THREE-PHASE AC-TO-DC VOLTAGE TRANSDUCER (VERSIONS) Russian patent published in 2015 - IPC H02M7/00 H02M7/06 H01F30/12 

FIELD: electricity.

SUBSTANCE: three-pulse transducer comprises three-phase transformer and the main group of wye-connected secondary phase windings. Each phase winding together with two auxiliary phase windings of opposite sign and choke form the three-phase serial zigzag branching, which is coupled to the total load. Sum of number of turns in inner and outer zigzag branches is equal to number of turns in the main group. nine-pulse transducers are featured by: availability of additional and auxiliary groups of windings and chokes coupled in the similar way to intermediate outputs in the first group of windings with ratio of turn number corresponding to all types of magnetic core magnetizing; number of auxiliary groups of windings is twice less and their functions are combined as related to a part of phase windings in the first group between its neutral line and intermediate outputs due to respective increase in number of turns for the above phase windings; number of additional and auxiliary groups of windings is twice less due to their connection to intermediate outputs in the first group of windings through chokes to zigzag; the most cost-effective nine-pulse transducer; quantity of three-phase serial zigzag branches is less per one group of windings; availability of two identical secondary windings, each of them is wye-connected, and the intermediate and outermost outputs are interconnected to zigzag through choke and one auxiliary phase winding; availability of one wye-connected secondary winding with open neutral line, which outputs are connected to input leads of three-phase choke bridge, the first intermediate and outermost outputs of phase windings with different sign are connected to zigzag through controlled choke and two (one) auxiliary phase windings while the second intermediate outputs are connected only through controlled choke. Back-to-back connection of chokes may be performed.

EFFECT: all types of the transformer magnetizing are unavailable.

10 cl, 9 dwg