Sinusoidal Steady State

Abstract

In many of the engineering devices to be studied in this book, there are time-varying or moving magnetic fluxes. For continuous operation, a time variation must be periodic, and this means usually sinusoidal. Any departure from this ideal waveshape can be, if necessary, taken into account by the principle of the Fourier series. That is, periodic waveshapes must be composed of sinusoids, called fundamentals and harmonics, and the harmonics can be disregarded if they are small enough, or else they can be considered separately.