By W.G. Hurley, W. H. Wölfle
In accordance with the basics of electromagnetics, this transparent and concise textual content explains easy and utilized rules of transformer and inductor layout for energy digital purposes. It information either the idea and perform of inductors and transformers hired to clear out currents, shop electromagnetic strength, offer actual isolation among circuits, and practice stepping up and down of DC and AC voltages.
The authors current a wide diversity of functions from smooth strength conversion structures. they supply rigorous layout directions in response to a strong technique for inductor and transformer layout. they give genuine layout examples, educated by way of confirmed and dealing box examples.
Key positive factors comprise:
emphasis on excessive frequency layout, together with optimisation of the winding structure and remedy of non-sinusoidal waveforms
a bankruptcy on planar magnetic with analytical versions and outlines of the processing technologies
analysis of the position of variable inductors, and their functions for energy issue correction and sun power
unique assurance at the measurements of inductance and transformer capacitance, in addition to checks for middle losses at excessive frequency
Covering the fundamentals of the magnetic parts of energy digital converters, this publication is a complete reference for college students engineers facing specialized inductor and transformer layout. it really is particularly beneficial for senior undergraduate and graduate scholars in electric engineering and electricity platforms, and engineers operating with strength provides and effort conversion platforms who are looking to replace their wisdom on a box that has stepped forward significantly lately.
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Extra resources for Transformers and Inductors for Power Electronics: Theory, Design and Applications
14 Minor B-H loops in a ferromagnetic material. Complex permeability is often used to describe both the ferromagnetic effect and the attendant core loss in inductor design. It is particularly useful to describe high-frequency effects in magnetic cores, and we will return to this topic in Chapter 7. 6 Magnetic Materials for Power Electronics The magnetic materials used in power electronics applications can be classified into soft magnetic materials and hard magnetic materials, the main criteria for classification being the width and slope of the hysteresis loop.
These alloys are mainly found in current transformers, audio transformers and magnetic amplifiers. Increasingly, they are being used in power electronics applications up to 20 kHz. They also exhibit very low levels of magnetostriction, making them suitable for thin film applications. The cores are often encased in non-metallic enclosures to protect the material against winding stresses. Powder Core A magnetic powder core is manufactured by having iron or iron alloy powder mixed or glued with an insulation material and compressed into a ring or toroidal form.
Introduction 19 Amorphous Alloys The chemical composition of amorphous alloys contains two types of elements: ferromagnetic elements (Fe, Ni, Co and their combinations) generate the magnetic properties, while metallic elements Si, B and carbon (C) are introduced to decrease the melting point of the alloy to aid the manufacturing process. The resulting structure is similar to that of glass, and these alloys are often called metallic glass. 6 mVm, which is three times of silicon steel, but several orders of magnitude lower than ferrites.