Kone Elevator Gmbh

Kone Oy

Ralf Ekholm

Seppo Suur-Askola

Timo Lehtonen

Seppo J Ovaska

Reserve power system

Procedure for controlling an elevator

The invention relates to an apparatus for regulating the speed of an a.c. elevator motor (10) by means of a frequency converter (8) consisting of a rectifier bridge (12) and an inverter bridge (14) with an intermediate circuit between them. The frequency of the frequency converter is adjusted until it corresponds to a frequency reference (f.sub.ref) corresponding to the speed reference (v.sub.ref,v.sub.ref ') of the motor. The velocity of the motor (v.sub.real) is measured to form a speed feedback signal. According to the invention, the apparatus has elements (24,26) for correcting the speed reference (v.sub.ref) on the basis of the change occurring in the voltage (U.sub.c) of the intermediate circuit.

Apparatus for regulating an elevator motor

A system for selecting an elevator in a group consisting of elevators serving the floors of a building, each floor being provided with call input devices for the input of the passengers' calls, the elevator group having a group control unit controlling the group and provided with at least one computer. On the basis of the call sent by a call input device, the group control unit finds out which call input device has issued the call and selects one of the elevators for serving the floor in question on the basis of the passengers' location on the landing according to the information thus obtained.

Selection of an elevator for service based on passenger location and

Vertical transport system in a building provided with one or more hoistways with elevator cars moving in them, comprises at least one hoistway accommodating at least two elevator cars travelling above one another in such a manner that one (2) of the cars travels in the hoistway (1) between the entrance floor and a certain higher floor or certain higher floors, i.e. change levels (11,13a,13b,18). One or more other cars (4,5) travel in the part of the same hoistway (1) which lies above the change levels (11,13a,13b,18), in the spaces between or divided by the hoisting ropes (3) of the elevator operating in the lower part of the hoistway.

Vertical transport system in a building

A method for increasing the transportation capacity of elevators in a building involving dividing the elevators (2-7) into two or more groups, each comprising one or more elevators, in such manner that in certain loading situations the groups will temporarily serve different zones (11, 12) of the building (1). Upward peak traffic conditions are detected and the boundaries between zones (11, 12) are determined and maintained by the steps which include:

Method for sub-zoning an elevator group

The present invention concerns a procedure for modernizing the control system of a lift group, in which procedure the group control system coordinating the operation of the lifts is renovated and connected to the already existing lift-specific control system. As taught by the new procedure, for each lift is connected one matching computer between the new group control and the apparatus controlling the functions of the lift, and by the aid of which the lift-specific signals are transmitted to the control of the lift and to the group control.

Procedure for modernizing the control system of a lift

In a method for coordinating elevator group traffic in a building with one or more change levels constituting an end station for elevator groups operating above and below the change level, and in order to reduce waiting times in tall buildings, the control of at least some of the elevator groups operating on opposite sides of the change level is subordinated to a centralized control algorithm which, depending on the traffic condition, alters the control parameters for the elevator groups in such manner that, when the main direction of traffic is upwards, in order to serve the passengers of the elevators arriving from one side of the change level, either the elevators operating on the other side are caused to arrive more quickly to the change level to minimize the waiting time for the passengers arriving from the opposite side, and/or the departures of the elevators which have stopped at the change level are retarded to allow the passengers arriving from the other side to get on board, and that when the main direction of traffic is downwards, in order to serve the passengers of the elevators arriving from one side of the change level, either the elevators are caused to arrive quicker to the change level and/or the elevators on the other side are kept waiting to allow the arriving passengers to catch them.

Growing community of inventors

Helsinki, Finland

Ralf Ekholm