基于FDTD的电气火花电磁场分析
首发时间:2013-05-30
摘要:在电磁环境复杂的工作环境中,电气火花产生的强瞬态空间电磁场会产生电磁耦合干扰操作设备,为了抑制瞬态电磁干扰,需对开关火花瞬态电磁场的频域和时域特性进行分析研究,从而更好的进行屏蔽。由于瞬态高频电磁场的复杂性,求解析解有一定的局限性,数值解可以发挥较为广泛的应用。本文介绍了FDTD法基本原理、基本方程、稳定条件,采用了各种异性完全匹配层(UPML)作为边界吸收条件,应用强迫法设置激励源,在Matlab环境下建立了电气火花电磁场数值模型。
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Analysis of electromagnetic field for electrical spark by FDTD
Abstract:In the complicated electromagnetic environment, transient electromagnetic field caused by electric spark generates interferes to equipment. In order to suppress and shield the transient electromagnetic interference, it is necessary to analyze the time domain and frequency domain characteristics of transient electromagnetic field of spark. Because of the complexity of the transient high frequency electromagnetic field, the analytical solution has certain limitations, so FDTD (the numerical solution ) was used for analysis. In the analysis, UPML were introduced as absorbing boundary conditions. By matlab tool, numerical model was established for the electric spark.
Keywords: electrical engineering electromagnetic field electric spark
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