Ebook Particulars :
Language English
Pages 440
Format PDF
Dimension 12.3 MB

 

Electric Motors and Drives Fundamentals Varieties and Functions Fourth Version by Austin Hughes and Bill Drury


 

PREFACE

This fourth version is once more meant primarily for nonspecialist customers or college students of electrical motors and drives. From the outset the goal has been to bridge the hole between specialist textbooks (that are pitched at a degree which is simply too educational for the typical consumer) and the extra prosaic handbooks that are filled with detailed data however present little alternative for the event of any actual perception. We intend to proceed what has been a profitable method by offering the reader with an understanding of how every motor and drive system works, within the perception that it is just by understanding what ought to occur (and why) that knowledgeable judgements and sound comparisons could be made.

The truth that the guide now has joint authors resulted straight from the writer’s profitable reviewing course of, which canvassed skilled opinions a couple of potential fourth version. It recognized a number of new matters wanted to deliver the work updated, however these areas weren’t ones that the unique creator (AH) was geared up to handle, having lengthy since retired. Happily, one of many reviewers (WD) turned out to be a keen co-author: he isn’t solely an industrialist (and creator) with huge expertise within the area, however, at the least as importantly, shares the philosophy that guided the primary three variations. We get pleasure from collaborating and hope and imagine that our synergy will show of profit to our readers.

On condition that the guide is geared toward readers from a variety of disciplines, sections of the guide are of necessity dedicated to introductory materials. The primary two chapters due to this fact present a mild introduction to electromagnetic vitality conversion and energy electronics. Lots of the primary concepts launched right here crop up often all through the guide (and certainly are intentionally repeated to emphasise their significance), so until the reader is already nicely versed within the fundamentals it will be clever to soak up the primary two chapters earlier than tackling the later materials.

At numerous factors later within the guide we embody extra tutorial materials, e.g. in Chapter 7 the place we put together the bottom for unraveling the mysteries of field-oriented management. A grasp of primary closed-loop ideas can also be required with the intention to perceive the operation of the varied drives, so additional introductory materials is included in Appendix 1. The guide covers the entire most necessary forms of motor and drive, together with standard and brushless d.c., induction motor, synchronous motors of every type, switched reluctance, and stepping motors (however not extremely custom-made or application-specific methods, e.g. digital arduous disk drives). The induction motor and induction motor drives are given most weight, reflecting their dominant market place by way of numbers. Typical d.c. machines are intentionally launched early on, regardless of their declining significance:

 

that is partly as a result of understanding is comparatively straightforward, however primarily as a result of the elemental ideas that emerge carry ahead to different motors. Equally, d.c. drives are tackled first, as a result of expertise reveals that readers who handle to understand the ideas of the d.c. drive will discover this knowhow invaluable in coping with different more difficult varieties. The third version has been utterly revised and up to date.

Main additions embody an in depth (however largely non-mathematical) therapy of each fieldoriented and direct torque management in each induction and synchronous motor drives; a brand new chapter on everlasting magnet brushless machines; new materials coping with self-excited machines, together with wind-power technology; and elevated emphasis all through on the inherent capability {of electrical} machines to behave both as a motor or a generator.

 

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