Дисертації з теми "AC electric drive"
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吳熾華 and Che-wa Ng. "An advanced ac drive system for an electric van." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1990. http://hub.hku.hk/bib/B31231937.
Повний текст джерелаNg, Che-wa. "An advanced ac drive system for an electric van /." [Hong Kong : University of Hong Kong], 1990. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12691276.
Повний текст джерелаNoon, John Patrick. "Development of a Power Hardware-in-the-Loop Test Bench for Electric Machine and Drive Emulation." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/101498.
Повний текст джерелаMaster of Science
According to the International Energy Agency (IEA), electric power usage is increasing across all sectors, and particularly in the transportation sector [1]. This increase is apparent in one's daily life through the increase of electric vehicles on the road. Power electronics convert electricity in one form to electricity in another form. This conversion of power is playing an increasingly important role in society because examples of this conversion include converting the dc voltage of a battery to ac voltage in an electric car or the conversion of the ac power grid to dc to power a laptop. Additionally, even within an electric car, power converters transform the battery's electric power from a higher dc voltage into lower voltage dc power to supply the entertainment system and into ac power to drive the car's motor. The electrification of the transportation sector is leading to an increase in the amount of electric energy that is being consumed and processed through power electronics. As was illustrated in the previous examples of electric cars, the application of power electronics is very wide and thus requires different testbenches for the many different applications. While some industries are used to power electronics and testing converters, transportation electrification is increasing the number of companies and industries that are using power electronics and electric machines. As industry is shifting towards these new technologies, it is a prime opportunity to change the way that high power testing is done for electric machines and power converters. Traditional testing methods are potentially dangerous and lack the flexibility that is required to test a wide variety of machines and drives. Power hardware-in-the-loop (PHIL) testing presents a safe and adaptable solution to high power testing of electric machines. Traditionally, electric machines were primarily used in heavy industry such as milling, processing, and pumping applications. These applications, and other applications such as an electric motor in a car or plane are called motor drive systems. Regardless of the particular application of the motor drive system, there are generally three parts: a dc source, an inverter, and the electric machine. In most applications, other than cars which have a dc battery, the dc source is a power electronic converter called a rectifier which converts ac electricity from the grid to dc for the motor drive. Next, the motor drive converts the dc electricity from the first stage to a controlled ac output to drive the electric machine. Finally, the electric machine itself is the final piece of the electrical system and converts the electrical energy to mechanical energy which can drive a fan, belt, or axle. The fact that this motor drive system can be generalized and applied to a wide range of applications makes its study particularly interesting. PHIL simplifies testing of these motor drive systems by allowing the inverter to connect directly to a machine emulator which is able to replicate a variety of loads. Furthermore, this work demonstrates the capability of PHIL to emulate both the induction machine load as well as the dc source by considering several rectifier topologies without any significant adjustments from the machine emulation platform. This thesis demonstrates the capabilities of the EGSTON Power Electronics GmbH COMPISO System Unit to emulate motor drive systems to allow for safer, more flexible motor drive system testing. The main goal of this thesis is to demonstrate an accurate PHIL emulation of a induction machine and to provide validation of the emulation results through comparison with an induction machine.
Petrarca, Ivan. "Unified analysis and operating point calculation of AC drives." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Знайти повний текст джерелаСерга, Богдан Петрович. "Векторно-керований асинхронний електропривод садового міні-трактора". Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2021. https://ela.kpi.ua/handle/123456789/42601.
Повний текст джерелаThe diploma project contains: pages – 72, figures - 18, tables - 5 In this diploma project the traction asynchronous electric drive of a garden mini-tractor was investigated. An analytical review was conducted. The engine is selected. The functional scheme of the system is developed and the synthesis of regulators for vector control is performed. The simulation results confirmed the efficiency and effectiveness of the designed system. Execution of this diploma project was provided by using the following programs: Microsoft Office Word, Microsoft Office Visio, Matlab.
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 джерелаGreen, Simon Richard. "Permanent magnet drives in the more-electric aircraft." Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327196.
Повний текст джерелаAlam, S. M. Mahfuz. "Direct Torque Control of AC Machine Drives." Thesis, Southern Illinois University at Edwardsville, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10128872.
Повний текст джерелаField oriented control (FOC) and direct torque control (DTC) are the two most important control strategies for modern advanced machine drives. Field oriented control (FOC) has been widely used as the industrial motor drives. The direct torque control has been recently developed by Takashi and has shown great potential in machine drive applications. This thesis discusses the performances of direct torque control on AC machine drives including the industrial workhorse induction machines (IM) and permanent magnet synchronous machines (PMSM). Both of the IM and PMSM dynamics models are derived in details in the thesis. By applying nonlinear filtering techniques, the sensorless direct torque control of AC machine drives are studied. MATLAB simulations have shown the efficacy and superior performance of the resilient extended Kalman filter over the traditional extended Kalman filter for direct torque control applications.
Dordevic, Obrad. "PWM strategies fo multilevel multiphase AC drives." Thesis, Liverpool John Moores University, 2013. http://researchonline.ljmu.ac.uk/6188/.
Повний текст джерелаOdiete, G. C. E. "AC voltage adjustment and controlled compensation of electrical power drives." Thesis, University of Bradford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373229.
Повний текст джерелаCoombe, H. Scott. "Development of a dynamic model of a mechanically driven polyphase AC generator /." This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-03172010-020029/.
Повний текст джерелаLarbes, Cherif. "Boost modulation : control of AC variable speed drives." Thesis, Lancaster University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304281.
Повний текст джерелаHead, Miles. "AC Direct Drive LED Lighting Using Low Cost Analog Components." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/1987.
Повний текст джерелаPietiläinen, Kai. "Voltage sag ride-through of AC drives : control and analysis." Doctoral thesis, KTH, School of Electrical Engineering (EES), 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-450.
Повний текст джерелаThis thesis focuses on controller design and analysis for induction motor (IM) drives, flux control for electrically excited synchronous motors with damper windings (EESMs), and to enhance voltage sag ride-through ability and analysis for a wind turbine application with a full-power grid-connected active rectifier. The goal is to be able to use the existing equipment, without altering the hardware. Further, design and analysis of the stabilization of DC-link voltage oscillations for DC systems and inverter drives is studied, for example traction drives with voltage sags in focus.
The proposed IM controller is based on the field-weakening controller of Kim and Sul [31], which is further developed. Applying the proposed controller to voltage sag ride-through gives a cheap and simple ride-through system.
The EESM controller is based on setpoint adjustment for the field current controller. The analysis also concerns stability for the proposed flux controller.
The DC-link stabilization algorithm is designed following Mosskull [38], where a component is added to the current controller. The algorithm is further developed.
Analysis is the main focus, and concerns the impact of the different parameters involved. Proper parameter selection for the controller, switching frequency, and DC-link capacitor is given.
The impact of voltage sags is investigated for a power-grid-connected rectifier. Here, we analyze the impact of different types of voltage sags and phase-angle jumps. The analysis gives design rules for the DC-link capacitor and the switching frequency.
Experimental results and simulations verify the theoretical results.
Akin, Bilal. "Low-cost motor drive embedded fault diagnosis systems." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1488.
Повний текст джерелаPark, Joon B. "Fault-Tolerant Nonlinear Estimator-Based Direct Torque Control of Sensorless AC Motor Drives." Thesis, Southern Illinois University at Edwardsville, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10982121.
Повний текст джерелаThe advancement of sophisticated power electronics technology and high expectation of sensing reliability attribute to the rapid deployment of sensorless-control of AC motor drives. The purpose of this thesis is to provide the comparative studies of the extended Kalman filter (EKF), the fault tolerant extended Kalman filter (FTEKF), and the unscented Kalman filter (UKF)-based sensorless direct torque control approaches for permanent magnet AC motor (PMAC) and induction motor (IM) drives to improve Kalman filtering based state-estimation performances during external disturbances, noise and measurement failures. The proposed fault tolerant Kalman filtering control algorithm is robust to modeling uncertainties and sensing failures. Comparative of computer simulation studies and hardware implementations results have shown that the proposed second-order fault tolerant Kalman filter (SOFTEKF) provide superior state-estimation performance improvements in comparison with the unscented Kalman filter and traditional extended Kalman filter for sensorless direct torque control applications of AC motor drives.
Takasan, Kazuaki. "Nonequilibrium phenomena and dynamical controls in strongly correlated quantum systems driven by AC and DC electric fields." Kyoto University, 2019. http://hdl.handle.net/2433/242586.
Повний текст джерелаYuan, Weiqiang. "Simulation of Hexagonal Boron Nitride Deep Ultra-Violet ac-Driven Electroluminescence Devices." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1586958083835764.
Повний текст джерелаBennett, Nicholas. "A vector controlled AC drive incorporating an ultrasonic voltage source inverter and a permanent magnet synchronous machine." Thesis, University of Liverpool, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240472.
Повний текст джерелаVenugopal, S. "Study On Overmodulation Methods For PWM Inverter Fed AC Drives." Thesis, Indian Institute of Science, 2006. http://hdl.handle.net/2005/278.
Повний текст джерелаShah, Vatsal Sonikbhai. "Optimization and Up-Gradation of 3-Phase Half-Bridge Inverter Board." Thesis, Linköpings universitet, Elektroniska Kretsar och System, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-173664.
Повний текст джерелаAthanasiadis, Nikolaos P. "Modelling, control and design of Flexible AC Transmission Systems (FACTS), custom power devices and variable speed drives for transmission and distribution architectures." Thesis, University of Strathclyde, 1999. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21441.
Повний текст джерелаCetin, Nebi Onur. "Design And Implementation Of Advanced Pulse Width Modulation Techniques And Passive Filters For Voltage Source Inverter Driven Three-phase Ac Motors." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612236/index.pdf.
Повний текст джерелаAban, Vahap Volkan. "The Design, Control, And Performance Analysis Of Ac Motor Drives With Front End Diode Rectifier Utilizing Low Capacitance Dc Bus Capacitor And Comparison With Conventional Drives." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615099/index.pdf.
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 джерелаPokálený, Jan. "Trakční pohon elektromobilu napájený vodíkovým palivovým článkem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217584.
Повний текст джерелаKoteich, Mohamad. "Modélisation et observabilité des machines électriques en vue de la commande sans capteur mécanique." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC043/document.
Повний текст джерелаHigh-performance control of electric drives requires an accurate knowledge of the rotor position and/or speed. These mechanical variables are traditionally measured using sensors, which increases the cost and reduces both the robustness and the reliability of the system. This emphasizes the importance of electric drives control without shaft sensors, often referred to as sensorless control : it consists of replacing sensors with a state observer algorithm, that estimates the desired mechanical variables from currents and voltages sensing and based on the system’s model. Nevertheless, before designing a state observer, the observability ofthe system should be examined, that is, it should be checked whether the states to be estimated can be reconstructed, unambiguously, from the input/output signalsof the system.This work addresses the modeling and the observability analysis of electric drives in the view of mechanical sensors removal. Firstly, electrical machines models areelaborated, and it is shown that a unified modeling of alternating current machines is feasible, for the purpose of designing unified control and estimation strategies.The observability of the machines’ models is next studied in the view of sensorless control. The local instantaneous observability theory is applied, which enables us to formulate physically insightful analytic conditions that can be easily interpreted and tested in real time. The validity of the observability conditions is confirmed by numerical simulations and experimental data, using an extended Kalman observer.This work contributes to novel outlooks on the sensorless alternating current drives and to a deeper understanding of its properties, in order to develop higher performance estimation techniques in the critical operating conditions (mainly at standstill and/or zero-stator-frequency).The concepts introduced throughout this thesis, such as the equivalent flux and the observability vector, with the obtained results, open new horizons in a domainthat seems to become mature enough
Bárta, Jan. "Návrh elektrického stroje 6 kW, 120 000 ot/min pro turbo-cirkulátor hélia." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-369739.
Повний текст джерелаGuedes, Luiz Fernando Alves. "Conversor CA.-CC. flyback com elevado fator de potência orientado ao acionamento de LEDs de potência." Universidade Federal de Juiz de Fora (UFJF), 2012. https://repositorio.ufjf.br/jspui/handle/ufjf/4154.
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Este trabalho tem o objetivo de estudar, projetar, simular e obter resultados experimentais, a partir de um conversor flyback operando no modo descontínuo (DCM), para acionar uma luminária de diodos emissores de luz (LEDs). Além disso, deseja-se que o conversor possua elevado fator de potência, alta eficiência, baixa distorção harmônica da corrente de entrada, vida útil elevada (através da possibilidade de substituir de capacitores eletrolíticos por capacitores de filme metálico) e baixo custo. Inicialmente, o trabalho apresenta um breve estudo da iluminação a LEDs, o modelo elétrico simplificado dos LEDs, bem como uma revisão de alguns conversores aplicados ao acionamento deste tipo de fonte luminosa. Em seguida é analisada a operação do conversor flyback em modo DCM alimentado a partir da retificação (em ponte) da tensão da rede elétrica. Além do estudo teórico, a simulação do conversor é apresentada de modo a validar o projeto do conversor e servir de base de comparação com os resultados experimentais. O projeto do transformador (indutores acoplados) do conversor flyback tem destaque especial neste trabalho, pois, este elemento é fundamental para elevar a eficiência do conversor. Portanto, parte deste trabalho é dedicada ao estudo de perdas do transformador. Isto é feito através de uma adaptação de técnicas consagradas nesta área por meio de uma compilação didática visando a repetitividade do estudo. A partir do estudo teórico sobre as perdas no transformador, programas elaborados no MATLAB e no MICROSOFT EXCEL auxiliam o projeto do elemento magnético do conversor flyback. Estes dois programas, visam facilitar o exaustivo equacionamento das perdas e auxiliam no desenvolvimento de um projeto com elevada eficiência do transformador flyback elevando, consequentemente, a eficiência global do conversor. Empregando os programas elaborados, o projeto é calculado e resultados experimentais são obtidos a partir de medições realizadas em um protótipo em escala. Estes resultados são analisados e comparados com os resultados teóricos e de simulação. Ao final, é realizada uma análise simplificada do custo dos componentes do conversor e também são apresentadas as principais conclusões deste trabalho.
This work aims to study, design, simulate and obtain experimental results from a flyback converter operating in discontinuous mode (DCM), to trigger a fixture of light emitting diodes (LEDs). Furthermore, it is desired that the converter has high power factor, high efficiency, low harmonic distortion of input current, high life (through the possibility of replacing the electrolytic capacitors for metal film capacitors) and low cost. Initially, the paper presents a brief study of lighting LEDs, LEDs for simplified electrical model, as well as a review of some converters used to drive this type of light source. Then it analyzed the operation of the flyback converter in DCM mode fed from the rectification (bridged) the utility voltage. Besides the theoretical study, the simulation of the converter is presented in order to validate the design of the converter as a basis for comparison with experimental results. The transformer design (coupled inductors) flyback converter has special emphasis in this work, because this element is essential to raise the efficiency of the converter. So part of this work is devoted to the study of transformer losses. This is done by an adaptation of standard techniques in this area via a teaching order to build repeatability study. From the theoretical study on the losses in the transformer, programs developed in MATLAB and MICROSOFT EXCEL aid the design of the magnetic element of the flyback converter. These two programs are designed to facilitate the comprehensive equating of losses and assist in developing a project with high efficiency flyback transformer raising therefore the overall efficiency of the converter. Employing the programs drawn up, the project is calculated and experimental results are obtained from measurements performed on a prototype scale. These results are analyzed and compared with the theoretical results and simulation. At the end we provide a simplified analysis of the cost of the converter components and also presents the main conclusions of this work.
Wiley, Brian. "A low cost AC motor drive for battery powered applications." Thesis, 1993. http://hdl.handle.net/1957/37342.
Повний текст джерелаGraduation date: 1994
Kaarthik, R. Sudharshan. "Multilevel Dodecagonal Space Vector Structures and Modulation Schemes with Hybrid Topologies for Variable Speed AC Drives." Thesis, 2015. http://etd.iisc.ernet.in/handle/2005/2765.
Повний текст джерелаPatil, Niranjan Anandrao. "Field weakening operation of AC machines for traction drive applications." 2009. http://trace.tennessee.edu/utk_graddiss/78.
Повний текст джерелаLin, Wei-Jie, and 林煒傑. "Automatic Electrical Parameters Identification and Setting of Current Controller Gains for PMSM AC Servo Motor Drives." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/64k2f2.
Повний текст джерела國立臺北科技大學
電機工程系
106
The purpose of this paper is to propose an automatic electrical parameters identification method and setting of current controller gain for servo motor drives. Current controllers are required in prior for electrical parameters identification as comparing to previous method as shown in reference for example. Since the electrical parameters are required for current controller gain setting. In previous approach, the inaccurate current controller gains setting during electrical parameters identification may result in inaccurate parameter identification results. In contrast, the proposed electrical parameter identification improves the accuracy concern for not using current controller during identification process. Moreover, the current controller gains are set automatically once the electrical parameters are derived using the proposed method. Experimental results are derived using an RZ/T1-based platform. As confirmed the tested bandwidth of current loop is different from its designed value when the electrical parameters error exists. In contrast, the measured results show the bandwidth of current control for test agrees with that of its design using the proposed method using the proposed method and thereby confirming the effectiveness of the proposed automatic electrical parameters identification method and setting of current controller gain for servo motor drives.
Acharya, Anirudh B. "Integrated Common And Differential Mode Filters With Active Damping For Active Front End Motor Drives." Thesis, 2011. http://etd.iisc.ernet.in/handle/2005/2348.
Повний текст джерела