ROLLING MILL DRIVE Russian patent published in 2014 - IPC H02P7/14 H02P7/285 

FIELD: electricity.

SUBSTANCE: electric drive of a roll mill includes angular velocity setter (1) of independent-excitation DC motor (13), scaling amplifier (2), two comparator elements (3, 4), two nonlinear functional converters (5, 6) performing functions listed in the invention, controller switch element (7), limiting unit (8), speed and current controllers (9, 10), power amplifier (11), current and voltage sensors (12, 14), motor angular velocity and rolling speed sensors (15, 16); result is achieved by damping of oscillation caused by nonlinear dependency of rolling momentum from angular velocity of electric drive, and operating point shift in the electric drive to stable operation zone, which is performed by connection of constant signal U₀ to input signal of current controller at critical angular velocity of motor rotation when oscillation evolves, in order to ensure controlled speed change and respective shift of operating point to stable zone.

EFFECT: improved quality of speed regulation in electric drive.

3 dwg