Search Results - "Shibuya, Yoshikazu"

Influence of VFT on Shell-Type Transformer by Fujita, S., Shibuya, Y., Ishii, M.

“…When a disconnecting switch in a gas insulated switchgear (GIS) operates, a high frequency oscillating surge called very fast transient (VFT) is generated. The…”
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Analysis of high-frequency oscillations in voltage transformers by Shibuya, Yoshikazu, Wada, Kotaro, Muto, Hirotaka

“…High‐frequency oscillations in voltage transformers are analyzed by the FFT method, using an equivalent lumped circuit. Such an analysis has been regarded as…”
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High frequency model of transformer winding by Shibuya, Yoshikazu, Fujita, Shigeto

“…A high frequency model of transformer winding is used to analyze the voltage oscillations due to various excitations such as the very fast transient…”
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Electromagnetic waves from partial discharges and their detection using patch antenna by Shibuya, Yoshikazu, Matsumoto, Satoshi, Tanaka, Masayoshi, Muto, Hirotaka, Kaneda, Yoshiharu

“…The electromagnetic (EM) wave generated by partial discharge (PD) is analyzed using electric dipole model. The pulse electric and magnetic fields are described…”
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Electromagnetic waves from partial discharges in windings and their detection by patch antenna by Shibuya, Yoshikazu, Matsumoto, Satoshi, Konno, Tatsuya, Umezu, Kiyoshi

“…The electromagnetic (EM) radiation accompanying partial discharges (PDs) in enameled-wire winding is analyzed assuming the Gaussian currents in the basic PD…”
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Estimation of the Size of Voids in Coil Insulation of Rotating Machine by Hirabayashi, Shoji, Shibuya, Yoshikazu, Hasegawa, Taketoshi, Inuishi, Yoshio

“…Voids produced in the impregnation process exist in mica insulation system of rotating machine coil. Distribution of those voids' size, gap spacing, and…”
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High-frequency voltage oscillation in transformer windings and electrical breakdown properties of interturn insulation immersed in oil at VFT voltage by Nakanishi, Koichiro, Fujita, Shigeto, Kurita, Hiroshi, Kishi, Akio, Hasegawa, Taketoshi, Shibuya, Yoshikazu

“…Switching operations in gas insulated switchgear (GIS) can generate very fast transient overvoltages (VFTO) which propagate in the GIS with little attenuation…”
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