@inproceedings{d0ce05c9658c4f19bb5afe9482fb6ed4,
title = "Derivation of an Impregnation Enhancement Factor Under Different Pressure Levels for Partial Discharge Risk Assessment",
abstract = "Higher DC bus voltage increases the risk of partial discharge (PD) in transportation motors, making accurate PD risk assessment crucial for ensuring safe motor operation. Motor windings are typically impregnated; however, to evaluate the worst-case scenario involving air bubbles within the impregnation material, the partial discharge inception voltage (PDIV) of non-impregnated windings becomes a key parameter for conservative PD risk evaluation. Yet, since motors are generally impregnated during the manufacturing process, obtaining the PDIV of a non-impregnated insulation system is challenging. Therefore, this paper introduces an impregnation enhancement factor, which is accurately determined through PDIV measurements conducted on both non-impregnated and impregnated samples under various pressure conditions. Using this factor, the PD risk under the worst-case scenario can be quantitatively assessed based on the known PDIV of an impregnated insulation system.",
keywords = "electrical machines, impregnation, insulation, partial discharge, pressure",
author = "Yatai Ji and Yuemao Dang and Yifu Ren and Fengtao Gao and Weiduo Zhao and Pinjia Zhang",
note = "Publisher Copyright: {\textcopyright} 2025 Korean Institute of Electrical Engineers Electrical Machinery and Energy Conversion Systems Society.; 28th International Conference on Electrical Machines and Systems, ICEMS 2025 ; Conference date: 16-11-2025 Through 19-11-2025",
year = "2025",
doi = "10.23919/ICEMS66262.2025.11317582",
language = "English",
series = "ICEMS 2025 - 28th International Conference on Electrical Machines and Systems",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "1225--1230",
booktitle = "ICEMS 2025 - 28th International Conference on Electrical Machines and Systems",
address = "United States",
}