Back to results
US 2009/0014252 A1Published application
Elevator drive assembly including a capacitive energy storage device
OwnerSastry V. Vedula, Mark S. Thompsoninventors
Life of this patent
Estimating the term…
Abstract
An elevator drive assembly (20) includes a motor (28), drive (32) and a capacitive energy storage device (50). In a disclosed example, the capacitive energy storage device (50) comprises at least one nano-gate capacitor (52). The disclosed example has unique energy storage capabilities provided by the presence of the at least one nano-gate capacitor.
Claims10
An elevator drive assembly, comprising:
- an electrical machine;
- a drive that controls operation of the electrical machine to achieve a desired elevator system operation;
- and
- a capacitive energy storing device comprising at least one double-layer electrochemical capacitor electrically coupled with at least the drive for selectively receiving electrical energy from operation of the electrical machine or providing electrical energy for use in operating the electrical machine.
1 more element
A method of operating an elevator drive assembly, comprising the steps of:
- selectively and electrically coupling a capacitive energy storing device that includes at least one double-layer electrochemical capacitor with an electrical machine or a drive of the drive assembly;
- providing electrical energy resulting from operation of the electrical machine to the capacitive energy storing device during a first operating condition of the motor;
- and
- providing electrical energy from the capacitive energy storing device for operating the electrical machine during a second operating condition of the motor.
1 more element
Dependencies are inferred from the claim text.