Wind-driven generator magnetic powder brake system

The utility model relates to a wind-driven generator magnetic powder brake system which comprises a controller, a power conversion module, a digital anemometer, a rotation speed signal module, a driving module, a wind-driven generator shaft and a magnetic powder brake. Magnetic powder is taken as a medium; through the controller which takes a single chip element as a core, the output braking torque of the magnetic powder brake is controlled, and stepless slow-down braking is carried out on the wind-driven generator shaft; and when the environmental air speed is less than an upper-limit air speed, the wind driven generator still can generate power in the braking process. The wind-driven generator magnetic powder brake system has the advantages of improving the generating efficiency of the wind-driven generators, decreasing the energy waste, being small in impact force, recyclable in friction material, long in service life, safe and stable, providing a new braking manner for the wind-driven generators and broadening the braking manner of the wind-driven generators.