Enhanced breakdown strength and corona aging life in PI dielectric based on heterogeneous all-organic design

被引：0
|
作者：
Zhang, Wenchao [1 ,2 ]
Zhang, Yong [1 ,2 ]
Yue, Dong [1 ,2 ]
Wang, Puzhen [1 ,2 ]
Liu, Yunpeng [3 ]
Wu, Haijuan [3 ]
Li, Jialong [4 ]
Feng, Yu [1 ,2 ]
机构：
[1] Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin,150080, China
[2] School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin,150080, China
[3] Institute of High Energy Physics, Chinese Academy of Sciences, Beijing,100049, China
[4] School of Mechanical and Electrical Engineering, Shanxi Datong University, Datong,037009, China
来源：
Materials Today Communications | 2024年 / 41卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Railroad transportation;
D O I：
10.1016/j.mtcomm.2024.110982
中图分类号：
学科分类号：
摘要：
The high-speed train is developing towards higher speed and greater load capacity. As an important part of this, inverter-fed traction motors need higher power. As the turn-to-turn insulating material for inverter-fed traction motors, polyimide (PI) does not satisfy the requirements for breakdown strength and corona aging life with higher power. In this paper, the heterogeneous all-organic composite is designed with polyimide as matrix and acrylic elastomer (DE) as reinforcing material. When the load of DE is 0.5 wt%, the breakdown strength of the thermosetting DE/PI composites is up to 740 kV/mm, which is 60 % higher than PI (462 kV/mm) and the corona aging life is up to 70.4 h which is increased by about 340 % compared with PI (16 h). The synergy of free volume and trap makes comprehensive properties enhanced in the thermosetting DE/PI composite. This work provides a new design for turn-to-turn insulation with a high voltage level and a high operating frequency. © 2024
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