Fundamentals of Electrical Machines

The study of the construction of electrical machines, along with the principles and laws on which they operate, gives the knowledge to predict behaviour and characteristics of the machines. This chapter provides some familiarity with the principles and laws that help understand the principle of electric machinery. It discusses all fundamental laws including Ohms law, Biot‐Savart law, Ampere’s law with many solved numerical problems for clear understanding. Faraday’s law states that voltage will be induced across a loop when there is a rate of change of flux. Electric fields are induced by both static charges and changing magnetic fields. Faraday’s law can be stated as a time‐varying magnetic field that gives rise to an electric field. Electric Machines are the electromechanical energy conversion devices used to transform mechanical energy to electrical energy and vice‐versa. The chapter focuses on basic electrical components such as resistance and inductance with numerical examples.