Control of an elevator
AssigneeKone Corporation
InventorGiovanni Hawkins
Life of this patent
Estimating the term…
Abstract
Method and system of controlling a counterweightless elevator system provided with an elevator car and a variable speed drive with an electric motor, wherein the elevator car load is weighed, and wherein the elevator system is controlled in order to reduce the physical/electrical dimensions of the system. The total mass of the elevator is defined by the equation Mtotal=Mcar (mass of the car)+A*Maxpayload, wherein Mcar is the mass of the car, A is a coefficient and Maxpayload is the maximal payload. If the payload supercedes A*Maxpayload the elevator is controlled so that the speed and/or acceleration of the motor is reduced, and/or the idle time of the elevator is increased.
Claims10
Method of controlling a counterweightless elevator system provided with an elevator car and a variable speed drive with an electric motor, wherein the elevator car load is weighed, and wherein the elevator system is controlled in order to reduce the physical/electrical dimensions of the system, characterized in that the total mass of the elevator is defined by the equation Mtotal=Mcar (mass of the car)+A*Maxpayload, wherein Mcar is the mass of the car, A is a coefficient and Maxpayload is the maximal payload, and that if the payload supercedes A*Maxpayload the elevator is controlled so that
- the speed and/or acceleration of the motor is reduced, and/or
- the idle time of the elevator is increased.
System of controlling a counterweightless elevator system provided with a control unit, an elevator car and a variable speed drive with an electric motor, the system comprising:
- means for weighing the load of the car, characterized in that the control unit defines the total mass of the elevator is by the equation Mtotal=Mcar (mass of the car)+A*Maxpayload, wherein Mcar is the mass of the car, A is a coefficient and Maxpayload is the maximal payload, and that if the payload supercedes A*Maxpayload the elevator is controlled so that
- the speed and/or acceleration of the motor is reduced, and/or
- the idle time of the elevator is increased.
Dependencies are inferred from the claim text.