N.N. Minakova, V.S. Trofimov
Application of Texture Analysis for Voltage Drop Distribution Evaluation Along the Length of a Large-Sized Polymer Composite Resistor
The paper discusses the possibility evaluation results of texture analysis application for studying the voltage drop distribution uniformity along the length of a largesized resistor. As a part of tools selection process for the distribution uniformity evaluation at the design stage, the possibility of obtaining the quantitative parameter that correlates with the distribution uniformity is analyzed. It is shown that texture analysis of structure microphotographs of carbon-filled rubbers can be utilized for the evaluation of the distribution uniformity. Conducted experiments reveal that the histogram entropy of a textural feature can provide the quantitative evaluation. Experimental studies are conducted for the distribution uniformity evaluation depending on concentration and type of a filler and matrix form. Voltage drops have been measured over sections of equal length along the length of the resistor. Then, electric field intensities and spread of intensities have been calculated (КЕ). It is revealed that the spread of voltage drops along the length of the large-sized resistor correlates with the entropy of a textural feature.
Key words: large-sized resistors, macrostructure, electrical volume resistivity, temperature coefficient of resistance, texture analysis, filled polymers, the entropy of a textural feature
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