Дисертації з теми "Power electronic converters for drives"
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Lund, Richard. "Multilevel Power Electronic Converters for Electrical motor Drives." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-687.
Повний текст джерелаPower electronic converters are widely used in industrial power conversion systems both for utility and drives applications. As the power level increases, the voltage level is increased accordingly to obtain satisfactory efficiency. During the last years, the voltage rating of fast switching high voltage semiconductors such as the Insulated Gate Bipolar Transistor (IGBT) has increased. Still, there is a need for series connection of switching devices. In this area of applications, the Multilevel Converter has shown growing popularity.
The fundamental advantages of the Multilevel Converter topologies are low distorted output waveforms and limited voltage stress on the switching devices. The main disadvantages are higher complexity and more difficult control.
In this thesis, Multilevel Converters are analysed for large motor drive applications. The main focus has been on converter losses, output waveform quality and control.
Analytical expressions for both switching and conduction losses for 4- and 5-level Diode Clamped Converters have been developed. The investigation shows that the losses can be reduced by utilizing a multilevel topology for a 1 MW drive. This work is presented in [46]. The same reduction in losses is proven for a 2300V/ 3 MW drive.
Analytical expressions for the harmonic losses in 3-level converters have been developed for 2 different Carrier Based PWM schemes, presented in [56], [57] and [58]. Also Space Vector PWM are investigated and compared by simulations, in addition to 4- and 5-level Carrier Based PWM.
DC-bus balancing in both 3- and 5-level converters is discussed. Balancing in 3- level converters can be achieved by proper control. Balancing in 5-level converters can be achieved by proper arrangement of isolated DC-supplies.
One 40kW 3-level converter and one 5kW 5-level converter has been designed and built. Experimental verification of the analytical and simulated results is shown.
Pickert, Volker. "Assessment of novel power electronic converters for drives applications." Thesis, University of Newcastle Upon Tyne, 1999. http://hdl.handle.net/10443/498.
Повний текст джерелаFrancis, Gerald. "A Synchronous Distributed Digital Control Architecture for High Power Converters." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/31942.
Повний текст джерела
This thesis proposes a synchronous digital control architecture that allows for the communication and control of devices via a fiber optic communication ring using digital technology. The proposed control architecture is a multidisciplinary approach consisting of concepts from several areas of electrical engineering. A review of the state of the art is presented in Chapter 2 in the areas of power electronics, fieldbus control networks, and digital design. A universal controller is proposed as a solution to the hardware independent control of these converters. Chapter 3 discusses how the controller was specified, designed, implemented, and tested. The power level specific hardware is implemented in modules referred to as hardware managers. A design for a hardware manager was previously implemented and tested. Based on these results and experiences, an improved hardware manager is specified in Chapter 4. A fault tolerant communication protocol is specified in Chapter 5. This protocol is an improvement on a previous version of the protocol, adding benefits of improved synchronization, multimaster support, fault tolerant structure with support for hot-swapping, live insertion and removals, a variable ring structure, and a new network based clock concept for greater flexibility and control. Chapter 6 provides a system demonstration, verifying the components work in configurations involving combinations of controllers and hardware managers to form applications. Chapter 7 is the conclusion. VHDL code is included for the controller, the hardware manager, and the protocol. Schematics and manufacturing specifications are included for the controller.
Master of Science
Anthony, Philip Henry. "A study of resonant gate drivers and their application in high efficiency power electronic converters." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618548.
Повний текст джерелаFalck, Johannes [Verfasser], Marco [Akademischer Betreuer] Liserre, Jörg [Gutachter] Roth-Stielow, and Thomas [Gutachter] Meurer. "Thermal Stress Based Model Predictive Control of Power Electronic Converters in Electric Drives Applications / Johannes Falck ; Gutachter: Jörg Roth-Stielow, Thomas Meurer ; Betreuer: Marco Liserre." Kiel : Universitätsbibliothek Kiel, 2021. http://d-nb.info/1232726362/34.
Повний текст джерелаJalili, Kamran. "Investigation of Control Concepts for High-Speed Induction Machine Drives and Grid Side Pulse-Width Modulation Voltage Source Converters." Doctoral thesis, Technische Universität Dresden, 2008. https://tud.qucosa.de/id/qucosa%3A25053.
Повний текст джерелаJalili, Kamran. "Investigation of control concepts for high speed induction machine drives and grid side pulse width modulation voltage source converters." Doctoral thesis, Berlin mbv, 2009. http://d-nb.info/995880107/04.
Повний текст джерелаMontasser, Yuseph. "Design and Development of a Power Modulator for Insulation Testing." Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/2895.
Повний текст джерелаNarayanan, G. "Synchronised Pulsewidth Modulation Strategies Based On Space Vector Approach For Induction Motor Drives." Thesis, Indian Institute of Science, 1999. http://hdl.handle.net/2005/139.
Повний текст джерелаBonavoglia, Marco <1987>. "Power Converters and Electric Drives for Smart Grid Applications." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6778/1/Bonavoglia_Marco_tesi.pdf.
Повний текст джерелаBonavoglia, Marco <1987>. "Power Converters and Electric Drives for Smart Grid Applications." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6778/.
Повний текст джерелаGiussani, Riccardo. "PD monitoring of power electronic converters." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/pd-monitoring-of-power-electronic-converters(eea30376-4752-416c-a046-2773a21064c4).html.
Повний текст джерелаBishnoi, Hemant. "Behavioral EMI-Models of Switched Power Converters." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23936.
Повний текст джерелаPh. D.
Rojas, Dueñas Gabriel. "Modeling and identification of power electronic converters." Doctoral thesis, Universitat Politècnica de Catalunya, 2022. http://hdl.handle.net/10803/673581.
Повний текст джерелаEn la actualidad, el uso de sistemas y componentes eléctricos complejos se extiende a múltiples sectores industriales. Esto se hace con el propósito de mejorar su eficiencia y, en consecuencia, ser más sostenibles y amigables con el medio ambiente. Por tanto, el desarrollo de sistemas electrónicos de potencia es uno de los puntos más importantes de esta transición. Muchos fabricantes han mejorado sus equipos y procesos para satisfacer las nuevas necesidades de las industrias (aeronáutica, automotriz, aeroespacial, telecomunicaciones, etc.). Para el caso particular de los aviones más eléctricos (MEA, por sus siglas en inglés), existen varios convertidores de potencia, inversores y filtros que suelen adquirirse a diferentes fabricantes. Se trata de convertidores de potencia de modo conmutado que alimentan múltiples cargas, siendo un elemento crítico en los sistemas de transmisión. En algunos casos, estos fabricantes no proporcionan la información suficiente sobre la funcionalidad de los dispositivos como convertidores de potencia DC-DC, rectificadores, inversores o filtros. En consecuencia, existe la necesidad de modelar e identificar el desempeño de estos componentes para permitir que las industrias mencionadas desarrollan modelos para la etapa de diseño, para el mantenimiento predictivo, para la detección de posibles modos de fallas y para tener un mejor control del sistema eléctrico. Así, el principal objetivo de esta tesis es desarrollar modelos que sean capaces de describir el comportamiento de un convertidor de potencia, cuyos parámetros y/o topología se desconocen. Los algoritmos deben ser replicables y deben funcionar en otro tipo de convertidores que se utilizan en el campo de la electrónica de potencia. La tesis se divide en dos núcleos principales, que son la identificación de parámetros de los convertidores y el modelado de caja negra (black-box) de dispositivos electrónicos de potencia. Los enfoques propuestos se basan en algoritmos de optimización y técnicas de aprendizaje profundo que utilizan mediciones no intrusivas de las tensiones y corrientes de los convertidores para obtener un conjunto de parámetros o generar un modelo, respectivamente. En ambos casos, los algoritmos se entrenan y prueban utilizando datos reales recopilados de convertidores utilizados en aviones y vehículos eléctricos. Esta tesis también presenta cómo las metodologías propuestas se pueden aplicar a sistemas eléctricos más complejos y para tareas de diagnóstico. En conclusión, esta tesis tiene como objetivo proporcionar algoritmos que permitan a las industrias obtener modelos realistas y precisos de los componentes que están utilizando en sus sistemas eléctricos.
Enginyeria elèctrica
GOMEZ, GOMEZ MANUEL. "Multi-objective optimization of power electronic converters." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2903502.
Повний текст джерелаFalk, Olson Gustaf. "Power Electronic Stages for a TFPMSM in Wave Power Applications." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-194201.
Повний текст джерелаDirektdrivna vågenergiomvandlingssystem har utpekats som en potentiellt starkt bidragande resurs för att tillgodose världens efterfrågan på energi med andelar på uppemot 25 % av energimixen förutspådda. Anders Hagnestål bedriver forskning och utveckling av en ny typ av linjär permanentmagnetiserad transversalflödesmaskin vid Kungliga Tekniska Högskolan. Konceptmaskinen är särskilt väl lämpad för de rådande marina förhållandena genom att kunna producera stora krafter vid låga hastigheter med utomordentligt låga resistiva förluster. Maskinen går emellertid i kraftig magnetisk mättnad och drar asymmetriska strömmar vid nominell drift. Dessutom är effektfaktorn låg i jämförelse med standardmaskiner. Alltsomallt inför detta hårda krav på det effektelektroniska systemet och kontrollalgoritmerna. Målet med detta examensarbete har varit att designa ett funktionellt effektkonditioneringssystem som sammanfogar maskinen med det angränsande elektriska nätet. För att åstadkomma detta föreslås att en tvånivås-trefasomriktare kopplas rygg-mot-rygg till tvånivås-enfasomvandlare (aktiva likriktare) som i sin tur är kopplade till varje maskinfas. Med den här konfigurationen visas det att spänningen på den mellanliggande DC-länken kan hållas konstant med begränsat rippel, alltmedan effekt tillförs nätet vid effektfaktor ett genom att dimensionera DC-kondensatorn på rätt sätt och använda en kontrollag baserad på exakt linjärisering. Maskinens fasströmmar kan kontrolleras effektivt med hjälp av en kaskadkopplad PID-regulator med schemalagda förstärkningsfaktorer. Genom att inkludera ett lågpassfilter förväntas det att järnförlusterna i maskinen kan begränsas även vid lägre switchfrekvenser. Genom att lösa ett kostnadsoptimeringsproblem visas det att den resulterande aktiva likriktaren kan uppnå en verkningsgrad på 99.1 %. Slutligen, med det här examensarbetet som grund, föreslås det att den termiska stressen på de valda halvledarkomponentsmodulerna och järnförlusterna i maskinen utvärderas för att ytterligare förbättra designen. Om högre verkningsgrad eftersträvas hos de aktiva likriktarna kan mer komplicerade omvandlartopologier övervägas.
Espinoza, Bolaños Mauricio Antonio. "Control systems for high-power medium-voltage modular multilevel converter-based drives." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/168418.
Повний текст джерелаHoy en día, la construcción de maquinaria y plantas industriales exigen soluciones de accionamiento con un diseño flexible y escalable. En sectores industriales como la petroquímica, la minería, la generación de energía, etc., existe una demanda de soluciones con alta eficiencia, seguridad integrada y respaldo de las compañías proveedoras. En este contexto, el Convertidor Multinivel Modular (MMC) ha aparecido como una opción prometedora para accionamientos de media tensión de alta potencia debido a sus características, como modularidad total, flexibilidad de control, niveles de media tensión, calidad de potencia y posible operación sin transformador. Por lo tanto, esta tesis discute la aplicación del MMC para accionamientos de máquinas. El modelado del MMC y sus sistemas de control asociados para esta aplicación son analizados ampliamente en este documento. Específicamente, se ha propuesto un nuevo modelado basado en coordenadas dq y su sistema correspondiente sistema de control para regular el valor instantáneo de las tensiones de los condensadores del MMC. Además, se ha propuesto la integración de los sistemas de control de la máquina y del MMC para mejorar el rendimiento general del sistema. Por ejemplo, se demostró que las corrientes circulantes requeridas durante bajas frecuencias ac se reducen al considerar la interacción de ambos sistemas de control. La efectividad de las estrategias de control propuestas se validó a través de extensos resultados experimentales, que se han publicado en dos artículos (IEEE Transactions on Industrial Electronics) y seis artículos de conferencia (indexados en la base de datos Scopus), así como contribuciones importantes en otros proyectos relacionados con el control de convertidores multinivel modulares. El prototipo utilizado se compone de 18 celdas de potencia. El sistema se controla utilizando un procesador de señales digitales y dos FPGAs. Un segundo MMC con 12 celdas de potencia también se usó para algunas pruebas, conformando una unidad Back-to-Back MMC. Se probó el rendimiento dinámico y en estado estable de las metodologías de control propuestas, considerando el arranque del MMC, cambios escalón tanto en el par y las corrientes de magnetización, rampas de velocidad, pruebas de cruce por velocidad cero, operación de rotor bloqueado, operación con flujo debilitado, diferentes condiciones de carga, manipulación de la tensión dc del MMC, etc. En todos los casos, el rendimiento alcanzado es consistente con los resultados esperados. Nowadays, machinery and plant construction are demanding drive solutions with flexible and scalable design. In industrial sectors such as petrochemical, mining, power generation, etc., there is a demand for solutions with high efficiency, integrated safety and support from the supplier companies. In this context, the Modular Multilevel Converter (MMC) has appeared as a promising option for high-power medium-voltage drives due to their characteristics, such as full modularity, control flexibility, medium-voltage levels, power quality and possible transformer-less operation. Thereby, this thesis discusses the application of the MMC as a machine drive. The modelling and control systems required for this application are extensively analysed and discussed in this document. Specifically, a novel dq-based modelling of the MMC and its associated control system has been proposed to regulate the instantaneous value of the MMC capacitor voltages. Additionally, the integration of the machine and MMC control systems has been proposed to enhance the performance of the overall system. For example, it was demonstrated that the required circulating currents during low-ac frequencies are reduced by considering the interaction of both control systems. The effectiveness of the proposed control strategies is validated through extensive experimental results, which have been published in two journal papers (IEEE Transaction on Industrial Electronics) and six conference papers (indexed in the Scopus database), as well as important contributions in other projects related to the control of modular multilevel converters. The downscaled prototype utilised is composed of 18 power cells. The system is controlled using a Digital Signal Processor and two Field Programmable Gate Arrays (FPGAs). A second MMC with 12 power cells was also used for some tests, conforming a Back-to-Back MMC-based drive. The dynamic and steady-state performance of the proposed control methodologies were tested, considering the MMC starting-up, step changes in both the torque and magnetising currents, speed-ramps, zero-speed crossing test, rotor-locked operation, flux-weakening operation, different loading conditions, manipulation of the input voltage of the MMC, etc. In all cases, the achieved performance is consistent with the expected results.
Broadmeadow, Mark A. "Characterisation of the cascode gate drive of power MOSFETs in clamped inductive switching applications." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/82868/4/Mark%20Broadmeadow%20Thesis.pdf.
Повний текст джерелаKumar, Dinesh. "A new multi-motor drive system based on two-stage direct power converter." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/13515/.
Повний текст джерелаHoff, Erik Stjernholm. "Distributed Generation - Power Electronic Converters, Communication and Control." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1620.
Повний текст джерелаThis thesis tries to explain the changes in the control of power electronic converters that are possible by the use of communication. Many of the renewable energy sources such as photovoltaic panels are geographically dispersed. The power rating per generator is therefore typically low. If this kind of energy source should dominate an electrical grid, the number of generators must be high. There should also be means of controlling this large number of generators simultaneously and safely. The cost of safe communication may be too high compared to the power contribution of a single generator. The Internet offers a low-cost solution, but it cannot guarantee real-time properties. Similarly to the Internet itself, it is shown how communication errors can be detected and handled in a safe manner by the end-system, in this case the generator. The generator can detect a communication timeout, and change control algorithms in order to guard itself and the connected electricity grid. When necessary, it can also disconnect and work as a local standalone power supply. In order to be able to supply all kinds of loads, the generator (in this case an inverter) is primarily voltage controlled. This results in challenges concerning current distortion. The use of feed-forward for cancellation of common grid voltage harmonics is discussed, simulated and measured. An anti-islanding algorithm for voltage controlled inverters is also developed, simulated and measured in this thesis. A DC/DC-converter for optimized connection of a photovoltaic panel is built, exploiting the photovoltaic panel properties to reduce the size and the losses significantly. Although most contributions are connected to details and parts of the system, the interactions between communication and control are emphasized.
Thong, Weng Kwai. "Power electronic converters for motors with bifilar windings." Thesis, University of Leicester, 2005. http://hdl.handle.net/2381/30231.
Повний текст джерелаStankoviÄ, Aleksandar Mihajla. "Random pulse modulation with applications to power electronic converters." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12589.
Повний текст джерелаIncludes bibliographical references (leaves 192-203).
by Aleksandar Mihajla StankoviÄ.
Ph.D.
Rasouli, Disfani Vahid. "Optimization and Control for Microgrid and Power Electronic Converters." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5764.
Повний текст джерелаMing, Wen-Long. "Active control of voltage ripples in power electronic converters." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12343/.
Повний текст джерелаLiu, Guangyuan. "Advanced Controllers of Power Electronic Converters in DC Microgrids." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3422330.
Повний текст джерелаCaldognetto, Tommaso. "Control of Electronic Power Converters for Low-Voltage Microgrids." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3424527.
Повний текст джерелаLa tesi è focalizzata sulla gestione delle architetture di microrete di tipo master/slave, dove le risorse energetiche distribuite (DERs) sono connesse alla microrete per mezzo di convenzionali convertitori elettronici di interfaccia comandati in corrente mentre la microrete è interfacciata alla rete principale tramite un convertitore di interfaccia comandato in tensione. Il cosiddetto power-based control è utilizzato per regolare, al punto di saldo della microrete, il contributo di potenza da parte delle risorse energetiche disponibili. L'approccio di controllo garantisce un’accurata suddivisione del fabbisogno di potenza attiva e reattiva tra le DERs, tenendo conto di vincoli sia locali (i.e., a livello di DER) sia globali (i.e., a livello di microrete). L'approccio descritto per il controllo delle microreti si fonda sulla teoria conservativa delle potenze, la quale offre un metodo efficace, robusto e computazionalmente efficiente per la gestione di flussi di potenza controllabili attraverso nodi di rete distribuiti.
Kazanbas, Mehmet [Verfasser]. "Analysis and Comparison of Power Electronic Converters with Electronic Isolation / Mehmet Kazanbas." Kassel : Kassel University Press, 2015. http://d-nb.info/1074489500/34.
Повний текст джерелаKazanbas, Mehmet Cemil [Verfasser]. "Analysis and Comparison of Power Electronic Converters with Electronic Isolation / Mehmet Kazanbas." Kassel : Kassel University Press, 2015. http://nbn-resolving.de/urn:nbn:de:0002-38232.
Повний текст джерелаElwakil, Ehab. "A new converter topology for high-speed high-starting-torque three-phase switched reluctance motor drive system." Thesis, Brunel University, 2009. http://bura.brunel.ac.uk/handle/2438/3009.
Повний текст джерелаCha, Han Ju. "Analysis and design of matrix converters for adjustable speed drives and distributed power sources." Diss., Texas A&M University, 2004. http://hdl.handle.net/1969.1/1048.
Повний текст джерелаKwak, Sangshin. "Design and analysis of modern three-phase AC/AC power converters for AC drives and utility interface." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2336.
Повний текст джерелаPrabhala, Venkata Anand Kishore. "Control and applications of double input DC-DC power electronic converters." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2010. http://scholarsmine.mst.edu/thesis/pdf/Prabhala_09007dcc807bbcfe.pdf.
Повний текст джерелаVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed June 29, 2010) Includes bibliographical references (p. 95-100).
Insleay, Allan. "Neural network applications in the control of power electronic converters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ26003.pdf.
Повний текст джерелаSingh, Akanksha. "A boost current source inverter based generator-converter topology for direct drive wind turbines." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/34676.
Повний текст джерелаDepartment of Electrical and Computer Engineering
Behrooz Mirafzal
In this dissertation, a new topology for Direct-Drive Wind Turbines (DDWTs) with a new power electronics interface and a low-voltage generator design is presented. In the presented power electronics interface, the grid - side converter is replaced by a boost Current Source Inverter (CSI) which eliminates the required dc-bus capacitors resulting in an increase in the lifetime of DDWTs. The inherently required dc-link inductor for this topology is eliminated by utilizing the inductance of the Permanent Magnet Synchronous Generator (PMSG). The proposed three-phase boost CSI is equipped with Reverse-Blocking IGBTs (RB-IGBT) and the Phasor Pulse Width Modulation (PPWM) switching pattern to provide a 98% efficiency and high boost ratios ([superscript V]LL/V[subscript dc]) up to 3.5 in a single stage. In this dissertation, Phasor Pulse Width Modulation (PPWM) pattern for the boost – CSI is also modified and verified through simulation and experimental results. In order to realize potential capabilities of the boost inverter and to assist its penetration into renewable energy systems, the boost inverter dynamic behaviors are studied in this dissertation. Then, the developed models are verified using circuit simulations and experiments on a laboratory-scale boost – CSI equipped with RB-IGBTs. The developed dynamic models are used to study the stability of the boost – CSI through root locus of small signal poles (eigenvalues) as control inputs and load parameters vary within the boost inverter's operating limits. The dynamic models are also used to design the control schemes for the boost – CSI for both stand-alone and grid-tied modes of operation. The developed controllers of the boost – CSI are verified through simulation and experimental results. In this dissertation, the boost – CSI steady-state characterization equations are also developed and verified. The developed boost – CSI is used to replace the grid - side converter in a DDWT. A reliability analysis on the power electronics interface of an existing and developed topology is presented to demonstrate the increase in the mean time between failures. The boost – CSI enables conversion of a low dc voltage to a higher line-to-line voltage enabling the implementation of a low-voltage generator. This further enables a reduction in the number poles required in DDWT generators. The feasibility of the presented low-voltage generator is investigated through finite element computations. In this dissertation, a 1.5MW low-voltage generator designed for the proposed topology is compared with an existing 1.5MW permanent magnet synchronous generator for DDWTs to demonstrate the reduction in the volume, weight, and amount of permanent magnet materials required in the generator. The feasibility of the developed system is supported by a set of MATLAB/Simulink simulations and laboratory experiments on the closed-loop stand-alone and grid-tied systems.
Gezgin, Cahit. "Simultaneous control-structure optimization of power converters." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/15796.
Повний текст джерелаPirro, Matteo. "Embedded Control Systems for Performances Improvement and Energy Efficiency of Electrical Drives and Power Converters." Doctoral thesis, Università Politecnica delle Marche, 2015. http://hdl.handle.net/11566/243081.
Повний текст джерелаThe global demand for electrical energy is growing continuously, at double the growth rate of primary energy consumption. Efficient energy use, sometimes simply called energy efficiency, is the goal to reduce the amount of energy required to provide products and services. A clear transition to more electric energy systems is mandatory as energy efficiency from primary fuel to the enduser and the integration of renewables are the future key challenges. Power electronics will play a key role in this paradigm shift to more renewable electrical energy and higher energy efficiency in multiple applications. In electrical energy generation a major shift to renewables as sources of future electrical energy will happen. In the field of Power Electronics four topics must be taken into account talking about energy efficiency: electrical motors, power converters, LED lighting and HVDC. In this thesis a detailed discussion on the modelling of the most known power converters has been made and some more accurate models have been proposed to better represent the behaviour of particular topologies or working modes. Passivity-Based controllers for power factor control have been proposed and argued; they resulted particularly suited in the motor control and in the LED lighting applicative fields. A global tracking passivity–based PI controller for bilinear systems has been proposed: an example application has been presented in the field of HVDC control. Furthermore, a sliding-mode robust to load variations controller for output voltage regulation in DC--DC converters has been presented. Finally inductor current observers for the boost topology has been illustrated with the aim of making superfluous the use of expensive sensors in this topology. Each proposed algorithm has been numerically tested and many of them has been experimentally verified on embedded platforms and their performances evaluated. Experimental tests have been done in the Laboratory of Advanced Robotics of DII at Università Politecnica delle Marche, Ancona, in the Laboratory of Energy Department at Supélec, Paris and in the Laboratoire de Signaux et Systémes at Supélec, Paris.
Chen, Hanling. "AVERAGE-VALUE MODELING OF HYSTERESIS CURRENT CONTROL IN POWER ELECTRONICS." UKnowledge, 2015. http://uknowledge.uky.edu/ece_etds/78.
Повний текст джерелаMurray, Peter. "Harmonic modelling strategies for power electronic drives in electrically weak systems." Thesis, University of the West of Scotland, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361351.
Повний текст джерелаJunyent, Ferré Adrià. "Control of power electronic converters for the operation of wind generation." Doctoral thesis, Universitat Politècnica de Catalunya, 2011. http://hdl.handle.net/10803/108501.
Повний текст джерелаAquesta tesi analitza la modelització i el control per a l'operació sota diferents tipus de sots de tensió de les dues topologies més comunes d'aerogeneradors de velocitat variable de gran escala, la basada en generador d'inducció doblement alimentat i la de màquina síncrona d'imants permanents. La primera part de la tesi tracta el modelat de la turbina eòlica des de la mecànica fins als diferents tipus de generadors i el convertidor. La segona part tracta el control de l'aerogenerador. Primer, s'analitzen tres esquemes de control diferents de la màquina d'inducció doblement alimentada, començant pel tipus més bàsic, el control vectorial convencional, pensat per l'operació en equilibri, que és simulat i comparat amb mesures experimentals d'un assaig de sot de tensió, i tractant a continuació l'anomenat control vectorial amb doble referència de sincronisme i el control en referència estacionària, dos esquemes de control diferents que permeten l'operació de la màquina sota sots de tensió desequilibrats. A continuació s'analitzen i comproven experimentalment diferents mètodes de càlcul de referències pel control de convertidors amb font de tensió sota desequilibris de xarxa. Finalment, es presenta l'esquema de control vectorial de màquina síncrona d'imants permanents i una estratègia de ride-through per a aquest tipus d'aerogenerador que és avaluada en una plataforma experimental.
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.
Повний текст джерелаWan, Kai. "Advanced current-mode control techniques for DC-DC power electronic converters." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Wan_09007dcc80642d38.pdf.
Повний текст джерелаVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 4, 2009) Includes bibliographical references.
Glaser, John Stanley 1964. "Topics in large-signal behavior of power electronic converters and systems." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/282217.
Повний текст джерелаColmenares, Juan. "Extreme Implementations of Wide-Bandgap Semiconductors in Power Electronics." Doctoral thesis, KTH, Elkraftteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192626.
Повний текст джерелаQC 20160922
Sadik, Diane-Perle. "On Reliability of SiC Power Devices in Power Electronics." Doctoral thesis, KTH, Elkraftteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-207763.
Повний текст джерелаKiselkarbid (SiC) är ett bredbandgapsmaterial (WBG) som har flera fördelar,såsom högre maximal elektrisk fältstyrka, lägre ON-state resitans, högreswitch-hastighet och högre maximalt tillåten arbetstemperatur jämförtmed kisel (Si). I spänningsområdet 1,2-1,7 kV förutses att effekthalvledarkomponenteri SiC kommer att ersätta Si Insulated-gate bipolar transistorer(IGBT:er) i tillämpningar där hög verkningsgrad, hög arbetstemperatur ellervolymreduktioner eftersträvas. Förstahandsvalet är en SiC Metal-oxidesemiconductor field-effect transistor (MOSFET) som är spänningsstyrd ochnormally-OFF, egenskaper som möjliggör enkel implementering i konstruktionersom använder Si IGBTer.I detta arbete undersöks tillförlitligheten av SiC komponenter, specielltSiC MOSFET:en. Först undersöks möjligheten att parallellkoppla tvådiskretaSiC MOSFET:ar genom statiska och dynamiska prov. Parallellkopplingbefanns vara oproblematisk. Sedan undersöks drift av tröskelspänning ochbody-diodens framspänning genom långtidsprov. Ocksådessa tillförlitlighetsaspekterbefanns vara oproblematiska. Därefter undersöks kapslingens inverkanpåchip:et genom modellering av parasitiska induktanser hos en standardmoduloch inverkan av dessa induktanser pågate-oxiden. Modellen påvisaren obalans mellan de parasitiska induktanserna, något som kan varaproblematiskt för snabb switchning. Ett långtidstest av inverkan från fuktpåkant-termineringar för SiC-MOSFET:ar och SiC-Schottky-dioder i sammastandardmodul avslöjar tidiga tecken pådegradering för vissa moduler somvarit utomhus. Därefter undersöks kortslutningsbeteende för tre typer (bipolärtransistor,junction-field-effect transistor och MOSFET) av 1.2 kV effekthalvledarswitchargenom experiment och simuleringar. Behovet att stänga avkomponenten snabbt stöds av detaljerade elektrotermiska simuleringar för allatre komponenter. Konstruktionsriktlinjer för ett robust och snabbt kortslutningsskyddtas fram. För var och en av komponenterna byggs en drivkrets medkortslutningsskydd som valideras experimentellt. Möjligheten att konstrueradiodlösa omvandlare med SiC MOSFET:ar undersöks med fokus påstötströmmargenom body-dioden. Den upptäckta felmekanismen är ett oönskat tillslagav den parasitiska npn-transistorn. Slutligen utförs en livscykelanalys(LCCA) som avslöjar att introduktionen av SiC MOSFET:ar i existerandeIGBT-konstruktioner är ekonomiskt intressant. Den initiala investeringensparas in senare pågrund av en högre verkningsgrad. Dessutom förbättrastillförlitligheten, vilket är fördelaktigt ur ett riskhanteringsperspektiv. Dentotala investeringen över 20 år är ungefär 30 % lägre för en omvandlare medSiC MOSFET:ar även om initialkostnaden är 30 % högre.
QC 20170524
Loh, Poh Chiang 1973. "A universal flux/charge modulation strategy for three-phase power electronic converters." Monash University, Dept. of Electrical and Computer Systems Engineering, 2002. http://arrow.monash.edu.au/hdl/1959.1/8087.
Повний текст джерелаDu, Toit J. A. (Jacques Andre). "Development and analysis of a distributed control strategy for power electronic converters." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52761.
Повний текст джерелаENGLISH ABSTRACT: The dissertation presents an alternative approach to the control of power electronic converters. The conventional approach is to use a centralized controller with one or more measurement systems providing feedback. As converters become larger, in both power rating and complexity, a number of drawbacks to this approach emerge. The number of physical data paths increases and voltage isolation becomes a problem. This has an adverse effect on the manufacturability as well as the reliable operation of the system as a whole. An alternative is to use a distributed control approach, where a number of smaller integrated control and measurement units are used. These units communicate with the central controller via a serial daisy-chain communications link. The dissertation investigates the design of such a controller as well as the application of distributed control in a number of emerging converter topologies. It was shown that centralized control has its limitations in modem power electronics in terms of reliability, maintainability and manufacturability. A feasible distributed control strategy was proposed and implemented and the operation was verified in an experimental converter system.
AFRIKAANSE OPSOMMING: Die proefskrif ondersoek 'n alternatiewe manier om drywings omsetters te beheer. Huidiglik word die meerderheid van omsetters beheer vanaf 'n sentrale beheereenheid, wat dan stelsel data versamel vanaf een of meer meetstelsels. Soos die drywingsvermoë van die omsetters toeneem, raak spannings isolasie en die aantal beheerseine 'n probleem, wat nadelig is vir die betroubaarheid en vervaardigbaarheid van die stelsel. As 'n alternatief, kan 'n aantal kleiner beheereenhede en meetstelsels gebruik word. Die beheerders kommunikeer met mekaar, sowel as die hoof stelselbeheerder deur middel van 'n optiese vesel netwerk, verbind in 'n ring struktuur. Die proefskrif ondersoek die ontwerp van die beheerder en die toepassing van gedesentraliseerde beheer in 'n aantal nuwe omsetter topologië. Die studie toon dat sentrale beheer problematies kan raak soos die omsetters meer kompleks raak. Die studie bewys dat 'n stelsel suksesvol bedryf kan word deur gebruik te maak van gedesentraliseerde beheer deur dit in 'n praktiese opstelling toe te pas.
Samavatian, Vahid. "A Systematic Approach to Reliability Assessment of DC-DC Power Electronic Converters." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT028.
Повний текст джерелаReliable and unceasing exploitation of power electronic converters plays a major part in every application. This PhD thesis comes up with new opened-up reliability assessment frameworks and demonstrates the feasibility of using multistate degraded system analysis and interval analysis as well for attaining much more accuracy in reliability evaluation. Considering self- and coupling degradation effects of the items and assessing reliability in the system level are important issues which are still lacking in the previous studies and the present thesis has made an effort to overcome these problems. The thesis tries to launch two distinct reliability assessment frameworks, namely interval reliability and Multistate degraded system reliability.Interval reliability is capable of introducing an interval useful lifetime for DC-DC power electronic converters in which the self and coupling degradations effects of items have been taken into account. Fundamentally, it is based on the conventional physics of failure reliability assessment. Based on this method, instead of obtaining an inaccurate reliability value, one can attain an interval for the reliability of a global system whose useful lifetime undoubtedly lays between the boundaries. This method is able to consider degradation dependencies and assess multi-component system level reliability but not redundant system. An attempt was made to enhance the conventional reliability framework to reach a systematic approach capable of estimating a reliability assessment considering self and mutual degradation effects and being able to evaluate system-level reliability including redundant system. Multistate degraded system reliability analysis is capable of estimating system-level reliability, while mission profile and physics of failure of the system’s items are taken into account. In addition, the self and mutual degradation effects of items on the operation of the global system have been considered. The multi-state degraded system reliability model exposed to multiple failure processes has been generalized. The operating condition of the global system is defined by a finite number of states. Not only can the proposed framework be employed in determining the reliability of the degraded systems in terms of multi-state functions, but also it can obtain the states of the systems by estimating the system state probabilities.As an application, a DC-DC power electronic system containing three critical items has been studied. In this case study, two power semiconductors, namely IGBT and diode, and a power capacitor have been considered as three degradation processes and their aging effects on the useful lifetime estimation of the power electronic system have been discussed. For having a sense about newly proposed reliability frameworks, a 3000W and 200/400 V conventional DC-DC converter for electric vehicle application exposed to WLTP driving cycle is considered
Bakar, Muhammad Abu. "Design and optimization of soft switched power converters for low and medium power applications." Licentiate thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-29801.
Повний текст джерелаVid tidpunkten för seminariet var följande delarbeten opublicerade: delarbete 4 under granskning.
At the time of the licentiate seminar the following papers were unpublished: paper 4 under review.
Sandells, David William. "Investigation into chain-cell converters and their use within power systems." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289841.
Повний текст джерелаAm, Sokchea. "Power modules design and optimization for medium power of MMC inverters : high insulation voltage gate driver system and 3D packaging." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT095/document.
Повний текст джерелаIn this research, the author focuses on both a design optimization for a Medium Voltage Modular Multilevel Converter (MV-MMC) use as a DC/AC or AC/DC converter and gate drivers systems for IGBT modules which are used in this kind of application. For example, the MMC converters are used in Medium-Voltage Direct Current (MVDC) electrical ship power systems. For such application, according to IEEE document, the DC bus voltage can be up to 35kV. Hence, gate drivers’ systems for IGBT modules for MVDC-MMC applications are major concerns in terms of architectures and insulation voltage capabilities. Thus, this dissertation provides solutions to answer these problems. The study also includes the studies of a dielectric material which is used as insulation material. The results of experimental tests of a proposed dielectric material for different layers thicknesses to sustain different insulation voltage levels are also provided to clearly validate this study. Actually, a MMC converter composes of a number of converter cells connected in series. One cell (converter’s sub-module) is classically composed of two IGBT modules. Based on the cell topology, a challenged gate driver’s architecture for power semiconductor modules is proposed and compared to the classical one in terms of high and low galvanic insulation voltage levels’ requirements, converter’s cell size, etc