The generator of the wind turbine consists mainly of double-feed and direct-drive,in the direct drive generator is driven by the multi-pole generator directly connected with the impeller,thus eliminating the traditional components of the gearbox.Depend on rare earth permanent magnet generator technology,the higher efficiency of the generator,the pole distance more smaller,therefore, permanent magnet direct drive motor has become the future trend of technological development, in the wind turbine,the permeability gradually increase.

2016 global wind turbine installed capacity is 5464.20 million kilowatts, of which the direct drive motor penetration rate of about 35%,per kilowatt installed capacity corresponding to the amount of NdFeB is 0.67kg, calculated by the 2016 global wind turbine NdFeB consumption is 127.5 million tons.According to forecasts,by 2021 the new global wind turbine installed capacity will reach 75 million kilowatts,as a basis,2017-2020 global wind turbine installed capacity of the new annual growth rate will be 6.5%.Assuming 2017-2018 permanent magnet direct drive motor in the wind turbine unit annual growth rate is 1%, then 2017-2018 global wind turbine neodymium iron boron dosage is expected to 139.67 million tons and 152.27 million tons respectively, an increase of 9.54% and 9.46%.