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1
Wong, Kwan Butt Albert. "Aspects of single-phase motor performance." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390215.
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Najjar, Mohamad. "Machine analysis : being a study of the application of the finite element method for solving the two-dimensional field of the single-phase shaded-pole induction motor." Thesis, University of Strathclyde, 1985. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21461.
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This thesis contains eight chapters, dealing with machine analysis and representation. A definition and a brief survey of previous investigation devoted to shaded-pole motors and the application of finite element method for solving the two-dimensional electromagnetic field is given in Chapter 1. An outline of the present investigation is also given. In Chapter 2, the experimental requirements and details of the equipment are given. This includes the techniques of recording the transient torque patterns and the method of measuring the complete torque-speed characteristics. The experimental methods for parameters determination are also mentioned. The finite element method is outlined in Chapter 3. This chapter deals also with the assumptions made, the formulation of the non-linear energy function, the solution of Poisson's equation and an example of a simple shape contianing 16 elements for illustrating the method. In Chapter 4, the computer program for the finite element is outlined. The iteration process and the numerical representation of the magnetization curve are mentioned. Application of the finite element method to the shaded-pole motor is also given. Calculation of parameters by finite element technique is given in Chapter 5. Self inductance is calculated using the concept of stored energy and the results of self and mutual inductances are tabulated. Basic performance equations of an electrical machine are derived in Chapter 6. Solution of the basic performance equations, by a step-by-step numerical method, is also given. In Chapter 7, the steady state performance equations are established in terms of harmonic currents and inductance coefficients. The flux linkages are evaluated by the approximated functions of mutual inductances. The electromagnetic torque is calculated from the stored energy in the magentic field. General conclusions and suggestion for further work are mentioned in Chapter 8.
3
Žuška, Martin. "Asynchronní motor se stíněným pólem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217641.
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Single-phase shade-pole motor has easy structure, and i tis chlap. It can be used as a drive of electrical fans, drive of small household appliancesor as a gramophonic motor. Motor is rotating one way only. Direction of roteting is given by positron of shading ring. Motor is not very effective, and i tis not efficient.
4
Ramayya, George Joseph. "Two-Speed Control Of Compressors In Residentlial Air-Conditioning Systems." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1401726439.
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Goynuk, Yilmaz. "Development Of An Electrical Machines Analysis And Optimum Design Software Package." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609788/index.pdf.
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In this study, three different programs are developed for the analysis of the
three-phase induction motor, single-phase capacitor type induction motor
and switched reluctance motor. The programs are developed by using Pascal
and C++ programming languages. In the performance calculations of motors,
analytical methods are used and these methods are tested for accuracy.
These programs have also capabilities to design an optimum motor, which
meets a set of performance, material and manufacturing constraints while
minimizing the weight or any other defined objective function.
In addition, in this study, an optimization tool is used to obtain an appropriate
optimization method for the design of different types of motors.
The software is tested over different commercial motors. The results illustrates
that the performance calculations and optimization approach of the
programs lead to good results.
6
Volf, Lukáš. "Výpočet jednofázového asynchronního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219750.
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This work is in the first chapter deals with the basic properties of single phase and three-phase induction motors. The following describes the procedure for obtaining a starting torque of single-phase asynchronous motor. In the second part of the calculation is carried out single-phase induction motor with a permanently connected capacitor and its control, calculation of output values, the program proposed solution to this calculation in Microsoft Excel 2007 and calculated parameters of the development of methods of calculation were compared with measured, the values supplied by ATAS Náchod.
7
Izguden, Mustafa. "Design Software Development For Induction Motors." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613229/index.pdf.
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The purpose of this thesis has been to convert two softwares called TPCAD (Three Phase Induction Machine Computer Aided Desing) and SPCAD (Single Phase Induction Machine Computer Aided Design) developed earlier for the design and analysis of three and single phase induction machines to meet the needs of motor manufacturing industry so that they can be run in windows environment. Furthermore, it was aimed to include features such as double cage motor analysis and design, to provide a facility designed motor lamination can be drawn for the user to see and facilitate sharing the designed lamination with other professional programs such as finite element analysis or thermal analysis etc.
As a result of this study, a user friendly design tool facilitating the design process of induction motors has been upgraded by using C++ Microsoft Visual Studio .Net programming language. TPCAD and SPCAD are tested with different commercial motors. The results show that the full load performance calculations are within the range of 5% error for both programs. However, starting performance calculation errors are within 10% for TPCAD, and 8% for SPCAD.
8
Bárta, Jiří. "Malé asynchronní motory pro specifické aplikace." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-241963.
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The aim of this master`s thesis is to introduce the principle of construction of a single-phase shade-pole motor and its utilization in automotive industry. It is very simple motor in its structure. The position of shading ring gives us the direction of rotation. It is used mainly when low efficiency is needed, e. g. to run electrical fans, small household appliancesor. Cheap construction is its undeniable advantage.
9
Collins, Edward Randolph Jr. "Torque and speed control of single-phase induction motors using an adjustable amplitude and phase angle auxiliary winding power supply." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/15472.
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Pařízek, Jiří. "Analýza a optimalizace energetických parametrů asynchronních strojů malého výkonu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219004.
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This thesis deals with the asynchronous engines, describes their structure, principles, properties, use, and briefly describes the design of three-phase asynchronous motor. The first section describes the most common three-phase induction motor, the emergence of the rotating magnetic field and the basic relationships. The second part deals with asynchronous motors for specific applications, their design and features. The next section is an analysis engine borrowed from the electric company ATAS Náchod, and The last section lists ways to improve the basic parameters of induction motors designed and optimized engine.
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Campos, Rafael de Farias. "Controle vetorial do motor de indução monofásico." Universidade do Estado de Santa Catarina, 2008. http://tede.udesc.br/handle/handle/1895.
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Previous issue date: 2008-07-18<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The objective of this work is to study the rotor flux vector control applied to a single-phase induction motor drive. Initially, a mathematical model of the motor will be derived. The motor equations will be transformed to the stationary reference frame so that the angular dependency due to the asymmetry of the motor variables is eliminated. Then is discussed that single-phase induction motor can be viewed as a two-phase system. A mathematical model to derive the motor parameters is presented. The next step is to analyze the rotor flux vector control, pointing out the need for a symmetry transformation of the motor parameters. Two control methods are presented: direct rotor flux control and indirect rotor flux control. Theses control methods are validated through numerical simulations. Experimental analyses making use of a digital signal processor are carried out. The results obtained show the good dynamic response when the vector control method is applied to a single-phase induction motor drive system.<br>Este trabalho tem por objetivo estudar o acionamento do motor de indução utilizando o método de controle vetorial por fluxo de rotor. Inicialmente, desenvolvido o modelo matemático do motor de indução monofásico transformado o eixo estacionário para que seja eliminada a dependência angular das variáveis do devido à assimetria dos parâmetros do motor. É observado que o motor monofásico pode ser apresentado em configuração bifásica. Em seguida, um estudo de netrização do motor é realizado. O controle vetorial é analisado na seqüência, observando a necessidade de simetria dos parâmetros do motor para que haja um controle o do motor. São considerados dois métodos: controle direto do fluxo de rotor e indireto do fluxo de rotor. Analisa-se, também, o comportamento do controle de simulações numéricas Na seqüência,implementa-se experimentalmente o controle utilizando um processador digital de sinais. Os resultados obtidos mostram que o estudado ao ser aplicado ao motor de indução monofásico apresenta uma boa ta
dinâmica para o sistema, tanto para método direto quanto para o método indireto.
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Teixeira, Fernando Henrique Pisani. "Metodologia para projeto, construção e ensaios em máquina síncrona de imã permanente - MSIP." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-27112006-085220/.
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A grande aplicação residencial de motores de indução monofásicos é em sistemas de refrigeração doméstica/comercial. O desenvolvimento de motores mais eficientes, associado ao controle de velocidade, fez com que, dentro os mais diversos tipos de motores, o motor síncrono de imã permanente tornasse objeto para a criação de uma metodologia de projeto, construção e realização de ensaios. Assim, para adequar o projeto do motor MSIP para substituição do motor de indução monofásico, foram feitos estudos de como aproveitar as laminações já existentes, através de definições das características básicas do estator e do rotor. O imã permanente a ser utilizado foi definido principalmente em função do custo do material e de suas propriedades magnéticas estarem adequadas à necessidade do projeto. O projeto magnético foi feito para maximizar o fluxo nos dentes, considerando as características construtivas e a curva de trabalho dos imãs. O projeto elétrico, a partir de um circuito equivalente do motor, permitiu explicar as relações de torque, corrente e tensão do motor MSIP, bem como a definição das bobinas do motor, quanto ao espaçamento destas entre as ranhuras, o cálculo do número de espiras e o diâmetro dos fios em função da área permitida pela ranhura da lamina do estator. Com as informações obtidas após o cálculo do motor MSIP, passou-se a construção de um protótipo constituído pelo estator, rotor e um sistema de suporte que permitisse o levantamento dos parâmetros do motor. Os parâmetros necessários foram definidos levando-se em consideração a necessidade para o projetista do conversor elétrico, sendo estes dados utilizados em simulações computacionais para a determinação do projeto do acionador. Com isto, os ensaios do motor MSIP permitiram o levantamento dos seguintes parâmetros: resistência, indutância, curvas de tensão de fase e linha da eletromotriz por velocidade em diversas rotações, momento de inércia e atrito viscoso, concluindo assim a proposta deste trabalho, e finalizando a metodologia para o motor MSIP.<br>A major residential application of single-phase induction motors is in domestic refrigeration. The development of more efficient motors, associated with speed control, has made that, among the most diverse types of electrical motors, the permanent magnet synchronous machine becomes an object of study for a design, construction and testing methodology. Therefore, to suit the PMSM design to replace the single phase induction motor, studies were made on how to take advantage of existing laminations, through definitions of the basic characteristics of the stator and rotor. The permanent magnet used was defined mainly as a function of the cost of the material and its magnetic properties since they suit the design requirements. PMSM magnetic design was made to maximize the magnetic flow in the slots considering the constructive characteristics and the magnet curve. The electric design, starting from a motor equivalent circuit, allowed to explain torque, current and voltage of the PMSM motor, as well as the definition of the motor windings regarding their filling in the slots, the calculation of coil number and the wire diameter as a function of the area allowed by the stator lamination slot. With the information obtained after the PMSM motor calculation, a prototype construction was initiated consisting of the stator, rotor and a support system to allow determining the motor parameters. The required parameters were defined taking into account the need the designer had of an electronic drive had. This data was used in computational simulations to determine the electronic driver design. After this, the motor testing allowed to identify the parameters, namely: winding resistance and inductance, various speed curves versus phase to phase and line voltage for back emf´s, moment of inertia and viscous friction, thus completing this work proposal, finalizing the project methodology for PMSM motor.
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Viajante, Ghunter Paulo. "Projeto, implementação e automação de uma bancada para ensaios de motores de indução monofásicos." Universidade Federal de Goiás, 2009. http://repositorio.bc.ufg.br/tede/handle/tede/7485.
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Previous issue date: 2009-06-02<br>This work presents the project, construction and automation of a test bench for
single-phase induction motor, up to 1 CV, based on a Brazilian Standard, ABNT 5383-
2/2007. In order to reach this purpose, theoretical studies on data acquisition systems, virtual
instrumentation, industrial communication protocols and normalized testing methodologies
are performed. After test bench construction, tests based on the Brazilian Standard are
performed, in order to test a single-phase induction motor with starting capacitor .The tests
results are presented.<br>Este trabalho apresenta o projeto, implementação e automação de uma bancada
para ensaios de motores de indução monofásicos de potência até 1 CV baseados na norma
brasileira ABNT 5383-2/2007. Para tanto, foram realizados estudos teóricos acerca de
sistemas de aquisição de dados, instrumentação virtual, protocolos de comunicação industrial
e as metodologias de ensaios apresentadas na norma. Após a construção da bancada foram
realizados os principais testes contemplados na norma brasileira em um motor de indução
monofásico com capacitor de partida e apresentados os resultados.
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Vieira, Rodrigo Padilha. "Servocontrole de velocidade aplicado a motores de indução monofásicos sem sensores mecânicos." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/8459.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This work proposes a sensorless speed control applied to single-phase induction motors
(SPIM). The objective is to present an alternative for variable speed single-phase motor
drives for residencial applications, which operate mostly with constant speed. For contextualization
in the actual scenario, firstly a bibliographic review about variable speed
operation of single-phase induction motors is presented.
After, the mathematical model that represents the single-phase induction motor dynamic
behavior is developed, and following, the model validation to obtain the electrical
parameters is done with classical experimental tests. Then, a field orientation technique
applied to single-phase induction motors is presented, where a new mathematical model
is developed for the application of this technique in this motor. Also, this work proposes a
method of single-phase induction motors rotor speed estimation using an MRAS (Model
Reference Adaptive System) algorithm, based on the calculation of the motor s reactive
power. So, some simulation results are presented for the validation of the proposed estimation
technique. The speed controller used is a discrete PI because the simplicity of
its implementation. Two discrete PI s controllers are used for current control. Finally,
experimental results obtained in a computer based environment are presented to validate
the proposed techniques with and without rotor speed sensor.<br>Este trabalho propõe um controle de velocidade sensorless aplicado a motores de indução
monofásicos. Tem-se por objetivo proporcionar uma alternativa de acionamento
com velocidade variável dos motores de indução monofásicos em aplicações residenciais,
nas quais estes geralmente operam em velocidades fixas. Para contextualização do tema
no cenário atual, inicialmente é apresentada uma revisão da literatura quanto aos acionamentos
a velocidade variável de motores de indução monofásicos.
A partir da revisão da literatura é desenvolvido o modelo matemático que representa
o comportamento dinâmico do motor de indução monofásico e, juntamente com este
tópico, a validação do modelo para obtenção dos parâmetros elétricos é feita a partir de
ensaios clássicos. Em seguida, é apresentada uma técnica de controle por orientação no
campo aplicada a motores de indução monofásicos, com a obtenção de um novo modelo
matemático onde essa técnica possa ser aplicada. Além disso, esse trabalho propõe um
método de estimação da velocidade rotórica de motores de indução monofásicos a partir de
um algoritmo MRAS (Model Reference Adaptive System), baseado no cálculo da potência
reativa deste motor. Com isso, são apresentados resultados de simulação para validação da
técnica de estimação proposta. O controlador de velocidade escolhido é um PI discreto,
que teve sua escolha definida pela simplicidade de implementação. Dois controladores
PI s discretos também são usados para o controle das malhas de corrente. Por fim, são
apresentados resultados experimentais desenvolvidos em plataforma computadorizada que
validam as técnicas propostas, tanto no controle de velocidade com a medição da mesma,
como no controle de velocidade sem o uso do sensor.
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Belica, Andrej. "Speciální asynchronní motory malého výkonu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242131.
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Master thesis deals with design and construction of the most widely used engines currently. Overall, it is divided into five chapters, the first chapter deals with constructional features of various three-phase asynchronous motors, the second chapter briefly paid attention to single-phase motors. The next chapter focuses on the specific engine types, which differ from standard induction motors in its design implementation. This is an engine with full rotor, hysteresis, linear and with shaded field. Although asynchronous motors are considered the most reliable machines work in imperfect conditions, it leads to frequent breakdowns. This is covered in chapter four. Based on the findings from previous chapters the fifth chapter includes a preliminary draft of the asynchronous motor with a full rotor. The last chapter is devoted to the measurement on functional models.
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Oliveira, Jacson Luís de. "Avaliação de estratégias de controle do motor de indução monofásico." Universidade do Estado de Santa Catarina, 2013. http://tede.udesc.br/handle/handle/2074.
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Previous issue date: 2013-01-31<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The goal of the present work is to evaluate control schemes which were developed to control the three-phase induction motor, applied in this work to control the single-phase induction motor. The development of control schemes to control fractional power electrical machines such as the single-phase induction motor has been in evidence due to the needs of improvements on efficiency energy demanded by the market. The constructive aspects of this motor does not allow to apply control schemes directly. Thus, it is necessary to model the single-phase induction motor as a two-phase motor. The model considers coordinates transformations to stationary systems. To fix the asymmetry of the motor windings, a symmetry transformation is required to apply the control schemes. Classical control schemes based on field-oriented control and direct torque control were evaluated. Numerical simulations were performed to review how these control schemes work and to verify the feasibility of experimental implementation. For control schemes based on field-oriented control, the rotor flux oriented control and the stator flux oriented control were evaluated. Some constraints on the classical direct torque control were noted due to the high switching frequencies. An alternative to the classical direct torque control to allow constant switching frequencies was evaluated. Experimental results were found by using a hardware system based on digital signal processor.<br>Este trabalho tem por objetivo avaliar estratégias de controle, originalmente desenvolvidas para controlar o motor de indução trifásico, aqui aplicadas ao controle motor de indução monofásico. O desenvolvimento de estratégias que abordam o controle de motores de potência fracionária tal como o motor de indução monofásico tem tido maior destaque devido a necessidade de melhorias na eficiência energética exigida pelo mercado. As características construtivas deste motor não permitem a aplicação direta destas estratégias, de modo que o modelamento do motor de indução monofásico deve ser realizado afim de obter o modelo em sua configuração bifásica. O modelo considera a transformação de coordenadas para um sistema de eixo estacionário e, para compensar a assimetria dos enrolamentos uma transformação de simetria é necessária para a aplicação das estratégias de controle. Foram avaliadas estratégias clássicas baseadas no controle por orientação de campo e controle direto de torque. Um estudo de simulação numérica é realizado para avaliar o comportamento destas estratégias de controle e verificar a viabilidade de implementação prática. Nas estratégias de controle por orientação de campo são analisados o controle vetorial com orientação por fluxo de rotor e o controle vetorial com orientação por fluxo de estator. Observou-se que há restrições na implementação prática de estratégias de controle baseadas no controle direto de torque clássico devido as altas freqüências de chaveamento requeridas. Uma alternativa ao controle direto de torque clássico que permite o uso de frequências fixas de chaveamento é avaliada. Resultados experimentais foram obtidos utilizando uma plataforma de hardware com processador digital de sinais.
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Kostov, Jiří. "Výpočet jednofázového asynchronního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219928.
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Diploma Thespis is focused on development, parameters and construction of one-phase induction motor underplayed by calculations. Emphasis was dealt to simplify motor development process by developed computer program. Program calculations were approved by parallel by hand calculations and by experimental measuring of real processed motor.
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Ferreyre, Frédéric. "Conception de commandes sécurisées de volet roulant sans capteur de vitesse." Phd thesis, Université Claude Bernard - Lyon I, 2010. http://tel.archives-ouvertes.fr/tel-00838016.
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Les moteurs asynchrones diphasés sont largement utilisés dans des applications de moins d'un kW, où le prix est un facteur important de choix, en particulier pour les volets roulants. Ces applications, pour des raisons de sécurité, nécessitent une détection précoce des obstacles et donc l'implantation d'un capteur de vitesse. Dans un souci de réduction de coût, une des pistes intéressantes est l'estimation de la vitesse à partir de la mesure des courants et des tensions, de manière à faire l'économie du capteur de vitesse. La première partie de notre travail a consisté à étudier et réaliser différentes alimentations : sur le secteur avec condensateur de déphasage ou par convertisseur statique. Dans une seconde partie, la modélisation du moteur en régime permanent et transitoire et celle du volet (tablier, frein, réducteur) nous a permis d'établir les caractéristiques électromagnétiques du motoréducteur et le comportement mécanique de la charge. Les paramètres de ces modèles ont été identifiés et les résultats analysés. Dans la troisième partie, à partir de ces modèles, différentes stratégies de détection de fin de course du volet sans capteur, d'arrêt sur obstacles ainsi qu'une commande de limitation de couple ont été mises au point et validées expérimentalement. Une carte électronique économique a été réalisée.
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Stival, Luiz Henrique Reis de Castilho. "Proposição de uma plataforma de acionamento do motor de indução monofásico para aplicação em lavadora de roupa." Universidade do Estado de Santa Catarina, 2010. http://tede.udesc.br/handle/handle/1905.
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Previous issue date: 2010-08-20<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The single-phase induction motor, in permanent split capacitor topology, is utilized on most of the clothes wash machines on Brazilian market. This configuration presents limitations on motor drive and on energy efficiency of the system. This work suggests a drive control method for the single-phase induction motor, aiming to deliver benefits on energy efficiency and improving motor drive. On this work, a mathematical model of the motor is derived to compare, through simulation, this proposal among different solutions. Then, the implementation of the proposal is done to gather experimental results. These results are compared to the results of the current control used on wash machines. The proposal achieved good advantages on dynamics response and
system efficiency, although impacts the final cost of the solution.<br>O motor de indução monofásico, em sua topologia de capacitor permanente, é empregado na maioria das lavadoras de roupas do mercado nacional. Esta configuração apresenta limitações no acionamento do motor, e oferece uma limitada eficiência energética do sistema. Este trabalho propõe um método de controle do motor de indução monofásico que visa oferecer benefícios em termos da eficiência energética e melhoria do acionamento do motor quando utilizado em lavadoras de roupa. No trabalho, é levantado um modelo matemático do motor para que, através de simulação, possa ser realizado um estudo comparativo da solução proposta com outras soluções. Em seguida, se dá a implementação da proposta para obtenção de resultados práticos. Estes resultados são então comparados aos resultados do controle original utilizado em lavadoras de roupa. São alcançados benefícios na dinâmica e eficiência do sistema, porém com um impacto no custo final da solução.
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Araújo, Jucélio Costa de. "Uso de realidade virtual e aumentada na visualização do fluxo do campo magnético de um motor de indução monofásico." Universidade Federal de Uberlândia, 2008. https://repositorio.ufu.br/handle/123456789/14397.
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This dissertation presents an application of Virtual and Augmented Reality, having as main
focus the study of the magnetic field created by a single-phase engine of induction during its
functioning. Virtual Reality and Augmented Reality potentially emerges every days, due
increasing number of its applications in the most varied areas of the knowledge. One of the
most benefited is Education. Therefore, these technologies becomes supporting tools for
education, for assisting in the perception and interaction of the students in diverses subjects.
The visualization of the magnetic field is related to strategies of use of ferromagnetic
elements. Such fields, the example of others (Electric Field, Gravitational Field) have threedimensional
characteristics. Since great part of the referring images to this physical
phenomenon is static what most of the time it finishes making it difficult the learning of this
subject. In this work, the Magnetic Field could be visualized, for the user, with use of Virtual
Reality or Augmented Reality. The study element will be the Magnetic Field that is generated
in an electric engine (of single-phase induction). It is intended, by means of this boarding, to
identify the advantages of if using the techniques of Virtual Reality and Augmented Reality in
relation the other forms of visualization of the magnetic field.<br>Esta dissertação apresenta uma aplicação de Realidade Virtual e Aumentada, tendo como foco
principal o estudo do campo magnético criado por um motor de indução monofásico durante o
seu funcionamento. A Realidade Virtual e a Realidade Aumentada a cada dia vêm se
destacando, devido ao surgimento de suas inúmeras aplicações nas mais variadas áreas do
conhecimento, e uma das mais beneficiadas é a educação. Portanto estas tecnologias vêm se
tornando ferramentas de apoio ao ensino, auxiliando a percepção e interação dos alunos em
assuntos diversos. A visualização do campo magnético está relacionada com estratégias de
utilização de elementos ferromagnéticos. Tais campos, a exemplo de outros (Campo Elétrico,
Campo Gravitacional) têm características tridimensionais. Sendo que grande parte das
imagens referentes a este fenômeno físico é estática o que na maioria das vezes acaba
dificultando ao aprendizado deste tema. Neste trabalho, o Campo Magnético poderá ser
visualizado, pelo usuário, com uso de Realidade Virtual ou Realidade Aumentada. O
elemento de estudo será o Campo Magnético que é gerado em um motor elétrico (de indução
monofásico). Pretende-se, por meio desta abordagem, identificar as vantagens de se utilizar as
técnicas de Realidade Virtual e Realidade Aumentada em relação à outras formas de
visualização do campo magnético.<br>Mestre em Ciências
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Janáček, Martin. "Energetické parametry jednofázových asynchronních motorů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242197.
Full textAbstract:
The master's thesis deals and introduces a single-phase inductions machines, the principle of operation, types of design and operating conditions. This thesis includes analysis of individual losses in the machine and reduce the possibility of different ways. After a theoretical proposal for reducing losses are measured by mass-produced single-phase induction machine. Further machine modifications proposed for reducing losses in the stator windings and designed a prototype machine with the adjustment of the magnetic circuit to reduce iron losses made by ATAS elektromotory Nachod a.s. The results are supplemented by a simulation using software Maxwell RMxprt and finite element method (FEM). Finally, they are compared to each machines modifications mainly in terms of energy consumption.
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Pelizari, Ademir. "Um estudo da influência das configurações dos enrolamentos no desempenho de motores de indução monofásicos com capacitor de partida." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-05082009-221845/.
Full textAbstract:
Os motores de indução monofásicos necessitam de dois enrolamentos estatóricos para criação de um campo magnético girante: um enrolamento principal e um enrolamento auxiliar. Este último tem o objetivo de criar um campo girante apenas na partida do motor, desligando-se logo em seguida, através de um interruptor centrífugo acoplado ao eixo do rotor da máquina. O objetivo deste trabalho é avaliar a influência das diferentes configurações de enrolamentos sobre as características externas do motor de indução monofásico. Sendo assim, através desta análise, pretende-se verificar se há algum benefício em seu desempenho. Neste trabalho, duas configurações de enrolamentos foram desenvolvidas e testadas em laboratório. Na primeira configuração, o enrolamento principal foi alocado na parte inferior das ranhuras. Na segunda configuração, as posições dos enrolamentos foram invertidas. As duas configurações de enrolamento foram aplicadas a um protótipo de 0,37 kW, quatro pólos. A simulação foi realizada através de um programa computacional de elementos finitos, possibilitando a extração e análise de resultados, com as densidades de fluxo nas duas configurações. Os resultados dos ensaios realizados no protótipo permitiram analisar o comportamento de grandezas como corrente elétrica, torque, potência e rendimento que são apresentados e comparados no final deste trabalho.<br>The single phase induction motor needs two stator windings to produce the rotating magnetic field: a main winding and an auxiliary winding. The aim of the auxiliary winding is to create the rotating electromagnetic field when the machine is starting and afterwards turned off, generally through a centrifugal switch coupled to the shaft of the machine. The main purpose of this work is to evaluate the influence that the position of the two windings have on the external characteristics of the single phase induction motor. For this purpose, two different kinds of winding configurations were carried out and simulated in a prototype. In the first configuration, the main winding was located in the bottom of the slot. In the second configuration, the positions of the windings were inverted. Performance analysis and computational simulation by Finite Element Method were carried out after the prototype 0.37 kW, four poles was prepared. In this way, through this analysis, improvements on its performance are expected. The electrical quantities such as flux density, electric current, torque, power and efficiency are compared in the end of this document.
23
Vácha, Pavel. "Výpočet jednofázového asynchronního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219186.
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The master´s thesis deal with the thesis of a single-phase induction motor that is more and more used all over the world. Its aim is assembling the information about this type of motor and its calculation. The content of the first part is the theoretical analysis of a single-phase induction motor and acquirement ways of the stroke moment. Than the work contains a project of basic schema of the single-phase induction motor with an auxiliary phase. The practical part is devoted to an elaboration of demonstration example of the single-phase induction motor with concrete parameters calculation, its method was projected before. Than there is practising successived measuring on the motor of the same parameters made firm EMP s.r.o. Slavkov by Brno in this part. In the conclusion there is the evaluation of the whole process with reached results.
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Esuri, Abdulhamid H. "Two-phase inverter/induction motor drive." Thesis, Loughborough University, 1991. https://dspace.lboro.ac.uk/2134/33109.
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Much interest is shown nowadays in the use of variable-speed ac motor drives in applications which previously have been the domain of the de motor supplied from a controlled rectifier or chopper. This interest is due mainly to improvements in semiconductor switching technology and the consequent increased reliability of the de-link inverter, together with the cost-effectiveness and the long-term reliability of ac machines, especially squirrel-cage induction motors. This thesis presents a recently developed form of variable-speed ac motor drive, comprising a 2-phase induction motor fed by a 2-phase inverter. A detailed mathematical model for the drive is developed and this is used to predict the dynamic and steady-state performance of a 300W experimental arrangement under various operating conditions and for both square-wave and sinusoidal PWM modes of operation. The validity and accuracy of the model are confirmed by the close agreement obtained in both shape and value between the experimental and predicted results. The harmonic content of the drive waveforms and the levels of torque and speed pulsations resulting from the inverter supply for both the square-wave and PWM modes of operation are evaluated, and the effects of load-torque and operating frequency variations on the drive performance are also considered. It is concluded in the thesis that this drive arrangement offers the advantages of relative simplicity, high reliability and little maintenance, and can provide a reasonably good performance and efficiency over a wide speed range. Consequently, it is a viable alternative for many variable-speed drive applications.
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Zhang, Yong. "A single-pulse cycloconverter induction motor drive." Thesis, University of Sussex, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260012.
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Evgenije, Adžić. "Регулисани погон асинхроног мотора са минималним бројем сензора". Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2014. http://dx.doi.org/10.2298/NS20131223ADZIC.
Full textAbstract:
У тези су предложена два унапређена алгоритма управљањаасинхроним мотором у условима када је број сензора који се користи упогону минималан. Број сензора који се користи у повратној спрезиуправљачког алгоритма сведен је на само један струјни сензор којимери струју једносмерног међукола погонског инвертора. Предложенеметоде елиминишу карактеристично изобличење реконструисанихфазних струја и постижу бољи квалитет и перформансе управљања уодносу на конвенционалну методу. Сва аналитичка разматрања у тезису праћена одговарајућим експерименталним резултатима, којипотврђују ефикасност предложених метода управљања.<br>U tezi su predložena dva unapređena algoritma upravljanjaasinhronim motorom u uslovima kada je broj senzora koji se koristi upogonu minimalan. Broj senzora koji se koristi u povratnoj spreziupravljačkog algoritma sveden je na samo jedan strujni senzor kojimeri struju jednosmernog međukola pogonskog invertora. Predloženemetode eliminišu karakteristično izobličenje rekonstruisanihfaznih struja i postižu bolji kvalitet i performanse upravljanja uodnosu na konvencionalnu metodu. Sva analitička razmatranja u tezisu praćena odgovarajućim eksperimentalnim rezultatima, kojipotvrđuju efikasnost predloženih metoda upravljanja.<br>This thesis proposes two improved and robust induction motor drive controlmethods, in the case when there is a minimal number of sensors forproviding feedback signals. Number of used sensors is reduced to only onecurrent sensor measuring the inverter dc-link current. Proposed methodscancels offset jitter-like waveform distortion present in the reconstructedmotor phase currents, and achieves higher quality and drive performanceregard to conventional current reconstruction mechanism. Effectivness of theproposed methods are verified on developed HIL (hardware-in-the-loop)platform and laboratory induction motor drive prototype.
27
Wong, D. "Speed control of three-phase induction motors." Thesis, University of Reading, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376194.
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Zheng, Libo. "Analysis and control of five-phase induction motor drives." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501695.
Full textAbstract:
Analysis and control of five-phase induction motor drives are investigated in this thesis. A vector model for five-phase induction motors is derived. Two distinct aspects related to multi-phase induction motor modelling are revealed and determination of the equivalent circuit parameters is explained from theoretical and experimental viewpoints. Modulation techniques for the five-phase voltage source inverter are developed, with both separate and simultaneous space excitation included. The analysis of five-phase induction motor drives is verified using a practical test rig. Indirect vector control applied to the first and third space harmonics, with separate excitation and simultaneous excitation, are experimentally assessed.
29
Rajamani, Haile-Selassie. "High speed, three-phase induction motor drives for domestic appliances." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627054.
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Kneebone, Nigel J. "Efficiency and speed control of three-phase induction motors." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277167.
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Garcia, Saulo Crnkowise. "Aplicações de controle vetorial e análise da robustez em motores de indução trifásicos com atraso no controle /." Ilha Solteira, 2018. http://hdl.handle.net/11449/166414.
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Orientador: Falcondes José Mendes de Seixas<br>Resumo: O foco principal deste trabalho é a investigação de métodos de controle capazes de rejeitar perturbações, incertezas e influências degenerativas do atraso no problema referente ao controle vetorial por campo orientado do Motor de Indução Trifásico (MIT), através de um modelo matemático não linear deste. Dá-se ênfase à utilização do método de controle Proporcional-Integral em conjunto com o Controle com Estrutura Variável e Modos Deslizantes, sendo que este tem como principal característica a rejeição de perturbações e incertezas. São realizadas análises da robustez da estabilidade e também das influências que as incertezas e atrasos exercem sobre o comportamento dinâmico deste sistema. Para corroborar com as análises, são feitas simulações utilizando exemplos numéricos num sistema linear de ordem dois e aplicações no MIT através de um modelo matemático não linear.<br>Abstract: This work deals the investigation of control methods capable of rejecting perturbations, uncertainties and degenerative influence of input time-delay in the Three-phase Induction Motor (TIM) vector control problem, through a nonlinear mathematical model. The main focus is the use of the Proportional-Integral control method in conjunction with the Variable Structure Control with Sliding Mode, which has as main characteristic the rejection of perturbations and uncertainties. Analyzes are performed on the stability robustness and also on the influence that the uncertainties and input time-delay on the dynamic behavior of this system. In order to corroborate with the analyzes simulations are made using numerical examples of two-order linear system and applications in a non-linear mathematical model of a Three-phase Induction Motor.<br>Doutor
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Dinu, Andrei. "FPGA neural controller for three-phase sensorless induction motor drive systems." Thesis, De Montfort University, 2000. http://hdl.handle.net/2086/4132.
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Alolah, A. I. "Microprocessor controlled three-phase inverter for variable-speed induction motor drive." Thesis, University of Bradford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371466.
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Bawana, Niyem Mawenbe. "Thermal Response in a Field Oriented Controlled Three-phase Induction Motor." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7740.
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The research conducted at the department of Electrical Engineering of the University of South Florida campus in Tampa only covers the electrical aspect of electric drives. However, the performance of electric machinery is significantly impacted by temperature variation. The
literature review shows three main control techniques in use today in electric drives namely, Scalar control, Direct Torque control and Field Oriented control.
This thesis presents a temperature rise of rotor bars, stator winding, stator core and stator frame in a running three phase field-oriented controlled induction machine. A literature search shows that none of research has been carried out to investigate a thermal response of a field-oriented controlled induction motor. With this motivation, we were able to implement a lumped parameters thermal model of a three-phase field-oriented IM in MATLAB Simulink, which allows us to determine that rotor bars have the highest temperatures rising to 84 degrees Celsius. This confirms that rotors bars are the hottest part of a running IM as stipulated in literature.
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Patel, Sagarkumar. "Speed Control of Three-Phase Induction Motor Using Variable Frequency Drive." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10690223.
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<p>There are various methods for speed control of induction motors. This paper specifically describes one of the methods: speed control using variable frequency. The proposed system is a MATLAB simulink model, which is a closed loop model designed to achieve desired speed control of a three-phase induction motor by varying its frequency. The simulink model has four main blocks, namely the inverter, synchronous machine, proportional integral control and current hysteresis control. For accuracy of output results and simplicity, we have used dq to abc transformation block and sin function block. The inverter is comprised of six integrated gate bipolar transistors (IGBTs), which are fired by gate pulses generated by current hysteresis control block. The inverter generates variable frequency and variable voltage output, which is given to motor terminals. The project presents the working principle of variable frequency drive (VFD), its performance, and the use of Pulse Width Modulation (PWM) in a three-phase inverter to control the frequency and thus the speed. The proposed method conformed to performance predictions and delivered the desired outputs.
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XIE, MING-KUN, and 謝明坤. "On the control of single-phase induction motor." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/44025559762042821631.
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Chen, Chang-Sung, and 陳蒼松. "Computer Aided Design of Single-Phase Induction Motor." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/65600609417802672948.
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碩士<br>國立海洋大學<br>電機工程學系<br>86<br>The computer has been applied to the design of electric
apparatus for many years.In Taiwan,most of the computeraided
design programs applied in the area of low-power electric
machines such as single-phase induction motorare still working
on Dos system.The main purpose of thisthesis is to develop a
program that based on the personalcomputer(PC) under the
environment of the populer operatingsystem,Microsoft Window95.
This program,named Single-PhaseInduction Motor Design(SPIMD),is
implemented by using theprogramming language of Visual Basic(
Professional Edition).SPIMD performs data automatic processing
ability,especiallyin wired code,table,curves,and iteration
procedure.Besidesthe preceding function,SPIMD offer various
other services,for example copious empirical data of single-
phase inductionmotor design.The program package affords to
improve the designand analysis efficiency is expected.
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Chen, Tsu-Kung, and 陳賜恭. "Analyses of Single-Phase Induction Generators and Single-Phase Induction Motors." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/4n85uz.
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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>90<br>This thesis investigates the important performance of a single-phase, 110/220-V, 4-pole, 1/3-hp induction machine under two different operation modes, i.e., a single-phase induction motor (SPIM) mode and an isolated single-phase self-excited induction generator (SPSEIG) mode.
In SPIM mode, the FLUX2D simulated software, which is widely employed for analyzing flux, heat, and transient characteristics, and the d-q axis SPIM equivalent-circuit model are both utilized to simulate the characteristics of a SPIM. The experimental results are compared with the simulated results obtained from both FLUX2D and q-d axis model to validate the performance of the studied machine under different operating conditions.
In SPSEIG mode, both eigenvalue and eigenvalue sensitivity techniques are employed to determine required minimum excitation capacitance. The steady-state equivalent-circuit of a SPSEIG is used to obtain the relationship between main-winding current and magnetizing reactance. The simulated results based on a d-q axis equivalent-circuit SPSEIG model are also compared with the experimental results under different operating conditions.
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Huang, Wun-Liang, and 黃文良. "Analysis of Adjustable-Speed Single-Phase Induction Motor Using Phase-Controller." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/39188097808808891603.
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碩士<br>崑山科技大學<br>電子工程研究所<br>100<br>Small single-phase induction motor(SIPM) has been widely used in household appliances such as electric fans, air-conditioning units. The most common used speed control method is with mechanical switch combined with coil connections such as external transform or internal windings connection. This is based on cost considerations. Further control method uses phase control or variable voltage variable frequency (VVVF) control, respectively. The main issue of this paper is to explore the power components and efficiency of the phase-control speed process.
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Lettenmaier, Terrance Michael. "Single phase induction motor with an electronically controlled capacitor." 1986. http://catalog.hathitrust.org/api/volumes/oclc/15020767.html.
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Thesis (M.S.)--University of Wisconsin--Madison, 1986.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf 107).
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Chis, Lucian. "Testing and modeling of the single-phase Written-Pole Motor." Thesis, 1998. http://hdl.handle.net/1957/33457.
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A relatively new development in the electric machines field has been the written-pole technology, of which the latest product is the large single-phase electric motor, the single phase Written-Pole Motor (WPM). The WPM is a synchronous, permanent-magnet single-phase motor having a weak rotor cage for start-up which in addition exhibits significant hysteresis effects at speeds below or above true synchronism. The electrical configuration of the WPM places it in the capacitor-start capacitor-run category of single-phase motors, due to the large size and need for an approximation of a round rather than elliptic rotating magnetic field.
This thesis presents the results of the research conducted by the author in the Motor Systems Resource Facility (MSRF) of the Electrical and Computer Engineering Department at Oregon State University. The thesis is structured into two main parts: Testing and Modeling.
The tests conducted on the WPM were trying to independently verify manufacturer's claims with regards to efficiency, power factor, robustness, power-outage ride-through and furthermore to study the behaviour of the machine during voltage sags, overvoltages and undervoltages. Tests were conducting in order to develop a
mathematical model from which the performance of the machine can be predicted.
The modeling efforts were concentrated in the development of a comprehensive model which would include all three major aspects of the WPM, and the performance of the resulting model was compared with the sampled data.<br>Graduation date: 1999
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Wang, Shih-Wei, and 王士維. "Study of Single Phase Induction Motor with Maximum Starting Torque." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/62162083460450016379.
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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>94<br>For low speed application, the gear box is used to reduce the speed of the single phase induction motor, but it will produce noise and reduce reliability. Therefore, the variable-frequency method to diminish speed was developed in field application. The main advantages of this method can reduce the noise of the gear box and increase the reliability. However the single phase induction motor can not maintain original starting torque under variable-frequency. In this thesis, the optimum capacitance was evaluated based on the double revolving-field theory ( DRFT ).And, up-voltage that does not influence the current specification of the machine are used to promote starting torque at low frequency. Simulation results indicate that the starting torque of variable- frequency method is higher than that of nominal frequency. The operation requirement of low speed and high starting torque is also conformed.
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Law, Joseph Daniel. "A single phase induction motor voltage controller with improved performance." 1985. http://catalog.hathitrust.org/api/volumes/oclc/12532391.html.
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Thesis (M.S.)--University of Wisconsin--Madison, 1985.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf 88).
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Hxiao, Yuting, and 蕭煜庭. "Dynamic Braking of a Voltage Supplied for Single Phase Induction Motor." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/48366843744876709401.
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碩士<br>大葉大學<br>工學院碩士在職專班<br>99<br>ABSTRACT
DC injection braking systems provide a simple, rapid and reliable solution as they are incorporated within the control function and utilize the existing motor drive. The main purpose of this paper is to design a DC injection braking system for a single –phase induction motor drive. First, the single phase induction was designed through finite element method. Simulation results, including flux lines, flux density and magnetic field distribution. The designed DC injection braking modules utilize Programmable logic controller, transformer, rectifier and magnetic contacts to switch the injected DC current into the motor windings. DC injection braking can provide the motor braking force during stop when AC power is removed from the motor. DC magnetic field introduced into the stator will create a powerful braking force on the spinning rotor. This DC injection current may be increased to provide more braking torque from the single induction motor. Experimental results show that the DC injection is an effective braking method for the single-phase induction motor can also be applicable in the case of the three -phase induction motor.
Keywords: dc injection braking, finite element method, single-phase induction motor, dynamic braking
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Ou, Wu-Chau, and 歐武超. "The Run Capacitor in Single-Phase Induction Motor to Efficiency Influence." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/71661060647431760708.
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碩士<br>和春技術學院<br>電機工程研究所<br>96<br>This thesis is mainly for the analysis of permanent split-capacitor motor of single-phase induction motor (SPIM) to Efficiency Influence. This thesis is based on the test of alternating current 220V, 150 watt, 2 pole's motor, adopted with different capacitance value of the different running capacity, and comparative analyze the biggest torque magnitude of current and the efficiency value. the result is, the capacitance value and the current value assume the positive correlation, presents the non- positive correlation with the efficiency, the torque. So the running capacitor of permanent split-capacitor motor changes capacitance value, and the current also. But the efficiency is a non- positive correlation along with the capacitance value. Accordingly, selecting the proper running capacitor value and capacitance value of run capacity is a very important issue for single-phase induction motor’s efficiency. Hope through the study, we can have further understanding toward the effects of running capacitor capacitance value brings to single-phase induction motor’s performance.
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Wu, Hann-Chung, and 吳漢忠. "The Research on Efficiency Improvement for a Single-Phase Induction Motor." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/71314842375216622828.
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碩士<br>國立臺灣科技大學<br>電機工程研究所<br>84<br>This thesis proposes a new power electronic technology to
improve the starting torque and operating efficiency of a
single phase induction motor drive system by adjusting its
effective capacitance. The maximum torque and
efficinecy improvement of the motor are achieved by
adjusting the shorting interval of the solid-state device,
which is paralleled with the running capacitor.The control
algorithm and the shorting interval of the solid-state
device are executed by a digital processor,TMS320 C40,Some
simple hardware circuits are designed.Several experimental
results are validated with the simulated wave forms.
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Chen, Ming-Yeong, and 陳明勇. "OPERATING PERFORMANCE IMPROVEMENT OF A SINGLE-PHASE INDUCTION MOTOR VIA SWITCHING CONTROL." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/57193418728938301028.
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碩士<br>國立清華大學<br>電機工程學系<br>85<br>The major purpose of this thesis is to study the operating
per- formance of a single-phase induction motor by switching
controlling its auxiliary winding current. First, the
governed equations, equi- valent circuits and steady-state
operating characteristics of a single-phase induction motor
are derived and simulated. Then accordingly, the
intelligent switching control strategy is developed. In the
proposed switching controlled single-phase induction motor,
while the main winding is permenantly connected accross the AC
grid, its auxiliary winding is fed by a current-controlled
switching mode inverter. The phase of auxiliary winding
current is kept in quadra- ture with those of main winding,
but its magnitude is independently controlled by the current-
controlled inverter. At starting, within the current ratings
of system components, the starting torque can be directly
controlled to meet the load requirements. On the other hand,
the magnitude of auxiliary winding current is regulated toward
the condition of minimum input power at running case using the
pro- posed intelligent switching controller. Although the
actual ampere- turn balanced can not be achieved
simultaneously at this condition, the pulsating torque is
neglighly small and thus the mechanical run- ning
characteristic can also be improved. For further improving the
line drawn current quality, a power factor correction switching
con- troller, which is located at the ac source side, is also
implemented in the thesis. Through which, the line drawn
curent is regulated to be low-distorted, and the power factor
is much improved. The proposed switching-controlled single-
phase induction motor has the adventages that the starting and
running capacitors, the centrifugal switch and the motor
parameters are not needed. The overall performance improve-
ment of the single-phase induction motor via the proposed
controlled stratgies are demonstrated experimentally.
48
汪丕杰. "The research of switched capacitance control for a single-phase induction motor." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/62105812015915266528.
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Chieh, Wang Pi, and 汪丕杰. "The Research of Switched Capacitance Control for a Single-Phase Induction Motor." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/82072258476460656287.
Full textAbstract:
碩士<br>國立臺灣科技大學<br>工程技術研究所<br>81<br>This thesis present a new method which adjusted an ac capacitor
by using an electronic switch in parallel with a capacitor for
a single phase induction motor.the capacitor is shorted during
each cycle to vary the effective value of the ac capacitor.By
this method,a good performance can be obtined using only one
capacitor for both starting and running condition.Two new
optimization algorithms to obtain maximum starting torque by
adjusting the effective capacitance during starting is prposed.
No running capacitor or centrifugal switch is used here. A
similar performance of starting of the induction motor can be
obtained when compared with the conventional method of using
two capacitors,A theoretical analysis,simulation and
experimental results are presented in this thesis.
50
"Modeling of Air-Conditioner Compressor Single Phase Induction Motor for Transient Analysis." Master's thesis, 2012. http://hdl.handle.net/2286/R.I.15842.
Full textAbstract:
abstract: This thesis presents a new technique to develop an air-conditioner (A/C) compressor single phase induction motor model for use in an electro-magnetic transient program (EMTP) simulation tool. The method developed also has the capability to represent multiple units of the component in a specific three-phase distribution feeder and investigate the phenomenon of fault-induced delayed voltage recovery (FIDVR) and the cause of motor stalling. The system of differential equations representing the single phase induction motor model is developed and formulated. Implicit backward Euler method is applied to numerically integrate the stator currents that are to be drawn from the electric network. The angular position dependency of the rotor shaft is retained in the inductance matrix associated with the model to accurately capture the dynamics of the motor loads. The equivalent circuit of the new model is interfaced with the electric network in the EMTP. The dynamic response of the motor when subjected to faults at different points on voltage waveform has been studied using the EMTP simulator. The mechanism and the impacts of motor stalling need to be explored with multiple units of the detailed model connected to a realistic three-phase distribution system. The model developed can be utilized to assess and improve the product design of compressor motors by air-conditioner manufacturers. Another critical application of the model would be to examine the impacts of asymmetric transmission faults on distribution systems to investigate and develop mitigation measures for the FIDVR problem.<br>Dissertation/Thesis<br>M.S. Electrical Engineering 2012