Wind turbine with hydrostatic transmission
US8432054B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2011 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Jun 29, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E70/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A wind turbine has a rotor; a hydraulic pump coupled to the rotor, two or more variable displacement hydraulic motors which are driven by fluid flow from the hydraulic pump, at least one generator coupled to the variable displacement hydraulic motors and a closed loop hydraulic oil circuit for carrying pressurized oil from the hydraulic pump to the motors and to return oil to the pump from the motors. A controller in the closed loop hydraulic oil circuit controls the flow of oil in the closed loop circuit and displacement in each of the variable displacement hydraulic motors. Control of flow in and out of the motor for each revolution of that motor controls the flow to the hydraulic pump which has a fixed displacement, thereby controlling its rpm, thereby controlling the rotor rpm. A hydraulic accumulator can be provided in the closed loop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.