THREE-PHASE FREQUENCY MULTIPLIER Russian patent published in 2006 - IPC H02M5/297 

FIELD: frequency changers including transformer-type multipliers.

SUBSTANCE: proposed three-phase frequency multiplier that can be used as current supply for 100- and 200-Hz power consumers incorporates provision for affording leading power factor has three-phase transformer each of whose three legs mounts two pairs of primary windings connected to supply mains through transistors, and output winding. Disposed on each leg of three-phase transformer are two pairs of circuits connected in parallel opposition; each circuit is set up of series-connected winding and transistor which function so that only initial part of sine-wave supply voltage is used. Some pairs of circuits disposed on different legs are star-connected to three input leads and other ones of similar circuits are connected in delta to same leads.

EFFECT: enhanced power characteristics of three-phase frequency multiplier.

1 cl, 2 dwg