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A low-cost approach to determine the optimum conductor plate thickness of linear permanent magnet eddy current brakes Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-03-12 Panpan Yang, Jianwei Li, Leian Zhang, Zonggao Mu, Zixuan Li, Jianhong Wang
This paper proposes a low-cost approach to determine the optimum Conductor Plate (CP) thickness without needs for mathematical models and large data volumes, which means that 0.6 times of the Standard Depth of Penetration (SDoP) can be directly selected as the optimum CP thickness without calculation. Firstly, the SDoP is introduced. Then, the influences of speed and conductivity on the optimum CP
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The effect of excitation current on radial electromagnetic force wave of tangential magnetizing parallel structure hybrid excitation synchronous motor Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-03-12 Wendong Zhang, Liang Pang, Huoda Hu, Haihong Qin, Chaohui Zhao
To study the influence of the magnitude of the excitation current on the radial electromagnetic force wave of the tangential magnetizing parallel structure hybrid excitation synchronous motor (TMPS-HESM) under different working conditions. Firstly, the basic structure of the motor and the rotor magnetic circuit model is introduced. Secondly, considering the influence of excitation current, the Maxwell
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Calculation of mutual inductance between arbitrarily positioned planar spiral coils for wireless power applications Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-03-12 Iftikhar Hussain, Dong-Kyun Woo
Mutual inductance is one of the main parameters required to determine the power link’s performance (output voltage, efficiency) in wireless power transfer. The coils are often misaligned angularly in these applications, which affects the mutual inductance and thus the performance. Hence, an accurate calculation of mutual inductance is necessary to decide the working region of the coil. This paper presents
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Analysis and reduction of electromagnetic vibration in integral-slot PM machine by functional magnet structure Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-03-12 Yunhao Wang, Zhiguang Liu, Zhiyong Yang
It is significant to balances torque and vibration performance for the surface-mounted permanent magnet (PM) machines. This paper proposes a functional magnet structure to suppress the vibration response of integral-slot surface-mounted PM machines. At the same time, the torque ripple is also greatly reduced without sacrificing the average torque. Firstly, taking the 48-slot/8-pole PM machine as an
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Research on the high temperature calibration of the electromagnetic damping generator applied to the rotary steerable system Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-03-12 Zequn Li, Desheng Li, Tong Zhao, Benzhen Guo
The Electromagnetic Damping Generator (EDG) used for petroleum exploration is faced with the problem of high local temperature during its downhole work. To avoid the damage to its internal circuit caused by high temperature, the key EDG circuit is required to be heat-resistant based on the electromagnetic induction principle and the current heating effect. First of all, the working condition with the
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Analysis method of permanent magnet eddy current brake under impact load Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-02-08 Yanping Shen, Ning Liu, Mingliang Sun, Biaobiao Wang, Yuxia Liang
Permanent magnet eddy current brake (PMECB) with high damping performance is widely used in engineering vibration suppression and braking. In this study, based on the braking dynamics of PMECB under impact load, the analysis method related to the damping characteristics are established, including astatic magnetic model with flux leakage, a uniform damping force model with demagnetization effect and
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Research on identification method of transformer winding material based on vibration characteristic Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-02-08 Xusheng Qian, Gaojun Xu, Xuancheng Zhang, Meng Miao, Yu Zhou
At present, there are shoddy transformers in the market, of which the windings are replaced by aluminum and copper clad aluminum. The commissioning of these transformers may cause poor power supply performance and excessive winding heating. The existing detection methods of windings are complex, time-consuming to operate and destructive. Therefore, a winding material identification method based on
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Research on transmission characteristics of sleeve type electromagnetic hybrid governor Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-02-08 Gang Cheng, Donghua Song
Aiming at the shortcomings of the traditional permanent magnet governor air gap speed regulation, a sleeve-type electromagnetic hybrid governor is proposed by controlling the current instead of adjusting the air gap, the structural characteristics and working principle of the speed regulation modelare introduced, and the electromagnetic torque mathematical expression is derived based on the equivalent
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Magnetic memory testing towards fatigue crack propagation of Q235 steel for remanufacturing Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-02-08 Jianhua Ye, Ze Guo, Shoujin Zeng, Mingsan Xu
A crack propagation trial was performed on a Q235 steel M(T) sample to investigate the modifications in magnetic memory signals throughout the crack propagation procedure of ferromagnetic substances. Various detection lines were employed to gather and scrutinize magnetic memory signals under two-stage fatigue loading. The interrelation between the gradient value Kmax, the peak-to-peak value SP−Py,
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Ultra-broadband transmission absorption of the all-dielectric water-based metamaterial Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-02-08 Zihan Chen, Zhaoyang Shen, Han Liu, Xiang Shu
In this paper, a structurally simple transmissive all-dielectric metamaterial absorber is designed, fabricated and measured. The unit cell consists of photosensitive resin and water, which the water layers composed of rectangle loop, rectangular block and traffic circle. It achieves over 90% absorption of electromagnetic waves in the frequency range between 11.0 and 27.3 GHz. Meanwhile, three absorption
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A new efficiency figure of merit for induction heating appliances operating under highly variable operating conditions Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-02-02 Oscar Lucia, Hector Sarnago, Pablo Guillen, Jose M. Burdío
Induction heating is an efficient and high-performance heating method which already has a significant market penetration and economic impact due to its benefits inherent to contactless energy transfer systems such as quickness, cleanness, and safety. Efficiency is a key design parameter since it determines not only the appliance performance but also its environmental impact, with significant socio-political
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Electro-thermal modeling of an induction heating process of 42CrMo4 steel probe Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-01-31 Amaiur Mendi-Altube, Irma Villar, Claudio Carretero, Jesús Acero
This paper describes the procedure of electromagnetic and thermal modeling of an induction hardening load of 42CrMo4 steel. In addition to the temperature and field level dependent physical properties of the material, the magnetic behavior of the load is captured by means of some kind of non-linearimpedance boundary condition which simplifies the computational cost of the simulation. The numerical
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Sensitivity analysis for the eddy current testing of carbon fiber reinforced plastic materials Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-01-23 Bálint Pintér, Arnold Bingler, Sándor Bilicz, József Pávó
In this work, a parametric study is carried out on carbon fiber-reinforced plastic (CFRP) materials to investigate how the spatially varying fiber distribution influences the measured signal in an eddy current testing (ECT) configuration. The measurement setup was modeled using finite element method, while the fiber distribution is taken into account by an inhomogeneous anisotropic conductivity tensor
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Imaging of subsurface defects with surface wave SAFT based on an array pickup EMAT Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-01-22 Jie Deng, Cuixiang Pei, Yuange Zhang, Yinqiang Qu, Ke Deng, Hong-En Chen, Zhenmao Chen
It is necessary to detect subsurface defects for a key metallic structural component especially a multilayer coating to ensure its structural integrity. In this paper, an imaging algorithm using the synthetic aperture focusing technique (SAFT) is developed for processing surface wave signals of array pickup electromagnetic acoustic transducer (EMAT) to improve its signal-to-noise ratio and detectability
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Research on electromagnetic field characteristics of rotating-magnet based mechanical antenna through the earth Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-01-17 Lipeng Wu, Wenwei Zhang, Xianjin Song, Guoqiang Liu, Jing Liu, Hui Xia, Liguo Fan
Conventional low-frequency electromagnetic wave (LFEM) transmitting antennas are enormous in size, which limits the application of LFEM in underground space. Rotating-magnet Based Mechanical Antennas can realize the miniaturization of low-frequency antennas, which is expected to bring new possibilities for underground electromagnetic detection or ground penetration communication. Firstly, this paper
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High resolution magnetic field imaging probe with two rows of TMR sensors for small defects inspection Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-01-12 Cai Long, Yuanyuan Wang, Haoran Dong, Yu Tao, Chaofeng Ye
It is still a challenging problem to detect small defects for eddy current array probes, which requires the probes to possess excellent sensitivity, as well as high spatial resolution. This paper presents a novel high-resolution magnetic field imaging probe with two rows of tunneling magnetoresistance (TMR) array sensors. The bare die sensors are integrated on a printed circuit board by golden wire
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Tomography of nonlinear materials via the monotonicity principle Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-01-12 Vincenzo Mottola, Antonio Corbo Esposito, Gianpaolo Piscitelli, Antonello Tamburrino
In this paper we present a first non-iterative imaging method for nonlinear materials, based on Monotonicity Principle. Specifically, we deal with the inverse obstacle problem, where the aim is to retrieve a nonlinear anomaly embedded in linear known background. The Monotonicity Principle (MP) is ageneral property for various class of PDEs, that has recently generalized to nonlinear elliptic PDEs.
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Imaging of conducting materials via the Kernel Method Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2024-01-10 Antonello Tamburrino, Vincenzo Mottola
In this work, we present a new non-iterative imaging method for Electrical Resistance Tomography (ERT). The problem in ERT is retrieving the spatial behaviour of the electrical conductivity by means of boundary measurements in steady-state conditions. Specifically, the interest is focused on the inverse obstacle problem, that consists in reconstructing the shape, position and dimension of one or more
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Detection mechanism of delamination in thermal barrier coatings of turbine blade using a Rayleigh wave EMAT Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-12-21 Yuange Zhang, Cuixiang Pei, Jie Deng, Tianhao Liu, Hong-En Chen, Zhenmao Chen
Nondestructive testing (NDT) for damage in thermal barrier coatings (TBCs) is significant for the safety guarantee of gas turbine blades. As a new NDT technology, electromagnetic acoustic transducer (EMAT) is widely applied for NDT of conductive structural components due to its advantages of coupling-free and high adaptability. In this paper, numerical simulations are conducted to study the wave propagation
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A hybrid spectral-spatial formulation for the calculation of the transient eddy-current response Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-12-20 Anastasios Skarlatos, Chritophe Reboud
A new approach for the solution of transient eddy-current problems involving pieces with one direction of symmetry is presented. The approach is applicable to pieces with translational or rotational symmetry. A Fourier series decomposition of the solution is introduced in the direction of symmetry,which converts the original 3D numerical problem into a series of independent 2D problems. The decomposition
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The application of artificial intelligence and machine learning in the design process for electromagnetic devices Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-12-14 David A. Lowther
Designing an electromagnetic device, as with many other devices, is an inverse problem. The issue is that the performance and some constraints on the inputs are provided but the solution to the design problem is non-unique. Additionally, conventionally, at the start of the design process, the information on potential solutions needs to be generated quickly so that a designer can make effective decisions
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Predicting of spatial electric field generated by substation switch operation based on AOS-GCN-LSTM Model Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-12-14 Jinpeng Shi, Donglai Wang, Yan Zhao, Chengze Li, Aijun Zhang
The radiation of adjacent field sources has a specific spatial correlation. In order to suppress electromagnetic disturbance and improve the electromagnetic compatibility of secondary equipment, the electric field’s spatial coupling characteristics and distribution law should be mastered. Therefore, a method for predicting the spatial electric field generated by substation switching operation based
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Analytical calculation of magnetic field in surface-mounted permanent-magnet vernier motors Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-12-05 Ningning Ren, Le Fan, Keke Yang
This paper proposes an analytical method to calculate the on-load magnetic field, Back electromotive force (BEMF) and torque of the surface-mounted permanent-magnet vernier machine (SMPMVM) accounting for slots, tooth-tips, flux modulation pole slots (FMPS) and the shape of magnet. The on-load magnetic field is predicted according to the surface-current method of permanent magnet, subdomain model and
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Eddy current testing in drill-bit tools Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-12-01 Athanasios Kyrgiazoglou, Stefanos Gerardis, Dionisis Loizos, Panagiotis-Avgerinos Politis, Theodoros Theodoulidis
Machining technology plays a major role in modern manufacturing industries due to the growing demand for equipment and products for aerospace, automotive, precision machinery sectors etc. A key issue associated with any type of machining operation is the accelerated tool wear which leads to shortertool life, thus to low machining precision and decreased productivity. In this paper an electromagnetic
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Detection and prediction of thimble tube defects using artificial neural networks Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-30 Tong Wu, Yuanyuan Wang, Xiaoguang Li, Yu Tao, Chaofeng Ye
The reliability of thimble tubes plays a critical role for maintaining the safety of a nuclear power plant. The defect depth needs to be quantified and predicted to support the operational decision-making. This paper presents a method to quantify the defects on thimble tube wall based on the analyzation of eddy current testing (ECT) data. Then, a method using artificial neural network (ANN) to predict
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Transient thermographic signal analysis for thinning detection in composite plate Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-30 Christophe Reboud, Audrey Vigneron, Anastassios Skarlatos
Infrared thermography is an imaging technique that can be used to inspect materials for flaws and various degradations in a non destructive way. In this work, we focused on the use of fast models to recover information about the material properties from experimental measurements recorded over time.Two different modelling approaches are compared to each other and to experimental data acquired on a composite
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Multi-mode wideband antenna based on multi-mode resonator Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-28 Rui Wu, Jianhong Lin, Shuting Cai
A multi-mode wideband antenna based on multi-mode resonator is proposed with stable radiation patterns, which is composed of metal radiators, parasitic resonators, shorted patches fed by the U-shaped feedline, and a box-shaped reflector. A prototype of the proposed antenna is designed, fabricated,and tested. Measured results show that the antenna achieves an impedance bandwidth of 37.5% (0.67–0.98
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Real-time identification of small anomalies from scattering matrix without background information Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-29 Won-Kwang Park
Several researches have confirmed the possibility of localizing small anomalies via Kirchhoff migration (KM); however, when the background information is unknown, small anomalies cannot be satisfactorily retrieved. This fact can be examined through the simulation results; however, related theoretical result to explain the reason of such phenomenon has not yet been investigated. In this contribution
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Coupled electric circuits method applied to pulsed eddy current NDT problem Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-29 Ferroudja Bouali, Hassane Mohellebi
The present work concerns the study of the effect of variation of the thickness of 2D cylindrical test-piece and lift-off (the air gap between the sensor and the test-piece) on the sensor response in case of transient source current. The coupled circuit’s method employed is based on the mutual’s inductances calculation and with the association to Kirchhoff laws it yields to a transient algebraic equations
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Effect of shielding of eddy current probes on the sensitivity for sweep frequency measurements Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-29 Arjun A.R., B. Sasi, Anish Kumar
Eddy current measurements are prone to edge effects when measurements are carried out near a sample boundary. In order to reduce these edge effects, typically ferrite shields are used which constrain the magnetic field within the shield volume. However, their effects on sensitivity towards changesin conductivity for Sweep Frequency Eddy Current (SFEC) measurements have not been investigated. A 2D axisymmetric
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Application of dimensional analysis to ECT in the era of NDE 4.0 Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-29 Antonello Tamburrino, Alessandro Sardellitti, Filippo Milano, Vincenzo Mottola, Marco Laracca, Luigi Ferrigno
This paper introduces Buckingham’s 𝜋 theorem in the context of Non-Destructive Testing & Evaluation (NDT&E). Its application leads to easier problems to handle by reducing the number of variables involved. In this sense, dimensional analysis can provide the foundation for in-line, real-time and low-cost inspection methods that are fully compatible with the requirements of the Industry 4.0 and NDE
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Single-structured zero-bias hybrid gas-magnetic bearing and its rotordynamic performance Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-28 Qing Liu, Ruihuan Ge, Li Wang, Tianming Ren, Ming Feng
A single-structured hybrid gas-magnetic bearing (HGMB) has been proposed for frequent start/stop occasions, which eliminates foil structures or static pressure systems by using the closed magnetic poles of the active magnetic bearing (AMB) as the bushing of the gas bearing. This allows the proposedbearing to realize the functions of both AMB and gas bearing with a single bearing structure. In this
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Skin sarcoma stage detection using antenna resonant scale Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-28 Dozohoua Silue, Mondher Labidi, Fethi Choubani
In this paper, a small antenna is proposed to diagnose skin sarcoma at an embryonic stage. The antenna has an area of 30.54 × 15.27 mm2 and resonates at 1429 MHz with a reflection coefficient of −17.64 dB. The structure consists of a 35 μm copper sheet etched on a 1.6 mm FR-4 substrate. The diagnosis is based on the resonance frequency shift, and the SAR (Specific Absorption Rate) variation when the
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Evaluation of the detectability of flaws in a two layer structure – A simulation-based PoD study incorporating correlated variables Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-23 Prashanth Baskaran, Helena Geirinhas Ramos, Artur Lopes Ribeiro
Probability of Detection (PoD) models, in general, take into consideration one or multiple flaw parameters such as its length, maximum depth, and/or maximum surface area, and one flaw signal. However, due to correlation between the response signals, it might be necessary to consider multiple flaw response signals simultaneously. Hence, in this work, we demonstrate the possibility of including multiple
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Development of a steel health monitoring device based on anisotropic magnetoresistance sensors Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-23 Georgia Stamou, Spyridon Angelopoulos, Evangelos Hristoforou
This paper presents a portable device based on an Anisotropic Magnetoresistance (AMR) sensor for Steel Health Monitoring. The system operates by detecting magnetic anomalies in ferromagnetic materials caused by strain, corrosion, etc. This sensor can have various applications in the transportation,building, and aerospace fields for safety and maintenance monitoring of ferromagnetic materials. In this
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Analysis on the low-frequency electromagnetic pulse coupling to horizontal electrically short lines Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-22 Shanyi Jiang, Xinliang Pang, Yunfen Chang, Jie Cui, Yubing Han
Abstract In this study, we investigated the coupling features of the nuclear electromagnetic pulse (NEMP) on overhead cables in the middle-and-far regions, different from the transmission line model commonly used for field-line coupling in high-frequency cases, using a simpler lumped approximation to solve the electrically small size model in low-frequency cases. To verify its effectiveness, a simulation
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Multi-objective cooperation optimization research on dynamic response and energy loss of high-speed solenoid valve for diesel engine injector Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-21 Zhiqing Yu, Jianhui Zhao, Rongqiang Wei
The dynamic response and operational reliability of high-speed solenoid valve (HSV) for diesel engine injector are the main indicators to measure their performance. At high-frequency, the eddy current energy and Joule energy generated by the HSV will be converted into heat, which has a significantimpact on the service life of HSV. The optimization of HSV involves the interaction between energy loss
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Neural metamodels and transfer learning for induction heating processes (TEAM 36 problem) Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-21 Paolo Di Barba, Fabrizio Dughiero, Michele Forzan, David A. Lowther, Antonio Marconi, Maria Evelina Mognaschi, Jan K. Sykulski
The authors explore the possibility of applying a convolutional Naeural Network (CNN) to the solution of coupled electromagnetic and thermal problem, focusing on the classical problem of induction heating systems, traditionally solved by resorting to Finite Element (FE) models. In fact, FE modelling is widely used in the design of induction heating systems due its accuracy, even if the solution of
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Linear antenna array modeling with deep neural networks Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-11-07 Paolo Di Barba, Łukasz Januszkiewicz
In modern wireless telecommunication systems, antenna arrays are widely used as elements of multiple – input multiple – output technology. In the fifth-generation systems, arrays are utilized to realize beamforming that forms the radiation pattern of the base station in the direction of the mobileuser. This requires the utilization of many-element antenna arrays that are precisely controlled to achieve
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Analytical calculation method of a liquid-cooling eddy current brake considering magnetic saturation and skin effect Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-10-20 Benzhen Guo, Desheng Li, Jinshan Tian, Lezhi Ye, Bin Wang, Zequn Li
In this article, a clear and concise analytical method for predicting the performance of a Liquid-cooling eddy current brake (LC-ECB) is proposed. The LC-ECB has a coolant channel in the rotor to allow direct cooling of the inner surface of the stator. The static air-gap magnetic field distributionis obtained by the dynamic magnetic equivalent circuit (MEC) method, and the magnetic flux leakage and
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Cylindrical cavity resonator for complex permittivity estimation at 1.2853 GHz: Coir and skins of rice, banana, lemon, watermelon, pineapple, and papaya Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-10-20 Jose L. Alvarez-Flores, Gustavo Vera-Reveles, Francisco R. Castillo Soria, L. Soriano-Equigua, F.M. Maciel Barboza, Pablo A. Alcaraz Valencia, Marco Cardenas-Juarez, E.S. Hernandez-Gomez, Jorge Simon
The knowledge of dielectric properties of organic materials at microwave frequencies is important for different applications in agriculture, food, or other similar research areas. The method of the low-cost disturbed cylindrical cavity resonator is a common measurement technique that considers resonant frequency shift when inserting samples of materials inside the cavity. Frequency shifts together
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An efficient multi-objective optimization strategy for Halbach array permanent magnet synchronous machines based on nonlinear semi-analytical model Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-09-25 Yunlu Du, Yunkai Huang, Baocheng Guo, Zichong Zhu, Fei Peng, Jianning Dong
In this article, an efficient multi-objective optimization strategy for the Halbach array permanent magnet synchronous machine (PMSM) is developed by taking into consideration the nonlinear B-H behavior of soft magnetic materials. Based on the harmonic modeling (HM) technology, the electromagneticperformances (EPs) of the Halbach array PMSM can be computed. To specifically model the local magnetic
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Optimization of coaxial magnetic gear and its application in wave power generation Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-09-25 Hongwei Fang, Ziyan Li
The application of coaxial magnetic gear (CMG) in wave generator instead of traditional variable speed gearbox can effectively improve torque density and reduce torque ripple. Thus, the operation principle of CMG from the perspective of magnetic field modulation is firstly analyzed in this paper. Then the air gap magnetic fields induced by high-speed and low-speed rotors are studied. And the radial
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Research on speed regulation method of high power magnetic gear Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-09-15 Xinmin Li, Feilong Li, Wing San Tony Hung, Zhengjie Qiu, Yonglong Wu, Runzhi Zhang
Magnetic gears have attracted the attention of many scholars due to their advantages of low noise, maintenance free, high torque density and inherent overload protection. In this paper, three speed regulation methods of high power magnetic gear transmission system are summarized and proposed, and the finite element analysis of the three speed regulation methods is carried out by COMSOL Multiphysics
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Non-cascaded finite time control of PMSLM based on super-twisting observer Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-09-15 Yuyi Pang, Haitao Yu, Yao Wang, Zhiyuan Che, Murad Ali, Zhicheng Ye
A novel control strategy based on finite time control and super-twisting observer is proposed to improve the control performance and robustness for permanent magnet synchronous linear motor (PMSLM) drive system. First of all, the velocity-current single loop control which called non-cascade structure control is proposed by the finite time control, then the response velocity of the PMSLM drive system
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Study on fluid friction loss on rotor surface of FeCo based high speed permanent magnet motor Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-08-25 Peng Hou, Baojun Ge, Dajun Tao, Bo Pan, Liping Zhao
The linear speed of the rotor surface of high speed permanent magnet motor (HSPMM) is as high as 100 m/s, and the air friction loss on the rotor surface is much higher than that of ordinary motors, accounting for a large proportion of the total loss, and the actual air friction loss on the rotor surface is much higher than that of ordinary motors. It is extremely difficult to directly measure and verify
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Multi-objective optimization of permanent magnet motors using deep learning and CMA-ES Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-08-25 Ryosuke Mikami, Hayaho Sato, Shogo Hayashi, Hajime Igarashi
This paper proposes a multi-objective optimization method for permanent magnet motors using a fast optimization algorithm, Covariance Matrix Adaptation Evolution Strategy (CMA-ES), and deep learning. Multi-objective optimization with topology optimization is effective in the design of permanent magnet motors. Although CMA-ES needs fewer population size than genetic algorithm for single objective problems
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Influence of loss function on training the LSTM network in wall moisture tomography Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-08-16 Tomasz Rymarczyk, Monika Kulisz, Grzegorz Kłosowski
This study concerns research on using electrical impedance tomography (EIT) to image moisture inside the porous walls of buildings. In order to transform the electrical measurements into the values of the reconstructed 3D images, a neural network containing the LSTM layer was used. The objective ofthe study was to evaluate the impact of various loss functions on the efficacy of a neural network’s learning
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Braking performance and temperature characteristics analysis of parallel multi-channel magnetorheological brake Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-08-01 Guoliang Hu, Xiao Yang, Lifan Wu, Wencai Zhu, Gang Li
In order to improve the braking performance of magnetorheological (MR) brake, a new MR brake with parallel multi-channel structure was developed in this paper. The three layers of axial damping gaps in the MR brake were utilized by using of the magnetic conductivity of the material, and the doubleexcitation coils was also adopted to effectively improve the braking performance. The braking torque and
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Exploiting TFET-based technology for energy-efficient STT-MRAM cells Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-06-30 Santiago S. Pérez, Alessandro Bedoya, Luis Miguel Prócel, Ramiro Taco
Spin-transfer torque magnetic random-access memory (STT-MRAM) has been demonstrated to be a leading candidate for on-chip memory technology. In this work, double-barrier magnetic tunnel junction (DMTJ) is exploited to define STT-MRAMs at the circuit-level (i.e. at the bitcell level). The DMTJ-basedbitcells are built from tunnel-FET technology and benchmarked against a calibrated 10 nm-FinFET technology
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Analysis of rotor fatigue characteristics of permanent magnet synchronous motor spindle in eccentric state Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-06-26 Haining Zhao, Shenbo Yu
In this paper, the distribution of the air gap magnetic field in the motorized spindle is obtained through theoretical derivation, which is verified by comparing with the finite element simulation results. Based on the original calculation of air gap magnetic field, the rotor eccentricity theory isadded, and the distribution of air gap magnetic field after rotor eccentricity is obtained. The correctness
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Multi physical comprehensive design of a new type of FeCo based high speed permanent magnet motor Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-06-23 Peng Hou, Baojun Ge, Dajun Tao, Bo Pan, Shuqi Liu
In order to solve the problem that the design of high-speed permanent magnet motor (HSPMM) is constrained by multi-physical fields, this paper starts with the comprehensive study of multi physical fields, introduces the finite element calculation model of rotor strength-rotor dynamics-electromagnetic field-fluid field and temperature field, carries out the comprehensive design of a 100 kW, 18 000 r/min
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The use of an LSTM-based autoencoder for measurement denoising in process tomography Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-06-23 Grzegorz Kłosowski, Tomasz Rymarczyk, Dariusz Wójcik
The main problem with any tomography is the transformation of measurements into images. It is the so-called “inverse problem,” which, due to its indeterminacy, can never be solved perfectly. An additional factor contributing to the deterioration of the quality of tomograms is measurement noise. This article shows how to denoise electrical capacitance tomography measurements using the LSTM autoencoder
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Convolutional neural networks applied to dissolved gas analysis for power transformers condition monitoring Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-06-16 Shaowei Rao, Shiyou Yang, Mauro Tucci, Sami Barmada
In this contribution a methodology to diagnose transformer faults based on Dissolved Gas Analysis (DGA) by using a convolutional neural network (CNN) is proposed. The algorithm to transform the gas contents (resulting from the DGA analysis) into feature maps is introduced, and the resulting featuremaps are the input of the CNN. In order to take into account the fact that the data set is imbalanced
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Modeling of the interaction between human body and electromagnetic waves near resonance using machine learning Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-06-21 Moez Hizem, Aymen Ben Saada, Sofiane Ben Mbarek, Fethi Choubani
Human-Like digital models have been around for quite some time. They significantly contributed to the increase of the accuracy of the whole-body-average specific absorption rate estimations. However, the anatomical and morphological diversity between human beings has not yet been embraced by the actual anthropomorphic models for several reasons such as financial costs, excessive exposure of volunteers
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Forecasting top oil temperature for UHV reactor using Seq2Seq model with convolutional block attention mechanism Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-06-21 Hao Jiang, Hongwei Zhang, Jing Chen, Sa Xiao, Xiren Miao, Weiqing Lin
The top oil temperature in ultra-high voltage (UHV) reactors has attracted enormous interest due to its wide applications in fault diagnosis and insulation evaluation. In this work, the precise prediction method based on the Seq2Seq module with the convolutional block attention mechanism is proposed for the UHV reactor. To reduce the influence of vibratility and improve computational efficiency, a
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Position control based on Gaussian function applied on magneto-rheological fluid disc brake of a hybrid mechanical device (MR brake - DC motor) Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-06-21 I. Rocha-Gómez, O. Susarrey-Huerta, A. Aguilar-Pérez, J.C. Suárez-Calderón, J.A. Flores-Campos, D. Desiderio-Maya, M. Cruz-Deviana, J. Cortés-Pérez, S.G. Torres-Cedillo, A. Reyes-Solís
This article presents an angular position control, based on the Gaussian function, of a Magneto-Rheological fluid disc brake (MR brake) driven by a DC motor. Our proposed control strategy is to apply a continuous magnetic flux density to the MR brake, which will be maximum when the proportional controller of the DC motor reaches the desired position to brake the hybrid device. The MR brake controller
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Study of electrical volume-conductivity, tensile strength, and electromagnetic shielding effectiveness of coconut fiber composite Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-06-21 Diah Permata, W. Widyawati, Herman H. Sinaga, Nining Purwasih, Sonny Widiarto
Natural fiber composite becomes a necessity encountering the issue of eco-friendly materials. The application of natural fiber composite as electromagnetic interference (EMI) shielding enclosures has not been studied extensively. This study aims to investigate the performance of the coconut fiber composite as EMI shielding enclosure material. Enhancement of the electrical volume-conductivity of the
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Both modified Darcy’s law and couple stresses effects on electro-osmotic flow of non-Newtonian nanofluid with peristalsis Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-06-14 Mohamed Abdelmoneim, Nabil Tawfik Eldabe, Mohamed Yahya Abouzeid, Mahmoud E. Ouaf
In this study, we focused on the heat transfer through a uniformly inclined rectangular duct caused by the electro-osmotic peristaltic flow of an unsteady non-Newtonian nanofluid. With couple stress, the fluid obeys the Papanastasiou model. The flow is through a porous medium that follows Darcy’s law in a modified form. In addition, Dufour and Soret effects, mixed convection, the impacts of a chemical
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Research on eddy current and force of non-ferrous metal in eddy current separator Int. J. Appl. Electromagn. Mech. (IF 0.6) Pub Date : 2023-06-14 Pin Lv, Mingjun Li, Xunwen Su, Lushuai Cheng, Haotian Ma, Ying Yang, Haoming Wang, Yuelin Zhai, Kaixuan Wang
For compensating the gap of present investigations, which did not consider the effect of skin depth before, a novel method is also proposed to obtain the eddy current force. At the beginning, the separating principle of eddy current separator (ECS) is given. Then, based on boundary conditions and the eddy current equations, the internal magnetic flux density, eddy current density and eddy current force