Author: Perry
Publisher: CRC Press
ISBN: 9780824774530
Category : Technology & Engineering
Languages : en
Pages : 264
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Book Description
This book provides a detailed investigation of steady-state "eddy current" analysis and electromechanical processes relying on low frequency electromagnetic induction. It also presents classical one- and two-dimensional formulations for coils, cables, and induction motors.
Author: Perry
Publisher: Routledge
ISBN: 1351434578
Category : Technology & Engineering
Languages : en
Pages : 256
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Book Description
In an historical context, the development of electromagnetic theory and anaylsis has undergone many evolutionary changes since the 19th century. Faraday's 1831 discovery of the magnetic induction principle was at first a scientific curisoity, then a subject of intense intellectual activity resulting in the infication of the macroscopic electromagnetic principles through Maxwell's equations. One of the subdisciplines created by the discovery of electromagnetic induction and its theoretical foundation was the anaylsis of specific arrangements of ponderable bodies, including conductors which interact with electromagnetic fields to produce the measurable phyiscal effects which we call heat and mechanical force. This book is intended neither as a suppliment or replacement for previous texts, however, a number of conductor arrangements are covered here which are not done elsewhere. It is primarily for industrial use; where insight into the physical processes may be of practical value.
Author: Perry
Publisher: Routledge
ISBN: 135143456X
Category : Technology & Engineering
Languages : en
Pages : 157
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Book Description
In an historical context, the development of electromagnetic theory and anaylsis has undergone many evolutionary changes since the 19th century. Faraday's 1831 discovery of the magnetic induction principle was at first a scientific curisoity, then a subject of intense intellectual activity resulting in the infication of the macroscopic electromagnetic principles through Maxwell's equations. One of the subdisciplines created by the discovery of electromagnetic induction and its theoretical foundation was the anaylsis of specific arrangements of ponderable bodies, including conductors which interact with electromagnetic fields to produce the measurable phyiscal effects which we call heat and mechanical force. This book is intended neither as a suppliment or replacement for previous texts, however, a number of conductor arrangements are covered here which are not done elsewhere. It is primarily for industrial use; where insight into the physical processes may be of practical value.
Author: Stephen Ronald Landers
Publisher:
ISBN:
Category : Electromagnetic induction
Languages : en
Pages : 92
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Book Description
Author: Min Li
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
"This thesis presents an automated topological design system for low frequency electromagnetic devices, e.g. an interior permanent magnet motor. The automated design is carried out through a topological shape optimization process: first, the system employs a topological sensitivity analysis to examine the design domain and to determine the optimal topology (distribution of source and materials); second, the system uses a shape optimizer to further improve the design; these two steps are performed alternately until the optimality condition is satisfied. The robustness of a topology with respect to small variations on its geometries is studied and a robustness measure is defined, originally in the thesis, as the worst case performance of an objective function for the topology and shape optimization. Therefore, the idea of robust design can be applied to the conceptual design (topological design) of electrical machines. Other than the application to motor design, the topology optimization algorithm developed in the thesis, was used originally in the non-destructive testing for quickly location and accurately shape reconstruction of cracks." --
Author: Hussein Moghnieh
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
"The design and analysis of low frequency electromagnetic devices on digital computers using the Finite Element Method (FEM) are computationally expensive and time-consuming. In the past decade, assiduous efforts have been dedicated to exploring and exploiting the parallelism of specific FEM kernels with the aim of enhancing their performance on multi-core processors. Despite having proved advantageous in promoting the speed of specific kernels, how this approach globally impacts the time duration required for the completion of the design process remains unclear, so is the question of whether such an approach takes full advantage of the capacity of multi-core processors. We attempted to overcome these caveats by applying a holistic approach that focuses on the parallel performance of key FEM components, mainly mesh generation, matrix assembly and Preconditioned Conjugate Gradient (PCG). Our investigation generated three main findings. First, we show that two factors, namely the degrees and exploitation techniques of parallelism differ among the kernels of the FEM solver component using PCG. This fact leads to low thread utilization and a waste of computational resources. Second, contrary to the notion that fine-grained multi-threaded algorithms, albeit involving much synchronization, do not affect the time efficiency of multi-core processors, we show that fine-grained multi-threaded algorithms can in fact be time costly in certain cases involving multi-core processors, particularly so when the ratio of computation runtime to synchronization runtime is relatively small. Third, we found the performance level of algorithms to be inversely related to the size of the problem, suggesting that using domain decomposition techniques to solve smaller problems is likely to pay off. These findings support the argument that instead of exploring parallelism in single components, a holistic approach focusing on the global design process would be more valuable. " --
Author: Chi-Chih Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 328
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Book Description
Author: Sergey N. Makarov
Publisher: John Wiley & Sons
ISBN: 1119052467
Category : Science
Languages : en
Pages : 616
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Book Description
Provides a detailed and systematic description of the Method of Moments (Boundary Element Method) for electromagnetic modeling at low frequencies and includes hands-on, application-based MATLAB® modules with user-friendly and intuitive GUI and a highly visualized interactive output. Includes a full-body computational human phantom with over 120 triangular surface meshes extracted from the Visible Human Project® Female dataset of the National library of Medicine and fully compatible with MATLAB® and major commercial FEM/BEM electromagnetic software simulators. This book covers the basic concepts of computational low-frequency electromagnetics in an application-based format and hones the knowledge of these concepts with hands-on MATLAB® modules. The book is divided into five parts. Part 1 discusses low-frequency electromagnetics, basic theory of triangular surface mesh generation, and computational human phantoms. Part 2 covers electrostatics of conductors and dielectrics, and direct current flow. Linear magnetostatics is analyzed in Part 3. Part 4 examines theory and applications of eddy currents. Finally, Part 5 evaluates nonlinear electrostatics. Application examples included in this book cover all major subjects of low-frequency electromagnetic theory. In addition, this book includes complete or summarized analytical solutions to a large number of quasi-static electromagnetic problems. Each Chapter concludes with a summary of the corresponding MATLAB® modules. Combines fundamental electromagnetic theory and application-oriented computation algorithms in the form of stand alone MATLAB® modules Makes use of the three-dimensional Method of Moments (MoM) for static and quasistatic electromagnetic problems Contains a detailed full-body computational human phantom from the Visible Human Project® Female, embedded implant models, and a collection of homogeneous human shells Low-Frequency Electromagnetic Modeling for Electrical and Biological Systems Using MATLAB® is a resource for electrical and biomedical engineering students and practicing researchers, engineers, and medical doctors working on low-frequency modeling and bioelectromagnetic applications.
Author: Caroline Livan Anyi
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
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Book Description
Author: Francis Piriou
Publisher: John Wiley & Sons
ISBN: 1786308118
Category : Science
Languages : en
Pages : 324
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Book Description
Numerical modeling now plays a central role in the design and study of electromagnetic systems. In the field of devices operating in low frequency, it is the finite element method that has come to the fore in recent decades. Today, it is widely used by engineers and researchers in industry, as well as in research centers. This book describes in detail all the steps required to discretize Maxwell’s equations using the finite element method. This involves progressing from the basic equations in the continuous domain to equations in the discrete domain that are solved by a computer. This approach is carried out with a constant focus on maintaining a link between physics, i.e. the properties of electromagnetic fields, and numerical analysis. Numerous academic examples, which are used throughout the various stages of model construction, help to clarify the developments.
