Method For Performing an Elevator Rescue Run
First Claim
1. A method for performing and elevator rescue run in an emergency situation, the elevator comprising an elevator car, a counter weight, a rope suspending the car and the counterweight, a drive motor, an emergency break for stopping the car in an emergency situation, and a motor drive unit for supplying drive power to and for controlling the drive motor, comprising the steps of:
- (a) operating the motor drive unit in a zero speed demand mode for holding the car at its present position;
(b) lifting the emergency brake, while holding the car in the zero speed demand mode;
(c) determining a 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.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
-
Citations
16 Claims
-
1. A method for performing and elevator rescue run in an emergency situation, the elevator comprising an elevator car, a counter weight, a rope suspending the car and the counterweight, a drive motor, an emergency break for stopping the car in an emergency situation, and a motor drive unit for supplying drive power to and for controlling the drive motor, comprising the steps of:
-
(a) operating the motor drive unit in a zero speed demand mode for holding the car at its present position; (b) lifting the emergency brake, while holding the car in the zero speed demand mode; (c) determining a 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An elevator comprising:
-
an elevator car; a counterweight; a rope suspending the car and the counterweight; a drive motor; an emergency break for stopping the car in an emergency situation; and a motor drive unit for supplying drive power to and of controlling the drive motor; and wherein the motor drive unit is adapted to operate in a zero speed demand mode for holding the car at a particular position and to determine the preferred movement direction of the car based on the power data as obtained by the motor drive unit while holding the case in the zero speed demand mode, and wherein the elevator further comprises a means for setting the motor drive unit into the zero speed demand mode in case of and emergency situation in preparation of a rescue run and for subsequently activating performance of the rescue run in the direction of the determined preferred movement direction. - View Dependent Claims (12, 13, 14, 15, 16)
-
Specification