Title :
Carrier jumping over a potential barrier at the interface of LDPE laminated dielectrics
Author :
Tanaka, T. ; Ito, T. ; Tanaka, Y. ; Takada, T.
Author_Institution :
Central Res. Inst. of Electr. Power Ind., Tokyo, Japan
Abstract :
Space charge is formed in an interfacial region of LDPE laminated EVA dielectrics, when they are subjected to dc voltage. A modified Maxwell-Wagner model is proposed to analyze such an interfacial space charge distribution. Ionic charge might be predominant rather than electronic charge. Positive charge is more predominant than negative charge in this dielectric system. Ionic charge carriers in EVA jump over a potential barrier to form a charge distribution at the dielectric interface. It is confirmed that its peak penetrates into LDPE, and it may be drawn via the electric force
Keywords :
polyethylene insulation; polymer blends; space charge; EVA; LDPE laminated dielectrics; carrier jumping; interfacial region; interfacial space charge distribution; modified Maxwell-Wagner model; potential barrier; space charge; Cable insulation; Charge carriers; Charge measurement; Conductivity; Counting circuits; Current measurement; Dielectric measurements; Dielectrics and electrical insulation; Space charge; Voltage;
Conference_Titel :
Electrical Insulation, 2000. Conference Record of the 2000 IEEE International Symposium on
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-5931-3
DOI :
10.1109/ELINSL.2000.845416
