Wind Turbine Design

Other Keywords Popular 23-07-2019:

✵ bmx bike drawings ✵ irish tattoo ✵ kate moss drugs before and after ✵ future water cities

Latest queries:

✵ tenth doctor outfit ✵ exo disneyland xiumin ✵ calendar 2019 april ✵ alex weinstein ✵ zendaya spandex ✵ tribal wings drawings ✵ black butler lizzy outfits ✵ talakaveri ✵ pretty pictures of hearts and flowers ✵ xbox one vs xbox 360 controller ✵ shrek png ✵ industrial revolution communication ✵ simple kitchen drawing ✵ evander holyfield ear ✵ katy perry elmo gif

Wind Turbine Design

Wiki info

Large three-bladed horizontal-axis wind turbines (HAWT) with the blades upwind of the tower produce the overwhelming majority of wind power in the world today. These turbines have the main rotor shaft and electrical generator at the top of a tower, and must be pointed into the wind. Small turbines are pointed by a simple wind vane, while large turbines generally use a wind sensor coupled with a yaw system. Most have a gearbox, which turns the slow rotation of the blades into a quicker rotation that is more suitable to drive an electrical generator. Some turbines use a different type of generator suited to slower rotational speed input. These don't need a gearbox, and are called direct-drive, meaning they couple the rotor directly to the generator with no gearbox in between. While permanent magnet direct-drive generators can be more costly due to the rare earth materials required, these gearless turbines are sometimes preferred over gearbox generators because they "eliminate the gear-speed increaser, which is susceptible to significant accumulated fatigue torque loading, related reliability issues, and maintenance costs. " There is also the pseudo direct drive mechanism, which has some advantages over the permanent magnet direct drive mechanism.