电磁流量计励磁线圈优化-中南大学学报.PDF

第 47 卷第 6 期 中南大学学报( 自然科学版) Vol.47 No.6 2016 年 6 月 Journal of Central South University (Science and Technology) June 2016 DOI: 10.11817/j.issn.1672-7207.2016.06.018 电磁流量计励磁线圈优化 张昊，岳士弘，张玉静，王化祥 (天津大学 电气与自动化工程学院，天津，100072) 摘要：从励磁线圈作用场的权重函数出发，按照磁通密度沿中轴线分布的均匀度、沿测量管轴方向分布的均 匀度和整个空间分布的均匀度 3 个指标，确定最佳的励磁线圈形状。在用料以及励磁条件相同的情况下，对 不同形状励磁线圈产生的感应电动势与被测液体的流速以及管道中液面高度的关系进行仿真分析。研究结果 表明：圆形贴管壁的线圈励磁磁场均匀度最佳。实际应用中，要根据被测液体在管道中液面高度的状态选择 最佳的励磁线圈形状。 关键词：电磁流量计；磁场均匀度；线圈优化；磁场强度；权重函数 中图分类号：TH814 文献标志码：A 文章编号：1672−7207(2016)06−1953−06 Optimization of electromagnetic flowmeter excitation coil ZHANG Hao, YUE Shihong, ZHANG Yujing, WANG Huaxiang (School of Electrical Engineering and Automation, Tianjin University, Tianjin 100072, China) Abstract: Magnetic field induced by different shapes of excitation coil was simulated from the angle of the weighting function, three indicators, the magnetic flux density along the central axis of the distribution of evenness, along the measuring tube axis of the distribution uniformity and the uniformity of the distribution in the whole space were defined to analyse their magnetic field uniformity respectively, and then the optimal coil shape was chosen. And in the situation of the same coil material cost and the same excitation condition, the relationship between EMF induced by different shape coils and the measured liquid velocity and the level of liquid in the pipe was simulated. The results show that the circular coil magnetic field uniformity is the best. The selection of the best shape of the exciting coil has been done based on th