TRANSFORMERS AND INDUCTORS FOR POWER ELECTRONICS BY W. G. Hurley and W. H. We olfle

TRANSFORMERS AND INDUCTORS FOR POWER ELECTRONICS BY W. G. Hurley and W. H. We olfle

Contents:

Chapter 1 Introduction

Chapter 2 Inductance

Chapter 3 Inductor Design

Chapter 4 Transformers

Chapter 5 Transformer Design

Chapter 6 High Frequency Effects in the Windings

Chapter 7 High Frequency Effects in the Core

Chapter 8 Measurements

Chapter 9 Planar Magnetics

Chapter 10 Variable Inductance

Preface:

The design of magnetic components such as transformers and inductors has been of interest to electronic and electrical engineers for many years. Traditionally, treatment of the topic has been empirical, and the ‘cook-book’ approach has prevailed. In the past, this approach has been adequate when conservative design was acceptable. In recent years, however, space and cost have become premium factors in any design, so that the need for tighter designs is greater. The power supply remains one of the biggest components in portable electronic equipment. Power electronics is an enabling technology for power conversion in energy systems. All power electronic converters have magnetic components in the form of transformers for power transfer and inductors for energy storage. The momentum towards high-density, high-efficiency power supplies continues unabated. The key to reducing the size of power supplies is high-frequency operation, and the bottle neck is the design of the magnetic components. New approaches are required, and concepts that were hitherto unacceptable to the industry are gaining ground, such as planar magnetics, integrated magnetics and matrix configurations. The design of magnetic components is a compromise between conflicting demands. Conventional design is based on the premise that the losses are equally divided between the core and the winding. Losses increase with frequency, and high-frequency design must take this into account.