Bibliographies thématiques / Equivalent circuit parameter

Littérature scientifique sur le sujet « Equivalent circuit parameter »

Auteur : Grafiati
Publié le 14 mars 2023

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Articles de revues sur le sujet "Equivalent circuit parameter"

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Akimoto, Benjamin, et Wataru Natsu. « Study on Parameter Determination for ECM Equivalent Circuit ». Applied Mechanics and Materials 220-223 (novembre 2012) : 1990–94. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.1990.

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The analysis of the ECM model expressed by an equivalent circuit is helpful to understand the ECM characteristics, such as the removal rate and machining accuracy. However, the parameters in the ECM equivalent circuit have not been determined yet, although several kinds of equivalent circuits were proposed. In this research, the parameters of the ECM equivalent circuit were determined experimentally, and the determination reliability was discussed.
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Aminu, M., M. Abana, S. W. Pallam et P. K. Ainah. « Nonintrusive Method for Induction Motor Equivalent Circuit Parameter Estimation using Chicken Swarm Optimization (CSO) Algorithm ». Nigerian Journal of Technological Development 18, no 1 (24 juin 2021) : 21–29. http://dx.doi.org/10.4314/njtd.v18i1.4.

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This paper presents a nonintrusive method for estimating the parameters of an Induction Motor (IM) without the need for the conventional no-load and locked rotor tests. The method is based on a relatively new swarm-based algorithm called the Chicken Swarm Optimization (CSO). Two different equivalent circuits implementations have been considered for the parameter estimation scheme (one with parallel and the other with series magnetization circuit). The proposed parameter estimation method was validated experimentally on a standard 7.5 kW induction motor and the results were compared to those obtained using the IEEE Std. 112 reduced voltage impedance test method 3. The proposed CSO optimization method gave accurate estimates of the IM equivalent circuit parameters with maximum absolute errors of 5.4618% and 0.9285% for the parallel and series equivalent circuits representations respectively when compared to the IEEE Std. 112 results. However, standard deviation results in terms of the magnetization branch parameters, suggest that the series equivalent circuit model gives more repeatable results when compared to the parallel equivalent circuit. Keywords: Induction motor, Chicken Swarm Optimization, parameter estimation, equivalent circuit, objective function
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García-Sánchez, Francisco, Beatriz Romero, Denise Lugo-Muñoz, Pozo del, Belén Arredondo, Juin Liou et Adelmo Ortiz-Conde. « Modelling solar cell S-shaped I-V characteristics with DC lumped-parameter equivalent circuits a review ». Facta universitatis - series : Electronics and Energetics 30, no 3 (2017) : 327–50. http://dx.doi.org/10.2298/fuee1703327g.

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This article reviews and appraises the dc lumped-parameter equivalent circuit models that have been proposed so far for representing some types of solar cells that can exhibit under certain circumstances a detrimental S-shaped concave deformation within the energy-producing fourth quadrant of their illuminated I-V characteristics. We first present a very succinct recollection of lumped-parameter equivalent circuits that are commonly used to model conventional solar cells in general. We then chronologically present and discuss lumped-parameter equivalent sub-circuits that, combined with conventional solar cell equivalent circuits, are used to specifically represent the undesired S-shaped behaviour. The mathematically descriptive equations of each complete equivalent circuit are also examined, and closed form solutions for the terminal current and voltage as explicit functions of each other are presented and discussed whenever available. While comparing the most salient features and explaining the practical advantages and disadvantages of such equivalent circuit models, we offer some comments on possible directions for further improvement.
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Wurpts, Wiebold, Jens Twiefel et Francois Brouet. « Equivalent Circuit Parametrization Utilizing FE Model Order Reduction and its Application to Piezoelectric Generators and Actuators ». Energy Harvesting and Systems 4, no 3 (27 novembre 2017) : 115–29. http://dx.doi.org/10.1515/ehs-2017-0002.

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Abstract Equivalent circuits are often the first choice for the modeling of piezoelectric systems, as they allow for the consideration of the complete electro-mechanical system with one or even more modes. The parameters of the equivalent circuit model are identified by a measured or simulated frequency response. In this contribution a method for a direct modal condensation of the equivalent parameters for arbitrary FE structures and loads is described and discussed. First the proposed method is demonstrated for a continuous piezoelectric rod and then applied to discrete finite element models. The derived equivalent circuit has an identical appearance to the classical solution, but additionally allows arbitrarily load conditions. Furthermore, the structure of the derived equivalent circuit depends on whether short- or open-circuited modes are used for the modal expansion. The influence of truncated modes is discussed utilizing residual terms, leading to a better understanding of the circuit parameters. Additionally the model based approaches in the third part an experimental parameter identification procedure for many modes is presented as well. The influence of the load and the quality of the model order reduction are discussed for piezoelectric rods. The methods are demonstrated for a base excited energy harvesting system an ultrasonic grubber.
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YAN, ZHAN-YUAN, JIN-YING MA et XIAO-HONG ZHANG. « QUANTIZATION OF MESOSCOPIC QUARTZ PIEZOELECTRIC CRYSTAL EQUIVALENT CIRCUIT ». Modern Physics Letters B 25, no 11 (10 mai 2011) : 847–53. http://dx.doi.org/10.1142/s0217984911026139.

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In the framework of an advanced quantum theory for mesoscopic electric circuits in accord with the discreteness of electric charges, a mesoscopic quartz piezoelectric crystal equivalent circuit is quantized. To resolve the finite difference Schrödinger equation, an improved parameter perturbative method is proposed when WKB and perturbative method are inapplicable. With this method, the energy spectrum and wavefunctions of the system are obtained and used to calculate current quantum fluctuation as an application. The new method would be helpful to the application of the mesoscopic circuits quantum theory. Besides, the detail characters of energy spectrum and wavefunctions in the system would be helpful to the design of integrate circuit.
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Wang, Xing Wu, Zhao Yan Zhang et Yong Jun Lin. « Research on Identification of Induction Motor Parameters Based on Nameplate Data ». Applied Mechanics and Materials 721 (décembre 2014) : 517–22. http://dx.doi.org/10.4028/www.scientific.net/amm.721.517.

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A new method for identification of motor equivalent circuit parameters is proposed based on motor nameplate and particle swarm optimization (PSO). That is effective solution to the present problems of motor equivalent circuit parameters identification method. An accurate motor equivalent circuit is built by introducing an equivalent stray-loss resistance, mechanical loss, and slip loss of ring brushes contact for wound motor. The identification accuracy of motor equivalent circuit parameters is improved. An identification optimization model of equivalent circuit is established based on motor nameplate parameters and motor equivalent circuit’s calculating parameters. With PSO for solving optimization model is achieved a higher probability optimization goals. Finally, a group of equivalent circuit parameters to achieve the objective function value is randomly selected. The motor electrical parameters is calculated at different speeds with the equivalent circuit identified parameters and compared with the measured values. Experimental results demonstrate the proposed parameter identification method based on motor nameplate parameters and combining PSO optimization method is effective.
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Ascencion-Mestiza, Hector, Serguei Maximov, Efrén Mezura-Montes, Juan Carlos Olivares-Galvan, Rodrigo Ocon-Valdez et Rafael Escarela-Perez. « Estimation of the Equivalent Circuit Parameters in Transformers Using Evolutionary Algorithms ». Mathematical and Computational Applications 28, no 2 (3 mars 2023) : 36. http://dx.doi.org/10.3390/mca28020036.

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The conventional methods of parameter estimation in transformers, such as the open-circuit and short-circuit tests, are not always available, especially when the transformer is already in operation and its disconnection is impossible. Therefore, alternative (non-interruptive) methods of parameter estimation have become of great importance. In this work, no-interruption, transformer equivalent circuit parameter estimation is presented using the following metaheuristic optimization methods: the genetic algorithm (GA), particle swarm optimization (PSO) and the gravitational search algorithm (GSA). These algorithms provide a maximum average error of 12%, which is twice as better as results found in the literature for estimation of the equivalent circuit parameters in transformers at a frequency of 50 Hz. This demonstrates that the proposed GA, PSO and GSA metaheuristic optimization methods can be applied to estimate the equivalent circuit parameters of single-phase distribution and power transformers with a reasonable degree of accuracy.
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Wang, Jianlin, Le Zhang, Dan Xu, Peng Zhang et Gairu Zhang. « A Simplified Fractional Order Equivalent Circuit Model and Adaptive Online Parameter Identification Method for Lithium-Ion Batteries ». Mathematical Problems in Engineering 2019 (3 avril 2019) : 1–8. http://dx.doi.org/10.1155/2019/6019236.

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In order to improve the battery management system performance and enhance the adaptability of the system, a fractional order equivalent circuit model of lithium-ion battery based on electrochemical test was established. The parameters of the fractional order equivalent circuit model are identified by the least squares parameter identification method. The least squares parameter identification method needs to rely on the harsh test conditions of the laboratory, and the parameter identification result is static; it cannot adapt to the characteristics of the lithium battery under dynamic conditions. Taking into account the dynamic changes of lithium batteries, a parameter adaptive online estimation algorithm for fractional equivalent circuit model is proposed. Based on the theory of fractional order calculus and indirect Lyapunov method, the stability and convergence of the estimator are analyzed. Finally, simulation experiments show that this method can continuously estimate the parameters of the fractional order equivalent circuit under UDDS conditions.
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Araújo, N. M. F. T. S., F. J. P. Sousa et F. B. Costa. « EQUIVALENT MODELS FOR PHOTOVOLTAIC CELL – A REVIEW ». Revista de Engenharia Térmica 19, no 2 (21 décembre 2020) : 77. http://dx.doi.org/10.5380/reterm.v19i2.78625.

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Over the years, the contribution of photovoltaic energy to an eco-friendly world is continually increasing. Photovoltaic (PV) cells are commonly modelled as circuits, so finding the appropriate circuit model parameters of PV cells is crucial for performance evaluation, control, efficiency computations and maximum power point tracking of solar PV systems. The problem of finding circuit model of solar PV cells is referred to as “PV cell equivalent model problem”. In this paper, the existing research works on PV cell model parameter estimation problem are classified according to error quali-quantitative analysis, number of parameters, translation equations and PV technology. The existent models were discussed pointing out its different levels of approximation. A qualitative comparative ranking was made and four models were found to be the best ones for simulating PV cells. Besides, based on the conducted review, some recommendations for future research are provided.
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Fujimaki, Tadao, Katsumi Ohniwa et Osamu Miyashita. « Parameter Estimation of Equivalent Circuit for Induction Motor ». IEEJ Transactions on Industry Applications 109, no 8 (1989) : 603. http://dx.doi.org/10.1541/ieejias.109.603.

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Thèses sur le sujet "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.

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Crampton, 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/.

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Serrat, Yvan. « Un algorithme de vérification du schéma électrique extrait d'un circuit intégré ». Grenoble 1, 1987. http://www.theses.fr/1987GRE10007.

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L'etude presentee concerne la verification du schema electrique d'un circuit integre obtenu par extraction. Cette verification est basee sur la comparaison du schema electrique extrait avec le schema electrique de reference, utilise par le concepteur pour dessiner le circuit. Du point de vue mathematique, une telle comparaison est equivalente a un test d'isomorphisme effectue sur les graphes associes aux deux schemas. L'algorithme employe prend en compte tous les parametres des graphes (connectivite, type de noeuds, type de liaisons. . . ) pour determiner si oui ou non ces graphes sont isomorphes, avec une complexite abordable, ce qui permet son application a des circuits d'assez grande taille
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Alsabbagh, 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.

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Electrical equivalent circuit modeling of active components is one of the most important approaches for modeling high-frequency high-power devices. Amongst the most used microwave devices, AlGaN/GaN HEMTs demonstrated their superior performance, making them highly suitable for 5G, wireless and satellite communications. Despite the remarkable performance of AlGaN/GaN HEMTs, these devices reside on substrates that invoke limitations on the operating-frequency, power-efficiency, and current dispersion phenomenon. Also, there is a limitation in present parameters extraction techniques being not able to consider both the substrate effect (Silicon, Silicon Carbide, and Diamond) and the asymmetrical GaN HEMT structure. In this thesis work, a single extrinsic parameters extraction technique using a single small-signal topology takes into account both the asymmetrical GaN HEMT structure and the different substrate types with their parasitic conduction will be developed and studied for the first time. Moreover, large-signal modeling using Quasi-Physical Zone Division technique has been applied to both GaN/D and GaN/SiC to model the isothermal-trapping free drain current, and combined with a new simple technique for comparing performance between active devices in terms of current-dispersion. The models were verified by simulating the small-signal S-parameters, large-signal IV characteristics, and single-tone load-pull. High accuracy was achieved compared to the measurement data available in the technical literature and obtained from fabricated devices.
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Dareini, 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.

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Lithium-ion batteries are complex systems and making a simulation model of them is always challenging. A method for producing an accurate model with high capabilities for predicting the behavior of the battery in a time and cost efficient way is desired in this field of work. The aim of this thesis has been to develop a method to be close to the desired method as much as possible, especially in two important aspects, time and cost. The method which is the goal of this thesis should fulfill the below five requirements: 1. Able to produce a generic battery model for different types of lithium-ion batteries 2. No or low cost for the development of the model 3. A time span around one week for obtaining the model 4. Able to predict the most aspects of the battery’s behavior like the voltage, SOC, temperature and, preferably, simulate the degradation effects, safety and thermal aspects 5. Accuracy with less than 15% error The start point of this thesis was the study of current methods for cell modeling. Based on their approach, they are divided into three categories, abstract, black box and white box methods. Each of these methods has its own advantages and disadvantages, but none of them are able to fulfill the above requirements. This thesis presents a method, called “gray box”, which is, partially, a mix of the black and white boxes’ concepts. The gray box method uses values for model’s parameters from different sources. Firstly, some chemical/physical measurements like in the case of the white box method, secondly, some of the physical tests/experiments used in the case of the black box method and thirdly, information provided by cell datasheets, books, papers, journals and scientific databases. As practical part of this thesis, a prismatic cell, EIG C20 with 20Ah capacity was selected as the sample cell and its electrochemical model was produced with the proposed method. Some of the model’s parameters are measured and some others are estimated. Also, the abilities of AutoLion, a specialized software for lithium-ion battery modeling were used to accelerate the modeling process. Finally, the physical tests were used as part of the references for calculating the accuracy of the produced model. The results show that the gray box method can produce a model with nearly no cost, in less than one week and with error around 30% for the HPPC tests and, less than this, for the OCV and voltage tests. The proposed method could, largely, fulfill the five mentioned requirements. These results were achieved even without using any physical tests/experimental data for tuning the parameters, which is expected to reduce the error considerably. These are promising results for the idea of the gray box which is in its nascent stages and needs time to develop and be useful for commercial purposes.
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Chaiwan, Pramote. « NEW ACCURATE FAULT LOCATION ALGORITHM FOR PARALLEL TRANSMISSION LINES ». UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/813.

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Electric power systems have been in existence for over a century. Electric power transmission line systems play an important role in carrying electrical power to customers everywhere. The number of transmission lines in power systems is increasing as global demand for power has increased. Parallel transmission lines are widely used in the modern transmission system for higher reliability. The parallel lines method has economic and environmental advantages over single circuit. A fault that occurs on a power transmission line will cause long outage time if the fault location is not located as quickly as possible. The faster the fault location is found, the sooner the system can be restored and outage time can be reduced. The main focus of this research is to develop a new accurate fault location algorithm for parallel transmission lines to identify the fault location for long double-circuit transmission lines, taking into consideration mutual coupling impedance, mutual coupling admittance, and shunt capacitance of the line. In this research, the equivalent PI circuit based on a distributed parameter line model for positive, negative, and zero sequence networks have been constructed for system analysis during the fault. The new method uses only the voltage and current from one end of parallel lines to calculate the fault distance. This research approaches the problem by derivation all equations from positive sequence, negative sequence, and zero sequence network by using KVL and KCL. Then, the fault location is obtained by solving these equations. EMTP has been utilized to generate fault cases under various fault conditions with different fault locations, fault types and fault resistances. Then the algorithm is evaluated using the simulated data. The results have shown that the developed algorithm can achieve highly accurate estimates and is promising for practical applications.
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Robinson, Michael J. « Finite element calculation of equivalent circuit parameters for induction motors ». Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/8003.

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Susetyo, Budi. « Modélisation de l'impédance harmonique de charges agrégées ». Grenoble INPG, 1995. http://www.theses.fr/1995INPG0027.

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Les applications de l’électronique de puissance contribuent à la pollution harmonique des réseaux électriques. Pour estimer le niveau de distorsion de tension, les différents composants du réseau doivent être modélisés en régime harmonique, en particulier les charges consommatrices, industrielles, commerciales et domestiques. L’étude concerne la modélisation de l’impédance harmonique des charges qui peuvent être séparées en deux grandes catégories: les charges passives et les charges dites actives qui réalisent une conversion d’énergie électromécanique. Les modèles disponibles pour les charges élémentaires sont récapitules en termes de complexité et de précision. Puis une méthode d’agrégation est développée, permettant d'obtenir un circuit équivalent d'ordre minimal et de structure compatible avec celle du réseau. La méthode d'identification des paramètres de ce circuit est basée sur une représentation fréquentielle de l’impédance harmonique, afin d'obtenir une réponse qui coïncide avec celle du réseau réel. Ce modèle agrège est utilise pour étudier la sensibilité de l’impédance harmonique aux variations aléatoires des paramètres caractéristiques du réseau et des charges.
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Petrone, 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.

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2012 - 2013
Proton 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.

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This doctoral thesis is dedicated to the modeling and analysis of high-power multiphase electric machines. In the first part, the multiphase technology and variety in the field of high power electric drives and power generation is illustrated by means of some significant industrial realizations which highlight the main design issues and advantages that may lead to choose a high number of phases in large electric machinery. Subsequently, the attention is focused on the so called split-phase configurations, characterized by stator windings split into *N* three-phase sections. The modeling of these machines is revisited from an analytical viewpoint and an equivalent circuit representation is proposed for them; in particular, it is shown and experimentally proved that, when the number of stator sections *N* exceeds two, a magnetic cross-coupling arises between d-axis and q-axis equivalent circuits. A different modeling technique, called Vector-Space Decomposition (VSD), is then considered and extended to any kind of multiphase configuration, whether symmetrical or asymmetrical, through suitable geometrical transformations. A special effort is particularly spent on setting forth a general methodology which allows for space harmonics (related to the non-idealities of air-gap shape and winding distribution) to be included in the machine model through VSD. The result achieved is that some geometry- or design-related machine information which usually require finite-element simulations to be caught, can be successfully incorporated in the VSD lumped-parameter model of the *n*-phase machine, to an extent that is larger and larger as *n* grows. As an application example, it is shown how space harmonic effects in the operation of a six-phase and a nine-phase salient-pole multiphase machines can be reproduced by time-stepping finite-element analysis and by the proposed lumped-parameter methodology with the same level of accuracy but with a significant time and computational saving in the last mentioned case. A part of the thesis is also dedicated to model parameter calculation. Addressing the case of a general number and distribution of stator phases, algorithms are proposed to compute magnetizing parameters through the winding function theory and analytical computation methods are proposed for self and mutual leakage inductance parameters. The accuracy of the proposed computation method is assessed by comparison with measurements or real machines. The final part of the thesis is devoted to the study of two detailed phenomena which characterize high-power multiphase machines when supplied by multiple inverters. In the instance of multiple current-source inverters, a model is proposed and validated to describe commutation transients including the mutual interaction effects between different winding sections. In the instance of multiple voltage-source inverters, the low-frequency current circulation phenomenon is investigated analytically and experimentally showing how it arises due to the internal non-ideal machine structure.
Questa 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.
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Chapitres de livres sur le sujet "Equivalent circuit parameter"

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Li, Yuanyuan, Jiye Jiao, Yang Yang et Panting Ji. « Parameter Estimation of Equivalent Circuit Model for Lithium Batteries ». Dans Advances in Natural Computation, Fuzzy Systems and Knowledge Discovery, 41–49. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-89698-0_5.

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Li, Y. « A Hybrid Intelligent Computational Methodology for Semiconductor Device Equivalent Circuit Model Parameter Extraction ». Dans Scientific Computing in Electrical Engineering, 345–50. Berlin, Heidelberg : Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/978-3-540-32862-9_49.

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Huang, Haihong, YuHang Wang et Haixin Wang. « Research on Parameter Identification of Lithium Battery Equivalent Circuit Model Based on Recursive Gradient Correction Algorithm ». Dans Lecture Notes in Electrical Engineering, 153–61. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1532-1_17.

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Quang, Nguyen Phung, et Jörg-Andreas Dittrich. « Equivalent Circuits and Methods to Determine the System Parameters ». Dans Vector Control of Three-Phase AC Machines, 189–225. Berlin, Heidelberg : Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-46915-6_6.

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Garg, Priyanka, et Priyanka Jain. « Extraction of Equivalent Circuit Parameters of Metamaterial-Based Bandstop Filter ». Dans Advances in Intelligent Systems and Computing, 173–79. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1822-1_16.

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Luzi, Massimiliano, Maurizio Paschero, Antonello Rizzi et Fabio Massimo Frattale Mascioli. « An Improved PSO for Flexible Parameters Identification of Lithium Cells Equivalent Circuit Models ». Dans Neural Advances in Processing Nonlinear Dynamic Signals, 229–38. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95098-3_21.

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Ganguly, Sourish, Subhrasish Pal et Ankur Bhattacharjee. « Development of a Dynamic Battery Model and Estimation of Equivalent Electrical Circuit Parameters ». Dans Proceedings of the 7th International Conference on Advances in Energy Research, 481–91. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5955-6_45.

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Kolosok, I., et E. Korkina. « Refinement of Transmission Line Equivalent Circuit Parameters at Power System State Estimation by PMU Data ». Dans Lecture Notes in Electrical Engineering, 571–80. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39225-3_62.

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Fan, Luo, et Haihong Huang. « Comparative Study on Equivalent Circuit Model Parameters of EIS of Retired Lithium-Ion Power Batteries ». Dans Lecture Notes in Electrical Engineering, 187–95. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1532-1_21.

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Pazdera, Ivo, Petr Prochazka, Jiri Ctibor, Petr Hutak, Radoslav Cipin et Miroslav Patocka. « Induction Machine Models and Equivalent Circuits Based on Hybrid Parameters of Two-Port Network ». Dans Advances in Intelligent Systems and Computing, 202–10. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-65960-2_26.

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Actes de conférences sur le sujet "Equivalent circuit parameter"

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Hines, J. H., et D. C. Malocha. « A simple transducer equivalent circuit parameter extraction technique ». Dans 1993 IEEE Ultasonics Symposium. IEEE, 1993. http://dx.doi.org/10.1109/ultsym.1993.339683.

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Feyzi, M., et Mehran Sabahi. « Online Dynamic Parameter Estimation of Transformer Equivalent Circuit ». Dans 2006 5th International Power Electronics and Motion Control Conference. IEEE, 2006. http://dx.doi.org/10.1109/ipemc.2006.297265.

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Feyzi, M. Reza, et Mehran Sabahi. « Online Dynamic Parameter Estimation of Transformer Equivalent Circuit ». Dans 2006 5th International Power Electronics and Motion Control Conference (IPEMC 2006). IEEE, 2006. http://dx.doi.org/10.1109/ipemc.2006.4778186.

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Forrester, Jack, Jonathan Davidson, Martin Foster et David Stone. « Equivalent Circuit Parameter Extraction Methods for Piezoelectric Transformers ». Dans 2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe). IEEE, 2019. http://dx.doi.org/10.23919/epe.2019.8915189.

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Liu, Fuyu, Xiju Zong et Su Li. « Parameter identification of second order equivalent circuit of thyristor ». Dans 2021 IEEE 2nd International Conference on Information Technology, Big Data and Artificial Intelligence (ICIBA). IEEE, 2021. http://dx.doi.org/10.1109/iciba52610.2021.9687863.

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Wang, Jianliang, Yihuang Zhang et Jinze Li. « The Separation Method for the Equivalent Circuit Parameter of DFIG ». Dans 2011 Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2011. http://dx.doi.org/10.1109/appeec.2011.5748634.

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Jiang, Shugang. « A Parameter Identification Method for a Battery Equivalent Circuit Model ». Dans SAE 2011 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 2011. http://dx.doi.org/10.4271/2011-01-1367.

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Shicong Ma, Bingyin Xu, Zhiqian Bo et A. Klimek. « The research on lumped parameter equivalent circuit of transmission line ». Dans 8th International Conference on Advances in Power System Control, Operation and Management (APSCOM 2009). IET, 2009. http://dx.doi.org/10.1049/cp.2009.1820.

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Angelov, G. V., M. H. Hristov, O. J. Antonova et E. D. Gadjeva. « Parameter Extraction for Simplified RF NMOSFET Equivalent Circuit using Spice ». Dans 2007 14th International Conference on Mixed Design of Integrated Circuits and Systems. IEEE, 2007. http://dx.doi.org/10.1109/mixdes.2007.4286205.

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Ewald, Thomas. « Frequency-Dependent Equivalent Circuit Parameter Calculation of Gapped Multiwinding Inductors ». Dans 2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia). IEEE, 2022. http://dx.doi.org/10.23919/ipec-himeji2022-ecce53331.2022.9806881.

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Rapports d'organisations sur le sujet "Equivalent circuit parameter"

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Chovnyuk, Yuriy, Michail Dikterjuk, Vladimir Kravchjuk et Olga Ostapuschenko. Substantiation of equivalent circuits for the calculation of parameters of the optimal start-ing of the load-lifting crane mechanism for the minimization of ropes tension during load lift-ing with the help of various manners. Gіrnichі, budіvelnі, dorozhnі ta melіorativnі mashini, avril 2019. http://dx.doi.org/10.31493/gbdmm1892.0102.

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