Monte-Bianco Magnets Co., Ltd.
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Wind Generator Magnet Arc Shape NdFeB Motor Magnet Customized
Large permanent magnet wind turbines typically use thousands of neodymium magnets. Each pole of the rotor contains many magnets. The consistency of rotor magnetic poles requires the consistency of magnets, including dimensional tolerances and consistency of magnetic properties. The so-called consistency of magnetic properties includes: the deviation of magnetic properties between different individuals should be small, and the magnetic properties of individual magnets should be uniform.
Neodymium iron boron alloy contains active rare earth elements and requires a coating to prevent surface corrosion. Common anti-corrosion coatings are nickel plating, zinc plating, and electrophoretic epoxy resin. Surface phosphating treatment can prevent neodymium iron boron from rusting for a short period of time in a relatively dry environment.
Max Operating Temperature
| grade | Max Operating Temperature | grade | Max Operating Temperature |
| N30-N54 | 80℃(176℉) | N30UH-N45UH | 180℃(356℉) |
| N30M-N52M | 100℃(212℉) | N30EH-N38EH | 200℃(392℉) |
| N30H-N52H | 120℃(248℉) | N32AH | 220℃(428℉) |
| N30SH-N45SH | 150℃(302℉) |
The design life of wind turbines is 20 years, which means that electromagnetic steel needs to be used for 20 years. Its magnetic properties have not significantly decreased, and the electromagnetic steel has not undergone significant corrosion.
