摘要
在区间100Hz≤f≤2500Hz和0.1T≤B_m≤1.0T内,考查了五种铁基纳米晶软磁合金的三种原始磁状态的每周铁损的频率关系。测量和计算结果表明,在大约低于3～5kHz(视磁状态和B_m值而定)的范围内,每周总铁损呈现明显的非线性行为。根据以前报道,将总铁损分离为磁滞损耗、经典涡流损耗和过剩损耗之和,证实了非线性行为取决于过剩损耗的频率关系。本文指出了,每周过剩损耗对频率的变化率在大约低于3～5kHz的范围内,随频率增加急剧减小,在这个范围以上,变化率缓慢地改变,从而导致了每周总损耗的准线性行为。本文给出了一些在宽中频段内每周总损耗的线性表达式,可用来粗略估计总损耗。
The dependence of the power loss per cycle on frequency has been investigated in the ranges of 100Hz≤f≤2500Hz and 0.1T≤Bm≤g 1.0T for three main original magnetic states in five sorts of Fe - based nanocrystalline soft magnetic alloys. The measured and calculated results have shown that the total power loss per cycle clearly exhibits a nonlinear behavior in the range below 3kHZ - 5kHz depending on both the magnetic state and the value of Bm, whereas it shows a quasi - linear behavior above this range. The total loss was decomposed into hysteresis loss, classical eddy current loss and excess loss, the obvious non - linear behavior has been confirmed to be completely determined by the dependence of the excess loss on frequency. It has been indicated that the change rate of the excess loss per cycle with respect to frequency sharp decreases with increasing frequency in the range below about 3kHz - 5kHz, wherease the rate of change slowly varies above this range, thus leading to the quasi - linear behavior of the total loss per cycle. In this paper, some linear expressions of the total loss per cycle have been given in a wider medium - frequency segment, which can be used for roughly estimating the total loss.
出处
《上海钢研》
1999年第5期3-9,共7页
Journal of Shanghai Iron and Steel Research
关键词
纳米晶
软磁合金
铁损
中频
铁基
nanocrystalline soft magnetic alloy core loss medium - frequency
