MULTIPHASE TRANSFORMER-PHASE SHIFTER Russian patent published in 1999 - IPC

FIELD: electrical engineering, tests of electric devices such as electricity meters. SUBSTANCE: toroidal magnetic core of transformer has secondary multiphase winding put on it that is movable relative to immobile toroidal magnetic core with primary three-phase winding. With this in mind worm gearing rigidly coupled to movable toroidal magnetic core is installed and air gap needed for their mutual translation is provided. EFFECT: possibility of control over phase of output voltage in range 0-2π with its value being constant. 3 dwg