METHOD OF INVERTING VOLTAGE Russian patent published in 2016 - IPC H02M7/68 

FIELD: physics.

SUBSTANCE: invention relates to converting equipment and can be used in static voltage inverters based on transformer with rotating magnetic field to supply AC power systems, as well as for supply of traction electric drive. One way to increase output voltage and electromagnetic compatibility of static converters quality are transformers with rotary magnetic field, which have spatial symmetry of magnetic system and make it possible to considerably increase number of phases of system owing to use of circular windings with taps or secondary multiphase windings. In case of autonomous inverter based on transformer with rotating magnetic field multi-phase secondary voltage can be obtained by switching primary circular winding taps fed from DC voltage source. At that, alternating voltage is generated in secondary multiphase winding, which frequency is determined by circular winding switching rate, and number of phases of obtained output voltage is determined by spatial shift of winding phases, which enables to obtain more than three phases at outlet without use of triangle, which requires larger number of turns. In disclosed inversion method solves task of smooth regulation of static voltage inverter output voltage based on transformer with rotating magnetic field.

EFFECT: smooth adjustment of output alternate voltage, improved electromagnetic compatibility and high quality of output voltage without considerable increase in number of taps of primary circular windings.

1 cl, 5 dwg