MULTILEVEL ELECTRONIC POWER CONVERTER

The invention relates to a multilevel electronic power converter for n output voltage levels with a positive branch (POS) with a positive DC voltage terminal (1), a negative branch (NEG) with a negative DC voltage terminal (2), and an AC voltage terminal (3) connected to the positive branch (POS) and to the negative branch (NEG); at least two DC bus capacitors (4) interconnected between the positive DC voltage terminal (1) and negative DC voltage terminal (2) and an intermediate DC voltage terminal (5) connected between the two DC bus capacitors (4); at least two first external semiconductors (6) and at least two second external semiconductors (7) with respective antiparallel diodes connected in series, respectively, in the positive (POS) and negative (NEG) branches between the DC voltage terminal (1, 2) and the AC voltage terminal (3); at least one high-current DC capacitor (11) connected between the positive (POS) and negative (NEG) branches, and at least two high-frequency low-current capacitors (12, 13, 14) connected between the positive (POS) and negative (NEG) branches; an internal branch (INT) connected in parallel with each high-current DC capacitor (11) comprising at least two internal semiconductors (9) with antiparallel diodes connected in series between them and to an intermediate terminal (10); at least one intermediate semiconductor (8) formed by two controlled semiconductors with antiparallel diodes and connected in anti-series, connected between the intermediate DC voltage terminal (5) and the intermediate terminal (10).