FIELD: engines.
SUBSTANCE: group of inventions relates to devices or methods of controlling AC motors. Method of electric AC differential (ED) pulse control includes stator windings of two asynchronous motors assembled in common triangle. By means of limit switches, two braking starters and contacts two stator windings switched in phases of voltage source, which leads to change in direction of rotation of magnetic field of that motor. Duration of windings switching cycle is controlled by means of relay. Device for pulse control of ED comprises two asynchronous motors, stator windings of which are connected in series in common triangle by four pairs of magnetic starters.
EFFECT: technical result consists in providing efficiency and wider range of rotation frequency control.
2 cl, 2 dwg
