Method for operating a lift system

EP4590617A1Pending Publication Date: 2025-07-30THYSSENKRUPP ELEVATOR INNOVATION AND OPERATIONS GMBH
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Patent Information

Application Number
EP2023772820
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-09-23
Filing Date
2023-09-15
Publication Date
2025-07-30

AI Technical Summary

Technical Problem

Existing elevator systems face challenges in preventing passenger injuries during emergency braking, particularly during upward or sideways travel, as high deceleration values can lead to skidding or loss of traction, while lower deceleration values result in longer stopping distances and times, and the current stop point concept does not effectively manage these risks.

Method used

The method dynamically adjusts deceleration values based on current travel speed, allowing for different braking scenarios to ensure minimal passenger load and optimal stopping distances, with higher deceleration values used at lower speeds and lower deceleration values at higher speeds, enabling safer and more efficient emergency braking.

Benefits of technology

This approach reduces the risk of injury by allowing faster approach speeds to collision objects while minimizing stopping distances and times, allowing for safer and more efficient emergency braking, and reduces the need for extensive crossing paths in building design.

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Abstract

The invention relates to a method for operating a lift system (50), wherein the lift system (1) has a lift shaft in which at least one first lift car (51a) can travel, wherein, in order to prevent a collision of the first lift car with a collision object (51b, 52W), in particular a second lift car (51b) or a shaft end (52W), if necessary, an emergency braking of the first lift car (51a) is triggered, wherein, during normal operation, in order to initiate the emergency braking, an emergency braking path to a stopping point (SP) is calculated continuously and compared with a current distance (d) of the first lift car from the collision object (51b, 52W), wherein, during normal operation, a deceleration value (b) for the lift car is provided for the calculation, wherein the deceleration value (b1, b2, b3) provided for the calculation is variable and is determined according to a driving situation.
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Citation Information

Patent Citations

  • Special operating mode for stopping an elevator car

    US20100187047A1