Inductors and Transformers for Power Electronics: 1st Edition (Hardback) book cover

Inductors and Transformers for Power Electronics

1st Edition

By Vencislav Cekov Valchev, Alex Van den Bossche

CRC Press

478 pages | 246 B/W Illus.

Purchasing Options:$ = USD
Hardback: 9781574446791
pub: 2005-03-24
SAVE ~$43.00
$215.00
$172.00
x
eBook (VitalSource) : 9781315221014
pub: 2018-10-03
from $107.50


FREE Standard Shipping!

Description

Although they are some of the main components in the design of power electronic converters, the design of inductors and transformers is often still a trial-and-error process due to a long working-in time for these components. Inductors and Transformers for Power Electronics takes the guesswork out of the design and testing of these systems and provides a broad overview of all aspects of design.

Inductors and Transformers for Power Electronics uses classical methods and numerical tools such as the finite element method to provide an overview of the basics and technological aspects of design. The authors present a fast approximation method useful in the early design as well as a more detailed analysis. They address design aspects such as the magnetic core and winding, eddy currents, insulation, thermal design, parasitic effects, and measurements. The text contains suggestions for improving designs in specific cases, models of thermal behavior with various levels of complexity, and several loss and thermal measurement techniques.

This book offers in a single reference a concise representation of the large body of literature on the subject and supplies tools that designers desperately need to improve the accuracy and performance of their designs by eliminating trial-and-error.

Reviews

"This is a design manual for high-frequency transformers, especially for switching power supplies, interesting for: electronics design engineers, technicians, professors, and for technical libraries. …We warmly recommend to all specialists this clear, complete, up-to-date book."

IEEE Power Electronics Newsletter

"This book has enough depth and coverage of topics not found elsewhere that I am thankful to have a copy. Anyone who is serious about magnetics should invest in one. … To their credit, the authors use SI (metric) units—no Oersted and Gauss. The illustrations are well-designed, well-drawn and informative, and references are given at the end of the chapters. No problem sets appear; this is not a textbook but a resource for engineers—a resource worth having for power-electronics design efforts."

—Dennis Feucht, from How2Power Today, July 2015

Table of Contents

FUNDAMENTALS OF MAGNETIC THEORY

Basic Laws of Magnetic Theory

Magnetic Materials

Magnetic Circuits

References

FAST DESIGN APPROACH INCLUDING EDDY CURRENT LOSSES

Fast Design Approach

Examples

Conclusions

Appendix 2.A.1: Core Size Scale Law for Ferrites in Non-Saturated Thermal Limited Design

Appendix 2.A.2: Eddy Current Losses for Wide Frequency

Appendix 2.A.3: MathCAD Example Files

References

SOFT MAGNETIC MATERIALS

Magnetic Core Materials

Comparison and Applications of the Core Materials in Power Electronics

Losses in Soft Magnetic Materials

Ferrite Core Losses with Non-Sinusoidal Voltage Waveforms

Wide Frequency Model of Magnetic Sheets Including Hysteresis Effects

Appendix 3.A: Power and Impedance of Magnetic Sheets

References

COIL WINDING AND ELECTRICAL INSULATION

Filling Factor

Wire Length

Physical Aspects of Breakdown

Insulation Requirements and Standards

Thermal Requirements and Standards

Magnetic Component Manufacturing Sheet

References

EDDY CURRENTS IN CONDUCTORS

Introduction

Basic Approximations

Losses in Rectangular Conductors

Quadrature of the Circle Method for Round Conductors

Losses of a Current Carrying Round Conductor in 2-D Approach

Losses of a Round Conductor in a Uniform Transverse AC Field

Low Frequency 2-D Approximation Method for Round Conductors

Wide Frequency Method for Calculating Eddy Current Losses in Windings

Losses in Foil Windings

Losses in Planar Windings

Appendix 5.A.1: Eddy Current 1-D Model for Rectangular Conductors

Appendix 5.A.2: Low Frequency 2-D Models for Eddy Current Losses in Round Wires

Appendix 5.A.3: Field Factor For Inductors

References

THERMAL ASPECTS

Fast Thermal Design Approach (Level 0 Thermal Design)

Single Thermal Resistance Design Approach (Level 1 Thermal Design)

Classic Heat Transfer Mechanisms

Thermal Design Utilizing a Resistance Network

Contribution to Heat Transfer Theory of Magnetic Components

Transient Heat Transfer

Summary

Appendix 6.A: Accurate Natural Convection Modeling for Magnetic Components

References

PARASITIC CAPACITANCES IN MAGNETIC COMPONENTS

Capacitance Between Windings: Inter Capacitance

Self-Capacitance of a Winding: Intra Capacitance

Capacitance Between the Windings and the Magnetic Material

Practical Approaches for Decreasing the Effects of Parasitic Capacitances

References

INDUCTOR DESIGN

Air Coils and Related Shapes

Inductor Shapes

Typical Ferrite Inductor Shapes

Fringing in Wire-Wound Inductors with Magnetic Cores

Eddy Currents in Inductor Windings

Foil Wound Inductors

Inductor Types Depending on Application

Design Examples of Different Types of Inductors

Fringing Coefficients For Gapped-Wire-Wound Inductors

Analitical Modeling of Combined Litz Wire-Full Wire Inductors

References

TRANSFORMER DESIGN

Transformer Design in Power Electronics

Magnetizing Inductance

Leakage Inductance

Using Parallel Wires and Litz Wires

Interleaved Windings

Superimposing Frequency Components

Superimposing Modes

References

OPTIMAL COPPER/CORE LOSS RATIO IN MAGNETIC COMPONENTS

Simplified Approach

Loss Minimization in the General Case

Loss Minimization Without Eddy Current Losses

Loss Minimization Including Low-Frequency Eddy Current Losses

Summary

Examples

References

MEASUREMENTS

Introduction

Temperature Measurements

Power Losses Measurements

Measurement of Inductances

Core Loss Measurements

Measurement of Parasitic Capacitances

Combined Measuring Instruments

References

APPENDIX A: RMS VALUES OF WAVEFORMS

Definitions

RMS Values of Some Basic Waveforms

RMS Values of Common Waveforms

APPENDIX B: MAGNETIC CORE DATA

ETD Core Data (Economic Transformer Design Core)

EE Core Data

Planar EE Core Data

ER Core Data

UU Core Data

Ring Core Data (Toroid Core)

P Core Data (Pot Core)

PQ Core Data

RM Core Data

APPENDIX C: COPPER WIRES DATA

Round Wire Data

American Wire Gauge Data

Litz Wire Data

APPENDIX D: MATHEMATICAL FUNCTIONS

References

INDEX

Subject Categories

BISAC Subject Codes/Headings:
TEC007000
TECHNOLOGY & ENGINEERING / Electrical
TEC008000
TECHNOLOGY & ENGINEERING / Electronics / General