THREE-PHASE INVERTER Russian patent published in 2011 - IPC H02M7/53 

FIELD: electricity.

SUBSTANCE: device comprises inverters and a transformer, besides, it includes a control system, and a power transformer is a single-phase-three-phase transformer with a rotary magnetic field with two primary windings, every of which has a middle point and three secondary windings displaced relative to each other by 120°, connected as delta, outputs of which are outputs of the inverter for connection of a three-phase load, besides, the first input terminal of the three-phase inverter is connected with an emitter-collector transitions of transistors in the first and second single-phase inverters, emitters of the first and second transistors of the first single-phase inverter are connected to the beginning and the end, accordingly, of the first primary winding of the transformer, and emitters of the first and second transistors of the second single-phase inverter with the beginning and the end of, accordingly, the second primary winding of the transformer, the second input terminal of the three-phase inverter is connected to the middle points of the first and second primary windings of the transformer, the control system of the three-phase inverter comprises a sawtooth oscillator, a phase-shifting device, a transformer-rectifier unit, the first and second pulse shapers, the first and second pulse distributors.

EFFECT: increased reliability of the three-phase inverter and reduced level of electric noise.

3 dwg