Title :
Fractal character of DC trees in polymethylmethacrylate
Author :
Fujii, M. ; Watanabe, M. ; Kitani, I. ; Arii, K. ; Yoshino, K.
Author_Institution :
Dept. of Electr. Eng., Ehime Univ., Japan
fDate :
12/1/1991 12:00:00 AM
Abstract :
The fractal dimensions of DC trees in polymethylmethacrylate have been investigated using the self-correlation function. The fractal-established range is proportional to the tree length for both positive and negative polarities of the applied voltage. For positive polarity, the fractal dimension increases with increasing inception voltage and saturates at 1.5 to 1.6. For negative polarity, the fractal dimension is nearly constant, ≈1.5, as a function of voltage
Keywords :
electric breakdown of solids; fractals; organic insulating materials; polymers; DC trees; fractal dimensions; inception voltage; negative polarities; polymethylmethacrylate; positive polarities; self-correlation function; tree length; Electrodes; Fractals; Geometry; Needles; Pattern analysis; Plastic insulation; Polymers; Solids; Trees - insulation; Voltage;
Journal_Title :
Electrical Insulation, IEEE Transactions on
