INTRODUCTION

The operation of all electrical machines such as DC machines, transformers, synchronous machines, and induction motors rely upon their magnetic circuits. The closed path followed by the magnetic lines of force is called a magnetic circuit. The operation of all the electrical devices (e.g., transformers, generators, motors, etc.) depends upon the magnetism produced by their magnetic circuits. Therefore, to obtain the required characteristics of these devices, their magnetic circuits have to be designed carefully. In this chapter, we shall focus our attention on the basic fundamentals of magnetic circuits and their solution.