STEPPED AC VOLTAGE STABILIZER Russian patent published in 2018 - IPC G05F1/30 H02M5/12 H02M5/22 H02M5/275 

FIELD: electrical equipment.

SUBSTANCE: invention relates to the electrical equipment, and is intended to supply the enterprises internal power grid electricity consumers with three-phase, as well as single-phase stabilized sinusoidal voltage under conditions of the supply power grid non-compliance with the requirements of GOST 32144-2013. Technical result is achieved by creation of the step-type AC voltage regulator, where transformer is used with number of windings exceeding the number of control steps, at that, one of the windings is the booster and is in series connected with the load. Remaining windings are connected so, that the first winding beginning output was used as the beginning of the windings total assembly, all the windings ends, except the last, are connected to the switching power relay change-over contact, normally closed contacts outputs and the last winding end output are connected, and used as the windings total assembly end, and the relay normally open contacts are connected to all the windings beginnings outputs, except the first, which eliminates the voltages summation on the unused windings and reduces the maximum voltage on the switches with a wide range of control, and also allows to use one transformer.

EFFECT: enabling the wide range of control with increased reliability.

1 cl, 1 dwg