摘要
电感器寄生电容对电感器的高频特性与系统的电磁兼容问题有很大的影响。该文对电感器寄生电容的有限元法建模提取方法进行了研究。在分析电感器寄生电容等效模型的基础上,建立了电感器的有限元分析模型,提出并论证了螺线型模型切割比例的选取原则。特别针对模型复杂、匝数较多的电感器结构,提出了基于低阶电容矩阵与高阶电容矩阵近似转换的寄生电容提取的简化方法。近似的原模型高阶电容矩阵可以通过合理有限元简化模型计算出的低阶电容矩阵转化得到,并有效降低了模型计算量。通过实测结果与仿真结果的对比,验证了所提方法的合理性与准确性。
The stray capacitance of inductors has a great influence on the high frequency characteristics of the inductor and electromagnetic compatibility （EMC） problem of system. In this paper, a method for extraction of stray capacitance of inductors using finite element method （FEM） is studied. Based on the analysis of equivalent circuit of stray capacitance of inductors, a FEM model of inductor is proposed and the principle of split proportion selection for the spiral model is put forward and demonstrated. Especially, a new method for approximating transformation of the capacitance matrix from low-order to high-order is proposed for stray capacitance extraction of inductors with complex structure and more turns. Approximation of the high-order capacitance matrix of the original model can be obtained by transforming the low-order capacitance matrix calculated from a proper FEM simplified model, and the amount of calculation of the model is reduced significantly. The rationality and accuracy of this method is verified by comparing simulated result to measurement result.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第12期3102-3109,共8页
Proceedings of the CSEE
基金
国家863高技术基金项目(2011AA11A265)~~
关键词
螺线型电感器
寄生电容
简化模型
有限元
spiral inductor
stray capacitance
simplifiedmodel
finite element method （FEM）
