<p><span>The book is devoted to the solution of one general problem of the theory of a three-dimensional quasi-stationary sinusoidal and pulse electromagnetic field. These studies, unlike many well-known works, are based on obtained exact analytical solution of the problem for the field, generated b
Interactions Between Electromagnetic Field and Moving Conducting Strip (Lecture Notes in Electrical Engineering, 1111)
â Scribed by Ihor Kondratenko, Yuriy Vasetsky, Artur Zaporozhets
- Publisher
- Springer
- Year
- 2023
- Tongue
- English
- Leaves
- 129
- Category
- Library
No coin nor oath required. For personal study only.
⌠Synopsis
The book combines two interrelated lines of research. One of them is devoted to the development of the theory for solving a certain class of three-dimensional electromagnetic field problems of the three-dimensional electromagnetic field, taking into account eddy currents in a moving conducting magnetizing body. Preference is given to the development of the analytical solution methods of the three-dimensional quasi-stationary problem of field conjugation in the system: âa contour of an arbitrary spatial configuration with an alternating current is conducting body with a flat boundary surfaceâ. The second direction refers to the development of mathematical models for solving applied problems, which involve the use of developed methods for calculating the electromagnetic field and their characteristics. The main application of calculation methods is aimed at solving problems of heat treatment non-ferrous and ferrous metal products using the induction method of heating in a transverse magnetic field. The inverse problems are solved to determine the inductor configuration as flat and spatial current contours for providing the necessary temperature distribution of moving metal strips. To achieve uniform heating of strips across the width using inductors in the form of flat current contours parallel to the strip surface, it is advisable to use combinations of current contours, where the geometric dimensions are determined by the size and electro-physical parameters of the metal strips. A more uniform temperature distribution during high-frequency induction heating is achieved by using inductors in the form of current contours of the required spatial configuration.
The book is intended for researchers, postgraduate students, and students specialized in theory and calculations of electromagnetic fields and induction heating installations.
⌠Table of Contents
Preface
Contents
About the Authors
Mathematical Models of Electromagnetic Interaction of Field Sources with Conducting Body
1 Introduction
2 Mathematical Model for Calculation of Electromagnetic Field Created by Sources Near Conducting Half-Space
2.1 Exact Analytical Solution of the Three-Dimensional Problem
2.2 Asymptotic Expansion Method for Approximate Calculation of the Electromagnetic Field
2.3 Approximate Mathematical Model of the Diffusion Electromagnetic Field into Conducting Half-Space for Calculation of the Field Near Current Contour
3 The Electromagnetic Energy Flux During High-Frequency Induction Heating of Moving Conducting Strips
3.1 Small Parameters for the Formulation of an Approximate Mathematical Model
3.2 Electromagnetic Energy Flux Density into Heating Metal Strip
4 Assessment of the Main Parameters of the Heating Process
4.1 Temperature Stabilisation Along Thickness
4.2 Heat Transfer Along Surface of Metal Strip
5 Conclusions
References
Configuration of Spatial Iron-Free Inductors for High-Frequency Induction Heating of Metal Strips
1 Introduction
2 Mathematical Model of the Electromagnetic System for High-Frequency Heating of Metal Strips
2.1 The Main Assumptions at High-Frequency Heating of Metal Strips
2.2 Geometric Parameters of the Spatial Configuration Contours
2.3 Some Examples of Calculating the Distribution of Active Power Flow Through the Surface of a Metal Strip
3 Geometric Parameters of Spatial Contours with Current (h = var, R = const) for Leveling Heating of Metal Strips
3.1 Estimation of the Ratio of the Height of the Contour Edge to the Height of the Central Part According to the Condition of Heat Release Equality
3.2 Geometric Parameters, Provided that the Temperature Across the Width Does not Exceed the Specified Value
3.3 Geometric Parameters in Case, When the Temperature Does not Exceed the Set Maximum Value
3.4 Contour Configurations in the Case of Minimal Deviation at a Given Value
3.5 Some Examples of Inductor Geometry for Leveling Heating of Metal Strips
4 Flat Elliptical Contours (h = const, R = var)
5 Features of the Application of the Asymptotic Method for the Study of Induction Heating of Limited Width Conducting Strips
5.1 Mathematical Model for Calculating the Electromagnetic Field of the Current Contour Over Conductive Strip of Limited Width
5.2 Geometric Parameters of the Electromagnetic System for Induction Heating of a Metal Strip of Limited Width with Minimum Temperature Non-uniformity Along Its Width
6 Conclusions
References
Electromagnetic Systems of Transverse Magnetic Flux with Ferromagnetic Core for Induction Heating Devices
1 Introduction
2 Main Equations
3 Magnetic Field of Transverse Magnetic Flux Inductors with Ferromagnetic Core
4 Energy Characteristics and Electromagnetic Forces in Multi-pole Single-Phase Inductor
5 Induction Heating of Strips in Single-Phase Inductor
6 Conclusions
References
Electromagnetic Systems with Iron-Free Inductors for Induction Heating of Moving Strip in Transverse Magnetic Field
1 Introduction
2 General Solution of the Electromagnetic and Temperature Problem During Heat Treatment of a Moving Strip by Iron-Free Inductors as Arbitrary Planar Contours
3 Heat Treatment of Moving Strip by Iron-Free Inductors as Current Contours of Canonical Form
3.1 Rectangular Current Contour
3.2 Current Contour in the Form of a Rhombus
3.3 Current Contour in the Form of an Ellipse
4 Influence of the Finite Height of the Winding Cross-Section on the Energy Characteristics of the Inductor
5 Conclusions
References
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