File Name: analysis and computation of electric and magnetic field problems .zip
- Measuring and calculating EMFs
- Electromagnetic field
- Analysis and Computation of Electric and Magnetic Field Problems
Electromagnetism is a branch of physics involving the study of the electromagnetic force , a type of physical interaction that occurs between electrically charged particles.
Measuring and calculating EMFs
Finite Element Method for Exterior Problems. Automatic and Adaptive Mesh Generation. Integral Equation Method. Static Magnetic Problem. Eddy Current Problem. Back Matter Pages About this book Introduction Since the first edition of this book was published in , there have been several important changes in the state of numerical field computation, as discussed in the Introduction.
These changes have motivated the publication of this second edition. As with the first edition, the objective of this second edition is to give the newcomer to field computation the information needed to perform practical field computations. Again, clarity of presentation is given greater emphasis than a high degree of sophistication or the state of the art. And again, the basic concepts of field computation are presented as well as the commonly used algorithms.
Several persons have provided much valuable information for this second edition. Emson of Vector Fields, Ltd. Zoltan Cendes of Ansoft Corp.
Again, I would like to acknowledge the support for this second edition by my wife, Candace. Again, I could not have written this book without her support.
We define the incident electric field in medium 1 as. Comsol Multiphysics V5. The distribution of potential and electric field, field emission current are obtained by simulating with the help of COMSOL Multiphysics 4. Used field and intensity plots. Electric field and electrostatic simulation software to calculate the electric and electrostatic field caused by known charges and voltage distribution.
The present paper aims to compare Harrington's direct method of moment MoM with the conjugate gradient method CGM by evaluating the total current solving the electric field integral equation EFIE. Based on their performances, the number of iterations needed for convergence, storage, and the level of precision, it is found that the direct MoM is more efficient than other iterative CGM. In this paper, we consider the integral electromagnetic field equation EFIE for computing the total current distribution on antenna surfaces, and we study the two standard methods by comparing the solutions. These methods are the direct method of moment MoM for short developed by Harrington [ 1 ] and the iterative conjugate gradient method CGM [ 2 ]. This comparative study, which is done at the level of numerical solutions, is achieved in terms of computational advantages and disadvantages as well as their ability to determine the current distributions on metal surfaces. Based on their performance, the number of iterations needed for convergence, the storage, and the level of precision, it comes out from our analysis, developed in the next sections, that the direct method MoM is more efficient than other iterative CGM.
Analysis and Computation of Electric and Magnetic Field Problems
Analysis and Computation of Electric and Magnetic Field Problems, Second Edition is a comprehensive treatment of both analytical and numerical methods for the derivation of two-dimensional static and quasi-static electric and magnetic fields. The essence of each method of solution is emphasized and the scopes of the different methods are described, with particular regard to the influence of digital computers. This book is comprised of 12 chapters and begins with an introduction to the fundamental theory of electric and magnetic fields. The derivation of quantities of physical interest such as force, inductance, and capacitance from the field solution is explained.
It is quite easy to measure magnetic fields. Instruments are usually based on search coils though other types exist as well and can be small and handheld, or larger and more sophisticated. Measuring electric fields is possible too but harder because the person making the measurement often perturbs the field. Calculations of EMFs are also easy for sources like overhead lines and underground cables that have clearly defined geometries. This is a summary of instruments for measuring fields.
Premium Membership. Learn from experienced power engineers. In relation with the increased use of mobile phones during the last decades more concerns about possible harmful effects of electro-magnetic fields to human beings have been expressed.
Electromagnetic field problems arising in electrical machinery and devices are in general truly three dimensional in nature. In many devices natural excitation is the voltage excitation, for example: relays and electrical motor. Several research papers have been published on the subject of three dimensional field solutions.
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