DEVICE FOR AUTOMATIC CONTROL OF SPEED, TRACTION FORCES AND ELECTRIC BRAKES OF MULTIPLE-UNIT ELECTRIC LOCOMOTIVE Russian patent published in 1997 - IPC

FIELD: electrified railways; multiple- unit DC electric locomotives with automatically controlled separately excited traction motors. SUBSTANCE: driving and each driven units of locomotive have speed governor, multiplying unit, minimum signal discrimination unit, signal intensity setter, traction motor armature current regulator, field voltage converter, field and armature currents pickups, signal nonlinear transformation unit. Driving unit has also speed setter and traction and electric brake force setter coupled also with driven units with summing up amplifiers installed additionally on driven units. All units have also one lag filter providing quick transient process according to field current when processing disturbances in armature current control circuit. Signal nonlinear transformation units are used, as distinct from known devices, not in feedbacks but in traction motor armature current setting signal shaping circuits. EFFECT: enlarged operating capabilities. 1 dwg