2

DESIGN OF MAGNETIC CIRCUITS

2.1 Introduction

All electrical machines use magnetic materials for directing and shaping the magnetic field, which acts as a medium for energy conversion. While most of the rotating machines use ferromagnetic materials along with air, the transformer uses ferromagnetic materials only as the medium. The magnetic circuit acts as a medium for conversion of electrical to electrical energy in case of transformers, electrical to mechanical energy in case of motors and mechanical to electrical energy in case of generators. Hence, analysis of magnetic circuits is essential for understanding the machines.

Magnetic circuit is defined by the path travelled by magnetic flux. Magnetic flux traces a closed path, returning back ...

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