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Patent Searching and Data


Title:
RENEWABLE ENERGY EXTRACTION DEVICE SUCH AS A WIND TURBINE WITH HYDRAULIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2012/073389
Kind Code:
A1
Abstract:
The invention provides a method of operating an energy extraction device such as a wind turbine comprising a hydraulic pump driven by and applying torque to a rotating shaft, a hydraulic motor driving a load, a high pressure manifold in fluid communication with an outlet of the hydraulic pump and an inlet of the hydraulic motor and being selectively placed in fluid communication with a fluid accumulator, at least one low pressure manifold in fluid communication with an outlet of the hydraulic motor and an inlet of the hydraulic pump, at least one of the hydraulic pump or hydraulic motor is a digital hydraulic machine, characterised by interrupting fluid communication between the fluid accumulator and the high pressure manifold responsive to detection of a fault event.

Inventors:
RAMPEN WILLIAM (GB)
Application Number:
PCT/JP2011/000917
Publication Date:
June 07, 2012
Filing Date:
February 18, 2011
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD (JP)
RAMPEN WILLIAM (GB)
International Classes:
F03D9/00; F03D11/02
Domestic Patent References:
WO2009076757A22009-06-25
WO2009058022A12009-05-07
WO2007053036A12007-05-10
WO2008029073A12008-03-13
Foreign References:
EP1555441A12005-07-20
EP2154368A22010-02-17
GB2465485A2010-05-26
US20070024058A12007-02-01
US4503673A1985-03-12
US4496847A1985-01-29
US4280061A1981-07-21
US4274010A1981-06-16
GB2009051154W2009-09-09
EP0361927A11990-04-04
EP0494236A11992-07-15
EP1537333A12005-06-08
Attorney, Agent or Firm:
TAKAHASHI, MATSUMOTO & PARTNERS INTELLECTUAL PROPERTY CORP. (Ambassador Roppongi Buildings 16-13, Roppongi 3-chome, Minato-k, Tokyo 32, JP)
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Claims: