ELECTRIC MOTOR DRIVE Russian patent published in 1994 - IPC

FIELD: electrical engineering. SUBSTANCE: invention refers to line synchronous electric motor drives. Drive includes line synchronous electric motor having immobile part manufactured in the form of magnetic circuit with permanent magnets with alternating polarity attached to it, mobile with two armatures, each having main three-phase winding and supplementary three-phase winding containing smaller number of turns as compared with main one and laid in each armature in parallel to main winding, two digital-to-analog converters, two power amplifiers, two adders, numerical program control device, proportional-integral regulator, voltage limiter, inertial link, current-limiting unit, functional converter, two current regulators, two current pickups, position transducer, phase-to-code converter, rectifier, former of movement pulse signals. Coarse control is realized with the aid of winding having bigger number of turns of main armature and accurate control is performed by means of winding with smaller number of turns of supplementary armature of line motor. EFFECT: increased precision of dynamic control thanks to two-channel current control. 10 dwg