1、1 译 文 原文题目： Newnes Electrical Engineers Handbook 译文题目： 纽恩斯电气工程师手册节选 学 院： 电子信息学院 专业班级： 电气工程及其自动化 2008 级 04 班 学生姓名： 张 学 号： 408030404 西安工程大学 本科 毕业设计（译文） 1 Newnes Electrical Engineers Handbook D.F. Warne Chapter 1 Introduction There seems to be a trend in the public perception of engineering and technol
2、ogy that to be able to operate a piece of equipment or a system is to understand how it works. Nothing could be further from the truth. The gap between the ability to operate and a genuine understanding is, if anything, widening because much of the complexity added to modem electrical equipment has
3、the specific aim of making it operable or user-friendly without special training or knowledge. The need for a basic explanation of principles, leading to a simple description of how various important and common classes of electrical equipment works , has never been stronger. Perhaps more so than in
4、its predecessor, Newnes Electrical Pucker Book, an attempt is made to address fundamentals in this book, and the reader is encouraged to follow through any areas of interest using the references at the end of each chapter. More comprehensive coverage of all the subjects covered in this pocket book i
5、s available in the Newnes Electrical Engineers Reference Book. More so now than ever before, the specification and performance of electrical equipment is governed by national and international standards. While it would be inappropriate in a pocket book to cover standards in any detail, a summary of
6、key standards is included for reference purposes at the end of each chapter. The need for a basic explanation of principles, leading to a simple description of how various important and common classes of electrical equipment works, has never been stronger. Perhaps more so than in its predecessor, Ne
7、wnes Electrical Pucker Book, an attempt is made to address fundamentals in this book, and the reader is encouraged to follow through any areas of interest using the references at the end of each chapter. More comprehensive coverage of all the subjects covered in this pocket book is available in the
8、Newnes Electrical Engineers Reference Book. More so now than ever before, the specification and performance of electrical equipment is governed by national and international standards. While it would be 西安工程大学 本科 毕业设计（译文） 2 inappropriate in a pocket book to cover standards in any detail, a summary o
9、f key standards is included for reference purposes at the end of each chapter. The structure of the book is based around three groups of chapters, which address: fundamentals and general material the design and operation of the main classes of electrical equipment special technologies which apply to
10、 a range of equipment The first group comprises three chapters which set out fundamentals and principles running through all aspects of electrical technology.The opening chapter deals with fundamentals of electric and magnetic fields and circuits, with energy and power conversion principles. This is
11、 followed by a review of the materials that are so crucial to the design of electrical equipment, and these are grouped into sections on magnetic, insulating and conducting materials. In each of these areas technology is moving ahead rapidly. The great increases in the strength of permanent magnets
12、in the past ten years has done much to make possible the miniaturization of equipment such as the Sony Walkman and the introduction of so many small motors and actuators in our homes and motorcars. Developments in insulating mataids mean that increased reliability and operation at higher temperature
13、s can now readily be achieved. Under the heading of conductors there are continuing advances in superconductors, which are now able to operate in liquid nitrogen, and of course semiconductor development has transformed the way in which equipment can be controlled and the processing power in computer
14、s. Finally in this opening group there is a chapter on measurement and instrumentation. A classical textbook on electrical measurement would in the past have included sections on moving iron and moving coil instruments, but these have been omitted here in favour of the oscilloscope and sensors which now dominate measurements in most areas. The following group of nine chapters make up the main core of the book and cover the essential groups of electrical equipment found today in commerce and industry. The opening five chapters here cover generators, transformers, switchgear, fuses
