公开(公告)号：US20210371241A1

公开(公告)日：2021-12-02

申请号：US17235145

申请日：2021-04-20

Applicant: KONE Corporation

Inventor： Tapani Talonen ,  Kari Rahkonen ,  Tapio Siironen ,  Mikko Viljanen

IPC: B66B5/00 ,  B66B5/02 ,  B66B5/06 ,  B66B1/32 ,  B66B1/34

Abstract: An elevator safety monitoring system, an elevator system, an elevator drive unit, and a method for operating an elevator are presented. The elevator safety monitoring system includes an elevator car absolute position and speed feedback device, a safety monitor connected to the absolute position and speed feedback device, and a safety zone extending inside an elevator shaft. The safety zone is associated with an allowable maximum speed of an elevator car, wherein the allowable maximum speed is lower than a rated speed of an elevator car outside the safety zone, wherein the safety monitor is configured to determine a slowdown failure of the elevator car approaching the safety zone, and, upon the determination of the slowdown failure, command an actuator to decelerate the elevator car to the allowable maximum speed.