Дисертації з теми "Equivalent circuit parameter"
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Danielsson, Christer. "Analysis of Synchronous machine dynamics using a novel equivalent circuit model." Licentiate thesis, Stockholm : Skolan för elektro- och systemteknik, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10510.
Повний текст джерелаCrampton, Raymond J. "A nonlinear statistical MESFET model using low order statistics of equivalent circuit model parameter sets." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-03032009-040420/.
Повний текст джерелаSerrat, Yvan. "Un algorithme de vérification du schéma électrique extrait d'un circuit intégré." Grenoble 1, 1987. http://www.theses.fr/1987GRE10007.
Повний текст джерелаAlsabbagh, Mohamad. "Parasitics and Current-Dispersion Modeling of AlGaN/GaN HEMTs Fabricated on Different Substrates Using the Equivalent-Circuit Modeling Technique." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40706.
Повний текст джерелаDareini, Ali. "Prediction and analysis of model’s parameters of Li-ion battery cells." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-11799.
Повний текст джерелаChaiwan, Pramote. "NEW ACCURATE FAULT LOCATION ALGORITHM FOR PARALLEL TRANSMISSION LINES." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/813.
Повний текст джерелаRobinson, Michael J. "Finite element calculation of equivalent circuit parameters for induction motors." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/8003.
Повний текст джерелаSusetyo, Budi. "Modélisation de l'impédance harmonique de charges agrégées." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0027.
Повний текст джерелаPetrone, Raffaele. "Electrochemical Impedance Spectroscopy for the on-board diagnosis of PEMFC via on-line identification of Equivalent Circuit Model parameters." Doctoral thesis, Universita degli studi di Salerno, 2014. http://hdl.handle.net/10556/1476.
Повний текст джерелаProton Exchange Membrane, also named Polymer Electrolyte Membrane fuel cells (PEMFC) are interesting devices for energy conversion. Their development is due to the high efficiency, acceptable power density, quick start-up and good environmental compatibility. On the other hand, reliability cost and durability are the main challenges for PEM fuel cell commercialization. In 2010 the American Department of Energy (DoE) sets a target of 40000 hours for stationary and 5000 hours for automotive applications, respectively. Actually, these standards are considered as the mainly reference in fuel cell research. Based on electro-catalytic reactions, the PEMFC operation is influenced by system functioning conditions. In case of system operation in abnormal conditions several chemical, mechanical and thermal degradation mechanisms could take place inside the cell. Among other, improper water, thermal and gas managements can introduce a cell voltage drop, thus reducing the system performance. A long-term exposure to these phenomena causes the PEMFC lifetime reduction. Thus, a good system management is one of the primary targets to ensure suitable PEMFC durability. For this purpose, research activities are oriented towards the development of newest advanced monitoring and diagnostic algorithms. The primary goal is monitoring the system operation ensuring a correct system control. Moreover, the diagnostic tool (i.e. both algorithm and sensors) allows the detection of system component malfunctioning; it can isolate one or more faults that may have occurred causing the abnormal behaviour of the system operation...[edited by author]
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Tessarolo, Alberto. "Modeling and analysis of multiphase machines for high power applications." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3421670.
Повний текст джерелаQuesta tesi di dottorato tratta della modellizzazione ed analisi di machine multiphase di alta potenza. Nella prima parte, si illustra la tecnologia multifase e la varietà delle sue forme progettuali nel campo degli azionamenti elettrici e della generazione di energia elettrica. Nella descrizione, si fa riferimento ad alcune realizzazione industriali significative che mettono in luce le principali problematiche e vantaggi che possono indurre alla scelta di una configurazione multifase in macchie elettriche di grossa taglia. Successivamente, viene trattata una particolare configurazione multifase detta “split-phase”, propria di quelle macchine il cui avvolgimento statorico è suddiviso in *N *sezioni multifase. La modellizzazione di queste macchine è rivisitata da un punto di vista analitico e ne viene fornita una rappresentazione in termini di circuito equivalente; in particolare, si dimostra teoricamente e sperimentalmente che, quando il numero *N* di sezioni statoriche è maggiore di due, si verifica un accoppiamento magnetico tra i circuiti equivalenti di asse diretto e di asse in quadratura. Successivamente, si considera una diversa tecnica di modellizzazione, chiamata Vector-Space Decomposition (VSD), con l’intento di darne una formulazione estesa che si applica trattare ogni tipo di configurazione multifase, sia simmetrica che non, ricorrendo ad opportune trasformazioni geometriche. Particolare attenzione è dedicata alla formulazione di un metodo generale che consente l’inclusione, nel modello della macchina con tecnica VSD, delle armoniche spaziali dovute alla non-idealità della geometria del traferro e della distribuzione degli avvolgimenti. In risultato che ne consegue è la possibilità di incorporare nel modello a parametri concentrati della macchina *n*-fase, realizzato con metodo VSD, alcune informazioni, legate alla geometria e al progetto di dettaglio della macchina, le quali normalmente possono essere tenute in considerazione mediante approcci di simulazione agli elementi finiti. La quantità di informazioni includibile nel modello a parametri concentrati secondo la tecnica proposta si mostra essere tanto maggiore quanto più grande è il numero di fasi *n*. Come esempio di applicazione, si mostra come gli effetti legati alle armoniche spaziali nel funzionamento di una macchina a poli salienti a 6 fasi e a 9 fasi possano essere riprodotti, mediante analisi agli elementi finiti nel dominio del tempo e mediante il metodo a parametri concentrati proposto, con lo stesso livello di accuratezza ma con un significativo risparmio di tempo e di risorse computazionali in quest’ultimo caso. Una parte della tesi è altresì dedicata al calcolo parametrico dei modelli. Riferendosi al caso di numero e distribuzione generici delle fasi di statore, vengono proposti algoritmi di calcolo dei parametri di magnetizzazione basati sulla teoria basata sulle “winding functions” e metodi di calcolo analitici per i parametri di auto e mutua induttanza dispersa. L’accuratezza dei metodi di calcolo proposti è verificata per confronto con misure su macchine reali. La parte finale della tesi è dedicata allo studio di due fenomeni dettagliati che caratterizzando le macchine elettriche multifase alimentate da più invertitori. Con riferimento all’alimentazione da più invertitori a corrente impressa, viene proposto e validato un modello che descrive i transitori di commutazione tenendo conto degli effetti di mutua interazione tra diverse sezioni dell’avvolgimento. Nel caso di alimentazione da più invertitori a tensione impressa, viene indagato analiticamente e sperimentalmente il fenomeno di correnti armoniche di ricircolo tra le fasi a bassa frequenza, dimostrando come esso si verifichi a causa della struttura interna non-ideale della macchina.
Ibrar, Ibrar. "Study of the effect of temperature on the metrological characteristics of Inductive Current Transformers." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
Знайти повний текст джерелаKuparowitz, Tomáš. "Transport a ukládání náboje ve struktuře superkondenzátoru." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-364610.
Повний текст джерелаPérez, Jiménez Antonio. "Caracterización multimodal de filtros de red y equipos electrónicos." Doctoral thesis, Universitat Ramon Llull, 2008. http://hdl.handle.net/10803/9139.
Повний текст джерела- Desenvolupar sistemes de mesura multimodal per a equips electrònics i filtres de xarxa. Aquests sistemes han de tenir en compte tant el mode comú, com el diferencial, com la seva interacció, i han de millorar les prestacions dels sistemes de mesura normatius actuals.
- Trobar models equivalents des d'un punt de vista multimodal (tenint en compte simultàniament el mode comú, el diferencial i la seva interacció) tant d'equips electrònics com de filtres de xarxa.
- Desenvolupar una metodologia de predicció de les interferències conduïdes que l'equip electrònic subministra a la xarxa elèctrica a través del filtre de xarxa al qual es troba connectat a partir dels models multimodals equivalents proposats per a ambdós dispositius.
PARAULES CLAU: Compatibilitat electromagnètica, filtre de xarxa, equip electrònic, circuit equivalent, emissió conduïda, mode comú, mode diferencial, impedància d'entrada, paràmetres S.
Uno de los problemas más importantes en Compatibilidad Electromagnética es el control de las interferencias emitidas y/o recibidas por un equipo electrónico a través de sus terminales de alimentación monofásica. Estas interferencias se clasifican en modo común y modo diferencial. La manera más usual de mitigarlas es mediante el empleo de filtros de red. Los métodos actuales de diseño de filtros de red abordan la mitigación de este tipo de interferencias por separado: no tienen en cuenta que ambos tipos de señales (modo común y diferencial) interaccionan entre sí y se transfieren energía en cualquier tipo de asimetría originada por los equipos electrónicos o por los mismos filtros. Este hecho produce frecuentemente situaciones inesperadas: inefectividad de los filtros de red, aparición de interferencias en modo común o diferencial inexplicables por la topología de los circuitos, selectividad en frecuencia del filtrado de las interferencias, procesos de radiación, etc. Este tipo de situaciones pueden ser analizadas y corregidas a partir de un análisis multimodal, que tenga en cuenta simultáneamente el modo común y el diferencial, y su interacción. El trabajo aquí expuesto pretende:
- Desarrollar sistemas de medida multimodal para equipos electrónicos y filtros de red. Dichos sistemas deben tener en cuenta tanto el modo común, como el diferencial, como su interacción, y deben mejorar las prestaciones de los sistemas de medida normativos actuales.
- Hallar modelos equivalentes desde un punto de vista multimodal (teniendo en cuenta simultáneamente el modo común, el diferencial y su interacción) tanto de equipos electrónicos como de filtros de red.
- Desarrollar una metodología de predicción de las interferencias conducidas que el equipo electrónico suministra a la red eléctrica a través del filtro de red al cual está conectado a partir de los modelos multimodales equivalentes propuestos para ambos dispositivos.
PALABRAS CLAVE: Compatibilidad electromagnética, filtro de red, equipo electrónico, circuito equivalente, emisión conducida, modo común, modo diferencial, impedancia de entrada, parámetros S.
One of the most important problems in EMC is the control of the common and differential mode interferences emitted or received by an electronic device through its single phase power-line cable. These interferences are mitigated using power-line filters. The present power-line filter methodologies treat separately the mitigation of this kind of interferences: they do not take into account that both modes interact and exchange energy at any kind of asymmetry originated by the devices connected to the power-line, or by the power-line filters themselves. This fact leads to unexpected situations: power-line filter infectivity, appearance of common and differential mode interferences not accountable by the circuit topology, frequency selectivity of the interferences, radiation processes, etc. This kind of situations can be analyzed and corrected using multimodal analysis, which takes into account at the same time the common mode, the differential mode and their interaction. This project aims to:
- Develop accurate multimodal measurement systems for both electronic devices and power-line network filters. They have to consider the common and differential modes, and their interaction, and have to improve the features of present normative measurement systems.
- Derive equivalent models from a multimodal point of view (taking into account simultaneously the common mode, the differential mode and their interaction) for both electronic devices and power-line filters.
- Develop a methodology for predicting the level of conducted emissions that an electronic device supplies to the power-line network through the power-line filter to which it is connected, using the equivalent multimodal models proposed for both devices.
KEYWORDS: Electromagnetic compatibility, power-line filter, electronic device, equivalent circuit, conducted emissions, common mode, differential mode, input impedance, S parameters.
Karisan, Yasir. "Full-wave Electromagnetic Modeling of Electronic Device Parasitics for Terahertz Applications." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1419019102.
Повний текст джерелаFialka, Jiří. "Měření parametrů piezoelektrických materiálů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217770.
Повний текст джерелаHamdi, Bilel. "Modélisation des circuits périodiques et quasi-périodiques alimentés par des sources arbitraires." Thesis, Toulouse, INPT, 2015. https://oatao.univ-toulouse.fr/25877/1/HAMDI_Bilel.pdf.
Повний текст джерелаPlanar antenna arrays are renowned for their high directivity and ease of implementation, which offers the possibility of having a controllable radiation pattern. However the global study taking into account the different EM couplings by a rigorous electromagnetic theory requires a large memory space and a considerable computation time. To overcome these drawbacks, we propose to introduce a new theoretical approach based on the Floquet theorem allowing the reduction of the EM analysis volume at the level of a single elementary cell (basic cell). We will focus our study on the determination of coupling terms in a distributed configuration in an almost-periodic frame and in particular for periodic and quasi-periodic antenna arrays fed by arbitrary sources. In this case, we will use Floquet mode decompositions (adapted to periodic structures) to extract the coupling matrix [S]. These decompositions are concepts established for a long time and a priori demonstrated by solid theoretical supports. Consequently, this modal analysis makes it possible to simplify considerably the resolution of the problem, especially when the radiating elements are strongly coupled. A single numerical method is adopted in order to model the proposed structure: the method of moments combined with the generalized equivalent circuit: MoM-GEC. Validation of the latter will be done by comparison with other exact numerical methods
Li, Jyun-lun, and 李俊侖. "Parameter Derivation for Equivalent Circuit Model of Induction Cookers." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/32323084765715434331.
Повний текст джерела國立中山大學
電機工程學系研究所
104
A half-bridge series resonant inverter is implemented to recognize the parameters of the equivalent circuit model of an induction coil loaded with steel pots for induction cookers. When a steel pot is loaded on the induction coil, the circuit parameters and thus the resonant frequency vary with the shape and material of the pot. The effects of the inverter switching frequency and the position between the pot and the induction coil are analyzed from experimental tests with seven pots of different shapes and materials. Accordingly, the parameters of the equivalent circuit can be expressed as equations with functions of the switching frequency. The derived circuit model can be used for determining the operating ranges of the output power and the switching frequency of the resonant inverter loaded by specified pots with similar operating characteristics. The parameter derivation method to two exemplar design cases of 2.5-kW and 3.3-kW inductor cookers has been validated by experimental tests.
Chen, Kuan-Hsu, and 陳冠旭. "RF MOSFET Small Signal Equivalent Circuit Model Parameter Extraction for Various Biases and Geometries." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/52970935108922010651.
Повний текст джерела國立交通大學
電子工程系所
97
Small signal equivalent circuit models and the corresponding parameter extraction methods have been developed in this thesis for RF CMOS circuit simulation. Both two-port 3-terminal (3T) and four-port 4-terminal (4T) RF MOSFETs are covered in this work. The former one – 3T MOSFETs with a common source topology is a conventional one widely used in RF circuits, and the test-key layout is arranged in a two-port configuration with a common ground for source and body tied together to fit the two-port RF measurement system. In fact, source and body terminals are not always connected together in the practice of RF circuit design, the traditional two-port test-key cannot capture a whole spectrum of 4T MOSFET’s features and cannot adequately represent 4T MOSFET’s characteristics over high frequencies. To solve this critical problem, the latter one – four-port 4T RF MOSFETs are designed and fabricated in 0.13um RF CMOS process for high frequency characterization and model development in this work. In this thesis, the basic principles of two-port and multi-port scattering parameters (S-parameters) will be reviewed in the first place. Then, the small signal equivalent circuits and parameter extraction methods developed for two-port 3T device under various biases and geometries will be discussed in detail. Based on what have been done for two-port 3T MOSFET, a modified equivalent circuit relevant to four-port 4T test structures, and the corresponding fundamental works, such as de-embedding method and parameter extraction flow have been carried out. Finally, an extensive verification has been performed on the proposed small signal equivalent circuit models through simulation under various biases. The model accuracy is certified over a broad frequency up to 40GHz and various bias conditions – linear and saturation. More importantly, the model parameters of the developed equivalent circuit models manifest themselves a promisingly good scalability over various geometries in MOSFETs, such as gate lengths and gate finger numbers under a specified finger width. The accuracy over frequencies and biases and scalability over device geometries is useful to improve accuracy of high frequency circuit simulation and facilitate RF CMOS integrated circuit development.
Chang, Ting-Chen, and 張庭禎. "Parameter Derivation of Equivalent Circuit Model for Photovoltaic Panel with Ripple Current Orientation Method." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/66350592792619886531.
Повний текст джерела國立中山大學
電機工程學系研究所
104
For a photovoltaic (PV) panel, an equivalent circuit with an additional parasitic capacitance on the conventionally used single-diode static model can be used to interpret the phase deviation between the output voltage and current and to simulate the dynamic characteristics. The parameters of the equivalent circuit can be derived simply from five test points when a boost converter is attached to the PV panel for maximum power point tracking (MPPT) drawing a rippled current. The circuit parameters of the static model are calculated from the open-circuit voltage, the maximum power, and the short-circuit current, which can be rapidly obtained by operating the boost converter at a designated ripple current. An equation to account for the variation of the parasitic capacitance can be derived from two arbitrary operation points with voltages less than the diode threshold voltage of the PV panel. The circuit parameters for different irradiations can be obtained from the ratio of the short circuit current to the pre-known short-circuit current. Experimental results have confirmed that fitness of the equivalent circuit model with parameter identification and demonstrated that it can be used for simulating the transient behaviors of a PV panel with a rippled current.
余昱穎. "Bias Dependence and Geometry Effect of SiGe HBTs Equivalent circuit Elements using Direct Parameter-Extraction Method." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/77801493815957913719.
Повний текст джерелаHsieh, Chun-ting, and 謝俊霆. "Equivalent Electric Circuit Simulation and Experiment for Foundation Vibration with the Application of Systematic Lumped-parameter Models." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/63222643763092048795.
Повний текст джерела國立雲林科技大學
營建工程系碩士班
93
Based on the concept for approximating the dynamic flexibility function of foundation by polynomial-fraction, different mathematical methods have been developed in recent studies to decompose this polynomial-fraction and then directly correspond it to various types of systematic lumped-parameter models for representing the dynamic behavior of unbounded soil. Other than being applied for the simplification in analysis and design, these systematic lumped-parameter models can be also correlated to equivalent electric circuits due to their concise mathematical formulation and simple physical correspondence. Therefore, these models further lead to great potentials in efficiently simulating soil-structure interaction (SSI) effects in the laboratory. This research is consequently focused on the exploration of employing a simple equivalent electric circuit to simulate the lumped-parameter model and hopefully will provide clear directions for future studies in representing a total SSI system with the experiment of electric circuits. After establishing the extensive similarity between the basic mechanical elements in a lumped-parameter model and the fundamental electronic elements in an electric circuit, the effectiveness of using an equivalent electric circuit to simulate the dynamic behavior of soil system is first verified in this study with the application of circuit simulation software. Even though there theoretically exist two alternatives in corresponding to the input force with either the electric current or voltage, this study only adopts the correspondence of the electric voltage to the input force in conducting the electric circuit simulations and experiments since it is relatively convenient to control the input voltage in an electric circuit. According to the investigation on different vibration directions of an embedded square foundation system, the experimental results for the equivalent electric circuits generally agree well with the analytical results for the corresponding lumped-parameter models except for certain minor high-frequency noises from the measurements of electric current. With comparing the results for inputting different earthquake motions, it can also be observed that the circuit experiment errors in the cases of low-frequency earthquakes are noticeably larger than those in the cases of high-frequency earthquakes. Moreover, the approximation with the equivalent circuit in the cases of rocking and torsional vibrations of foundation is deteriorated, compared to the cases of horizontal and vertical vibrations. In summary, the experimental results demonstrate that the simulation of a lumped-parameter model with a simple equivalent electric circuit is essentially effective and successful considering the limitations from experiment equipments. It is expected that the research scope and application possibility of the equivalent electric circuit can be significantly extended if the limitations coming from experiment equipments can be overtaken in the future.
Huang, Shih-Pin, and 黃士賓. "General Systematic Lumped-parameter Models for Foundation Vibration and Preliminary Study on Their Equivalent Electric Circuit Simulation." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/20412242333993615493.
Повний текст джерела國立雲林科技大學
營建工程系碩士班
92
Based on the approximation by polynomial-fraction, different mathematical methods are applied in this study to investigate its various possible decompositions. These decompositions are further categorized to develop various types of systematic lumped-parameter models for efficiently representing the dynamic behavior of unbounded soil. Following the concise formulation employing a ratio of two polynomials to represent the normalized dynamic flexibility function of foundation and then solving the optimal coefficients of the polynomials, this research starts with two mathematical decomposition methods. The first method deduces three different decompositions according to nested division and also defines the transformation between the high-order type and low-order type of polynomial-fraction. Subsequently, systematic nested decomposition can be performed on the original polynomial-fraction representing the normalized dynamic stiffness function. The second method is to decompose the polynomial-fraction into the summation of numerous first-order and second-order partial fractions with real coefficients via partial-fraction expansion. This method can be corresponded to an “in-series” type and another “in-parallel” type of physical arrangement based on the high-order type of polynomial-fraction in flexibility formulation and the low-order type of polynomial-fraction in stiffness formulation. Moreover, applying the nested division decomposition, each decomposed second-order partial fraction can also be corresponded to three different discrete-element models. Finally, with the combination of the above two types of polynomial-fraction decomposition, four alternative decomposition options can be obtained in each round of decomposition operation and various systematic lumped-parameter models can be consequently constructed. Furthermore, another major phase of this study is to explore the possibility of using equivalent electric circuits to simulate systematic lumped-parameter models. With the mathematical correspondence between certain electronic elements and mechanical elements, this research develops two types of electric circuit systems to simulate the dynamic system represented by a lumped-parameter model. Applying the electric circuit simulation software OrCAD PSpice A/D, this part of preliminary investigation sufficiently verifies the feasibility and accuracy in utilizing electric circuit simulations to study the foundation vibration problems.
Yeh, Chih-Ting, and 葉致廷. "Three Terminal and Four Terminal RF MOSFET Model Parameter Extraction Methods Development and Verification by Equivalent Circuit Simulation." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/01478305174414679454.
Повний текст джерела國立交通大學
電子工程系所
94
Parameter extraction method development is very important for accuracy of simulation. In the past, foundries always provide customers with the 3T sample layout, whose source and body terminals are connected together. But foundries tend to provide customers with 4T sample layout for circuit designers’ purpose at present. And model card is constructed on 4T device to match the practical using way of circuit designers. In order to provide circuit designers with accurate model card, reliable parameter extraction method development is obviously important. 3T and 4T device in the thesis are put in 2-port pad to do RF measurement and parameters extraction. In this thesis, 2-port de-embedding and parameters extraction methods have been discussed in detail and used extracted parameters to verify the reliability and accuracy of small signal equivalent model. Obtaining correct small signal equivalent model represents that we can extract correct parameter values which could provide us with direction and thought to construct better model card. The last part of this thesis is detailed discussion of parasitic capacitances. The results reveal that the simulation and analytical calculated are very matched. This represents the thought applied to calculating process is very correct. The success of analytical calculated model can accurately estimate the parasitic capacitances of specific structure. It is worthy to mention that the calculating method is more direct and simpler than other published references.
Liu, Chin-ying, and 劉京鷹. "Evaluation of the Equivalent circuit Parameters of a Photovoltaic Array." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/24726298446290107362.
Повний текст джерела雲林科技大學
電機工程系碩士班
96
This thesis presents a measurement technique for the analysis of the equivalent circuit parameters of solar cells and modules, including the presentation of the measurement system. Several I-V characteristic curves of solar cells and modules were obtained from measurement. The proposed methods include the straightforward calculation and least-squares to calculate the five parameters of the circuit model, allowing the I-V characteristic curves of solar cells and modules to be drawn by bring those parameters into I-V characteristic equation. Comparison between calculated and measured results have been carried out to test the accuracy and reliability of the two methods. Finally, application of this measuring method and calculation method to analysis the partial shading fault of PV system is also presented.
Wu, Hsin-Jung, and 吳欣蓉. "The Extraction of Equivalent Circuit Model Parameters On InGaAsSb Heterojunction Bipolar Transistors." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/68150079599585729534.
Повний текст джерела雲林科技大學
光學電子工程研究所
96
This thesis summarizes extraction of DC parameters and thermal parameters in VBIC equivalent circuit model for In0.4Ga0.6As0.8Sb0.2 hetero-junction bipolar transistors. Both critical and negligible parameters are pointed out in order to obtain an accurate model. To reduce the time spent in measurement and extract parameters efficiently, the extraction focuses on forward mode operation and neglects reverse mode operation. Parameters for reverse operation are used to optimize the collector current versus collector-emitter voltage (IC-VCE) output characteristic. In the forward Gummel plot, ideal current region is essential for initial parameters extraction, and high current region is important for obtaining a satisfying result in the IC-VCE output characteristic. Early effect, self-heating effect, and avalanche breakdown effect are considered in the IC-VCE output characteristic. This extraction procedure is efficient and the VBIC model parameters are validated by ADS simulation.
Chen, Chun-chung, and 陳俊中. "Extracting MOSFET Small Signal Equivalent Circuit and Substrate Parameters with Four Port De-embedding Method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/4322rd.
Повний текст джерела國立中山大學
電機工程學系研究所
97
Characteristics of small signal components for circuit designers are very important in circuit design. Many researchers have been working hard on removing the unwanted parasitic effects which is used to get the intrinsic characteristics of the small signal parameters. In this thesis, we propose a novel four-port de-embedding procedure which based on two-port cascade structure de-embedding procedure and combined with metal and polysilicon ground-shielded technology, and let four terminals of MOSFET are connected individually to four signal pads. With such de-embedding procedure, the intrinsic and substrate element values of small-signal model are extracted by different bias.
Kuan-JuChen and 陳冠儒. "Table-based Estimation of First-Order Equivalent Circuit Parameters for Li-ion Batteries under Different Charge Currents." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/ej4325.
Повний текст джерела國立成功大學
系統及船舶機電工程學系
106
This thesis describes a table-based derivation of first-order RC equivalent circuit parameters for a Lithium-ion battery circuit in order to estimate the cell voltage of a battery under different charging currents. The first-order RC equivalent circuit of a battery consisted of one voltage source, one resistance and one resistor-capacitor circuit was able to account for the charging dynamics observed in the experiment. Two sets of parameters for a battery tested at room temperature were derived from two different pulse voltage curves. One was under 1.176 A pulse charging current, and the other was under 0.84 A pulse charging current. Then, the equivalent circuit parameters were used to estimate the cell voltage of a battery with a four-stage constant current (4SCC) charging method. The mean absolute percentage error (MAPE) between the measured and estimated cell voltages of batteries charged with the 4SCC charging method were calculated to be 0.55 % and 0.28 %, respectively. The overall seems to be very accurate, but the maximum relative error is as high as 3 %. It is not accurate, especially for balancing circuit design or charging method based on voltage. Since the charge current of the 4SCC charging method varies in different stages, using a set of the individual parameters to simulate the cell voltage of a battery charged with the 4SCC charging method is not accurate due to different SOCs (State of Charges) stored at various stages. To solve such problem, this study proposes to use a look-up table approach to mitigate the MAPE of the measured and estimated cell voltage of a battery charged with the 4SCC charging method. The MAPE is reduced to be 0.2 %.
Silva, Hugo Filipe Vieira da. "Simulação e comparação dos parâmetros do circuito equivalente por fase de motores de indução trifásicos com rotor em gaiola de esquilo de diferentes classes de rendimento." Master's thesis, 2016. http://hdl.handle.net/10316/81543.
Повний текст джерелаOs objetivos principais desta dissertação são, de uma forma geral, comparar as alterações dos parâmetros do circuito equivalente por fase de quatro motores de indução trifásico com rotor em gaiola de esquilo de classes de rendimento IE1, IE2, IE4 de um único fabricante, correlacionando-os com as perdas que os mesmos produzem e com aspetos construtivos dos motores em termos dimensionais e de quantidade e qualidade dos materiais ativos utilizados. Serão desenvolvidos modelos de simulação para os diferentes motores analisados, com bases em ensaios experimentais.Este documento está estruturado da seguinte forma:O capítulo 1 exibe o enquadramento do tema sobre o qual se desenvolveu esta dissertação.No capítulo 2 são apresentados os conceitos gerais relacionados com o motor de indução trifásico com rotor em gaiola de esquilo. Inicialmente é abordado o princípio de funcionamento do motor e são relatados os principais aspetos construtivos do mesmo. De seguida é fundamentado a obtenção do circuito equivalente por fase do motor com representação dos parâmetros do mesmo. São também definidas as perdas elétricas e mecânicas que ocorrem no motor de indução e por último, é feita uma comparação das duas principais normas usadas para o cálculo do rendimento dos motores.No capítulo 3 é feita uma descrição das montagens experimentais, equipamentos e procedimentos utilizados na realização das medições. De seguida são abordados dois métodos de cálculo dos parâmetros do esquema equivalente, sendo um pela análise do circuito e outro seguindo o procedimento aconselhado pela norma IEEE 112, com respetiva análise de resultados. Posteriormente é fundamentado o cálculo dos valores de rendimento obtidos, comparando as normas IEEE 112 e IEC 60034-2-1, com respetiva análise. Para finalizar serão mostrados os resultados obtidos das simulações realizadas.Finalmente, o capítulo 4 expõe as principais conclusões retiradas do trabalho desenvolvido e propõe algumas sugestões para trabalho futuro. ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
In this dissertation, the main parameter changes of IE1, IE2, IE3 and IE4 class induction motors, from one single supplier, are to be compared and correlated with the power losses produced and respective constructive differences in terms of dimension and active materials quantity and quality. On the basis of the experimental tests, simulation models for the different analyzed motors will be developed.This document has the following structure:Chapter 1 explains the framing of the theme of this thesis.In chapter 2, general concepts related with squirrel cage induction motors are presented.Initialy, is explained the working principle of the induction motor and the constructional features of this kind of motor are shown. Next, the equivalent circuit of induction motor is substantiated, with electric parameters represented. The electrical and mechanical losses are described and explained, and finally a comparison between the two main standards for electric machinery efficiency determination are made.In chapter 3, are described the experimental setups, equipment and procedures usedwhen carrying out the measurements. Then, two calculation methods of equivalent circuit parameters are explained and compared with appropriate analysis of the results. Posteriorly, the efficiency calculation values are shown with a comparison between standars IEEE 112 and IEC 60034-2-1, and finally, a critical analisys based on computation simulation results are made,Chapter 5 presents the main conclusions from the work developed and some suggestionsfor future work._______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________