| 摘要 |
PURPOSE:To reduce the harmonic wave of an AC side current and a pulsation of a DC side voltage by providing a plurality of taps at an interphase reactor for connecting between polyphase rectifiers and connecting the taps through separate rectifiers to a DC circuit. CONSTITUTION:A rectifier 1 having thyristors T1-T6 as rectifier elements is connected to one secondary windings 2 coupled in a star connection of a transformer. A rectifier 3 having thyristors T7-T12 as rectifier elements is connected to other secondary windings 4 coupled in a delta connection of the transformer. The rectifiers 1, 3 are connected through the terminals A1, A1' of correlation reactor 5a. Taps P, Q, A0, Q', P' provided at the reactor 5a are respectively connected via rectifier elements TP, TQ, TA0, TQ', TP' of thyristors to a terminal D, which supplies a DC voltage to a load 7 connected through a reactor 6. In this manner, the harmonic wave current of the AC input current is can be reduced, and the pulsation of the DC output voltage ed can be reduced.
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