THREE-PHASE TO-THREE-PHASE CONVERTER PROVIDED WITH INCREASED FREQUENCY TRANSFORMER MEMBER Russian patent published in 2004 - IPC

FIELD: frequency converters circuits.

SUBSTANCE: transformer is designed as "modulator connected directly with circuit - increased frequency transformer member - demodulator". Modulator has three groups of three-phase primary windings of transformer. Each winding is wye-connected to output of three-phase diode bridge by means of switching element made in form of transistor switch. Diode bridge has ac terminals connected to like outputs of one of winding groups. The other like outputs of primary windings of unlike phases are connected to one phase of supply line. Demodulator has similar design and is disposed on the secondary side of transformer, but other like outputs of secondary windings of unlike phases are connected to one output of three-phase load. Number of transistor switches on primary and secondary sides of transformer is minimized.

EFFECT: reduced weight and size of transformer.

3 dwg