THREE-PHASE INVERTER Russian patent published in 2019 - IPC H02M7/53 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used in autonomous power supply systems for conversion of direct current into a three-phase symmetric system of alternating current voltages. Three-phase inverter comprises DC voltage source (15), single-phase self-contained inverters (10 and 11), transformer with rotating magnetic field (1), containing primary (2–5) and secondary windings (6, 7, 8), input filter (16), control system (17) consisting of sawtooth voltage generator (18), phase-shifting device (20), transformer-rectifier unit (21), first (24) and second (25) pulse former, first (22) and second (23) pulse distributors, according to the invention, the control system comprises high-frequency generator (19).

EFFECT: use of a high-frequency generator which generates a pulse-width modulation signal at frequency of 4–5 kHz in the control circuit, thereby reducing heat generation by transistor switches and increasing efficiency by 3–5 %.

1 cl, 3 dwg