Patent ID: 7264087
Filing Date: 2007-09-04
Classification: B66B

Abstract:
1. 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, the method defining the total mass of the elevator by an 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 fails to supercede A*Maxpayload, controlling the elevator to have a predetermined idle time of the elevator and a predetermined speed and a predetermined acceleration of the motor; and if the payload supercedes A*Maxpayload, controlling the elevator so that at least one of