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US 7,681,694 B2Granted
Energy storage system for elevators
AssigneeKone Corporation
InventorsEsko Aulanko, Timo Syrman, Sakari Korvenranta, Pekka Jahkonen
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Abstract
An elevator system and a method for reducing total power in an elevator system are provided. The elevator system includes at least one elevator without counterweight for moving people and/or goods. The elevator without counterweight comprises a power converter unit, an elevator motor, a traction sheave, a set of hoisting ropes and an elevator car. The elevator system also includes means for storing mechanical energy and discharging an energy storage.
Claims20
An elevator system, said elevator system comprising:
- at least one elevator without counterweight for moving people and/or goods, said elevator without counterweight comprising:
- a power converter unit,
- an elevator motor,
- a traction sheave,
- a set of hoisting ropes, and
- an elevator car;
- and
- means for storing mechanical energy and discharging an energy storage, wherein the means for storing mechanical energy and discharging an energy storage comprises a weighted elevator, said weighted elevator comprising
- a weight,
- a set of hoisting ropes,
- a motor, and
- a traction sheave,
- wherein the power converter unit of the at least one elevator without counterweight for moving people and/or goods and the weighted elevator are connected to a common direct-voltage intermediate circuit.
10 more elements
A method for reducing the total power in an elevator system, the method comprising:
- providing said elevator system comprising at least one elevator without counterweight for transporting people and/or goods, said elevator without counterweight comprising a power converter unit, an elevator motor, a traction sheave, a set of hoisting ropes and an elevator car,
- providing a weighted elevator having a power converter unit, and
- storing mechanical energy and discharging an energy storage in the elevator system using the weight elevator and the power converter unit of the weight elevator.
Dependencies are inferred from the claim text.