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Artykuły w czasopismach na temat „Equivalent Circuit Analysis”

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Data publikacji: 6 września 2023

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1

Xueqian Zhang, Xueqian Zhang, Quan Li Quan Li, Wei Cao Wei Cao, et al. "Equivalent circuit analysis of terahertz metamaterial f ilters (Invited Paper)." Chinese Optics Letters 9, no. 11 (2011): 110012–16. http://dx.doi.org/10.3788/col201109.110012.

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Cho, Jeong-Ho, Hoon-Taek Chung, and Ho-Gi Kim. "Equivalent circuit analysis for ferroelectrics." Ferroelectrics 198, no. 1 (1997): 1–10. http://dx.doi.org/10.1080/00150199708228333.

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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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4

Drake, R. E., S. J. Allen, J. Katz, J. C. Gabel, and G. A. Laine. "Equivalent circuit technique for lymph flow studies." American Journal of Physiology-Heart and Circulatory Physiology 251, no. 5 (1986): H1090—H1094. http://dx.doi.org/10.1152/ajpheart.1986.251.5.h1090.

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Lymph vessels branch and interconnect in a manner similar to a complex electronic circuit. Accordingly, we have applied circuit analysis techniques to the analysis of lymphatic systems. A lymph vessel is cannulated and the "equivalent circuits" are determined for the parts of the vessel upstream and downstream of the site of cannulation. Each equivalent circuit consists of a single resistor in series with a single pressure source. A diode is included to represent the lymphatic valves. The lymph flow rate may be determined by calculating the flow in the circuits when they are connected to each other. This technique can be applied to larger lymph trunks that receive lymph from many tissues.

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5

Jiang, Fengjiao, Jinxin Gong, Jichao Zhu, Huan Wang, and Weibo Song. "Prediction and Analysis of Reinforcement Corrosion in Simulated Concrete Pore Solution Based on Neural Network." International Journal of Pattern Recognition and Artificial Intelligence 34, no. 14 (2020): 2059047. http://dx.doi.org/10.1142/s0218001420590478.

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The corrosion of reinforcement has always been a problem to be solved in the field of architecture. In this paper, the corrosion characteristics of chromium alloy steel under different pH conditions are studied. The impedance characteristics and equivalent circuit are predicted by neural network model. First of all, in simulated pore solution with different pH values, the characteristics of Nyquist impedance spectroscopy of the whole chromium alloy under passivation stage and the damaged passivation film of reinforcing bars under initial corrosion stage have been found. Then, according to the difference of impedance characteristics under different pH values, different equivalent circuits have been established and [Formula: see text] values of different equivalent circuits under different chloride ion concentration have been calculated. By fitting the electrochemical parameters of the equivalent circuit with [Formula: see text] values, the equivalent circuit model which can be predicted by neural network has good consistency with the equivalent circuit which can be predicted by [Formula: see text] values.

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6

Liu, Zu Chao, Jia Sheng Zhang, Xi Peng Xiao, Shou Wen Zhu, and Rui Chen. "Dual Analysis of DC Chopper Circuit with LC Input Filter." Advanced Materials Research 977 (June 2014): 413–17. http://dx.doi.org/10.4028/www.scientific.net/amr.977.413.

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The Buck circuit has been widely used in DC drive, charging and storage circuit, switching power supply and other power electronic devices. There exists very strong duality in the Buck circuit with input LC filter, especially in the structure of circuit, the equivalent circuits and the waveforms of input and output parts. On the basis of a theoretical model established in our work, an experiment is conducted to validate the equivalent circuits of both input and output parts, as well as the waveforms of associated capacitors and inductors. By choosing appropriate component parameters, the experimental results confirm the predictions of the theoretical model proposed.

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7

Li, Kuang Cheng, Yan Liu, Zheng Liu, and Huai Bin Yang. "A Research and Analysis on Equivalent Circuit Model of Lead-Acid Batteries of Armored Vehicles." Applied Mechanics and Materials 654 (October 2014): 119–23. http://dx.doi.org/10.4028/www.scientific.net/amm.654.119.

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To analyze the operation of the lead-acid battery of armored vehicles and facilitate the measurement of the state parameters, we need to see the lead-acid battery as a plurality of ideal components and establish the corresponding equivalent circuit model and characterize it. This paper describes several equivalent circuit models of commonly used lead-acid batteries, on this basis, we give the equivalent circuit model of lead-acid batteries of armored vehicles, and to analyze the variables of equivalent circuits.

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8

Chatzarakis, George E., P. G. Cottis, Marina D. Tortoreli, P. B. Malatestas, N. J. Kolliopoulos, and Spiros N. Livieratos. "Powerful Pedagogical Approaches for Finding Thevenin and Norton Equivalent Circuits for Linear Electric Circuits." International Journal of Electrical Engineering & Education 42, no. 4 (2005): 350–68. http://dx.doi.org/10.7227/ijeee.42.4.6.

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This paper presents two powerful pedagogical approaches for finding Thevenin and Norton equivalent circuits for d.c. linear electric circuits. These approaches are based solely on mesh analysis (for planar circuits) and on nodal analysis (for planar or nonplanar circuits) and simultaneously provide all equivalent circuit parameters from one circuit.

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9

Akimoto, Benjamin, and Wataru Natsu. "Study on Parameter Determination for ECM Equivalent Circuit." Applied Mechanics and Materials 220-223 (November 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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10

Bao, Bo-Cheng, Jian-Ping Xu, Guo-Hua Zhou, Zheng-Hua Ma, and Ling Zou. "Chaotic memristive circuit: equivalent circuit realization and dynamical analysis." Chinese Physics B 20, no. 12 (2011): 120502. http://dx.doi.org/10.1088/1674-1056/20/12/120502.

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11

Wang, Haitian, Ge Li, Guangfu Tang, and Zhiyuan He. "Equivalent Circuit Analysis for Core Snubber." IEEE Transactions on Plasma Science 40, no. 3 (2012): 635–40. http://dx.doi.org/10.1109/tps.2011.2180402.

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12

Sun, Qiu Dong, Zheng Guo Liu, Wen Xin Ma, and Jiang Wei Huang. "The Equivalent Proving of Two Typical Vector Composing PM Circuits and their Characteristic Analysis." Advanced Materials Research 298 (July 2011): 193–96. http://dx.doi.org/10.4028/www.scientific.net/amr.298.193.

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PM, Vector Composing, Armstrong PM, QAM-based PM, Equivalent Analysis Abstract. Both the Armstrong phase modulation (PM) and QAM-based PM are typical vector composing circuits in the course “Radio Frequency Circuits”. Due to having innate defects of nonlinear phase distortion and parasitical AM, the characteristics of Armstrong PM are not good unless the modulation exponent is small enough. Therefore, the Armstrong PM is an approximate circuit. The QAM- based PM is a quite different circuit from the Armstrong PM, and its defects are not given in general teaching material. The equivalence of two circuits is proved in this paper by mathematical method. So, the QAM-based PM has same pros and cons with Armstrong PM and can be replaced with the latter completely.

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13

Qian, Jing, Yun Zeng, Li Xiang Zhang, and Tian Mao Xu. "Analysis on Equivalence between Transfer Function and Equivalent Circuit Simulation in General Hamiltonian Modeling." Applied Mechanics and Materials 204-208 (October 2012): 4896–99. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.4896.

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Take generator system included AVR (automatic voltage regulator) and PSS (power system stabilizer) as an example, Using the time simulation method, Study the equivalence between the transfer function model and the equivalent circuit simulation, and establish the corresponding relations between the circuit structures, internal parameters and transfer function parameters, based on the energy of equivalent circuit, the Hamiltonian function of transfer function is derived indirectly, and the Hamiltonian model is established. The study in this paper provides a new way to establish generalized Hamiltonian model for linear system based on transfer function.

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14

Staniloiu, Marius, Horațiu Popescu, Georgiana Rezmeriţă, and Mihai Iordache. "The Equivalent Circuits Thévenin and Norton." Scientific Bulletin of Electrical Engineering Faculty 21, no. 2 (2021): 40–48. http://dx.doi.org/10.2478/sbeef-2021-0021.

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Abstract The main objectives of this paper are to correctly define the equivalent Thévenin and Norton circuits and to presents the complete and exact proof of Thévenin and Norton theorems. These circuits allow the separation of the linear portions of the electronic circuits from the nonlinear ones and in this way the polarization process of the electronic devices becomes much more efficient. When linear and/or nonlinear analyzed circuits have a small number of nonlinear circuit elements, their analysis, synthesis, and simulation are performed much more efficiently if the nonlinear part of the circuit is separated from the linear one. By determining the equivalent Thévenin or Norton circuits in relation to the load to connected terminals of a system with two or more magnetic coupled coils, that are part of the wireless power transfer systems, optimal load parameters are determined so that the maximum active power is transmitted to the load.

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15

Song, In-Soo, Byoung-Wook Jo, and Ki-Chan Kim. "Analysis of an IPMSM Hybrid Magnetic Equivalent Circuit." Energies 14, no. 16 (2021): 5011. http://dx.doi.org/10.3390/en14165011.

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The most common type of electric vehicle traction motor is the interior permanent magnet synchronous motor (IPMSM). For IPMSM designs, engineers make use of the magnetic equivalent circuit method, which is a lumped constant circuit method, and the finite element method, which is a distributed constant circuit method. The magnetic equivalent circuit method is useful for simple design through fast and intuitive parameters, but it cannot derive the distribution of the magnetic field. The finite element method can derive an accurate magnetic field distribution, but it takes a long time and is difficult to use for analysis of intuitive design parameters. In this study, the magnetic equivalent circuit method and Carter’s coefficient were combined for rotor structure design and accurate identification and analysis of circuit constants. In this paper, this design method is called the hybrid magnetic equivalent circuit method. Intuitive design parameters are derived through this hybrid magnetic equivalent circuit method. The air gap flux density distribution according to rotor shape, no-load-induced voltage, and cogging torque was analyzed and compared to results of the finite element method. The proposed method was found to achieve a short solving time and acceptably accurate results.

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16

Semenova, Mariya, Dar’ya Kazazaeva, and Alika Sabychikova. "Simulation and analysis of transition processes in linear electrical circuits using MatLab software package." E3S Web of Conferences 389 (2023): 01045. http://dx.doi.org/10.1051/e3sconf/202338901045.

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The research work considers the simulation and analysis of transition processes in linear electrical circuits using the MatLab software package. The transition processes occurring in the following linear electrical circuits were analyzed: RL equivalent circuit in case of connecting the relay control winding to a DC voltage source; RC equivalent circuit in case of connecting a capacitor through a limiting resistor to a DC voltage source and disconnecting it from the source; RLC equivalent circuit in case of capacitor discharge to an inductor; this capacitor shall be pre-charged from a DC voltage source; a branched electrical circuit of the first order where its topology changes after switching. As a result of the research, the transition process graphs were obtained for which the simulated completion time of the transient process does not differ from the calculated values with an error of less than 2%. The analysis of transition processes revealed the following: the winding inductance effect on the time of relay switching; the effect of the additional resistance value on the charge (discharge) of the capacitor; the effect of the resistance value change when the capacitor is discharged in a circuit with two reactive elements; the effect of changes in the topology of the electrical circuit on the intensity of the transient process after switching.

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17

Zіrka, S. E., Y. I. Moroz, and C. M. Arturi. "Once again about the indivisibility of the scattered inductance of the transformer." Electrical Engineering and Power Engineering, no. 1 (March 31, 2021): 8–17. http://dx.doi.org/10.15588/1607-6761-2021-1-1.

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Purpose. The purpose of the article is to show the inadequacy of the traditional T-shaped equivalent circuit for modeling transformer operations with saturated core. The aim is to point out the unreasonableness of the separation of the transformer leakage inductance into components. The aim is also to explain the need to apply the П-shaped transformer equivalent circuits to transformers with two and three windings with finite radial thickness. Methodology. Analysis of magnetic fields in the transformer window and simulation of transient processes in equivalent circuits of the transformer using a preprocessor ATPDraw to the program ATP. Findings. The unfoundedness of the well-known T-shaped transformer equivalent circuit is shown. Differences in the processes in the core legs and yokes when transformer is connected to the network and during short circuits of the windings are noted. Equivalent circuits of a transformer with two and three windings of finite thickness are proposed, reproducing these differences. Originality. The absence of physical meaning in dividing the transformer leakage inductance into components is stated. The advantages of the П-shaped equivalent circuit are shown when calculating inrush currents accompanying the transformer switching to the network on its inner and outer windings. Practical value. We show theoretical insolvency and practical unsuitability of the Т-shaped equivalent circuit for studying transformer operations accompanied by saturation of the magnetic circuit. Advantages of the П-shaped equivalent circuit are clarified.

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18

Sano, Eiichi, and Masayuki Ikebe. "EQUIVALENT CIRCUIT ANALYSIS OF ARTIFICIAL DIELECTRIC LAYERS." Progress In Electromagnetics Research M 60 (2017): 85–92. http://dx.doi.org/10.2528/pierm17042801.

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19

Ramkrishna and Rajveer Singh Yaduvanshi. "Optical DRA and its equivalent circuit analysis." Journal of Discrete Mathematical Sciences and Cryptography 24, no. 5 (2021): 1215–28. http://dx.doi.org/10.1080/09720529.2021.1938986.

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20

Aoyagi, Ryohji, and Haruo Tanaka. "Equivalent Circuit Analysis of Piezoelectric Bending Vibrators." Japanese Journal of Applied Physics 33, Part 1, No. 5B (1994): 3010–14. http://dx.doi.org/10.1143/jjap.33.3010.

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21

Koike, Takuro, and Masafumi Ohba. "Equivalent Circuit Analysis for Magnetostatic Wave Devices." IEEJ Transactions on Electronics, Information and Systems 111, no. 9 (1991): 419–24. http://dx.doi.org/10.1541/ieejeiss1987.111.9_419.

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22

Koike, Takuro, and Masafumi Ohba. "Equivalent circuit analysis for magnetostatic wave devices." Electrical Engineering in Japan 112, no. 7 (1992): 102–10. http://dx.doi.org/10.1002/eej.4391120710.

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Pichuev, A. V., and V. L. Petrov. "Equivalent circuit for mine power distribution systems for the analysis of insulation leakage current." Gornye nauki i tekhnologii = Mining Science and Technology (Russia) 8, no. 1 (2023): 78–86. http://dx.doi.org/10.17073/2500-0632-2023-01-72.

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Successful mining businesses rely heavily on the safety and reliability of their mine power distribution systems. Mine power distribution systems are designed to withstand an aggressive environment with a range of hazards. The harsh operating conditions require improvement to personnel protection systems through the study and simulation of the electric network’s normal and emergency operations. The purpose of this study is to assess insulation leakage current using an equivalent circuit of a mine power distribution system. The simulation identified the key properties of the equivalent circuit which can model potential hazardous situations. We also selected the quantitative metrics and the equivalent circuit property ranges. In order to simulate the transients, we recommended using the time constants for the oscillation damping in circuits, the insulation phase resistance properties, and the absorption currents. This paper presents the equations to estimate these values. As an example, we considered the equivalent circuit of a mine power distribution system with an R-L filter in the residual current device line. The equivalent circuit helps analyze the current leakage when a person touches a live phase conductor accounting for low-frequency polarization in the phase insulation. The proposed approach to the simulation and analysis of the insulation current makes it possible to generate an equivalent circuit of the mine power distribution system to analyze phase voltage asymmetry, trip currents of residual current devices, low-frequency polarization of the insulation, and the leakage current effects on the human body.

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24

Ma, Tengfei, Yunshui Zheng, Jing Xu, and Jianfa Wang. "Uninsulated Track Circuit Parameter Adjustment and Ballast Resistance Analysis." Journal of Physics: Conference Series 2561, no. 1 (2023): 012019. http://dx.doi.org/10.1088/1742-6596/2561/1/012019.

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Abstract Uninsulated track circuits are increasingly used in railroad signaling equipment, but the external environment dramatically influences operating conditions. Using the relationship between uninsulated track circuits and ballast resistance, an equivalent four-terminal network model of track circuit transmission characteristics is constructed based on uniform transmission line theory to analyze the influence law of ballast resistance on track surface current. It also makes corresponding adjustments to the track circuit parameters to ensure that the track circuit can work reliably in all four different operating conditions to ensure the safety of railroad transportation.

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25

Yang, Ningning, Cheng Xu, Chaojun Wu, Rong Jia, and Chongxin Liu. "Dynamic Behaviors and the Equivalent Realization of a Novel Fractional-Order Memristor-Based Chaotic Circuit." Complexity 2018 (December 2, 2018): 1–13. http://dx.doi.org/10.1155/2018/9467435.

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This paper proposed a novel fractional-order memristor-based chaotic circuit. A memristive diode bridge cascaded with a fractional-order RL filter constitutes the generalized fractional-order memristor. The mathematical model of the proposed fractional-order chaotic circuit is established by extending the nonlinear capacitor and inductor in the memristive chaotic circuit to the fractional order. Detailed theoretical analysis and numerical simulations are carried out on the dynamic behavior of the proposed circuit by investigating the stability of equilibrium points and the influence of circuit parameters on bifurcations. The results show that the order of the fractional-order circuit has a great influence on the dynamical behavior of the system. The system may exhibit complicated nonlinear dynamic behavior such as bifurcation and chaos with the change of the order. The equivalent circuits of the fractional-order inductor and capacitor are also given in the paper, and the parameters of the equivalent circuits are solved by an undetermined coefficient method. Circuit simulations of the equivalent fractional-order memristive chaotic circuit are carried out in order to validate the correctness of numerical simulations and the practicability of using the integer-order equivalent circuit to substitute the fractional-order element.

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26

Reljin, Branimir, Slavica Ristić, and Milesa Srećković. "Analysis of Some Physical Phenomena and Processes by Equivalent Electrical Circuits." International Journal of Electrical Engineering & Education 33, no. 4 (1996): 353–72. http://dx.doi.org/10.1177/002072099603300407.

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Analysis of some physical phenomena and processes by equivalent electrical circuits Electric circuit analysis is a very powerful tool solving many complex problems. Consequently, most non-electrical problems can be efficiently resolved if they are modelled, first, by appropriate electric circuits. In this paper some physical phenomena (in thermodynamics, optics and dynamics of fluids) are chosen to illustrate the above statement. The modelling procedure exposed can also be extended to other problems in science.

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27

Lu, Guang Ming, Wei Zhang, Jian Feng Yan, et al. "Comparative Analysis of the Calculation Results of Online Short-Circuit Current Based on PSASP and Fault Wave Recording." Advanced Materials Research 1070-1072 (December 2014): 897–901. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.897.

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In daily operation process,the results of online short-circuit current calculation and fault wave recording is different, the differences between the two results affected the dispatcher’s decision. In-depth analysis of the calculation process and finding the possible causes of the differences should be done. The on-line PSASP short-circuit current calculation based on power flow and scheme was studied. The boundary conditions and calculation models of two methods were studied, the influence of the modeling scope and equivalent circuits to the short-circuit current was also studied. Fault wave recording calculated short-circuit current through forward calculation, the middle to both sides calculation and backward calculation, and the differences of the three calculation mode were also analyzed. Through the above analysis and comparison, online data equivalent to 220kV high voltage side of the transformer greatly impacts short-circuit current, but effective value calculation method of fault wave recording has a little impact on the short-circuit current, mainly in the following reasons, the first one is that non-dispatching power plant is equivalent to a load, the second one is that several different types of load is equivalent to a load using one load model, the third one is that all devices connecting to low voltage side of the 220kV transformers are equivalent to 220kV. Conclusions of the analysis can provide the basis for the practical work of online short-circuit current calculation.

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28

Kai Yang and Ke-Li Wu. "Generalized Partial-Element Equivalent-Circuit Analysis for Planar Circuits With Slotted Ground." IEEE Transactions on Microwave Theory and Techniques 57, no. 7 (2009): 1734–42. http://dx.doi.org/10.1109/tmtt.2009.2022589.

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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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Khalaj-Amirhosseini, Mohammad. "EQUIVALENT CIRCUIT MODEL FOR ANALYSIS OF INHOMOGENEOUS GRATINGS." Progress In Electromagnetics Research 69 (2007): 21–34. http://dx.doi.org/10.2528/pier06100501.

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Ohba, Masafumi, and Takuro Koike. "Improved Equivalent Circuit Analysis for Magnetostatic Wave Devices." Japanese Journal of Applied Physics 30, S1 (1991): 185. http://dx.doi.org/10.7567/jjaps.30s1.185.

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Norazman, Siti Nur Adlina, Mohd Sobri Idris, Rozana Aina Maulat Osman, and Ku Noor Dhaniah Ku Muhsen. "Impedance and Equivalent Circuit Analysis of Li7La3Zr1.5Sn0.5O12 Ceramics." Journal of Electronic Materials 51, no. 2 (2021): 718–26. http://dx.doi.org/10.1007/s11664-021-09327-3.

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Minowa, S., T. Yanada, O. Ichinokura, and S. Kikuchi. "Equivalent Circuit Analysis of a Noise-Reduction Transformer." Journal of the Magnetics Society of Japan 23, no. 4−2 (1999): 1485–88. http://dx.doi.org/10.3379/jmsjmag.23.1485.

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Yeu, Rodney, Jason Wells, Chad Miller, and Jane Thompson. "Power Quality Assessment through Stochastic Equivalent Circuit Analysis." SAE International Journal of Aerospace 9, no. 1 (2016): 30–36. http://dx.doi.org/10.4271/2016-01-1988.

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Araneo, R., S. Barmada, and A. Musolino. "Analysis of Equivalent Circuit Sensitivity on Extraction Procedure." Electromagnetics 30, no. 4 (2010): 324–46. http://dx.doi.org/10.1080/02726341003712541.

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Jiang, H., and P. K. L. Yu. "Equivalent circuit analysis of harmonic distortions in photodiode." IEEE Photonics Technology Letters 10, no. 11 (1998): 1608–10. http://dx.doi.org/10.1109/68.726765.

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Pintilie, L., I. Pintilie, T. Botila, D. Petre, and I. Licea. "Equivalent circuit analysis of a PbS/ferroelectric heterostructure." Infrared Physics & Technology 38, no. 1 (1997): 51–58. http://dx.doi.org/10.1016/s1350-4495(96)00026-6.

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MATSUI, N. "Equivalent circuit analysis of high temperature solid electrolyte." Solid State Ionics 18-19 (January 1986): 888–91. http://dx.doi.org/10.1016/0167-2738(86)90281-x.

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DUMITRIU, LUCIA, and MIHAI IORDACHE. "NUMERICAL STEADY-STATE ANALYSIS OF NONLINEAR ANALOG CIRCUITS DRIVEN BY MULTITONE SIGNALS." International Journal of Bifurcation and Chaos 17, no. 10 (2007): 3595–601. http://dx.doi.org/10.1142/s0218127407019421.

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Widely-separated time scales appear in many electronic circuits, making traditional analysis difficult, even impossible, if the circuits are highly nonlinear. This paper presents a new version of the modified nodal method in two time variables for the analysis of the circuit with widely separated time scales. By applying this approach the differential algebraic equations (DAE) describing the nonlinear analog circuits driven by multitone signals are transformed into multitime partial differential equations (MPDEs). In order to solve MPDEs, associated resistive discrete equivalent circuits (companion circuits) for the dynamic circuit elements are used. The boundary conditions are detailed and simulation results are presented.

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Aladdin Bayramov, Lala Bekirova, Aladdin Bayramov, Lala Bekirova. "MATHEMATICAL MODELING OF THE OPERATION OF AUDIO FREQUENCY (NO JUNCTION) AND JUNCTION RAIL CIRCUITS." PIRETC-Proceeding of The International Research Education & Training Centre 24, no. 03 (2023): 49–55. http://dx.doi.org/10.36962/piretc24032023-49.

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Rail circuits are the basic elements of modern railway automation and telemechanics systems, performing the functions of track sensors and telemechanical channels. It is shown that the calculation of their operating boundary conditions becomes more complicated with the application of junctionless audio frequency rail circuits. The analysis of track circuits consists of studying the changes in their operation in various modes when the circuit parameters are changed. During the analysis, the optimal values of the parameters of the circuit elements and the frequency of the power source are determined for the given operating conditions. An analysis of the factors affecting the operating currents and voltages of such rail circuit schemes has been carried out. When analyzing and calculating a track circuit, it is assumed that the track line and equipment elements are linear, that is, their parameters do not depend on the flowing currents. To simplify the calculations, the track circuit is represented by the corresponding mathematical model (equivalent circuit) for each mode. Depending on the type of equivalent circuit used, four-pole and multi-pole models are distinguished. At the same time, the analysis and reporting of jointed rail circuits are carried out. Based on their results, the directions that allow for more accurate modeling of the operating modes of the circuits of the non-joint audio frequency rail circuits have been determined. Keywords: Rail circuits, train traffic safety, audio frequency (no junction) track circuits, junction rail circuits, signaling system, track sensors, mathematical model, remote conditioning monitoring.

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Na Songkhla, Sawit, and Takamichi Nakamoto. "Overview of Quartz Crystal Microbalance Behavior Analysis and Measurement." Chemosensors 9, no. 12 (2021): 350. http://dx.doi.org/10.3390/chemosensors9120350.

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Quartz Crystal Microbalance (QCM) is one of the many acoustic transducers. It is the most popular and widely used acoustic transducer for sensor applications. It has found wide applications in chemical and biosensing fields owing to its high sensitivity, robustness, small sized-design, and ease of integration with electronic measurement systems. However, it is necessary to coat QCM with a sensing film. Without coating materials, its selectivity and sensitivity are not obtained. At present, this is not an issue, mainly due to the advancement of oscillator circuits and dedicated measurement circuits. Since a new researcher may seek to understand QCM sensors, we provide an overview of QCM from its fundamental knowledge. Then, we explain some of the recent QCM applications both in gas-phase and liquid-phase. Next, the theory of QCM is introduced by using piezoelectric stress equations and the Mason equivalent circuit, which explains how the QCM behavior is obtained. Then, the conventional equations that govern QCM behaviors in terms of resonant frequency and resistance are described. We show the behavior of QCM with a viscous film based on the acoustic wave equation and Mason equivalent circuit. Then, we present various existing QCM electronic measurement methods. Furthermore, we describe the experiment on QCM with viscous loading and its interpretation based on the Mason equivalent circuit. Lastly, we review some theoretical models to describe QCM behavior with various models.

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Moss, Terry L., and Yinchao Chen. "Mesh analysis for extracting the S-parameters of lumped element RF and microwave circuits." International Journal of Electrical Engineering & Education 51, no. 4 (2014): 330–39. http://dx.doi.org/10.7227/ijeee.0005.

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This paper demonstrates the applicability of basic mesh current circuit analysis techniques, usually learned in the first year of engineering studies, to lumped element RF circuits, which are usually taught with more sophisticated analysis techniques. As an example, the S-parameters of the 90° lumped element hybrid coupler is derived using the traditional mesh current analysis, and compared to that of the distributed micro-strip response. The distributed transmission line coupler is transformed into equivalent lumped element PI sections, and then combined for the resulting lumped element coupler. Mesh current analysis is then utilized to demonstrate the equivalence between the lumped element coupler and the micro-strip coupler as well as the ability to easily simulate the effects of finite inductor Q on the circuit's performance.

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Shim, Hayeong, Kyungseop Kim, Heeseon Seo, and Yongrae Roh. "Equivalent Circuit to Analyze the Transmitting Characteristics of a Cymbal Array." Sensors 22, no. 22 (2022): 8743. http://dx.doi.org/10.3390/s22228743.

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A cymbal transducer has a simple structure consisting of a piezoceramic disk and metallic caps and has broadband characteristics when built as an array. The finite element method (FEM) is generally used to analyze the characteristics of acoustic transducers. However, the FEM requires a longer analysis time as the model becomes larger, which makes it limited and less efficient for analyzing the cymbal array. In this study, a new equivalent circuit with higher efficiency and accuracy, comparable to that of the FEM, was proposed to analyze the performance of cymbal arrays. The equivalent circuit for the array was constructed by connecting the equivalent circuits of individual cymbal transducers in parallel with a radiation impedance matrix that included both the self- and mutual radiation characteristics of the array. The validity of the new equivalent circuit was verified by measuring the transmitting voltage response of a cymbal array specimen and comparing it with that calculated using the circuit. The comparison confirmed the efficiency of the equivalent circuit in analyzing the characteristics of the cymbal array. The proposed equivalent circuit can facilitate the design of a large array of cymbal transducers.

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Vaskovskaya, Tatyana A., Marina P. Zhokhova, and Kristina S. Roslova. "Computer-Aided Analysis of Unbalanced Operating Conditions in Three-Phase Circuits Containing a Dynamic Load." Vestnik MEI 1, no. 1 (2021): 62–69. http://dx.doi.org/10.24160/1993-6982-2021-1-62-69.

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A new approach to analyzing three-phase circuits in the phase coordinates under unbalanced normal and emergency operating conditions is proposed, in which the information about the three-phase circuit to be analyzed by means of software is entered in a simplified manner. The equivalent circuits of three-phase generators, power lines, and static and dynamic loads are aggregated and considered in a generalized form. With such presentation, the work with a three-phase circuit diagram is significantly simplified even if it contains unbalanced loads, a few faulty sections, and control links in the equivalent circuits of electrical machines. The labeling of three-phase circuit nodes is proposed that allows three-phase and single-phase parts of the circuit to be distinguished. The topologic list of branches intended for computer-aided calculations of currents and voltages and currents is compiled for three-phase branches in a generalized form. The obtained list is compact and retains a clear representation of the three-phase circuit. The analogy between the basic electrical equations written for electrical circuit three-phase and single-phase branches is shown. Thus, the voltages and currents in a three-phase element are interrelated by equations similar to the generalized Ohm’s law, while Kirchhoff's current law is written for three-phase nodes and has the same form as for single-phase circuits. The analogy of drawing up the incidence matrix and the matrix of nodal equations is shown. Submatrices of dimensions 3 × 3, 1 × 3, or 1 × 1 depending on the node label appear as entries in the incidence matrices and nodal admittance matrices of a three-phase circuit. The nodal equations used for carrying out the subsequent analysis of the circuit in the phase coordinates are written in a standard way as in single-phase circuits. In analyzing emergency operating conditions, it is proposed to keep the simplicity and clarity of the approach by representing the circuit faulty section of as a corresponding branch embedded into the three-phase circuit. The developed approach is illustrated by calculation of unbalanced and emergency operating conditions in a complex three-phase unbalanced circuit containing two synchronous generators, one dynamic load, and one static load. The calculation has been carried for four- and three-wire three-phase circuits.

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Hu Feng-Wei, Bao Bo-Cheng, Wu Hua-Gan, and Wang Chun-Li. "Equivalent circuit analysis model of charge-controlled memristor and its circuit characteristics." Acta Physica Sinica 62, no. 21 (2013): 218401. http://dx.doi.org/10.7498/aps.62.218401.

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Martin, F. G. "Circuit analysis of transmembrane voltage relationships in V-ATPase-coupled ion movements." Journal of Experimental Biology 172, no. 1 (1992): 387–402. http://dx.doi.org/10.1242/jeb.172.1.387.

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The concept of electrical circuit analysis is extended to include components found in membrane ionic transport systems. As in classical electrical equivalent circuits, resistors and capacitors are used to represent ion channels and the membrane capacitances, respectively; batteries represent energy sources driven by chemical reactions. In the extensions proposed, energy stored in various ionic concentrations is treated as charges on compartmental capacitors; symporters and antiporters are treated as energy-coupling devices analogous to transformers in alternating current electrical circuits. Pumps are shown to be special cases of porters in which the input circuit derives its energy from a chemical reaction. Using these components, circuit diagrams are drawn for several examples of membrane ion transport systems. By applying appropriate circuit analysis techniques, these diagrams facilitate the quantitative description of the energy distributions throughout the system.

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Machczynski, Wojciech, Krzysztof Budnik, and Jan Szymenderski. "Assessment of d.c. traction stray currents effects on nearby pipelines." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 4 (2016): 1468–77. http://dx.doi.org/10.1108/compel-12-2015-0477.

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Purpose – dc electrified traction systems are a potential source of stray currents. The purpose of this paper is to evaluate the harmful effects (electrolytic corrosion) that an electrified railway has on nearby earth return circuits (e.g. pipelines). Design/methodology/approach – The electric circuit approach, based on the earth return circuit theory, to model stray currents interference on extended structures is presented. An exact method of calculation is applicable to any dc railway system in which tracks can be represented by a single earth-return circuit (equivalent rail) with current energization. In the approximate method, the equivalent rail with current energization is modeled as a large multinode electrical equivalent circuit with lumped parameters. The circuit is a chain of basic circuits, which are equivalents of homogenous sections of the rail. The electrode kinetics (polarization phenomenon) is taken into account in the model developed. Findings – Formulas in partially closed forms are derived applicable to the analysis of currents and potentials along a pipeline laid in the proximity with railway tracks. The attempt is undertaken, to incorporate the electrode kinetics into the simulation model in which the polarization phenomenon (Tafel equation) is modeled by a non-linear voltage source with source voltage being iteratively calculated. The polarization potential along the affected pipeline can be determined. Originality/value – The pipeline electrochemical response (polarization behavior – non-linear phenomenon on the interface metal-soil electrolyte) to the dc stray currents interference is innovative incorporated into the simulation model with lumped parameters using the iterative process.

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Rahman, Arifur, Takeshi Mizuno, Masaya Takasaki, and Yuji Ishino. "An Equivalent Circuit Analysis and Suspension Characteristics of AC Magnetic Suspension Using Magnetic Resonant Coupling." Actuators 9, no. 3 (2020): 52. http://dx.doi.org/10.3390/act9030052.

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The fundamental characteristics and performances of alternating current (AC) magnetic suspension using magnetic resonant coupling are studied analytically and experimentally. Nowadays, wireless power transfer to the suspended object is required during non-contact suspension in some applications. Therefore, magnetic resonant coupling has been introduced for AC magnetic suspension to achieve self-stabilizing magnetic suspension and energy transfer to the floator simultaneously. The effect of circuit parameters for developing an experimental apparatus and performances are predicted from the solution of the equivalent circuits analytically. First, an equivalent magnetic circuit is derived and analyzed to characterize the self-inductance and mutual inductance with the gap. Second, an equivalent electrical circuit is analyzed to derive the current and force equations including magnetic parameters of the circuit. The derivation of these equations is numerically solved to study the characteristics of the primary current, the secondary current, and the force with respect to the gap and the applied frequency. The comparison between theoretical and experimental results is depicted, and the reason for differences is explained. The experimental and theoretical results show that positive stiffness is possible, which is essential for achieving self-stabilization. The self-stability is confirmed by the frequency response of the suspension system to disturbance experimentally.

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Shiraki, Yasuhiro, Yuichi Sasaki, and Naoto Oka. "Conductive Noise Analysis of Inverter Circuits for Vehicle Equipments Using an Equivalent Circuit." Journal of Japan Institute of Electronics Packaging 18, no. 5 (2015): 372–75. http://dx.doi.org/10.5104/jiep.18.372.

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Wang, Nana. "The Analysis of Electronic Circuit Fault Diagnosis Based on Neural Network Data Fusion Algorithm." Symmetry 12, no. 3 (2020): 458. http://dx.doi.org/10.3390/sym12030458.

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Symmetries play very important roles in the dynamics of electrical systems. The relevant electronic circuits with fault diagnostics, including the optimized neural network algorithm model, are designed on the basis of symmetry principles. In order to improve the efficiency of the circuit pressure test, a circuit pressure function equivalent compression test method based on the parallel neural network algorithm is proposed. For the implementation stage of the circuit pressure test, the improved modified node algorithm (MNA) is used to build an optimization model, and the circuit network is converted into an ordinary differential equation for the circuit pressure function equivalent compression test. The test aims to minimize flux. Then, backpropagation (BP) neural network algorithm data fusion is introduced to optimize the minimum flux model of the cyclic pressure functional equivalent compression test. Finally, a simulation experiment is carried out to verify the effectiveness of the algorithm in the accuracy and efficiency of the pressure test. The results show that the improved BP neural network improves the data fusion accuracy and shortens the sample training time; compared with the uncompressed algorithm, the running time of the proposed algorithm is greatly reduced and the execution efficiency is high; compared with the vascular pressure test method, there is no significant difference in the convergence accuracy and it is at a level of 10−5. Since the parallel computing problem is not considered in either of the two-pulse tube pressure test methods, the convergence time of the algorithm increases exponentially with the increase in the number of parallel threads. However, the algorithm in this research considers the problem of parallel execution and uses a quad-core processor, with no significant change in computing time and high computing efficiency. Therefore, BP neural network data fusion can be used for the fault diagnosis of electronic circuits, with a high operating efficiency and good development prospects.

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