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Dissertations / Theses on the topic 'Hysteresis motor'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Truong, Cang Kim 1979. "Analysis of hunting in Synchronous Hysteresis Motor." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/18011.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.<br>Includes bibliographical references (leaf 86).<br>The Synchronous Hysteresis Motor has an inherent instability when it is used to drive a gyroscope wheel. The motor ideally should spin at a constant angular velocity, but it instead sporadically oscillates about synchronous speed. This phenomenon is known as 'hunting'. This problem produces current ripples at the motor's electrical terminals and induces noise on the sensors that monitor gyro activity. This thesis examines the

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2

Bayless, Jacob D. (Jacob Daniel). "A high-speed hysteresis motor spindle for machining applications." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/87955.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.<br>Cataloged from PDF version of thesis. "February 2014."<br>Includes bibliographical references (pages 43).<br>An analysis of suitable drive technologies for use in a new high-speed machining spindle was performed to determine critical research areas. The focus is on a hysteresis motor topology using a solid, inherently-balanced D2 steel shaft. An analytical model of the motor is devised in order to make performance predictions and optimization, and an experimental apparatus is constructed in orde

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3

Zhou, Lei Ph D. Massachusetts Institute of Technology. "Magnetically levitated hysteresis motor driven linear stage for in-vacuum transportation tasks." Thesis, Massachusetts Institute of Technology, 2019. https://dspace.mit.edu/handle/1721.1/122142.

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This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 241-246).<br>This thesis presents a new in-vacuum reticle transportation mechanism for extreme ultraviolet (EUV) photolithography machines. In the photolithography process, the reticle is a quartz plate that contains a pattern of the integrated circuit, which needs

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4

Chen, Hanling. "AVERAGE-VALUE MODELING OF HYSTERESIS CURRENT CONTROL IN POWER ELECTRONICS." UKnowledge, 2015. http://uknowledge.uky.edu/ece_etds/78.

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Hysteresis current control has been widely used in power electronics with the advantages of fast dynamic response under parameter, line and load variation and ensured stability. However, a main disadvantage of hysteresis current control is the uncertain and varying switching frequency which makes it difficult to form an average-value model. The changing switching frequency and unspecified switching duty cycle make conventional average-value models based on PWM control difficult to apply directly to converters that are controlled by hysteresis current control. In this work, a new method for ave

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5

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 conditi

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6

Brasão, Leandro Cândido. "Acionamento do motor de corrente contínua a ímãs permanentes sem escovas utilizando estratégia a quatro chaves." Universidade Federal de Uberlândia, 2012. https://repositorio.ufu.br/handle/123456789/14497.

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Fundação de Amparo a Pesquisa do Estado de Minas Gerais<br>Permanent magnet motors possess high efficiency and can be commercially competitive. The main purpose of this paper is to describe a low cost four-switch brushless dc motor drive with compensated direct current controlled our compensated hysteresis strategy. The description of the mathematical model is used in the computational simulation models to four-switch and six-switch. These results are here compared in an experimental model of drive, where the six-switch PWM drive and hysteresis drive is compared to the four-switch hysteresis c

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7

Comsa, Adrian Florin. "Contribution à l'optimisation de la commande par hystérésis du moteur synchrone à aimants permanents." Vandoeuvre-les-Nancy, INPL, 1997. http://www.theses.fr/1997INPL053N.

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La méthode de commande par hystérésis des courants est très utilisée : simple et robuste, elle ne nécessite pas la connaissance exacte des paramètres internes de la machine. Son désavantage est une fréquence de hachage variable qui entraine des ondulations du couple. Notre travail a consiste à en améliorer les performances au moyen de deux techniques : - la méthode de l'hystérésis modulée, qui sert à imposer lors du contrôle par hystérésis des courants, la fréquence de hachage des transistors de l'onduleur, - le contrôle par hystérésis du vecteur courant statorique, désigné par ses composantes

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8

Cester, Christophe. "Étude des pertes magnétiques supplémentaires dans les machines asynchrones alimentées par onduleur à modulation de largeur d'impulsion." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0068.

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La banalisation de l'emploi d'onduleras à Modulation de Largeur d'Impulsion pour l'alimentation des machines asynchrones rend indispensable l'étude des pertes magnétiques supplémentaires qu'ils engendrent. L'influence des paramètres principaux de la MLI, fréquence de hachage et paramètre de modulation est étudiée, grâce à un banc de mesure de type cadre Epstein spécialement adapté. L'emploi d'un moteur instrumenté de 4 kW permet d'observer les formes d'ondes réellement présentes dans les différentes parties du circuit magnétique et de montrer que la déformation du signal MLI entraîne une forte

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9

Frias, Anthony. "Minimisation des pertes fer des machines électriques de traction par la modélisation et l'optimisation." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT028/document.

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Le coût, l'autonomie et la durée de vie sont les principaux aspects qui freine le public dans l'achat d'une voiture électrique. Tous ces aspects sont liés à la batterie qui ne permet de stocker qu'une quantité limitée d'énergie. Dans ces conditions, il est indispensable de maîtriser les pertes d'énergie de la chaîne de traction. La machine électrique étant le principal consommateur d'énergie, elle joue un rôle important dans l'efficacité énergétique globale. Dans ce contexte, comment réduire les pertes de la machine électrique pour la rendre plus efficace ? Pour répondre à cette question, l'ob

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10

White, Terence H. "A three-phase hybrid dc-ac inverter system utilizing hysteresis control." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FWhite%5FTerence.pdf.

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11

Bulín, Tomáš. "Analýza ztrát v elektrických strojích při nestandardních podmínkách." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-408013.

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This thesis deals with the analysis of magnetic losses in electrical machines and the possibilities of their measurement. Magnetically soft and hard materials are very prone to changing magnetic properties. They can be changed simply by changing the temperature of the material or different stresses induced in the material, resulting in different results. These changes are important to keep in mind when an electric machine is being designed. The original parameters of the affected materials can be restored by annealing or grinding. These methods release the induced stresses within the material.

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12

Plíšek, Oldřich. "Analýza ztrát v železe malého asynchronního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-376984.

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The aim of this master´s thesis is to analyze core losses of a small induction motor. Analyzed values are obtained from laboratory measurements, software analysis and 2D finite element method simulation. The theoretical part of this thesis consists of two parts. The analysis of the higher spatial harmonics presents in the induction motor and the analysis of core losses of the motor. Practical part consists of laboratory measurements according to ČSN. Measured values are used to calculate individual losses. The next part consists of creating a model for software analysis (Maxwell RMxprt). The g

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13

Dogantimur, Erkan, and Daniel Johnsson. "Analysis of Accuracy for Engine and Gearbox Sensors." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388346.

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This thesis provides a standardized method to measure accuracy for engine and gearbox sensors. Accuracy is defined by ISO 5725, which states that trueness and precision need to be known to provide a metric for accuracy. However, obtaining and processing the data required for this is not straight forward. In this thesis, a method is presented that consists of two main parts: data acquisition and data analysis. The data acquisition part shows how to connect all of the equipment used and how to sample and store all the raw data from the sensors. The data analysis part shows how to process that ra

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14

Halfar, Tomáš. "Zlepšení energetických parametrů asynchronních strojů malého výkonu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219929.

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The master’s thesis Improvement power parameter of small induction motors deals with issues of lowering the losses of small induction motors. The first part introduces with design and principles of operation of induction motors. Also introduces to theoretical problematic of losses, their lowering and measuring. In the practical part there are results of the measuring the losses in the induction motor ATAS Elektromotory Náchod a.s. T22VT512 (71-0512). There are proposed methods of increasing the efficiency of induction motor due to measuring and their verification in the Maxwell software. The l

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15

Hsieh, Ying-Cheng, and 謝英成. "Adjustable Hysteresis Current Control Scheme for Induction Motor Drive." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/33810276516938647117.

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碩士<br>中華科技大學<br>機電光工程研究所碩士班<br>101<br>Abstract The traditional six-switch three-phase (6S3Ph) inverter is used to variable speed drive for AC motors and uninterruptible power systems over the years. However, The current control method in power electronic circuits play an important role, especially the PWM(Pulse Width Modulation) converter is widely used in AC motor drives and continuous AC power supply. The conventional methods including triangular wave or space-vector-based chopper control or hysteresis control, rather the former is a fixed switching frequency, the latter is a variables witc

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16

Chiang, Ming-Che, and 江明哲. "Energy Efficiency-Improved Hysteresis Current Controllers Design for Induction Motor Drives." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/41894366043945445630.

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碩士<br>國立東華大學<br>電機工程學系<br>102<br>In general, hysteresis current control on voltage-fed inverters is a simple and effective control method for AC motor drives. This is because the control method can give a good and fast transient response of the 3-phase currents. However, the drawbacks of the variable switching frequency and high-frequency harmonic are usually introduced in the motor drives. In this thesis, an adaptive hysteresis current control method for indirect field-oriented induction motor drive is presented. In the adaptive hysteresis current control, the hysteresis band is adaptively tu

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17

KO, BO-YU, and 柯柏羽. "Examination of the Hysteresis Due to Friction in a DC Motor." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/6ajkpd.

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碩士<br>南臺科技大學<br>機械工程系<br>105<br>This study explores the hysteresis of a DC motor caused by friction during the pre-sliding phase. In the past, the experiments of the hysteresis of DC motors used to have the triangular waveform as the input rather than the sinusoidal waveform commonly used in the hysteresis experiments of ferromagnetic materials. It is the aim of this study to examine the hysteresis phenomenon under sinusoidal input. LabVIEW is used in programming to generate 10 sinusoidal cycles and output via a DAQ card. They are used to generate the desired electromagnetic torque in a DC mot

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18

Bo-HengChen and 陳伯恒. "Design of Adjustable Hysteresis Direct Torque Control for Interior Permanent Magnet Motor." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/s7x5a5.

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19

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

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

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20

Ramchand, Rijil. "Investigations On Boundary Selection For Switching Frequency Variation Control Of Current Error Space Phasor Based Hysteresis Controllers For Inverter Fed IM Drives." Thesis, 2010. http://etd.iisc.ernet.in/handle/2005/1330.

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Current-Controlled Pulse Width Modulated (CC-PWM) Voltage Source Inverters (VSIs) are extensively employed in high performance drives (HPD) because of the considerable advantages offered by them, such as, excellent dynamic response and inherent over-current protection, as compared to the voltage-controlled PWM (VC-PWM) VSIs. Amongst the different types of CC-PWM techniques, hysteresis current controllers offer significant simplicity in implementation. However, conventional type of hysteresis controllers (with independent comparators) suffers from some well-known drawbacks, such as, limit cycle

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21

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

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

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22

Ramubhai, Patel Chintanbhai. "Investigations On Sensorless Vector Control Using Current Error Space Phasor And Direct Torque Control Of Induction Motor Drive Based On Hexagonal And 12-Sided Polygonal Voltage Space Vectors." Thesis, 2011. http://etd.iisc.ernet.in/handle/2005/2180.

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Variable-speed Induction motor drives are nowadays used for various kinds of industrial processes, transportation systems, wind turbines and household appliances in the world. The majority of drives are for general purpose speed control applications where accurate speed control is not required for entire speed range. But for high dynamic drive application, very precise and fast control of induction motor drive is essential. For such applications, sophisticated and well-performing control design is a key issue. Precise and accurate torque control of the Induction Motor (IM) can only be accompli

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23

Vasconcelos, Fábio Dinarte Fernandes. "Projeto de uma mota elétrica." Master's thesis, 2019. http://hdl.handle.net/10400.13/2603.

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Com o passar dos anos tem-se verificado o crescente consumo de combustíveis fósseis no sector dos transportes e o consequente aumento dos níveis de poluição atmosférica e diminuição das suas reservas. Uma das soluções para estes problemas, é a utilização de veículos elétricos, visto que são “amigos do ambiente”, podendo regenerar a sua energia através de energias renováveis. Face aos problemas citados anteriormente, este projeto consiste na conversão de uma mota com motor a combustão interna para uma mota elétrica. Para este projeto, selecionou-se um motor de corrente contínua de ímanes pe

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24

Bothma, Paul Ronald. "Die optimering van die ontwerp en die elektroniese kommutasie van 'n histeresemasjien vir hoë rotasiesnelhede." Thesis, 2014. http://hdl.handle.net/10210/11172.

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M.Ing. (Electrical & Electronic Engineering Science)<br>This dissertation deals with the design and implementation of a hysteresis machine for high-speed applications. A model is introduced whereby the optimum working point of the machine can be determined. Hence it is possible to make a comparison between different rotor materials with respect to cost, specific energies and overall performance. The development of a compensator for actively controlling the phase angle of the airgap flux density, in order to reduce hunting, is discussed with reference to practical results. A technique for measu

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