| 摘要 |
Wind turbine transmission apparatus (8) including at least one planetary transmission stage, operative for providing a continuously variable transmission ratio between a rotational input from a wind-rotor and a rotational output to an electric generator. The variable transmission ratio preferably varies substantially in accordance with the velocity of the wind powering the wind turbine. Preferably, the at least one planetary transmission stage includes a primary planetary stage providing a fixed transmission ratio between the rotational input and a primary rotation, and a secondary planetary stage providing a variable transmission ratio between the primary rotation and the rotational output. <IMAGE> |
