The paper deals with analysis and modelling of a new type of single-phase supplied AC/AC converter with two phase outputs. It consists of one-leg half-bridge matrix converter loaded by the resistive-inductive load in series connection. As harmonic analysis of the voltage of both phases gives very high value of total harmonic distortion (roughly 86 %) the current waveforms should be improved by using of serial L-C filter -which brings much lesser value acceptable for application. The simulation is resulting in a recommendation for the fair and right design of the converter, and demands to single-or two-phase input supply voltage, respectively, under passive R-L or motoric load.

No abstract

No abstract

Paper deals with mathematical modelling of impulse waveforms and impulse switching functions used in electrical engineering. Impulse rectangular waveforms are created by periodical trigonometric functions with modulo π, so, the waveforms are discontinuous and strongly non-harmonic ones. Impulse switching functions are investigated using direct-and inverse z-transformation. The results make it possible to present those functions as infinite series expressed in pure numerical-, exponential-or trigonometric forms. Theoretical derived waveforms are compared with simulation worked-out results.

This paper deals with mathematical modelling of impulse waveforms and impulse switching functions used in electrical engineering. Impulse switching functions are later investigated using direct and inverse z-transformation. The results make possible to present those functions as infinite series expressed in pure numerical, exponential or trigonometric forms. The main advantage of used approach is the possibility to calculate investigated variables directly in any instant of time; dynamic state can be solved with the step of sequences (T/6, T/12) that means very fast. Theoretically derived waveforms are compared with simulation worked-out results as well as results of circuit emulator LT spice which are given in the paper.