发明名称 |
BLADE PITCH CONTROLLER, WIND TURBINE GENERATOR, AND METHOD OF CONTROLLING BLADE PITCH |
摘要 |
A hydraulic cylinder is coupled to blades of a wind turbine generator and actuated to change a pitch angle of the blade. A variable displacement hydraulic pump supplies hydraulic oil to the hydraulic cylinder, and a discharge pressure of the pump does not follow a load pressure. When the discharge pressure of the hydraulic pump becomes a set pressure, a pressure control valve is opened to change a discharge amount of the hydraulic pump, and to make the discharge pressure of the hydraulic pump to be a pressure smaller than a cut off pressure. Further, a setting control unit sets the set pressure based on the hydraulic pressure that the hydraulic cylinder requires such that the set pressure becomes a minimum pressure required to change the pitch angle to a predetermined angle by the hydraulic cylinder.
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申请公布号 |
US2012134801(A1) |
申请公布日期 |
2012.05.31 |
申请号 |
US201113023008 |
申请日期 |
2011.02.08 |
申请人 |
SEKI SEITA;NUMAJIRI TOMOHIRO;MITSUBISHI HEAVY INDUSTRIES, LTD. |
发明人 |
SEKI SEITA;NUMAJIRI TOMOHIRO |
分类号 |
F03D7/00 |
主分类号 |
F03D7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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