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Novel 18-step diode rectifier circuit with nonisolated phase shifting transformers

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2 Author(s)
Oguchi, K. ; Dept. of Electr. & Electron. Eng., Ibaraki Univ., Hitachi, Japan ; Yamada, T.

A novel, economical three-phase AC/DC interface having no controllable switching devices is proposed. The key concept is the combined use of nonisolated phase-shifting transformers and DC-side interphase reactors having tapping diodes. The resultant AC input currents take the form of 18-step waveforms having a total harmonic distortion (THD) of 10.1%, which is roughly two thirds that of 12-step waveforms

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:144 ,  Issue: 1 )