Numerical modelling of needle-grid electrodes for negative surface corona charging system
Zhuang, Yuan, Chen, George and Rotaru, Mihai (2011) Numerical modelling of needle-grid electrodes for negative surface corona charging system. Journal of Physics: Conference Series, 310, 012011.
Surface potential decay measurement is a simple and low cost tool to examine electrical properties of insulation materials. During the corona charging stage, a needle-grid electrodes system is often used to achieve uniform charge distribution on the surface of the sample. In this paper, a model using COMSOL Multiphysics has been developed to simulate the gas discharge. A well-known hydrodynamic drift-diffusion model was used. The model consists of a set of continuity equations accounting for the movement, generation and loss of charge carriers (electrons, positive and negative ions) coupled with Poisson’s equation to take into account the effect of space and surface charges on the electric field. Four models with the grid electrode in different positions and several mesh sizes are compared with a model that only has the needle electrode. The results for impulse current and surface charge density on the sample clearly show the effect of the extra grid electrode with various positions.
|Divisions:||Faculty of Physical and Applied Science > Electronics and Computer Science
Faculty of Physical and Applied Science > Electronics and Computer Science > EEE
|Date Deposited:||16 Aug 2011 08:38|
|Last Modified:||02 Mar 2012 14:06|
|Contributors:||Zhuang, Yuan (Author)
Chen, George (Author)
Rotaru, Mihai (Author)
|Date:||12 August 2011|
|Publisher:||IoP Publishing Ltd|
|Further Information:||Google Scholar|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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