Results 1  10
of
26
Volume Integral Equations in Nonlinear 3D Magnetostatics
, 1994
"... this paper a discussion of volume integral formulations in threedimensional nonlinear magnetostatics is presented. Integral formulations are examined in connection with Whitney's elements in order to find new approaches. A numerical algorithm based on an hformulation is introduced. Results of ..."
Abstract

Cited by 7 (6 self)
 Add to MetaCart
this paper a discussion of volume integral formulations in threedimensional nonlinear magnetostatics is presented. Integral formulations are examined in connection with Whitney's elements in order to find new approaches. A numerical algorithm based on an hformulation is introduced. Results of demanding application problems are shown demonstrating the characteristics of this kind of volume integral approach. In addition, a discussion of the parallelized version of the numerical code based on the htype approach is presented, appended with numerical results illustrating the advantages of combining integral formulations with concurrent computing. INTRODUCTION A numerical approximation for static or lowfrequency electromagnetic problems can be computed with either partial differential equations (PDEs) or integral equations. Partial differential equations are often favorable because they offer costeffective solutions for threedimensional problems. Integral equations have their own advantages; for example, air regions can be excluded, and the exterior boundary condition (i.e., that the magnetic field vanishes in infinity) is satisfied automatically (see, e.g., [1], [2]). Moreover, in linear problems, boundary integral equations give often a reasonably accurate solution with a relative small number of unknowns. During the past twenty years PDEs have dominated research in the field of numerical computation of lowfrequency electromagnetic fields, and they have almost overwhelmed the developments in integral formulations. Probably one of the main reasons that integral equations have not attracted researchers as much as PDEs is the dense integral equation matrix. It is well known that iterative solvers such as ICCG (incomplete Choleski factorization, conjugate gradient) are ...
Characterization and optimization of liquid electrodes for lateral dielectrophoresis
, 2006
"... ..."
Analytical calculation of static leakage inductances of H.F. transformers Using PEEC Formulas
 IEEE Transactions on Industry Applications
, 2007
"... Abstract—When the total current going through a transformer window is equal to zero, only a negligible part of the magnetic energy reaches its core. This is shown by finiteelementmethod simulations carried out on several twowinding transformers having different shapes. Moreover, induction and ene ..."
Abstract

Cited by 3 (1 self)
 Add to MetaCart
(Show Context)
Abstract—When the total current going through a transformer window is equal to zero, only a negligible part of the magnetic energy reaches its core. This is shown by finiteelementmethod simulations carried out on several twowinding transformers having different shapes. Moreover, induction and energydensity values obtained by 3D simulations and by 2D approximations are very close to each other. These two key observations justify the use of formulas that give the induction created by straight rectangular crosssectional wires, as used in the partialelementequivalentcircuit method, to compute the window field and, thus, to value the leakage inductances. To refine this approach, weak magneticcore effects are accounted for by introducing the magnetic images of currents that flow in the windings. A comparison between the calculated values and measured ones is provided. Index Terms—Analytical calculation, equivalent circuit, leakage inductance, partialelementequivalentcircuit (PEEC) method, transformer. I.
Capacitances in microstrip detectors: a conformal mapping approach
, 909
"... The knowledge of capacitance in semiconductor microstrip detectors is important for a correct design, simulation and understanding of the detectors. Analytical approaches can efficiently complement numerical methods providing quick results in the design phase. The conformal mapping method has prove ..."
Abstract

Cited by 2 (0 self)
 Add to MetaCart
(Show Context)
The knowledge of capacitance in semiconductor microstrip detectors is important for a correct design, simulation and understanding of the detectors. Analytical approaches can efficiently complement numerical methods providing quick results in the design phase. The conformal mapping method has proved to be the most effective analytical approach providing many realistic models [1][2]. In this paper improved analytical results are presented and compared with experimental data. The excellent agreement between predictions and measurements confirms the relevance of this approach to modeling realistic detectors.
OPTIMAL DESIGN OF NONLINEAR MAGNETIC SYSTEMS USING FINITE ELEMENTS
"... öğeler yöntermi geliştirilmiştir. Ağırlaştırılmış Lagrange çarpanları yöntermi kullanılarak en küçük kareler ..."
Abstract
 Add to MetaCart
(Show Context)
öğeler yöntermi geliştirilmiştir. Ağırlaştırılmış Lagrange çarpanları yöntermi kullanılarak en küçük kareler
Volume Integral Equations in Nonlinear 3D
"... In this paper a discussion of volume integral formulations in threedimensional nonlinear magnetostatics is presented. Integral formulations are examined in connection with Whitney's elements in order to nd new approaches. A numerical algorithm based on an hformulation is introduced. Results ..."
Abstract
 Add to MetaCart
(Show Context)
In this paper a discussion of volume integral formulations in threedimensional nonlinear magnetostatics is presented. Integral formulations are examined in connection with Whitney's elements in order to nd new approaches. A numerical algorithm based on an hformulation is introduced. Results of demanding application problems are shown demonstrating the characteristics of this kind of volume integral approach. In addition, a discussion of the parallelized version of the numerical code based on the htype approach is presented, appended with numerical results illustrating the advantages of combining integral formulations with concurrent computing.
MODERN DESIGN OF ELECTROMECHANICAL DEVICES
"... Abstract The paper provides an overview of the modern field simulation techniques available to assist in the design and performance prediction of electromechanical devices, including electric motors. Commercial software, usually based on finite element or related techniques, is already very advance ..."
Abstract
 Add to MetaCart
Abstract The paper provides an overview of the modern field simulation techniques available to assist in the design and performance prediction of electromechanical devices, including electric motors. Commercial software, usually based on finite element or related techniques, is already very advanced and provides a reliable tool for everyday use in the design office. At the same time Computational Electromagnetics is a thriving area of research with emerging new techniques and methods, in particular for multiphysics and optimisation problems. I. II.
unknown title
"... Solution for the electric potential distribution produced by sphereplane electrodes using the method of images (Solução para a distribuição do potencial elétrico produzido por eletrodos esferaplano usando o método das imagens) ..."
Abstract
 Add to MetaCart
(Show Context)
Solution for the electric potential distribution produced by sphereplane electrodes using the method of images (Solução para a distribuição do potencial elétrico produzido por eletrodos esferaplano usando o método das imagens)