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Journal articles on the topic 'Linear pulse electromechanical converter'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

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1

Bolyukh, V. F. "EFFECT OF ELECTRIC CONDUCTING ELEMENT ON INDICATORS OF LINEAR PULSE ELECTROMECHANICAL CONVERTER INDUCTION TYPE." Tekhnichna Elektrodynamika 2020, no. 3 (May 5, 2020): 22–29. http://dx.doi.org/10.15407/techned2020.03.022.

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2

Bolyukh, V. F., and I. S. Shchukin. "INFLUENCE OF AN EXCITATION SOURCE ON THE POWER INDICATORS OF A LINEAR PULSE ELECTROMECHANICAL CONVERTER OF INDUCTION TYPE." Tekhnichna Elektrodynamika 2021, no. 3 (April 19, 2021): 28–36. http://dx.doi.org/10.15407/techned2021.03.028.

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The purpose of the article is to evaluate the efficiency of an induction-type linear pulse electromechanical converter (LPEC) when operating in shock-power mode and excitation from an alternating voltage source (AVS) in comparison with excitation from a capacitive energy storage (CES). A mathematical model of an induction-type LPEC has been developed both when excited by a unipolar pulse from a CES and from an AVS using lumped parameters of the windings, which takes into account the interrelated electromagnetic, mechanical and thermal processes. It has been found that when the LPEC is excited from the AVS with a voltage frequency of 50 Hz, the electrodynamic force takes on a periodic decaying character with a significant prevalence of positive components of forces over negative ones. The maximum value of the force is much less, and the value of its impulse is much greater than in the LPEC, excited from the CES. With an increase in the frequency of the AVS voltage from 50 to 150 Hz, the highest value of the current density of the inductor winding decreases, and in the armature winding it increases. The greatest values of force and impulse of force are realized at a voltage frequency of 150 Hz. With an increase in the AVS frequency, the relative indicator of the efficiency of the LPEC increases. References 15, figures 4.

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3

Bolyukh, V. F., and I. S. Shchukin. "Influence of limiting the duration of the armature winding current on the operating indicators of a linear pulse electromechanical induction type converter." Electrical Engineering & Electromechanics, no. 6 (December 3, 2021): 3–10. http://dx.doi.org/10.20998/2074-272x.2021.6.01.

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Introduction. Linear pulse electromechanical converters of induction type (LPECIT) are used in many branches of science and technology as shock-power devices and electromechanical accelerators. In them, due to the phase shift between the excitation current in the inductor winding and the induced current in the armature winding, in addition to the initial electrodynamic forces (EDF) of repulsion, subsequent EDF of attraction also arise. As a result, the operating indicators of LPECIT are reduced. The purpose of the article is to increase the performance of linear pulse electromechanical induction-type converters when operating as a shock-power device and an electromechanical accelerator by limiting the duration of the induced current in the armature winding until its polarity changes. Methodology. To analyze the electromechanical characteristics and indicators of LPECIT, a mathematical model was used, in which the solutions of equations describing interrelated electrical, magnetic, mechanical and thermal processes are presented in a recurrent form. Results. To eliminate the EDF of attraction between the LPIECIT windings, it is proposed to limit the duration of the induced current in the armature winding before changing its polarity by connecting a rectifier diode to it. It was found that when the converter operates as a shock-power device without limiting the armature winding current, the value of the EDF pulse after reaching the maximum value decreases by the end of the operating cycle. In the presence of a diode in the armature winding, the efficiency criterion, taking into account the EDF pulse, recoil force, current and heating temperature of the inductor winding, increases. When the converter operates as an electromechanical accelerator without limiting the armature winding current, the speed and efficiency decrease, taking into account the kinetic energy and voltage of the capacitive energy storage at the end of the operating cycle. In the presence of a diode in the armature winding, the efficiency criterion increases, the temperature rise of the armature winding decreases, the value of the maximum efficiency increases, reaching 16.16 %. Originality. It has been established that due to the limitation of the duration of the armature winding current, the power indicators of the LPECIT increase when operating as a shock-power device and the speed indicators when the LPECIT operates as an electromechanical accelerator. Practical value. It was found that with the help of a rectifier diode connected to the multi-turn winding of the armature, unipolarity of the current is ensured, which leads to the elimination of the EDF of attraction and an increase in the performance of the LPECIT.

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4

Bolyukh, V. F., A. I. Kocherga, and I. S. Schukin. "ELECTROMECHANICAL PROCESSES IN A LINEAR PULSE-INDUCTION ELECTROMECHANICAL CONVERTER WITH A MOVABLE INDUCTOR AND TWO ARMATURES." Electrical Engineering & Electromechanics, no. 2 (April 10, 2018): 11–17. http://dx.doi.org/10.20998/2074-272x.2018.2.02.

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5

Bolyukh, V. F., Yu V. Kashanskyi, and I. S. Shchukin. "Influence of pulse excitation on electromechanical indicators of a linear pulse converter of electrodynamic type." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 3 (2020): 73–80. http://dx.doi.org/10.33271/nvngu/2020-3/073.

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6

Bolyukh, V. F., A. I. Kocherga, and I. S. Schukin. "INFLUENCE OF ARMATURE PARAMETERS OF A LINEAR PULSE ELECTROMECHANICAL CONVERTER ON ITS EFFICIENCY." Electrical Engineering & Electromechanics, no. 6 (November 27, 2017): 21–26. http://dx.doi.org/10.20998/2074-272x.2017.6.03.

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7

Bolyukh ,, V. F., A. I. Kocherga,, A. P. Mesenko,, and I. S. Shchukin. "INVESTIGATION OF LINEAR PULSE ELECTROMECHANICAL CONVERTERS OF COMBINED TYPE." ELECTRICAL AND COMPUTER SYSTEMS 27, no. 103 (June 26, 2018): 55–64. http://dx.doi.org/10.15276/eltecs.27.103.2018.06.

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8

Bolyukh, V. F., and I. S. Schukin. "INVESTIGATION OF THERMAL PROCESSES IN A LINEAR PULSE-INDUCTION ELECTROMECHANICAL CONVERTER OF CYCLIC ACTION." Electrical Engineering & Electromechanics, no. 5 (October 20, 2017): 14–22. http://dx.doi.org/10.20998/2074-272x.2017.5.02.

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9

Bolyukh, V. F., A. I. Kocherga, and I. S. Schukin. "INVESTIGATION OF A LINEAR PULSE-INDUCTION ELECTROMECHANICAL CONVERTER WITH DIFFERENT INDUCTOR POWER SUPPLY CIRCUITS." Electrical Engineering & Electromechanics, no. 1 (February 7, 2018): 21–28. http://dx.doi.org/10.20998/2074-272x.2018.1.03.

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10

Bolyukh, V. F., and I. S. Schukin. "AN OPTIMIZATION APPROACH TO THE CHOICE OF PARAMETERS OF LINEAR PULSE INDUCTION ELECTROMECHANICAL CONVERTER." Electrical Engineering & Electromechanics, no. 6 (December 12, 2018): 18–25. http://dx.doi.org/10.20998/2074-272x.2018.6.02.

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11

Bolyukh, V. F., S. V. Oleksenko, and I. S. Shchukin. "COMPARATIVE ANALYSIS OF LINEAR PULSE ELECTROMECHANICAL CONVERTERS ELECTROMAGNETIC AND INDUCTION TYPES." Tekhnichna Elektrodynamika 2016, no. 5 (September 6, 2016): 46–48. http://dx.doi.org/10.15407/techned2016.05.046.

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12

Bolyukh, V. F., A. A. Kocherga, and I. S. Shchukin. "COMPARATIVE ANALYSIS OF CONSTRUCTIVE TYPES OF COMBINED LINEAR PULSE ELECTROMECHANICAL CONVERTERS." Tekhnichna Elektrodynamika 2018, no. 4 (May 15, 2018): 84–88. http://dx.doi.org/10.15407/techned2018.04.084.

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13

Bolyukh, V. F., V. G. Dan’ko, and S. V. Oleksenko. "The Effect of an External Shield on the Efficiency of an Induction-Type Linear-Pulse Electromechanical Converter." Russian Electrical Engineering 89, no. 4 (April 2018): 275–81. http://dx.doi.org/10.3103/s106837121804003x.

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14

Mykhailenko, Vladyslav, Vadym Svyatnenko, Yuliya Chunyak, and Vladyslav Bachynskiy. "Research of processes in a converter with four-zone voltage regulation and electromechanical load." Bulletin of NTU "KhPI". Series: Problems of Electrical Machines and Apparatus Perfection. The Theory and Practice, no. 1 (5) (May 28, 2021): 39–41. http://dx.doi.org/10.20998/2079-3944.2021.1.07.

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The new mathematical models of the electromagnetic processes is designed in three-phase electric circuit of the semiconductor converters with many-server zoned regulation phases voltages disregarding losses in semiconductor commutator for quick estimation of the influence parameter loads on level and form of the output voltage. mathematical model of the semiconductor converter is also used for study of the connecting processes in semiconductor converter with actively-inductive load. Will develop the method multivariable function, what fall into algorithmic equations of the analysis formed and connecting processes in furcated electric circuit with semiconductor commutator and reactive element, toward account of the particularities of the use phase and linear voltages to network of the power supply. Analysis of the electromagnetic processes is organized beside this article in electric circuit with semiconductor commutator. Mathematical model is created for analysis electro-magnetic processes in semiconductor converter with width pulsed regulation of the output voltage. The broughted graphs, which reflect the electromagnetic processes in electric circuit. Method much parametric functions was used when performing calculation. The mathematical model of the converter is created for eleven zoned regulations of the output voltage. Article is devoted to the development of a method of multi-parametric modulating functions by means of working out of new mathematical models and definition of functions and the algorithmic equations for the analysis on sub-system components of electromagnetic processes in electric circuits of variable structure with sinusoidal, direct and pulsing voltage. Introduction of functions with discrete parameters in the algorithmic equations for analysis of processes in circuits with semiconductor commutators simplifies modeling on subsystem components. The mathematical model of steady-state processes and transients in electric circuits of semiconductor converters of modulation type with multi-channel zonal use of phase and line voltages of a three-phase network of power supplies is developed. The mathematical model of electric circuits of thyristor shapers of electro-discharge pulses for the analysis and the matching of capacitors charging modes with decrease several times of electric resistance of technological load is also created.

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15

Bolyukh, V. F., S. V. Oleksenko, and I. S. Schukin. "EFFICIENCY OF LINEAR PULSE ELECTROMECHANICAL CONVERTERS DESIGNED TO CREATE IMPACT LOADS AND HIGH SPEEDS." Electrical Engineering & Electromechanics, no. 3 (June 20, 2015): 31–40. http://dx.doi.org/10.20998/2074-272x.2015.3.05.

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16

Bolyukh, V. F., Yu A. Kashanskij, A. I. Kocherga, and I. S. Schukin. "INVESTIGATION OF LINEAR PULSE ELECTROMECHANICAL CONVERTER OF INDUCTION TYPE WITH DOUBLE ARMATURE INTENDED FOR DESTROYING INFORMATION ON SSD STORAGE DEVICE." Electrical Engineering & Electromechanics, no. 5 (October 15, 2018): 17–23. http://dx.doi.org/10.20998/2074-272x.2018.5.03.

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17

Bolyukh, V. F., Yu V. Kashanskyi, and I. S. Shchukin. "COMPARATIVE ANALYSIS OF POWER AND SPEED INDICATORS LINEAR PULSE ELECTROMECHANICAL CONVERTERS ELECTRODYNAMIC AND INDUCTION TYPES." Tekhnichna Elektrodynamika 2019, no. 6 (October 25, 2019): 35–42. http://dx.doi.org/10.15407/techned2019.06.035.

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18

Bolyukh, V. F., Yu V. Kashanskij, and I. S. Schukin. "INFLUENCE OF GEOMETRICAL PARAMETERS OF THE INDUCTOR AND ARMATURE ON THE INDICATORS OF A LINEAR PULSE ELECTROMECHANICAL CONVERTER OF AN ELECTRODYNAMIC TYPE." Electrical Engineering & Electromechanics, no. 3 (June 24, 2019): 11–17. http://dx.doi.org/10.20998/2074-272x.2019.3.02.

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19

Baida, Evgen, and Olena Korol. "Comparative analysis of electromechanical processes in induction-dynamic converter with mobile inductor and two disks." Bulletin of NTU "KhPI". Series: Problems of Electrical Machines and Apparatus Perfection. The Theory and Practice, no. 1 (5) (May 28, 2021): 3–7. http://dx.doi.org/10.20998/2079-3944.2021.1.01.

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General description of the research topic. The article presents a comprehensive study of traditional induction-dynamic mechanisms (with one disk and a fixed coil) and multi-core induction-dynamic mechanisms (linear pulse induction converters) with a movable coil and two disks. Actuality of the topic. Such induction-dynamic mechanisms are widely used in various fields, in particular, in electrical apparatus industry, where speed is one of the most important characteristics. The purpose of the article is a comparative analysis and refinement of the characteristics of the traditional induction-dynamic system with one disk and a fixed coil and multi-core one with a movable coil and two disks. Research method, scientific novelty. The calculations are based on the solution of the equations of the electromagnetic field and the equations for the electric circuit of the coil. Practical significance and main conclusions. During the calculations, the values of electromagnetic force and force impulse acting on the moving disk, energy losses in the system and electromagnetic energy of the system are determined. The results of the study are presented in the form of graphs, namely, the coil current and total magnetic energy for a traditional induction-dynamic mechanism with one disk and for multi-core one with two disks, Joule losses in a fixed coil and disk (in a traditional system) and in a moving coil and two disks (in a multi-core system), force impulse and electromagnetic force of a moving coil (in a multi-core system) and a moving disk (in a traditional and a multi-core system) total impulse of the moving parts of the induction-dynamic mechanism with a multi-core system, as well as the electromagnetic force and the total force acting on the moving parts of the induction-dynamic mechanism with a multi-core system. It is shown that the induction-dynamic mechanism with two disks is less effective in terms of electromagnetic force, impulse and electromagnetic energy than the induction-dynamic mechanism of the traditional layout.

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20

KIM, Konstantin K., and Aleksandr Yu PANYCHEV. "Innovative electrical engineering developed for the transport industry by the Emperor Alexander I Petersburg State Transport University." BULLETIN OF SCIENTIFIC RESEARCH RESULTS 2021, no. 4 (December 2021): 87–103. http://dx.doi.org/10.20295/2223-9987-2021-4-87-103.

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Objective: To familiarize the general scientific community with the latest electrotechnical innovative developments for the transport industry, carried out by the scientists of the Emperor Alexander I Petersburg State Transport University in the period from 2000 to 2021. Methods: We used the methods of calculation of electromagnetic fields and circuits, mathematical analysis, mathematical physics and numerical methods in the development of the described devices and systems. Results: 101 We developed a pipeline high-speed magnetolevitation transport system with vehicle movement in a rarefied atmosphere, a series of pantograph pantographs for heavy-loaded and high-speed trains using solid lubricants and a contactless method of transmitting electrical energy, a plasma device for fine cleaning of circuit boards for microcircuits, a device for creating a comfortable climate in office premises, electrohydroimpulse installations designed for loosening frozen coal in gondola cars in winter, shock tests of wagons, escalators and travalators using linear electric motors, high-speed electric switches-breakers, heat generators based on an electromechanical converter with the functions of a heater and pump, a wagon generator with a forced excitation system, a pulse voltage generator, allowing to measure the pulse resistance of the grounding conductors of the contact network supports, a complex of installations for various purposes using ozone technologies, a system for laser monitoring of the integrity of tanks, a device for diagnosing the degree of corrosion of the fittings of contact supports, an electrohydroimpulse installation for impact welding, treatment plants, technology for recycling car tires, security systems of the main trackbed. Practical importance: The use of the described developments will increase energy efficiency, energy saving and safety of production processes in transport

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21

Болюх, Володимир Федорович, and Ігор Сергійович Щукін. "Influence of the shape of the excitation pulse on the power and speed indicators of linear shock electromechanical converters of induction and electrodynamic types." Bulletin of NTU "Kharkiv Polytechnic Institute" Series: Electrical Machines and Electromechanical Energy Conversion, no. 3 (1357) (February 28, 2020): 8–14. http://dx.doi.org/10.20998/2409-9295.2020.3.02.

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22

Чемерис, Володимир Терентійович. "Pulsed electromechanical convereters of linear and rotational motion." Technology audit and production reserves 5, no. 1(7) (September 6, 2012): 9–10. http://dx.doi.org/10.15587/2312-8372.2012.4789.

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23

Ma, Qiu Fang. "Research on Key Technology for General-Purpose Electromechanical Controller." Advanced Materials Research 926-930 (May 2014): 1392–95. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.1392.

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In order to improve developing efficiency, a general-purpose electromechanical controller is designed based on MSP430F5438A.The paper analyzes the key technologies applied to improve the versatility and reliability. Before entering MCU’s A/D and counter module, external analog inputs of resistance, voltage, current and pulse from different sensors are processed by corresponding circuits. And digital input and output is isolated from the microcontroller by the photoelectric coupler. After appropriate operations, the controller can drive power equipments through the multi-channel precision current source composed of 12-bit D/A converter DAC7578 and V/I converter XTR115, and communicate with other equipments via RS485 bus. Furthermore, anti-interference methods by using watchdog, soft trap and reasonable wiring are studied in the paper. Tests show that the system is characterized with strong practicality and generality.

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24

Bolyukh, Vladimir F., Sergei V. Oleksenko, and Igor S. Shchukin. "FEATURES OF THE EXPERIMENTAL STUDY OF LINEAR ELECTROMECHANICAL CONVERTER OF IMPACT ACTION." ELECTRICAL AND COMPUTER SYSTEMS 22, no. 98 (May 25, 2016): 116–21. http://dx.doi.org/10.15276/eltecs.22.98.2016.20.

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25

Malev, N. A., O. V. Pogoditsky, and A. S. Malacion. "Q-tables formation method for automated monitoring of electromechanical converters parameters with application of linear integral criterion." Power engineering: research, equipment, technology 22, no. 2 (May 15, 2020): 86–97. http://dx.doi.org/10.30724/1998-9903-2020-22-1-86-97.

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In the process of functioning working sets with electromechanical converters included in their composition, it is necessary to take into account the influence of endogenous and exogenous disturbances that cause deviations of the parameters of electric machines from the nominal values given by the manufacturer in the appropriate documentation. These deviations of the parameters, even those within the permissible range of changes, have a noticeable effect on the quality of functioning of electromechanical converters and working sets as a whole. During the life cycle of the work of electromechanical converters, their parameters change as a result of natural wear and senescence, which necessitates continuous or periodic analysis and monitoring of the state objects under study. The paper considers a method based on the calculation of the linear integral criterion Q and the formation of Q – tables, which allows monitoring the functioning of electromechanical converters with unstable parameters during operation as part of working sets. Simulink – models of linear integral criterion calculation system and system of automated monitoring of electromechanical DC converter parameters are presented, which allow estimating unstable parameters. In these models static characteristics are implemented in tabular form reflecting the dependencies between the parameters of the electromechanical converters and the linear integral criterion. The results of the study allow us to obtain estimates of changes in the unstable parameters of electromechanical DC converters with the required accuracy.

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26

Poska, A. J., A. Smilgevičius, and R. Rinkevičienė. "Mechatronic Systems with Linear Induction Motors of Dampers." Solid State Phenomena 113 (June 2006): 67–72. http://dx.doi.org/10.4028/www.scientific.net/ssp.113.67.

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The purpose of the paper is, from the view of system engineering, to investigate mechatronic systems with uncontrolled or pulse controlled dampers that are equipped with a linear induction motor (LIM), the secondary element of which appears as a moving element of a damper. The main technological parameters determining the requirements for linear induction drives applied in the automatic protection and technological process control systems were investigated. Methods to investigate electromagnetic, electromechanical and thermal dynamic processes at pulse control of large cross-area dampers were proposed, and application of results of the investigation was considered.

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27

Alekseevskiy, Dmitriy, Olena Mikhailutsa, and Andriy Pozhuyev. "AVERAGED MODEL OF A BOOST–TYPE PULSE DC CONVERTER." TECHNICAL SCIENCES AND TECHNOLOGIES, no. 3(17) (2019): 168–74. http://dx.doi.org/10.25140/2411-5363-2019-3(17)-168-174.

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Urgency of the research. In the present paper, the questions of synthesis and application of the mathematical model of a boost-type DC converter, which has found widespread application in modern electrical devices and complexes, are considered. Target setting. Modeling of electrical complexes, which include semiconductor converters together with electromechanical, thermodynamic and other relatively slow processes, is faces the problem of a significant increase in simulation time. One way to solve this problem is to use the mathematical description of the semiconductor converter in the values averaged over the period of operation of the semiconductor switch. Actual scientific researches and issues analysis. In publications on this topic over the past few years, averaged models of DC converters of all basic types have been proposed. Both continuous and intermittent current modes are considered. Uninvestigated parts of general matters defining. In the models described in the publications, the continuous and intermittent current modes are considered as separate models in which ideal semiconductor switches are used. In addition, the adequacy of the models used is not given enough attention. The research objective. The objective of this work is to synthesize an averaged mathematical model of a boost-type DC converter, which would take into account the effect of direct voltage drops on the circuit elements in continuous and intermittent current modes, as well as assess the adequacy of applying the averaged approach. The statement of basic materials. In the article a description of an averaged mathematical model of a boost-type DC converter, which takes into account direct drops on the circuit elements and provides simulation both in continuous and intermittent current mode, is given. To confirm the performance and assess the adequacy of the proposed model, a joint simulation was performed using the proposed and reference (circuit) model, and its comparative analysis is given. Conclusions. The results of the comparative analysis confirmed the adequacy of the proposed model and revealed the occurrence of an error in the intermittent current mode, and also determined its cause.

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28

Олексенко, Сергій Володимирович. "Influence of the configuration of the anchor on efficiency of the linear electromechanical converter." Technology audit and production reserves 6, no. 1(8) (December 11, 2012): 29–30. http://dx.doi.org/10.15587/2312-8372.2012.5463.

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29

Bolyukh, V. F. "EXCITATION OF A PULSE ELECTROMECHANICAL CONVERTER OF ELECTRODYNAMIC TYPE FROM A TWO-SECTION CAPACITOR ENERGY STORAGE." Tekhnichna Elektrodynamika 2021, no. 2 (February 23, 2021): 58–66. http://dx.doi.org/10.15407/techned2021.02.058.

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A mathematical model of a pulsed electromechanical converter (PEC) of electrodynamic type has been developed, in which the solutions of the equations are presented in a recurrent form, which, when numerically implemented, allows taking into account the interrelated electrical, magnetic, mechanical and thermal processes and their nonlinear parameters. While maintaining the total energy of the pulsed source, the influence of the distribution of energy between the two sections of the capacitive energy storage (CES) and the voltage at which the additional section of the CES is connected was established. When operating in an accelerating mode, the largest amplitude of electrodynamic forces (EDF) and maximum speed occur in the basic version of the PEC, which is excited only from the main section of the CES, and the most effective is the PEC with the smallest capacity of the main section of the CES, and its maximum value is 2.61 higher than for the basic version of the PEC. When operating in the shock-power mode, compared with the basic version of the PEC, the amplitude of the EDF decreases. The most effective is the PEC with the smallest capacity of the main section of the CES, and its maximum value is 5.17 higher than that of the basic version of the PEC. Experimental studies of the PEC in the shock-power mode established that the oscillograms of the voltage of the CES and the current of the PEC correspond to the calculated characteristics, and their main indicators are consistent with each other with an accuracy of 5-7%. References 16, figures 6.

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30

Vadivu U., Senthil, and B. K. Keshavan. "Optimal Sizing of UPQC to Mitigate Power Quality Issues Using ANF Controller." International Journal of Engineering & Technology 7, no. 4.10 (October 2, 2018): 41. http://dx.doi.org/10.14419/ijet.v7i4.10.20703.

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A design of compact converter based Unified Power Quality Conditioner (UPQC) is proposed to alleviate the power quality issues on both linear and non-linear load by means of a four switch three phase series and shunt converter with DC link capacitor. DC-link voltage regulation is obtained by Photovoltaic based boost converter. The recommended four switch converter system not only reduces the switching losses but also the cost of the converter as well as it reduces the number of active elements. Balancing of capacitors leg, filters and transformer are chosen based on the amount of sag and swell magnitude. The proposed scheme is implemented using sinusoidal pulse width modulation, simple space vector pulse width modulation and PI-Fuzzy control strategy to verify power quality issues like sag, swell and harmonics compensation added with the control performances. The performance of the optimized system is validated through simulations using MATLAB/SIMULINK.

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31

Tatevosyan, A. A. "Optimization of parameters of quiet permanent magnet synchronous motor for linear drive of long-stroke single-stage piston compressor." Power engineering: research, equipment, technology 23, no. 6 (April 1, 2022): 148–56. http://dx.doi.org/10.30724/1998-9903-2021-23-6-148-156.

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The article proposes a solution to the problem of optimizing the magnetic system design of a low-speed synchronous motor with permanent magnets (PMSM) as a part of a linear drive of a single-stage piston compressor that is promising for use in compressor construction for a given law of motion of the moving part. The maximum efficiency of the electromechanical converter is used as an optimality criterion. By solving the optimization problem, the relationship between the design parameters and the energy performance of the PMSM was established in an analytical form. The substantiation of the maximum possible efficiency of the PMSM for the sinusoidal and non-sinusoidal laws of motion of the inductor is given.PURPOSE: Obtaining a solution to the problem of optimizing the magnetic system design of a low-speed PMSM as a part of a linear drive of a single-stage reciprocating compressor for a given law of motion of the moving part that meets the criterion of maximum efficiency of an electromechanical converter.METHODS: The methods of the theory of electromechanical energy converters, theoretical electrical engineering, mathematical modeling, optimization methods, variational, differential and integral calculus, as well as experimental methods are used.RESULTS: The results of an experimental study of the developed prototype of a low-speed SDPM as a part of a linear drive of a long-stroke single-stage reciprocating compressor are presented.CONCLUSION: The highest efficiency of the PMSM is achieved when the current in the armature winding changes with time in direct proportion to the speed of the inductor. To ensure this mode, it is proposed to use an open-source frequency converter, which makes it possible to implement the time dependence of the current in the armature winding in accordance with the given law of motion of the moving part. The PMSM is controlled by a frequency converter based on structural models created in the MexBios environment.

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32

Jing, Hailian, Naoki Maki, Tetsuya Ida, and Mitsuru Izumi. "Electromechanical Design of an MW Class Wave Energy Converter With an HTS Tubular Linear Generator." IEEE Transactions on Applied Superconductivity 28, no. 4 (June 2018): 1–4. http://dx.doi.org/10.1109/tasc.2018.2810298.

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33

Bolyukh, V. F., Yu V. Kashansky, and I. S. Schukin. "Features of excitation of a linear electromechanical converter of induction type from an AC source." Electrical Engineering & Electromechanics, no. 1 (February 23, 2021): 3–9. http://dx.doi.org/10.20998/2074-272x.2021.1.01.

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Purpose. The purpose of the article is to establish the basic laws of operation of induction-type linear electromechanical converter (LEMС) during operation in high-speed and shock-power modes and excitation from an AC source of increased frequency. Methodology. With the help of a mathematical model, the regularities of the course of processes in a LEMС, excited from an AC source, were established when working with shock-power and high-speed modes. The solutions of the equations of the mathematical model, which describe interrelated electrical, magnetic, mechanical and thermal processes, are presented in a recurrent form. Results. It was found that when the LEMC operates in the shock-power mode, the maximum value of the current in the inductor winding occurs in the first half-period, and in the inhibited armature winding in the second half-period. The electrodynamic force changes at twice the frequency, taking on both positive and negative values. Since the positive values exceed the negative ones, the magnitude of the impulse of the electrodynamic force increases with each period of the force. Depending on the initial voltage phase, the relative change in the magnitude of the force impulse is 1.5 %. It was found that when the LEMC operates in high-speed mode, the current in the inductor winding in the first half-period has the greatest value, but after several periods it takes on a steady state. The temperature rise of the inductor winding increases with the time of connection to the AC source, and the temperature rise of the armature winding has the nature of saturation. The electrodynamic force has an oscillatory character with strong damping and a significant predominance of the positive component. Depending on the initial phase of the voltage, the relative change in the maximum speed of the armature winding is 2.5 %. Originality. For the first time, a mathematical model of the LEMC, excited from an AC source, was developed, the solutions of the equations of which describe the interrelated electrical, magnetic, mechanical and thermal processes. For the first time, the regularities of the course of processes in LEMC were established when working with shock-power and high-speed modes. Practical value. The characteristics of LEMC are obtained, which determine the efficiency of work in shock-power and high-speed modes. It is shown that the initial voltage phase has no significant effect on the power, high-speed thermal performance of the converter excited from an alternating current source.

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Turchin, Pavel P. "Anisotropy of the Electromechanical Characteristics of SH-Waves and Lamb Waves in Yttrium Aluminum Borate Single Crystals." Journal of Siberian Federal University. Mathematics & Physics 15, no. 1 (January 2022): 80–87. http://dx.doi.org/10.17516/1997-1397-2022-15-1-80-87.

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The anisotropy of the electromechanical properties of SH-waves and Lamb waves in yttrium aluminum borates, which are nonmagnetic representatives of the RMe3(BO3)4 single crystals family (where R=Y, La-Lu; M=Fe, Al, Cr, Ga, Sc) with unique properties of magnetoelectrics and multiferroics, has been studied. In the process of the numerical simulation of the acoustic waves characteristics, the values of linear electromechanical constants of YAl3(BO3)4 single crystals, previously measured by ultrasonic pulse echo and quasi-static methods, have been used

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35

Kesucz, Flaviu-Nicolae. "Experimental Modeling of the Optimized Motion Control of Electromechanical Actuators Used in Thermal Power Plants." Carpathian Journal of Electronic and Computer Engineering 13, no. 3 (September 1, 2020): 30–40. http://dx.doi.org/10.2478/cjece-2020-0005.

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AbstractThe purpose of scientific research in this paper is to improve the operation of thermal power plants. The experimental stand for the study was made for testing, verifying and adjusting the dynamic parameters of the electromechanical actuators that are integrated in the gas valve component. In order to improve the performance of the thermal power plants by increasing the energetic, mechanical, electrical efficiency, this will be achieved through an alternating-alternative static converter, experimentally realizing the single-phase alternating voltage variable module. System optimization is to find new solutions for controlling the linear motion of electromechanical actuators, including the choice of working principles that would become patent proposals, or new research stands.

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Do, Hyun-Lark. "ZVS Full–Bridge Based DC–DC Converter with Linear Voltage Gain According to Duty Cycle." Journal of Electrical Engineering 64, no. 5 (September 1, 2013): 331–33. http://dx.doi.org/10.2478/jee-2013-0049.

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Abstract This paper presents a zero-voltage-switching (ZVS) full-bridge based DC-DC converter with linear voltage gain according to duty cycle. The proposed converter is based on an asymmetrical pulse-width-modulation (APWM) full-bridge converter which has various advantages over other converters. However, it has some drawbacks such as limited maximum duty cycle to 0.5 and narrow input range. The proposed converter overcomes these problems. The duty cycle is not limited and input voltage range is wide. Also, the ZVS operation of all power switches is achieved. Therefore, switching losses are significantly reduced and high-efficiency is obtained. Steady-state analysis and experimental results for the proposed converter are presented to validate the feasibility and the performance of the proposed converter.

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Bolyukh, Vladimir F. ,., Aleksandr, Kocherga, and Igor S. Shchukin. "MULTICRITERIAL SELECTION OF PARAMETERS OF THE EXTERNAL SCREEN OF A LINEAR PULSE ELECTROMECHANICAL TRANSDUCER." ELECTRICAL AND COMPUTER SYSTEMS 25, no. 101 (May 10, 2017): 106–16. http://dx.doi.org/10.15276/eltecs.25.101.2017.13.

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38

Bolyukh, V. F., S. V. Oleksenko, and I. S. Schukin. "EXPERIMENTAL STUDY OF FERROMAGNETIC CORE PARAMETERS INFLUENCE ON ELECTROMECHANICAL CHARACTERISTICS OF A LINEAR INDUCTION-DYNAMIC CONVERTER." Electrical Engineering & Electromechanics, no. 5 (October 14, 2014): 13–18. http://dx.doi.org/10.20998/2074-272x.2014.5.02.

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Janyavula, Deepthi, and Satyendra Nath Saxena. "Unbalanced Variable Nonlinear Load Compensation Using Multiple Shunt Active Filters." International Journal of Electrical and Computer Engineering (IJECE) 5, no. 5 (October 1, 2015): 896. http://dx.doi.org/10.11591/ijece.v5i5.pp896-904.

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<span>The proposed scheme has considered a three-phase four-wire system, which experienced sag and swell in source voltage for a certain period while feeding an unbalanced and variable non-linear load. The load has unequal resistive and reactive elements in the three phases, forming the unbalanced component. A three-phase silicon controlled rectifier converter with adjustable firing angle connected to the load has formed the variable non-linear component. This has been considered, so as to simulate the unbalanced and variable non-linear nature of loads in real-time power system. The trends in the total harmonic distortion variation were obtained for the proposed system under power factor correction and voltage regulation mode operation when the load-side converter firing angles of 30°, 60° and 90° were considered using MATLAB/SIMULINK software. Three pulse-width-modulation methods, namely, sinusoidal pulse-width-modulation, space vector modulation and hysteresis pulse-width-modulation have been used to generate pulses for the voltage source converter of the shunt active filter based on the reference currents generated using synchronous reference frame theory. It has been demonstrated in the proposed paper that power factor correction, voltage regulation, better harmonic reduction and hence load compensation are obtained simultaneously by using two SAFs.</span><br />

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Denysov, Yu O., and O. O. Bursala. "INFLUENCE OF THE SUPPLY VOLTAGE RIPPLE OF THE LINEAR ELECTRIC MOTOR ON THE PARAMETERS OF THE TRANSIENT RESPONSE OF THE CURRENT LOOP OF THE ON-BOARD AVIATION POSITIONING SYSTEM." Tekhnichna Elektrodynamika 2021, no. 6 (October 21, 2021): 20–28. http://dx.doi.org/10.15407/techned2021.06.020.

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A comparison of the parameters of the transient characteristics of the module-optimized closed-loop transfer current of the positioning system without taking into account and taking into account the deep pulse-width modulation of the supply voltage of the linear motor. Their essential difference on speed, overregulation, static error is established. A method of optimization according to the criterion of current circuit speed is proposed, which allows to realize its transient characteristic during a finite number of switching intervals of the pulse-width converter. The synthesis of a digital current loop controller is performed, it allows to realize its transient characteristic without over-regulation during a finite number of switching intervals. The results obtained are based on the transfer function of a pulse-width converter, which is a link in the current loop. It is obtained for the case of deep pulse-width modulation based on the statistical linearization of piecewise-linear modulation characteristics of the channels of the pulse-width converter model. The modulation characteristics are obtained as a result of the expansion of the latitude-modular voltage for multiple values of the control coordinate in the Walsh-Fourier series. The number of Walsh functions taken into account depends on the approximation error and the cutoff frequency of the system. References 11, figures 3.

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Zhu, Jian Hong, Shao Peng Yang, and Mei Feng Gao. "Design of Data Acquisition and Storage Circuit Based on Linear Array CCD." Applied Mechanics and Materials 556-562 (May 2014): 1652–55. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.1652.

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In order to ensure the linear array CCD normally and stably working in the spectral measurement, the data acquisition and storage circuit is presented. On the basis of analyzing the ILX511 driving timing, the circuit of data acquisition, processing, and storage based on CCD was designed. The CPLD was used to establish the correct sequence for the CCD clock pulse, AD converter clock, and FIFO writing signal, so the data acquisition, converter, and storage synchronously are achieved. The experiments show that the designed circuit is feasible.

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42

Aouani, Nedia, and Carlos Olalla. "Robust LQR Control for PWM Converters with Parameter-Dependent Lyapunov Functions." Applied Sciences 10, no. 21 (October 26, 2020): 7534. http://dx.doi.org/10.3390/app10217534.

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This paper presents a novel framework for robust linear quadratic regulator (LQR)-based control of pulse-width modulated (PWM) converters. The converter is modeled as a linear parameter-varying (LPV) system and the uncertainties, besides their rate of change, are taken into account. The proposed control synthesis method exploits the potential of linear matrix inequalities (LMIs), assuring robust stability whilst obtaining non-conservative results. The method has been validated in a PWM DC–DC boost converter, such that it has been shown, with the aid of simulations, that improved robustness and improved performance properties can be achieved, with respect to previously proposed approaches.

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43

Zhao, Wen, Sally Ahmed, Hossein Fariborzi, and Mohammad I. Younis. "Analytical and experimental study of the dynamics of a micro-electromechanical resonator based digital-to-analog converter." Journal of Micromechanics and Microengineering 31, no. 12 (November 3, 2021): 125010. http://dx.doi.org/10.1088/1361-6439/ac3219.

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Abstract In this paper, an analytical model of a micro-electromechanical (MEM) resonator used as a 4-bit digital-to-analog converter (DAC) is presented. First, we derive the dynamic equation of the 4-bit DAC device, and the nonlinear governing equation is solved by the Galerkin method combined with a shooting technique to simulate the static response, linear eigenvalue problem, and forced vibration response of the device for various electrostatic actuation cases. Also, we optimize the air gaps in the linear domain to ensure enhanced performance of the DAC. Further, to analyze the operation of the DAC in the nonlinear regime, two experimental samples powered by −2 dBm and −12 dBm AC inputs are examined. Forward and backward frequency sweeps are conducted experimentally and analytically. The proposed analytical results are validated by comparison with experimental data. The results indicate that the presented modeling, simulations, and optimization are effective tools for the design of MEM resonator-based circuits.

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44

Sengupta, R. N. "A widely linear temperature to frequency converter using a thermistor in a pulse generator." IEEE Transactions on Instrumentation and Measurement 37, no. 1 (March 1988): 62–65. http://dx.doi.org/10.1109/19.2665.

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45

Kodama, Takahiro, Naoya Wada, Gabriella Cincotti, and Ken-ichi Kitayama. "Tunable optical code converter using XPM and linear-slope pulse streams generated by FBGs." Optics Letters 39, no. 2 (January 13, 2014): 355. http://dx.doi.org/10.1364/ol.39.000355.

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46

García, Nicolás Toro, Yeison Alberto Garcés Gomez, and Vladimir Henao Cespedes. "Robust control technique in power converter with linear induction motor." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 1 (March 1, 2022): 340. http://dx.doi.org/10.11591/ijpeds.v13.i1.pp340-347.

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Induction motors are widely used in industrial applications as actuators, thanks to their simplicity of construction, which is subsequently reflected in low-cost maintenance. This paper shows the behavior of a three-phase power converter with a linear induction motor (LIM) as load, using a quasi-sliding control technique for output voltage regulation and a new control technique to control chaos. Digital pulse width modulation (DPWM) techniques are widely used to control electronic power converters. The controller proposed in this paper was designed using zero average dynamic (ZAD) and fixed point inducting control (FPIC) techniques. The ZAD-FPIC control strategy was designed and applied to a three-phase converter with linear induction motor load. Since it is not possible to measure the secondary currents, a secondary current observer was included in the system. Finally, bifurcation diagrams are shown as a technique for tuning controller parameters in ZAD-FPIC controllers. For the illustration of numerical results a simulation of the linear induction motor drive controlled was made by MATLAB/Simulink. The designs were tested in a rapid control prototyping (RCP) system based on digital signal processing (DSP) for dSPACE platform, using the 1103 controller card and control desk interface.

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47

Angulo, Fabiola, Enric Fossas, Tere M. Seara, and Gerard Olivar. "Bounding the Output Error in a Buck Power Converter Using Perturbation Theory." Mathematical Problems in Engineering 2008 (2008): 1–20. http://dx.doi.org/10.1155/2008/732039.

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We show the main results obtained when applying the average theory to Zero Average Dynamic control technique in a buck power converter with pulse-width modulation (PWM). In particular, we have obtained the bound values for output error and sliding surface. The PWM with centered and lateral pulse configurations were analyzed. The analytical results have confirmed the numerical and experimental results already obtained in previous publications. Moreover, through an important lemma, we have generalized the theory for any stable second-order system with relative degree 2, using properties related to transformations and stability of linear systems.

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Gohar Ali, Hina, Ramon Vilanova Arbos, Jorge Herrera, Andrés Tobón, and Julián Peláez-Restrepo. "Non-Linear Sliding Mode Controller for Photovoltaic Panels with Maximum Power Point Tracking." Processes 8, no. 1 (January 14, 2020): 108. http://dx.doi.org/10.3390/pr8010108.

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In this paper, nonlinear sliding mode control (SMC) techniques formulated for extracting maximum power from a solar photovoltaic (PV) system under variable environmental conditions employing the perturb and observe (P and O) maximum power point tracking (MPPT) technique are discussed. The PV system is connected with load through the boost converter. A mathematical model of the boost converter is derived first, and based on the derived model, a SMC is formulated to control the gating pulses of the boost converter switch. The closed loop system stability is verified through the Lyapunov stability theorem. The presented control scheme along with the solar PV system is simulated in MATLAB (matric laboratory) (SMC controller and PWM (Pulse Width Modulation) part) and PSIM (Power electronics simulations) (solar PV and MPPT algorithm) environments using the Simcoupler tool. The simulation results of the proposed controller (SMC) are compared with the classical proportional integral derivative (PID) control scheme, keeping system parameters and environmental parameters the same.

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Lu, Jing, and Ming Shen. "Research on Limit-Trajectory Over-Modulation Strategy of Two Stage Matrix Converter." Applied Mechanics and Materials 599-601 (August 2014): 1648–51. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.1648.

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Aim at solving the problem is poor quality of waveforms and that of complicated modulation strategy in two stage matrix converter. The method is that Limit-Trajectory over-modulation strategy is adopted in inverter to ensure linear modulation in all over-modulation regions and space vector pulse width modulation is adopted in rectifier. This simpler control algorithm reduces memory space and linear calculation is instead of look-up table. Simulation show that the voltage transfer ratio can be improved from 0.866 to 0.95 and the quality of output waveforms is greatly enhanced.

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Pikulin, Dmitry. "Nonlinear Dynamics of Buck Converter." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 2 (August 5, 2015): 156. http://dx.doi.org/10.17770/etr2011vol2.997.

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This paper is concerned with the problem of modeling and simulation of piecewise linear systems with the pulse width modulation control. Models of this kind of systems are widely used in engineering practice, in particular in power electronic converters. The research provides the study of chaos and bifurcations in one of the switching converters – step-down converter under voltage mode control, operating in discontinuous and continuous current modes, using Matlab and Simulink simulation environment. Various types of models, including discrete – time maps, switched state – space models are examined in order to detect their suitability and reliability in numerical investigation of nonlinear phenomena in DC–DC converters. Some analytical methods for the search of periodic regimes and their stability estimation were also used in order to validate numerically obtained results and evaluate the accuracy of models used. As direct simulation does not accurately pinpoint bifurcation points and computes only stable invariant sets, some aspects and advantages of numerical path-following are also discussed.

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