Time-domain analysis of quasistatic electric fields in media with frequency-dependent permittivity

被引：7
|
作者：
Preis, K [1 ]
Bíró, O
Supancic, P
Ticar, I
Matzenauer, G
机构：
[1] Graz Tech Univ, Inst Fundamentals & Theory Elect Engn, IGTE, A-8010 Graz, Austria
[2] Univ Min & Met Leoben, Inst Struktur & Funkt Keram, A-8700 Leoben, Austria
[3] Mat Ctr Leoben, A-8700 Leoben, Austria
[4] Univ Maribor, Fac Elect Engn & Comp Sci, SLO-2000 Maribor, Slovenia
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2004年 / 40卷 / 02期
关键词：
finite-element calculations; frequency-dependent permittivity; time-dependent electric fields; transient analysis;
D O I：
10.1109/TMAG.2004.825455
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A time-domain method is presented to treat transient quasistatic electric problems if the permittivity depends on frequency. The inverse Fourier transform of the complex permittivity spectrum is used in a time-stepping procedure. The method is numerically realized using finite-element techniques. The approach is validated by assuming a frequency dependence having an analytical inverse transform. Thus, the frequency dependence of the permittivity of a real electroceramic material is determined from measurement results by curve fitting. An example using this curve illustrates the effect of the frequency dependence of permittivity on the time-domain solution.
引用
收藏
页码：1302 / 1305
页数：4
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