# Basic ac theory

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• ### Lessons In Electric Circuits, Volume II – AC

Most students of electricity begin their study with what is known as direct current (DC), which is electricity °owing in a constant direction, and/or possessing a voltage with constant polarity. DC is the kind of electricity made by a battery (with de¯nite positive and negative terminals), or the kind of charge generated by rubbing certain types of materials against each other. As useful and as easy to understand as DC is, it is not the only \kind" of electricity in use.

• ### Direct torque control

Direct torque control - or DTC - is the most advanced AC drive technology developed by any manufacturer in the world. The purpose of this technical guide is to explain what is; why and how it has evolved; the basic theory behind its.

• ### Practical Troubleshooting of Electrical Equipment and Control Circuits

There is a large gap between the theory of electron flow, magnetic fields and that of troubleshooting electrical equipment and control circuits in the plant. In this book, we try to avoid or at least minimize discussions on the theory and instead focus on showing you how to troubleshoot electrical equipment and control circuits. The book helps to increase your knowledge and skills in improving equipment productivity whilst reducing maintenance costs. Reading this book will help you identify, prevent and fix common electrical equipment and control circuits.

• ### Introduction to Electric Circuits

An Introduction to Electric Circuits is essential reading for first year students of electronics and electrical engineering who need to get to grips quickly with the basic theory. This text is a comprehensive introduction to the topic and, assuming virtually no knowledge, it keeps the mathematical content to a minimum. As with other textbooks in the series, the format of this book enables the student to work at their own pace. It includes numerous worked examples throughout the text and graded exercises, with answers, at the end of each section....