MULTIBLOCK THREE-PHASE FREQUENCY CONVERTER Russian patent published in 2020 - IPC H02M5/42 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and is used in powerful power supply sources. Converter contains in each phase in-series connected N (N = 1, 2...) rectifier-inverter units 3–5, which are connected by inputs to 3 N secondary windings 2 of the transformer. Units 3–5 are supplied from windings 2, having phase shift of voltage vectors equal to 60/N electric degrees.

EFFECT: new is that N units of the second phase (B) are supplied from windings 2 of transformer, having phase shift equal to 20/N electric degrees, relative to first phase (A), and in third phase (C) with shift of 40/N electric degrees.

1 cl, 1 dwg