MULTILEVEL POWER CONVERTER Russian patent published in 2018 - IPC H02M7/483 

FIELD: electricity.

SUBSTANCE: invention relates to conversion equipment. Multilevel converter comprises at least one arm (B) formed of n stages (Et1, Et2, …, Etn) mounted in cascade. First stage (Et1) comprises single switching structure (Ce10) with four voltage levels, and ith stage (i lying between 2 and n) comprises i identical switching structures (Cei1, Cei2, …, Ceii) with four voltage levels, mounted in series. Each switching structure with four voltage levels comprises a cell with a floating capacitor, (T1, T2, T1', T2', C12), two basic switching cells (T3u, T3'u; T3I, T3'I) and a capacitive divider bridge (C9, C10, C11), the basic switching cells being connected between the voltage divider bridge and the cell with a floating capacitor.

EFFECT: aim of the present invention is to propose a multi-level converter able to work at voltage levels above those of the prior art, without needing either to resort to transformers or to increase the number of semi-conductor switches placed in series.

10 cl, 6 dwg, 2 tbl