دانلود رایگان کتاب (Switching Power Supply Design (Abraham I. Pressman
کتاب طراحی منبع تغذیه سوئیچینگ پرسمن (ویرایش سوم):
Switching Power Supply Design
Third Edition
Abraham I. Pressman
Preface
Not many technical books continue to be in high demand well beyond the natural life of their author. It speaks well to the excellent work done by Abraham Pressman that his book on switching power supply design, first published in 1977, still enjoys brisk sales some eight years after his demise at the age of 86. He leaves us a valuable legacy, well proven by the test of time. Abraham had been active in the electronics industry for nearly six decades. For 15 years, up to the age of 83, Abraham had presented a training course on switching design. I was privileged to know Abraham and collaborate with him on various projects in his later years. Abe would tell his students that my book was the second best book on switching power supplies (not true, but rare and valuable praise indeed from the old master).
When I started designing switching power supplies in the 1960s, very little information on the subject was available. It was a new technology, and the few companies and engineers specializing in this area were not about to tell the rest of world what they were doing. When I found Abraham’s book, a veil of secrecy was drawn away, shedding light on this new technology.With the insight provided by Abe, I moved forward with great strides. When, in 2000, Abe found he was no longer able to continue with his training course, I was proud that he asked me to take over his course notes with a view to continuing his presentation. I found the volume of information to be daunting, however, and too much for me to present in four days, although he had done so for many years.
Furthermore, I felt that the notes and overhead slides had deteriorated too much to be easily readable. I simplified the presentation and converted it to PowerPoint on my laptop, and I first presented the modified, three-day course in Boston in November 2001. There were only two students (most companies had cut back their training budget), but this poor turnout was more than compensated for by the attendance of Abraham and his wife Anne. Abe was very frail by then, and I was so pleased that he lived to see his legacy living on, albeit in a very different form. I think he was a bit bemused by the dynamic multimedia presentation, as I leisurely controlled it from my laptop. I never found out what he really thought about it, but Anne waved a finger and said, “Abe would stand at the blackboard with a pointer to do that!”
WhenMcGraw-Hill askedmeto co-author the third edition of Abe’s book, I was pleased to agree, as I believe he would have wanted me to do that. In the eight years since the publication of the second edition, there have been many advances in the technology and vast improvements in the performance of essential components. This has altered many of the limitations that Abe mentions, so this was a good time to make adjustments and add some new work. As I reviewed the second edition, a comment made by an English gardener standing outside his cottage in a country village unchanged for hundreds of years, came to mind. In response to a new arrival, a young yuppie who wanted to modernize things, he said, “Look around you lad, there’s notmuchwrong wi’it, is there?” This comment could well be applied to Abe’s previous edition. For this reason, I decided not to change Abe’s well-proven treatise, except where technology has overtaken his previous work. His pragmatic approach, dealing with each topology as an independent entity, may not be in the modern idiom as taught by today’s experts, but for the ab initio engineer trying to understand the bewildering array of possible topologies, as well as for the more experienced engineer, it is a well-proven and effective method. The state-space averaging models, canonical models, the bilateral inversion techniques, or duality principles so valuable to modern experts in this field were not for Abraham. His book provides a solid underpinning of the fundamentals, explaining not only how but also why we do things. There is time enough later to learn the more modern concepts from some of the excellent specialist books now available (see the bibliography).
Abe’s original manuscript was handwritten and painstakingly typed out by his wife Anne over several years. For this third edition, McGraw-Hill converted the manuscript to digital files for ease of editing. This made it easier for Taylor Morey and me to make minor and mainly cosmetic changes to the text and many corrections to equations, calculations, and diagrams, some corrupted by the conversion process. We also made adjustments where we felt such changes would help the flow, making it easier for the reader to follow the presentation. These changes are transparent to the reader, and they do not change Abraham’s original intentions. Where new technology and recent improvements in components have changed some of the limitations mentioned in the second edition, you will find my adjusting notes under the heading After Pressman. Where I felt additional explanations were justified, I have inserted a Tip or Note. I have also added new sections to Chapter 7 and Chapter 9, where I felt that recent improvements in design methods would be helpful to the reader and also where improvements in IGBT technology made these devices a useful addition to the more limited range of devices previously favored by Abraham. In this way, the original structure of the second edition remains unchanged, and because the index and cross references still apply, the reader will find favorite sections in the same places. Unfortunately, the page numbers did change, as there was no way to avoid this. Even if you already have a copy of the second edition of Pressman’s book, I am sure that with the improvements and additional sections, you will find the third edition a worthwhile addition to your reference library.You will also findmybook, Switchmode Power Supply Handbook, Second Edition (McGraw-Hill, 1999), a good companion, providing additional information with a somewhat different approach to the subject.
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