Patent ID: 8292568
Filing Date: 2012-10-23
Classification: F03D,F05B,Y02E

Abstract:
1. A wind turbine generator comprising: blades; a rotor hub to which the blades are fixed; a rotating shaft which is connected to the rotor hub and rotates with the rotor hub; a sensor which is arranged inside the rotor hub and detects a foreign object inside the rotor hub; a brake device which stops rotation of the rotating shaft; and a controller which controls the brake device to stop the rotation of the rotating shaft when the sensor detects the foreign object; wherein the sensor comprises: a contact part which is fixed to an inner wall of the rotor hub so as to be in contact with the foreign object; and a limit switch which is connected to the contact part and is turned on or off by tension being generated when the contact part comes in contact with the foreign object.