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Modelling permanent magnet excited uniform fields with rational approximations COMPEL (IF 0.7) Pub Date : 2024-04-18 Stefano Costa, Eugenio Costamagna, Paolo Di Barba
Purpose A novel method for modelling permanent magnets is investigated based on numerical approximations with rational functions. This study aims to introduce the AAA algorithm and other recently developed, cutting-edge mathematical tools, which provide outstandingly fast and accurate numerical computation of potentials and vector fields. Design/methodology/approach First, the AAA algorithm is briefly
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Modeling of novel cross-type hybrid 4-pole carrier system and experimental air gap control COMPEL (IF 0.7) Pub Date : 2024-04-16 Enes Mahmut Göker, Ahmet Fevzi Bozkurt, Kadir Erkan
Purpose The purpose of this paper is to introduce a novel cross (+) type yoke with hybrid electromagnets and new reluctance modeling to precisely calculate attraction force is given. Design/methodology/approach The comparison of attraction force and torque analyses between the proposed formulation and the existing formulation in the literature is comparatively presented. For the correctness of the
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An FEM framework for modeling forces between NdFeB magnets and HTS bulks COMPEL (IF 0.7) Pub Date : 2024-04-16 Guilherme Homrich, Aly Ferreira Flores Filho, Paulo Roberto Eckert, David George Dorrell
Purpose This paper aims to introduce an alternative for modeling levitation forces between NdFeB magnets and bulks of high-temperature superconductors (HTS). The presented approach should be evaluated through two different formulations and compared with experimental results. Design/methodology/approach The T-A and H-ϕ formulations are among the most efficient approaches for modeling superconducting
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MRI compatible electromagnetic actuator: magneto-thermal design and optimization COMPEL (IF 0.7) Pub Date : 2024-04-15 Boussad Moualek, Simon Chauviere, Lamia Belguerras, Smail Mezani, Thierry Lubin
Purpose The purpose of this study is to develop a magnetic resonance imaging (MRI)-safe iron-free electrical actuator for MR-guided surgical interventions. Design/methodology/approach The paper deals with the design of an MRI compatible electrical actuator. Three-dimensional electromagnetic and thermal analytical models have been developed to design the actuator. These models have been validated through
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An improved and simplified approach for the steady-state analysis of self-excited induction generators using binary search algorithm COMPEL (IF 0.7) Pub Date : 2024-04-08 Essaki Raj R., Sundaramoorthy Sridhar
Purpose This paper aims at developing an improved method, based on binary search algorithm (BSA) for the steady-state analysis of self-excited induction generators (SEIGs), which are increasingly used in wind energy electric conversion systems. The BSA is also compared with linear search algorithm (LSA) to bring out the merits of BSA over LSA. Design/methodology/approach All the parameters of SEIG
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Numerical modeling of magnetic cores with combined electrical steel grades COMPEL (IF 0.7) Pub Date : 2024-04-08 Oussama-Ali Dabaj, Ronan Corin, Jean-Philippe Lecointe, Cristian Demian, Jonathan Blaszkowski
Purpose This paper aims to investigate the impact of combining grain-oriented electrical steel (GOES) grades on specific iron losses and the flux density distribution within a single-phase magnetic core. Design/methodology/approach This paper presents the results of finite-element method (FEM) simulations investigating the impact of mixing two different GOES grades on losses of a single-phase magnetic
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A topology optimization of on-chip planar inductor based on evolutional on/off method and CMA-ES COMPEL (IF 0.7) Pub Date : 2024-04-02 Takahiro Sato, Kota Watanabe
Purpose There are few reports that evolutional topology optimization methods are applied to the conductor geometry design problems. This paper aims to propose an evolutional topology optimization method is applied to the conductor design problems of an on-chip inductor model. Design/methodology/approach This paper presents a topology optimization method for conductor shape designs. This method is based
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The influence of ITSF on vibration of high voltage Line-Start permanent magnet synchronous motor COMPEL (IF 0.7) Pub Date : 2024-04-02 Guanglu Yang, Si Chen, Jianwei Qiao, Yubao Liu, Fuwen Tian, Cunxiang Yang
Purpose The purpose of this paper is to present the influence of inter-turn short circuit faults (ITSF) on electromagnetic vibration in high-voltage line-starting permanent magnet synchronous motor (HVLSPMSMS). Design/methodology/approach In this paper, the ampere–conductor wave model of HVLSPMSM after ITSF is established. Second, a mathematical model of the magnetic field after ITSF is established
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A high-performance multilevel power supply for versatile induction heating processes COMPEL (IF 0.7) Pub Date : 2024-03-28 Ignacio Jesús Álvarez Gariburo, Hector Sarnago, Oscar Lucia
Purpose Induction heating processes need to adapt to complex geometries or variable processes that require a high degree of flexibility in the induction heating setup. This is usually done using complex inductors or adaptable resonant tanks, which leads to costly and constrained implementations. This paper aims to propose a multi-level, versatile power supply able to adapt the output to the required
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A new winding homogenization method based on thermal resistance concept COMPEL (IF 0.7) Pub Date : 2024-04-01 Ali Hashemi, Parsa Yazdanpanah Qaraei, Mostafa Shabanian-Poodeh
Purpose The aim of this paper is to provide a simple yet accurate and efficient geometric method for thermal homogenization of impregnated and non-impregnated coil winding technologies based on the concept of thermal resistance. Design/methodology/approach For regular windings, the periodic microscopic cell in the winding space is identified. Also, for irregular windings, the average microscopic cell
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Uniform diffracted fields of the extended theory of BDW from the circular aperture on a perfectly magnetic conductive surface COMPEL (IF 0.7) Pub Date : 2024-03-14 Mustafa Altınel, Uğur Yalçın
Purpose This paper aims to examine the uniform diffracted fields from a perfectly magnetic conductive (PMC) surface with the extended theory of boundary diffraction wave (BDW) approach. Design/methodology/approach Miyamoto and Wolf’s symbolic expression of the vector potential was used in the extended theory of BDW integral. This vector potential is applied to the problem, and the nonuniform field
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Full harmonic spectrum calculation of magnetic pressures in synchronous permanent magnet machines based on a new realistic partial analytical model: application to SVPWM and DPWM2 COMPEL (IF 0.7) Pub Date : 2024-03-12 Salma Benharref, Vincent Lanfranchi, Daniel Depernet, Tahar Hamiti, Sara Bazhar
Purpose The purpose of this paper is to propose a new method that allows to compare the magnetic pressures of different pulse width modulation (PWM) strategies in a fast and efficient way. Design/methodology/approach The voltage harmonics are determined using the double Fourier integral. As for current harmonics and waveforms, a new generic model based on the Park transformation and a dq model of the
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Comparison of simulations of the gas conduction in HVDC GIL by application of nonlinear conductivity model and ion-drift-diffusion model COMPEL (IF 0.7) Pub Date : 2024-03-11 Hendrik Hensel, Markus Clemens
Purpose Gas insulated systems, such as gas insulated lines (GIL), use insulating gas, mostly sulfur hexalfluoride (SF6), to enable a higher dielectric strength compared to e.g. air. However, under high voltage direct current conditions, charge accumulation and electric field stress may occur, which may lead to partial discharge or system failure. Therefore, numerical simulations are used to design
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Wind turbine emulator using three-phase IM controlled through an adaptive reactive power estimator fed by soft-VSI topology COMPEL (IF 0.7) Pub Date : 2024-03-06 Mouna Zerzeri, Intissar Moussa, Adel Khedher
Purpose The purpose of this paper aims to design a robust wind turbine emulator (WTE) based on a three-phase induction motor (3PIM). Design/methodology/approach The 3PIM is driven by a soft voltage source inverter (VSI) controlled by a specific space vector modulation. By adjusting the appropriate vector sequence selection, the desired VSI output voltage allows a real wind turbine speed emulation in
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A new approach for the flashover voltage prediction using an arc propagation reproduction on a high-voltage insulator COMPEL (IF 0.7) Pub Date : 2024-02-26 Dyhia Doufene, Samira Benharat, Abdelmoumen Essmine, Oussama Bouzegaou, Slimane Bouazabia
Purpose This paper aims to introduce a new numerical model that predicts the flashover voltage (FOV) value in the presence of polluted air surrounding a high-voltage insulator. The model focuses on simulating the propagation of arcs and aims to improve the accuracy and reliability of FOV predictions under these specific conditions. Design/methodology/approach This arc propagation method connecting
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Detection and localization of fault in DC microgrid using discrete Teager energy and generalized least square method COMPEL (IF 0.7) Pub Date : 2024-02-22 Subrat Kumar Barik, Smrutimayee Nanda, Padarbinda Samal, Rudranarayan Senapati
Purpose This paper aims to introduce a new fault protection scheme for microgrid DC networks with ring buses. Design/methodology/approach It is well recognized that the protection scheme in a DC ring bus microgrid becomes very complicated due to the bidirectional power flow. To provide reliable protection, the differential current signal is decomposed into several basic modes using adaptive variational
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Analysis of data-driven approaches for radar target classification COMPEL (IF 0.7) Pub Date : 2024-02-21 Aysu Coşkun, Sándor Bilicz
Purpose This study focuses on the classification of targets with varying shapes using radar cross section (RCS), which is influenced by the target’s shape. This study aims to develop a robust classification method by considering an incident angle with minor random fluctuations and using a physical optics simulation to generate data sets. Design/methodology/approach The approach involves several supervised
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Toward unique electrical ladder network model synthesis of a transformer winding high-frequency modeling using K-means and metaheuristic-based method COMPEL (IF 0.7) Pub Date : 2024-02-16 Abdallah Chanane, Hamza Houassine
Purpose Although, numerous optimization algorithms have been devoted to construct an electrical ladder network model (ELNM), they suffer from some frail points such as insufficient accuracy as well as the majority of them are unconstrained, which result in optimal solutions that violate certain security operational constraints. For this purpose, this paper aims to propose a flexible-constraint coyote
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Numerical modelling of heating and melting of metal in a mini industrial direct current electrical arc furnace COMPEL (IF 0.7) Pub Date : 2024-02-16 Sergejs Pavlovs, Andris Jakovičs, Alexander Chudnovsky
Purpose The purpose of this paper is the study of the electro-vortex flow (EVF) as well as heating and melting processes for mini industrial direct current electric arc furnace (DC EAF). Design/methodology/approach A mini DC EAF was designed, manufactured and installed to study the industrial processes of heating and melting a small amount of melt, being 4.6 kg of steel in the case under study. Numerical
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Design and analysis of electric spring based on battery-less current-source inverter COMPEL (IF 0.7) Pub Date : 2024-02-15 Yumin He, Tingyun Gu, Bowen Li, Yu Wang, Dongyuan Qiu, Yang Zhang, Peicheng Qiu
Purpose Electric spring (ES) is a demand response method that can stabilize the voltage of critical loads and improve power quality, especially in a weak power grid with a high proportion of renewable energy sources. Most of existing ESs are implemented by voltage-source inverter (VSI), which has some shortcomings. For example, the DC-link capacitor limits the service life of ES, and the battery is
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Model of an E-cored probe over layered conductor containing corrosion for eddy current testing COMPEL (IF 0.7) Pub Date : 2024-02-12 Siquan Zhang
Purpose In eddy current nondestructive testing, ferrite-cored probes are usually used to detect and locate defects such as cracks and corrosion in conductive materials. However, the generic analytical model for evaluating corrosion in layered conductor using ferrite-cored probe has not yet been developed. The purpose of this paper is to propose and verify the analytical model of an E-cored probe for
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Optimizing IRE targeting using multi-electrode structure and biomedical multi-output generator COMPEL (IF 0.7) Pub Date : 2024-02-07 Borja López-Alonso, Pablo Briz, Hector Sarnago, José M. Burdio, Oscar Lucia
Purpose This paper aims to study the feasibility of proposed method to focus the electroporation ablation by mean of multi-output multi-electrode system. Design/methodology/approach The proposed method has been developed based on a previously designed electroporation system, which has the capabilities to modify the electric field distribution in real time, and to estimate the impedance distribution
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Nonlinear optimal control for the five-phase induction motor-based traction system of electric vehicles COMPEL (IF 0.7) Pub Date : 2024-02-01 Gerasimos G. Rigatos, Pierluigi Siano, Mohammed S. Al-Numay, Bilal Sari, Masoud Abbaszadeh
Purpose The purpose of this article is to treat the nonlinear optimal control problem in EV traction systems which are based on 5-phase induction motors. Five-phase permanent magnet synchronous motors and five-phase asynchronous induction motors (IMs) are among the types of multiphase motors one can consider for the traction system of electric vehicles (EVs). By distributing the required power in a
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An optoelectronic Coupler based on graphene patterns and SU-8 photoresist COMPEL (IF 0.7) Pub Date : 2024-01-31 Elham Zandi, Majid Fouladian, Jalil Mazloum
Purpose The purpose of this research is to efficiently separate incident terahertz (THz) waves into distinct transmission and reflection channels by minimizing the absorption ratio. So, the optical systems operating within the THz frequency range can developed. To achieve a multi-band response, four different periodic arrays of graphene patterns are used. These arrays are strategically stacked on both
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Semianalytical modeling of squirrel-cage induction machines with consideration of iron permeability and eddy-currents using elementary subdomain technique COMPEL (IF 0.7) Pub Date : 2024-01-23 Lazhar Roubache, Kamel Boughrara, Frédéric Dubas, Brahim Ladghem Chikouche, Rachid Ibtiouen
Purpose This paper aims to propose a semianalytical model of a squirrel-cage induction machine (SCIM), considering local magnetic saturation and eddy-currents induced in the rotor bars. Design/methodology/approach The regions of the rotor and stator are divided into elementary subdomains (E-SDs) characterized by general solutions at the first harmonic of the magneto-harmonic Maxwell’s equations. These
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Fractal model of thermal contact conductance of the involute arc cylindrical gear considering friction coefficient COMPEL (IF 0.7) Pub Date : 2024-01-19 Xianguang Sun, Xicheng Xin
Purpose The purpose of this study is to propose a fractal model of thermal contact conductance (TCC) of the involute arc cylindrical gear considering friction coefficient. Design/methodology/approach The influences of fractal dimension, fractal roughness and surface modification coefficient on the TCC of the rough surface were studied. Findings The results indicate that increasing the fractal dimension
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Loss minimization based optimal frequency selection for low frequency transmission lines using telegrapher’s method COMPEL (IF 0.7) Pub Date : 2023-12-26 Mukul Anand, Debashis Chatterjee, Swapan Kumar Goswami
Purpose The purpose of this study is to obtain the optimal frequency for low-frequency transmission lines while minimizing losses and maintaining the voltage stability of low-frequency systems. This study also emphasizes a reduction in calculations based on mathematical approaches. Design/methodology/approach Telegrapher’s method has been used to reduce large calculations in low-frequency high-voltage
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Modeling and simulation analysis of current transformer based on magnetizing current as the solution variable COMPEL (IF 0.7) Pub Date : 2023-12-21 Hongsen You, Mengying Gan, Dapeng Duan, Cheng Zhao, Yuan Chi, Shuai Gao, Jiansheng Yuan
Purpose This paper aims to develop a model that reflects the current transformer (CT) core materials nonlinearity. The model enables simulation and analysis of the CT excitation current that includes the inductive magnetizing current and the resistive excitation current. Design/methodology/approach A nonlinear CT model is established with the magnetizing current as the solution variable. This model
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Parameters calculation method of energetic model for symmetrical static hysteresis loop and asymmetrical minor loop COMPEL (IF 0.7) Pub Date : 2023-12-14 Junan Ji, Zhigang Zhao, Shi Zhang, Tianyuan Chen
Purpose This paper aims to propose an energetic model parameter calculation method for predicting the materials’ symmetrical static hysteresis loop and asymmetrical minor loop to improve the accuracy of electromagnetic analysis of equipment. Design/methodology/approach For predicting the symmetrical static hysteresis loop, this paper deduces the functional relationship between magnetic flux density
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Fractal model of thermal contact conductance of rough surfaces based on axisymmetric cosinusoidal asperity COMPEL (IF 0.7) Pub Date : 2023-12-14 Xianguang Sun, Xicheng Xin
Purpose The purpose of this study is to propose a fractal model of thermal contact conductance of rough surfaces based on axisymmetric cosinusoidal asperity. Design/methodology/approach The effects of contact load, fractal dimension, fractal roughness and friction coefficient on the thermal contact conductance of rough surfaces were investigated in this study. Findings The findings suggest that as
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Cylindrical electromagnets: modeling, analysis, simulation and implementation COMPEL (IF 0.7) Pub Date : 2023-12-14 Ali Hashemi, Parsa Yazdanpanah Qaraei
Purpose This paper aims to present an accurate magnetic equivalent circuit for modeling the cylindrical electromagnet so that by analyzing it, the magnetic flux density in different parts of the electromagnet, as well as its lifting force, can be calculated. Design/methodology/approach The structure of the electromagnet is divided into parts that can be modeled by lumped element parameters. Mathematical
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Limitations of Jiles–Atherton models to study the effect of hysteresis in electrical steels under different excitation regimes COMPEL (IF 0.7) Pub Date : 2023-12-05 Abdelazeem Hassan Shehata Atyia, Abdelrahman Mohamed Ghanim
Purpose The accurate modeling of magnetic hysteresis in electrical steels is important in several electrical and electronic applications. Numerical models have long been known that can correctly reproduce some typical behaviours of these magnetic materials. Among these, the model proposed by Jiles and Atherton must certainly be mentioned. This model is intuitive and fairly easy to implement and identify
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A machine learning-driven support vector regression model for enhanced generation system reliability prediction COMPEL (IF 0.7) Pub Date : 2023-11-29 Pouya Bolourchi, Mohammadreza Gholami
Purpose The purpose of this paper is to achieve high accuracy in forecasting generation reliability by accurately evaluating the reliability of power systems. This study uses the RTS-79 reliability test system to measure the method’s effectiveness, using mean absolute percentage error as the performance metrics. Accurate reliability predictions can inform critical decisions related to system design
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Sensorless robust control for PMSG wind energy conversion systems based on smith predictor ADRC and SMO-PLL estimation COMPEL (IF 0.7) Pub Date : 2023-11-16 Abdeldjabar Benrabah, Farid Khoucha, Ali Raza, Mohamed Benbouzid
Purpose The purpose of this study is to improve the control performance of wind energy conversion systems (WECSs) by proposing a new sensorless, robust control strategy based on a Smith predictor active disturbance rejection control (SP-ADRC) associated with a speed/position estimator. Design/methodology/approach The estimator consists of a sliding mode observer (SMO) in combination with a phase-locked
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Refining the physical description of charge trapping and detrapping in a transport model for dielectrics using an optimization algorithm COMPEL (IF 0.7) Pub Date : 2023-11-14 Khaled Hallak, Fulbert Baudoin, Virginie Griseri, Florian Bugarin, Stephane Segonds, Severine Le Roy, Gilbert Teyssedre
Purpose The purpose of this paper is to optimize and improve a bipolar charge transport (BCT) model used to simulate charge dynamics in insulating polymer materials, specifically low-density polyethylene (LDPE). Design/methodology/approach An optimization algorithm is applied to optimize the BCT model by comparing the model outputs with experimental data obtained using two kinds of measurements: space
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Asymmetric air gap fault detection in linear permanent magnet Vernier machines COMPEL (IF 0.7) Pub Date : 2023-11-09 Mohammadhossein Arianborna, Jawad Faiz, Mehrage Ghods, Amirhossein Erfani-Nik
Purpose The aim of this paper is to introduce an accurate asymmetric fault index for the diagnosis of the faulty linear permanent magnet Vernier machine (LPMVM). Design/methodology/approach Three-dimensional finite element method is applied to model the LPMVM. The geometrical and physical properties of the machine, the effect of stator and translator teeth, magnetic saturation of core and nonuniform
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Development and comparison of double-stator memory machines with parallel hybrid magnets COMPEL (IF 0.7) Pub Date : 2023-11-03 Cheng Peng, He Cheng, Tong Zhang, Jing Wu, Fandi Lin, Jinglong Chu
Purpose This paper aims to further develop stator permanent magnet (PM) type memory machines by providing generalized design guidelines for double-stator memory machines (DSMMs) with hybrid PMs. This paper discusses the design experience of DSMMs and presents a comparative study of radial magnetization (RM) and circumferential magnetization (CM) types. Design/methodology/approach It begins with an
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Micromagnetics and multiscale hysteresis simulations of permanent magnets COMPEL (IF 0.7) Pub Date : 2023-11-02 Yangyiwei Yang, Patrick Kühn, Mozhdeh Fathidoost, Bai-Xiang Xu
Purpose Confronting the unveiled sophisticated structural and physical characteristics of permanent magnets, notably the samarium–cobalt (Sm-Co) alloy, This work aims to introduce a simulation scheme that can link physics-based micromagnetics on the nanostructures and magnetostatic homogenization on the mesoscale polycrystalline structures. Design/methodology/approach The simulation scheme is arranged
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Optimization design of insulation structure of multiwinding high-frequency transformer based on response surface method COMPEL (IF 0.7) Pub Date : 2023-10-23 Bin Chen, Hongxia Cao, Nina Wan
Purpose The purpose of this paper is to study the insulation structure optimization method of multiwinding high-frequency transformer (HFT). Design/methodology/approach This paper takes 100 kW, 10 kHz multiwinding HFT as the research object. First, the distribution of electric field strength within the core window of multiwinding HFT with different winding configurations is simulated by the electrostatic
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Crowding-based multi-objective artificial gorilla troops optimizer for brushless direct current motor design optimization COMPEL (IF 0.7) Pub Date : 2023-10-19 Hadjaissa Bensoltane, Zoubida Belli
Purpose This paper aims to present a novel multi-objective version of the Gorilla Troops optimizer (GTO), based on crowding distance, to achieve the optimal design of a brushless direct current motor. Design/methodology/approach In the proposed algorithm, the crowding distance technique was integrated into the GTO to perform the leader selection and also for the external archive refinement from extra
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GPU-accelerated body-internal electric field exposure simulation using low-frequency magnetic field sampling points COMPEL (IF 0.7) Pub Date : 2023-10-03 Norman Haussmann, Steven Stroka, Benedikt Schmuelling, Markus Clemens
Purpose High resolution simulations of body-internal electric field strengths induced by magneto-quasistatic fields from wireless power transfer systems are computationally expensive. The exposure simulation can be split into two separate simulation steps allowing the calculation of the magnetic flux density distribution, which serves as input into the second simulation step to calculate the body-internal
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Feasibility study of eigenmode propagation through 2D models of vegetation COMPEL (IF 0.7) Pub Date : 2023-09-29 Oliver Csernyava, Jozsef Pavo, Zsolt Badics
Purpose This study aims to model and investigate low-loss wave-propagation modes across random media. The objective is to achieve better channel properties for applying radio links through random vegetation (e.g. forest) using a beamforming approach. Thus, obtaining the link between the statistical parameters of the media and the channel properties. Design/methodology/approach A beamforming approach
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Pyrit: A finite element based field simulation software written in Python COMPEL (IF 0.7) Pub Date : 2023-09-28 Jonas Bundschuh, M. Greta Ruppert, Yvonne Späeck-Leigsnering
Purpose The purpose of this paper is to present the freely available finite element simulation software Pyrit. Design/methodology/approach In a first step, the design principles and the objective of the software project are defined. Then, the software’s structure is established: The software is organized in packages for which an overview is given. The structure is based on the typical steps of a simulation
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Modelling stranded wires using homogenization and the Cauer ladder method COMPEL (IF 0.7) Pub Date : 2023-09-28 Niels Koester, Franz Pichler, Oszkar Biro
Purpose The purpose of this paper is to introduce a new method to model a stranded wire efficiently in 3D finite element simulations. Design/methodology/approach In this method, the stranded wires are numerically approximated with the Cauer ladder network (CLN) model order reduction method in 2D. This approximates the eddy current effect such as the skin and proximity effect for the whole wire. This
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Comparison of damping techniques in non-linear spring-mass systems for power transformers under short-circuit condition COMPEL (IF 0.7) Pub Date : 2023-09-27 Gergely Koczka, Gerald Leber
Purpose The simplified modeling of many physical processes results in a second-order ordinary differential equation (ODE) system. Often the damping of these resonating systems cannot be defined in the same simplified way as the other parameters due to the complexity of the physical effects. The purpose of this paper is to develop a mathematically stable approach for damping resonances in nonlinear
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Design and performance analysis of cascaded pseudo derivative feedback plus pseudo derivative feedforward controller for PMSM drive COMPEL (IF 0.7) Pub Date : 2023-09-15 Prabhakaran Koothu Kesavan, Umashankar Subramaniam, Dhafer Jaber Almakhles
Purpose This paper aims to present a cascaded pseudo derivative feedback (PDF) plus pseudo derivative feedback plus pseudo derivative feedforward (PDFF) controller for a permanent magnet synchronous motor (PMSM) to improve the transient response of the system. Design/methodology/approach Proportional integral (PI) plus PI controller and the proposed PDF plus PDFF controller are designed, stability
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Numerical analysis of neutral delay differential equations with high-frequency inputs COMPEL (IF 0.7) Pub Date : 2023-09-15 Marissa Condon
Purpose The paper proposes an efficient and insightful approach for solving neutral delay differential equations (NDDE) with high-frequency inputs. This paper aims to overcome the need to use a very small time step when high frequencies are present. High-frequency signals abound in communication circuits when modulated signals are involved. Design/methodology/approach The method involves an asymptotic
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Eddy current losses in power voltage transformer open-type cores COMPEL (IF 0.7) Pub Date : 2023-09-13 Stjepan Frljić, Bojan Trkulja, Ana Drandić
Purpose The purpose of this paper is to present a methodology for calculating eddy current losses in the core of a single-phase power voltage transformer, which, unlike a standard power transformer, has an open-type core (I-type core). In those apparatus, reduction of core losses is achieved by using a multipart open-type core that is created by merging a larger number of leaner cores. Design/methodology/approach
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New identification of induction machine parameters with a meta-heuristic algorithm based on least squares method COMPEL (IF 0.7) Pub Date : 2023-09-12 Anwar Zorig, Ahmed Belkheiri, Bachir Bendjedia, Katia Kouzi, Mohammed Belkheiri
Purpose The great value of offline identification of machine parameters is when the machine manufacturer does not provide its parameters. Most machine control strategies require parameter values, and some circumstances in the industrial sector only require offline identification. This paper aims to present a new offline method for estimating induction motor parameters based on least squares and a salp
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Electric field and SAR distribution in the vicinity of dental implants exposed to the cell phone electromagnetic radiation COMPEL (IF 0.7) Pub Date : 2023-09-11 Dejan B. Jovanovic, Dragan Krasic, Nenad N. Cvetkovic, Dragan Vuckovic, Vladimir B. Stanković
Purpose The purpose of this paper is to determine the electric field and specific absorption rate (SAR) distribution within biological tissues in the vicinity of dental implants, exposed to the mobile phone radiation. Design/methodology/approach This research was performed for the frequency of 2.6 GHz, which corresponds to 4G mobile network. The adequate 3D realistic numerical models of the mobile
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Extended electrical equivalent circuit for modelling compound DC motors COMPEL (IF 0.7) Pub Date : 2023-09-07 Esra Kandemir Beser
Purpose The purpose of this study is to create an extended equivalent circuit model for a compound DC motor, consisting completely of electrical parameters and quantities. Design/methodology/approach The dynamic model of the compound DC motor is obtained by establishing the voltage equations for the armature and excitation circuit and the mechanical equation for the mechanical part. The mechanical
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Toward a simple topological model of a three-phase transformer including deep saturation conditions COMPEL (IF 0.7) Pub Date : 2023-09-07 Sergey E. Zirka, Dennis Albert, Yuriy I. Moroz, Lukas Daniel Domenig, Robert Schürhuber
Purpose This paper aims to propose a method of parametrizing topological transformer model at high flux densities in the core. Design/methodology/approach The approach proposed is based on terminal voltages and currents measured in a special purpose saturation test whose data are combined with typical saturation curves of grain-oriented electrical steels; the modeling is carried out in the ATPDraw
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On the field uniformity of reverberation chambers – a global sensitivity analysis study COMPEL (IF 0.7) Pub Date : 2023-08-28 Anett Kenderes, Szabolcs Gyimóthy, Péter Tamás Benkő
Purpose Global sensitivity analysis (SA) by means of Sobol’ indices enhanced with different surrogate modeling techniques is performed in this work. The purpose is to investigate the influence of measurement uncertainties and the environment characteristics themselves on the desired field uniformity in reverberation chambers (RCs). This yields an efficient apparatus for the stirring and chamber design
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The system for distributed energy resources testing according to the IEEE 1547-2018 standard COMPEL (IF 0.7) Pub Date : 2023-08-24 Marko A. Dimitrijević, Milutin Petronijević
Purpose This paper aims to propose a new approach to testing distributed energy resources (DERs) in compliance with the IEEE 1547-2018 standard and describes a new, integrated testing and validation system. Design/methodology/approach The system is built on the virtual instrumentation paradigm, using acquisition modules to measure physical quantities, while signal processing, including intensive calculations
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Thermal analysis for foreign objects in high-power wireless power transfer systems COMPEL (IF 0.7) Pub Date : 2023-08-11 Myrel Tiemann, Markus Clemens, Benedikt Schmuelling
Purpose This paper aims to present a fast and modular framework implementation for the thermal analyses of foreign metal objects in the context of wireless power transfer (WPT) to evaluate whether they pose a hazard to the system. This framework serves as a decision-making tool for determining the necessity of foreign object detection in certain applications and at certain transmitted power levels
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Topology optimization and parameter optimization hybridized by mesh smoothing for IPMSM design COMPEL (IF 0.7) Pub Date : 2023-08-11 Zhen Sun, Takahiro Sato, Kota Watanabe
Purpose Topology optimization (TO) methods have shown their unique advantage in the innovative design of electric machines. However, when introducing the TO method to the rotor design of interior permanent magnet (PM) synchronous machines (IPMSMs), the layout parameters of the magnet cannot be synchronously optimized with the topology of the air barrier; the full design potential, thus, cannot be unlocked
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Evaluating magnetic fields using deep learning COMPEL (IF 0.7) Pub Date : 2023-08-11 Mohammad Mushfiqur Rahman, Arbaaz Khan, David Lowther, Dennis Giannacopoulos
Purpose The purpose of this paper is to develop surrogate models, using deep learning (DL), that can facilitate the application of EM analysis software. In the current status quo, electrical systems can be found in an ever-increasing range of products that are part of everyone’s daily live. With the advances in technology, industries such as the automotive, communications and medical devices have been
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A plasma energy deposition based model for power cable bellows discharge COMPEL (IF 0.7) Pub Date : 2023-07-31 Chong Xu, Pengbo Wang, Fan Yang, Shaohua Wang, Junping Cao, Xin Wang
Purpose This paper aims at building a discharge model for the power cable bellows based on plasma energy deposition and analyzing the discharge ablation problem. Design/methodology/approach Aiming at the multiphysical mechanism of the discharge ablation process, a multiphysical field model based on plasma energy deposition is established to analyze the discharge characteristics of the power cable bellows
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Fast numerical techniques for FE simulations in electrical capacitance tomography COMPEL (IF 0.7) Pub Date : 2023-07-21 M. Neumayer, T. Suppan, T. Bretterklieber, H. Wegleiter, Colin Fox
Purpose Nonlinear solution approaches for inverse problems require fast simulation techniques for the underlying sensing problem. In this work, the authors investigate finite element (FE) based sensor simulations for the inverse problem of electrical capacitance tomography. Two known computational bottlenecks are the assembly of the FE equation system as well as the computation of the Jacobian. Here
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Improving the accuracy for amplitude and frequency of analytical equation of single-ended ring oscillators based on circuit and transistor parameters COMPEL (IF 0.7) Pub Date : 2023-07-12 Mehrdad Moradnezhad, Hossein Miar Naimi
Purpose This paper aims to find a closed-form expression for the frequency and amplitude of single-ended ring oscillators when transistors experience all regions. Design/methodology/approach In this paper, the analytical relationships presented for ring oscillator amplitude and frequency are approximately derived due to the nonlinear nature of this oscillator, taking into account the differential equation