Neodymium magnets are widely used in the system of MW-grade Motor or Generator’s magnetic rotor, but they are easily damaged which will stick to the surface between magnet and yoke, and increase the gap distance. Thus, a pole shoe made of the same or similar magnetic material is needed with the yoke.
Stanford Magnets can help you to design and provide this kind of magnetic modules for wind powder.
Some examples: Low Speed Direct Drive Turbine High Speed Wind Turbine Off-shore Wind Turbine