Wind energy plant with a hydraulically actuated rotor brake...

Details Wind energy plant with a hydraulically actuated rotor brake... Wind energy plant with a hydraulically actuated rotor brake...

2007-07-11

2009-08-04

Schwartz, Christopher P (Department: 3657)

Fluid-pressure and analogous brake systems

Multiple systems

C303S003000, C060S422000

Reexamination Certificate

active

07568772

ABSTRACT:
A method for controlling a hydraulically actuated rotor brake for a drive train of a wind energy plant, wherein the rotor brake is realized as an active rotor brake, which exerts a braking moment getting stronger when the hydraulic pressure increases, wherein in a first phase, a brake cylinder is pressurized with a first pressure via a first pressure reducing valve, in a second phase, the brake cylinder is pressurized with a second pressure via a second pressure reducing valve, and a switchover equipment is provided, which switches over from the first pressure to the second pressure.

REFERENCES:
patent: 6254197 (2001-07-01), Lading et al.
patent: 6477836 (2002-11-01), Bianchetta et al.
patent: 27 45 276 (1978-03-01), None
patent: 10 2004 057 522 (2006-04-01), None
patent: 10 2004 057 739 (2006-04-01), None
patent: 103 20 580 (2006-11-01), None
Windkraftanlagen, 3rd Edition, by Erich Hau, Springer-Verleg Verlin, Chapter 8.7. pp. 287-289.

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