Simulation of unipolar space charge controlled electric fields

被引:15
作者
Christen, Thomas [1 ]
Seeger, Martin [1 ]
机构
[1] ABB Schweiz AG, Corp Res, CH-5405 Baden, Switzerland
关键词
insulators; space charge limited currents; electric field simulation; surface charging; finite element method;
D O I
10.1016/j.elstat.2006.05.004
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 model is discussed, which allows in an easy way to perform electric field simulations in unipolar space charge controlled dielectric media with the finite element method. The approach is appropriate for a variety of different devices in electrical engineering, containing solid, liquid, or gaseous insulators. The main issue concerns the boundary condition at the charge injecting contacts, including ohmic contacts (leading to space charge limited currents) as well as contacts with a finite threshold field for injection (e.g., by Corona onset in gas). The model naturally contains the high-current limit, where the current is injection dominated, i.e., given by the saturation current of the contact, and the capacitive field is restored. Results for a few examples are presented, in order to validate the method by comparison with analytical results, and in order to illustrate its usefulness for applications. In particular, for gaseous insulation various steady state and transient field distributions are calculated. With this approach it is easily possible to investigate the effect of convective currents as well as the charging of dielectrics surfaces. (C) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:11 / 20
页数:10
相关论文
共 18 条
[1]  
ADIROVICH EI, 1961, SOV PHYS-SOL STATE, V2, P1282
[2]   Charge injection versus space-charge-limited current in organic light-emitting diodes [J].
Arkhipov, VI ;
von Seggern, H ;
Emelianova, EV .
APPLIED PHYSICS LETTERS, 2003, 83 (24) :5074-5076
[3]  
BOGGS SA, 1995, T POWER DELIVERY, V10, P1270
[4]   Charge-injection instability in perfect insulators [J].
Christen, T .
PHYSICAL REVIEW B, 1997, 56 (07) :3772-3778
[5]   Charge injection instability [J].
Christen, T .
PROCEEDINGS OF THE 1998 IEEE INTERNATIONAL CONFERENCE ON CONDUCTION AND BREAKDOWN IN SOLID DIELECTRICS - ICSD '98, 1998, :69-72
[6]  
CHRISTEN T, IN PRESS J PHYS D
[7]   Corona charging of polymers: Recent advances on constant current charging [J].
Giacometti, JA ;
Fedosov, S ;
Costa, MM .
BRAZILIAN JOURNAL OF PHYSICS, 1999, 29 (02) :269-279
[8]   DIRECT MEASUREMENT OF SPACE-CHARGE INJECTION FROM A NEEDLE ELECTRODE INTO DIELECTRICS [J].
HIBMA, T ;
ZELLER, HR .
JOURNAL OF APPLIED PHYSICS, 1986, 59 (05) :1614-1620
[9]  
HINRICHS CH, 2001, WILEY ENCY ELECT ELE, V3, P79
[10]  
Hwang W., 1981, Electrical transport in solids