DEVICE FOR FREQUENCY CONTROL OVER ASYNCHRONOUS ELECTRIC DRIVE Russian patent published in 2016 - IPC H02P23/02 H02P25/02 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, namely to frequency-controlled electric drives. Asynchronous motor control device comprises a converter of frequency and voltage, control inputs of which are connected to outputs of the first and second adders, respectively. First input of the second adder is connected to the output of the functional converter, and the second input - to the output of the static converter. First input of the first adder is connected to the source of setting signal and the input of the functional converter, and the second input - to the output of the first static non-linear converter. Outputs of motor stator winding current transducers are connected to the first and the second inputs of the functional current converter, the first output of the functional current converter corresponding to the positive feedback by current of the stator is connected to the input of an aperiodic link of the first order, the output of which is connected to the input of the static converter and to the input of the first static non-linear converter.

EFFECT: technical result is providing efficiency of correcting the positive feedback by active component of the stator current while maintaining stability of the system for control over the asynchronous electric drive.

1 cl, 9 dwg