国内外30Q105取向硅钢多工况磁性能对比研究

Comparative Study on Magnetic Properties of 30Q105 Grain-Oriented Silicon Steels under Multiple Load Cases at Home and Abroad

检测了正弦波形磁场激励下国产和进口同等规格取向硅钢(30Q105)产品的磁性能,同时检测了其在谐波及直流偏磁电网复杂工况下的损耗。结果表明,正弦波形磁场激励下国产产品的铁损P1.7/50比进口产品的低0.03 W/kg;直流偏磁存在时,或三次、五次谐波与直流偏磁同时存在时,国产硅钢片的损耗不同程度高于进口材料。采用金相分析、电子背散射衍射及X射线衍射技术,对造成国内外同等规格取向硅钢材料,在标准正弦波形磁场激励与电网复杂工况下,损耗不一致的原因进行了分析,结果显示,取向硅钢材料内部组织不均匀性及{110}<112>黄铜取向晶粒的存在是造成上述差异的重要原因。

The magnetic properties of 30Q105 grain-oriented silicon steels at home and abroad w ere tested under invigorative magnetic field of sine w ave,as w ell as the core loss under pow er grid complicated conditions w ith DC bias and harmonic w ave. The results show that,the core loss（ P1. 7 /50） of domestic sample is lower than that of imported sample by0. 03 W / kg under sine w ave magnetic field. How ever,the core loss of domestic grain-oriented silicon steel is higher than that of imported sample by different degrees under DC bias or third,fifth harmonic w ave w ith DC bias. The reasons for core loss diversity of the same grade 30Q105 grain oriented silicon steels at home and abroad under different w orking conditions w ere analyzed by optical microscope,electron back scattered diffraction,and X-ray diffraction technique. The results show that,the above differences are attributed to the inhomogeneity in grain size distribution and the existence of { 110} 112 Brass orientation grains.