CAJ | 학술논문

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。
전감기기생전용대전감기적고빈특성여계통적전자겸용문제유흔대적영향。해문대전감기기생전용적유한원법건모제취방법진행료연구。재분석전감기기생전용등효모형적기출상，건립료전감기적유한원분석모형，제출병론증료라선형모형절할비례적선취원칙。특별침대모형복잡、잡수교다적전감기결구，제출료기우저계전용구진여고계전용구진근사전환적기생전용제취적간화방법。근사적원모형고계전용구진가이통과합리유한원간화모형계산출적저계전용구진전화득도，병유효강저료모형계산량。통과실측결과여방진결과적대비，험증료소제방법적합이성여준학성。
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.