Effects of Hot Pressing Temperature and Pressure on Dielectric Properties of Aramid Insulating Paper

Yuanxin Yao, Meng Huang (), Jie Ma, Yanxiao Su, Sheng Shi and Chunhe Wang
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Yuanxin Yao: State Key Laboratory of New Energy Power System, School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
Meng Huang: State Key Laboratory of New Energy Power System, School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
Jie Ma: State Key Laboratory of New Energy Power System, School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
Yanxiao Su: State Key Laboratory of New Energy Power System, School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
Sheng Shi: State Key Laboratory of New Energy Power System, School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
Chunhe Wang: State Key Laboratory of New Energy Power System, School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China

Energies, 2022, vol. 15, issue 21, 1-11

Abstract: The hot pressing parameters and fiber ratio have an important influence on the dielectric properties of aramid insulating paper. In order to deeply explore its influence and the mechanism behind it, aramid insulating papers were made with different hot pressing temperatures and pressures as well as fiber ratios. Its tightness, dielectric constant, and AC breakdown strength were tested, and its microstructure was analyzed by scanning electron microscopy. It was found that with an increase in hot pressing temperature, pressure, and fibrid content, the overall dielectric constant of the insulating paper showed a slight upward trend, while the tightness and AC breakdown strength continued to increase. Hot pressing temperature and pressure have a synergistic effect on the dielectric properties of insulating paper. The effects of these two parameters on the dielectric properties of insulating paper are similar, while the AC breakdown strength is greatly affected by the fiber ratio. In this paper, the influence mechanism by which the microstructure and fiber crystallinity of insulating paper is affected in the hot pressing process is discussed.

Keywords: aramid insulating paper; dielectric constant; breakdown strength; hot pressing; fiber ratio (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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