SCOTT CIRCUIT BASED THREE-PHASE INVERTER Russian patent published in 2018 - IPC H02M7/42 

FIELD: electrical equipment.

SUBSTANCE: invention relates to the field of electrical equipment and can be used in autonomous power supply systems as the sinusoidal voltage source. Inverter contains the constant-voltage source terminals, DC-to-AC converter containing first cell, second cell and the phase shifter providing the phase shift between cell voltages equal to 90 electrical degrees, Scott circuit comprising the first transformer comprising connected to the first cell primary winding, core and having the middle point secondary winding, and the second transformer comprising primary winding, core and secondary winding, wherein the first transformer secondary winding middle point is connected to the second transformer secondary winding beginning, and the balanced load connection terminals, two-phase into three-phase voltage converter, made by the electric asynchronous controlled motor with the locked rotor type containing internal slotted core, in which slots the primary two-phase winding is located, which first phase is the horizontal winding through the tuning capacitor included between the second transformer secondary winding end and the Scott circuit first transformer secondary winding end, and the second phase is the vertical winding placed relative to the first phase at an angle equal to 90 geometric degrees and connected between the first phase winding end and the beginning of the Scott circuit first transformer secondary winding, and external slotted core coaxial to the internal one, in which slots the three-phase secondary winding is arranged, connected to the output terminals for the balanced load connection. Enabling improvement in the inverter output voltage quality by the fact that the two-phase to three-phase voltage converter primary and secondary windings are made with the conductors density distribution linear law along the boring of the cores.

EFFECT: technical result consists in the reduction of the higher harmonics level in the inverter output voltage.

1 cl, 2 dwg