A Method for Harmonic Analysis of Cycloconverters

Harmonic analysis of direct ac-to-ac frequency converters has been discussed in a few publications. A method of applying Fourier analysis and Boolean techniques to predict the harmonic content of the input and output currents of cycloconverters is described. The method is used to analyze an idealized threephase to single-phase frequency converter whose output frequency fo is a multiple or nonmultiple of the input frequency fi. The results obtained by this method are essential for the design of input filters and in determining amplitudes of subharmonics and beat frequencies with various cycloconverters.