DIGITAL MODULATOR FOR FREQUENCY CONVERTER Russian patent published in 2021 - IPC H03K7/08 

FIELD: pulse technology.

SUBSTANCE: invention relates to the field of pulse technology and can be used in frequency converters to control AC motors. The digital modulator for the frequency converter contains generators 1 and 2 of rectangular pulses, counters 3, 4, 5 and 6, triggers 7, 8 and 9, elements 10 and 11 OR, element 12 EXCLUSIVE OR, element 13 AND, elements 14, 15, 16 , 17, 18, 19 and 20 NO-AND, decoders 21, 22 and 23, pulse shapers 24 and 25, adder 26, registers 27, 28, 29 and 30, binary-six counter 31, reset circuit 32, output buses 33 , 34, 35, 36, 37, 38, 39, 40, 41 and 42, a frequency setting signal line 43, a first voltage setting signal line 44, a second voltage setting signal line 45, a rotation direction signal line 46, and a synchronization signal line 47.

EFFECT: reduction of the amplitudes of higher harmonics in the output voltage of the frequency converter.

1 cl, 4 dwg, 1 tbl