An elevator system drive includes: an electric machine: a first converter electrically connected to an alternating current source and the electric machine: a drive controller controlling the drive: a drive safety circuit unit electrically connected to a safety circuit of the elevator system, to a controller of the elevator system, and to the drive controller; and at least one mechanical brake that is closed by a brake closing command from the elevator system controller. The drive safety circuit unit operates in a first operating state wherein it transmits an emergency stop command coming from the elevator system safety circuit directly and without delay to the first converter, and operates in a second operating state wherein it relays a modified emergency stop command coming from the elevator system safety circuit, with a delay, to the first converter to ensure safe braking of the elevator system even if the mechanical brakes fail.
ANTRIEB EINER AUFZUGSANLAGE
DRIVE OF AN ELEVATOR SYSTEM
MÉCANISME D'ENTRAÎNEMENT D'UN SYSTÈME D'ASCENSEUR
2022-03-16
Patent
Electronic Resource
German
IPC: | B66B Aufzüge , ELEVATORS |
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