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Dissertations / Theses on the topic 'HYSTERESIS CURRENT'

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Published: 11 September 2023

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1

Sulkin, Daniel Paul. "Hysteresis in the Current Recession: Evidence and Consequences." Thesis, Boston College, 2012. http://hdl.handle.net/2345/2643.

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Thesis advisor: Robert Murphy<br>Hysteresis, in an economic context, is the idea that periods when the unemployment rate is greater than the natural rate have the effect of raising the underlying natural rate of unemployment (or, non-accelerating inflation rate of unemployment, NAIRU) and moving it to a new higher equilibrium state. The existence of hysteresis is still a matter of dispute in modern economics.This study examines the economic and employment situation from 1980 to the present and in particular since the beginning of the most recent recession in December 2007 and demonstrates that
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2

Liu, Yingying. "Multifrequency Averaging of Hysteresis-Current-Controlled DC-DC Converters." UKnowledge, 2015. http://uknowledge.uky.edu/ece_etds/67.

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Multifrequency averaging is one of the widely used modeling and simulation techniques today for the analysis and design of power electronic systems. This technique is capable of providing the average behavior as well as the ripple behavior of power electronic systems. Hysteresis current control has fast response and internal current stability through controlling switches to maintain the current within a given hysteresis band of a given current command. However the state space variables in a hysteresis controlled system cannot be directly approached by multifrequency averaging method because of
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3

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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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

Wu, Zhengqiu. "Nonlinear modelling of three phase multi limb transformers." Thesis, London South Bank University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245156.

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6

RANJAN, SHILPA. "MINIMISATION OF TORQUE RIPPLE OF HYSTERESIS CURRENT CONTROLLED PMSM USING PI-RES CONTROLLER." Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2021. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18871.

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For the better dynamic performance of PMSM & minimum ripples in torque field oriented control (FOC) is implemented. Some intricate methods are applied for controlling & for the better performance of permanent magnet synchronous machine. For highly performed motor drives flux estimation is always important. The rotor flux estimation model is designed using high pass filter (HPF) to solve the problem caused due to integrator applied in the flux estimation. Also phase locked loop (PLL) is introduced in the model. It is known PMSM is used wherever smooth torque is required. But because of s
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7

Najafi, M., F. Hayati, and A. Rafati. "Effect of Current Frequency and Annealing on Magnetic Properties of [Co70Fe30]97Sn3 Nanowire Arrays." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35351.

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[Co70Fe30]97Sn3 alloy nanowire arrays have been fabricated by alternative current (ac) electrodeposition of Co2+, Fe2+ and Sn2+ into anodic aluminum oxide (AAO) templates. The samples were deposited at current frequency 50, 100, 200, 300, 400, 500, 800 and 1000 Hz, respectively. The structure and magnetic properties of [Co70Fe30]97Sn3 nanowire arrays dependence on different current frequency were analyzed by XRD and alternating gradient field magnetometer (AGFM). The X-ray diffraction patterns are shown an amorphous structure of the[Co70Fe30]97Sn3 nanowires. When you are citing the docume
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8

Block-Schachter, David. "Hysteresis and urban rail : the effects of past urban rail on current residential and travel choices." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/73697.

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Thesis (Ph. D. in Transportation)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (p. 265-284).<br>Cities are endowed with and accumulate assets based on their unique histories, which in turn define the choice set of the present. These assets range from the natural-sheltered ports, fertile land--to the cons
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9

Lee, Heejae. "Analysis of Current-Voltage Hysteresis and Ageing Characteristics for CH3NH3PbI3-xClxBased Perovskite Thin Film Solar Cells." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX009/document.

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Les perovskites organiques-inorganiques en halogénures de plomb sont des matériaux très prometteurs pour la prochaine génération de cellules solaires avec des avantages intrinsèques tels que leur faible coût de fabrication (grande disponibilité des matériaux de base et leur mise en œuvre à basse température) et leur bon rendement de conversion photovoltaïque. Cependant, les cellules solaires pérovskites sont encore instables et montrent des effets d'hystérésis courant-tension délétères. Dans cette thèse, des résultats de l’analyse physique de couches minces de pérovskite a
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10

Rezeq, Mohammed (Moh'd). "Investigation of magnetothermal and critical current hysteresis in polycrystals of low and high T(c) type II superconductors." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6371.

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The model of Clem and Hao and others is extended to account for the enhancement of the Meissner effect observed in single crystals of hysteretic type II superconductors upon thermal cycling below Tc in static applied magnetic fields. Predictions are made about the features of the final closed thermal hysteretis loop achievable by extensive cycling and their dependence on the temperature limits T1 and T2 &lt; Tc chosen for the cycles. A large variety of observations, by several workers, of a narrow peak of enhanced Meissner effect near Tc in polycrystalline type II superconductors upon slow war
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11

Baktiono, Surya. "A Study of Field-Oriented Control of a Permanent Magnet Synchronous Generator and Hysteresis Current Control for Wind Turbine Application." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338314559.

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12

Moura, Walterley Araujo. "Determinação da polarização ferroelétrica do PVDF estirado biaxialmente utilizando a técnica de corrente constante." Universidade de São Paulo, 1998. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-19052009-102253/.

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Foi desenvolvido um novo método para a determinação da polarização ferroelétrica de polímeros ferroelétricos, em particular do PVDF estirado biaxialmente. A técnica consiste em manter constante a corrente através da amostra e medir a evolução da tensão (V versus t) entre os eletrodos da mesma. As medidas foram realizadas em ambiente com atmosfera de ar superseco o que permite desprezar a condução elétrica das amostras, simplificando sobremaneira as equações do problema. Considera-se a existência de dois tipos de polarização: a ferroelétrica, com tempo de chavamento desprezível, e uma polarizaç
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13

Ozkaya, Hasan. "Parallel Active Filter Design, Control, And Implementation." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608438/index.pdf.

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The parallel active filter (PAF) is the modern solution for harmonic current mitigation and reactive power compensation of nonlinear loads. This thesis is dedicated to detailed analysis, design, control, and implementation of a PAF for a 3- phase 3-wire rectifier load. Specifically, the current regulator and switching ripple filter (SRF) are thoroughly investigated. A novel discrete time hysteresis current regulator with multi-rate current sampling and flexible PWM output, DHCR3, is proposed. DHCR3 exhibits a high bandwidth while limiting the maximum switching frequency for thermal stability a
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14

Lengvinas, Danius. "Elektros energijos apskaitos prietaisų charakteristikų tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100618_135329-87271.

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Šio darbo tyrimo tikslas – ištirti elektros energijos apskaitos prietaisų, indukcinių ir elektroninių, charakteristikas. Buvo atlikta informacijos šaltinių analizė apie indukcinių ir elektroninių elektros energijos skaitiklių ir srovės matavimo transformatorių parametrus, apsprendžiančius jų charakteristikas. Remiantis informacijos šaltinių apibendrinimu suformuota hipotezė: ne visos elektroninių elektros energijos prietaisų charakteristikos geresnės už indukcinių elektros energijos apskaitos prietaisų charakteristikas. Suformuoti tyrimo uždaviniai: ištirti elektroninių ir indukcinių elektros
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15

Ingram, David. "An Evaluation of Harmonic Isolation Techniques for Three Phase Active Filtering." Thesis, University of Canterbury. Electrical and Computer Engineering, 1998. http://hdl.handle.net/10092/1260.

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Recent advances in power electronics have lead to the wide spread adoption of advanced power supplies and energy efficient devices. This has lead to increased levels of harmonic currents in power systems, degrading the performance of electrical machinery and interfering with telecommunication services. Active filters provide a solution to these problems by compensating for the distorted currents drawn by non-linear loads. Optimal methods for controlling these active filters have been determined by computer simulation and experimental implementation. Methods used for isolating the harmonic cont
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16

Mousavi, Seyedali. "Electromagnetic Modelling of Power Transformers for Study and Mitigation of Effects of GICs." Doctoral thesis, KTH, Elektroteknisk teori och konstruktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-159747.

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Geomagnetic disturbances that result from solar activities can affect technological systems such as power networks. They may cause DC currents in power networks and saturation of the core in power transformers that leads to destruction in the transformer performance. This phenomena result in unwanted influences on power transformers and the power system. Very asymmetric magnetization current, increasing losses and creation of hot spots in the core, in the windings, and the metallic structural parts are adverse effects that occur in transformers. Also, increasing demand of reactive power and ma
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17

Long, Fei. "Three-Dimensional Motion Control and Dynamic Force Sensing of a Magnetically Propelled Micro Particle Using a Hexapole Magnetic Actuator." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1452093964.

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18

Liu, Guangyuan. "Advanced Controllers of Power Electronic Converters in DC Microgrids." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3422330.

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To cope with the pressure of climate change and depletion of fossil fuels, distributed power generation based on sustainable and green resources, such as photovoltaic and wind, have been exploited over the past decades. High penetration of renewable energy sources challenges the normal operation of traditional power grids, due to their characteristics of intermittence and uncertainty. To address this issue, an effective way is to aggregate distributed generators, energy storage systems, and customer loads together, as a single entity, that is, the so-called microgrids. Every microgrid is a ful
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19

Gabi, Yasmine. "Modélisation FEM du système de contrôle non destructif 3MA en ligne de production des aciers dual phase." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00749118.

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Les métallurgistes d'ArcelorMittal développent actuellement une nouvelle génération d'aciers " flat carbon" dédiés principalement au domaine automobile (aciers Dual- Phase ou DP). Afin d'augmenter la performance des aciers au carbone, ArcelorMittal développe une stratégie de production intelligente basée sur un contrôle non destructif en ligne de production en utilisant le capteur 3MA (Multi-Parameter Micro-Magnetic Microstructure and Stress Analyzis). Ce système a été développé par l'Institut Fraunhôfer IZFP ; il est dédié à divers domaines d'applications de contrôle non destructifs des acier
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20

Rutkovskiy, Yaroslav. "A Novel Control Method for Grid Side Inverters Under Generalized Unbalanced Operating Conditions." Cleveland State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=csu1610646102417883.

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21

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

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In recent years, multilevel converters are becoming more popular and attractive than traditional converters in high voltage and high power applications. Multilevel converters are particularly suitable for harmonic reduction in high power applications where semiconductor devices are not able to operate at high switching frequencies or in high voltage applications where multilevel converters reduce the need to connect devices in series to achieve high switch voltage ratings. This thesis investigated two aspects of multilevel converters: structure and control. The first part of this thesis foc
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22

Magee, Warwick R. "Development of an electromagnetic actuator for active vibration control." Thesis, Queensland University of Technology, 1997.

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23

Jing, Linyuan. "HYSTERESIS IN REPOLARIZATION OF CARDIAC ACTION POTENTIALS: EFFECTS OF SPATIAL HETEROGENEITY AND SLOW REPOLARIZATION CURRENTS." UKnowledge, 2013. http://uknowledge.uky.edu/cbme_etds/11.

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Repolarization alternans, i.e. beat-to-beat variation of repolarization of action potential, is proposed as a predictor of life-threatening arrhythmias. Restitution relates repolarization duration with its previous relaxation time, i.e. diatstolic interval (DI), and is considered a dominant mechanism for alternans. Previously, we observed that different repolarization durations at the same DI during decelerating and accelerating pacing, i.e. restitution displays hysteresis, which is a measure of “cardiac memory”. Objective of the current study was to investigate in the pig 1) the mechanism for
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24

Thekkevalappil, Soniya Noormuhamed. "Hysteretic pulse width modulation with internally generated carrier for a boost dc-dc converter." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0013267.

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25

Ribbenfjärd, David. "A lumped element transformer model including core losses and winding impedances." Licentiate thesis, KTH, School of Electrical Engineering (EES), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4307.

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<p>In order to design a power transformer it is important to understand its internal electromagnetic behaviour. That can be obtained by measurements on physical transformers, analytical expressions and computer simulations. One benefit with simulations is that the transformer can be studied before it is built physically and that the consequences of changing dimensions and parameters easily can be tested.</p><p>In this thesis a time-domain transformer model is presented. The model includes core losses as magnetic static hysteresis, eddy current and excess eddy current losses. Moreover, the mode
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Almeida, Lucas Alves de. "Estudo de técnicas de controle de máquinas de relutância chaveada para aplicações em sistemas de acionamentos com velocidade variável." Universidade Federal de Juiz de Fora (UFJF), 2018. https://repositorio.ufjf.br/jspui/handle/ufjf/6837.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2018-05-25T12:16:21Z No. of bitstreams: 1 lucasalvesdealmeida.pdf: 7514122 bytes, checksum: a0029ec07180541f754e98112ec47b6b (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2018-06-14T11:52:17Z (GMT) No. of bitstreams: 1 lucasalvesdealmeida.pdf: 7514122 bytes, checksum: a0029ec07180541f754e98112ec47b6b (MD5)<br>Made available in DSpace on 2018-06-14T11:52:17Z (GMT). No. of bitstreams: 1 lucasalvesdealmeida.pdf: 7514122 bytes, checksum: a0029ec07180541f754e98112ec47b6b (MD5) Previous issue date
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27

Arbetter, Barry Steven. "DC-DC converter utilizing hysteretic current-mode control for low-voltage microprocessor systems with power management." Diss., Connect to online resource, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3219222.

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28

Boora, Arash Abbasalizadeh. "Flexible high-power multi DC-DC converters for train systems." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/33208/1/Arash_Boora_Thesis.pdf.

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This thesis reports on the investigations, simulations and analyses of novel power electronics topologies and control strategies. The research is financed by an Australian Research Council (ARC) Linkage (07-09) grant. Therefore, in addition to developing original research and contributing to the available knowledge of power electronics, it also contributes to the design of a DC-DC converter for specific application to the auxiliary power supply in electric trains. Specifically, in this regard, it contributes to the design of a 7.5 kW DC-DC converter for the industrial partner (Schaffler and As
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29

Masoud, Khalid Hasan. "Circuits and controls for grid-connected inverters." Thesis, Queensland University of Technology, 2002.

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30

Krings, Andreas. "Iron Losses in Electrical Machines - Influence of Material Properties, Manufacturing Processes, and Inverter Operation." Doctoral thesis, KTH, Elektrisk energiomvandling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145243.

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As the major electricity consumer, electrical machines play a key role for global energy savings. Machine manufacturers put considerable efforts into the development of more efficient electrical machines for loss reduction and higher power density achievements. A consolidated knowledge of the occurring losses in electrical machines is a basic requirement for efficiency improvements. This thesis deals with iron losses in electrical machines. The major focus is on the influences of the stator core magnetic material due to the machine manufacturing process, temperature influences, and the impact
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31

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

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The Queensland University of Technology (QUT) allows the presentation of theses for the Degree of Doctor of Philosophy in the format of published or submitted papers, where such papers have been published, accepted or submitted during the period of candidature. This thesis is composed of ten published /submitted papers and book chapters of which nine have been published and one is under review. This project is financially supported by an Australian Research Council (ARC) Discovery Grant with the aim of investigating multilevel topologies for high quality and high power applications, with speci
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32

Faudot, Adrien. "Les choix de facturation du commerce international : état des lieux, déterminants, inertie de la monnaie." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAE011/document.

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Malgré une apparente concurrence entre les monnaies, le dollar américain est la monnaie adoptée par la majorité des participants aux échanges internationaux, exportateurs et importateurs. C’est ce que montre l’état des lieux statistique proposé dans cette thèse. Partant d’un tel constat, l’objectif de cette thèse est d’expliquer les choix de monnaies de facturation du commerce international. Différents déterminants ont été établis par la littérature académique pour expliquer les choix de monnaies de facturation. Trois approches, aux méthodologies sensiblement distinctes, y contribuent, et peuv
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33

Carrander, Claes. "Magnetizing Currents in Power Transformers : Measurements, Simulations, and Diagnostic Methods." Doctoral thesis, KTH, Elektroteknisk teori och konstruktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-208422.

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This thesis demonstrates a method for transformer core diagnostics. The method uses the no-load current of the transformer as an indicator, and gives different characteristic signatures for different types of faults or defects. Using the no-load current for the diagnostic gives high sensitivity. The method is therefore able to detect defects that are too small to have an impact on the losses. In addition to different types of fault, the method can in some cases also distinguish between faults in different locations within the core. Both single-phase and three-phase transformers can be diagnose
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34

Curran, Mark James [Verfasser]. "The Hysteretic Limit of a Reaction-Diffusion System with a Small Parameter / Mark James Curran." Berlin : Freie Universität Berlin, 2019. http://d-nb.info/1183675798/34.

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35

Ribbenfjärd, David. "Electromagnetic transformer modelling including the ferromagnetic core." Doctoral thesis, KTH, Elektroteknisk teori och konstruktion, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-13080.

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In order to design a power transformer it is important to understand its internal electromagnetic behaviour. That can be obtained by measurements on physical transformers, analytical expressions and computer simulations. One benefit with simulations is that the transformer can be studied before it is built physically and that the consequences of changing dimensions and parameters easily can be assessed. In this thesis a time-domain transformer model is presented. The model includes core phenomena as magnetic static hysteresis, eddy current and excess losses. Moreover, the model comprises windi
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36

Zorni, Chiara. "Contrôle non destructif par courants de Foucault de milieux ferromagnétiques : de l’expérience au modèle d’interaction." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112031/document.

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La problématique étudiée est le contrôle non destructif par courants de Foucault de matériaux ferromagnétiques à l’aide d’un capteur à magnétorésistance géante (GMR). Durant ces travaux deux aspects complémentaires ont été abordés : l’un concerne la mesure expérimentale pour essayer de quantifier et de s’affranchir du bruit de structure et du champ magnétique rémanent, l’autre le développement d’un modèle numérique d’interaction. En ce qui concerne la partie expérimentale plusieurs études avec un capteur GMR qui présente un intérêt particulier en raison de sa bonne sensibilité à basses fréquen
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Zadeh, Ramin Agha. "Performance control of distributed generation using digital estimation of signal parameters." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/47011/1/Ramin_Agha_Zadeh_Thesis.pdf.

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The Queensland University of Technology (QUT) allows the presentation of a thesis for the Degree of Doctor of Philosophy in the format of published or submitted papers, where such papers have been published, accepted or submitted during the period of candidature. This thesis is composed of seven published/submitted papers, of which one has been published, three accepted for publication and the other three are under review. This project is financially supported by an Australian Research Council (ARC) Discovery Grant with the aim of proposing strategies for the performance control of Distributed
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38

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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39

Lai, Chien-Tsung, and 賴健宗. "HYSTERESIS-CURRENT-CONTROLLED CLASS-D AMPLIFIER WITH ACTIVE CURRENT SENSING TECHNIQUES." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/03439832355051947277.

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碩士<br>龍華科技大學<br>電子系碩士班<br>94<br>A hysteresis-current-controlled (HCC) class-D amplifier with active current sensing techniques is presented in this thesis. The proposed active current sensing circuit uses no passive elements to fully measure the bi-direction inductive load current in class-D amplifier. A hysteresis-current-controller is then used to control the measured current follow a reference signal. 　　The entire circuit contain an error amplifier, a hysterrsis-current-controlled circuit, a sample -and-hold circuit, an active current sensing circuit, a driver circuit……etc. The details of t
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Kuo, Jia-long, and 郭家龍. "Grid Connected Application with Hysteresis Current Control Method." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/02402689351963123620.

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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>100<br>The application of green energy is an important issue. This study design and implementation the controller for the wind power and the grid connected. The voltage of the wind power should be rectifier, filter, DC to DC converter, and inverter to the alternating current. The hysteresis current controller is application with parallel synchronous operation. The Hysteresis current controller using the grid voltage as reference signal so that the phase of the inverter output current is in phase with the voltage, therefore the output of inverter is unity power fa
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Chiu, Mao-Ling, and 邱茂菱. "An On-Chip Current Sensing Technique for Hysteresis Current-Controlled Boost Converters." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/58608561193232615955.

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碩士<br>國立清華大學<br>工程與系統科學系<br>100<br>A novel on-chip current sensing technique suitable for hysteresis-current-controlled (HCC) boost converter is presented which has some advantages, such as simple structure, the improvement of power conversion efficiency, etc. In this thesis, the proposed hysteresis current mode boost converter has a simple structure (the slope compensation is not required) and fast transient response (it has a higher crossover frequency and enough phase margin to avoid the oscillation). When using the proposed SENSEFETs structure and the switching-capacitor technique to moni
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Chen, Chih-Chiang, and 陳志強. "Hysteresis-Current-Controlled Buck/ Buck-Boost Converter Using Active Current Sensing Circuit." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/7q3egk.

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碩士<br>國立臺北科技大學<br>電腦與通訊研究所<br>94<br>In this thesis, We design a new active current sensing circuit and apply this technology fo hysteresis-current-controlled buck/buck-boost converter using active current sensing circuit for portable applications. In the proposed DC-DC converter, the key building blocks includes power MOS, Voltage-current conversion circuit, hysteresis-current comparator, driving circuit, non-overlapping circuit and current sensing circuit. The current sensing circuit can fully sense the inductor current and be used to construct buck/buck-boost converter. The hysteresis-curre
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Chen, Jian-Hao, and 陳建豪. "Constant-Frequency Hysteresis-Current-Controlled DC-DC Converter with Active-Current-Sensing Techniques." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/3j6734.

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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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Kuo, Shin-Jr, and 郭信志. "A Novel Hysteresis Current Controller for Multilevel AC/DC Converters." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/55840900527899460062.

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碩士<br>國立清華大學<br>電機工程學系<br>90<br>Traditionally, only the output power quality specification is emphasized. Not much attention was paid to the harmonic pollution and power factor at the input AC line. However, with the increasingly rigid power quality requirement, more and more researches are devoted to the harmonic reduction and power factor correction in recent decade. As far as high voltage AC/DC converters are concerned, a multi-level hysteresis current controller is indeed a nice strategy to solve the about problem. However, existing multi-level hysteresis current controllers were designed
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Hsiang-YiChu and 朱湘儀. "Dual Buck Inverter with Constant Frequency Variable Hysteresis Current Control." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/90045155481958795728.

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碩士<br>國立成功大學<br>電機工程學系<br>102<br>The purpose of this thesis is to implement a dual buck inverter for tide power transfer system. Because the change of front-end tide power transfer system output AC voltage could be varying and low. By realized the first stage of boost converter to rectify and boost the voltage, then convert power to the second stage of dual buck inverter. The thesis presents a new control strategy of constant frequency with variable hysteresis width. It can design the filter and choose power components easily when using the new type control. Compare to conventional hysteresis
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ZHANG, LONG-KAI, and 張隆凱. "A Temperature-Based Hysteresis Buck Converter for Dynamic Current Sharing." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/dbe3cm.

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碩士<br>逢甲大學<br>電子工程學系<br>107<br>In this study, a temperature-based dynamic current sharing will be applied to improve reliability of uninterruptible power system (UPS).According to temperature information of each power supply module to redistribute output current, we let hotter power module supply lower current to load for achieve better thermal balance of UPS.In this design, we implement by the UMC 0.25µm CMOS technology.Input range 2.9V-3.1V and regular output voltage at 0.825V, maximum output current of each phase is 100mA. We also propose current sharing error correction to improve current
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Kumar, Avinash. "An adaptive hysteresis band current controlled unified power quality conditioner." Thesis, 2013. http://ethesis.nitrkl.ac.in/4658/1/211EE2124.pdf.

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Presence of Harmonics is one of the major power quality problems in the present power system. It is demanded that the utility should ideally provide a balanced and pure sinusoidal three-phase voltage of constant amplitude to the loads. But, with the excessive use of non-linear loads (ASD, Computers, Laser printers, SMPS, Rectifier etc.) power distribution system is getting polluted by harmonics and reactive power disturbances. Harmonics cause a number of undesirable effects like heating, equipment damage and Electromagnetic Interference effects in the nearby communication system. Active power
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Ho, Chumg-Lin, and 何中麟. "Design and Implementation of New Hysteresis-Current Controlled Buck Converter and Current Feedback Voltage Regulator." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/rgn644.

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碩士<br>國立臺北科技大學<br>電腦與通訊研究所<br>97<br>The major research of this thesis can be divided into two parts. In the first part shows the new hysteresis-current-controlled buck converter. It contains some sub-circuiths, inclusive of a power MOS, a current sensing circuit, a sample and hold circuit, a hysteresis-current comparator circuit, a non-overlapping circuit, a driving circuit, a compensator circuit and a zero current detector circuit. The current sensing circuit can fully sense the inductor current and the zero current detector circuit improves effectively at the light load. The proposed circuit
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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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