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Journal articles on the topic 'Nonlinear Electric circuits'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 January 2023

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1

Hegendörfer, Andreas, Paul Steinmann, and Julia Mergheim. "Nonlinear finite element system simulation of piezoelectric vibration-based energy harvesters." Journal of Intelligent Material Systems and Structures 33, no. 10 (2021): 1292–307. http://dx.doi.org/10.1177/1045389x211048222.

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Piezoelectric vibration-based energy harvesters consist of an electromechanical structure and an electric circuitry, influencing each other. We propose a novel approach that allows a finite element based system simulation of nonlinear electromechanical structures coupled to nonlinear electric circuitries. In the finite element simulation the influence of the electric circuit on the electromechanical structure is considered via the vector of external forces, using an implicit time integration scheme. To demonstrate the applicability of the new simulation method an active power circuit is consid

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2

Ober-Blöbaum, Sina, and Henning Lindhorst. "Variational integrators for nonlinear electric circuits." PAMM 14, no. 1 (2014): 921–22. http://dx.doi.org/10.1002/pamm.201410441.

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3

TANAKA, Yuji, Seiji HAYANO, Yoshifuru SAITO, Hisashi ENDO, and Kiyoshi HORII. "Visualization of Nonlinear Phenomena in Electric Circuits." Journal of the Visualization Society of Japan 25, Supplement1 (2005): 177–80. http://dx.doi.org/10.3154/jvs.25.supplement1_177.

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4

Podbereznaya, Irina, and Aleksandr Tkachev. "Simulation of Ferroresonance Modes in Nonlinear Electrical Circuits Taking Into Account Magnetic Hysteresis." Известия высших учебных заведений. Электромеханика 65, no. 1 (2022): 13–24. http://dx.doi.org/10.17213/0136-3360-2022-1-13-24.

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The article provides a solution to the problem of numerical simulation of the resonant modes of voltages and cur-rents in electrical circuits arising from the serial and parallel connection of nonlinear inductive and capacitive elements. The Weber-ampere characteristic of the inductive element is set taking into account the hysteresis. Fer-roresonance modes arise in electrical circuits containing capacitive and nonlinear inductive elements, including power transformers, arc-extinguishing reactors, current and voltage measuring transformers, electric motors. The nonlinearity of the characterist

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5

Pahlavani, H. "Josephson junction in the quantum mesoscopic electric circuits with charge discreteness." International Journal of Modern Physics B 32, no. 11 (2018): 1850127. http://dx.doi.org/10.1142/s0217979218501278.

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A quantum mesoscopic electrical LC-circuit with charge discreteness including a Josephson junction is considered and a nonlinear Hamiltonian that describing the dynamic of such circuit is introduced. The quantum dynamical behavior (persistent current probability) is studied in the charge and phase regimes by numerical solution approaches. The time evolution of charge and current, number-difference and the bosonic phase and also the energy spectrum of a quantum mesoscopic electric LC-circuit with charge discreteness that coupled with a Josephson junction device are investigated. We show the rol

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Ma, Siyu, Ping Zhou, Jun Ma, and Chunni Wang. "Phase synchronization of memristive systems by using saturation gain method." International Journal of Modern Physics B 34, no. 09 (2020): 2050074. http://dx.doi.org/10.1142/s0217979220500745.

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A variety of electric components can be used to bridge connection to the nonlinear circuits, and continuous pumping and consumption of energy are critical for voltage balance between the output end. The realization and stability of synchronization are mainly dependent on the physical properties of coupling channel, which can be built by using different electric components such as resistor, capacitor, induction coil and even memristor. In this paper, a memristive nonlinear circuit developed from Chua circuit is presented for investigation of synchronization, and capacitor, induction coil are jo

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7

Patalakh, D., A. Prykhodko, K. Lut, and S. O. Tykhovod. "Improvement of modeling techniques of transients in transformers based on magnetoelectric equivalent schemes." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 6 (2021): 107–12. http://dx.doi.org/10.33271/nvngu/2021-6/107.

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Purpose. Use of an improved numerical method of calculating transient processes in electrical circuits for modeling electromagnetic processes in nonlinear magneto-electric circuits, and also development of a circuit model based on this method, which leads to the convenience of calculation. Methodology. Approximation of functions by Chebyshevs polynomials, numerical methods of differential equations integrating, matrix methods, spline interpolation, programming, theory of electric and magnetic circuits. Findings. On the base of the well-known method of transient process analysis in linear elect

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8

KHEIRANDISH, F., and H. PAHLAVANI. "DRIVEN MESOSCOPIC ELECTRIC CIRCUITS." Modern Physics Letters B 22, no. 01 (2008): 51–60. http://dx.doi.org/10.1142/s0217984908014511.

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The quantum theory for a mesoscopic electric circuit with charge discreteness is investigated. The persistent current on a quantum ring using an algebraic approach have been obtained. The energy spectrum and the persistent current of a quantum LC-design mesoscopic circuit, with a time-dependent external source, have been found.

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9

Kotwal, Tejas, Fischer Moseley, Alexander Stegmaier, et al. "Active topolectrical circuits." Proceedings of the National Academy of Sciences 118, no. 32 (2021): e2106411118. http://dx.doi.org/10.1073/pnas.2106411118.

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The transfer of topological concepts from the quantum world to classical mechanical and electronic systems has opened fundamentally different approaches to protected information transmission and wave guidance. A particularly promising emergent technology is based on recently discovered topolectrical circuits that achieve robust electric signal transduction by mimicking edge currents in quantum Hall systems. In parallel, modern active matter research has shown how autonomous units driven by internal energy reservoirs can spontaneously self-organize into collective coherent dynamics. Here, we un

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10

Horyachko, Vsevolod, Orest Hamola, and Taras Ryzhyi. "Analysis of magnetic fields of electrical devices based on their circuit models." Computational Problems of Electrical Engineering 11, no. 1 (2021): 7–11. http://dx.doi.org/10.23939/jcpee2021.01.007.

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he article deals with an analysis of magnetic fields of electric machines and electromagnetic devices on the basis of their circuit mathematical models. The magnetic systems of electrical devices in these models are presented in the form of planar nonlinear magnetic circuits with lumped elements. The parameters of these elements are determined on the basis of geometric dimensions taking into account the design features of the devices and the physical parameters of the environment.

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11

Ibadullaev, M., and A. N. Tovbaev. "Research of Ferr-Resonance Oscillations at the Frequency of Subharmonics in Three-Phase Non-Linear Electric Circuits and Systems." E3S Web of Conferences 216 (2020): 01113. http://dx.doi.org/10.1051/e3sconf/202021601113.

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It is known that the occurrence and existence of ferroresonant oscillations at the subharmonic frequency (SHC) in power transmission lines (TL) and in power supply systems is extremely undesirable, since they cause ferroresonant overvoltages at different frequencies. At the same time, there is a wide class of nonlinear electrical circuits, in which the excitation of autoparametric oscillations (AIC) at the frequency of the SHC forms the basis of frequency converting devices serving as secondary power sources. It is shown that three-phase nonlinear systems are in one way or another equivalent c

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12

Wang, Chunni, Zhao Yao, Wenkang Xu, and Guodong Ren. "Phase synchronization between nonlinear circuits by capturing electromagnetic field energy." Modern Physics Letters B 34, no. 29 (2020): 2050323. http://dx.doi.org/10.1142/s0217984920503236.

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Smart nonlinear circuits can be tamed to reproduce the main dynamical properties in neural activities and thus neural circuits are built to estimate the occurrence of multiple modes in electric activities. In the presence of electromagnetic radiation, the cardiac tissue, brain and neural circuits are influenced because field energy is injected and captured when induction field and current are generated in the media and system. In this paper, an isolated Chua circuit is exposed to external electromagnetic field and energy capturing is estimated for nonlinear analysis from physical viewpoint. Fu

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13

Zhang, Xiaoqin. "Transient Calculation of Electric Power Circuits with Special Reference to Magnetizing Nonlinearity." Journal of Circuits, Systems and Computers 25, no. 06 (2016): 1650054. http://dx.doi.org/10.1142/s0218126616500547.

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This paper proposes a realistic model of magnetizing branches for transient calculation of electric power circuits. The model represents the nonlinear relationship between flux linkage and exciting current of magnetizing branches with a major loop and a family of minor loop trajectories, which has the capability of simulating the multi-valued hysteresis behavior. By applying the proposed model to transient calculation, an efficient algorithm is developed for obtaining the transient responses in electric power circuits. In the algorithm, the electric power circuit is divided into the magnetizin

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14

Ibadullaev, M. I., A. N. Tovbaev, and A. Zh Esenbekov. "Self-oscillations at the frequency of subharmonics in nonlinear electric chains and systems." E3S Web of Conferences 139 (2019): 01054. http://dx.doi.org/10.1051/e3sconf/201913901054.

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It is known that the occurrence and existence of autoparametric oscillations (AIC) at the subharmonic frequency (GHC) in power lines (power lines) and in power supply systems is extremely undesirable, since they cause ferroresonant overvoltages at different frequencies. At the same time, there is an extensive class of nonlinear electric circuits in which the excitation of the AIC at the frequency of the SGC forms the basis of frequency-converting devices serving as secondary power sources. It is shown that single-phase-three-phase nonlinear systems are, to one degree or another, equivalent cir

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15

Zhang, Xiufang, Chunni Wang, Jun Ma, and Guodong Ren. "Control and synchronization in nonlinear circuits by using a thermistor." Modern Physics Letters B 34, no. 25 (2020): 2050267. http://dx.doi.org/10.1142/s021798492050267x.

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The survival and occurrence of chaos are much dependent on the intrinsic nonlinearity and parameters region for deterministic nonlinear systems, which are often represented by ordinary differential equations and maps. When nonlinear circuits are mapped into dimensional dynamical systems for further nonlinear analysis, the physical parameters of electric components, e.g. capacitor, inductor, resistance, memristor, can also be replaced by dynamical parameters for possible adjustment. Slight change for some bifurcation parameters can induce distinct mode transition and dynamics change in the chao

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16

Tannir, Dani A. "Computation of intermodulation distortion in RF MEMS variable capacitor circuits using moments." International Journal of Microwave and Wireless Technologies 8, no. 2 (2015): 193–204. http://dx.doi.org/10.1017/s1759078714001548.

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This paper introduces a new technique for the efficient computation of intermodulation distortion in radio frequency circuits that contain microelectromechanical system (MEMS) variable capacitors using moments analysis. This method is applied to an extended harmonic balance formulation, which contains the nonlinear equations that describe the dynamic mechanical behavior of MEMS variable capacitors, in addition to the nonlinear electric circuit equations. As a result, the moments method becomes a general multi-domain simulation method for quantifying nonlinear intermodulation distortion, while

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17

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 qu

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18

LU, TING, and YOU-QUAN LI. "MESOSCOPIC CIRCUIT WITH LINEAR DISSIPATION." Modern Physics Letters B 16, no. 26 (2002): 975–79. http://dx.doi.org/10.1142/s021798490200469x.

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We firstly demonstrate the main ideas of quantum theory for mesoscopic electric circuits, which we proposed several years ago. In the theory, the importance of the charge discreteness in a mesoscopic electric circuit is addressed. As a further development, we discuss the mesoscopic electric circuit in the presence of linear dissipation as well as magnetic flux. We propose a quantum Kirchoff equation for the LCR circuit and discuss the oscillations for different criterion factors. We also solve the energy spectra and eigenvalues of the physical current under a soluble symmetry hypothesis.

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19

Podus, A., D. Patalakh, and S. Tykhovod. "Gyrator-capacitor method for modeling of electromagnetic processes based on magnetoelectric substitution circuits." Electrical Engineering and Power Engineering, no. 4 (December 30, 2020): 8–17. http://dx.doi.org/10.15588/1607-6761-2020-4-1.

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Purpose. Development of magnetoelectric substitution circuits using gyrator-capacitor models Methodology. Numerical methods for solving differential equations of state, mathematical apparatus of matrix algebra, computer programming and methods of electrical circuit theory. Findings. As a result of modification of the known method of calculation of transient electro-magnetic processes on the basis of magnetoelectric substitution circuits, the method using gyrator-capacitor models is developed.  On the basis of the developed method the computer program for calculation of transi

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20

Adamu Alfaki, Hassan, Muhammad Kabir Dauda, Ahmed Mohammed Gimba, and Mohammed Abdullahi Ahmed. "On Modelling and Simulation of Electric Circuit Problems." Malaysian Journal of Computing and Applied Mathematics 3, no. 1 (2020): 24–29. http://dx.doi.org/10.37231/myjcam.2020.3.1.39.

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Differential equations are of fundamental importance in Mathematics, Physical Sciences and Engineering Mathematics. Many mathematical relations and physical laws appeared in the form of such equations. This paper reviewed an application of these equations in solving mathematical model on electric circuit problems using the First order linear differential equation. The analytical approached in solving the equations confirmed that solving electric circuits using first order linear ordinary differential equations gives accurate and reliable result. Therefore, the application is of importance and

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21

Malyar, V. S., O. Ye Hamola, V. S. Maday, and I. I. Vasylchyshyn. "Mathematical modeling of rheostat-reactor start of wound-rotor induction motors." Electrical Engineering & Electromechanics, no. 3 (May 30, 2022): 8–14. http://dx.doi.org/10.20998/2074-272x.2022.3.02.

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Introduction. Wound-rotor induction motors are less common compared squirrel-cage induction motors. However, they occupy a significant share among electric drives with difficult starting conditions. Their advantage is obtaining a high starting electromagnetic torque at lower values of starting currents. Problem. Due to the possibility of including different devices in the rotor circuit, it is possible to shape the starting characteristics according to the needs of the technological process. Due to a narrower range of applications of electric drives based on wound-rotor induction motors, they a

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22

FAN, HONG-YI, and XU-BING TANG. "APPLICATION OF GENERALIZED FEYNMAN–HELLMANN THEOREM IN QUANTIZATION OF LC CIRCUIT IN THERMO BATH." International Journal of Modern Physics B 24, no. 27 (2010): 5309–17. http://dx.doi.org/10.1142/s0217979210054609.

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For the quantized LC electric circuit, when taking the Joule thermal effect into account, we think that physical observables should be evaluated in the context of ensemble average. We then use the generalized Feynman–Hellmann theorem for ensemble average to calculate them, which seems convenient. Fluctuation of observables in various LC electric circuits in the presence of thermo bath growing with temperature is exhibited.

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23

APRELKOV, Ivan N. "Study Results of the Electrical Parameters of the High-Power "Ladle-Furnace" Unit and its Impact on the Power Supply Network." Elektrichestvo 3, no. 3 (2021): 33–43. http://dx.doi.org/10.24160/0013-5380-2021-3-33-43.

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The steel refinement and its chemical composition and temperature finalization processes in a pouring ladle carried out by heating the metal with electric arc have received wide use at modern metallurgical enterprises. The article considers the electrical operating conditions of the ladle furnace unit (LFU) equipped with a 40 MVA electric furnace transformer. It was expected that the LFU load would vary insignificantly, because the electric arc burns between the electrodes and the surface of already molten metal, without the occurrence of short circuits. However, the accomplished studies testi

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24

JI, YING-HUA, HAI-MEI LUO, YI-FAN WANG, and JIAN-MO WANG. "QUANTUM FLUCTUATION IN THERMAL VACUUM STATE FOR MESOSCOPIC DISTRIBUTED PARAMETER CIRCUITS." International Journal of Modern Physics B 19, no. 10 (2005): 1731–40. http://dx.doi.org/10.1142/s0217979205029584.

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In this paper we consider a non-dissipative distributed parameter circuit at a finite temperature T. We find the unitary operator for diagonalizing the Hamiltonian of the uniform periodic transmission line. The unitary operator is expressed in a coordinate representation. Thermal field dynamic is used in our discussion. It is shown that distributing parameter circuits and quantum fluctuations, which also have distributing properties, are related to both the circuit parameters and the positions and the model of signals and temperature T. The higher the temperature, the more quantum noise the ci

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25

PAHLAVANI, H. "THE PERSISTENT CURRENT ON A DRIVEN MESOSCOPIC RLC CIRCUIT." International Journal of Modern Physics B 25, no. 23n24 (2011): 3225–36. http://dx.doi.org/10.1142/s0217979211101788.

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The quantum theory for mesoscopic electric LC circuits with charge discreteness is briefly described. We take into account a resistance element (R) as an environment of the discrete-charge mesoscopic quantum LC circuit which is modeled by a Hamiltonian consisting of oscillators with continuous range of frequencies. Using a minimal coupling method, we investigate the quantum dynamics of this system. Hereby, the persistent current on a quantum damped L-design under the external potential source is obtained. Then, we write Heisenberg equations for a driven mesoscopic quantum RLC circuit with a di

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26

LUO, HAI-MEI, YING-HUA JI, and JIE LIU. "COLLAPSE AND REVIVAL EFFECT IN A MESOSCOPIC LC CIRCUIT." International Journal of Modern Physics B 18, no. 08 (2004): 1217–24. http://dx.doi.org/10.1142/s0217979204024586.

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This paper studied the time evolution of quantum state in a mesoscopic LC circuit with the coupling energy caused by mesoscopic capacitor acting as a tunnel junction. It indicates that the state of the junction evolves into the quantum superposition of two coherent states and, in the state, nonclassical squeezing properties of the circuit appear. It also indicates that the dynamic behavior of the current shows collapse and revival phenomenon. The research in the paper will be helpful to miniaturize integrate circuits and electric components. It will be also important for the utilization of mes

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27

Kanov, L. M. "Noniterative calculation of dynamic processes in electric circuits with nonlinear reactances." Electrical Engineering and Power Engineering, no. 2 (December 22, 2010): 7–11. http://dx.doi.org/10.15588/1607-6761-2010-2-2.

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28

Liu, Zhilong, Chunni Wang, Ge Zhang, and Yin Zhang. "Synchronization between neural circuits connected by hybrid synapse." International Journal of Modern Physics B 33, no. 16 (2019): 1950170. http://dx.doi.org/10.1142/s0217979219501704.

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Reliable neural circuits provide feasible ways to estimate the information encoding and signal exchange between neurons so that more physical effects can be considered and explained. Electrical synapse benefits signal propagation and neurons can give rapid response selection under an external stimulus. Chemical synapse plays a standing biological function by the continuous release of neurotransmitter. Gap junction coupling can estimate the effect of electrical synapse coupling as resistor-based voltage coupling while chemical synapse coupling shows a complex form in synapse currents. In this p

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29

Zawadzki, Andrzej, and Sebastian Różowicz. "Application of Input–State of the System Transformation for Linearization of Selected Electrical Circuits." Journal of Electrical Engineering 67, no. 3 (2016): 199–205. http://dx.doi.org/10.1515/jee-2016-0028.

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Abstract The paper presents a transformation of nonlinear electric circuit into linear one through changing coordinates (local diffeomorphism) with the use of closed feedback loop. The necessary conditions that must be fulfilled by nonlinear system to enable carrying out linearizing procedures are presented. Numerical solutions of state equations for the nonlinear system and equivalent linearized system are included.

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30

Figotin, Alexander. "Synthesis of lossless electric circuits based on prescribed Jordan forms." Journal of Mathematical Physics 61, no. 12 (2020): 122703. http://dx.doi.org/10.1063/5.0020422.

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31

BRUNK, MARKUS, and ANSGAR JÜNGEL. "SIMULATION OF THERMAL EFFECTS IN OPTOELECTRONIC DEVICES USING COUPLED ENERGY-TRANSPORT AND CIRCUIT MODELS." Mathematical Models and Methods in Applied Sciences 18, no. 12 (2008): 2125–50. http://dx.doi.org/10.1142/s0218202508003315.

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A coupled model with optoelectronic semiconductor devices in electric circuits is proposed. The circuit is modeled by differential-algebraic equations derived from modified nodal analysis. The transport of charge carriers in the semiconductor devices (laser diode and photo diode) is described by the energy-transport equations for the electron density and temperature, the drift-diffusion equations for the hole density, and the Poisson equation for the electric potential. The generation of photons in the laser diode is modeled by spontaneous and stimulated recombination terms appearing in the tr

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32

Averbukh, M. "Improved dimensionless nomograms approach in the electric drives and power electronics courses." International Journal of Electrical Engineering & Education 56, no. 1 (2018): 38–50. http://dx.doi.org/10.1177/0020720918776459.

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Parameter estimation of the nonlinear electronic schemes, including inductances, capacitances, resistances, and switches represents a nontrivial problem in the “power electronics” and “electrical drives” courses. Difficulties could be observed during solutions of electrical circuits, which describe the behavior of electric motors in drives, and various electronic appliances are being used in power electronics. This situation is a result of complicated analytical approaches aiming to solve nonlinear ordinary differential equations describing the occurring processes. A typical student has a sign

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33

Rakov, Ivan. "EXPERIMENTAL RESEARCH METHOD OF ADAPTIVE ESTIMATION PARAMETERS OPEN WOUND-ROTOR INDUCTION MOTOR IN A STEADY STATE MODE." Electrical and data processing facilities and systems 18, no. 1 (2022): 63–76. http://dx.doi.org/10.17122/1999-5458-2022-18-1-63-76.

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Relevance For the operation of a closed-loop sensorless electric drive as part of an electrical complex, it is necessary to ensure adequate restoration of the vector of state variables of an induction motor using a customizable mathematical model in the control system. The accuracy of restoring the state variable vector depends on two factors. The first factor is the mathematical description of the substitution circuit of an asynchronous motor by a system of differential equations with certain assumptions that reliably reflects the physical processes occurring in an asynchronous motor. Used in

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34

Taran, A. N., and V. N. Taran. "Application of Volterra-Wiener spline series for the analysis of nonlinear electric circuits." Journal of Communications Technology and Electronics 59, no. 7 (2014): 758–66. http://dx.doi.org/10.1134/s1064226914060199.

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HOWE, R. M. "IMPROVING ACCURACY AND SPEED IN REAL-TIME SIMULATION OF ELECTRIC CIRCUITS." International Journal of Modeling, Simulation, and Scientific Computing 01, no. 01 (2010): 47–83. http://dx.doi.org/10.1142/s1793962310000092.

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This article proposes a methodology for real-time simulation of electric circuits consisting of linear circuit components combined with nonlinear elements, such as diodes and electronic switches, that exhibit discontinuous behavior. The methodology consists of sub-dividing fixed numerical integration time-steps into sub-steps over which the entire circuit behaves linearly, thus permitting the simulation over each sub-step to be performed using analytic formulas. For non-real-time simulation, this has routinely been accomplished using variable-step numerical integration. In the article, we show

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HU, JU-JU, QIANG KE, and YING-HUA JI. "EVOLUTION OF QUANTUM FLUCTUATIONS OF A OVER-DAMPED MESOSCOPIC CIRCUIT AT FINITE TEMPERATURE." International Journal of Modern Physics B 21, no. 31 (2007): 5275–82. http://dx.doi.org/10.1142/s0217979207038307.

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Time evolution of quantum fluctuations is investigated for an over-damped mesoscopic circuit with the help of the quantum characteristic function. It is found that, for an initial squeezed state, the quantum fluctuations of charge and current evolve with time by hyperbolic functions, and relate not only with the circuit parameters, but also the squeezing parameter. It is also found that with other conditions invariant to reducing the quantum fluctuations of charge and current, we should reduce the squeezing amplitude parameter. The research will be helpful in miniaturizing integrated circuits

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37

Albassam, Bassam A. "Fast Attitude Maneuver of a Flexible Spacecraft with Passive Vibration Control Using Shunted Piezoelectric Transducers." International Journal of Aerospace Engineering 2019 (January 17, 2019): 1–18. http://dx.doi.org/10.1155/2019/3162105.

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This paper is concerned with designing a bang-bang control input to perform a quick rotational maneuver of a rigid spacecraft hub connected with flexible appendages. The control design is based on only the rigid body mode making it very simple to design and at the same time achieve the quickest maneuver possible. The induced vibrations are suppressed using piezoelectric transducers bonded to the appendages and connected to an electric circuit with the objective of converting the vibrational energy to electrical energy and then dissipating it using passive electric elements, such as a resistanc

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Osintsev, Anatoly A., Aleksandra I. Naumova, and Elena I. Gracheva. "Analysis of distance protection’s operation in cases of deep saturation of current transformers." E3S Web of Conferences 288 (2021): 01095. http://dx.doi.org/10.1051/e3sconf/202128801095.

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There is usually no information about permissible error of current transformers in modes succeed by large relative short-circuit current, at which microprocessor-based protections operate stably. By this reason, it is necessary to use data, defined for analog relays. It leads to value appreciation of a project because it is often essential to reduce current transformers’ error in case of a short circuit fault. Therefore, it is necessary to define the value of current transformers’ error, permitted for impedance relays. Conclusions of fundamental and applied sciences (mathematical analysis, the

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Ichikawa, Satoshi, and Hideo Tada. "Use of a laplace-transform relaxation method for the analysis of nonlinear electric circuits." Electronics and Communications in Japan (Part III: Fundamental Electronic Science) 75, no. 12 (1992): 11–20. http://dx.doi.org/10.1002/ecjc.4430751202.

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40

Turkovskyi, Volodymyr, Anton Malinovskyi, Andrii Muzychak, and Оlexandr Turkovskyi. "Improvement of electromagnetic compatibility and efficiency of power supply circuits of electric arc furnaces in nonlinear asymmetric modes." Eastern-European Journal of Enterprise Technologies 5, no. 8 (113) (2021): 6–16. http://dx.doi.org/10.15587/1729-4061.2021.243143.

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AC steel arc furnaces are the most powerful units connected to the electrical grid, the operating mode of which is dynamic, asymmetrical and non-linear. That is why these furnaces cause the entire possible range of negative effects on the quality of electricity in the grid, in particular, fluctuations, asymmetry and non-sinusoidal voltage.Known proposals for improving the electromagnetic compatibility of electric arc furnaces are mainly focused on eliminating the consequences of their negative impact on the power grid.The proposed approach and the corresponding technical solution are aimed at

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Michelin, Sébastien, and Olivier Doaré. "Energy harvesting efficiency of piezoelectric flags in axial flows." Journal of Fluid Mechanics 714 (January 2, 2013): 489–504. http://dx.doi.org/10.1017/jfm.2012.494.

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AbstractSelf-sustained oscillations resulting from fluid–solid instabilities, such as the flutter of a flexible flag in axial flow, can be used to harvest energy if one is able to convert the solid energy into electricity. Here, this is achieved using piezoelectric patches attached to the surface of the flag, which convert the solid deformation into an electric current powering purely resistive output circuits. Nonlinear numerical simulations in the slender-body limit, based on an explicit description of the coupling between the fluid–solid and electric systems, are used to determine the harve

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Balametov, A. B., and E. D. Halilov. "Simulation of Electric Networks Modes Using Steady-State and Heat Balance Equations." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 63, no. 1 (2020): 66–80. http://dx.doi.org/10.21122/1029-7448-2020-63-1-66-80.

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In the traditional calculations of the steady-state mode of the electrical network, the dependences of the active resistances of the overhead line wire on the ambient temperature and currents in the branches are not taken into account. However, the temperature is a function of the active power losses, the power losses are a function of the resistance and current, and the resistance is temperature dependent. Therefore, these relations should be related to the traditional equations for stationary regimes. In order to increase the accuracy of steady-state calculations, a temperature correction of

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Pereira, Polyanna Mara, Felipe Campelo, Takuya Mori, Hajime Igarashi, and Ricardo Adriano. "A passive SPICE model for rectennas." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 6 (2018): 1905–17. http://dx.doi.org/10.1108/compel-04-2017-0163.

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Purpose This paper aims to present a SPICE model to represent antennas in receiving mode. The model can be used to evaluate the performance of the antenna when it is coupled to several different nonlinear electric circuits. The proposed methodology is particularly suitable for rectenna applications, as it allows the analysis of different configurations for a rectenna more efficiently than using full-wave analysis simulators coupled directly to each rectifier circuit. Design/methodology/approach The model presented uses reciprocity theory to calculate the ideal voltage source of the Thevenin-eq

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Maria Devi Thanu, Arumuga, Muthukumar Devadoss, and Kumar Parasuraman. "Analysis of voltage and current magnification in resonant circuits on hyperspectral signal processing." Measurement and Control 53, no. 3-4 (2020): 635–48. http://dx.doi.org/10.1177/0020294019877495.

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In the recent years, electrical, electronics, and telecommunications have far-famed a rare improvement, the quantity of nonlinear loads has inflated. Many electric power consumption devices are sensitive to magnetic attraction disturbances, created through nearby devices, which might have an effect on the power quality for several industry units or may be domestic users. Poor quality of power leads to fault of devices and instrumentation instability in a short period. Systematically, some research and analysis are required to monitor the disturbances of power quality which increases quality of

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Vikharev, D. Yu, and N. A. Rodin. "Model of implicit pole electric machine based on mathematical formulation of magnetic field in air gap." Vestnik IGEU, no. 6 (December 28, 2021): 27–37. http://dx.doi.org/10.17588/2072-2672.2021.6.027-037.

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When modeling transient processes in electric power systems, the issue of designing reliable models of electrical machines is of great interest. The most difficult task is to design the models of synchronous and asynchronous machines. The purpose of the project is to develop mathematical models of synchronous and asynchronous machines based on a generalized model of an implicit-pole machine that considers the change of rotor speed, geometric shapes, and the type of rotor and stator windings. Methods of mathematical modeling of electromagnetic fields in the air gap based on Maxwell equations an

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Sabdenov, K. O. "A Numerical Method for Solving the Equations of Hydraulics and of Nonlinear Electric DC Circuits." Journal of Engineering Physics and Thermophysics 94, no. 1 (2021): 179–85. http://dx.doi.org/10.1007/s10891-021-02287-9.

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Andrejevic-Stosovic, Miona, Marko Dimitrijevic, Slobodan Bojanic, Octavio Nieto-Taladriz, and Vanco Litovski. "Characterization of nonlinear loads in power distribution grid." Facta universitatis - series: Electronics and Energetics 29, no. 2 (2016): 159–75. http://dx.doi.org/10.2298/fuee1602159a.

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Electronic devices are complex circuits, consisting of analog, switching, and digital subsystems that require direct current (DC) for polarization. Since they are connected to the mains delivering alternating current (AC), however, AC-to-DC converters are to be introduced between the mains and the electronics to be fed. A converter is an electric circuit containing several subsystems, the most important being the switch-mode power supply, drawing power from the mains in pulses hence it is highly nonlinear. That happens, in reduced amplitude, even when the electronics to be fed is switched off.

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Reva, Ihor, Oleh Todorov, and Maksim Bezzub. "Application of a neural network for determining the parameters of a transformer elimination circuit under the conditions of non-invasive monitoring." Electrical Engineering and Power Engineering, no. 1 (March 30, 2022): 19–29. http://dx.doi.org/10.15588/1607-6761-2022-1-2.

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Purpose. Application of a specially constructed neural network with the task of identifying the parameter substitution scheme in non-invasive monitoring conditions. Methodology. Use of electrical measurement methods by non-invasive monitoring, methods of identification and training of neural networks based on anterior and back propagation error, NARX networks. Findings. The power transformer is an important object of the power system of the electric shop substation. At the same time, frequent transitions from underload to partial overload mode are possible, which creates preconditions for the

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Alarfaj, Fawaz Khaled, Naveed Ahmad Khan, Muhammad Sulaiman, and Abdullah M. Alomair. "Application of a Machine Learning Algorithm for Evaluation of Stiff Fractional Modeling of Polytropic Gas Spheres and Electric Circuits." Symmetry 14, no. 12 (2022): 2482. http://dx.doi.org/10.3390/sym14122482.

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Fractional polytropic gas sphere problems and electrical engineering models typically simulated with interconnected circuits have numerous applications in physical, astrophysical phenomena, and thermionic currents. Generally, most of these models are singular-nonlinear, symmetric, and include time delay, which has increased attention to them among researchers. In this work, we explored deep neural networks (DNNs) with an optimization algorithm to calculate the approximate solutions for nonlinear fractional differential equations (NFDEs). The target data-driven design of the DNN-LM algorithm wa

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Kivanc, Omer Cihan, and Ozgur Ustun. "Investigation of Regenerative Braking Performance of Brushless Direct Current Machine Drive System." Applied Sciences 11, no. 3 (2021): 1029. http://dx.doi.org/10.3390/app11031029.

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The brushless direct current (BLDC) machines which are preferred in light electric vehicles (LEVs) come forward as high regenerative braking capability machines due to their permanent magnet excitation and relatively simple operation. In this paper, the regenerative braking capability limits of BLDC machines and their drive circuits are examined by taking into account nonlinear circuit parameters and battery internal resistance variation. During energy recovery from mechanical port to electrical port, the inverter of BLDC machine is operated as a boost converter which enables power flow to a b

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