Abstract:
The present invention discloses a method for determining the parameters connected to the run times of elevators (101) and for using said parameters in the control of the elevators in an elevator system. A plurality of measuring runs is performed with the elevators of the elevator system, and the run events connected to said measuring runs are registered. On the basis of the run events a plurality of run time parameters connected to the run times are determined, on the basis of which the run times of the elevators are calculated for optimally controlling the elevators when the elevators are in transport operation.
Abstract:
A detector for an electromagnetic brake, for example used in an elevator system, that, by quantitative judgment, determines whether the brake force of the electromagnetic brake is appropriate. Load cells 19 for detecting the recovery forces of brake springs 13 are arranged between brake springs 13, which energize brake arms 10 with brake shoes 9 installed on them toward the side of brake wheel 8, and spring sheets 17, which hold brake springs 13 in a compressive deformed state, and, at the same time, judgment part 5c judges whether the brake force of electromagnetic brake 4 is outside a prescribed normal range based on the outputs of load cells 19. If the brake force of electromagnetic brake 4 is outside the normal range, judgment part 5c sends a signal, for example to a monitoring center 23.
Abstract:
The power control of a transport system comprises an electric motor (2) for moving the transport appliance as well as a power supply appliance (3) of the motor, which comprises an intermediate circuit (4,5). The power supply appliance of the motor is fitted between the power source (6) and the electric motor (2). The transport system further comprises a rectifier (7) of the intermediate circuit power, which is fitted between the intermediate circuit (4,5) of the power supply appliance of the motor and the supplied load (14) for transmitting intermediate circuit power to the supplied load.
Abstract:
The invention discloses a protection of an elevator and a method for protecting an elevator, in which the elevator comprises a machinery brake (7), a safety brake (8) of the elevator car (10), and an electrical drive (1) comprising an elevator motor (3) and a power supply appliance (2) of the elevator motor (3). The protection of the elevator comprises restriction of the output of the electrical drive (1) on the basis of the determined limit value (27, 28) for the stator voltage and/or the stator current of the elevator motor (3) and restriction of the movement (12, 29) of the elevator car (10) on the basis of at least one determined limit value (13, 14, 30, 31, 32) for permitted movement of the elevator car (10). At least one limit value for permitted movement of the elevator car (10) is determined at least partly on the basis of the limit value (27, 28) for the stator voltage and/or the stator current of the elevator motor (3) and the elevator car (10) is fitted to move with a restricted movement during the restriction of the movement of the elevator car (10).
Abstract:
The invention discloses a protection of an elevator and a method for protecting an elevator, in which the elevator comprises a machinery brake (7), a safety brake (8) of the elevator car (10), and an electrical drive (1) comprising an elevator motor (3) and a power supply appliance (2) of the elevator motor (3). The protection of the elevator comprises restriction of the output of the electrical drive (1) on the basis of the determined limit value (27, 28) for the stator voltage and/or the stator current of the elevator motor (3) and restriction of the movement (12, 29) of the elevator car (10) on the basis of at least one determined limit value (13, 14, 30, 31, 32) for permitted movement of the elevator car (10). At least one limit value for permitted movement of the elevator car (10) is determined at least partly on the basis of the limit value (27, 28) for the stator voltage and/or the stator current of the elevator motor (3) and the elevator car (10) is fitted to move with a restricted movement during the restriction of the movement of the elevator car (10).
Abstract:
An elevator drive assembly (30) includes a voltage regulator (40) that selectively introduces current under certain conditions. In one example, the voltage regulator (40) introduces a negative flux current to an electric motor (32) when the motor (32) is operating under conditions corresponding to constant speed movement of an elevator car (22). In one example, the added negative flux current effectively reduces the back-EMF voltage of the motor (32) during the constant velocity portion of an elevator run. A disclosed example includes controlling the added current to maintain control over a motor torque constant, which becomes a function of the added current.
Abstract:
The present invention includes a method and a system for communicating with a controller of an elevator car (10). A first input device (40) is inserted between a pair of elevator car sliding doors (12, 14). Energy beams (36) transmitted between the pair of elevator sliding doors (12, 14) are selectively blocked to communicate information to the controller.
Abstract:
Die Erfindung betrifft eine Aufzuganlage (10) umfassend zumindest einen Fahrkorb (12, 14), der eine Fangvorrichtung (74, 80) aufweist und dem eine Steuereinheit (28, 30), ein Antrieb (20, 22) sowie eine Bremse (23, 24) zugeordnet sind, und weiter umfassend eine Sicherheitseinrichtung (42) zur Vermeidung einer Kollision des Fahrkorbes (12, 14) mit einem Hindernis, einem anderen Fahrkorb oder einem Schachtende, wobei mittels der Sicherheitseinrichtung (42) ein tatsächlicher Abstand des Fahrkorbes zu einem Hindernis, einem anderen Fahrkorb oder einem Schachtende mit einem Mindestabstand und einem kritischen Abstand vergleichbar ist. Unterschreitet der tatsächliche Abstand den Mindestabstand, so kann ein Nothalt ausgelöst werden. Unterschreitet der tatsächliche Abstand den kritischen Abstand, so kann die Fangvorrichtung (74, 80) des Fahrkorbes (12, 14) ausgelöst werden. Um die Aufzuganlage derart weiterzubilden, dass der vom Fahrkorb (12, 14) mindestens einzuhaltende Abstand zu einem Hindernis, einem anderen Fahrkorb oder einem Schachtende verringert werden kann, ohne dass ein Nothalt oder eine Fangvorrichtung (74, 80) ausgelöst wird, eine Fahrkorbkollision jedoch zuverlässig verhindert werden kann, wird vorgeschlagen, dass mittels einer Bestimmungseinheit (60) der Sicherheitseinrichtung (42) der kritische Abstand entsprechend einer vorgebbaren Nothalt-Auslösekurve (93) und der Mindestabstand entsprechend einer vorgebbaren Fang-Auslösekurve (90) bestimmbar ist, wobei die Fang-Auslösekurve (90) eine Nothalt-Fahrkurve (94) nicht berührt, und dass die Fangvorrichtung (74, 80) auslösbar ist, noch bevor der Fahrkorb (12, 14) den Ort erreicht hat, dem nach der Nothalt-Fahrkurve (94) die Geschwindigkeit Null zugeordnet ist.
Abstract:
The invention concerns a device, a method and a system for improving the safety system of an elevator. The safety system of the invention comprises an electric safety device, which monitors the velocity and position of the elevator in the elevator shaft. The safety device is e.g. a computer that is able to stop the elevator, using the brake of the hoisting machine or an optional car brake. The basic idea of the safety system of the invention is to form a continuous limit curve for control of elevator speed. The limit curve defines the limits of allowed elevator motion, which are determined on the basis of the nominal speed of the elevator and the location of the car. The safety system of the invention comprises measuring means for continuous measurement of elevator motion data and a safety device that receives data about the motion of the elevator, calculates its velocity at each instant of time utilizing the elevator motion data and watches the elevator motion to ensure that it remains within the allowed limit curve. Moreover, the safety system comprises a stopping device for stopping uncontrolled motion of the car if the elevator motion exceeds the limit curve set for it.