System and assembly for power transmission and generation in a wind turbine

An integrated power generation assembly in a wind turbine, the wind turbine including a nacelle and a rotor head, the power generation assembly comprising:

• a transmission having a co-axial input and output, the transmission further having a planetary and/or power-splitting gear-train coupling the input and output;
• a generator having an input coupled to the transmission output, the generator input co-axial with the transmission input and output;
• a bearing axially and radially supporting the transmission output, and further radially supporting the generator input;
• and
• a pitch control tube along the axis of the transmission input/output and generator input, the pitch control tube traversing from the transmission input through the generator, the pitch control tube configured to house wires or hydraulic lines from the nacelle to the rotor head.

A power generation system for a wind turbine having rotor blades comprising:

• a planetary transmission having a housing and a plurality of rotating gears located within the housing, the transmission further including an input axially aligned with an output, the output having an output shaft and a sun gear, the input and output coupled through the plurality of gears, and a locating-type roller bearing configured to support the output shaft;
• an alternator having a rotor coupled to the transmission output, the alternator having a bearing for supporting the rotor at a rear section of the alternator, and where the rotor is further supported by the locating-type_roller bearing;
• a pitch control tube positioned around a central rotating axis inside the center of the planetary transmission and the alternator, the pitch control tube configured to house conduits configured to adjust the position of the rotor blades;
• and
• a rotor support member coupled to the alternator for supporting the alternator rotor when disassembled from the transmission while still allowing some rotation of the rotor.