초록 ▼

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°with respect

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°with respect to the virtual neutral for one polarity and from a second group of six symmetrical AC voltages at 60°with respect to the virtual neutral for the other polarity, the first and second groups being at 30°phase shift to one another.

대표청구항 ▼

In a system for converting three-phase alternating current (AC) power into direct current (DC) derived between a positive and a negative DC output terminal, the combination of: a transformer having, (1) three primary windings connected to the respective phases of said AC power; (2) six identical sec

In a system for converting three-phase alternating current (AC) power into direct current (DC) derived between a positive and a negative DC output terminal, the combination of: a transformer having, (1) three primary windings connected to the respective phases of said AC power; (2) six identical secondary windings connected into a closed regular hexagon, with two secondary windings for one primary winding; (3) a total of twelve taps on said secondary windings distributed at substantially identical central angles on said regular hexagon, with a pair of taps for each secondary winding; a rectifier circuit having twelve rectifier devices operatively connected in two groups, one positive group to the positive DC output terminal and one negative group to the negative DC output terminal; with one tap of each pair of taps of a winding being associated with one rectifier of one group, the other tap being associated with a rectifier of the other group.