| 摘要 |
PURPOSE:To obtain a safe control device of an elevator which can accelerate a car within a scope not generating a slipping of a main rope. CONSTITUTION:A slipping of a sheave 7 and a main rope 10 is detected from the acceleration deflection between the rotation acceleration signal alphab of electric motor and the elevator car acceleration signal alphad output from the first and the second differential circuits 17 and 18 to differentiate a speed signal Pb to be the electric motor rotation speed signal and a speed signal Pd to be the elevator car running speed signal respectively, and a speed instruction generating device 1 is controlled to reduce the acceleration deflection by reducing the acceleration instruction by a comparator 21 and an acceleration instruction generating device 22 to reduce the increase amount of the speed instruction signal to control the electric motor, so as to prevent the generation of the slipping of the main rope. |
