An apparatus and method for use during a power disruption to open the elevator brakes enabling the evacuation of passengers trapped in an elevator car. The apparatus comprises at least one flywheel diode (62) configured for anti-parallel arrangement with an output of the pulse electric brake opening device (PEBO). The flywheel diode (62) eliminates back EMF from the brake coil (34) permits continued circulation of current in the brake coil (34). Accordingly, on each electric pulse from the pulse electric brake opening device (PEBO) the jerk experienced by passengers within the car (4) during the manual evacuation procedure is reduced considerably but also the actual time taken to evacuate the passengers is also greatly reduced.
PULSED OPENING OF ELEVATOR BRAKE ENABLING PASSENGER EVACUATION
GEPULSTE ÖFFNUNG EINER AUFZUGSBREMSE ZUR INSASSENEVAKUIERUNG
OUVERTURE PULSÉ DE FREIN D'ASCENSEUR PERMETTANT L'ÉVACUATION DE PASSAGERS
2017-09-13
Patent
Elektronische Ressource
Englisch
IPC: | B66B Aufzüge , ELEVATORS |
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