Kenta Ochiai, Atsuhiro Izu, R. O'ishi, H. Kojima, H. Mitsudome, H. Yanase, K. Okamot, K. Kato, N. Hayakawa
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Fabrication of Permittivity Graded Materials ($\varepsilon$ -FGM) by Flexible Mixture Casting Method
For the downsizing of gas insulated power apparatus, we have proposed the electric field grading technique by “functionally graded materials” with spatial distribution of permittivity ($\varepsilon$ -FGM). In this paper, we fabricated post-type and truncated cone-type $\varepsilon$ -FGM by a novel and practical technique “flexible mixture casting method” (FMC method). We confirmed that $\varepsilon$ -FGM by FMC method has the discharge inception voltage improvement effect by both experiment and simulation.
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