5 Conclusion
In electrical circuits we often find non sinusoidal alternating values that are extremely important in transmission and analysis of different signals. Unlike sinusoidal alternating values, they cannot be displayed by using vectors and complex numbers, but only as continuous time (or discrete) functions.
In this paper it is shown that such functions can be, using Fourier transformation, distinguished to DC component and to a series of alternating components (harmonics). Since nowadays the importance of application of Fourier transformation in the analysis of electrical networks is emphasized [11], the introductory chapters of this paper mathematically explain Fourier series and the calculation of its coefficients.
Unlike discrete Fourier transformations [12, 13, 14], in this paper is shown, based on the example of continuous time non sinusoidal functions (square wave signals), the usage of continuous time Fourier transformation. Such transformed signal is possible to analyze by using conventional complex/vector methods and available software for the analysis of electrical networks [15].