- Document Number:
20250011131
- Appl. No:
18/704963
- Application Filed:
November 03, 2022
- نبذة مختصرة :
A method identifies a stuck situation of an elevator car and a counterweight suspended by carrying means on a traction sheave rotated by an electric motor. The method includes: receiving a load signal of a weight of a load located in the car; determining a preliminary torque depending on the load signal; receiving a speed signal representative of an actual speed of the car); monitoring a correction torque over a specified monitoring time period, the correction torque being determined depending on the speed signal and a specified reference speed such that the actual speed of the car approximates the reference speed; identifying the stuck situation wherein the car or the counterweight remains stuck, when the monitored correction torque meets at least one specified criterion; and carrying out a specified safety measure when the stuck situation is identified.
- Claim:
1-15. (canceled)
- Claim:
16. A method for identifying a situation of being stuck in an elevator system, wherein the elevator system has an elevator shaft, a car arranged in the elevator shaft, a counterweight arranged in the elevator shaft and being connected to the car by a carrying means, an electric motor having a traction sheave over which traction sheave the carrying means runs, wherein the electric motor rotates the traction sheave to move the carrying means so that the car and the counterweight are displaced vertically, and a brake by which the car and/or the counterweight is braked and/or stopped, the method comprising: receiving a load signal representative of a weight of a load located in the car, the load intended to be transported by the car; determining a preliminary torque depending on the load signal; receiving a speed signal representative of an actual speed of the car; monitoring a correction torque over a specified monitoring time period, wherein the correction torque is determined depending on the speed signal and a specified reference speed, and using the preliminary torque and the correction torque to control the electric motor such that the actual speed of the car approximates the reference speed; identifying the situation of being stuck, in which the car or the counterweight remains stuck in the elevator shaft when the monitored correction torque meets at least one specified criterion; and performing a specified safety measure when the situation of being stuck is identified.
- Claim:
17. The method according to claim 16 wherein, when monitoring the correction torque, determining a maximum correction torque and a minimum correction torque within the specified time period, and wherein the at least one specified criterion is met if a difference between the maximum correction torque and the minimum correction torque is greater than a specified threshold.
- Claim:
18. The method according to claim 16 including determining a total torque depending on the preliminary torque and the correction torque, and determining at least one reference current for operating the electric motor depending on the total torque.
- Claim:
19. The method according to claim 16 wherein the preliminary torque comprises a load torque added to an acceleration torque.
- Claim:
20. The method according to claim 19 including determining the load torque such that, when the brake is released, the car does not move as a result of the determined load torque alone.
- Claim:
21. The method according to claim 19 wherein the load signal is representative of a difference between a first weight suspended on a side of the traction sheave on which the counterweight is suspended and a second weight suspended on a side of the traction sheave on which the car is suspended, and the load torque is determined depending on the load signal.
- Claim:
22. The method according to claim 19 including determining the acceleration torque such that the car moves with a reference acceleration due to the acceleration torque.
- Claim:
23. The method according to claim 19 including determining a current mass moment of inertia representative of a current mass inertia of the elevator system, and determining the acceleration torque depending on the current mass moment of inertia and a reference acceleration.
- Claim:
24. The method according to claim 16 wherein the specified safety measure comprises stopping the electric motor and/or generating an error message.
- Claim:
25. The method according to claim 16 including starting monitoring of the correction torque when at least one specified starting condition is met.
- Claim:
26. The method according to claim 25 wherein the at least one specified starting condition comprises: the correction torque is determined twice in a row, and the correction torque meets the at least one specified criterion in both determinations; the reference speed is not equal to zero; and/or after the car has started moving, a specified run-up period has elapsed.
- Claim:
27. A control device for an elevator system, the control device including a processor adapted to perform the method according to claim 16 and a weight sensor generating the load signal.
- Claim:
28. An elevator system comprising: the control device according to claim 27; an elevator shaft; a car arranged in the elevator shaft; a counterweight arranged in the elevator shaft and connected to the car by a carrying means; an electric motor having a traction sheave over which traction sheave the carrying means runs, wherein the electric motor rotates the traction sheave to move the carrying means so that the car and the counterweight are displaced vertically; and a brake by which the car and/or the counterweight is braked and/or stopped.
- Claim:
29. A computer program stored on a non-transitory computer-readable medium and comprising commands that when executed by a processor cause the method steps according to claim 16 to be carried out.
- Claim:
30. A non-transitory computer-readable medium on which the computer program according to claim 29 is stored.
- Current International Class:
66; 66
- الرقم المعرف:
edspap.20250011131
Processing Request
No Comments.