Patent ID: 9624908
Date: 2017-04-18
CPC Classifications: F03D,F05B,H02K,Y02E

Claim:
1. An airflow control arrangement for a direct-drive wind-turbine, the direct-drive wind-turbine having a generator and an outer rotor free to rotate about an inner stator, the airflow control arrangement comprising: an outflow fan arranged to draw an exit airflow through an exit duct, wherein the exit duct extends from an interior cavity of the inner stator to an environment that is exterior to the wind-turbine; and an exit flow arrangement that includes a plurality of hatches, the plurality of hatches including a first hatch for regulating the exit airflow to the environment exterior to the wind turbine and a second hatch for regulating the exit airflow into an interior region of a canopy of the direct-drive wind-turbine.