CONTROL GEAR FOR INDUCTION-MOTOR DRIVE Russian patent published in 2004 - IPC

FIELD: electrical engineering; variable-speed drives for rail-guided transport. SUBSTANCE: control gear that can be used, for instance, to drive rail-guided vehicles has first control circuit for motor speed governing and motor-connected second control circuit incorporating clutch regulator; control characteristic is improved due to using motor control gear in the form of its stator frequency regulator, actual value of torque M_ist being set up within induction motor control range; both control circuits are interconnected as actual value of torque M_ist controlled within specified range is used as actual value for clutch regulator; the latter specifies desired value of stator frequency f_s,soll for motor speed governing. EFFECT: improved dynamic properties, enhanced damping of mechanical vibrations, reduced control time, facilitated in-service starting. 7 cl, 11 dwg