DEVICE FOR FREQUENCY CONTROL OVER ASYNCHRONOUS ELECTRIC DRIVE Russian patent published in 2018 - IPC H02P25/02 H02P25/62 H02P27/06 

FIELD: electrical equipment.

SUBSTANCE: invention relates to the field of electrical equipment and can be used in the frequency-controlled electric drives. When using the automated electric drives with the AC motors frequency control without speed sensors, arising the speed maintaining issues. This issue becomes especially important with the moment loads. Into the induction motor control device the first order inertial link with variable static gain and variable time constant and two static nonlinear converters are introduced. Static nonlinear converters form the static gain and the time constant values required for the given rotation speed in the entire operating range of speed.

EFFECT: ensuring the of the corrective positive feedback by the stator current efficiency in the range of the electric drive speeds of not less than 1:100 at the rated load and while maintaining the asynchronous electric drive control system stability.

1 cl, 2 dwg, 1 tbl