Wind turbine generators use special shaped sintered NdFeB magnets in a Halbach array. These special shaped sintered NdFeB magnets are shaped as segments of a hollow cylinder. The length of special shaped sintered NdFeB magnets for a 1 MW generator is 50 mm.

Special shaped sintered NdFeB magnets with a graded composition have improved thermal stability. The maximum energy product of special shaped sintered NdFeB magnets ranges from 33 to 52 MGOe. Special shaped sintered NdFeB magnets with a rounded edge reduce eddy current loss.

A 10‑mm thick special shaped sintered NdFeB magnet can withstand 20,000 g of acceleration. The remanence of special shaped sintered NdFeB magnets is 1.2 to 1.45 Tesla. Special shaped sintered NdFeB magnets with a copper coating are used in seawater applications.

For a direct‑drive generator, special shaped sintered NdFeB magnets are glued into rotor slots. The adhesive for special shaped sintered NdFeB magnets must withstand 120°C continuous. Special shaped sintered NdFeB magnets with a notch provide a glue channel.

The magnetic assembly of special shaped sintered NdFeB magnets uses a fixture to prevent injury. Special shaped sintered NdFeB magnets with a stepped pole reduce torque ripple. The inspection of special shaped sintered NdFeB magnets includes a 3D vision system.

Special shaped sintered NdFeB magnets for offshore wind have a heavy‑duty epoxy coating. The demagnetization curve of special shaped sintered NdFeB magnets is linear up to 150°C. Special shaped sintered NdFeB magnets with a curved bottom match the rotor circumference.