非正弦激励下中频变压器铁损计算方法对比分析

发布时间：2018-06-01 14:24

本文选题：中频变压器 + 铁芯损耗　；参考：《高电压技术》2017年03期

【摘要】：为了对非正弦激励下中频变压器(MFT)的铁芯损耗进行准确的计算,对比了几种基于原始Steinmetz公式(OSE)的铁损计算修正方法。首先,从修正原理上对上述修正方法进行了对比分析;其次,针对典型的中频变压器端口电压方波波形,并参考三角波电压激励,推导了上述修正方法在这两种波形下的铁损计算式;然后通过搭建铁芯磁滞回线测量系统,对一纳米晶磁环铁芯在中频范围内的原始Steinmetz经验公式系数进行了拟合,并对比了铁芯方波与三角波激励下铁损密度实测值和各修正方法解析计算值。结果表明:Steinmetz波形系数公式(Wc SE)的误差最小,对纳米晶铁芯在中频非正弦激励下进行损耗计算,应用Wc SE最为准确。研究结果可为中频变压器在设计与优化阶段铁芯损耗的准确计算提供参考。
[Abstract]:In order to accurately calculate the core loss of intermediate frequency transformer (MFTs) under non-sinusoidal excitation, several methods of iron loss correction based on the original Steinmetz formula are compared. First of all, the correction method is compared and analyzed from the principle of correction. Secondly, aiming at the typical if transformer port voltage square wave waveform, and referring to the voltage excitation of triangular wave, The calculation formula of iron loss under these two waveforms is derived, and the original Steinmetz empirical formula coefficients of a nanocrystalline magnetic ring iron core in the intermediate frequency range are fitted by setting up a hysteresis loop measurement system. The measured values of iron loss density under the excitation of square and triangular waves of iron core and the analytical calculation values of each modified method are compared. The results show that the error of W _ (SE) is the least, and the loss calculation of nanocrystalline iron core under medium frequency non-sinusoidal excitation is the most accurate. The results can provide a reference for the accurate calculation of core loss in the design and optimization stage of intermediate frequency transformer.
【作者单位】：华北电力大学输变电设备安全防御河北省重点实验室;
【基金】：国家“十二五”科技支撑计划(2013BAG24B02)~~
【分类号】：TM432

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