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Dissertations / Theses on the topic 'Multilevel Current Source Inverter'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Moghadam, Mansour Salehi. "Current-source-based low frequency inverter topology." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12750.

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A DC to AC inverter can be classified in different topologies; some of these topologies are three level and multilevel inverter. Both types have some advantages and disadvantages. Three level inverters can be applied for low power applications because it is cheaper and has less semiconductor losses at high switching frequencies with poor total harmonic distortion (THD). Multilevel inverters (MLI) can be applied for higher power applications with less THD. However, the MLI has more cost and conductive power losses in comparison with three level inverters. In order to overcome the limitations of

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2

Almaktoof, Ali Mustafa Ali. "Multilevel inverters using finite set- model predictive current control for renewable energy systems applications." Thesis, Cape Peninsula University of Technology, 2015. http://hdl.handle.net/20.500.11838/1202.

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Thesis submitted in fulfilment of the requirements for the degree Doctor of Technology: Electrical Engineering in the Faculty of Engineering at the Cape Peninsula University of Technology<br>This research focuses on the predictive current control of multilevel converters with the aim of providing an optimized system for three-phase, multilevel inverters (MLIs) so that the load current and the voltage of the capacitors can be controlled. A model predictive current control algorithm is proposed, specifically directed at the utilisation of power obtained from renewable energy systems (RESs). The

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3

Gorgani, Aida Gorgani. "Quasi Z-Source-Based Multilevel Inverter For Single Phase Photo Voltaic Applications." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1471615403.

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4

Woolaghan, Stephen John. "Current source inverters for PM machine control." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/current-source-inverters-for-pm-machine-control(cf31f106-f7b5-475d-a5c1-8da80c06fc8a).html.

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Brushless permanent magnet (PM) drive systems offer a high efficiency over a wide power/torque-speed operating envelope, however, there are a number of problems that may limit, or complicate, their operation particularly in automotive and aerospace vehicular applications, i.e. the loss of control of the power silicon gate drive circuitry during fluxweakening operation, control of high-speed low-inductance machines and the presence of large electrolytic capacitors on the inverter DC link. Current Source Inverters (CSIs) could potentially address some or all of the above issues. However, they ha

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5

Ahmed, Eshita. "Hybrid Renewable Energy System Using Doubly-Fed Induction Generator and Multilevel Inverter." Thesis, North Dakota State University, 2012. https://hdl.handle.net/10365/26501.

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The proposed hybrid system generates AC power by combining solar and wind energy converted by a doubly-fed induction generator (DFIG). The DFIG, driven by a wind turbine, needs rotor excitation so the stator can supply a load or the grid. In a variable-speed wind energy system, the stator voltage and its frequency vary with wind speed, and in order to keep them constant, variable-voltage and variable-frequency rotor excitation is to be provided. A power conversion unit supplies the rotor, drawing power either from AC mains or from a PV panel depending on their availability. It consists of a mu

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6

Abu-Khaizaran, Muhammad Sharif M. "The design of high power IGBT based current source inverter drive." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619760.

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7

Zhang, Yushu. "Multilevel voltage source converters in high voltage direct current transmission systems." Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25814.

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This research focuses on voltage source multilevel converters in high voltage direct current (HVDC) transmission systems. The first Voltage Source Converter based HVDC (VSC-HVDC) systems with series connected IGBTs in a two-level converter represented a solution to meet industrial and economical requirements but is associated with significant drawbacks such as high dv/dt and di/dt, high switching loss, and poor output voltage and current quality. To overcome these issues, the multilevel converter was proposed for HVDC application. The Modular Multilevel Converter (M2C) was the first multilevel

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8

Norman, Rosemary Anne. "High-performance current regulation for voltage-source-inverter-fed induction motor drives." Thesis, University of Bradford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.514187.

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9

Zhang, Xiaohu. "Control Strategy of Cascaded H-Bridge Multilevel Inverter with PV System as Separate DC Source." Thesis, KTH, Elektrisk energiomvandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-53663.

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The integration of solar energy to the power grid is a challenging topic nowadays. Many topologies and control methods have already been proposed. In this thesis, the cascaded H-bridge (CHB) multilevel inverter is adopted for the photovoltaic (PV) energy integration. The purpose of this thesis is to develop a control strategy for the CHB multilevel inverter with PV array as separate DC source. The thesis first gives a short review of the three commonly used multilevel inverter topologies. Then the PV array with maximum power point tracker (MPPT) is modeled. The selection mechanism with some im

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10

Alamri, Basem Rashid. "Losses and cost optimisation of PV multilevel voltage source inverter with integrated passive power filters." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/14537.

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Nowadays, the need for more contributions from renewable energy sources is rapidly growing. This is forced by many factors including the requirements to meet the targeted reductions of greenhouse gas emissions as well as improving the security of energy supply. According to the International Renewable Energy Agency (IRENA) report 2016, the total installed capacity of solar energy was at least 227 GWs worldwide by the end of 2015 with an annual addition of about 50 GWs in 2015, making solar power the world’s fastest growing energy source. The majority of these are grid-connected photo voltaic (

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11

Al, Shammeri Bashar Mohammed Flayyih. "A novel induction heating system using multilevel neutral point clamped inverter." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/8305.

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This thesis investigates a novel DC/AC resonant inverter of Induction Heating (IH) system presenting a Multilevel Neutral Point Clamped (MNPCI) topology, as a new part of power supply design. The main function of the prototype is to provide a maximum and steady state power transfer from converter to the resonant load tank, by achieving zero current switching (ZCS) with selecting the best design of load tank topology, and utilizing the advantage aspects of both the Voltage Fed Inverter (VFI) and Current Fed Inverter (CFI) kinds, therefore it can considered as a hybrid-inverter (HVCFI) category

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12

Vidales, Luna Benjamin. "Architecture de convertisseur intégrant une détection de défauts d'arcs électriques appliquée au sources d'énergie continues d'origine photovoltaïques." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0040.

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Détection de défaut d'arcs intégrée dans un convertisseur intelligent contrôlé par FPGA pour les panneaux photovoltaïques. La mise au point de convertisseur intelligents intégrant des dispositifs de protection est une thématique que cherche à développer l'Institut Technologique de Morelia (Mexique) avec laquelle nous collaborons sur ce projet. L'objectif plus spécifique de ce travail repose sur la détection de défauts d'arc électrique en se basant sur le contrôle intelligent des onduleurs utilisés dans la gestion de l'énergie produite par des panneaux photovoltaïques. Depuis plusieurs années,

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13

Photong, Chonlatee. "A current source inverter with series AC capacitors for transformerless grid-tied photovoltaic applications." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13128/.

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The Current Source Inverter (CSI) is one of the simplest power converter topologies that can convert DC to AC and feed power generated from photovoltaic (PV) cells into the AC grid with a single power conversion stage over the whole PV voltage range. The CSI also provides smooth DC current which is one of the requirements of the PV cells as well as preventing reverse current using unidirectional switches. However, the CSI operates with low efficiency at lower PV voltages, which is where the PV cells produce maximum output power. This low efficiency is caused by large differences in voltage lev

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14

Singh, 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.

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Doctor of Philosophy<br>Department of Electrical and Computer Engineering<br>Behrooz Mirafzal<br>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 Permane

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15

Chen, Baifeng. "High-efficiency Transformerless PV Inverter Circuits." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/56686.

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With worldwide growing demand for electric energy, there has been a great interest in exploring photovoltaic (PV) sources. For the PV generation system, the power converter is the most essential part for the efficiency and function performance. In recent years, there have been quite a few new transformerless PV inverters topologies, which eliminate the traditional line frequency transformers to achieve lower cost and higher efficiency, and maintain lower leakage current as well. With an overview of the state-of-the-art transformerless PV inverters, a new inverter technology is summarized in th

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16

Murray, Nicholas John. "Flexible Power control in Large Power Current Source Conversion." Thesis, University of Canterbury. Electrical and Computer Engineering, 2008. http://hdl.handle.net/10092/2610.

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This thesis describes a new concept, applicable to high-power current-sourced conversion (CSC), where a controllable ﬁring-angle shift is introduced between series and parallel converters to enable independent active and reactive power control. The ﬁring-shift concept solves a difficult problem, by giving thyristor based CSCs the control ﬂexibility of pulse-width modulated (PWM) converters, but without a loss in efficiency or rating. Several conﬁgurations are developed, based on the ﬁring-shift concept, and provide ﬂexible, eﬃcient solutions for both very high power HVDC transmission, and very

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17

Un, Emre. "Common Mode Voltage And Current Reduction In Voltage Source Inverter Driven Three Phase Ac Motors." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609062/index.pdf.

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In this thesis various reduced common mode voltage (RCMV) pulse width modulation (PWM) techniques and active/passive common mode voltage (CMV) reduction methods for voltage source inverter driven three-phase AC motors are theoretically and practically investigated. A novel RCMV-PWM method, the near state PWM (NSPWM) method is proposed for operation at high modulation index. At low modulation index, a modified version of an existing RCMV-PWM method, AZSPWM1, termed as MAZSPWM, is proposed to mitigate the voltage reflection problem of the method. An optimum modulation algorithm combining NSPWM a

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18

Alves, rodrigues Luis Gabriel. "Design and characterization of a three-phase current source inverter using 1.7kV SiC power devices for photovoltaic applications." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT030.

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Classiquement, la chaîne de conversion de l’énergie électrique des centrales photovoltaïques comporte un champ photovoltaïque (PV) délivrant une tension maximale de 1kV suivi d’un hacheur élévateur connecté à un onduleur de tension triphasé. Cette chaîne de conversion à deux étages (DC/DC + DC/AC) est ensuite raccordée sur le réseau moyenne tension au travers d’un transformateur BT/HTA. Dans l’objectif de simplifier les systèmes de conversion PV, ce travail de recherche s’intéresse à l’étude et la mise en œuvre d’une topologie DC/AC n’employant qu’un seul étage de conversion : l’Onduleur de Co

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19

Titiz, Furkan Kaan [Verfasser], Doncker Rik W. [Akademischer Betreuer] De, and Sibylle [Akademischer Betreuer] Dieckerhoff. "A three-phase low-voltage grid-connected current source inverter / Furkan Kaan Titiz ; Rik W. de Doncker, Sibylle Dieckerhoff." Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/1216040907/34.

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Titiz, Furkan Kaan Verfasser], Doncker Rik W. [Akademischer Betreuer] [De, and Sibylle [Akademischer Betreuer] Dieckerhoff. "A three-phase low-voltage grid-connected current source inverter / Furkan Kaan Titiz ; Rik W. de Doncker, Sibylle Dieckerhoff." Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/1216040907/34.

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21

Gannett, Robert Ashley. "Control Strategies for High Power Four-Leg Voltage Source Inverters." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34251.

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In recent decades there has been a rapidly growing demand for high quality, uninterrupted power. In light of this fact, this study has addressed some of the causes of poor power quality and control strategies to ensure a high performance level in inverter-fed power systems. In particular, specific loading conditions present interesting challenges to inverter-fed, high power systems. No-load, unbalanced loading, and non-linear loading each have unique characteristics that negatively influence the performance of the Voltage Source Inverter (VSI). Ideal, infinitely stiff power systems are uni

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22

Zare, Firuz. "Multilevel converter structure and control." Thesis, Queensland University of Technology, 2001. https://eprints.qut.edu.au/36142/7/36142_Digitsed%20Thesis.pdf.

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In recent years, multilevel converters are becoming more popular and attractive than traditional converters in high voltage and high power applications. Multilevel converters are particularly suitable for harmonic reduction in high power applications where semiconductor devices are not able to operate at high switching frequencies or in high voltage applications where multilevel converters reduce the need to connect devices in series to achieve high switch voltage ratings. This thesis investigated two aspects of multilevel converters: structure and control. The first part of this thesis foc

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23

Ekström, Rickard. "Offshore Marine Substation for Grid-Connection of Wave Power Farms : An Experimental Approach." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229191.

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Wave power is a renewable energy source with great potential, which is why there are more than a hundred ongoing wave power projects around the world. At the Division of Electricity, Uppsala University, a point-absorber type wave energy converter (WEC) has been proposed and developed. The WEC consists of a linear synchronous generator placed on the seabed, connected to a buoy floating on the surface. Power is absorbed by heave motion of the buoy, and converted into electric energy by the generator. The point-absorber WEC must be physically much smaller than the wavelength of the incoming waves

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24

Danilovic, Milisav. "Active Source Management to Maintain High Efficiency in Resonant Conversion over Wide Load Range." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/76618.

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High-frequency and large amplitude current is a driving requirement for applications such as induction heating, wireless power transfer, power amplifier for magnetic resonant imaging, electronic ballasts, and ozone generators. Voltage-fed resonant inverters are normally employed, however, current-fed (CF) resonant inverters are a competitive alternative when the quality factor of the load is significantly high. The input current of a CF resonant inverter is considerably smaller than the output current, which benefits efficiency. A simple, parallel resonant tank is sufficient to create a high-p

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Venugopal, S. "Study On Overmodulation Methods For PWM Inverter Fed AC Drives." Thesis, Indian Institute of Science, 2006. https://etd.iisc.ac.in/handle/2005/278.

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A voltage source inverter is commonly used to supply a variable frequency variable voltage to a three phase induction motor in a variable speed application. A suitable pulse width modulation (PWM) technique is employed to obtain the required output voltage in the line side of the inverter. Real-time methods for PWM generation can be broadly classified into triangle comparison based PWM (TCPWM) and space vector based PWM (SVPWM). In TCPWM methods such as sine-triangle PWM, three phase reference modulating signals are compared against a common triangular carrier to generate the PWM signals fo

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Venugopal, S. "Study On Overmodulation Methods For PWM Inverter Fed AC Drives." Thesis, Indian Institute of Science, 2006. http://hdl.handle.net/2005/278.

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A voltage source inverter is commonly used to supply a variable frequency variable voltage to a three phase induction motor in a variable speed application. A suitable pulse width modulation (PWM) technique is employed to obtain the required output voltage in the line side of the inverter. Real-time methods for PWM generation can be broadly classified into triangle comparison based PWM (TCPWM) and space vector based PWM (SVPWM). In TCPWM methods such as sine-triangle PWM, three phase reference modulating signals are compared against a common triangular carrier to generate the PWM signals for

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27

McClure, Morgan Taylor. "A Modular Architecture for DC-AC Conversion." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1340812711.

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28

Nami, Alireza. "A new multilevel converter configuration for high power and high quality applications." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/33216/1/Alireza_Nami_Thesis.pdf.

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The Queensland University of Technology (QUT) allows the presentation of theses for the Degree of Doctor of Philosophy in the format of published or submitted papers, where such papers have been published, accepted or submitted during the period of candidature. This thesis is composed of ten published /submitted papers and book chapters of which nine have been published and one is under review. This project is financially supported by an Australian Research Council (ARC) Discovery Grant with the aim of investigating multilevel topologies for high quality and high power applications, with speci

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Fernández, Palomeque Efrén Esteban. "Optimization of a CSI inverter and DC/DC elevator with silicon carbide devices, for applications in electric traction systems." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/666485.

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The applications of electric traction systems currently focus on developing technologies with greater energy efficiency and lower environmental impact. Manufacturers of hybrid and electric vehicles are looking for ways to improve and optimize the efficiency of their models. Manufacturers are looking for more efficient and more compact converter topologies. The use of new band gap materials in the construction of these topologies has generated many debates and new lines of research especially in the optimization of these topologies. The silicon carbide (SiC) based switching devices provide sig

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Thacker, Timothy Neil. "Control of Power Conversion Systems for the Intentional Islanding of Distributed Generation Units." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/30814.

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Within the past decade, talk has arisen of shifting the utility grid from centralized, radial sources to a distributed network of sources, also known as distributed generation (DG); in the wake of deregulation, the California energy crisis, and northeastern blackouts. Existing control techniques for DG systems are designed to operate a system either in the connected or disconnected (islanding) mode to the utility; thus not allowing for both modes to be implemented and transitioned between. Existing detection and re-closure algorithms can also be improved upon. Dependent upon the method impleme

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Lee, Bong-ha. "Active power system compensator with fuzzy vector controller." Thesis, Queensland University of Technology, 2002. https://eprints.qut.edu.au/36152/1/36152_Lee_2002.pdf.

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Active power compensation of reactive power and harmonic distortion caused by non-linear loads can be achieved by using a current controlled, voltage-source inverter based compensator. The compensation technique used injected waveform control along with vector control based on instantaneous power theory allows a general purpose inverter based compensator to perform full compensation of var, power factor and harmonic distortion and other non-linear components. Dr. Keith Hoffman has developed an instantaneous control algorithm capable of eliminating harmonics and calculating the in-phase fund

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CARFAGNA, EMILIO. "Indagine su nuove strategie di controllo per azionamenti elettrici ad alta velocità." Doctoral thesis, Università degli studi di Modena e Reggio Emilia, 2022. http://hdl.handle.net/11380/1277906.

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L'obiettivo di questo lavoro di tesi è stato quello di investigare nuove tecniche di controllo per motori elettrici progettati per lavorare ad alta velocità. Questa tipologia di motore è caratterizzata da elevate frequenze elettriche e può essere suddivisa in: motori ad altissima velocità e motori con un elevato numero di coppie polari. Nel primo caso, il motore ad altissima velocità, viene utilizzato, per esempio, per applicazioni di pompaggio e ventilazione, mentre nel secondo caso, il motore con un alto numero di coppie polari, ad esempio lo stepper ibrido (il motore presenta solitamente 5

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Santos, Junior Francisco Antonio Ferreira dos. "Modelagem, análise e experimentação de sistema fotovoltaico isolado baseado em plataforma de simulação com diagrama de blocos." Universidade Federal da Paraíba, 2016. http://tede.biblioteca.ufpb.br:8080/handle/tede/8444.

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Submitted by Morgana Silva (morgana_linhares@yahoo.com.br) on 2016-07-26T18:10:50Z No. of bitstreams: 1 arquivototal.pdf: 2752063 bytes, checksum: 886fc73f7f66099f1e033937798f6b7e (MD5)<br>Made available in DSpace on 2016-07-26T18:10:50Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 2752063 bytes, checksum: 886fc73f7f66099f1e033937798f6b7e (MD5) Previous issue date: 2016-02-29<br>This paper presents a block diagram modeling of a grid-independent photovoltaic power generation system, including the steps of DC regulation, voltage inversion, and control system based on dynamic simulations i

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Troudi, Rami. "Étude, conception et structure de commande temps réel d'un onduleur multiniveau à partir d'une seule source DC ; applications énergies renouvelables et véhicules électriques." Thesis, Poitiers, 2021. http://www.theses.fr/2021POIT2262.

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Les travaux de recherche de la thèse de Rami Troudi répondent à trois problématiques :-la première est de concevoir un onduleur triphasé multiniveau pour des applications à base d’énergies renouvelables connectées au réseau de distribution, ou pour la motorisation des véhicules électriques. Dans la première application, l’utilisation de bras multiniveau limite fortement les inductances de couplage avec le réseau tandis que dans la deuxième application, le couple délivré par le moteur est de meilleure qualité.-la deuxième consiste à concevoir une structure de convertisseur DC-DC permettant de n

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Martins, Alex de Sá. "Análise e projeto do conversor fonte-y para uso em sistemas de geração de energia fotovoltaica de baixa tensão." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152334.

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Submitted by Alex de Sá Martins null (lex.martins@hotmail.com) on 2017-12-16T23:31:27Z No. of bitstreams: 1 ANÁLISE E PROJETO DO CONVERSOR FONTE-Y PARA USO....pdf: 2723184 bytes, checksum: 9e77f24832992941e605e87a84c25d1a (MD5)<br>Approved for entry into archive by Maria Marlene Zaniboni null (zaniboni@bauru.unesp.br) on 2017-12-18T12:51:16Z (GMT) No. of bitstreams: 1 martins_as_me_bauru.pdf: 2723184 bytes, checksum: 9e77f24832992941e605e87a84c25d1a (MD5)<br>Made available in DSpace on 2017-12-18T12:51:16Z (GMT). No. of bitstreams: 1 martins_as_me_bauru.pdf: 2723184 bytes, checksum: 9e77f2

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Dehghanikiadehi, Abbas. "Commande vectorielle innovante pour véhicules électriques ou hybrides." Thesis, Université Clermont Auvergne‎ (2017-2020), 2017. http://www.theses.fr/2017CLFAC012/document.

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Durant ces dernières années, l'intérêt pour les technologies des véhicules à faibles émissions de carbone a fait un bond important à travers l'Union européenne (UE) et au-delà, encouragé en cela par les gouvernements et les constructeurs automobiles. De grands espoirs ont été mis plus récemment dans les véhicules électriques (VE) et les véhicules électriques hybrides (VEH) en tant que technologies clés pour atténuer le changement climatique, améliorer la sécurité énergétique et favoriser une nouvelle branche de l'industrie dans le secteur automobile. Ainsi, l'électrification des transports a é

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Krug, Dietmar. "Vergleichende Untersuchungen von Mehrpunkt-Schaltungstopologien mit zentralem Gleichspannungszwischenkreis für Mittelspannungsanwendungen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-216245.

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Die vorliegende Arbeit befasst sich mit einem detaillierten Vergleich von Mehrpunkt-Schaltungstopologien mit zentralem Gleichspannungszwischenkreis für den Einsatz in Mittelspannungsanwendungen. Im Rahmen dieser Untersuchungen wird die 3-Level Neutral Point Clamped Spannungswechselrichter Schaltungstopologie (3L-NPC VSC) sowohl mit Multilevel Flying Capacitor (FLC) als auch mit Multilevel Stacked Multicell (SMC) Schaltungstopologien verglichen, wobei unter Verwendung von aktuell verfügbaren IGBT-Modulen Stromrichterausgangsspannungen von 2.3 kV, 4.16 kV und 6.6 kV betrachtet werden. Neben der

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Dash, Prajna Paramita. "A High-Performance Three-Phase Grid-Connected PV System Based On Multilevel Current Source Inverter." Thesis, 2013. http://hdl.handle.net/10012/7356.

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Current Source Inverter (CSI) topology is gaining acceptance as a competitive alternative for grid interface of renewable energy systems due to its unique and advantageous features. Merits of CSI over the more popular Voltage Source Inverter (VSI) topology have been elaborated on by a number of researchers. However, there is a dearth of quality work in modeling and control of CSI topology interfacing renewable energy resources to the grid. To enrich the study focussing on application of CSI for renewable energy interface, this thesis develops a multilevel structure based on CSI for three-phas

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Tsai, Yu-Ming, and 蔡育明. "A New Hysteresis Current Controller for Multilevel Single Phase Voltage Source Inverters." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/19223219408858703393.

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碩士<br>國立清華大學<br>電機工程學系<br>90<br>Recently, due to the rapid progress in high technology industry, much better power quality is required to meet the need of highly accurate automation machinery. As a result, how to achieve a much better performance for the core power converters has become a popular research topic in power electronics domain. In view of this, a new hysteresis current controller with controllable power factor and bi-directional power flow capability for single-phase multi-level inverters is proposed in this thesis. Owing to the fast response, easy implementation and wit

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Reddy, Polu Madhava. "Single DC Source Fed Cascaded Multilevel Inverter along with AC L-C-L Resonant Converter for High Current and Low Voltage Applications." Thesis, 2015. http://ethesis.nitrkl.ac.in/7053/1/Single_DC_Reddy_2015.pdf.

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In the beginning, the power supplies employed in very low voltage and high current application such as arc welding, electroplating process. But in this power supplies use in line frequency step-down transformers and rectifier based control circuits, which has the demerits of large size, inefficient, high output ripple and more operational costs. So there is need to improve the power supplies for high current and low voltage applications. Recently, an efficient and switched-mode power supply (SMPS) suited for low voltage and very high current applications. In this uses a multi-level inverter (M

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Dey, Anubrata. "Investigations on Online Boundary Variation Techniques for Nearly Constant Switching Frequency Hysteresis Current PWM Controller for Multi-Level Inverter Fed IM Drives." Thesis, 2012. http://etd.iisc.ac.in/handle/2005/3161.

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In DC to AC power conversion, voltage source inverters (VSI) based current controllers are usually preferred for today’s high performance AC drive which requires excellent dynamic and steady state performances at different transient and load conditions, with the additional advantages like inherent short circuit and over current protection. Out of different types of current controllers, hysteresis controllers are widely used due to their simplicity and ability to meet the requirements for a high performance AC drives. But the conventional hysteresis controllers suffers from wide variation of PW

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Dey, Anubrata. "Investigations on Online Boundary Variation Techniques for Nearly Constant Switching Frequency Hysteresis Current PWM Controller for Multi-Level Inverter Fed IM Drives." Thesis, 2012. http://hdl.handle.net/2005/3161.

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In DC to AC power conversion, voltage source inverters (VSI) based current controllers are usually preferred for today’s high performance AC drive which requires excellent dynamic and steady state performances at different transient and load conditions, with the additional advantages like inherent short circuit and over current protection. Out of different types of current controllers, hysteresis controllers are widely used due to their simplicity and ability to meet the requirements for a high performance AC drives. But the conventional hysteresis controllers suffers from wide variation of PW

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Azeez, Najath Abdul. "Studies on Current Hysteresis Controllers and Low Order Harmonic Suppression Techniques for IM Drives with Dodecagoal Voltage Space Vectors." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/2846.

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Multilevel inverters are very popular for medium and high-voltage induction motor (IM) drive applications. They have superior performance compared to 2-level inverters such as reduced harmonic content in output voltage and current, lower common mode voltage and dv/dt, and lesser voltage stress on power switches. To get nearly sinusoidal current waveforms, the switching frequency of the conventional inverters have to be in¬creased. This will lead to higher switching losses and electromagnetic interference. The problem in using lower switching frequency is the introduction of low order harmonics

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Azeez, Najath Abdul. "Studies on Current Hysteresis Controllers and Low Order Harmonic Suppression Techniques for IM Drives with Dodecagoal Voltage Space Vectors." Thesis, 2013. http://etd.iisc.ernet.in/handle/2005/2846.

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Multilevel inverters are very popular for medium and high-voltage induction motor (IM) drive applications. They have superior performance compared to 2-level inverters such as reduced harmonic content in output voltage and current, lower common mode voltage and dv/dt, and lesser voltage stress on power switches. To get nearly sinusoidal current waveforms, the switching frequency of the conventional inverters have to be in¬creased. This will lead to higher switching losses and electromagnetic interference. The problem in using lower switching frequency is the introduction of low order harmonics

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Moschopoulos, Gerasimos. "A modified pulsewidth modulated current source inverter." Thesis, 1991. http://spectrum.library.concordia.ca/4579/1/MM73682.pdf.

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Ho, Duen-Yi, and 何敦逸. "Study and Implementation of a Current-Source Inverter." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/17813417804908319447.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>92<br>The purpose of this thesis is to implement a current-source inverter with high current output capability. This current-source inverter serves as an ac power supply for electrical welding. First of all, we present four topologies of the power stages. After comparing among these four types, two of them：the full-bridge and the five-switch topologies are adopted for experiments. The control circuits of the chosen topologies are implemented with two schemes：utilizing either a single-chip microprocessor 8051, or integrated circuits. In high power systems, usuall

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XIA, QI-NAN, and 夏啟南. "Current source pwm GTO inverter for induction motor drive." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/22587199355012955337.

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吳起行. "Study on Control of Current-Source-Inverter-Fed PMSM." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/03364454154233148293.

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碩士<br>國立交通大學<br>電控工程研究所<br>101<br>This dissertation studies the control system of Current-Source-Inverter-fed PMSM. The Buck DC-DC current controller is used as an ideal current source on the DC side of Current-Source-Inverter. The parallel capacitors on the AC side of Current-Source- Inverter constitute LC low pass filters with the inductive coils of PMSM, and supply phase currents for PMSM in some switching states of CSI. We use SVPWM to generate the switch signal, and the method we use to set Dead-Time can ensure minimum switching transient and reduce the switching energy consumption. Besid

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Mufford, William Edward. "Microcontroller-based current source inverter driven induction motor drive." Thesis, 1992. http://hdl.handle.net/2429/3087.

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Current Source Inverter Induction Motor Drives (CSI-IM) are well suited to large power applications when regeneration is required. This thesis deals with the design and analysis of a flexible single chip microcontroller based CSI-IM drive. In order to demonstrate the merits of the adaptable microcontroller based system, two different types of outer loop speed/torque control strategies (Flux and Vector control) are discussed and discrete control laws are developed. Furthering the theme of microcontroller agility, two different types of inner loop current control scheme sare developed: simple pr

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Bhasagare, Mayuresh. "Three-phase multilevel solar inverter for motor drive system." Thesis, 2015. http://hdl.handle.net/1805/7929.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>This thesis deals with three phase inverters and the different control strategies that can be associated with an inverter being used together. The first part of this thesis discusses the present research in the fields of PV panels, motor drive systems and three phase inverters along with their control. This control includes various strategies like MPPT, Volts-Hertz and modulation index compensation. Incorporating these techniques together is the goal of this thesis. A new topology for operating an open end motor drive system has also

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