非正弦激励下中频变压器铁损计算方法对比分析  

Comparative Analysis of Core Loss Calculation Methods for Medium Frequency Transformer Under Nonsinusoidal Excitation

作　　者：律方成[1] 郭云翔[1] 

机构地区：[1]华北电力大学输变电设备安全防御河北省重点实验室,保定071003

出　　处：《高电压技术》2017年第3期808-813,共6页High Voltage Engineering

基　　金：国家"十二五"科技支撑计划(2013BAG24B02)~~

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。To accurately calculate the core loss of medium frequency transformer（MFT） under nonsinusoidal excitation, we comparatively study several correction methods based on original steinmetz equation（OSE）. Firstly, the correction methods are comparatively analyzed from the correction principle. Secondly, Square waveform is a typical voltage wave- form for MFT, and triangular waveform is close to the sinusoidal one. Equations of the correction methods for these two voltage waveforms are derived. Finally, measurement system for hysteresis loop of the core is set up, and coefficients of OSE for a nanocrystalline ring core are fitted in the medium frequency range. Thereby, the calculated values of each correction methods are compared with the measured values of the core loss density under square and triangular waveform excitations. It is found that the error of the coefficient Steinmetz equation（WcSE） is the minimum. When calculating the core loss of nanocrystalline in the medium frequency range, WcSE is the most accurate. The research results can provide a reference for the accurate calculation of the core loss of medium frequency transformer at its design and optimization stage.

关 键 词：中频变压器 铁芯损耗 纳米晶 经验公式法 非正弦激励 对比分析 

分 类 号：TM432[电气工程—电器]