前課電による空間電荷蓄積が部分放電開始電圧へ与える影響

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  • Influence of Space Charge Accumulation by Pre-stress on Partial Discharge Inception Voltage
  • ゼン カデン ニ ヨル クウカン デンカ チクセキ ガ ブブン ホウデン カイシ デンアツ エ アタエル エイキョウ

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<p>Space charge accumulation characteristics in PAI (polyamide-imide), which are used as an insulating layer of motor windings, were observed under applying a rectangular voltage. Furthermore, PDIV (partial discharge inception voltage) in twisted pair wires coated with PAI was also measured by applying the rectangular voltage previously applied with a dc voltage (prestress), which generates the space charge. Since a change of PDIV was observed in the prestressed sample, it was concluded that the space charge accumulation may affect the change of PDIV.</p>

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