Title :
A mathematical model to study the influence of space charges in a needle-plane-arrangement in a polymer
Author_Institution :
Fachhochschule Giessen-Friedberg, West Germany
Abstract :
In polymeric insulating materials, tree-initiated breakdown is supported by space charge. A mathematical model is developed to study the influence of space charge on the field strength of a needle-plane arrangement. The model examines carrier injection at the metal-polymer contact. The movement of the charge carriers is dependent on field strength, temperature, and carrier mobility. The effects of electrons and holes were neglected. The effectiveness of the method is illustrated by examples of thermally stimulated currents
Keywords :
electric breakdown of solids; polymers; space charge; thermally stimulated currents; carrier injection; carrier mobility; field strength; mathematical model; metal-polymer contact; needle-plane-arrangement; polymer; polymeric insulating materials; space charges; thermally stimulated currents; tree-initiated breakdown; Charge carriers; Current density; Dielectric materials; Electron traps; Mathematical model; Plastic insulation; Polyethylene; Polymers; Space charge; Temperature dependence;
Conference_Titel :
Electrets, 1988. (ISE 6) Proceedings., 6th International Symposium on (IEEE Cat. No.88CH2593-2)
Conference_Location :
Oxford
DOI :
10.1109/ISE.1988.38530
