高力率準正弦波入力電流制御整流装置

概要

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As a ideal AC-DC converter, it is required to satisfy the next conditions. 1) Output DC voltage is able to change continuously. 2) Regardless of the output voltage, the fundamental wave power factor is always unity. 3) Input AC current is always sinusoidal. 4) Consequently the apparent power factor is high as much as possible. In DC output sides of two three-phase diode-bridges which differ phase by 30°, a interphase transformer with two taps to which connect a diode respectively, is applyed. Operating as the rectifier, input AC current is quasi-sinusoidal wave with 24 steps, and the fundamental wave power factor is unity. As the residual higher harmonics are only slight, the apparent power factor is very high. By a cascade connection of DC chopper, the output DC voltage is variable by changing continuously the control factor. The main feature of this apparatus is the fact that it is constituted with only diodes, except the chopper. The theory and the experimental results are described.
山梨大学の論文