The effect of charge recombination on surface potential decay crossover characteristics of LDPE

Daomin Min, Shengtao Li, Guochang Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Bipolar charge injection and transport has been observed in corona charged low density polyethylene (LDPE) during surface potential decay (SPD) processes. The proposed bipolar charge transport (BCT) model can well interpret the SPD characteristics, especially the SPD crossover phenomenon. Bipolar charge transport in materials can result in charge recombination (CR). It is evident that CR can affect space charge distributions and external current of insulators subjected to electrical stresses. Therefore, it is of interest to investigate the influence of CR on the SPD and crossover behaviors of charged insulating materials. We deal with the SPD properties of corona charged LDPE by the BCT model with a constant charge carrier mobility, including charge trapping/detrapping and CR. The non-linear charge advection-reaction equation in the BCT model is solved by a highly stable and accurate finite difference weighted essentially non-oscillatory (WENO) method with the Strang splitting method. The Poisson's equation is resolved by boundary element method (BEM). The simulation outputs show that the recombination coefficients can affect the space charge and electric field profiles, and recombination rate in the corona charged material. We find that the larger the recombination coefficients are, the higher the threshold initial surface potential for SPD crossover will be.

Original languageEnglish
Title of host publicationProceedings of the International Symposium on Electrical Insulating Materials
PublisherInstitute of Electrical Engineers of Japan
Pages104-107
Number of pages4
ISBN (Print)9784886860866
DOIs
Publication statusPublished - 2014
Externally publishedYes
Event2014 International Symposium on Electrical Insulating Materials, ISEIM 2014 - Niigata, Japan
Duration: 2014 Jun 12014 Jun 5

Other

Other2014 International Symposium on Electrical Insulating Materials, ISEIM 2014
CountryJapan
CityNiigata
Period14/6/114/6/5

Keywords

  • bipolar charge transport
  • crossover phenomenon
  • LDPE
  • surface potential decay
  • WENO

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Min, D., Li, S., & Li, G. (2014). The effect of charge recombination on surface potential decay crossover characteristics of LDPE. In Proceedings of the International Symposium on Electrical Insulating Materials (pp. 104-107). [6870731] Institute of Electrical Engineers of Japan. https://doi.org/10.1109/ISEIM.2014.6870731