Abstract: A planetary gear system and a pin for coupling a planet gear to a carrier in a planetary gear system are disclosed. The planetary gear system includes a planet gear defining a central planet axis, a carrier disposed adjacent the at least one planet gear, and a pin extending from the carrier through the planet gear generally along the central planet axis. The pin includes a first end, a second end, and an outer surface extending therebetween. The pin further defines an opening extending from the outer surface generally along the central planet axis and at least partially through the pin.

Abstract: A wind turbine and a drivetrain for a generator is provided. The drivetrain includes a hub configured to provide an input rotational speed, and a planetary gearbox in communication with the hub. The planetary gearbox includes a stationary or rotatable carrier and a plurality of planet gears. The planetary gearbox is configured to convert the input rotational speed to an output rotational speed, and includes at least one sun gear. The hub can be rigidly connected to the rotatable ring gear.

Abstract: A drivetrain for a generator in a wind turbine is disclosed. In one embodiment, the drivetrain includes an input shaft configured to provide an input rotational speed, and a planetary gearbox in communication with the input shaft. The planetary gearbox includes a stationary carrier and a plurality of rotatable gears. The planetary gearbox is configured to convert the input rotational speed to an output rotational speed. The drivetrain additionally includes an output shaft in communication with the planetary gearbox. The output shaft is configured to rotate at the output rotational speed. The drivetrain further includes a load isolation device disposed between the input shaft and the planetary gearbox. The load isolation device is configured to reduce transmission to the planetary gearbox of bending loads on the input shaft.

Abstract: A drivetrain for a wind turbine includes a gearbox and a generator. The gear box includes a housing and an output shaft that is rotatably coupled within the housing, wherein the gearbox further includes at least one bearing positioned between the housing and the output shaft. The generator includes a stator coupled to the housing such that the stator is positioned radially outward from the housing, and a rotor coupled to the output shaft such that the rotor is positioned radially inward from the stator.