IEEE Journal on Multiscale and Multiphysics Computational Techniques最新文献_第7页

Rapid Flux Concentration Factor Determination for Halbach Array Based PM Rotors Using Composite FE Based Method 基于复合有限元法的Halbach阵列永磁转子通量浓度因子快速测定

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-07-06 DOI: 10.1109/JMMCT.2023.3292979

Sharankumar Shastri;Bhim Singh

{"title":"Rapid Flux Concentration Factor Determination for Halbach Array Based PM Rotors Using Composite FE Based Method","authors":"Sharankumar Shastri;Bhim Singh","doi":"10.1109/JMMCT.2023.3292979","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3292979","url":null,"abstract":"Conventional empirical-formulae (CEF) based permanent magnet (PM) motor design employs the use of several assumptions in the form of magnetic material non-linearity, air-gap and magnet reluctances derived from assumed leakage factors leading to the incorrect estimation of air-gap flux densities. This problem is much more prevalent in various forms of hybrid PM magnetization topologies such as Halbach array based PM (HAPM) or Halbach array based consequent pole based PM (HACPPM) rotors. In order to improve the air-gap magnetic flux density estimation using the CEF design method, a flux density adjustment factor is proposed in this work, which utilizes a look-up table formed upon a reduced electromagnetic finite-element simulation search space to improve the accuracy of flux density estimation in both Halbach and Consequent-Halbach PM rotors using the flux concentration factor (FCF). First, the derivation of the FCF is introduced. Then the effectiveness of the FCF + CEF method is analyzed quantitatively, in comparison with conventional CEF and 2D-FE (electromagnetic) methods and performance is analyzed.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"241-251"},"PeriodicalIF":2.3,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49981547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiscale EMC Modeling, Simulation, and Validation of a Synchronous Step-Down DC-DC Converter 同步降压DC-DC变换器的多尺度电磁兼容建模、仿真和验证

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-06-05 DOI: 10.1109/JMMCT.2023.3276358

Rajen Murugan;Jie Chen;Ambreesh Tripathi;Bibhu Prasad Nayak;Harikiran Muniganti;Dipanjan Gope

{"title":"Multiscale EMC Modeling, Simulation, and Validation of a Synchronous Step-Down DC-DC Converter","authors":"Rajen Murugan;Jie Chen;Ambreesh Tripathi;Bibhu Prasad Nayak;Harikiran Muniganti;Dipanjan Gope","doi":"10.1109/JMMCT.2023.3276358","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3276358","url":null,"abstract":"The proliferation of power electronics in automotive and industrial applications raises compliance challenges in meeting electromagnetic compatibility (EMC) regulatory standards. In this work, we develop a robust multiscale system-level modeling and simulation methodology for predicting CISPR 25 conducted emission (CE) and radiated emission (RE). The method is based on a novel two-stage process. In the first stage, the IC model is generated either by non-linear time-domain simulation using a device-level physics model or oscilloscope measurements if a prototype is available. In the second stage, the IC model waveforms are used in a simulation environment comprising 3D full-wave frequency domain analysis and specially prepared macro-models for the laboratory equipment. Silicon validation of CISPR 25 EMC measurements on a “low-EMI,” high-performance DCDC automotive/industrial synchronous step-down converter is presented to validate the integrity of the predictive modeling methodology. Good correlations between modeling and EMC-certified testing laboratory emission measurements are achieved (i.e., within +/- 3 dBuV for CE and +/- 6 dBuV for RE). As a result, the predictive EMC modeling methodology can be implemented, early in the design cycle, to ensure first-pass EMC-compliant design.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"269-280"},"PeriodicalIF":2.3,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49962913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Mixed-Potential Integral Equation (MPIE) Formulation for Arbitrarily Shaped Conducting Objects in Plane-Stratified Uniaxial Media—A New Look 平面分层单轴介质中任意形状导电物体的混合势积分方程(MPIE)公式——新观点

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-04-27 DOI: 10.1109/JMMCT.2023.3271290

Krzysztof A. Michalski

引用次数: 0

Transient Electromagnetic Plane Wave Scattering by a Time-Varying Metasurface: A Time-Domain Approach Based on Reciprocity 时变超表面的瞬变电磁平面波散射:基于互易性的时域方法

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-04-19 DOI: 10.1109/JMMCT.2023.3268413

Martin Štumpf;Giulio Antonini;Jonas Ekman

引用次数: 0

Efficient Thermal Analysis of Integrated Circuits and Packages With Microchannel Cooling Using Laguerre-Based Layered Finite Element Method 采用基于laguerre的层状有限元方法对集成电路和微通道冷却封装进行有效热分析

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-04-06 DOI: 10.1109/JMMCT.2023.3265268

Bo Li;Min Tang;Ping Li;Junfa Mao

引用次数: 0

PEEC Model Based on a Novel Quasi-Static Green's Function for Two-Dimensional Periodic Structures 基于准静态格林函数的二维周期结构PEEC模型

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-04-05 DOI: 10.1109/JMMCT.2023.3263686

Yang Jiang;Yuhang Dou;Richard Xian-Ke Gao

{"title":"PEEC Model Based on a Novel Quasi-Static Green's Function for Two-Dimensional Periodic Structures","authors":"Yang Jiang;Yuhang Dou;Richard Xian-Ke Gao","doi":"10.1109/JMMCT.2023.3263686","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3263686","url":null,"abstract":"A quasi-static periodic Green's function (PGF) is proposed for modeling and designing metasurfaces in the form of two-dimensional (2D) periodic structures. By introducing a novel quasi-static approximation on the full-wave PGF in the spectrum domain, the quasi-static PGF is derived that can retain the contribution from propagating and evanescent modes below resonant frequency by a second-order polynomial of frequency. Unlike full-wave PGF, the proposed quasi-static PGF polynomial coefficients are frequency-invariant. Consequently, it can save the modeling time significantly by calculating the coefficients only once for a frequency band of interest. Moreover, a quasi-static PEEC model is developed from the proposed quasi-static PGF. It circumvents the breakdown problem around near-zero frequencies since the singularity in PGF is separated in the quasi-static PGF and eliminated analytically in model development. Therefore, both the time- and frequency-domain analysis can be conducted easily using a SPICE-like solver on the PEEC model. Two examples are given, one of which validates the accuracy of the proposed quasi-static PGF in a 2D periodic unit cell working at 0–12 GHz; the other demonstrates the superior performance in terms of model efficiency and stability by a Jerusalem-cross frequency selective surface (FSS) working at 0–20 GHz. The numerical results show that the proposed method is accurate and efficient in a wide band for metasurfaces made of two-dimensional periodic structures.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"187-194"},"PeriodicalIF":2.3,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49981541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

An Iterative Random Sampling Algorithm for Rapid and Scalable Estimation of Matrix Spectra 矩阵谱快速可扩展估计的迭代随机抽样算法

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-03-30 DOI: 10.1109/JMMCT.2023.3263152

Jon T. Kelley;Ali E. Yılmaz;Yaniv Brick

{"title":"An Iterative Random Sampling Algorithm for Rapid and Scalable Estimation of Matrix Spectra","authors":"Jon T. Kelley;Ali E. Yılmaz;Yaniv Brick","doi":"10.1109/JMMCT.2023.3263152","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3263152","url":null,"abstract":"An easy-to-implement iterative algorithm that enables efficient and scalable spectral analysis of dense matrices is presented. The algorithm relies on the approximation of a matrix's singular values by those of a series of smaller matrices formed from uniform random sampling of its rows and columns. It is shown that, for sufficiently incoherent and rank-deficient matrices, the singular values [are expected to] decay at the same rate as those of matrices formed via this sampling scheme, which permits such matrices’ ranks to be accurately estimated from the smaller matrices’ spectra. Moreover, for such a matrix of size \u0000<inline-formula><tex-math>$m times n$</tex-math></inline-formula>\u0000, it is shown that the dominant singular values are [expected to be] \u0000<inline-formula><tex-math>$sqrt {mn} /k$</tex-math></inline-formula>\u0000 times those of a \u0000<inline-formula><tex-math>$k times k$</tex-math></inline-formula>\u0000 matrix formed by randomly sampling \u0000<inline-formula><tex-math>$k$</tex-math></inline-formula>\u0000 of its rows and columns. Starting from a small initial guess \u0000<inline-formula><tex-math>$k = {k}_0$</tex-math></inline-formula>\u0000, the algorithm repeatedly doubles \u0000<inline-formula><tex-math>$k$</tex-math></inline-formula>\u0000 until two convergence criteria are met; the criteria to ensure that \u0000<inline-formula><tex-math>$k$</tex-math></inline-formula>\u0000 is sufficiently large to estimate the singular values, to the desired accuracy, are presented. The algorithm's properties are analyzed theoretically and its efficacy is studied numerically for small to very-large matrices that result from discretization of integral-equation operators, with various physical kernels common in electromagnetics and acoustics, as well as for artificial matrices of various incoherence and rank-deficiency properties.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"205-216"},"PeriodicalIF":2.3,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49981543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Accurate Prediction of Electric Fields of Nanoparticles With Deep Learning Methods 利用深度学习方法精确预测纳米粒子电场

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-03-23 DOI: 10.1109/JMMCT.2023.3260900

Mengmeng Li;Zixuan Ma

引用次数: 0

Numerical and Experimental Investigations of Flaws Detection in Multilayer HTS Tapes by Magnetothermal Technique 磁热技术在多层高温超导带缺陷检测中的数值与实验研究

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-03-11 DOI: 10.1109/JMMCT.2023.3275321

Walid Dirahoui;Hocine Menana

引用次数: 0

Performance of Inexpensive Local Error Estimation Techniques for Integral Equation Numerical Solutions 积分方程数值解的廉价局部误差估计技术的性能