论文标题
在交流电场下，未固定的Tio2晶须/液体硅橡胶复合材料的瞬时介电常数的分析模型
Analytical Model for the Transient Permittivity of Uncured TiO2 Whisker/Liquid Silicone Rubber Composites Under an AC Electric Field
论文作者
论文摘要
介电介电常数梯度设备的电场分级是增强其绝缘性能的有效方法。原位电场驱动的组件是一种用于制造具有自适应介电常数梯度的绝缘设备的高级方法，但是，设计没有理论指导。在这项工作中，开发了一个具有时间常数的分析模型，以确定在应用的AC电场下未固定的复合材料的瞬态介电常数。该模型基于光学图像和介电介电常数监测，从而避免了复杂电动力学的直接处理。对于具有给定组件的复合材料，增加的填充含量和电场强度可以加速瞬态过程。与基于微分方程的有限元方法（FEM）相比，该统计模型很简单但有效，并且可以应用于任何可能包含多个填充剂的低粘度固定复合材料。更重要的是，当将电压应用于未固定的复合绝缘设备上时，建议的模型可用于分析该设备的时空介电常数特性，并优化其用于电场分级的介电常数梯度。
The electric field grading of dielectric permittivity gradient devices is an effective way of enhancing their insulation properties. The in-situ electric field-driven assembly is an advanced method for the fabrication of insulation devices with adaptive permittivity gradients, however, there is no theoretical guidance for design. In this work, an analytical model with a time constant is developed to determine the transient permittivity of uncured composites under an applied AC electric field. This model is based on optical image and dielectric permittivity monitoring, which avoids the direct processing of complex electrodynamics. For a composite with given components, the increased filler content and electric field strength can accelerate the transient process. Compared with the finite element method (FEM) based on differential equations, this statistical model is simple but efficient, and can be applied to any low-viscosity uncured composites, which may contain multiple fillers. More importantly, when a voltage is applied to an uncured composite insulating device, the proposed model can be used to analyse the spatiotemporal permittivity characteristics of this device and optimise its permittivity gradient for electric field grading.
