Engineering › Mechanical Engineering

Induction Heating and Inverter Technology

Works Count: 32892

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Description

This cluster of papers covers the technology, control algorithms, and applications of induction heating, with a focus on resonant inverters, high-frequency applications, efficiency optimization, and thermal analysis. It explores various aspects such as domestic appliances, power electronics, multi-coil systems, and induction cooking.

Keywords

Induction Heating; Resonant Inverters; High-Frequency Applications; Efficiency Optimization; Control Algorithms; Domestic Appliances; Thermal Analysis; Power Electronics; Multi-Coil Systems; Induction Cooking

Inductors and Transformers for Power Electronics

2010-02-17

Vencislav Cekov Valchev , Alex Van den Bossche

Although they are some of the main components in the design of power electronic converters, the design of inductors and transformers is often still a trial-and-error process due to a … Although they are some of the main components in the design of power electronic converters, the design of inductors and transformers is often still a trial-and-error process due to a long working-in time for these components. Inductors and Transformers for Power Electronics takes the guesswork out of the design and testing of these systems and provides a broad overview of all aspects of design.Inductors and Transformers for Power Electronics uses classical methods and numerical tools such as the finite element method to provide an overview of the basics and technological aspects of design. The authors present a fast approximation method useful in the early design as well as a more detailed analysis. They address design aspects such as the magnetic core and winding, eddy currents, insulation, thermal design, parasitic effects, and measurements. The text contains suggestions for improving designs in specific cases, models of thermal behavior with various levels of complexity, and several loss and thermal measurement techniques.This book offers in a single reference a concise representation of the large body of literature on the subject and supplies tools that designers desperately need to improve the accuracy and performance of their designs by eliminating trial-and-error.

Conduction heat transfer

1967-07-01

J. H. Whitelaw

GaAs Devices and Circuits

1987-01-01

M. S. Shur

Analysis and Computation of Electric and Magnetic Field Problems

1973-01-01

K.J. Binns , P.J. Lawrenson

Analysis and simulation of semiconductor devices

1985-04-01

S. Selberherr

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High-Frequency Magnetic Components

2009-11-02

Marian K. Kazimierczuk

If you are looking for a complete study of the fundamental concepts in magnetic theory, read this book. No other textbook covers magnetic components of inductors and transformers for high-frequency … If you are looking for a complete study of the fundamental concepts in magnetic theory, read this book. No other textbook covers magnetic components of inductors and transformers for high-frequency applications in detail. This unique text examines design techniques of the major types of inductors and transformers used for a wide variety of high-frequency applications including switching-mode power supplies (SMPS) and resonant circuits. It describes skin effect and proximity effect in detail to provide you with a sound understanding of high-frequency phenomena. As well as this, you will discover thorough coverage on: integrated inductors and the self-capacitance of inductors and transformers, with expressions for self-capacitances in magnetic components; criteria for selecting the core material, as well as core shape and size, and an evaluation of soft ferromagnetic materials used for magnetic cores; winding resistance at high frequencies; expressions for winding and core power losses when non-sinusoidal inductor or transformer current waveforms contain harmonics. Case studies, practical design examples and procedures (using the area product method and the geometry coefficient method) are expertly combined with concept-orientated explanations and student-friendly analysis. Supplied at the end of each chapter are summaries of the key concepts, review questions, and problems, the answers to which are available in a separate solutions manual. Such features make this a fantastic textbook for graduates, senior level undergraduates and professors in the area of power electronics in addition to electrical and computer engineering. This is also an inimitable reference guide for design engineers of power electronics circuits, high-frequency transformers and inductors in areas such as (SMPS) and RF power amplifiers and circuits.

Power electronics: circuits, devices, and applications

1989-02-01

Muhammad H. Rashid

1. Introduction. 2. Power Semiconductor Diodes and Circuits. 3. Diode Rectifiers. 4. Power Transistors. 5. DC-DC Converters. 6. Pulse-width Modulated Inverters. 7. Thyristors. 8. Resonant Pulse Inverters. 9. Multilevel Inverters. … 1. Introduction. 2. Power Semiconductor Diodes and Circuits. 3. Diode Rectifiers. 4. Power Transistors. 5. DC-DC Converters. 6. Pulse-width Modulated Inverters. 7. Thyristors. 8. Resonant Pulse Inverters. 9. Multilevel Inverters. 10. Controlled Rectifiers. 11. AC Voltage Controllers. 12. Static Switches. 13. Flexible AC Transmission Systems. 14. Power Supplies. 15. DC Drives. 16. AC Drives. 17. Gate Drive Circuits. 18. Protection of Devices and Circuits. Appendices: Three-phase Circuits, Magnetic Circuits, Switching Functions of Converters, DC Transient Analysis, Fourier Analysis, Thyristor Commutation Techniques, Data Sheets.

Introduction to Power Electronics

1998-01-01

Daniel W. Hart

MATHEMATICAL FORMULATION AND TYPE CURVES FOR INDUCED POLARIZATION

1959-07-01

Harold O. Seigel

A basic mathematical formulation is developed for overvoltage and other induced polarization phenomena. Starting from the fundamental representation of a volume dipolar distribution, one is led to the concept of … A basic mathematical formulation is developed for overvoltage and other induced polarization phenomena. Starting from the fundamental representation of a volume dipolar distribution, one is led to the concept of a change in apparent conductivity due to polarization effects. The mathematical solution of induced polarization phenomena, therefore, reduces to the appropriate solution of Laplace’s equation for the same geometry and conductivity distribution ignoring polarization, followed by partial differentiation of the apparent resistivity function so determined. The dielectric constants of the media are not involved in the solution. As examples of the use of the representation, the response of a polarizable sphere and of a polarizable lower layer in a typical two‐layer case are presented. Actual field results are shown illustrating the use of the latter solution.

Theory and Application of the Z-Transform Method

1965-01-01

K.W. Cattermole

The Use of Harmonic Distortion to Increase the Output Voltage of a Three-Phase PWM Inverter

1984-09-01

J.A. Houldsworth , Duncan A Grant

By adding a measure of third harmonic to the output of each phase of a three-phase inverter, it is possible to obtain a line-to-line output voltage that is 15 percent … By adding a measure of third harmonic to the output of each phase of a three-phase inverter, it is possible to obtain a line-to-line output voltage that is 15 percent greater than that obtainable when pure sinusoidal modulation is employed. The line-to-line voltage is undistorted. The method permits the inverter to deliver an output voltage approximately equal to the voltage of the ac supply to the inverter. Thus an induction motor of standard rating with respect to the ac supply to the inverter can deliver very nearly full power at rated speed when supplied from the inverter. This is achieved without pulse dropping or any other form of mode-changing.

Inductance Calculations Working Formulas and Tables

1964-01-01

J. N. Snyder , Frederick C. Grover

This authoritative compilation of formulas and tables simplifies the design of inductors for electrical engineers. It features a single simple formula for virtually every type of inductor, together with tables … This authoritative compilation of formulas and tables simplifies the design of inductors for electrical engineers. It features a single simple formula for virtually every type of inductor, together with tables from which essential numerical factors may be interpolated. An esteemed reference, it belongs in the library of every electrical engineer. 1946 edition.

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Reactive Power Generation and Control by Thyristor Circuits

1979-09-01

Laszlo Gyugyi

Generally, static var generators function as variable reactances (capacitive or inductive impedances) or controllable ac current and voltage sources. Possible methods of var generation and control by static thyristor circuits … Generally, static var generators function as variable reactances (capacitive or inductive impedances) or controllable ac current and voltage sources. Possible methods of var generation and control by static thyristor circuits are reviewed, and new approaches are described in which power frequency changers (cycloconverters) are employed. Oscillographic recordings illustrate the operation and performance of practical systems, including a 35-Mvar arc furnace compensator.

Dyadic green functions in electromagnetic theory

1994-01-01

Chen‐To Tai , Ieee Antennas , Ieee Microwave Theory

Theory and Application of the Z-Transform Method

1965-10-01

Richard Bellman , E.I. Jury

Some Broad-Band Transformers

1959-08-01

C. L. Ruthroff

Several transmission line transformers are described which have bandwidth ratios as high as 20,000:1 in the frequency range of a few tens of kilocycles to over a thousand megacycles. Experimental … Several transmission line transformers are described which have bandwidth ratios as high as 20,000:1 in the frequency range of a few tens of kilocycles to over a thousand megacycles. Experimental data are presented on both transformers and hybrid circuits. Typical applications are: interstage transformers for broad-band amplifiers; baluns for driving balanced antennas and broad-band oscilloscopes; and hybrids for use in pulse reflectometers, balanced modulators, etc. These transformers can be made quite small. Excellent transformers have been made using ferrite toroids having an outside diameter of 0.080 inch.

Waveform Distortion and Correction Circuit for PWM Inverters with Switching Lag-Times

1987-09-01

Yoshihiro Murai , Tomofumi Watanabe , Harumitu Iwasaki

The switching lag-time that prevents the phase shortage of inverter arms causes serious waveform distortions and fundamental voltage drops in pulsewidth-modulated inverter output. Distortions in the PWM inverter-fed induction motor … The switching lag-time that prevents the phase shortage of inverter arms causes serious waveform distortions and fundamental voltage drops in pulsewidth-modulated inverter output. Distortions in the PWM inverter-fed induction motor system over the various frequencies of the carrier are investigated and a correction circuit with PWM potential feedback is proposed; the effectiveness of that circuit is shown by experiments.

Induction Heating Technology and Its Applications: Past Developments, Current Technology, and Future Challenges

2013-09-11

Óscar Lucía , Pascal Maussion , E.J. Dede +1 more

Induction heating (IH) technology is nowadays the heating technology of choice in many industrial, domestic, and medical applications due to its advantages regarding efficiency, fast heating, safety, cleanness, and accurate … Induction heating (IH) technology is nowadays the heating technology of choice in many industrial, domestic, and medical applications due to its advantages regarding efficiency, fast heating, safety, cleanness, and accurate control. Advances in key technologies, i.e., power electronics, control techniques, and magnetic component design, have allowed the development of highly reliable and cost-effective systems, making this technology readily available and ubiquitous. This paper reviews IH technology summarizing the main milestones in its development and analyzing the current state of art of IH systems in industrial, domestic, and medical applications, paying special attention to the key enabling technologies involved. Finally, an overview of future research trends and challenges is given, highlighting the promising future of IH technology.

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Transformer and Inductor Design Handbook

2011-05-23

Colonel Wm. T. McLyman

Nonlinear Phenomena in Power Electronics

2001-01-01

Soumitro Banerjee , George C. Verghese

Control in Power Electronics: selected problems

2002-01-01

Marian P. Kaźmierkowski , R. Krishnan , Frede Blaabjerg

Numerical and Machine Solutions of Transient Heat-Conduction Problems Involving Melting or Freezing: Part I—Method of Analysis and Sample Solutions

1959-05-01

William D. Murray , Fred Landis

Previously published methods for the solution of one-dimensional heat-conduction problems with melting or freezing are briefly reviewed and weaknesses of previous analytic and numerical methods are outlined. Two new and … Previously published methods for the solution of one-dimensional heat-conduction problems with melting or freezing are briefly reviewed and weaknesses of previous analytic and numerical methods are outlined. Two new and more generally applicable numerical methods, applicable to digital and analog computation, are developed in the paper. Sample problems using these new techniques are solved and compared with the results of a widely used conventional method. An evaluation of the various methods and recommendations on areas of application are included.

Pulse Width Modulation for Power Converters

2003-01-01

D.G. Holmes , T.Α. Lipo

Fundamentals of Power Electronics

2003-12-12

William Linda , Richard Lidija , Stevan Nikola

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Fundamentals of Power Electronics

2001-01-01

Robert W. Erickson , Dragan Maksimović

Handbook of Induction Heating

2002-12-17

Valery Rudnev , Don Loveless , Raymond L. Cook +1 more

Handbook of Induction Heating

2017-07-14

Valery Rudnev , Don Loveless , Raymond L. Cook

The second edition of the Handbook of Induction Heating reflects the number of substantial advances that have taken place over the last decade in theory, computer modeling, semi-conductor power supplies, … The second edition of the Handbook of Induction Heating reflects the number of substantial advances that have taken place over the last decade in theory, computer modeling, semi-conductor power supplies, and process technology of induction heating and induction heat treating. This edition continues to be a synthesis of information, discoveries, and technical insights that have been accumulated at Inductoheat Inc. With an emphasis on design and implementation, the newest edition of this seminal guide provides numerous case studies, ready-to-use tables, diagrams, rules-of-thumb, simplified formulas, and graphs for working professionals and students.

Conduction Heat Transfer

2002-08-29

P. J. Schneider

Complex Behavior of Switching Power Converters

2003-07-28

Chi K. Tse

Power electronics is a discipline spawned by real-life applications in industrial, commercial, residential and aerospace environments. Much of its development evolves around some immediate need for solving specific power conversion … Power electronics is a discipline spawned by real-life applications in industrial, commercial, residential and aerospace environments. Much of its development evolves around some immediate need for solving specific power conversion problems. This comprehensive book focuses on the typical bifurcation scenarios and nonlinear behavior observed in swit

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Induction heating handbook

1979-01-01

J R Davies , Peter Simpson

Induction heating handbook , Induction heating handbook , کتابخانه دیجیتالی دانشگاه علوم پزشکی و خدمات درمانی شهید بهشتی Induction heating handbook , Induction heating handbook , کتابخانه دیجیتالی دانشگاه علوم پزشکی و خدمات درمانی شهید بهشتی

Control in Power Electronics

2002-01-01

Lars Helle , Frede Blaabjerg

Introduction to Medium- and High-Power Switching Converters

2025-06-24

Dorin O. Neacșu | CRC Press eBooks

Resonant Three-Phase Converters

2025-06-24

Dorin O. Neacșu | CRC Press eBooks

Predictive Simulation of Induction Heating for Unidirectional Thermoplastic Composites – Characterisation, Validation and Process Sensitivity

2025-06-23

Y.M. Buser , E.T.M. Krämer , Remko Akkerman +1 more | SAMPE JOURNAL

Advancing induction welding for unidirectional (ud) tape-based thermoplastic composites (tpcs) requires predictive capabilities regarding the heating response through physics-based numerical simulation. This research focuses on modelling induction heating enabled by … Advancing induction welding for unidirectional (ud) tape-based thermoplastic composites (tpcs) requires predictive capabilities regarding the heating response through physics-based numerical simulation. This research focuses on modelling induction heating enabled by accurate characterisation of the orthotropic electrical conductivity tensor. The obtained material data was used in comsol Multiphysics® for simulating the induction heating response of various ud-ply based lay-ups. These simulations were validated experimentally using infrared thermography. Furthermore, the validated model enabled a sensitivity analysis of the induction heating patterns, significantly enhancing our understanding of the origins of process sensitivity in induction welding and suggesting strategies to the industry for improving process stability.

Optimal control of induction heating of steel workpieces with respect to minimal scale formation criteria

2025-06-22

Yu. Е. Pleshivtseva , А. В. Попов , Darya Dadabaeva | Vestnik of Samara State Technical University Technical Sciences Series

Efficiency of heat treatment production processes of metals is measured by different characteristics, including productivity, energy consumption and quality of end product. Increasing each of them is possible through optimization … Efficiency of heat treatment production processes of metals is measured by different characteristics, including productivity, energy consumption and quality of end product. Increasing each of them is possible through optimization with respect to corresponding integral criteria. The quality of end product, which is made of high iron alloys, after heat treatment operations depends on metal loss to scale, that is inevitably formed during high-intensity heating in induction installation. Thus, to reduce the amount of defective details it is necessary to obtain the optimal operating mode of inductor, which will minimize the mentioned losses. The paper is devoted to optimization of static induction heating of steel cylindrical billets before the subsequent plastic deformation operations. The 2D numerical mathematical model of induction heating process, developed in Altair FLUX, is considered as a control object with distributed parameters. The optimal control problems with respect to time-optimal, minimal energy consumption and minimal scale formation criteria are formulated. The solution of formulated problems after their parametrization and reduction to semi-infinite optimization problems can be carried out using alternance method of parametric optimization of objects with distributed parameters. As an example for minimal scale formation problem, the system of transcendental equations closed with respect to all unknowns of the heating process is written based on alternance method. Solving of the system is provided by automatized procedure, which is developed in program package MATLAB. The analysis of numerical results shows that solving this one-criteria optimal control problem allows to reduce the amount of scale with significant increasing of heating time in comparison with time-optimal and minimal energy consumption problems. That is why on the next stages of the investigation it is planned to solve a multi-criteria optimization problem in order to take onto account several typical goal functions simultaneously.

SELECTABLE STRENGTH IN THE LONGITUDINAL DIRECTION OF STEEL BAR REALIZED BY PARTIAL INDUCTION HARDENING

2025-06-19

Yuan Liu , Minehiro Nishiyama , Hiroyuki Nakano | AIJ Journal of Technology and Design

THE CONTROL PROBLEM ASSOCIATED WITH HEATING PROCESS OF A ROD

2025-06-19

F.N. Dekhkonov | International Journal of Mathematics and Physics

In this paper, the control problem for a heat conduction equation with periodic boundary condition is considered. The solution with the control function on the border of the rod is … In this paper, the control problem for a heat conduction equation with periodic boundary condition is considered. The solution with the control function on the border of the rod is given. The constraints on the control are determined to ensure that the average value of the solution within the considered domain attains a given value. The considered control problem is reduced to the Volterra integral equation, which is the first type, using the Fourier method. The proof of the existence of admissible control is related to the existence of a solution of the integral equation. The existence of the solution of the integral equation is shown using the Laplace transform method and the admissibility of the solution is proved. In the last section, the control function needed to achieve the average temperature given certain values of the parameters is found. Keywords: heat conduction equation, average temperature, periodic boundary condition, control problem, Volterra integral equation, Laplace transform.

Analysis of Symmetrical Components Due to Application of Three-Phase Reactor Type SFCL into a Power Distribution System with an Induction Motor

2025-06-16

Min-Ho Yoon , Seung-Su Choi , Sung-Hun Lim | The Transactions of The Korean Institute of Electrical Engineers

Research of thermal processes of an IGBT module-based inverter

2025-06-14

S. P. Lushchin , D.P. Paxar | Electrical Engineering and Power Engineering

Purpose. Study of thermal processes of an inverter based on an IGBT module for used in a frequency converter to control the operation of an asynchronous motor. Methodology. Analytical and … Purpose. Study of thermal processes of an inverter based on an IGBT module for used in a frequency converter to control the operation of an asynchronous motor. Methodology. Analytical and computational methods to analyse thermal processes of an inverter based on an IGBT module. Findings. The study of thermal processes of the SKM200GB12T4 inverter based on the IGBT module was performed using the SemiSel program. A mathematical model of the cooling process of the SKM200GB12T4 inverter was developed. The dependence of the dynamic thermal impedance Zth(s-a) on time, which is described by an exponential function, was obtained. The value of the time constant for this dependence, which characterizes the rate of change in the cooler temperature, i.e. the quality of its operation, has been calculated. The thermal time constant τ = 1.44 s indicates the time required to reach a temperature difference of approximately 63% of its stationary value. This low value reflects the effective cooling due to the high air flow velocity (7 m/s) and air flow rate (426.43 m³/h), which is critically important for maintaining the IGBT junction temperature below 175 °C during overload. The values of the inverter temperature maxima during overload were obtained. For an overload of 10.94 seconds, the maximum temperature for IGBT transistors is 120.85 °C, and for diodes – 123.4 °C. The case temperature Tc = 71.21 °C and the radiator temperature Ts = 63.56 °C remain the same for transistors and diodes and do not exceed the maximum operating temperature of the module due to the stability of the cooling system. However, overheating can increase with prolonged loading, resulting in the degradation of semiconductor devices. The temperature and power variation processes at nominal load and in overload mode for one period have been studied using the SemiSel program. The temperature change graphs reflect the stability of the temperature at various points, such as the transitions of IGBT transistors and reverse diodes, due to effective thermal control. The power graph indicates cyclical changes in losses, with peaks in the phases where current and voltage are maximum. These data confirm the suitability of the module for use in control circuits. Originality. Based on the graphical analysis of the kinetic dependencies of temperature and inverter power, a mathematical model of the cooling process of the SKM200GB12T4 inverter was developed, that describes the dependence of the dynamic thermal impedance Zth(s-a) on time. The thermal time constant for this dependence, which characterises the rate of change of the cooler temperature, was calculated. Practical value. The results of the study of the thermal characteristics of the SKM200GB12T4 inverter can be used to optimize the operating modes of the frequency converter for controlling the operation of an asynchronous motor.

Study on the method for generating inflow conditions &lt;?A3B2 pi6?&gt;with large distortion for an afterburner

2025-06-01

Mingyang Sun , Chih‐Wei Hu , Chenhao WAN +2 more | Ranqi wolun shiyan yu yanjiu.

Equivalencing Technique for Large-Scale Power Systems in EMT Analysis

2025-05-31

Hongguang Jin , Jinyoung Choi , Se‐Wook Oh +3 more | The Transactions of The Korean Institute of Electrical Engineers

Analysis of Output Distortions in SPMSM Drives Considering Motor and Inverter Hardware Characteristics

2025-05-31

E. Y. Kim , Minsu Kim , Sehwan Kim +1 more | The Transactions of The Korean Institute of Electrical Engineers

Numerical investigation of gold melting in an induction crucible furnace: a parametric study of electromagnetic and thermal characteristics using finite volume method

2025-05-30

Zine Rezgui , Ammar Tibouche , Nabil Ikhlef | Gold bulletin

Minimalizacja strat w wysokoobrotowych silnikach PM BLDC przez wykorzystanie nowoczesnych materiałów magnetycznych w stojanie i zmianę konstrukcji wirnika

2025-05-30

Marek HRECZKA | PRZEGLĄD ELEKTROTECHNICZNY

Design and Implementation of a Single-phase Inverter with Technology of Sinusoidal Pulse Width Modulation

2025-05-29

Cheng‐Tao Tsai , C.F. Weng | Sensors and Materials

A novel solids-based electro-thermal energy storage system utilizing electromagnetic induction: Conceptual design and theoretical analysis

2025-05-28

Weiqin Lu , Xueyu Tang , Yang Zhang +5 more | Energy Conversion and Management

Real Time Impact of Voltage Variation on Variable Frequency Transformer during Asynchronous Power Transfer

2025-05-28

Iqra Javid , Sami Jan Lolu , I. Nawaz +1 more | Engineering Research Express

Abstract Nowadays, Variable Frequency Transformer (VFT) has gained significant interest for regulating power transfer between two asynchronous networks. VFT is a controllable, bidirectional transmission device which integrates the principles of … Abstract Nowadays, Variable Frequency Transformer (VFT) has gained significant interest for regulating power transfer between two asynchronous networks. VFT is a controllable, bidirectional transmission device which integrates the principles of both rotatory transformer and phase shifting transformer, in order to regulate the power flow between two power grids. The research studies indicate that, the operation of VFT has previously only been studied under constant voltage conditions. Keeping this gap in view, this paper provides a detailed analysis of power transfer through VFT operating under variable voltage conditions. The two asynchronous grids, one operating at a frequency of 60 Hz and the other one operating at 50 Hz, are connected to the stator and rotor of the VFT, respectively. The power flow is initially examined for constant voltage and variable torque conditions. The results demonstrate that the power flow between the two asynchronous grids varies linearly with the applied torque and reverses as the torque direction is reversed. The developed system was then modified to account for voltage variation. In order to analyse the impact of voltage variation on power flow through VFT, both the rotor and stator side of VFT are subjected to varying voltages. The results show that when the voltage on one side of the VFT is reduced, power flow towards that side increases while power flow towards the other side decreases. This indicates that the power flow through VFT can be effectively controlled by controlling both torque and the voltage on the rotor and stator side of VFT. Further, the simulation results achieved are validated through a real-time hardware in loop (HIL) implementation using Typhoon HIL emulator.

Mathematical description and optimization of automatic control systems using pulse width modulation of signals

2025-05-27

Volodymyr Myrhorod , I. Hvozdeva | System technologies

An approach is proposed for the adequate description of the processes of state change and optimization of complex discrete automatic control systems (ACS), in which the conver-sion of control signals … An approach is proposed for the adequate description of the processes of state change and optimization of complex discrete automatic control systems (ACS), in which the conver-sion of control signals into a sequence of pulses with time modulation is used. Requirements for actuators in many cases of practical use produce the need to use such a conversion to achieve proportional regulation of the output action in accordance with the input control sig-nal. The description of discrete automatic control systems of the specified type is generalized and an equivalent transformation of the discrete equations of their motion is proposed. The specified transformation allowed to take into account the change in the length of the control pulses for the linear continuous invariant part of the automatic control system. The proposed equivalent transformation of the equations of motion for discrete (im-pulse) systems with a constant sampling interval significantly simplifies their mathematical description and requires fewer resources for computational implementation. For automatic control systems with pulse-width modulation of the control signal, the algorithm for synthesis and obtaining the control signal has been improved, namely, the law of changing the polarity of the pulses and the form of the modulation characteristic based on the Lyapunov method. A distinctive feature of the proposed approach is the inclusion in the criteria of optimal-ity of energy costs for control in the form of a dependence on the duration of control pulses. Functional dependencies were obtained in a closed analytical form, which establish the form of the law of pulse polarity change and analytical description of the modulation characteristic of the pulse-width converter of the control signal according to the given criterion and pa-rameters of the invariable continuous part of the ACS. A computer experiment and simulation were performed when solving the test problem. The obtained results of solving the test problem confirm the effectiveness of the pro-posed approach. It was established that when using optimal nonlinear control laws, the qual-ity criterion is improved compared to the applied linear ones.

Perbaikan Kontrol Generasi Otomatis (AGC) dengan 2DOF-PID-PIID pada Dua Area Turbin Non Reheat dalam Sistem Tenaga yang Saling Terhubung

2025-05-25

Rio Irawan , Ermanu Azizul Hakim , Haneef Nouval Alannibras Humaidi | Jurnal Penelitian Pendidikan IPA

Sistem tenaga listrik yang efisien dan handal harus mampu menjaga kestabilan operasional, khususnya dalam menjaga kestabilan frekuensi agar tetap pada nilai nominalnya, baik dalam keadaan konstan maupun saat terjadi gangguan. … Sistem tenaga listrik yang efisien dan handal harus mampu menjaga kestabilan operasional, khususnya dalam menjaga kestabilan frekuensi agar tetap pada nilai nominalnya, baik dalam keadaan konstan maupun saat terjadi gangguan. Untuk itu, diperlukan pengendalian frekuensi yang optimal melalui Automatic Generation Control (AGC). Pada AGC, pengendali diperlukan untuk mempercepat respons frekuensi agar cepat stabil. Penelitian ini mengusulkan pengembangan pengendali 2DOF-PID menjadi 2DOF-PID-PIID yang dioptimasi menggunakan Dandelion Optimizer (DO) untuk meningkatkan kinerja AGC dalam konteks Load Frequency Control (LFC). Hasil pengujian menunjukkan bahwa algoritma DO memberikan hasil yang lebih baik dibandingkan dengan Sine Cosine Algorithm (SCA), Pelican Optimization Algorithm (POA), dan Archimedes Optimization Algorithm (AOA). Oleh karena itu, DO dipilih untuk mengoptimasi 2DOF-PID-PIID. Pengendali 2DOF-PID-PIID yang dioptimasi dengan DO menghasilkan nilai ITAE (Integral Time Absolute Error) sebesar 0.001276, yang lebih superior dibandingkan dengan pengendali 2DOF-PID (0.00158), 2DOF-PID-PID (0.00158), PID (0.001833), dan PIDD (0.002022), menunjukkan efektivitasnya dalam mempercepat respons dan menjaga kestabilan frekuensi pada sistem tenaga listrik.respons dan menjaga kestabilan frekuensi pada sistem tenaga listrik.

Study about Electrical Current Solutions Using the MATLAB Matrix Inverse Method and MATLAB Gauss-Jordan Method

2025-05-24

Abdur Rohman Wakhid | International Journal of Mechanical, Electrical and Civil Engineering

This study investigates the solutions of electrical current in linear circuit systems using two numerical methods implemented in MATLAB: the Matrix Inverse Method and the Gauss-Jordan Elimination Method. The objective … This study investigates the solutions of electrical current in linear circuit systems using two numerical methods implemented in MATLAB: the Matrix Inverse Method and the Gauss-Jordan Elimination Method. The objective is to analyze the effectiveness, accuracy, and computational efficiency of both techniques in solving systems of linear equations derived from Kirchhoff's laws. Several circuit models with varying levels of complexity are tested to compare results obtained from each method. The findings indicate that both methods yield consistent solutions, although differences in computational steps and processing time are observed. This research highlights the practicality of MATLAB as a powerful tool for electrical circuit analysis and provides insights into the selection of appropriate numerical methods for solving engineering problems.

Enhancing linear quadratic regulator and proportional-integral linear quadratic regulator controllers for photovoltaic systems

2025-05-23

Mohamed Assabaa , Adel Bouchahed , Abdellah Draidi +2 more

This article introduces the linear quadratic regulator (LQR) control and the hybrid linear quadratic regulator proportional-integral (LQR-PI) control, both applied to a photovoltaic system coupled with a DC-DC boost converter. … This article introduces the linear quadratic regulator (LQR) control and the hybrid linear quadratic regulator proportional-integral (LQR-PI) control, both applied to a photovoltaic system coupled with a DC-DC boost converter. The converter outputs direct current electrical energy to power direct loads. Two robust control correctors, based on the LQR and LQR-PI methods, are designed to enhance the static and dynamic performance of the PV DC-DC boost system. These controllers aim to minimize oscillations and overshoots while ensuring stability across varying solar conditions, thereby optimizing operation around the maximum power point. The disturb and observe maximum power point tracking (MPPT) technique, integrated with the LQR and LQR-PI controllers, ensures system functionality under disturbances. The novelty of this work lies in the development of a MATLAB control block diagram capable of regulating the reference voltage provided by the perturb and observe (P&amp;O) MPPT algorithm. MATLAB simulations demonstrate the robustness and high performance of the LQR and LQR-PI controllers, validating the efficacy of this boost converter control strategy.

Cascade control for feed drive systems

2025-05-23

Ngo Hong Nam , Tran Thuy Uyen Phuong , Vo Lam Chuong +1 more

In the machining industry, the demands for precision and high speed of machine tools in CNC machines are increasingly high. The crucial component of these kinds of machines is a … In the machining industry, the demands for precision and high speed of machine tools in CNC machines are increasingly high. The crucial component of these kinds of machines is a feed drive (FD) system, which comprises a servo motor coupled with a ball screw. Therefore, in this paper, a cascade scheme consisting of an inner and outer loop, which are also called the secondary and primary loops respectively, is suggested to control the feed drive system to improve the system's performance regarding tracking control and disturbance rejection. A filtered proportional integral (PI) controller is suggested for the secondary loop, and its tuning guidelines are established through the internal model control (IMC) approach. Additionally, a fractional-order proportional derivative (FOPD) controller and its design methodology in the frequency domain are introduced for the primary loop. The robust stability of the controlled system is assured by the maximum sensitivity function (Ms value). The investigation carried out through simulation focused on the feed drive system, and the findings indicated that the suggested control strategies fulfill the stringent criteria of a servo system.

Optimisation of Heating System Powered by Air Heat Pump and Gas Condensing Boiler Hybrid Unit

2025-05-20

Jānis Jākobsons , Jeļena Tihana

Gas condensing boiler and air to water heat pump hybrid unit is an optimal way to introduce renewable energy resources in existing buildings. Two energy sources (gas & electricity) give … Gas condensing boiler and air to water heat pump hybrid unit is an optimal way to introduce renewable energy resources in existing buildings. Two energy sources (gas & electricity) give hybrid unit higher flexibility in comparison to typical air to water heat pump. In hybrid solution air heat pump can be used in locations with low temperature heating seasons. Hybrid unit can output higher heat carrier temperatures, because of this, it can be used in combination with older radiator heating systems. There are many parameters that can influence the performance of hybrid heating unit. This paper investigates heat terminal type, heat carrier temperature, and outdoor switchover temperature setting (outdoor temperature at which hybrid unit switches from electricity to fossil fuel) influence on air to water heat pump and gas condensing boiler hybrid heating unit performance parameters (total efficiency - ηhybrid and primary energy factor - PEFhhp). Hybrid heating units performance is evaluated by using a computer model created in program IDA ice 4.8. The created computer model represents a real building, located in Latvia, that uses the previously mentioned hybrid heating unit. The model is verified by comparing its results with energy meter data from the real building, for time period from 01.03.2022 to 28.02.2023.The verified model is used to simulate how hybrid heating units performance is influenced by changes in heating terminal type, heat carrier temperature and outdoor switchover temperature setting. According to simulation data, at constant heat carrier temperature, heat terminal type has no influence on hybrid heating unit’s performance parameters. It has been found that increased heating system volume can reduce hybrid heating unit’s run time. In this case replacing panel radiators with floor heating, there is a 33% reduction in unit’s annual running time. In simulated scenarios, heat carrier temperature reduction by 15°C, increases ηhybrid by 8.7% and decreases PEFhhp by 17.5 % (at temperature graph 40/35°C). Switch over temperature increase from -7 to 3°C decreases ηhybrid by 47% and increases PEFhhp 7 %. Switch over temperature increase also reduces ηhybrid and PEFhhp change magnitude, when changing heat carrier temperature graphs. When changing the temperature graph from 40/35 to 55/50 °C the changes are as follows: at switchover temperature setting of -7°C, drops by 14,33 %, but PEFhhp increases by 23,42%; at switchover temperature setting of -2°C (actual setting), drops by 8,7 %, but PEFhhp increases by 17,51%; at switchover temperature setting of +3°C, drops by 1,74 %, but PEFhhp increases by 6,45%.

Development of a Universal Experimental Bench for Physical Modeling of Induction-resistive Heating Systems

2025-05-20

Maksim Fedin , Mariya Bulatenko , Aleksandra Vasilenko +3 more | Vestnik MEI

Determination of Transistor Losses in a Resonant Voltage Inverter

2025-05-20

Il’yas ABDULHAKOV , Е. В. Жданова , Artemiy BULOVICH +1 more

Non isolated DC-DC converter using switched capacitor fed synchronous reluctance motor for electric vehicle

2025-05-20

Praveenkumar Chandran , M. Ananya , S Dhanush +1 more

Design, modelling and analysis of LCL filter for three phase inverter

2025-05-20

Nalini Karchi , C. Bhagyashree

Comparative Analysis of Analog and FPGA Realizations Based on Matsuda Method for Fractional Order Integral Operator

2025-05-19

Ömer Pektaş , Murat Köseoğlu

Realization of fractional order (FO) transfer functions is essential for real-time applications such as communication systems, video, and digital signal processing. In general, in both implementation methods, the FO transfer … Realization of fractional order (FO) transfer functions is essential for real-time applications such as communication systems, video, and digital signal processing. In general, in both implementation methods, the FO transfer function including FO integral and derivative operators is transformed to an integer order approximate transfer function by one of the approximation methods such as Oustaloup, Matsuda, CFE, MSBL, etc. Then, the integer order approximate transfer function can be implemented using analog circuit elements such as opamps, resistors, capacitors, or digitally with field-programmable gate arrays (FPGA). In this study, integer order approximate continuous time transfer function obtained for FO integral operator by Matsuda’s approximation method is converted to a discrete time function, and that function is digitally implemented by FPGA with Xilinx System Generator. The results obtained are analyzed in comparison with analog circuit implementation results presented in a former study. The study emphasizes the growing importance of fractional calculus in providing accurate models for real-world systems and the challenges posed by the long memory effect in digital implementations. Simulation and experimental results, including sinusoidal waveform, step response and impulse response analysis, reveal the pros and cons of FPGA implementation. Considering these issues, conclusions are made on the effectiveness, efficiency and potential of the FPGA implementation for real-time applications in control systems and signal processing.

Innovative Control Techniques for Enhancing Signal Quality in Power Applications: Mitigating Electromagnetic Interference

2025-05-18

Nayan Kumar , Yousef Farhaoui , R. Vimala +3 more

Electromagnetic interference (EMI) remains a difficult task in the design and operation of contemporary power electronic systems, especially in those applications where signal quality has a direct impact on the … Electromagnetic interference (EMI) remains a difficult task in the design and operation of contemporary power electronic systems, especially in those applications where signal quality has a direct impact on the overall performance and efficiency. Conventional control schemes that have evolved to counteract the effects of EMI generally tend to have greater design complexity, greater error rates, poor control accuracy, and large amounts of harmonic distortion. In order to overcome these constraints, this paper introduces an intelligent and advanced control approach founded on the signal randomization principle. The suggested approach controls the switching activity of a DC–DC converter by dynamically tuned parameters like duty cycle, switching frequency, and signal modulation. A boost interleaved topology is utilized to maximize the current distribution and minimize ripple, and an innovative space vector-dithered sigma delta modulation (SV-DiSDM) scheme is proposed for cancelling harmonics via a digitalized control action. The used modulation scheme can effectively distribute the harmonic energy across a larger range of frequencies to largely eliminate EMI and boost the stability of the system. High-performance analysis is conducted by employing significant measures like total harmonic distortion (THD), switching frequency deviation, switching loss, and distortion product. Verification against conventional control models confirms the increased efficiency, less EMI, and greater signal integrity of the proposed method, and hence, it can be a viable alternative for EMI-aware power electronics applications.

Electromagnetic Induction Heating of Polymer Nanocomposites – A Computational Study on Design Parameters

2025-05-16

Taha Najam , Suhail Hyder Vattathurvalappil , Mahmoodul Haq +1 more

<title>Abstract</title> Electromagnetic induction technology enables rapid, non-contact heating of conductive polymer nanocomposites, yet uncontrolled localized heating during this process can induce significant thermomechanical damage. Key influencing factors include nanoparticle dispersion, … <title>Abstract</title> Electromagnetic induction technology enables rapid, non-contact heating of conductive polymer nanocomposites, yet uncontrolled localized heating during this process can induce significant thermomechanical damage. Key influencing factors include nanoparticle dispersion, agglomeration, magnetic field frequency, and coil geometry. This study presents a multiphysics computational model to simulate the induction heating of acrylonitrile butadiene styrene (ABS) reinforced with iron oxide (Fe₃O₄) nanoparticles, assessing the impact of these variables on heating efficiency. Numerical predictions were validated against experimental data at four Fe₃O₄ weight concentrations, demonstrating strong agreement and confirming a positive correlation between nanoparticle content and heating rate. Additionally, higher frequencies substantially enhanced heating, while nanoparticle agglomeration was found to promote localized overheating, posing a risk of material degradation. Although parameters such as particle size, coil design, and polymer positioning influenced heating rates, their effects were comparatively minor. The developed computational framework, experimentally validated, proves reliable and adaptable for modeling induction heating in diverse polymer nanocomposite systems.