# IEEE Transactions on Magnetics

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Displaying Results 1 - 25 of 261
• ### [Front cover]

Publication Year: 2008, Page(s): C1
| PDF (249 KB)
• ### IEEE Transactions on Magnetics publication information

Publication Year: 2008, Page(s): C2
| PDF (39 KB)

Publication Year: 2008, Page(s):657 - 673
| PDF (127 KB)
• ### Message From the Conference Chair

Publication Year: 2008, Page(s): 674
| PDF (68 KB) | HTML
• ### Message From the Editorial Board Chairs

Publication Year: 2008, Page(s): 675
| PDF (192 KB) | HTML
• ### COMPUMAG 2007 Editorial Board

Publication Year: 2008, Page(s):676 - 677
| PDF (19 KB)
• ### New Linear Motor Concepts for Artificial Hearts

Publication Year: 2008, Page(s):678 - 681
Cited by:  Papers (21)
| | PDF (654 KB) | HTML

Total artificial hearts (TAHs), available in today's market, have the disadvantage of wear-prone components. Thus, their expectation of life is limited and the devices can only be used for temporary and not destination therapy. Durability- and wear-free operations are the critical requirements, as failure is an immediate threat to the patient's life. These attributes are combined in linear motors.... View full abstract»

• ### A Robust Maxwell Formulation for All Frequencies

Publication Year: 2008, Page(s):682 - 685
Cited by:  Papers (23)
| | PDF (567 KB) | HTML

A novel unified method for the stable numerical solution of the time-harmonic Maxwell's equations for any frequency is presented. The method is based on an extended variational formulation of the full linear Maxwell's equations. This formulation avoids stability problems in the stationary limit, where it reduces to the equations of electrostatics and magnetostatics. Both capacitive and inductive e... View full abstract»

• ### Estimating the Eddy-Current Modeling Error

Publication Year: 2008, Page(s):686 - 689
Cited by:  Papers (15)
| | PDF (327 KB) | HTML

The eddy-current model is an approximation of the full Maxwell equations. We will give estimates for the modeling error and show how the constants in the estimates are influenced by the geometry of the problem. Additionally, we analyze the asymptotic behavior of the modeling error when the angular frequency tends to zero. The theoretical results are complemented by numerical examples using high or... View full abstract»

• ### Reinterpretation of the Nodal Force Method Within Discrete Geometric Approaches

Publication Year: 2008, Page(s):690 - 693
Cited by:  Papers (4)
| | PDF (198 KB) | HTML

We propose a geometric reinterpretation of the Nodal Force Method in the framework of a pair of discrete formulations for magnetostatics on complementary meshes. View full abstract»

• ### Constitutive Matrices Using Hexahedra in a Discrete Approach for Eddy Currents

Publication Year: 2008, Page(s):694 - 697
Cited by:  Papers (7)
| | PDF (355 KB) | HTML

We examine the construction of reluctivity and Ohm's constitutive matrices for discrete geometric approaches using nonregular hexahedra as primal volumes. The effect of element deformation on the representation of uniform fields have been investigated for static fields. Then convergence and accuracy of the proposed matrices has been carried out using an eddy-current problem as working example. View full abstract»

• ### Eddy-Currents Computation With T-$Omega$ Discrete Geometric Formulation for an NDE Problem

Publication Year: 2008, Page(s):698 - 701
Cited by:  Papers (3)
| | PDF (258 KB) | HTML

We propose a discrete geometric formulation based on a magnetic scalar potential and on the circulation of an electric vector potential to solve eddy-current problems for nondestructive evaluation of steel bars with longitudinal defects. View full abstract»

• ### A Coupled Thermo-Electromagnetic Formulation Based on the Cell Method

Publication Year: 2008, Page(s):702 - 705
Cited by:  Papers (8)
| | PDF (312 KB) | HTML

Two discrete approaches for 3-D weakly coupled thermo-electromagnetic, magnetically linear, quasi-static problems in bounded domains are presented and compared. Both approaches are based, as far as the electromagnetic equations are concerned, on discrete potentials to model both conducting and nonconducting regions, whereas the thermal problem is solved by direct use of the temperature as unknown.... View full abstract»

• ### Hierarchical FIT/FE Discretization for Dielectric Subcell Interfaces

Publication Year: 2008, Page(s):706 - 709
Cited by:  Papers (2)
| | PDF (428 KB) | HTML

The discretization of an electrostatic problem by the finite integration technique (FIT) is augmented with specialized finite-element shape functions for resolving dielectric interfaces that are not resolved by the Cartesian grid. The numerical validation shows that the achieved accuracy matches the one of a conformal discretization. The additional approximation space is implemented as a perturbat... View full abstract»

• ### Construction of Differential Material Matrices for the Orthogonal Finite-Integration Technique With Nonlinear Materials

Publication Year: 2008, Page(s):710 - 713
Cited by:  Papers (8)
| | PDF (437 KB) | HTML

The linearization of an electromagnetic formulation by the Newton method can be expressed similarly as for the linear case, by introducing differential material matrices. For the case of the finite-integration technique applied to an orthogonal grid, the chord material matrix is diagonal whereas the differential material matrices includes off-diagonal bands, representing the cross-directional coup... View full abstract»

• ### Network Representation of Conducting Regions in 3-D Finite-Element Description of Electrical Machines

Publication Year: 2008, Page(s):714 - 717
Cited by:  Papers (13)
| | PDF (716 KB) | HTML

The paper introduces a network description of conducting regions in electrical machines. Resistance models are considered, where loop equations are equivalent to an edge element formulation using the electric vector potential T, as well as conductance models, for which the nodal equations refer to a nodal element description by means of the scalar potential V. Network models for multiply connected... View full abstract»

• ### Nonlinear T- $Omega$ Formulation Including Motion for Multiply Connected 3-D Problems

Publication Year: 2008, Page(s):718 - 721
Cited by:  Papers (9)
| | PDF (535 KB) | HTML

An automatic cut generation algorithm based on the tree/co-tree technique is presented for treating multiply connected regions in 3D transient solutions including rigid motion. In the cutting domains, the zero curl condition of vector potential is strongly imposed. As part of the algorithm, a separation technique is introduced to confine the generation of each cutting domain to either the stationa... View full abstract»

• ### Hybrid Finite-Element, Spectral-Element Discretization for Translatory Symmetric Model Parts

Publication Year: 2008, Page(s):722 - 725
Cited by:  Papers (4)
| | PDF (548 KB) | HTML

The superior convergence properties of orthogonal polynomials are exploited along the direction of symmetry of a translatory symmetric model part. In the perpendicular directions and in the remaining model parts, standard finite elements are applied. The examples indicate a substantial saving of computational resources for both the 2D and 3D case. View full abstract»

• ### Extraction of Finite Element Basis Functions From the Cellular Topology of Meshes

Publication Year: 2008, Page(s):726 - 729
| | PDF (253 KB) | HTML

This paper is devoted to the presentation of a simple but powerful topological approach for the computation of basis functions involved in the expression of finite element interpolants. It deals with the so-called nodal and edge elements but similar considerations can be made for the construction of facet ones. All standard cells are treated including pyramids. View full abstract»

• ### Circuit-Coupled ${bf t}_{0}hbox {-}phi$ Formulation With Surface Impedance Condition

Publication Year: 2008, Page(s):730 - 733
Cited by:  Papers (6)
| | PDF (276 KB) | HTML

A finite-element formulation based on the use of magnetic scalar potential is proposed. It allows to describe circuit-coupled electromagnetic formulation using magnetic scalar potential in presence of multiply connected solid conductors (with holes), treated by surface impedance condition. This formulation offers powerful solutions at a low cost. An example of application is given. View full abstract»

• ### Error Evaluation of Surface Impedance Boundary Conditions With Magnetic Vector Potential Formulation on a Cylindrical Test Problem

Publication Year: 2008, Page(s):734 - 737
Cited by:  Papers (2)
| | PDF (676 KB) | HTML

Surface impedance boundary conditions (SIBCs) are used for analysis of a wide range of practical applications such as micro strips, transformers or electrical machines. In this work the SIBC was implemented with classical edge elements using the magnetic vector potential. As known, the SIBC is afflicted with errors when it is being used on curved surfaces and near corners and edges. For this reaso... View full abstract»

• ### Subdomain Perturbation Finite-Element Method for Skin and Proximity Effects

Publication Year: 2008, Page(s):738 - 741
Cited by:  Papers (8)
| | PDF (405 KB) | HTML

Skin and proximity effects are calculated in both active and passive conductors via a subproblem finite-element method based on a perturbation technique. A reference limit problem considering either perfectly electric or magnetic conductors is first solved. It gives the source for eddy-current perturbation subproblems in each conductor with its actual conductivity or permeability and its own mesh.... View full abstract»

• ### Time-Domain Finite-Element Modeling of Thin Electromagnetic Shells

Publication Year: 2008, Page(s):742 - 745
Cited by:  Papers (10)
| | PDF (214 KB) | HTML

In this paper, the authors propose a novel time-domain extension of the well-known frequency-domain thin-shell approach. The time-domain interface conditions at the shell surface are expressed in terms of the average (zero-order) instantaneous flux and current density vectors in the shell, as well as in terms of a limited number of higher-order components. The method is elaborated for a magnetic v... View full abstract»

• ### An Iterative Finite Element Perturbation Method for Computing Electrostatic Field Distortions

Publication Year: 2008, Page(s):746 - 749
Cited by:  Papers (2)
| | PDF (254 KB) | HTML

A finite element perturbation method is developed for computing electrostatic field distortions and the ensuing charges and forces on moving conductive regions subjected to fixed potentials. It is based on the subsequent solution of an unperturbed problem in a complete domain, where conductive regions have been extracted, and of perturbation problems in subdomains restricted to the surroundings of... View full abstract»

• ### An Efficient High-Order Extrapolation Procedure for Multiaspect Electromagnetic Scattering Analysis

Publication Year: 2008, Page(s):750 - 753
Cited by:  Papers (2)
| | PDF (480 KB) | HTML

This paper presents a new high-order extrapolation procedure for computing multiaspect electromagnetic scattering characteristics for arbitrarily shaped 3-D conducting targets. The method aims to reduce the number of simulation angles required to resolve a monostatic radar cross section when the method of moments is used for perfect electrically conducting targets. The methodology developed in thi... View full abstract»

## Aims & Scope

IEEE Transactions on Magnetics is a peer-reviewed, archival journal in science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage. The journal publishes scholarly articles of archival value as well as tutorial expositions and critical reviews of classical subjects and topics of current interest.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Pavel Kabos
National Institute of Standards and Technology