Patent ID: 11866295
Assignee: OTIS ELEVATOR COMPANY
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 10:
11. A method of operating a control system of an elevator system, the control system comprising a safety controller which resides in a drive component comprising a controller receptive of elevator car condition data and a power section configured to normally operate a driving machine and a braking assembly autonomously, the method comprising:
actively controlling a deceleration rate during an incident that requires engagement of at least one of primary and secondary brake to decelerate an elevator by:
determining which of the driving machine and the braking assembly is to be operated as the primary brake and the secondary brake,
operating the one of the driving machine and the braking assembly as the primary brake in accordance with the determining,
determining whether the deceleration rate is above, below or within a target range, and
adjusting the deceleration rate in response to the declaration rate being outside the target range by adjusting the operating of the primary brake when the deceleration rate is determined to be above the target range and by operating the secondary brake when the deceleration rate is determined to be below the target range.