常量(计算机编程)
介电常数
电导率
有限元法
时间常数
热传导
机械
放松(心理学)
材料科学
电极
瞬态(计算机编程)
粒子(生态学)
电介质
物理
电气工程
复合材料
工程类
计算机科学
热力学
光电子学
地质学
操作系统
海洋学
社会心理学
量子力学
程序设计语言
心理学
作者
Deying Yu,G.S.P. Castle,K. Adamiak
出处
期刊:IEEE Transactions on Industry Applications
[Institute of Electrical and Electronics Engineers]
日期:2010-01-01
卷期号:46 (3): 1159-1165
被引量:8
标识
DOI:10.1109/tia.2010.2045324
摘要
Despite the common belief that, in the process of induction charging, the actual charging time constant and the material-based relaxation time constant are equal, there is no proof that these parameters are related at all. The purpose of this paper is to determine the actual induction charging time constant for practical types of particles having both finite conductivity and permittivity. All investigations were based on numerical simulations done for idealized geometric models of the problem. The model was developed for the transient case and solved by using the COMSOL commercial software, which is based on the finite-element method. Spherical and rough particles with various contact areas with the ground electrode were considered. The surface conduction of the particle was neglected. The effect of the particle contact area, conductivity, and permittivity on the actual charging time constant was investigated, and the results were compared with that predicted by the classic relaxation time constant, as defined by the material properties. It was found that the actual time constant is not equal to the relaxation time constant but is directly affected by the value of the contact area between the particle and ground electrode.
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