Patent ID: 11885304
Assignee: NABTESCO CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 16:
17. A driving method performed by a wind turbine system, the driving method comprising the steps of:
generating a braking force for inhibiting rotation of a ring gear meshing with a pinion gear;
acquiring an external load applied to the ring gear;
determining a wind direction deflection based on a wind direction sensed by a wind sensor, and outputting a turn instruction to rotate the ring gear based on the determined wind direction deflection, and
switching the ring gear from a stationary state to a rotating state based on the turn instruction,
in switching the ring gear from the stationary state to the rotating state, releasing the braking force when a rotational torque generated on the ring gear by a yaw drive unit rotating the pinion gear has been larger than the external load, and switching the ring gear to a rotating state with the rotational torque by the yaw drive unit larger than the external load.