Abstract:
A drive control method and system for controlling an inverter (28) during power disruptions. The method of operating an elevator drive (20) during a power disruption comprising the steps of predetermining whether a motor (12) will be operating in motor mode, balanced mode or regenerative mode on commencement of the power disruption, and controlling an inverter (28) in accordance with the predetermined operating mode after commencement of the power disruption (S11).
Abstract:
A apparatus and method for operating an electromagnetic elevator brake ( 14; 16) during mains power disruption or emergency stop comprises the steps of providing an uninterruptible power supply (UPS 1 ) in a power circuit (50) arranged in parallel to a brake coil (34) and repeatedly opening and closing the power circuit (50) during the mains power disruption or emergency stop. In comparison to the conventional braking during power disruption, the periodic or staggered braking provided by the invention greatly extends the time taken to bring the elevator (1 ) to a halt. Accordingly, passengers will feel less discomfort when the elevator ( 1) is braked automatically during power disruption.
Abstract:
Die Erfindung betrifft eine Aufzugsanlage (10), die eine Kabine (12), ein Gegengewicht (14), einen Motor (26) sowie einen ersten und einen zweiten Riemen (16) zum Tragen der Kabine (12) und des Gegengewichtes (14) umfasst. Ferner sind zwei Kraftmesseinheiten (30) vorgesehen, welche die in den Riemen (16) wirkenden Kräfte ermitteln. Ferner umfasst die Aufzugsanlage (10) eine Steuereinheit (32), welche in Abhängigkeit eines Vergleiches zwischen den in den Riemen (16) wirkenden Kräften beim Erfüllen mindestens eines vorbestimmten Kriteriums eine Reaktion auslöst. Ferner betrifft die Erfindung ein Verfahren zum Betreiben einer solchen Aufzugsanlage (10).
Abstract:
A apparatus and method for operating an electromagnetic elevator brake during a mains power disruption or emergency stop includes the steps of providing an uninterruptible power supply in a power circuit arranged in parallel to a brake coil and repeatedly opening and closing the power circuit during the mains power disruption or emergency stop. In comparison to the conventional braking during power disruption, the periodic or staggered braking provided by repeatedly opening and closing the power circuit greatly extends the time taken to bring the elevator to a halt. Accordingly, passengers will feel less discomfort when the elevator is braked automatically during power disruption.
Abstract:
An elevator arrangement (1) comprising a cabin (3) and a counterweight (5) being displaceable in traveling directions (4, 6) within an elevator shaft (11), an elevator controller (13) for controlling motions of the cabin (3) and the counterweight (5), and a safety monitoring device (15) is proposed. The safety monitoring device (15) comprises a 2D-sensor (19) for contactless supervising a supervision plane (21) extending away from the 2D-sensor (19) in an extension direction parallel to the traveling directions and for determining a distance (d) between the 2D-sensor (19) and an object (28) located within the supervision plane (21). Therein, the safety monitoring device (15) is adapted for initiating safety measures upon detecting that the determined distance (d) is smaller than a predetermined allowable minimum distance (d m ). The safety monitoring device (15) may be a relatively simple device such as a scanning laser distance measurement sensor (20). By suitably arranging its supervision plane (21) for example underneath the counterweight (5), serious collisions between the counterweight (5) and for example an extremity of a technician (23) may be avoided.
Abstract:
A method of operating an elevator arrangement (1) with an emergency priority function is proposed. The elevator arrangement (1) comprises an elevator car (3) being movable between various floors (5) upon control by an elevator controller (7). The method comprises: monitoring an emergency call initiator (19) (e.g. emergency button 17), being configured to be actuated e.g. by an person waiting in an affected floor (5). Upon detecting actuation of the emergency call initiator (19), an operation mode of the elevator controller (7) is switched from a normal mode to an emergency priority mode. In such mode, car calls made with lower priority are generally ignored and following emergency actions are performed: - the elevator car (3) is moved directly to the affected floor (5); - passengers are alerted about the emergency; - the passengers are allowed to exit at the affected floor (5) and the person is allowed to enter the elevator car (3); - upon a single selection of a destination floor made by a person in the elevator car (3), the elevator car is moved directly to the destination floor and the person is allowed to exit the elevator car at the destination floor. Upon completion of the emergency actions, the operation mode is switched from the emergency priority mode to a restricted mode in which at least some of functions available in the normal mode are restricted. Resulting from a sum of measures proposed herein, fastest possible transportation may be provided by the elevator arrangement being in the emergency priority mode. However, inter alia due to the subsequent automatically attained restricted operation mode, misuse of the emergency priority function is discouraged.