高频PWM波激励下纳米晶磁环动态磁滞和损耗特性模拟  

Simulation of Dynamic Hysteresis and Loss Characteristics of Nanocrystal Ring Core Under High-frequency PWM Excitations

作　　者：徐永生 傅明利 赵小军[2] 章轩源 武欣怡 XU Yongsheng;FU Mingli;ZHAO Xiaojun;ZHANG Xuanyuan;WU Xinyi(Southern Power Grid Research Institute Co.,Ltd.,Guangzhou 510080,China;Department of Electrical Engineering,North China Electric Power University,Baoding 071003,China;State Grid Shanghai Shibei Electric Power Supply Company,Shanghai 200040,China)

机构地区：[1]南方电网科学研究院有限责任公司,广州510080 [2]华北电力大学电力工程系,保定071003 [3]国网上海市电力公司市北供电公司,上海200040

出　　处：《高电压技术》2024年第10期4419-4428,共10页High Voltage Engineering

基　　金：国家自然科学基金(521770066)。

摘　　要：为了对高频变压器设计规划提供更为准确的参考,该文提出了一种适用于模拟高频脉冲宽度调制波形(pulse width modulation wave,PWM)激励下纳米晶磁环磁滞特性的动态磁滞模型。首先,基于静态同心磁滞回环簇构建逆Everett函数,实现了通过Preisach模型准确计算静态磁滞损耗及其对应的磁场强度;然后,基于正弦激励下与PWM波激励下的涡流损耗与其对应的涡流场回线所围面积在比值上的一致性,通过对正弦激励下的考虑趋肤效应获得的涡流场表达式进行等效折算,最终获得了PWM波激励下的涡流场表达式,拓宽了正弦激励下涡流场表达式的应用范围。模拟结果显示:所提算法能准确拟合纳米晶材料的磁滞特性且损耗误差均在10%以内。进一步讨论了高频PWM波激励下异常损耗统计参数V与占空比D、频率f的关系,总结了高频PWM波激励下异常损耗对各相关参数的变化趋势,为纳米晶材料在高频PWM波下的应用场景提供了参考。最后,通过将模拟结果与实验测量数据对比,验证了所提出的动态磁滞模型的准确性。In order to provide more accurate reference for the design planning of high-frequency transformers,this paper presents a dynamic hysteresis model suitable for simulating the nanocrystalline magnetic ring hysteresis characteristics under the pulse width modulation(PWM)wave excitation.Firstly,an inverted Everett function was devised based on the static concentric hysteresis loops to realize the precise simulation of static hysteresis loss and its associated magnetic field using the Preisach model.Subsequently,based on the consistency of the ratio between the eddy current loss under sinusoidal excitation and that under PWM excitation,by equivalent conversion of the eddy current field expression obtained from the sinusoidal excitation considering the skin effect,the eddy current field expression under the PWM wave excitation was finally obtained,broadening the application range of the eddy current field expression under the sinusoidal excitation.The vortex field expression under PWM wave excitation is obtained by equivalent conversion of the vortex field expression obtained by considering the skinning effect under sinusoidal excitation,which broadens the scope of application of the vortex field expression under sinusoidal excitation.The simulation results show that the proposed model can accurately fit the hysteresis loops and the loss errors of nanocrystalline materials are all within 10%.Further,the relationship between the statistical parameter V of the anomalous loss and the duty cycle D and frequency f under high-frequency PWM wave excitation is discussed,and the trend of the anomalous loss on each relevant parameter under high-frequency PWM wave excitation is summarized,which provides a reference to the application scenarios of nanocrystalline materials under high-frequency PWM waves.Finally,the accuracy of the proposed dynamic hysteresis model is verified by comparing the simulation results with the experimentally measured data.

关 键 词：高频PWM波激励 纳米晶材料 趋肤效应 占空比 损耗分离 

分 类 号：TM41[电气工程—电器]