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Dissertations / Theses on the topic 'Current load'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Ma, Shuhan. "Load-current response to severe changes of voltage." Thesis, KTH, Elektroteknisk teori och konstruktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-203894.

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Electric loads, such as computers, lamps, refrigerators and heaters connected to low-voltage distributionsystems in homes and offices differ widely in how their current responds to changes in the applied voltage.These voltage changes could be a total collapse of the voltage, a weak or strong reduction of amplitude,or a sudden phase-shift.This thesis investigates the currents into some modern power-electronic interfaced loads, at sub-cycletimescales, in response to sudden changes of AC voltage magnitude. One reason for this interest was anearlier project about fault-location methods in which th

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2

Jonsson, Erik. "Load Current Interruption in Air for Medium Voltage Ratings." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-24327.

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Load break switches (LBSs) are common inside metal clad switchgear assemblies where space is a limiting factor. SF6 is usually used in this application due to its superior electrical characteristics, but is unfortunately also a strong greenhouse gas. Therefore development of new products, utilizing air which is an environmental friendly alternative, is in progress. Since air has much lower dielectric strength than SF6, the main challenge with this is therefore to reduce the size. Compact SF6 products have created a retrofit market, and in many existing installation sites larger products will n

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3

Moore, Jonathan E. "Frequency-based load sharing in current-mode-controlled buck converters." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA362884.

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Thesis (M.S. in Electrical Engineering) Naval Postgraduate School, March 1999.<br>"March 1999". Thesis advisor(s): John G. Ciezki, Robert W. Ashton. Includes bibliographical references (p. 103-105). Also available online.

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4

Su, Yipeng. "High Frequency, High Current 3D Integrated Point-of-Load Module." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/51248.

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Point-of-load (POL) converters have been used extensively in IT products. Today, almost every microprocessor is powered by a multi-phase POL converter with high output current, which is also known as voltage regulator (VR). In the state-of-the-art VRs, the circuits are mostly constructed with discrete components and situated on the motherboard, where it can occupy more than 1/3 of the footprint of the motherboard. A compact POL is desirable to save precious space on motherboards to be used for some other critical functionalities. Recently, industry has released many modularized POL converters,

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Garcia, Robert John. "THE EFFECTS OF COMPENSATION ON LOAD TRANSIENT RESPONSE IN SWITCHED MODE POWER CONVERTERS." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/291724.

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6

Lam, Hoi-yee. "Voltage-current trajectory a 2-dimensional approach to understand electrical load signatures /." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B3890861X.

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7

Lam, Hoi-yee, and 林凱儀. "Voltage-current trajectory: a 2-dimensional approach to understand electrical load signatures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B3890861X.

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8

Suh, Inyoung. "Determining the load composition in commercial buildings based upon harmonic current characteristics /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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9

Forslund, Johan. "Experimental Results of a Load-Controlled Vertical Axis Marine Current Energy Converter." Licentiate thesis, Uppsala universitet, Elektricitetslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-268867.

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This thesis investigates the load control of a marine current energy converter using a vertical axis turbine mounted on a permanent magnet synchronous generator. The purpose of this thesis is to show the work done in the so far relatively uncharted territory of control systems for hydro kinetic energy conversion. The work is in its early stage and is meant to serve as a guide forfuture development of the control system. An experimental power station has been deployed and the first results are presented. A comparison between three load control methods has been made; a fixedAC load, a fixed puls

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10

Nyhlén, Erik. "Control of marine current energy conversion system." Thesis, Uppsala University, Electricity, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-129988.

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<p>This thesis involves the development of a system for control of a marine current energy conversion system. The control system is developed on the principles of load control, i.e. it aims to control the rotational speed of the turbine by controlling the power extracted from the generator. The system operates by feedback of the generator DC-voltage and current as well as the speed of the water current passing through the turbine. An IGBT-transistor controlled by an AVR-microcontroller executes control of the generator and hence the turbine. A digitally implemented PID-controller serves as the

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11

Gustafsson, Karin. "Ion Current Dependence on Operating Condition and Ethanol Ratio." Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8053.

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<p>This masters thesis investigates the possibility to estimate the ethanol content in the fuel using ion currents. Flexible fuel cars can be run on gasoline-ethanol blends with an ethanol content from0 to 85 percentage. It is important for the engine control system to have information about the fuel. In todays cars the measurements of the fuel blend are done by a sensor. If it is possible to do this with ion currents this can be used to detect if the sensor is broken, and then estimate the ethanol content until the sensor gets fixed. The benefit</p><p>of using ion currents is that the signal

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12

Pollock, Helen Geraldine Phyllis. "A series-parallel load-resonant converter for a controlled-current arc-welding power supply." Thesis, University of Warwick, 1996. http://wrap.warwick.ac.uk/4191/.

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A power supply incorporating a series-parallel load-resonant converter, capable of very efficient operation over a wide range of output power is presented. The series-parallel load-resonant converter is shown to have three pairs of resonant frequencies. Operation of the circuit at each of these resonant frequencies maintains zero current switching and high frequency operation. Design mathematics is developed which allow series-parallel load-resonant converters to be designed with specific resonant frequencies and circuit resistances. A new method of power control for series-parallel load-reson

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13

Lee, John C. "Magamp post-regulator applied to a quasi-resonant converter and magamp operation under extreme load condition in a PWM converter." Thesis, This resource online, 1988. http://scholar.lib.vt.edu/theses/available/etd-11072008-063123/.

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14

ANDERSSON, JOHAN, and RICKARD HÖGLUND. "Electric Load Driven Longboard." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279809.

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This bachelor’s thesis aims to show an extensive overview of all the parts that build up an electric load driven longboard and see if a load controlled longboard can be seen as a safe, comfortable and convenient alternative to the more common remote controlled longboard. The thesis will also answer how weight can be measured on a longboard in the most effective way, what the most comfortable riding technique is and what a good motor-battery configuration to be able to travel at 30 km/h and 10 km would be. The longboard measures the weight distribution with load cells located between the deck a

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15

Wu, Long. "Separating Load Torque Oscillation and Rotor Faults in Stator Current Based-Induction Motor Condition Monitoring." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14545.

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Stator current spectral analysis techniques are usually used to detect rotor faults in induction machines. Magnetic field anomalies in the airgap due to the rotor faults result in characteristic side-band harmonic components in the stator current spectrum, which can be measured as rotor fault signatures. A position-varying load torque oscillation at multiples of the rotational speed, however, has exactly the same effect. Stator current harmonics due to a load torque oscillation often obscure and even overwhelm rotor eccentricity fault detection since the magnitude of load oscillation induce

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16

Yao, Qifeng. "Experimental Investigation and Statistical Analysis of Entrainment Rates of Particles in Suspended Load." Kyoto University, 2019. http://hdl.handle.net/2433/244513.

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17

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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18

Lízner, Václav. "Nízkofrekvenční aktivní umělá zátěž." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316439.

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This diploma thesis is focused on synthetic loads, especially electronically controlled loads. The thesis analyse principles of mechanically and electronically controlled loads and theirs operation modes. The paper also carried out a search of AC loads available on the market. The parameters of the AC load were based on the requirements provided by client. The functionality of the designed load is verified by simulation. The thesis continues with realization of the designed schematics and bringing the load to function. At the last section of the thesis are detail parameters of the designed loa

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19

Okubo, Hitoshi, Masahiro Hanai, Hiroki Kojima, and Naoki Hayakawa. "Progress in Development of Superconducting Fault Current Limiting Transformer (SFCLT)." IEEE, 2011. http://hdl.handle.net/2237/20728.

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20

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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21

Dyachuk, Eduard. "Load diagnostic of power lines to control and optimize the utilization of wind energy." Thesis, Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10090.

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22

Khopkar, Rahul Vijaykumar. "DC-DC converter current source fed naturally commutated brushless DC motor drive." Texas A&M University, 2003. http://hdl.handle.net/1969.1/1257.

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The aim of this work is to reduce the cost and size of a brushless dc motor (BLDC) drive as well as increase the reliability and ruggedness of that drive. Traditional BLDC drives use Voltage Source Inverters (VSI) that utilize hard switching, thereby generating switching losses and entail the use of large heatsinks. VSI needs a huge dc link capacitor that is inherently unreliable and is one of the most expensive components of a drive. Hence, a Current Source Inverter (CSI) is used to replace the hard switchings by natural turn-off, thereby eliminating the heatsinks as well as the large dc link

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23

Karimi, Seywan. "Dielectrics calculation of on-load tap-changer VUCL." Thesis, KTH, Hållbar produktionsutveckling (ML), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-292536.

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This is a bachelor's thesis in Mechanical engineering. The main topic of the thesis is the electrical calculation of the tap changer's shield. Although there are many kinds of tap-changers, this study focuses on VUCL models. The theoretical background of the thesis is that the new shield is suitable and useable in all VUCL models. The primary topic of the thesis is to study that the new shield protects the resistance box in the middle of the tap changers. To do this study, Creo Parametric, Comsol, and SpaceClaim are the programs used.<br>Detta är en kandidatexamen i maskinteknik. Avhandlingens

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24

Suwanasri, Thanapong. "Investigation on no load mechanical endurance and electrical degradation of a circuit breaker model under short circuit current interruption." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=979106028.

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25

Pauletti, Luiz Celestino. "Um estudo de uso de gradador de tensão em motores de indução monofásicos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/17566.

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O motor de indução é, talvez, o mais robusto e, certamente, um dos motores mais comumente usados. Graças à simplicidade de sua construção, do seu baixo custo, confiabilidade e rendimento relativamente alto com carga nominal é provável que ele permaneça sendo a principal fonte de transformação de energia elétrica em energia mecânica nas aplicações industriais e comerciais por um futuro previsível. O estudo de economia de energia pela redução de perdas é o objetivo do presente estudo. Os motores de indução operam regularmente com fluxo quase constante no entreferro e, portanto, com perdas magnét

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26

Kvalheim, Miles R. "Residental Electricity Demand: An Analysis of the Current and Future United States Electricity Grid and Its Impact on Power Consumption." Scholarship @ Claremont, 2012. http://scholarship.claremont.edu/cmc_theses/352.

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The nature of electrical power requires specific infrastructure in order to operate adequately. Currently, the United States electricity grid contains a number of bottlenecking inefficiencies that arise from the aging infrastructure of the system. This paper examines the current state of the United States electricity grid, how potential changes in weather variables can affect the electricity consumption of residential consumers, and how implementation of Smart Grid technology can potentially mitigate these issues. It is determined through regression analysis that each weather variable that was

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27

Parveen, Tania. "Composite load model decomposition : induction motor contribution." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/31301/1/Tania_Parveen_Thesis.pdf.

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In this thesis, a new technique has been developed for determining the composition of a collection of loads including induction motors. The application would be to provide a representation of the dynamic electrical load of Brisbane so that the ability of the power system to survive a given fault can be predicted. Most of the work on load modelling to date has been on post disturbance analysis, not on continuous on-line models for loads. The post disturbance methods are unsuitable for load modelling where the aim is to determine the control action or a safety margin for a specific disturbance.

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Ye, Zhihong. "Modeling and Control of Parallel Three-Phase PWM Converters." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/29476.

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This dissertation studies modeling and control issues of parallel three-phase pulse-width modulated (PWM) converters. The converters include three-phase boost rectifiers, voltage source inverters, buck rectifiers and current source inverters. The averaging of the parallel converters is performed based on a generic functional switching unit, which is called a phase leg in boost rectifiers and voltage source inverters, and a rail arm in buck rectifiers and current source inverters. Based on phase-leg and rail-arm averaging, the developed models are not only equivalent to the conventional three-p

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29

Åkergren, David. "RC Trough Bridges: A Parametric Study using FEM and an Analysis of their Current State." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-87260.

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There are approximately 4000 railway bridges in Sweden managed by the Swedish Administration of Transport (Trafikverket), of which a common construction type is the reinforced concrete (RC) trough bridge, which is a structure that consists of a slab carried by two longitudinal main beams which transfer loads towards the supports. A substantial amount of the RC trough bridge population is approaching the end of their service lives which consequently implies that the replacement of some of these bridges can be expected in the near future. Extending their service lives can yield positive effects

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Lange, Martin T. "INFLUENCE OF VOLTAGE SOURCE PULSE WIDTH MODULATED SWITCHING AND INDUCTION MOTOR CIRCUIT ON HARMONIC CURRENT CONTENT." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1230942161.

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31

Ahmed, Ismaila Idowu. "The influence of material factors, including cold work, on the susceptibility of stainless steels to stress corrosion cracking." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/the-influence-of-material-factors-including-cold-work-on-the-susceptibility-of-stainless-steels-to-stress-corrosion-cracking(19937317-f1b4-4dbc-ab0e-3eab3760f716).html.

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The main objective of the thesis was to gain better understanding of key parameters associated with Cold Work (CW) and their possible effects on Stress Corrosion Cracking (SCC) susceptibility of Austenitic Stainless Steels (ASS) cold rolled to different degrees. The microstructural characterisation of the cold rolled ASS was carried out using optical microscopy to determine and correlate the average grain size with the level of CW. The assessment of martensite development during the CW was carried out using the neutron diffraction technique. The effects of CW levels and strain paths on the lat

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32

Rajagopalan, Satish. "Detection of Rotor and Load Faults in BLDC Motors Operating Under Stationary and Non-Stationary Conditions." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11524.

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Brushless Direct Current (BLDC) motors are one of the motor types rapidly gaining popularity. BLDC motors are being increasingly used in critical high performance industries such as appliances, automotive, aerospace, consumer, medical, industrial automation equipment and instrumentation. Fault detection and condition monitoring of BLDC machines is therefore assuming a new importance. The objective of this research is to advance the field of rotor and load fault diagnosis in BLDC machines operating in a variety of operating conditions ranging from constant speed to continuous transient operat

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33

Bjurelid, Martin, and Emran Murina. "Analys & kartläggning av Uddevalla citys mellanspänningsnät." Thesis, Högskolan Väst, Avdelningen för data-, elektro- och lantmäteriteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-8291.

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Kraven på ett driftsäkert elnät ökar hela tiden i takt med att elanvändning blir allt viktigare i dagens samhälle. Luftledningar byts ut med markkabel och möjlighet till reservmatningar samt bra elkvalitet är av hög prioritering. Skicket på elnätets utrustning försämras med åren och kommer med tiden behöva bytas ut. Med uppdrag från Uddevalla Energi AB har siffror tagits fram berörande spänningsfall, kapacitiv jordfelsström och belastningar vid normaldrift och reservmatning, samt ålder och typ på kablar i Uddevalla citys mellanspänningsnät. Den här rapporten presenterar dessa resultat och ger

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Barakati, Amir. "Dynamic interactions of electromagnetic and mechanical fields in electrically conductive anisotropic composites." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/3562.

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Recent advances in manufacturing of multifunctional materials have provided opportunities to develop structures that possess superior mechanical properties with other concurrent capabilities such as sensing, self-healing, electromagnetic and heat functionality. The idea is to fabricate components that can integrate multiple capabilities in order to develop lighter and more efficient structures. In this regard, due to their combined structural and electrical functionalities, electrically conductive carbon fiber reinforced polymer (CFRP) matrix composites have been used in a wide variety of appl

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Húsek, Jan. "Dvoukvadrantový spínaný proudový zdroj pro buzení cívek." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218879.

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This master`s thesis deals with design and realization of two-quadrant switching current source for inductive loads. Output current adjustable range is 0 – 1A. Selected topology enables change of current direction. Current supply is made with TDA8920 integrated circuit. Thesis also contains basic information about switching supplies and coils.

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Rangel, Camilo Alberto Sepúlveda. "Modelo aproximado de sistemas de distribuição considerando geração distribuida e o efeito da tensão na carga." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/127892.

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Esta dissertação apresenta um modelo aproximado de rede desenvolvido para análise de sistemas de distribuição em regime permanente. O modelo é detalhado do ponto de vista matemático e teórico considerando a representação dos elementos em derivação da rede (cargas e geradores) e dos limites operacionais empregando aproximações lineares. A modelagem linear permite determinar de forma simples os valores das tensões e correntes do sistema, podendo ser empregada em problemas de otimização relacionados ao planejamento e expansão de sistemas de distribuição. A representação da carga considera a influ

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Цибуля, Ю. А. "Техніко-економічні умови приєднання СЕС «Нерафа» до електроенергетичної системи". Thesis, Чернігів, 2021. http://ir.stu.cn.ua/123456789/25268.

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Цибуля, Ю. А. Техніко-економічні умови приєднання СЕС «Нерафа» до електроенергетичної системи : випускна кваліфікаційна робота : 141 "Електроенеретика, електротехніка та електромеханіка" / Ю. А. Цибуля ; керівник роботи В. М. Бодунов ; НУ "Чернігівська політехніка", кафедра електричної інженерії та інформаційно-вимірювальних технологій. – Чернігів, 2021. – 107 с.<br>Об’єкт проєктування – сонячна електростанція встановленою потужністю 10 МВт. Мета роботи – забезпечення якості та надійності видачі генеруючої потужності сонячної електростанції в електричну мережу АТ «ЧЕРНІГІВОБЛЕНЕРГО». В даному

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Luedtke, Elin. "Minimizing Transformer No-Load Losses at Hydropower Plants : A Study of Effects from Transformer Switch-Off During Stand-by Operation." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447635.

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Hydropower is the most important power balancing resource in the Swedish electrical power system, regulating the power supply to match the load. Consequently, several hydropower plants have periods of stand-by operation where the power production is absent but where several devices within a plant are still active. Such a device is the step-up power transformer, which during stand-by operation still generates no-load energy losses. These losses can accumulate to a considerable amount of energy and costs during the long technical lifetime of the apparatus. One option to minimize these no-load en

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Blengini, Neto Adolfo. "Ambiente multim?todos para otimiza??o de opera??es em sistemas de distribui??o de energia el?trica generalizados." Pontif?cia Universidade Cat?lica de Campinas, 2017. http://tede.bibliotecadigital.puc-campinas.edu.br:8080/jspui/handle/tede/926.

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Submitted by SBI Biblioteca Digital (sbi.bibliotecadigital@puc-campinas.edu.br) on 2017-03-23T14:50:03Z No. of bitstreams: 1 ADOLFO BLENGINI NETO.pdf: 3955942 bytes, checksum: 45ddc01c026b2c6b88359672fba01257 (MD5)<br>Made available in DSpace on 2017-03-23T14:50:03Z (GMT). No. of bitstreams: 1 ADOLFO BLENGINI NETO.pdf: 3955942 bytes, checksum: 45ddc01c026b2c6b88359672fba01257 (MD5) Previous issue date: 2017-02-16<br>Pontif?cia Universidade Cat?lica de Campinas ? PUC Campinas<br>This study proposes the development of an environment for optimization of the operations of electrical distribu

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Rapant, Jaromír. "Rekonstrukce nosné ocelové konstrukce dvoupodlažního objektu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226071.

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his thesis deals with exploration of paper mill building, structural load, and assessment of current load bearing structure and proposing reconstruction. Bearing structure is entirely made out of steel and it’s done as XYZ frame. The building is located in Olsany u Sumperka, this defines the climate. The paper mill is of a platform of 54,0 x 48,25 m. It’s a two floor building with average height of 13,22m. Thesis contains foto documentation of the building and tests of strength of the steel in the bearing structure. Small statistical calculation was done, of all current elements of the steel s

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Blanchet, Floria. "Analyse et caractérisation des performances en puissance de transistors bipolaires à hétéro-jonction SiGe:C pour des applications de radiocommunications portables." Limoges, 2007. https://aurore.unilim.fr/theses/nxfile/default/f1bfd25b-e0f7-4e43-859b-0d7d3b984d33/blobholder:0/2007LIMO4018.pdf.

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Ces travaux portent sur la caractérisation de transistors de puissance bipolaires à hétéro-jonction Si/SiGe:C, issus des fonderies de STMicroelectronics Crolles, destinés aux applications de radiocommunications mobiles. Un historique des principales évolutions technologiques du transistor bipolaire est proposé. Les simulations CW, utilisant le modèle HICUM, ont mis en évidence l’influence du point de polarisation et des impédances de charge sur l’optimisation en rendement. Les simulations 2-tons et multi-tons ont confirmé le compromis rendement/linéarité. Une résolution originale pour tester l

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"Load Sharing Low Dropout Regulators Using Accurate Current Sensing." Master's thesis, 2017. http://hdl.handle.net/2286/R.I.46344.

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abstract: The growing demand for high performance and power hungry portable electronic devices has resulted in alarmingly serious thermal concerns in recent times. The power management system of such devices has thus become increasingly more vital. An integral component of this system is a Low-Dropout Regulator (LDO) which inherently generates a low-noise power supply. Such power supplies are crucial for noise sensitive analog blocks like analog-to-digital converters, phase locked loops, radio-frequency circuits, etc. At higher output power however, a single LDO suffers from increased heat dis

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Chang, Kuei-Hui, and 張貴輝. "Power Factor Improvement with Load-Current Injection for Motor Drives." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/8t829m.

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碩士<br>國立臺北科技大學<br>電力電子產業研發碩士專班<br>102<br>The purpose of this thesis is to build a single phase BOOST type Power Factor Corrector in order to a speed control system of a SRM motor driver. The front stage employs a single-phase boost type AC/DC converter, which provides the inverter stage with steady DC voltage. Then, a SRM motor is driven by the inverter to accomplish the motion control. The AC-DC converter control the perfect duty of power switch, so that the low-distortion and high-power-factor line current is obtained. The controller consists of current, voltage loop and load-current injecti

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Wu, Chun-Chieh, and 吳俊傑. "Analysis of Circulating Current for Distribution Feeders during Load Transfer." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/03568243732651492001.

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碩士<br>國立海洋大學<br>電機工程學系<br>91<br>As the load demand grows, providing steady supply of electric energy has become a long-term goal of power utilities. In the distribution system, feeders are usually switched during load transfer for sakes of system operation and maintenance. In order to keep the power quality, the task of feeder switching needs to be performed without interrupting the supply of electricity, resulting in some related problems. Due to differences in voltages and phases between two feeders, circulating current comes into existence. A large amount of circulating current during l

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Banerjee, Debmalya. "Load Commutated SCR Current Source Inverter Fed Induction Motor Drive With Sinusoidal Motor Voltage And Current." Thesis, 2008. https://etd.iisc.ac.in/handle/2005/744.

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This thesis deals with modeling, simulation and implementation of Load Commutated SCR based current source Inverter (LCI) fed squirrel cage induction motor drive with sinusoidal voltage and sinusoidal current. In the proposed system, the induction motor is fed by an LCI. A three level diode clamped voltage source inverter (VSI) is connected at the motor terminal with ac chokes connected in series with it. The VSI currents are controlled in such a manner that it injects the reactive current demanded by the induction motor and the LCI for successful commutation of the SCRs in the LCI. Additional

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Banerjee, Debmalya. "Load Commutated SCR Current Source Inverter Fed Induction Motor Drive With Sinusoidal Motor Voltage And Current." Thesis, 2008. http://hdl.handle.net/2005/744.

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This thesis deals with modeling, simulation and implementation of Load Commutated SCR based current source Inverter (LCI) fed squirrel cage induction motor drive with sinusoidal voltage and sinusoidal current. In the proposed system, the induction motor is fed by an LCI. A three level diode clamped voltage source inverter (VSI) is connected at the motor terminal with ac chokes connected in series with it. The VSI currents are controlled in such a manner that it injects the reactive current demanded by the induction motor and the LCI for successful commutation of the SCRs in the LCI. Additional

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Chiu, Ting-Sung, and 邱定松. "A Novel Design and Implementation of Current-Controlled Electronic Load Simulators." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/48318997266367855850.

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碩士<br>國立成功大學<br>電機工程學系<br>89<br>In the burn-in test of power electronic equipment, the load simulator is very useful for the evaluation of their operation performance. This motivates the design and implementation electronic load simulators proposed in this thesis. With the designated current-controlled technology, the proposed simulator can emulate the behaviors of different types of loads that includes resistive load, inductive load, capacitive load, and rectified load. In addition, this proposed system owns the ability of energy-recovering that ensures injecting the energy of high power-fact

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Pan, Jen-bang, and 潘振邦. "Design and Realization of an Inverter with Load Current Injection Method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/35374611771655466408.

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碩士<br>國立臺南大學<br>綠色能源科技研究所<br>97<br>In this thesis, an inverter circuit embedded with supercapacitor is studied. In the crcuit, a PWM-based voltage-regulated controller is adopted, where an additional current loop is used for minimizing the equivalent output impedance of the inverter in anticipation of increasing the quality of supplying voltage under different load conditions. To validate the performance of the proposed method, a prototype was implemented in the laboratory. From the hardware realization, test results under different scenarios confirm that the proposed method can offer a stable

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Huang, Chih-Huang, and 黃智煌. "Load Characteristics Analysis of Inverter of Ocean Current Power Generation System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/10502516329718184061.

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碩士<br>國立高雄應用科技大學<br>電機工程系博碩士班<br>96<br>This thesis mainly focuses on the investigation of ocean current power generation system and the assessment of its load characteristics. In experimental setup, an ocean current producing unit with an 4 ton capacity water tank is constructed for evaluating the power generation produced by the ocean energy.More specified, in the water tank, the ocean current drives a generator to rotate such that the generator provides with the power to a load. In this thesis, the power efficiency will be evaluated for converted power and unconverted power. Furthermore,

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Chu, Hung-Chieh, and 朱宏傑. "An Implementation of Hybrid Active Filter for Current-type Harmonic Load." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/03865828152791168554.

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碩士<br>國立臺灣大學<br>電機工程學研究所<br>91<br>Due to the progress of power semiconductor technologies and power electronics technologies, applications of power converters have increased significantly in recent years, such as adjustable speed drives, switching power supplies. Most of these applications require diode rectifiers or thyristor rectifiers as the AC/DC front-ends. The nonlinear nature of the front-end rectifiers draw significant harmonic current from the utility grid, which result in harmonic distortion. This thesis is concerned with the design and implementation of three-phase hybrid

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