THREE-PHASE FREQUENCY CONVERTER Russian patent published in 2012 - IPC H02M5/297 

FIELD: electricity.

SUBSTANCE: circuit of a three-phase frequency converter comprises a source of setting signals (1), a generator of a correction signal (2), a generator of a linearly varying signal (3), a summator (4), the first to third comparators (5-7), the first to third inverters (8-10), a driver (11), a unit of power keys (12), a unit of three-phase load (13). Due to introduction of a summator, direct connection of setting signals source outputs with the first inputs of comparators and addition of the linearly varying signal with the correction signal, a frequency converter preserved ability of operation with high power indices on the background of its circuit simplification and reduction of nine elements.

EFFECT: simplified circuit and reduction of elements number with preservation of minimum capacity of losses in the load.

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