VALVE-TYPE AC MACHINE Russian patent published in 2000 - IPC

FIELD: electric drive systems. SUBSTANCE: machine has rotor, stator with star-connected three-phase winding connected to output of bridge inverter incorporating circuits set up of transistors of different polarity, as well as three-phase control winding that functions to control inverter transistors. In addition, it has three-phase synchronizing winding and one more three-phase control winding, booster transformer with three secondary windings, and half- bridge stage built around transistors, its power circuit being connected in parallel with inverter; this stage is controlled by master oscillator; control winding of booster transformer is connected between center tap of half- bridge stage and that of DC voltage supply. Output voltages of inverter are synchronized during machine starting and in the course of its full-load running; provision is made for high-precision setting of phase shift between output voltages of inverter. EFFECT: improved operating reliability of machine. 6 dwg