Title:
FLYWHEEL-BASED ENERGY STORAGE ON A HEAVE-COMPENSATING DRAWWORKS
Document Type and Number:
WIPO Patent Application WO/2011/028895
Kind Code:
A3
Abstract:
A system (30) for managing energy consumption in a heave-compensating drawworks includes a power supply (40), a winch drum (28) connected to the power supply (40) so as to receive power from the power supply, a flywheel (52) connected to the winch drum (28) and to the power supply (40), and a controller (42) connected to the power supply and to the winch drum for passing energy to and from the flywheel during an operation of the winch drum. The flywheel (52) includes a disk rotatably coupled to an AC motor (54). The power supply (40) includes a first pair of AC motors (64, 66) operatively connected on one side of the winch drum (28) and a second pair of AC motors (68, 70) operatively connected on an opposite side of the winch drum.
Inventors:
WILLIAMS KEVIN R (US)
Application Number:
PCT/US2010/047665
Publication Date:
June 03, 2011
Filing Date:
September 02, 2010
Export Citation:
Assignee:
WILLIAMS KEVIN R (US)
International Classes:
H02J3/30; H02K7/02; H02P5/74
Domestic Patent References:
| WO1987007587A1 | 1987-12-17 |
Foreign References:
| US7228942B2 | 2007-06-12 | |||
| US3638480A | 1972-02-01 | |||
| US20080203734A1 | 2008-08-28 | |||
| US5936375A | 1999-08-10 |
Other References:
See also references of EP 2474078A4
Attorney, Agent or Firm:
EGBERT, John, S. (PLLC412 Main St., 7th Floo, Houston TX, US)
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