Conventionally, a generator rotor is supported on a main shaft and this requires the main shaft to be designed to be long, increasing its weight and adversely affecting easiness of assembly. A wind turbine apparatus has a structure where heavy components such as a wind wheel, generator, etc. are held on a tower having a specified height; therefore, it is a natural demand to reduce the weight of the apparatus as much as possible. A hub (29) is supported at one end of a main shaft (10), and a generator rotor (12) is supported at the other end. A main shaft housing (40) and a generator housing (20) are integrated. The generator rotor (12) fixed to the rear of the main shaft (10) has a shape open rearward. The main shaft (10) and the generator rotor (12) are removably fixed from the rearward open section. At least a rotary joint section (33) of a pitch control shaft (37) is provided at a rear opening of the generator housing (20).

Wind turbine apparatus

The disclosure describes implementations of methods, systems and apparatuses that are configured to facilitate normal operating characteristics for a wind turbine during normal operation, as well as during voltage irregularities. In an implementation, a turbine controller coordinates operating primary turbine systems and ancillary turbine systems during normal operation and during voltage irregularities. During normal operation, the turbine controller coordinates powering both primary and ancillary turbine systems through a power supply. During a detected voltage event, ancillary turbine systems may be transitioned to a having an uninterruptible power supply power these systems. However, the turbine controller coordinates maintaining the power supply as the sole powering device for primary turbine systems despite a voltage irregularity. In some implementations, when the power supply reaches a critical level during a voltage irregularity, a system fault flag is generated and the turbine blades may be driven into a full feather operational position.

Systems, methods and apparatuses for a wind turbine controller

A vertical axis sail-type wind turbine includes an array of sail-like structures that are mounted on rotating main masts The sail-like structures can be oriented to interact with the wind For example, when the sail-like structures are moving in a downwind direction, they are oriented to present a flat surface that is perpendicular to the wind direction On the other hand, when the sail-like structures are moving in an upwind direction, they are oriented to present a surface that is at an angle that creates an upwind vector The sail-like structures rotate about the sail masts, which are rotatably mounted to sail mounting arms that are firmly mounted to a main mast The main mast rotates, transferring power through a gear and shaft drive to hydraulic pumps in the tower This hydraulic fluid pressure is then used to drive an electrical generator

Vertical Axis Wind Turbine

A method for reducing at least one of loads, deflections of rotor blades, or peak rotational speed of a wind turbine includes storing recent historical pitch related data, wind related data, or both. The stored recent historical data is analyzed to determine at least one of whether rapid pitching is occurring or whether wind speed decreases are occurring. A minimum pitch, a pitch rate limit, or both are imposed on pitch angle controls of the rotor blades conditioned upon results of the analysis.

Method and apparatus for reducing rotor blade deflections, loads, and/or peak rotational speed

A method which continuously reduces the variations of the rotor axial force and thus reduces fatigue loads on rotor blades and tower, whilst the resultant output to the generator is not significantly affected or is maintained within acceptable limits in relation to limitations of the drive gear, generator and power grid. A method of using the rotor axial force to actively counter the motions of a floating power plant. The method of using the rotor axial force to actively counter the motions of a floating power plant. The method also describes how rotational forces about the vertical axis (12) of the tower (4) are controlled and countered by cyclic variation of pitch angles and associated forces on the individual rotor blade. The method also describes how the aerodynamic force variation on each individual blade as a consequence of different wind velocities at different heights (vertical wind shear) and in the horizontal direction parallel to the rotor plane (horizontal wind shear) can be reduced.

A method for reduction of axial power variations of a wind power plant

The present invention relates to a method and a mechanism for adjusting/controlling the pitch of at least one blade (4) of a wind turbine relative to a wind direction parallel (11) to a longitudinal main shaft (1) of the wind turbine, the mechanism comprising a motor for rotating drive wheels (20, 21) in the angle gear around a longitudinal blade shaft (12) via drive wheels of an angle gear The invention also relates to a method and a mechanism for stopping the complete turning of a main shaft of a wind turbine comprising a motor to rotate a drive pinion in an angle gear via a drive wheel, the angle gear being meant to pitch at least one blade around a longitudinal axis

Niels Vilsboll

Papers

A method and a device for adjusting the pitch and stopping the rotation of the blades of a wind turbine

Method and device for adjusting pitch and stopping rotation of blades of wind turbine