1、 High magnetic performance: the core advantage of sintered neodymium iron boron magnets in wind turbines
Sintered neodymium iron boron permanent magnet materials have become an indispensable key component in wind turbines due to their excellent high magnetic performance. Its saturation magnetic polarization strength is as high as 1.6T, which makes it outstanding in providing strong magnetic fields, far exceeding other types of permanent magnet materials. In wind turbines, sintered neodymium iron boron magnets with high magnetic performance can ensure that the generator can efficiently convert wind energy into electrical energy even at lower wind speeds, thereby improving overall power generation efficiency. High magnetic performance also means that smaller magnet volumes can generate the same magnetic field strength, which is of great significance for reducing the weight of generators and optimizing structural design. In the field of wind power generation, which requires extremely high material performance, the high magnetic performance of sintered neodymium iron boron magnets has undoubtedly won widespread application and recognition.

2、 High coercivity: a key factor in ensuring stable operation of wind turbines
Coercivity is an important indicator for measuring the ability of permanent magnet materials to resist external magnetic field interference. In wind turbines, high requirements are placed on the coercivity of neodymium iron boron magnetic steel due to the presence of alternating demagnetization fields and the demagnetization field generated by instantaneous high currents when the load suddenly changes. High coercivity sintered neodymium iron boron magnets can maintain stable magnetism under these harsh conditions, avoiding high-temperature demagnetization or magnetic reversal under external magnetic fields, thereby ensuring the stable operation of wind turbines. High coercivity also helps reduce the energy consumption of the generator during start-up and shutdown, improving overall energy utilization efficiency. In the design and manufacturing process of wind turbines, selecting sintered neodymium iron boron magnets with high coercivity is an important measure to ensure stable generator performance and improve power generation efficiency.

3、 Temperature stability: an important guarantee for dealing with harsh working environments
The working environment of wind turbines is quite harsh, and prolonged operation can lead to an increase in motor temperature, which places high demands on the temperature stability of permanent magnet materials. Although the Curie temperature of sintered neodymium iron boron magnets can reach up to 310 ℃, in practical applications, their remanence and coercivity decrease with increasing temperature. The sintered neodymium iron boron magnets used in wind turbines need to have good temperature stability, that is, they can still maintain high remanence and coercivity at higher temperatures. This requires strict control of the composition and process parameters during the manufacturing process of magnets to ensure their good thermal stability and resistance to thermal degradation. At the same time, appropriate heat dissipation measures need to be taken in the design and use of wind turbines to reduce motor temperature and further extend the service life of sintered neodymium iron boron magnets.

4、 Consistency of magnetic properties: the foundation for ensuring stable performance of generators
Large permanent magnet wind turbines typically use thousands of sintered neodymium iron boron magnets, with each magnetic pole of the rotor composed of many magnets. Therefore, the consistency of rotor magnetic poles requires a very high consistency of magnets, including consistency in dimensional tolerances and magnetic properties. The consistency of magnetic performance not only requires small deviations in magnetic properties between different individuals, but also requires uniform magnetic properties of individual magnets. This requires strict control of the manufacturing process and quality of magnets during the production process, including parameters such as raw material purity, ratio, sintering temperature, and time, to ensure that each magnet has the same magnetic properties. During the assembly and debugging process of wind turbines, strict testing and screening of magnets are also required to ensure that the performance indicators of all magnets meet the design requirements. Only in this way can we ensure that the interaction forces between the magnetic poles of the generator are balanced during operation, thereby ensuring stable and efficient performance of the generator.

5、 Corrosion resistance: the key to extending the service life of wind turbines
Sintered neodymium iron boron alloy contains active rare earth elements, which are prone to oxidation and corrosion. In wind turbines, magnets need to be exposed to harsh environments such as high humidity, high salt spray, strong ultraviolet radiation, etc. for a long time, so they must have good corrosion resistance. Common anti-corrosion coatings include electroplated nickel, electroplated zinc, and electrophoretic epoxy resin, which can effectively protect magnets from corrosion and extend their service life. When selecting anti-corrosion coatings, it is necessary to comprehensively consider factors such as corrosion resistance, adhesion, and conductivity of the coating to ensure that the coating does not have a negative impact on the performance of the generator while protecting the magnet. During the use of wind turbines, it is necessary to regularly inspect and maintain the magnets to promptly detect and address corrosion issues, in order to ensure the long-term stable operation of the generator.