, al fine di estendere il funzionamento in soft switching anche con piccoli livelli di potenza trasmessa, in particolare durante l'ultimo stadio di carica della batteria.

LINK:http://www.mediafire.com/file/alauj0ohf9v15wl/Giacomazzo_Marco_1159867.pdf/file

A Study on the Efficiency Improvement of Inverter for Automotive using SiC MOSFET SiC MOSFET를 이용한 차량용 INVERTER 효율 향상에 관한 연구--KOREA NATIONAL UNIVERSITY OF TRANSPORTATION

 A Study on the Efficiency Improvement of Inverter for Automotive using SiC MOSFET

 SiC MOSFET를 이용한 차량용 INVERTER 효율 향상에 관한 연구 

Author

Seongki Ahn

KOREA NATIONAL UNIVERSITY OF TRANSPORTATION

Abstract 

DC-AC inverter units for vehicles are supplied with input voltage DC 12V to 24V using vehicle batteries and converted to single phase AC 220V. Automotive DC-AC inverters have been used in some places with generators where electricity cannot be drawn up, such as election campaign vehicles, but they are increasingly turning into inverters due to engine noise and smoke problems in generators. In particular, the need to use AC power in camping vehicles and food trucks increased due to the influence of the five-day workweek, and the increasing use of non-starting air conditioners in large vehicles such as trailers. In addition, with the increasing use of personal electrical appliances such as laptops and mobile phones, the demand for DC-AC inverters for vehicles is expected to surge in the coming months in multi-use transportation means such as buses and railway vehicles. MOSFET, which is a power semiconductor device, is a major component that is needed for DC-AC inverters for vehicles. Although silicon (Si : Silicon) power semiconductor device has been used as a key power conversion component of inverter system until now, achieving fast/lightening and high power generation of power unit that consists of silicon element is reaching its limit. Silicon carbide (SiC : Silicon Carbide) power semiconductor is the next generation power semiconductor to replace the limit situation that Si power semiconductor has. In this paper, we measured the loss of conduction, switching loss, efficiency characteristics, and the temperature of the main parts for Si / SiC MOSFET. In the conduction loss experiment, the loss value of SiC MOSFET compared to Si MOSFET for one cycle is approximately 61.3(%). The switching loss experiment showed that SiC MOSFET losses were small, with about 49.6(%) at Turn-on and approximately 49.2(%) at Turn-off against Si MOSFET. This was immediately confirmed to be low temperature in each part of the inverter. In particular, it was found that the temperature difference at the transformer core with the highest temperature varies from the load of 600(W) to 15.1(°C). In the experiment of efficiency characteristics, the maximum efficiency of 93.5(%) was obtained, and the efficiency improvement of up to 2.8(%) compared to the inverter with Si MOSFET was achieved. The temperature measurement test also shows that most parts temperature is low in the inverter employing SiC MOSFET. The application of SiC MOSFET to the efficiency of inverter was proved to be reasonable as the performance of inverter with SiC

In this paper, we measured the loss of conduction, switching loss, efficiency characteristics, and the temperature of the main parts for Si / SiC MOSFET. In the conduction loss experiment, the loss value of SiC MOSFET compared to Si MOSFET for one cycle is approximately 61.3(%). The switching loss experiment showed that SiC MOSFET losses were small, with about 49.6(%) at Turn-on and approximately 49.2(%) at Turn-off against Si MOSFET. This was immediately confirmed to be low temperature in each part of the inverter. In particular, it was found that the temperature difference at the transformer core with the highest temperature varies from the load of 600(W) to 15.1(°C). In the experiment of efficiency characteristics, the maximum efficiency of 93.5(%) was obtained, and the efficiency improvement of up to 2.8(%) compared to the inverter with Si MOSFET was achieved. The temperature measurement test also shows that most parts temperature is low in the inverter employing SiC MOSFET. The application of SiC MOSFET to the efficiency of inverter was proved to be reasonable as the performance of inverter with SiC

LINK: http://www.mediafire.com/file/w41aw238oiejlv4/A+Study+on+the+Efficiency+Improvement+of+Inverter+for+Automotive+using+SiC+MOSFET.pdf/file

공동주택에 적용한 계통연계형 태양광발전시스템의 보호방식에 관한 연구 A Study on the Protection Method of the Grid-Connected Photovoltaic Power Generation System Applied to Apartments-GeunYub Lee- Dept. of Electrical Eng. The Graduate School Korea University

 

공동주택에 적용한 계통연계형 태양광발전시스템의 보호방식에 관한 연구

 A Study on the Protection Method of the Grid-Connected Photovoltaic Power Generation System Applied to Apartments

 高麗大學敎工學大學院 電氣工學科 李根燁 2011年 

 A Study on the Protection Method of the Grid-Connected Photovoltaic Power Generation System Applied to Apartments 

BY GeunYub Lee 

Dept. of Electrical Eng. The Graduate School Korea University 

(Supervised by Prof. Gilsoo Jang, Ph.D)

 Abstract 

Global environment problems have emerged rapidly throughout international society since the 1990s. Diverse global environment problems are being raised including global warming, ozone depletion, waste contamination, acid rain, desertification, marine pollution, extinction of species, and radioactive contamination. The root cause of these phenomena is energy consumption. Moreover, around a fourth of the total energy consumption is consumed by buildings. In Korea, buildings consume around 25% of the total energy consumption, and residential buildings consume around 75% of energy consumed by buildings and energy consumption by residential buildings is expected to keep growing along with the rise of economic level. Taking this issue seriously, the Korean government has been supporting investments in research and facilities for energy saving and alternative energy technologies since the 1980s as an effort to secure future energy sources, to solve global environment problems, and to attain sustainable economic growth. Recently, facilities using new and renewable energies are being spread and expanded and people are recognizing particularly the importance of technologies for photovoltaic power generation as an infinite energy source. Considering the current situation of Korea highly dependent on fossil energy, the application of photovoltaic power generation to apartment buildings is desirable not only for the growth of national economy and the stable security of alternative energy resources but also for the conservation of global environment. Nevertheless, there have not been many studies for developing technologies to connect photovoltaic systems to electric companies. It is urgently required to increase stable electric power supply of enhanced reliability and to develop system connection technologies. The installation of photovoltaic systems is steadily increasing as evidenced by the onemillion green home construction project under the government’s active support. If photovoltaic facilities are installed on the slanting roofs of apartment buildings and connected to existing distribution systems, they may have an adverse effect on quality, stability and reliability of electric power and, most of all, may disrupt the protective coordination of systems. The connection of photovoltaic systems to distribution systems means a new change in the conventional concept of electric power system. Thus, this study aimed to analyze the quality of electric power required and expected problems when photovoltaic facilities are connected to distribution systems, to look for solutions for the problems, and ultimately to enhance the performance, stability and reliability of photovoltaic systems and establish technological conditions to be satisfied for connection to distribution systems. First, this study examined how to prevent islanding detection caused by power failure in existing distribution systems during the connected operation of photovoltaic facilities and existing distribution systems and to minimize the loss of human life and properties caused by such accidents. Second, this study analyzed the capacity of photovoltaic facilities connectable to low‐voltage distribution systems based on voltage regulation as a part of research on the capacity of photovoltaic systems connected to existing distribution systems. Third, with regard to the ground system of photovoltaic facilities, this study demonstrated the need of a new evaluation method suitable for DC systems apart from existing AC ones. There will be unexpected problems raised along with the spread of system‐connected photovoltaic facilities. Thus we expect active research to find solutions for problems resulting from connection between photovoltaic facilities and distribution systems and to hasten the stable supply of electric power to consumers through photovoltaic facilities using solar energy.

LINK: http://www.mediafire.com/file/k91e2oag6epy4g7/A+Study+on+the+Protection+Method+of+the+Grid-Connected+Photovoltaic+Power+Generation+System+Applied+to+Apartments.pdf/file

MANUAL DE ENGENHARIA PARA SISTEMAS FOTOVOLTAICOS-JOÃO TAVARES PINTO-MARCO ANTONIO GALDINO-GRUPO DE TRABALHO DE ENERGIA SOLAR-GTES-CEPEL-DTE-CRESESB

 
MANUAL DE ENGENHARIA PARA SISTEMAS FOTOVOLTAICOS-JOÃO TAVARES PINTO-MARCO ANTONIO GALDINO-GRUPO DE TRABALHO DE ENERGIA SOLAR-GTES-CEPEL-DTE-CRESESB

LINK: http://www.mediafire.com/file/nd09taqdktrb39r/Manual_de_Engenharia_FV_2014.pdf/file

Control Architecture for Parallel Inverter in Uninterruptible Power Systems Chi Zhang, Student Member, IEEE, Josep M. Guerrero, Fellow, IEEE, Juan C. Vasquez, Senior Member, IEEE, Ernane A.A. Coelho, Member, IEEE

 

Abstract— In this paper, a control strategy for the parallel operation of three-phase inverters forming an online uninterruptible power system (UPS) is presented. The UPS system consists of a cluster of paralleled inverters with LC filters directly connected to an AC critical bus and an AC/DC forming a DC bus. The proposed control scheme comprises two layers: (i) a local layer that contains a “reactive power-to-phase droop” in order to synchronize the phase angle of each inverter and a virtual resistance loop that guarantees equal power sharing among inverters; and (ii) a central controller that guarantees synchronization with an external real/fictitious utility, and critical bus voltage amplitude restoration. Improved transient and steady-state frequency, active, reactive and harmonic power sharing, and global phase-locked loop resynchronization capability are achieved. Detailed system topology and control architecture are presented in this paper. Further, a mathematical model was derived in order to analyze critical parameters effects on system stability. The proposed control approach has been validated by means of experimental results obtained for several case-study scenarios. Index Terms— UPS system; parallel inverters; voltage restoration; droop control; virtual impedance

LINK:https://vbn.aau.dk/files/219215517/Zhang_Chi_trans_manu_doublecol.pdf

Updating and Customizing an industrial UPS HMI-A Master's Thesis Submitted to the Faculty of the Escola Tècnica d'Enginyeria de Telecomunicació de Barcelona Universitat Politècnica de Catalunya by Ali Ahmadi

 Abstract 

Uninterruptable Power Supply or UPS is one of the key parts of industries nowadays. Importance of it has risen because of the increasing demand for more stable power supply for Electronics and Electrical systems each year, especially in the field of IT and Data Servers. During these years, with improving Electrical products, Human Machine Interface became part of most electrical products and UPS is no exception. These days, UPS has a graphical display which according to the application of UPS, its design and abilities is different. HMI design for UPS has challenges, as instance: design according to the application, efficiency of design, preventing bugs, graphical design and etc. During this project, our plan is designing a new generation of Salicru HMI with the capability of adopting with old version Industrial UPS which manufactured by partner companies and also this HMI use for Salicru new generation UPS, Cube 4.

LINK: https://upcommons.upc.edu/bitstream/handle/2117/165610/TFM_Ali Ahmadi-Final Version.pdf

Optimal Design Method of the LLC resonant converter using the hybrid current balancing circuit for LED lighting -Author Jin-Gu Kim Department of Electrical & Medical Convergent Engineering Graduate School, Kangwon National University South Korea.

 

Optimal Design Method of the LLC resonant converter using the hybrid current balancing circuit for LED lighting  Author Jin-Gu Kim

 Department of Electrical & Medical Convergent Engineering Graduate School, Kangwon National University South Korea.

Abstract 

In this thesis, a novel hybrid current balancing circuit and an optimum design of LLC resonant converter for driving a current balancing circuit are proposed. 

First of all, the hybrid current balancing circuit was proposed for compensating current deviation among LED strings. LEDs have been widely used in lighting, automobiles, and airplanes owing to their excellent light output characteristics and long lifespan. Though LEDs are manufactured under the same process, variations in impurity concentrations cause electrical deviation among LEDs. This electrical deviation results in current unbalance of LED strings. The resulting current unbalance does not only reduce the life time of the LED but also cause non-uniform luminance of LEDs connected in parallel. The LED driving circuit is researched to solve the above problems. In this thesis, a novel hybrid current balancing circuit with a Y-type current balancing transformer and a voltage doubler rectifier circuit was proposed for the compensation of 6 LED strings with a simple structure.

 Secondly, the Optimal design method of LLC resonant converter for driving hybrid current balancing circuit was proposed. The difference between the proposed optimal design method of LLC resonant converter and conventional design method can be divided into three categories.

 First of all, when designing transformer with leakage inductance(Lr ) and magnetizing inductance(Lm), unwanted leakage inductance of secondary side (Lr2) which cause error in the process of measuring the leakage inductance (Lr ) with instrument occurs. This design error could be reduced by taking into account the leakage inductance of secondary side(Lr2). 

Secondly, in general, the voltage gain characteristic curve is applied to design LLC resonant converter. in this thesis, the current gain characteristic curve was applied to the design process which is suitable for LED that is non-linear load and necessary to be controlled to a constant current. 

Lastly, the equivalent circuit of LED was applied to the design process. Normally, a resistive load which has linear load characteristic is used for designing the LLC resonant converter. However, in this thesis, the equivalent circuit of LED which includes a voltage source, a resistor and a diode could be obtained by using the linear approximation method. This circuit was then applied to the design process for reducing design error. 

Experimental results are presented to verify the performance of the proposed hybrid current balancing circuit and the optimal design method of the LLC resonant converter. The LED maximum current error rate which was 19.57% was reduced to 4.5% by Y-type current balancing transformer. Also, the validity of the proposed optimal design method of the LLC resonant converter was verified by comparing it with the conventional design method. An 150W prototype was implemented and used for the performance verification of the hybrid current balancing circuit and the LLC resonant converter.

LINK: http://www.mediafire.com/file/sfzdhsuo3y91zod/file

Master's Thesis Design, Control, and Implementation of High Frequency LLC Resonant Converter-Author- Hwa-Pyeong Park Department of Electrical and Computer Engineering -ULSANG NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY

 Master's Thesis

 Design, Control, and Implementation of High Frequency LLC Resonant Converter Hwa-Pyeong Park Department of Electrical and Computer Engineering 

 Abstract

 A high switching frequency operation has been introduced with much interest in research and industrial areas to improve the power density of power converters. However, its implementation is difficult for an elaborate switch mode power supply which has high efficiency and stable operation. In this paper, a power stage and a feedback controller design will be considered for proper operation, stability, and high power conversion efficiency of the high frequency LLC resonant converter. The power density can be improved by adopting high switching frequency which allows small sized passive components. At the high switching frequency, the size reduction of the passive components such as transformer, and output capacitor will be estimated to obtain the high power density design. In addition, the design method of the magnetizing inductance design method will be derived to achieve the zero voltage switching (ZVS) at the high switching frequency operation. In aspect of frequency domain, the smaller output capacitor which has small capacitance and low effective series resistance (ESR) changes the small-signal behavior of the converter’s power stage. It can make the converter unstable by increasing the crossover frequency in the loop gain of the smallsignal model. The effect of the smaller output capacitance should be analyzed for stability analysis using a proper small-signal model of the LLC resonant converter. Therefore, the proper design methods of the feedback compensator are derived to obtain sufficient phase margin in the bode plot of the converter’s loop gain for its stable operation. The design considerations of the power stage and the feedback loop will be verified with the performance comparison of 100 kHz and 500 kHz switching frequency LLC resonant converters. Since the switching performance of state-of-art power switches has been improved, the power converter can operate over a 1 MHz switching frequency. In this paper, GaN E-HEMTs are used to achieve the high switching frequency operation due to its small channel resistance and small output capacitance. However, the GaN E-HEMTs also have different switching operation characteristics to other conventional silicon-based MOSFETs. Therefore, the high speed switching characteristics of the GaN E-HEMT should be analyzed to obtain proper operation for a half-bridge type LLC resonant converter using a boostrap gate drive circuit. Moreover, a soft start algorithm for the high switching frequency is analyzed to suppress inrush currents at the cold start operation of the converter. All the design considerations using the GaN E-HEMT are verified with a 240 W prototype LLC resonant converter operating at 1 MHz switching frequency.

LINK:http://www.riss.kr/search/detail/DetailView.do?p_mat_type=be54d9b8bc7cdb09&control_no=eee4031de5dfc95effe0bdc3ef48d419

LINK: https://www.mediafire.com/file/48ryayn4gvu1ckz/file

Méthodologie de conception numérique d’un module de puissance dédié à l’automobile en vue de l’optimisation des surtensions, des pertes et des émissions conduites Hocine Dao--Thèse de doctorat de l'Université Paris-Saclay préparée à L’École Normale Supérieure de Cachan (École normale supérieure Paris-Saclay)-

 

Méthodologie de conception numérique d’un module de puissance dédié à l’automobile en vue de l’optimisation des surtensions, des pertes et des émissions conduites 

Hocine Dao

Thèse de doctorat de l'Université Paris-Saclay préparée à L’École Normale Supérieure de Cachan (École normale supérieure Paris-Saclay)

 Résumé : 

Le véhicule électrique (VE) s'inscrit actuellement dans un contexte industriel fortement corrélé aux contraintes environnementales. Un tel contexte où la minimisation des coûts est également vitale impose par conséquent des contraintes de développement et de réalisation. Les modules de puissance constituent un coût conséquent dans un système de conversion pour l'automobile. Nous nous plaçons dans le contexte des modules de puissance à IGBT en technologie silicium qui assurent les fonctions de conversion d’énergie (AC/DC ou DC/AC) pour des applications moyennes et fortes puissances. L’un des points les plus limitant de ces modules est l’aspect inductif de la maille de commutation. L’intégration de condensateurs de découplage (Ceq) au sein du module permet de réduire les effets des inductances parasites car ils offrent un chemin à basse impédance au courant commuté et augmentent la vitesse de commutation du composant. C’est cette solution que nous avons étudiée. Le but est de démontrer la faisabilité d’une telle solution couplée avec le choix optimal de la résistance de grille (Rg) des puces IGBT. Nous avons établi des règles de conception permettant la construction de modèles circuit d’un bras d’onduleur permettant l’intégration de fonction de découplage. Ce dernier nous a permis dans un premier temps de réduire les surtensions aux bornes des composants mais les pertes par commutation n’ont pas pu être améliorées significativement en comparaison à un module conventionnel. La démarche suivie pour aller plus loin a consisté à chercher un compromis entre les valeurs des condensateurs distribués dans le module et le choix des résistances de grille des puces IGBT. L’optimisation par algorithmes génétiques est la solution qui a été trouvée pour contourner les problèmes bloquants et améliorer significativement les performances du module.

LINK: https://tel.archives-ouvertes.fr/tel-01769661

LINK DIRETO: https://tel.archives-ouvertes.fr/tel-01769661/document

Vieillissement accéléré de modules de puissance de type MOSFET SiC et IGBT Si basé sur l'analyse de profils de mission d'onduleurs photovoltaïques. Mouhannad Dbeiss--Institut Polytechnique de Grenoble

Vieillissement accéléré de modules de puissance de type MOSFET SiC et IGBT Si basé sur l'analyse de profils de mission d'onduleurs photovoltaïques

Autor: Mouhannad Dbeiss 

 Thèse dirigée par Yvan AVENAS, Maître de Conférences HdR, Institut Polytechnique de Grenoble préparée au sein du CEA/INES dans l'École Doctorale Electronique, Electrotechnique, Automatique, Traitement du Signal (EEATS)

Abstract

In the case of photovoltaic installations, the DC/AC inverter has the highest failure rate, and the anticipation of its breakdowns is still difficult, while few studies have been done on the reliability of this type of inverter. The aim of this PhD is to propose tools and methods to study the ageing of power modules in this type of application, by focusing on ageing phenomena related to thermo-mechanical aspects.

As a general rule, the accelerated ageing of power modules is carried out under aggravated conditions of current (Active Cycling) or temperature (Passive Cycling) in order to accelerate the ageing process. Unfortunately, when applying this type of accelerated ageing tests, some failure mechanisms that do not occur in the real application could be observed, while inversely, other mechanisms that usually occur could not be recreated.

The first part of the PhD focuses on the implementation of an accelerated ageing method of the semiconductor devices inside photovoltaic inverters. This is accomplished by analyzing the mission profiles of the inverter’s output current and ambient temperature, extracted over several years from photovoltaic power plants located in the south of France. These profiles are used to study photovoltaic current dynamics, and are introduced into numerical models to estimate losses and junction temperature variations of semiconductors used in inverters, using the cycle counting algorithm “Rainflow”.

This method is then performed in two experimental test benches. In the first one, the devices under test are IGBT modules, where the accelerated ageing profile designed is implemented using the opposition method. Moreover, an in-situ setup for monitoring ageing indicators (thermal impedance and dynamic resistance) is also proposed and evaluated. The second bench is devoted to study the ageing of SiC MOSFET power modules. The accelerated ageing test is carried out under the same conditions as for the IGBT modules with more monitored electrical indicators, but this time by disconnecting the semiconductor devices from the inverter. The results obtained allowed to determine several potential ageing indicators of IGBTs and SiC MOSFETs used in a photovoltaic inverter.

LINK: https://www.mediafire.com/file/0i3rclq4igkzl93/file

Elaboration sans prototypage du circuit équivalent de transformateurs de type planar-Présentée et soutenue publiquement par Xavier MARGUERON-THESE Pour obtenir le grade de DOCTEUR DE L’UNIVERSITE JOSEPH FOURIER

THESE Pour obtenir le grade de DOCTEUR DE L’UNIVERSITE JOSEPH FOURIER Spécialité : « Génie Electrique » Préparée au Laboratoire d'Electrotechnique de Grenoble Dans le cadre de l’Ecole Doctorale « Electronique, Electrotechnique, Automatique, Télécommunication, Signal »

 Présentée et soutenue publiquement par Xavier MARGUERON Le 23 octobre 2006 

Elaboration sans prototypage du circuit équivalent de transformateurs de type planar

 INTRODUCTION GENERALE 

 Le développement de l'électronique de puissance a connu, depuis une vingtaine d'année, un essor remarquable. Des convertisseurs de plus en plus performants et de plus en plus petits sont présents dans la plupart des dispositifs utilisés quotidiennement : téléphone portable, ordinateurs… Hormis le coût, les deux préoccupations prioritaires des développeurs sont l'encombrement et le rendement. Les redresseurs, hacheurs et autres alimentations à découpage ont donc subi des évolutions importantes tant au niveau de leur structure que de leurs composants actifs et passifs. La miniaturisation des alimentations a, en grande partie, été facilitée par l'élévation des fréquences de découpage, ce qui n'est pas sans induire un certain nombre de contraintes au niveau des composants. En effet, pour une puissance équivalente, une diminution de taille nécessite souvent un changement de technologie et de nouveaux problèmes apparaissent. Plus un composant est petit, plus le rendement est essentiel puisque les calories sont plus difficiles à évacuer d'un petit composant. Au coeur des convertisseurs, les transformateurs sont un élément essentiel qui permet le transfert de l'énergie, l'adaptation des niveaux de tension et de courant et l'isolation galvanique de deux parties d'une alimentation. Leur rendement doit être élevé afin de transférer l'énergie sans pénaliser le rendement global. Dans une optique de réduction de dimensions, les composants bobinés, "classiques", se retrouvent limités puisque ces derniers sont bobinés avec du fil de cuivre (émaillé ou de technologie Litz), dont on ne peut diminuer la section. Pour surmonter ce problème, les composants planars ont été introduits.

LINK: http://l2ep.univ-lille1.fr/fileupload/file/theses/THESE_X-Margueron.pdf

CARREGADOR DE BATERIAS MONOFÁSICO PARA APLICAÇÃO EM VEÍCULOS ELÉTRICOS -Autor César Orellana Lafuente - CENTRO DE TECNOLOGIA PÓS-GRADUAÇÃO EM ENGENHARIA ELÉTRICA UNIVERSIDADE FEDERAL DE CEARÁ

CARREGADOR DE BATERIAS MONOFÁSICO PARA APLICAÇÃO EM VEÍCULOS ELÉTRICOS

César Orellana Lafuente Fortaleza Julho de 2011 

Dissertação submetida à Universidade Federal do Ceará como parte dos requisitos para obtenção do grau de Mestre em Engenharia Elétrica.

 Orientador: Prof. Dr. René Pastor Torrico Bascopé 

 Co-orientador: Prof. Dr. Demercil de Souza Oliveira Jr.

 RESUMO 

Orellana-Lafuente, C., “Carregador de Baterias Monofásico Para Aplicação em Veículos Elétricos”, Universidade Federal do Ceará - UFC, 2011, 154p.

 Este trabalho apresenta o estudo de um carregador de baterias monofásico aplicado a veículos elétricos. Este carregador é composto por dois estágios de processamento de energia e um circuito digital de supervisão para controlar a tensão sobre o banco de baterias e a corrente de recarga das mesmas. O primeiro estágio consiste de um conversor CA-CC bridgeless com característica de alto fator de potência, e o segundo estágio é representado por um conversor CC-CC fullbridge com isolamento em alta frequência e comutação sob tensão nula (Zero Voltage Switching – ZVS). Para ambos os conversores, foi realizada uma análise qualitativa e quantitativa, bem como apresentados exemplos de projeto para facilitar o dimensionamento dos componentes. Finalmente, com os componentes escolhidos, foi montado um protótipo que permite carregar de uma até oito baterias de 12 V conectadas em série. O sistema apresenta como especificações: tensão de entrada alternada de 220 V±15%; tensão de saída contínua de 120 V; corrente de saída contínua de 20 A; e potência média de saída de 2,4 kW. Palavras- chave: Veículos Elétricos. Carregador de Baterias. Conversor Bridgeless. Correção de Fator de Potencia. Conversor FB-ZVS-PS. Comutação sob Tensão Nula.

LINK: http://www.gpec.ufc.br/trabalhos/CARREGADOR DE BATERIAS.pdf