Rare earth magnetic steel of wind driven generator and manufacturing method of rare earth magnetic steel

Abstract

The invention relates to the technical field of magnet preparation, and discloses a rare earth magnetic steel of a wind driven generator and a manufacturing method thereof, and the manufacturing method is characterized in that a first neodymium iron boron magnet and a second neodymium iron boron magnet are bonded through a bonding layer to form the rare earth magnetic steel of the wind driven generator, so that the skin effect of the magnetic steel is effectively avoided, and the magnetic steel has high reliability. The first neodymium-iron-boron magnet and the second neodymium-iron-boron magnet which are thin are bonded through the bonding layer, the conductivity of the rare earth magnetic steel of the wind driven generator can be reduced, the eddy current effect of the magnetic steel is reduced, the service life of a motor can be effectively prolonged, and the service life of the motor is prolonged. In addition, the thickness of the first neodymium iron boron prefabricated magnet and the thickness of the second neodymium iron boron prefabricated magnet are small, so that the use amount of heavy rare earth does not need to be increased to solve the problem of uneven distribution of the heavy rare earth of the magnetic steel, the use amount of the heavy rare earth Tb and the heavy rare earth Dy is effectively reduced, and expensive rare earth resources are saved.

Description

technical field [0001] The invention relates to the technical field of magnet preparation, in particular to a wind power generator rare earth magnet and a manufacturing method thereof. Background technique [0002] At present, wind power generation is becoming an upsurge in the world, because wind power generation does not need to use fuel, nor will it produce radiation or air pollution, and it is a clean energy source. [0003] Wind power generation converts the kinetic energy of the wind into mechanical kinetic energy, and then converts the mechanical energy into electrical kinetic energy. The preparation of wind power generators requires the use of a large amount of rare earth permanent magnets, and the volume of the magnets is relatively large. And because wind turbines need to deal with harsh environments such as wind and sun, lightning, and cold and heat shocks, higher requirements are placed on the anti-demagnetization performance (intrinsic coercive force) of rare e...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the problem that the existing grain boundary diffusion cannot be applied to the thicker magnet steel, because the thicker the magnet steel is, it is difficult for the heavy rare earth to penetrate into the center of the magnet steel completely, and the closer the magnet steel is The less the amount of heavy rare earth in the center, that is, the uneven distribution of heavy rare earth in the magnet, resulting in uneven performance of the magnet, which leads to the skin effect of the wind turbine using the magnet

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