Method and system for an automatic rescue operation of an elevator car
AssigneeKone Corporation
InventorsJuhamatti Nikander, Janne Salomäki
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Abstract
In a system and method for an automatic rescue operation of an elevator car in an elevator system, the elevator system includes a hoisting machine and a battery-operated rescue drive device configured to provide power signals to the hoisting machine and/or hoisting machinery brakes. A load sensor is configured to gather elevator car load information, and the rescue drive device is configured to select, based on the elevator car load information, a first rescue run or a second rescue run.
Claims20
A method for an automatic rescue operation of an elevator car in an elevator system, said elevator system comprising a hoisting machine and a battery-operated rescue drive device providing power signals to the hoisting machine and/or hoisting machinery brakes, the method comprising the steps of:
- gathering, by a load sensor, elevator car load information;
- and
- selecting based on the elevator car load information, by the rescue drive device, a first rescue run or a second rescue run,
- wherein said first rescue run comprises supplying electrical power from a battery of the rescue drive device to an electric motor of the hoisting machine and/or hoisting machinery brakes to initiate movement of the elevator car,
- wherein said second rescue run comprises shorting windings of the electric motor of the hoisting machine to apply dynamic braking of the electric motor,
- wherein the first rescue run is selected if the elevator car load is within a first range of a rated load of the elevator car, and
- wherein the second rescue run is selected if the elevator car load is within a second range of the rated load of the elevator car.
A system for an automatic rescue operation of an elevator car in an elevator system, said elevator system comprising a hoisting machine and a battery-operated rescue drive device configured to provide power signals to the hoisting machine and/or hoisting machinery brakes,
- wherein a load sensor is configured to gather elevator car load information, and the rescue drive device is configured to select, based on the elevator car load information, a first rescue run or a second rescue run,
- wherein said first rescue run comprises supplying electrical power from a battery of the rescue drive device to an electric motor of the hoisting machine and/or hoisting machinery brakes to initiate movement of the elevator car,
- wherein said second rescue run comprises shorting windings of the electric motor of the hoisting machine to apply dynamic braking of the electric motor,
- wherein the battery-operated rescue drive device is configured to select the first rescue run if the elevator car load is within a first range of a rated load of the elevator car, and
- wherein the battery-operated rescue drive device is configured to select the second rescue run if the elevator car load is within a second range of the rated load of the elevator car.
Dependencies are inferred from the claim text.