DEVICE TO STABILISE ROTATION FREQUENCY OF SINGLE-PHASED COMMUTATOR MOTOR Russian patent published in 2013 - IPC H02P1/16 G01R31/00 G01R31/34 

FIELD: electrical engineering.

SUBSTANCE: fixed number of pulses equal to three is set in each period of rectified feed voltage. Pulse width values of the outermost pulses for rectified feed voltage are also set as constant and equal values so that at zero value of the medium pulse with the valid value for output voltage of pulse-width converter is equal to the motor breakaway voltage. Width of medium pulse is a controlled value and it depends on feedback signal, i.e. on fall time of self-induction voltage of the motor till zero.

EFFECT: improvement of energy indicators for electric drive.

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