Relevant bibliographies by topics / Equivalent circuit method

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Academic literature on the topic 'Equivalent circuit method'

Author: Grafiati
Published: 3 June 2025
Last updated: 22 June 2025

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Journal articles on the topic "Equivalent circuit method"

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Pan, Zhong Liang, and Ling Chen. "A New Verification Method of Digital Circuits Based on Cone-Oriented Partitioning and Decision Diagrams." Applied Mechanics and Materials 29-32 (August 2010): 1040–45. http://dx.doi.org/10.4028/www.scientific.net/amm.29-32.1040.

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The formal verification is able to check whether the implementation of a circuit design is functionally equivalent to an earlier version described at the same level of abstraction, it can show the correctness of a circuit design. A new circuit verification method based on cone-oriented circuit partitioning and decision diagrams is presented in this paper. First of all, the structure level of every signal line in a circuit is computed. Secondly, the circuit is partitioned into a lot of cone structures. The multiple-valued decision diagram corresponding to every cone structure is generated. The verification procedure is to compare the equivalence of the multiple-valued decision diagrams of two types of cone structures. Experimental results on a lot of benchmark circuits show the method presented in this paper can effectively perform the equivalence checking of circuits.
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Aminu, M., M. Abana, S. W. Pallam, and 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 (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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Tuethong, Piyapon, Peerawut Yutthagowith, and Anantawat Kunakorn. "Effective Simulation Approach for Lightning Impulse Voltage Tests of Reactor and Transformer Windings." Energies 13, no. 20 (2020): 5399. http://dx.doi.org/10.3390/en13205399.

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In this paper, an effective simulation method for lightning impulse voltage tests of reactor and transformer windings is presented. The method is started from the determination of the realized equivalent circuit of the considered winding in the wide frequency range from 10 Hz to 10 MHz. From the determined equivalent circuit and with the use of the circuit simulator, the circuit parameters in the impulse generator circuit are adjusted to obtain the waveform parameters according to the standard requirement. The realized equivalent circuits of windings for impulse voltage tests have been identified. The identification approach starts from equivalent circuit determination based on a vector fitting algorithm. However, the vector fitting algorithm with the equivalent circuit extraction is not guaranteed to obtain the realized equivalent circuit. From the equivalent circuit, it is possible that there are some negative parameters of resistance, inductance, and capacitance. Using such circuit parameters from the vector fitting approach as the beginning circuit parameters, a genetic algorithm is employed for searching equivalent circuit parameters with the constraints of positive values. The realized equivalent circuits of the windings can be determined. The validity of the combined algorithm is confirmed by comparison of the simulated results by the determined circuit model and the experimental results, and good agreement is observed. The proposed approach is very useful in lightning impulse tests on the reactor and transformer windings.
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Liu, Tao, Le Xu, Yao He, et al. "A Novel Simulation Method for Analyzing Diode Electrical Characteristics Based on Neural Networks." Electronics 10, no. 19 (2021): 2337. http://dx.doi.org/10.3390/electronics10192337.

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Based on the equivalent circuit model and physical model, a new method for analyzing diode electrical characteristics based on a neural network model is proposed in this paper. Although the equivalent circuit model is widely used, it cannot effectively reflect the working state of diode circuits under the conditions of large injection and high frequency. The analysis method based on physical models developed in recent years can effectively resolve the above shortcomings, but it faces the problem of a low simulation efficiency. Therefore, the physical model method based on neural network acceleration is used to improve the traditional, equivalent circuit model. The results obtained from the equivalent circuit model and the physical model are analyzed using the finite-difference time-domain method. The diode model based on a neural network is fitted with training data obtained from the results of the physical model, then it is summarized into a voltage–current equation and used to improve the traditional, equivalent circuit method. In this way, the improved equivalent circuit method can be used to analyze the working state of a diode circuit under large injection and high frequency conditions. The effectiveness of the proposed model is verified by some examples.
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Jang, Jejin, Jaehyuk Choi, Donghun Lee, and Hyungsoo Mok. "Estimation Method of an Electrical Equivalent Circuit for Sonar Transducer Impedance Characteristic of Multiple Resonance." Sensors 23, no. 14 (2023): 6636. http://dx.doi.org/10.3390/s23146636.

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Improving the operational efficiency and optimizing the design of sound navigation and ranging (sonar) systems require accurate electrical equivalent models within the operating frequency range. The power conversion system within the sonar system increases power efficiency through impedance-matching circuits. Impedance matching is used to enhance the power transmission efficiency of the sonar system. Therefore, to increase the efficiency of the sonar system, an electrical-matching circuit is employed, and this necessitates an accurate equivalent circuit for the sonar transducer within the operating frequency range. In conventional equivalent circuit derivation methods, errors occur because they utilize the same number of RLC branches as the resonant frequency of the sonar transducer, based on its physical properties. Hence, this paper proposes an algorithm for deriving an equivalent circuit independent of resonance by employing multiple electrical components and particle swarm optimization (PSO). A comparative verification was also performed between the proposed and existing approaches using the Butterworth–van Dyke (BVD) model, which is a method for deriving electrical equivalent circuits.
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Policastro, Steven A., Rachel M. Anderson, Carlos M. Hangarter, Attilio Arcari, and Erick B. Iezzi. "Incorporating Physics-Based Models into Equivalent Circuit Analysis of EIS Data from Organic Coatings." Coatings 13, no. 7 (2023): 1285. http://dx.doi.org/10.3390/coatings13071285.

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Electrochemical impedance spectroscopy (EIS) is a widely used method for monitoring coatings because it can be done in situ and causes little damage to the coating. However, interpreting the impedance data from coatings in order to determine the state of the coating and its protective abilities is challenging. A modified version of the rapid electrochemical assessment of paint (REAP) equivalent circuit is developed here, along with a method to calculate the impedance of a circuit using matrix algebra. This new equivalent circuit and the calculation method are used to analyze EIS data obtained from a two-layer commercial organic coating system immersed in NaCl solutions with different concentrations and at different temperatures. The matrix calculation method is validated by comparing results obtained from commercial analysis software to this method for two different equivalent circuits, and the parameter values are nearly equal. Physics-based models of the equivalent circuit elements are derived and used to obtain both initial estimates for the regressions and physics-based constraints on the model parameters. These models are integrated into the regression procedure, and the corrected Akaike information criterion (AICc) is used to compare fits between the new circuit and classic equivalent circuits. The AICc values indicate the new circuit results in better fits than classic equivalent circuits used for coatings analysis.
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Lines, Christopher R., Willem A. Cronjé, and Brian Wigdorowitz. "Extended 2D magnetic equivalent circuit method." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 29, no. 6 (2010): 1435–43. http://dx.doi.org/10.1108/03321641011078508.

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YAN, ZHAN-YUAN, JIN-YING MA, and XIAO-HONG ZHANG. "QUANTIZATION OF MESOSCOPIC QUARTZ PIEZOELECTRIC CRYSTAL EQUIVALENT CIRCUIT." Modern Physics Letters B 25, no. 11 (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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Атамась, Артем Іванович, Ірина Андріївна Сліпухіна, Ігор Станіславович Чернецький, and Юрій Сергійович Шиховцев. "IMPLEMENTATION OF THE EQUIVALENT CIRCUIT METHOD IN INSTRUMENTAL DIGITAL DIDACTICS." Information Technologies and Learning Tools 82, no. 2 (2021): 1–17. http://dx.doi.org/10.33407/itlt.v82i2.4069.

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Instrumental digital didactics is based on the use of various digital means of obtaining, processing, and interpreting empirical data in accordance with the logic of scientific method and engineering design. Appropriate teaching techniques reflect the STEM approach to teaching natural science and engineering subjects. The use of the equivalent circuit created on the NI Multisim platform to investigate the characteristics of electric circuits’ components creates favorable didactic conditions. The methodological approaches proposed by the authors are demonstrated by the examples of determining the parameters of technologically advanced devices - photoelectric converter (for example, determining its maximum power point, as well as Fill Factor) and supercapacitor (for example, designating changes in charging and discharging characteristics depending on the type of construction). In such educational projects the parameters of the circuit components obtained by the equivalent circuit method are compared with the specifications of commercial devices available on the market. This approach, on the one hand, demonstrates statistical errors of results to the students, and on the other hand, it is a source of sufficient data for constructing an equivalent circuit of devices without prior experimental research. It is shown that the use of equivalent circuits in a computer simulation environment to replace real electronic and electrical devices, measuring systems and equipment with their virtual counterparts expands the didactic possibilities. Techniques based on the versatile use of digital didactic tools are being actively developed and implemented in the MANLab STEM-laboratory of the National Centre “Junior Academy of Sciences of Ukraine”.
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Kim, Sanghyun, Won-Sang Yoon, Jongsik Lim, and Sang-Min Han. "Accurate Microwave Circuit Co-Simulation Method Based on Simplified Equivalent Circuit Modeling." Micromachines 14, no. 10 (2023): 1847. http://dx.doi.org/10.3390/mi14101847.

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A new co-simulation method is proposed for active devices and electromagnetic resonant circuits at microwave frequency range. For the measured and extracted device parameters, three steps of equivalent circuit models are processed of the general, simplified, and EM RLC models. To overcome the limited lumped element simulation in an electromagnetic simulator, the simplified equivalent circuit model is established by mathematical computation. The co-simulation procedures are described and experimentally verified for commercial diodes. The application circuit is designed and implemented using the proposed co-simulation method. The experimental results verify that design using the proposed co-simulated method presented excellent agreement for a wideband frequency range of 0–4 GHz, compared with that using a conventional design method. The proposed co-simulation method can be applied to any commercial EM simulation tools without active model error.
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Dissertations / Theses on the topic "Equivalent circuit method"

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Ekman, Jonas. "Electromagnetic modeling using the partial element equivalent circuit method." Doctoral thesis, Luleå, 2003. http://epubl.luth.se/1402-1544/2003/27.

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Lau, Mark C. "Small Signal Equivalent Circuit Extraction From A Gallium Arsenide MESFET Device." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/36952.

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The development of microwave Gallium Arsenide Metal Semiconductor Field Effect Transistor (MESFET) devices has enabled the miniaturization of pagers, cellular phones, and other electronic devices. With these MESFET devices comes the need to model them. This thesis extracts a small signal equivalent circuit model from a Gallium Arsenide MESFET device. The approach taken in this thesis is to use measured S- parameters to extract a small signal equivalent circuit model by optimization. Small signal models and S-parameters are explained. The Simplex Method is used to optimize the small signal equivalent circuit model. A thorough analysis of the strengths and weaknesses of the Simplex method is performed.<br>Master of Science
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Ekman, Jonas. "The partial element equivalent circuit method : modeling and experimental verification of PCB structures." Licentiate thesis, Luleå tekniska universitet, EISLAB, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18244.

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To help products comply with international Electromagnetic Compatibility (EMC)regulations or as a help in a design process numerical simulation of electromagnetic (EM) characteristics are a valuable tool. With the development of high-speed computers the complexity of EM simulation programs and the systems they can simulate has increased considerable. But still, problems must be partitioned due to computer resource and/or EM simulation technique limitations. In this thesis, four different EM simulation techniques are described and the nature of these are discussed. The focus is on the partial element equivalent circuit (PEEC) method for which the following improvements and investigations have been proposed in the enclosed papers. First, a recent proposed formulation for the direct simulation of the radiated electric field from a device is compared against traditional post-processing equations and measurements. The results show that the proposed direct method, the electric field sensor, is unreliable for arbitrarily implementations since the length of the sensor strongly affects the results. Second, a technique to obtain simplified PEEC models are presented. The first step is to use a discretisation procedure where partial elements with small effect on the complete PEEC model are excluded. Then, instead of using numerical integration, closed-form equations are used to calculate the partial elements. The obtained simplified PEEC models are shown to comply well against measurements. Third, an introductory paper to the PEEC method is presented. The international interest for the method has been gaining rapidly for the past years resulting in considerable progress for the technique. But, in the Nordic countries the research effort has been low. The paper presents the technique using simple antenna examples, both printed and free space, and illustrations. For verification, simulations have been compared against analytical solutions and measurements.<br>Godkänd; 2001; 20070314 (ysko)
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Leinonen, M. (Mikko). "Finite element method and equivalent circuit based design of piezoelectric actuators and energy harvester dynamics." Doctoral thesis, Oulun yliopisto, 2015. http://urn.fi/urn:isbn:9789526208374.

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Abstract The main objective of this thesis was to use and combine Finite Element Method (FEM) and small signal equivalent circuit models in actuator and energy harvesting design and to study the dynamics of the said designs. The work is divided into four different sections. In the first section, the small signal parameters are derived for a pre-stressed piezoelectric actuator using a series of measurements. In addition, the tunability of the resonance frequency using mass and series capacitors is investigated. In the second section, a piezoelectric Fabry Perot Interferometer actuator is simulated using FEM and the small signal parameters are derived using FEM simulations. The modelled results are compared with the actual measurements and the resonance frequency is found to differ by only 0.8 percent from the measured values when the mirror is attached to the actuator. In the third section a piezoelectric wide band energy harvester is developed with multiple beam topology. Two different designs are compared, one produced using the conventional PZT-steel structure and one with a PZT-LTCC structure. The final section presents an FEM model for a shoe mounted energy harvester and concentrates on the modelling of walking dynamics in FEM. The simulation results are compared to actual measurements and the simulated power values are found to differ by only 7% when the cymbal stroke is below 1.3 mm. The generated model is also expandable to other types of energy harvesters and the methods developed can be used in a variety of different energy harvesting simulations and harvester development. The results show that the equivalent circuit approach together with FEM modelling is a powerful tool in the dynamics design of piezoelectric actuators and energy harvesters<br>Tiivistelmä Väitöstyön päätavoitteena oli yhdistää elementtimenetelmät (FEM) ja piensignaalimallit aktuaattorien ja energiankorjuukomponenttien suunnittelussa ja tutkia niiden dynamiikkaa. Työ on jaettu neljään eri osaan. Ensimmäisessä osassa piensignaalimallit johdettiin pietsosähköisestä aktuaattorista mittausten avulla. Lisäksi resonanssitaajuuden muuttamista tutkitaan massan ja sarjaan kytketyn kapasitanssin avulla. Toisessa osassa simuloidaan pietsosähköistä Fabry Perot interferometria käyttäen elementtimenetelmää. Lisäksi komponentin piensignaalimalli luodaan käyttäen simulointimallia. Lopuksi piensignaalimallin ja prototyypin mittaustuloksia verrataan. Mallin resonanssitaajuus poikkeaa mitatusta vain 0.8 %, kun aktuaattoriin on kiinnitetty peili. Kolmannessa osassa kehitetään ja verrataan toisiinsa kahta erilaista laajakaistaista monipalkkista pietsosähköistä energian korjuukomponenttia. Toinen komponenteista on toteutettu perinteisellä PZT-teräs rakenteella ja toinen yhteissintratulla PZT-LTCC rakenteella. Viimeisessä osassa luodaan simulaatio malli kenkään asennetulle cymbal tyyppiselle pietsosähköiselle energian korjuukomponentille ja kävelyn dynamiikkaa tutkitaan. Luotua mallia verrataan prototyypin mittaustuloksiin ja simuloitu energian tuotto poikkeaa vain 7 % alle 1.3 mm puristusliikkeellä. Tulokset osoittivat, että piensignaalimallin ja elementtimenetelmän yhdistäminen on tehokas apu pietsosähköisten aktuaattorien ja energiankorjuukomponenttien dynamiikan suunnittelussa
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Sugden, Frank Daniel. "A NOVEL DUAL MODELING METHOD FOR CHARACTERIZING HUMAN NERVE FIBER ACTIVATION." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1318.

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Presented in this work is the investigation and successful illustration of a coupled model of the human nerve fiber. SPICE netlist code was utilized to describe the electrical properties of the human nervous membrane in tandem with COMSOL Multiphysics, a finite element analysis software tool. The initial research concentrated on the utilization of the Hodgkin-Huxley electrical circuit representation of the nerve fiber membrane. Further development of the project identified the need for a linear circuit model that more closely resembled the McNeal linearization model augmented by the work of Szlavik which better facilitated the coupling of both SPICE and COMSOL programs. Related literature was investigated and applied to validate the model. This combination of analysis tools allowed for the presentation of a consistent model and revealed that a coupled model produced not only a qualitatively comparable, but also a quantitatively comparable result to studies presented in the literature. All potential profiles produced during the simulation were compared against the literature in order to meet the purpose of presenting an advanced computational model of human neural recruitment and excitation. It was demonstrated through this process that the correct usage of neuron models within a two dimensional conductive space did allow for the approximate modeling of human neural electrical characteristics.
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Boussetta, Chokri. "Modélisation électromagnétique des interconnexions en micro-onde et en logique rapide." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0153.

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La modelisation electromagnetique est un outil tres important dans l'amelioration des performances des circuits logiques rapides. La haute densite d'integration et la diminution du temps de montee necessite l'utilisation des cao de plus en plus performants. Ces outils doivent integrer une caracterisation precise des interconnexions, et plus particulierement des discontinuites. Parmi les differents methodes de caracterisation et de modelisation en hyperfrequence qui ont ete developpes, nous avons choisi la methode tlm. Nous avons mis au point un logiciel d'extraction des elements des schemas equivalents des discontinuites facilement integrables dans les logiciels de cao (spice, mds,). Nous avons applique notre methodologie a la modelisation de quelques discontinuites (coude, via, croissement,) sur une bande de 20 ghz. Nous avons confronte nos resultats a des resultats publies dans la litterature, ainsi qu'a des resultats de mesures. Ces comparaisons nous ont ainsi permis de valider le principe de modelisation que nous avons developpe
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Martinho, Lucas Blattner. "Numerical modeling of electromagnetic coupling phenomena in the vicinities of overhead power transmission lines." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-28062016-152807/.

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Les phénomènes de couplage électromagnétique entre les lignes aé- riennes de transmission d\'énergie et des structures voisines sont inévitables, surtout dans les zones densément peuplées. Les effets indésirables découlants de cette proximité sont variés, allant de l\'établissement des tensions dangereuses à l\'apparition de phénomènes de corrosion dus au courant alternatif. L\'étude de cette classe de problèmes est nécessaire pour assurer la sécurité dans les alentours de la zone d\'interaction et aussi pour préserver l\'intégrité des équipements et des dispositifs présents. Cependant, la modélisation compl ète de ce type d\'application implique la représentation tridimensionnelle de la région d\'intérêt et nécessite des méthodes numériques de calcul de champs spécifiques. Dans ces travaux, des problèmes liés à la circulation de courants électriques dans le sol (ou de couplage dit conductif) seront abordés avec la méthode des éléments finis. D\'autres problèmes résultants de la variation temporelle des champs électromagnétiques (ou de couplage dit inductif) seront aussi considérés et traités avec la méthode PEEC (Partial Element Equivalent Circuit) généralisée. Plus précisément, une condition limite particulière sur le potentiel électrique est proposée pour tronquer le domaine de calcul dans l\'analyse par éléments finis des problèmes de couplage conductif et une formulation PEEC complète pour la modélisation de problèmes de couplage inductif est présentée. Des con gurations tests de complexités croissantes sont considérées pour valider les approches précédentes. Ces travaux visent ainsi à apporter une contribution à la modélisation de cette classe de problèmes, qui tendent à devenir communs avec l\'expansion des réseaux électriques.<br>Electromagnetic coupling phenomena between overhead power transmission lines and other nearby structures are inevitable, especially in densely populated areas. The undesired effects resulting from this proximity are manifold and range from the establishment of hazardous potentials to the outbreak of alternate current corrosion phenomena. The study of this class of problems is necessary for ensuring security in the vicinities of the interaction zone and also to preserve the integrity of the equipment and of the devices there present. However, the complete modeling of this type of application requires the three- -dimensional representation of the region of interest and needs specific numerical methods for field computation. In this work, the modeling of problems arising from the flow of electrical currents in the ground (the so-called conductive coupling) will be addressed with the finite element method. Those resulting from the time variation of the electromagnetic fields (the so-called inductive coupling) will be considered as well, and they will be treated with the generalized PEEC (Partial Element Equivalent Circuit) method. More specifically, a special boundary condition on the electric potential is proposed for truncating the computational domain in the finite element analysis of conductive coupling problems, and a complete PEEC formulation for modeling inductive coupling problems is presented. Test configurations of increasing complexities are considered for validating the foregoing approaches. These works aim to provide a contribution to the modeling of this class of problems, which tend to become common with the expansion of power grids.
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Sahraoui, Omar. "Calcul des paramètres du schéma équivalent de la machine asynchrone par la méthode des éléments finis." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0056.

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Depuis son invention par Tesla, au siècle dernier, la machine asynchrone s'est imposée dans l'industrie grâce à sa robustesse, sa fiabilité et son coût faible. Avec le développement de l'électronique de puissance et de la commande vectorielle ces dernières années, elle est devenue compétitive dans le domaine de la vitesse variable. Il existe principalement deux approches différentes pour l'étude de la machine asynchrone : le schéma équivalent et la méthode des éléments finis. Les méthodes classiques de détermination des paramètres des éléments finis (f. E. M. ) est plus précise car elle permet de prendre en compte des phénomènes complexes tels que la saturation et l'effet de peau dans la machine, mais exige généralement des moyens et des temps de calcul importants. Pour combiner les deux approches ci-dessus, nous avons abordé, au cours de notre travail, le problème de la détermination des paramètres du schéma équivalent de la machine asynchrone par la méthode des éléments finis. Ainsi nous obtenons un schéma équivalent précis et facile à mettre en leurre. Pour ceci, nous avons développé plusieurs méthodes parmi lesquelles on peut citer : - La méthode du diagramme vectoriel qui se base sur les équations classiques de la machine en régime permanent. Cette méthode permet de mettre en évidence la variation des paramètres du schéma équivalent avec les conditions de fonctionnement de la machine. - La méthode de l'essai fréquentiel à l'arrêt (Standstill Frequency Response, SSFR) qui permet de modéliser finement l'effet de peau dans la machine, et de déterminer les constantes de temps électriques, très importantes dans l'étude du comportement dynamique de la machine. La validation de ces méthodes a été faite sur une machine asynchrone à structure inversée (cage au stator). Les résultats de calcul sont en bon accord avec les mesures
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Martinson, Christiaan Adolph. "Characterisation of a PEM electrolyser using the current interrupt method / Christiaan Adolph Martinson." Thesis, North-West University, 2012. http://hdl.handle.net/10394/8741.

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The need to characterise a PEM electrolyser is motivated by a South African hydrogen company. One of two electrochemical characterisation methods, namely the current interrupt method or electrochemical impedance spectroscopy, is investigated to characterise the PEM electrolyser. Various literature sources can be found on the electrochemical characterisation methods. In this study the current interrupt method is used for the electrochemical characterisation of a PEM electrolyser. The current interrupt method is an electrical test method that will be used to obtain an equivalent electric circuit model of the PEM electrolyser. The equivalent electric circuit model relates to various electrochemical characteristics such as the activation losses, the ohmic losses and the concentration losses. Two variants of the current interrupt method, namely the natural voltage response method and the current switching method, are presented. These methods are used to obtain two different equivalent electric circuit models of the PEM electrolyser. The parameters of the first equivalent electric circuit, namely the Randles cell, will be estimated with the natural voltage response method. The parameters of the second equivalent electric circuit, namely the Randles-Warburg cell, will be estimated with the current switching method. Simulation models of the equivalent electric circuits are developed and tested. The simulation models are used to verify and validate the natural voltage response method and the current switching method. The parameters of the Randles cell simulation model is accurately calculated with the natural voltage response method. The parameters of the Randles-Warburg cell simulation model is accurately calculated with the current switching method. The natural voltage response method and the current switching method are also practically implemented. The results is used to indicate the various electrochemical characteristics of the PEM electrolyser. A Nafion 117 type membrane was tested with the current interrupt method. The membrane resistance parameters of Randles cell were estimated with the natural voltage response method. These values are validated with conductivity measurements found in literature. The results of the Randles- Warburg cell is validated with a system identification validation model.<br>Thesis (MIng (Computer and Electronic Engineering))--North-West University, Potchefstroom Campus, 2013
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Martinho, Lucas Blattner. "Modélisation numérique des phénomènes de couplage électromagnétique dans les alentours des lignes aériennes de transmission d'énergie." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT030/document.

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Les phénomènes de couplage électromagnétique entre les lignes aériennes de transmission d'énergie et des structures voisines sont inévitables, surtout dans les zones densément peuplées. Les effets indésirables découlants de cette proximité sont variés, allant de l'établissement des tensions dangereuses à l'apparition de phénomènes de corrosion dus au courant alternatif. L'étude de cette classe de problèmes est nécessaire pour assurer la sécurité dans les alentours de la zone d'interaction et aussi pour préserver l'intégrité des équipements et des dispositifs présents. Cependant, la modélisation complète de ce type d'application implique la représentation tridimensionnelle de la région d'intérêt et nécessite des méthodes numériques de calcul de champs spécifiques. Dans ces travaux, des problèmes liés à la circulation de courants électriques dans le sol (ou de couplage dit conductif) seront abordés avec la méthode des éléments finis. D'autres problèmes résultants de la variation temporelle des champs électromagnétiques (ou de couplage dit inductif) seront aussi considérés et traités avec la méthode PEEC (Partial Element Equivalent Circuit) généralisée. Plus précisément, une condition limite particulière sur le potentiel électrique est proposée pour tronquer le domaine de calcul dans l'analyse par éléments finis des problèmes de couplage conductif et une formulation PEEC complète pour la modélisation de problèmes de couplage inductif est présentée. Des configurations tests de complexités croissantes sont considérées pour valider les approches précédentes. Ces travaux visent ainsi à apporter une contribution à la modélisation de cette classe de problèmes, qui tendent à devenir communs avec l'expansion des réseaux électriques<br>Electromagnetic coupling phenomena between overhead power transmission lines and other nearby structures are inevitable, especially in densely populated areas. The undesired effects resulting from this proximity are manifold and range from the establishment of hazardous potentials to the outbreak of alternate current corrosion phenomena. The study of this class of problems is necessary for ensuring security in the vicinities of the interaction zone and also to preserve the integrity of equipment and devices there present. However, the complete modeling of this type of application requires the three-dimensional representation of the region of interest and needs specific numerical methods for field computation. In this work, the modeling of problems arising from the flow of electrical currents in the ground (the so-called conductive coupling) will be addressed with the finite element method. Those resulting from the time variation of the electromagnetic fields (the so-called inductive coupling) will be considered as well, and they will be treated with the generalized PEEC (Partial Element Equivalent Circuit) method. More specifically, a special boundary condition on the electric potential is proposed for truncating the computational domain in the finite element analysis of conductive coupling problems, and a complete PEEC formulation for modeling inductive coupling problems is presented. Test configurations of increasing complexities are considered for validating the foregoing approaches. These works aim to provide a contribution to the modeling of this class of problems, which tend to become common with the expansion of power grids<br>Fenômenos de acoplamento eletromagnético entre linhas aéreas de transmissão de energia e outras estruturas vizinhas são inevitáveis, sobretudo emáreas densamente povoadas. Os efeitos indesejados decorrentes desta proximidadesão variados, indo desde o estabelecimento de potenciais perigosos até o surgimento de processos de corrosão por corrente alternada. O estudo desta classe de problemas é necessária para a garantia da segurança nas imediações da zona de interação e também para se preservar a integridade de equipamentos e dispositivos ali presentes. Entretanto, a modelagem completa deste tipo de aplicação requer a representação tridimensional da região de interesse e necessita de métodos numéricos de cálculo de campos específicos. Neste trabalho, serão abordadas as modelagens de problemas decorrentes da circulação de correntes elétricas no solo (ditos de acoplamentocondutivo) com o método dos elementos finitos. Também serão considerados problemas produzidos pela variação temporal dos campos eletromagnéticos (ditos de acoplamento indutivo), que serão tratados com o método PEEC(Partial Element Equivalent Circuit) generalizado. Mais especificamente, uma condição de contorno particular sobre o potencial elétrico é proposta para o truncamento do domínio de cálculo na análise de problemas de acoplamento condutivo com o método dos elementos finitos, e uma formulação completa tipo PEEC para a modelagem de problemas de acoplamento indutivo é apresentada. Problemas teste de complexidades crescentes são considerados para a validação das abordagens precedentes. Estes trabalhos visam fornecer desta forma uma contribuição à modelagem desta classe de problemas, que tendem a se tornar comuns com a expansão das redes elétricas
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Books on the topic "Equivalent circuit method"

1

George C. Marshall Space Flight Center., ed. Equivalent circuit models for AC impedance data analysis. National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1990.

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Nitsch, Jürgen, Frank Gronwald, and Günter Wollenberg. Radiating Nonuniform Transmissionline Systems and the Partial Element Equivalent Circuit Method. John Wiley & Sons, Ltd, 2009. http://dx.doi.org/10.1002/9780470682425.

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Nitsch, Jürgen. Radiating non-uniform transmission line systems and the partial element equivalent circuit method. J. Wiley, 2009.

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Nitsch, Jürgen. Radiating non-uniform transmission line systems and the partial element equivalent circuit method. J. Wiley, 2009.

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Nitsch, Jürgen. Radiating non-uniform transmission line systems and the partial element equivalent circuit method. J. Wiley, 2009.

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Molitor, Paul. Equivalence checking of digital circuits: Fundamentals, principles, methods. Kluwer Academic Publishers, 2004.

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Nitsch, Prof, Prof Wollenberg, Juergen Nitsch, and Frank Gronwald. Radiating Nonuniform Transmission-Line Systems and the Partial Element Equivalent Circuit Method. Wiley & Sons, Incorporated, John, 2009.

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Nitsch, Juergen, Gunter Wollenberg, and Frank Gronwald. Radiating Nonuniform Transmission-Line Systems and the Partial Element Equivalent Circuit Method. Wiley & Sons, Limited, John, 2009.

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Nitsch, Juergen, Gunter Wollenberg, and Frank Gronwald. Radiating Nonuniform Transmission-Line Systems and the Partial Element Equivalent Circuit Method. Wiley & Sons, Incorporated, John, 2009.

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Plett, Gregory L. Battery Management Systems, Volume II: Equivalent-Circuit Methods. Artech House, 2020.

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Book chapters on the topic "Equivalent circuit method"

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Zheng, Yang, Wushuang Liu, Xuan Zhou, Wanying Liu, and Qijuan Chen. "Complex Frequency-Domain Oscillation Analysis of the Pumped-Storage Systems." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2532-2_37.

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AbstractHydraulic impedance, as an efficient frequency-domain analysis alternative, has been widely utilized in hydraulic transient analysis for decades. Since the mathematical expressions of hydraulic systems with complicated pipe networks are usually rather complex, it is difficult for the traditional continuous impedance method to obtain the analytical solutions to the system’s frequency responses directly. Therefore, an equivalent circuit modeling-based discrete impedance method is proposed to mathematically express the hydraulic systems of a pumped storage plant system with complicated pipe networks. Through drawing an analogy between various hydraulic facilities and different types of electrical circuits, the equivalent circuit topology of any hydraulic system can be obtained according to the circuit theory in electrical engineering. The oscillation analysis of the pumped-storage power plant is conducted, and influences of the pump-turbine impedance on the system’s oscillation characteristics have been discussed.
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Laksar, Jan, Pavel Svetlik, and Lukas Veg. "Equivalent Magnetic Circuit Method Usage in the Synchronous Reluctance Machine Rotor Design." In Advances in Intelligent Systems and Computing. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-65960-2_31.

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De Gersem, Herbert, Stefan Vandewalle, and Kay Hameyer. "A Finite-Element/Equivalent-Circuit Two-Level Method for Magnetic Field Simulations." In Lecture Notes in Computational Science and Engineering. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-58312-4_9.

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Liao, Kun-ming, Yi-qiang Wu, Chen Qian, and Guo-ping Du. "An Accurate Equivalent Circuit Method of Open Ended Coaxial Probe for Measuring the Permittivity of Materials." In Lecture Notes in Electrical Engineering. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21747-0_100.

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Wang, Zhenyu, Xu Wang, Yanchao Liu, Huichun Zhao, and Xiaoyi Zhu. "Research on the Construction Method of Equivalent-Circuit Model Library of Multi-Type Energy Storage Battery." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2024. https://doi.org/10.1007/978-981-97-8824-8_14.

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Fadlaoui, Elmahdi, Hamza Hboub, and Noureddine Masaif. "Offline Parameter Identification of the Battery Equivalent Circuit Model for Electric Vehicles Using Particle Swarm Optimization Method." In International Conference on Advanced Intelligent Systems for Sustainable Development. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-35245-4_25.

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Jiang, Meihui, Jiawei Yi, Dongdong Zhang, Xinzhi Guo, and Qiang Qin. "An Analytical Core Loss Admittance Calculating Method and an Equivalent Circuit Modeling Method of Induction Motors Fed by Converter Considering Space-Time Harmonics." In The Proceedings of the 9th Frontier Academic Forum of Electrical Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6609-1_75.

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Yu, Chuanxiang, Rui Huang, and Yingjian Zhang. "Online Identification of Lithium Battery Equivalent Circuit Model Parameters Based on a Variable Forgetting Factor Recursive Least Square Method." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1532-1_136.

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Osama, Muhammad, Dimitrios Thanos, and Alfons Laarman. "Parallel Equivalence Checking of Stabilizer Quantum Circuits on GPUs." In Lecture Notes in Computer Science. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-90660-2_6.

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Abstract Equivalence checking plays a crucial role in quantum circuit compilation, optimization, and verification. Stabilizer circuits can be simulated classically by tracking the so-called stabilizer operators in linear time. But the simulation of large stabilizer circuits with thousands of qubits and gates, arising e.g. in the study of novel quantum error-correction protocols, still poses a challenge. In this work, we propose a GPU-based deterministic algorithm for equivalence checking of stabilizer circuits using the stabilizer tableau formalism. We explore various design choices and implement the most efficient version. Our algorithm significantly outperforms the state-of-the-art CCEC checker (which relies on the Stim simulator) in terms of time, memory, and energy. Our approach demonstrates up to two orders of magnitude speedup over existing methods. Notably, previous attempts at GPU acceleration in this area were unsuccessful, making this the first effective implementation.
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Quang, Nguyen Phung, and Jörg-Andreas Dittrich. "Equivalent Circuits and Methods to Determine the System Parameters." In Vector Control of Three-Phase AC Machines. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-46915-6_6.

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Conference papers on the topic "Equivalent circuit method"

1

Antonini, Giulio. "Application of the Partial Element Equivalent Circuit (PEEC) Method." In 2004_EMC-Europe_Eindhoven. IEEE, 2004. https://doi.org/10.23919/emc.2004.10806013.

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Chebanov, Victor S., Maxim E. Komnatnov, and Sergei P. Kuksenko. "Calculating Capacitive and Inductive Matrices of Printed Circuit Board Interconnects Using Partial Element Equivalent Circuit Method." In 2025 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM). IEEE, 2025. https://doi.org/10.1109/icieam65163.2025.11028263.

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Ruehli, Albert. "Overview and Recent Progress for the Partial Element Equivalent Circuit (PEEC) Method." In 13th International Zurich Symposium and Technical Exhibition on Electromagnetic Compatibility. IEEE, 1999. https://doi.org/10.23919/emc.1999.10791591.

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Wang, Ziwei, and Quanfeng Li. "Electromagnetic Performance Study of CRDM Based on Optimization Equivalent Magnetic Circuit Method." In 2024 3rd International Conference on Energy and Electrical Power Systems (ICEEPS). IEEE, 2024. http://dx.doi.org/10.1109/iceeps62542.2024.10693204.

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Leone, M., H. Brüns, and H. Singer. "Fast EMC Analysis for Printed Circuit Boards using an Equivalent-Wire Method of Moments." In 1998_EMC-Europe_Roma. IEEE, 1998. https://doi.org/10.23919/emc.1998.10791894.

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Leone, M., H. Brüns, and H. Singer. "Fast Susceptibility Analysis for Printed Circuit Boards Using an Equivalent-Wire Method of Moments." In 13th International Zurich Symposium and Technical Exhibition on Electromagnetic Compatibility. IEEE, 1999. https://doi.org/10.23919/emc.1999.10791611.

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Antonini, Giulio, and Albert E. Ruehli. "Fast Element Evaluation for the Partial Element Equivalent Circuit Method Using a Multipole Approach." In 15th International Zurich Symposium and Technical Exposition on Electromagnetic Compatibility. IEEE, 2003. https://doi.org/10.23919/emc.2003.10806250.

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Han Xiong, Ming-Chun Tang, and Shiyong Chen. "Equivalent circuit method analysis metamaterial." In 2016 Progress in Electromagnetic Research Symposium (PIERS). IEEE, 2016. http://dx.doi.org/10.1109/piers.2016.7734826.

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Peng, Hemeng, Quandi Wang, Yongming Yang, and Zongyu An. "Modeling Method of Broadband Equivalent Circuit for Motor." In 2012 Sixth International Conference on Electromagnetic Field Problems and Applications (ICEF). IEEE, 2012. http://dx.doi.org/10.1109/icef.2012.6310310.

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Ganji, B. A., and B. Y. Majlis. "Condenser microphone performance simulation using equivalent circuit method." In 2004 IEEE International Conference on Semiconductor Electronics. IEEE, 2004. http://dx.doi.org/10.1109/smelec.2004.1620830.

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Reports on the topic "Equivalent circuit method"

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Yang, Yu, Hen-Geul Yeh, and Cesar Ortiz. Battery Management System Development for Electric Vehicles and Fast Charging Infrastructure Improvement. Mineta Transportation Institute, 2024. http://dx.doi.org/10.31979/mti.2024.2325.

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The electric vehicle (EV) has become increasingly popular due to its being zero-emission. However, a significant challenge faced by EV drivers is the range anxiety associated with battery usage. Addressing this concern, this project develops a more efficient battery management system (BMS) for electric vehicles based on a real-time, state-of-charge (SOC) estimation. The proposed study delivers three modules: (1) a new equivalent circuit model (ECM) for lithium-ion batteries, (2) a new SOC estimator based on the moving horizon method, and (3) an on-board FPGA implementation of the classical Coulomb counting method for SOC estimation. The research team extends the traditional ECM by incorporating more functional features through the least absolute shrinkage and selection operator (LASSO). Then the first-order transfer function model identification and LASSO are iteratively executed to minimize the data fitting error. Given this model, the research team employs the moving horizon estimator (MHE) to determine the SOC by fitting the measured terminal voltage. Subsequently, the research team implements the SOC estimation scheme on an FPGA board. This hardware-in-the-loop simulation is demonstrated in this report step by step. The proposed research has broad societal impacts. It aligns with SB1 objectives in several ways. First, EVs with a more efficient BMS can improve their cruise range, reducing energy consumption and traffic congestion. Second, the resulting BMS can be applied in the solar-power and battery-assisted charging stations to make more reliable infrastructure in an age of sustainable transportation.
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