无取向电工钢损耗浅析

A Research into Iron Loss of Non-oriented Electric Steel

结合铁芯损耗研究的历史,对无取向电工钢损耗(10Hz^1kHz)进行了测量,并应用两种物理模型对总损耗进行了分离。Brailsford模型对总损耗的拟合比较准确,在整个频率范围内存在-1.2%~2.5%的偏差。另一种常规的三段式损耗分离中,工频下磁滞损耗占71.1%,涡流损耗占21.1%,且随频率增加分别呈衰减和升高趋势,反常涡流损耗占总损耗的百分比先是随频率缓慢升高,在200Hz以后几乎不随频率而改变。

Iron loss of non-oriented electric steel was measured at the frequency ranging between 10Hz to 1 kHz, and loss separations were conducted by means of two physical models. Brailsford model fits well with the results of total iron loss, with the standard deviation of -1.2～2. 5% within the whole frequency range. In the ease of the other physical model, the percentage of hysteresis loss and eddy loss decreases and increases respectively with increasing of frequency. The percentage of abnormal eddy loss scarcely varies as frequency reaches up to 200Hz.