| 摘要 |
PURPOSE:To execute the control for a hydraulic elevator with high precision and improve the service for the elevator operation by installing the second pattern generating means which revolution-controls an electric motor at low speed, correcting the leak quantity of a hydraulic pump and outputs the deceleration/stop speed signals. CONSTITUTION:The detection speed supplied from a speed detector for a cage is converted to the signal corresponding to the cage position quantity by a cage position feedback means, and feedback-operated to the speed signal outputted from the first pattern generating means 41U and 41D. Then, the slow speed signal for correcting the leak quantity of a hydraulic pump which is previously calculated is added with the speed signal supplied from the first pattern generating means 41U and 41D, by the second pattern generating means 46, and also a deceleration signal and stop signal are outputted. |
