This third edition has brought together all of the pertinent information in 21 chapters, under one cover that is required to either, design or analyze transformers and inductors. This new edition starts at the basic fundamentals of magnetics and brings the reader up to the design using the Kg or Ap approach. This new edition contains all necessary information required to do a complete design. It contains a wire table and over 250 cores, which includes laminations, tape cores, powder cores and ferrites, including planar ferrites, also there is core loss data on 18 iron alloys at different thicknesses, 25 powder cores that includes MPP, high flux, sendust and powdered iron, 3 amorphous materials and 7 ferrite materials at different frequencies. This book has 523 pages and contains 397 illustrations, 118 tables and 17 design examples to give the reader a complete comprehensive view on magnetics design.

Chapter Highlights

Chapter 1 Fundamentals of Magnetics (29 pages)

Chapter 1 deals with the basics and covers the magnetic field, the simple transformer, the magnetic core, the hysteresis loop (B-H Loop), permeability, the air gap, and the fringing flux.

Chapter 2 Magnetic Materials and Their Characteristics (54 pages)

Chapter 2 deals with 19 different magnetic materials including iron alloys, ferrites, amorphous and powder cores and their characteristics, such as: the B-H loop, permeability, remanence flux, and core loss.

Chapter 3 Magnetic Cores (48 pages)

Chapter 3 contains design data for 250 magnetic cores in sixty-four tables. The core configurations include laminations, tape cores, powder cores and ferrites. There is also information on eddy currents and flux crowding.

Chapter 4 Window Utilization, Magnet Wire and Insulation (41 pages)

Chapter 4 explains the meaning of window utilization, and how the 0.4 factor came about. It also deals with different types of magnet wire, skin effect, proximity effect, wire tables and foils.

Chapter 5 Transformer Design Tradeoffs (21 pages)

Chapter 5 explains the power handling capability of a magnetic core for both area product, Ap, and the core geometry, Kg. This chapter also shows the relationship the area product has with volume, weight, surface area and current density for a given temperature-rise.

Chapter 6 Transformer-Inductor Efficiency, Regulation, and Temperature Rise (11 pages)

Chapter 6 explains transformer regulation and copper loss. There is a curve that shows when the transformer has reached maximum efficiency. There are equations and curves for calculating temperature rise.

Chapter 7 Power Transformer Design (30 pages)

Chapter 7 explains the output power to the apparent power when designing power transformers. It also gives the relationship between core geometry, Kg, and the area product, Ap, for the power-handling capability of a magnetic core. There are two step-by-step design examples using the core geometry, Kg approach.

Chapter 8 DC Inductor Design Using Gapped Core (25 pages)

Chapter 8 provides a design procedure for gapped inductors using the step-by-step procedure. It also gives the critical inductance equations for both sine wave and square wave. The fringing flux factor is calculated and used in the designs. There are two step-by-step design examples using the core geometry, Kg, approach and the area product Ap approach.

Chapter 9 DC Inductor Design Using Powder Core (19 pages)

Chapter 9 provides a design procedure for powder core inductors using the step-by-step procedure. It also gives the relationship between core geometry, Kg, and the area product, Ap for the energy handling capability of a magnetic core. There are two step-by-step design examples using the core geometry Kg approach and the area product Ap approach.

Chapter 10 AC Inductor Design (19 pages)

Chapter 10 provides a design procedure for AC inductors using the step-by-step procedure. It also gives the relationship between core geometry, Kg, and the area product, Ap, for the VA capability of a magnetic core. The fringing flux factor is calculated and used in the designs. There are two step-by-step design examples using the core geometry, Kg approach and the area product, Ap approach.

Chapter 11 Constant Voltage Transformer (CVT) (20 pages)

Chapter 11 provides equations to design a two-component, ferroresonant transformer regulator using a step-by-step procedure. Also provided are the expected waveforms. There is a step-by-step design example for both the series inductor and power transformer using the area product, Ap approach.

Chapter 12 Three Phase Transformer Design (18 pages)

Chapter 12 provides equations and procedures for designing three phase transformers, either star or delta. There is also information on phase current, phase voltage and multiphase rectifier circuits. There is a step-by-step design example using the core geometry, Kg approach.

Chapter 13 Flyback Converter Transformer Design (46 pages)

Chapter 13 provides equations and design procedures for continuous and discontinuous, flyback converter magnetics. There are design equations for buck, boost, inverted buck-boost and the isolated buck-boost converters. There are three step-by-step flyback converter design examples and one power factor correction design, using the core geometry, Kg approach.

Chapter 14 Forward Converter Transformer Design and Output Inductor Design (25 pages)

Chapter 14 provides circuit operation for both the single-ended and the dual transistor converters. The operational B-H loop for the forward converter is compared with the standard push-pull converter. There is a design example for the forward converter and a design example for the output inductor, both using the Kg approach.

Chapter 15 Input Filter Design (17 pages)

Chapter 15 provides equations and design procedures for typical inductor input filter. There are performance waveforms that show the response of the filter for a step input. There is a design example for the input inductor using the Kg approach.

Chapter 16 Current Transformer Design (13 pages)

Chapter 16 provides the performance characteristics of a current transformer. Also there are circuits on how current transformers can be used. There is also a step-by-step design example.

Chapter 17 Winding Capacitance and Leakage Inductance (14 pages)

Chapter 17 shows how the winding capacitance and leakage inductance, affects converter performance. There are test methods for measuring leakage inductance and lumped capacitance. There are also methods on how to reduce leakage inductance and winding capacitance.

Chapter 18 Quiet Converter Design (26 pages)

Chapter 18 The quiet converter is a current-fed sine wave converter. Its performance is compared with other types of PWM converters to show its merits. Typical waveforms are presented to the performance of the quiet converter. There is a design example for the quiet converter using the Kg approach.

Chapter 19 Rotary Transformer Design (10 pages)

Chapter 19 provides information regarding the two types of rotary transformers, axial and the flat plane. There are also outline drawings of both types and a discussion of the design constraints.

Chapter 20 Planar Transformers (19 pages)

Chapter 20 provides information for designing planar transformers. There are drawings showing the fabrication technique used in planar transformers. There is information on the latest commercially available planar cores. Also there are tables that provide information on printed circuit trace data for calculating trace resistance and capacitance.

Chapter 21 Derivation for the Design Equations (18 pages)

Chapter 21 gives the mathematical derivation for, output power, Po, versus apparent power, Pt, core geometry, Kg for transformers, area product, Ap, for transformers, core geometry, Kg, for inductors, area product, Ap, for inductors and transformer regulation.