Dielectric breakdown properties of low-density polyethylene under power-frequency voltages with high-frequency components

Hidenori Suzuki, Yoshimichi Ohki, Yoshinobu Nakamichi, Kohji Ajiki

Research output: Contribution to conferencePaper

Abstract

For magnetic levitation railway systems using linear synchronous motors, pulse-width-modulation inverters and polymer insulated cables are used for driving cars and feeding electricity, respectively. This implies that ac voltages with many harmonics induced by inverters are applied to cables. However, little is known about dielectric properties of polymers under such ac voltages. Therefore, breakdown characteristics have been investigated for low-density polyethylene using power-frequency ac voltages with high-frequency components. It was found that breakdown voltage decreases as the frequency component increases. However, the number of zero-crossings of the applied voltage, which is very influential in the water-tree length, does not seem to play an important role in the dielectric breakdown.

Original languageEnglish
Pages203-206
Number of pages4
Publication statusPublished - 1996 Dec 1
EventProceedings of Joint Conference: 1996 Asian International Conference on Dielectrics & Electrical Insulation Diagnosis, 96'AICDEI & 4th-JCCEID - Xi'an, China
Duration: 1996 Oct 81996 Oct 11

Other

OtherProceedings of Joint Conference: 1996 Asian International Conference on Dielectrics & Electrical Insulation Diagnosis, 96'AICDEI & 4th-JCCEID
CityXi'an, China
Period96/10/896/10/11

ASJC Scopus subject areas

  • Engineering(all)

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