Acoustic Noise Characteristics and Magnetostriction of Fe-Si Powder Cores
Acoustic Noise Characteristics and Magnetostriction of Fe-Si Powder Cores
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DOI：
10.1109/tmag.2011.2173563
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发表时间：
2012-03
影响因子：
2.1
通讯作者：
P. Jang;G. Choi
中科院分区：
文献类型：
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作者：
P. Jang;G. Choi
Fe-Si粉末压制铁芯已被广泛用作光伏应用和电动车辆的粉末调节系统（PCS）中的反应器。当PCS安装在室内时，减少反应器的噪声非常重要。本文研究了Fe-Si粉芯的磁致伸缩特性及其与电抗器噪声的关系。线圈中的虚拟计，无感缠绕，有助于消除应变下磁芯热膨胀的影响。磁致伸缩随Fe-Si芯的机械强度而变化，这取决于浸渍条件。在18 kA/m的最大磁场下，样品的磁致伸缩为几ppm。具有较低机械强度的Fe-Si芯表现出较低的磁致伸缩，从而表现出较低的声学噪声。在矩形反应器中，由于麦克斯韦力引起的应变远大于磁致伸缩引起的应变。
Fe-Si powder compressed cores have been widely used as reactors in the powder conditioning systems (PCS) of photovoltaic applications and electrical vehicles. Reduction of acoustic noise from the reactor is important when the PCS is installed indoors. In this paper, magnetostriction of the Fe-Si powder cores was investigated in connection with acoustic noise from the reactors assembled with Fe-Si cores. A dummy gage in the coil, wound noninductively, is useful in eliminating the contribution of thermal expansion of cores under strain. Magnetostriction varied with the mechanical strength of the Fe-Si core, which is dependent on the conditions of impregnation. Magnetostriction of the cores was several ppm under the maximum field of 18 kA/m. The Fe-Si cores with lower mechanical strength show lower magnetostriction and thus lower acoustic noise. Strain due to Maxwell force is much larger than that of magnetostriction in the rectangular-type reactor.