Transformer-rectifier apparatus

摘要

A three-phase transformer having a delta-connected primary and two identical secondary windings per phase connected in hexagon, has symmetrical taps on each secondary winding connected to rectifying devices for generating DC energy from a first group of six symmetrical AC voltages at 60 DEG with respect to the virtual neutral for one polarity and from a second group of six symmetrical AC voltages at 60 DEG with respect to the virtual neutral for the other polarity, the first and second groups being at 30 DEG phase shift to one another.