Patent attributes
Method for performing an elevator rescue run in an emergency situation, the elevator comprising and elevator car, a counter weight, a rope suspending the car and the counterweight, a drive motor, an emergency brake for stopping the car in an emergency situation, and a motor drive unit for supplying drive power to and for controlling the drive motor, having the following rescue run sequence steps:(a) operating the motor drive unit in a zero speed demand mode for holding the car at its present position;(b) lifting the brake, while holding the car in the zero speed demand mode;(c) determining the preferred movement direction of the car based on the power data as obtained by the motor drive unit; and(d) performing the rescue run in the direction of the determined preferred movement direction.
