摘要 针对Bertotti经典常系数损耗模型中磁滞损耗和杂散损耗计算误差较大的问题,提出了一种改进的Bertotti损耗分离模型。首先在考虑频率无关项2n0V0Bm影响的基础上提出了一种确定磁滞损耗的方法,并结合实验数据将磁滞损耗的计算参数α表示为磁感应强度峰值Bm的多项式函数;其次考虑了统计特征参数n0、V0为常数时对杂散损耗的影响,并用多项式函数来拟合杂散损耗计算式中的斜率k以减小频率大于200 Hz时的误差;最后分别应用改进的损耗模型与经典常系数损耗模型对不同磁感应强度下取向硅钢片的损耗特性进行了模拟研究,并将模拟结果与实验结果进行对比分析。结果表明,改进的Bertotti损耗模型提高了铁心损耗的模拟精度,对变压器的损耗预测及优化设计提供了必要的数据支持。 For the large calculation errors of hysteresis loss and stray loss in Bertotti classical constant coefficient loss model,an improved Bertotti loss separation model is proposed.based on the classic Bertotti loss separation model,a method to determine the hysteresis loss is first proposed based on the influence of the frequency-independent term 2n0V0Bm,and combined with the experimental data,the calculation parameterαof the hysteresis loss is expressed as a polynomial function of the peak magnetic induction intensity Bm.Secondly,the influence of the statistical characteristic parameters n0 and V0 on the stray loss is considered,and a polynomial function is used to fit the slope k in the stray loss calculation formula to reduce the error when the frequency is greater than 200 Hz.Finally,the improved loss model and the classic constant coefficient loss model are used to simulate the loss characteristics of oriented silicon steel sheets under different magnetic induction intensities,and the simulation results are compared with the experimental results.The results show that the improved Bertotti loss model improves the simulation accuracy of core loss,verifies the practicability and accuracy of the improved model.And it provides necessary data support for transformer loss prediction and optimization design.
机构地区 郑州轻工业大学建筑环境工程学院
出处 《实验室研究与探索》 CAS 北大核心 2021年第4期19-23,共5页 Research and Exploration In Laboratory
基金 国家自然科学基金项目(51607157) 郑州轻工业大学博士科研基金项目(2015-BSJJ012)。
