THREE-PHASE CURRENT RECTIFIER Russian patent published in 2007 - IPC H02M7/155 

FIELD: electrical engineering, applicable for supply of multilevel voltage inverters, as well as multilevel DC voltage converters.

SUBSTANCE: the three-phase current rectifier has two input transformers (T)(1,2) and six single-phase bridge rectifier cells (B)(3-8), each consisting of four uncontrolled rectifiers, the outputs of the single-phase bridge rectifier cells are series-connected, and the input transformers are made three-phase ones and their inputs are parallel-connected to one another, the primary windings of the first transformer T(1) are star-connected, and the primary windings of the second transformer (T)(2) are triangle - connected, the second transformer T(2) is so made that its transformation ratio exceeds the transformation ratio of the first transformer T(1) by times.

EFFECT: enhanced quality of the levels of rectified voltage.

2 cl, 6 dwg