THREE-PHASE CURRENT FREQUENCY DOUBLER Russian patent published in 1994 - IPC

FIELD: electrical engineering. SUBSTANCE: device has six single-phase bridge rectifiers built around diodes 1 of which three ones are connected to supply mains line leads and other three, to phase leads, adder assembly made in the form of phase windings each built up of two parts with different number of turns; part 3 of winding having greater number of turns is connected to output of respective rectifier whose input is connected to supply mains line leads; part 2 of winding having smaller number of turns is connected to output of respective rectifier whose input is connected to phase leads of supply mains. Number of turns of respective parts is selected for each phase winding on condition that magnetic fluxes built up by these parts are equal. EFFECT: improved design. 1 dwg