2.4 Variable speed direct-drive concept with a full-scale power converter
This configuration may correspond to a variable speed wind turbine with a direct-drive generator connected to the grid through a full-scale power converter. The most important difference between geared drive wind turbines and direct-drive types is the generator rotor speed. The direct-drive generator rotates at a low speed, because the generator rotor is directly connected on the hub of the turbine rotor.