力率を改善し電圧制御を可能とする倍電圧コンバ-タ

概要

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In this paper, a novel version of the dual voltage converter is presented with improved voltage regulation and enabling a wide range of voltage control by using self-turn-off devices (power transistors) instead of diodes. Further, this system operates with unity displacement factor. We have obtained the analytical expressions of this circuits. The results is, however, quite complex. We could calculate values of the voltage and current waveforms by using computer. The calculated values are essentially in agreement with experimental values.Experimentally, an ideal load characteristic with null voltage regulation was obtained by the conduction angle control for power transistors. Further, a wide range of voltage from 220V to 39V was obtained.A disadvantage for this system is the requirement for snubber circuits with a larger value of capacitor in order to suppress the surge voltages at turn-off periodes.
社団法人電気学会の論文