THREE-PHASE FREQUENCY CONVERTER Russian patent published in 2006 - IPC H02M5/458 

FIELD: electrical engineering; off-line power supply systems.

SUBSTANCE: proposed frequency converter that can be used for regulating frequency and voltage of power generators whose drive speed is unsteady has three-phase bridge circuit of uncontrolled rectifier 1, inverter 2 incorporating first and second transistors 3 and 4, respectively, and inverter capacitor 5, inverter control system 6, revolving-field transformer 7 incorporating first and second primary windings 8 and 9, respectively, phase-shifting capacitor 10, and secondary windings 11, 12, and 13, Drawing illustrates leads A1, B1, and C1 for connecting voltage supply at frequency_{f1, and leads A2, B2, and C2 for connecting load at voltage frequency f2.}

EFFECT: enhanced operating reliability of three-phase frequency converter.

1 cl, 1 dwg