Abstract: The invention relates to a 3N?4-level (N?3) voltage converter including: 3N?5 direct voltage generators (1, 2, 3, 4) connected between two input voltage terminals (V+, V?), two lateral commutation branches (10, 11), each connected between an output terminal and an input voltage terminal (V+, V?) and comprising N?1 series connected commutation cells (20, 21, 22, 23), 2N?4 central commutation branches (12, 13), each comprising a switch bidirectional in terms of voltage and current and being connected between two commutation cells of a lateral branch (10, 11) and two generators, and N?2 pairs of diode cells (16) each connected to two of the 2N?4 central commutation branches (12, 13). The diodes (14, 15) of one pair are series connected, in the same direction, and are connected together by a middle point connected between two generators.

Abstract: The invention relates to a 3N?4-level (N?3) voltage converter including: 3N?5 direct voltage generators (1, 2, 3, 4) connected between two input voltage terminals (V+, V?), two lateral commutation branches (10, 11), each connected between an output terminal and an input voltage terminal (V+, V?) and comprising N?1 series connected commutation cells (20, 21, 22, 23), 2N?4 central commutation branches (12, 13), each comprising a switch bidirectional in terms of voltage and current and being connected between two commutation cells of a lateral branch (10, 11) and two generators, and N?2 pairs of diode cells (16) each connected to two of the 2N?4 central commutation branches (12, 13). The diodes (14, 15) of one pair are series connected, in the same direction, and are connected together by a middle point connected between two generators.