ALTERNATE CURRENT VARIABLE SPEED DRIVE Russian patent published in 2017 - IPC H02M1/16 H02M7/483 H02M7/487 H02M7/527 H02P27/08 

FIELD: electricity.

SUBSTANCE: junction of the motor stator winding zero point with the zero potential point of the inverter provides the stable operation of the actuating unit with three phase current controllers in such a way that under all conditions the instantaneous currents do not cross the boundaries of the defined current passage. The motor phase current harmonic distortions are the lowest ones regardless of the ratio distortion of the motor phase back-electromotive force.

EFFECT: exclusion of the self-oscillations onset possibility and of the expansibility of the phase currents momentary values deflexions from the predefined ones, reduction of the switching frequency of the controlled semiconductor devices of the inverter to the acceptable level independently of the additional reactors.

3 dwg