永磁材料的性能对室温磁制冷机中磁化场的影响

Influence of Permanent Magnetic Material Performances on Magnetic Field for Room-Temperature Magnetic Refrigerators

摘要:

在磁路结构相同的情况下，计算了体积、形状相同，但性能不同的NdFeB永磁材料所对应的气隙相同的磁路的场强分布，并比较了它们的场强大小，分析了影响场强的因素。表明在设计磁制冷永磁磁化场时，不必一味追求高磁能积材料，要综合考虑永磁材料的磁能积、矫顽力、剩磁等性能，从而为室温磁制冷机中磁化场的建立提供选材依据。

Abstract:

The field strength distribution of the magnetic circuit vs the NdFeB permanents was calculated in the condition of the same magnetic structure. The permanents were possessed of the same volumes and configurations, but different performaces, and there was the same width of air-gap in the magnetic circuit. Their field strength magnitudes were compared and the factors of influence on magnetic field strength were analyzed . According the results it is necessary comprehensively to consider magnetic-energy-product, coercive force, remanence etc rather than to emphasize the materials with high magnetic-energy-product upon designing the permanent magnetic field for magnetic refrigeration so as to provide the proper basis for selecting materials in designing the magnetic field for room-temperature magnetic refrigirators.