MULTILEVEL POWER CONVERTER Russian patent published in 2016 - IPC H02M7/483 

FIELD: electricity.

SUBSTANCE: invention relates to power conversion equipment. Invention object is multilevel converter containing one or more arms (B), each of which is connected between source of voltage (VDC) and source of current (I). Each arm consists of two connected in form of cascade stages (E1, E2), wherein first stage (Et1) is intended for connection to voltage source (VDC), and second stage (Et2) is intended for connection to source of current (I). First stage (Et1) comprises n connected in form of a cascade elementary steps (E1n, … E12, E11) with rank from one to n (n is greater than 1), wherein elementary stage (E11) of rank 1 is connected to second stage (Et2), and elementary stage (E1n) of rank n is intended for connection to voltage source (VDC). Each elementary stage (E1n) comprises two series-connected identical cells of NPC type (Cen1, Cen2), wherein connection is straight in elementary stage of rank 1, wherein connection via n-1 capacitive cells (Can(1), Can(n-1)) for each elementary stage of rank n (n is greater than 1), wherein second stage (Et2) contains cell with floating condenser (Ce10).

EFFECT: increased permissible voltage level.

13 cl, 10 dwg, 1 tbl