SYNCHRONOUS-COPHASED ELECTRIC DRIVE Russian patent published in 2013 - IPC H02P5/00 H02P5/46 H02P6/06 

FIELD: electrical engineering.

SUBSTANCE: device includes electric motor with pulse transducer unit installed at its shaft; frequency and phase discriminator; corrector; static converter; phase error determining unit; extra pulse shaper; mixer; frequency setting unit; new - two comparators, AND circuit, numerical key, frequency error determining unit and D-trigger introduced into the device. Frequency error determining unit is made as high-frequency pulse generator, pulse counter, univibrator, D-trigger, register and RS-trigger which input S is joined with synchronous input of D-trigger; input R is the second output of frequency error determining unit, true output is connected to input D of D-trigger which output is connected through univibrator simultaneously to its own input R to input R of pulse counter and synchronous input of the register which outputs are outputs of the frequency error determining unit and inputs D are connected to outputs of the pulse counter which synchronous input is output of the high-frequency pulse generator and in pursuance of the invention it allows phase correction till the preset rotation frequency is obtained at additional angular rate resulting in its turn in twice reduction of maximum time for frequency correction of the electric drive.

EFFECT: increase of electric drive operation speed at transfer to synchronous-cophased mode of operation.

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