A hydraulic control system HCS for controlling a variable ratio transmission of a power generating system. A hydraulic motor/pump unit 140 is operably connected to a superposition gear, and is connected to a hydraulic circuit that comprises an orifice 28 and/or a relief valve 29 that opens at a predetermined hydraulic pressure. The hydraulic circuit switches between a variable low-speed operating mode and a torque limiting high-speed operating mode. In the torque limiting high-speed operating mode the hydraulic motor/pump unit 140 is driven by the superposition gear and drives hydraulic fluid through the orifice 28 and/or relief valve 29 to provide a passive torque limiting function. In the variable low-speed operating mode the hydraulic motor/pump unit 140 drives the superposition gear and the hydraulic control system provides a desired rotor 101 speed by controlling hydraulic fluid flow rate through the hydraulic motor/pump unit 140.

A planetary gear train for a wind power plant includes a planetary stage rotating in a gear train housing, a spur gear stage downstream of the planetary stage, a sun wheel shaft which is non-rotatably connected to a sun wheel of the planetary gear stage, and a hollow shaft which is coaxially surrounded by a spur gear of the spur gear stage and is non-rotatably connected to the spur gear. The sun wheel shaft and the hollow shaft are non-rotatably connected to each other by a toothed coupling, with an outer toothing of the sun wheel shaft meshing with an inner toothing of the hollow shaft. The planetary gear train includes oil-guide ducts which produce a connection between an oil inlet connected to the gear train housing, on the one hand, and the toothed coupling and the axial contact surface, on the other hand.

A method for controlling a wind turbine may generally include operating the wind turbine at an initial power output that is greater than a rated power output associated with the wind turbine. The wind turbine may have an anticipated operational life at the rated power output. In addition, the method may include decreasing a power output of the wind turbine over time in order to maintain an actual operating life of the wind turbine substantially equal to or greater than the anticipated operational life. A final power output of the wind turbine at an end of the anticipated operating life may be less than the rated power output.

A wind park controller and control method for a wind park (10) are described. The wind park comprises a plurality of wind turbines (20) and an Energy Storage System (24) connected to one another by means of a low voltage power network (22, 25), which is in turn coupled to the grid. The controller determines a number of operating parameters of the wind turbine gearbox or drive train, and calculates a gearbox or drive train health metric. This can include a measure of the gearbox lifetime. The controller also determines one or more power characteristics of the wind turbine generator or the point of common coupling (26) to determine a power mismatch indication. Based on the power mismatch indication and said gearbox or drive train health metric, the controller determines a power command for the Energy Storage System and wind turbines based to improve the gearbox health and lifetime.

A one-way clutch, disposed between an input rotating body and an output rotating body, is used to connect the input and output rotating bodies so that the rotating bodies are rotatable integrally in a state in which the rotation speed of the input rotating body is higher than that of the output rotating body and to cut off the connection between the input and output rotating bodies in a state in which the rotation speed of the input rotating body is lower than that of the output rotating body. A plurality of engaging elements or an inner ring and an outer ring constituting the one-way clutch are made of a base material obtained by subjecting a martensitic stainless steel material to soft nitriding treatment, and the Vickers hardness of the portion up to 20 μm from the surface of the contact portion thereof is 1000 to 1500 Hv.

A ram air turbine is presented that includes a turbine having a blade and a turbine shaft, a strut removably coupled to the turbine, wherein the strut has a gearbox section and a drive section, a turbine shaft with a bevel gear oriented perpendicularly to the turbine shaft and positioned within the gearbox section of the strut, a driveshaft coupled to the generator and positioned within the drive section of the strut, and a pinion gear that engages with the bevel gear, wherein the pinion gear is secured to the driveshaft by a spanner nut, wherein the pinion gear utilizes a key configured to interact with the keyed joint of the driveshaft. The pinion gear is supported by a pinion bearing that may be press fit onto the pinion gear and by one of the generator bearings.

Provided is a cable twist allowance system for a wind turbine system. The system includes a sun gear disposed within a tower of wind turbine, a pivot disk connected with the sun gear, a plurality of lever members, each including a plurality of cables and spaced a predetermined distance apart from each other, the plurality of level members being pivotably connected with a surface of the pivot disk and rotatable about the sun gear; and a plurality of compression members, each compression member corresponding to each lever member and adjusting a position of a respective lever member based on a radial force applied to the plurality of cables of the respective lever member.

A system with orbiting axis for converting energy from a fluid includes an inner transmission shaft and an output transmission shaft; a sectorial blade configured to exchange energy with the fluid and connected to the inner transmission shaft a support element pivotable such that the blade is configured to rotate around an axis of the inner transmission shaft; a group for synchronization and transmission of rotation-oscillation movement of the blade and including the inner transmission shaft and the output transmission shaft. The support element is hinged to the inner transmission shaft by a first rotator rigidly connected, at a first extremity, with the support element by a pin and, at a second extremity, to one of the transmission shafts, each blade being configured to perform the rotation-oscillation movement integrally with the support element and always oriented in the direction of the fluid.

A system with orbiting axis for converting energy from a fluid includes an inner transmission shaft and an output transmission shaft; a sectorial blade configured to exchange energy with the fluid and connected to the inner transmission shaft a support element pivotable such that the blade is configured to rotate around an axis of the inner transmission shaft; a group for synchronization and transmission of rotation-oscillation movement of the blade and including the inner transmission shaft and the output transmission shaft. The support element is hinged to the inner transmission shaft by a first rotator rigidly connected, at a first extremity, with the support element by a pin and, at a second extremity, to one of the transmission shafts, each blade being configured to perform the rotation-oscillation movement integrally with the support element and always oriented in the direction of the fluid.

An apparatus for amplifying rotating force of a wind power generator includes a blade rotated by wind power, a central rotating shaft rotated by the rotation of the blade, upper and lower horizontal rotating units spread upwards or downwards when the blade rotates, upper and lower fastening plates, a vertical rotating unit continuously rotating the upper horizontal rotating unit and doubling the rotating speed of the upper horizontal rotating unit by repulsive force of a magnetic member, a horizontal rotating shaft rotating the vertical rotating unit as the blade rotates, a shaft conversion unit rotating the horizontal rotating shaft by the rotation of the central rotating shaft, a horizontal-rotating-shaft support supporting the vertical rotating unit and the horizontal rotating shaft, a frame unit stably holding the apparatus and protecting the apparatus from external force, and a bearing.