AUTOMATIC PARAMETRIC ELECTRIC DRIVE Russian patent published in 2005 - IPC

FIELD: electrical engineering.

SUBSTANCE: proposed energy conservation electric drive that can be used for rotary boring, measurement of liquid discharges through large-diameter pipelines, and pump delivery regulation in main pipelines has at least one ac squirrel-cage actuating motor incorporating two independent windings of which one is connected in delta and other one, in star; three-phase generator that functions as three-phase power supply coupled with prime mover, such as diesel engine or electric motor; and automation system incorporating rectifier for varying parameters of dc current from control system, its output being connected to leads of three-phase generator inductor windings, as well as comparison device that generates control signal and is connected through its output to rectifier input and through inputs, to controlled variable setting element and sensor installed on controlled entity, such as on motor shaft. Eliminating operating instability zone and enhancing shaft starting torque, as well as extending range of shaft speed variation have made it possible to improve mechanical characteristics of electric drive.

EFFECT: enhanced efficiency and operating reliability, reduced mass and maintenance charges.

7 cl, 4 dwg, 1 tbl