| 摘要 |
PROBLEM TO BE SOLVED: To solve problems in maintenance to realize a stable travel control of an elevator by providing a counterweight-speed estimating means for estimating the speed of a counterweight from the speed of a car in a car-speed feedback control system. SOLUTION: A speed detector 11 can make check easily in any positions of a car from above the car 1, since it is provided on the car 1. Further, a counterweight-speed estimating means 110 estimates the speed of a counterweight 2 from a car speed signal 11a detected by the speed detector 11, and estimates the speed of a linear motor incorporated in the counterweight 2. Thus, just as the speed detector 11 is provided on the counterweight 2, a stable speed control is realized. Further, an invert function-calculation device of the counterweight-speed detector 11 calculates the speed of the counterweight by multiplying by a detected car speed signal 11a to estimate the speed of the counterweight. Thus, the need for a dangerous operation of leaning forward on the counterweight side from above the car is eliminated to realize safety. |
