直流ランプ電圧重畳時における酸化ポリプロピレンフィルムの高電界交流損失電流波形

概要

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Nonpolar polymers, such as polyethylene, polypropylene and so on, are widely used as the electrical insulating materials for power cable and capacitor. In our investigation, the electric field dependence of tanδ is rapidly increase in high-field and high-temperature region. From the results of the AC dissipation current waveform observations for electon beam irradiated crosslinked polyethylene, it was indicated that the homo charge injected from the electrode is mainly dominated in high-field and high-temperature region. These injected homo space charges would become hetero space charge at next half cycle under AC electric field. It is very important to investigate the high-field AC conduction mechanism. Then, the electrode metal dependence of dissipation current was estimated by using the AC dissipation current waveform observation under the superposed DC ramp voltage for an oxidized polypropylene film at room temperature, 60 and 90℃. These results showed that the previous hypothesis was exactly occurred in high-field and high-temperature region.
沼津工業高等専門学校の論文
1996-01-31