| Study on Thermal Aging Performance of Special Cable for Maglev Rail Transit |
| Received:September 01, 2023 Revised:September 04, 2023 |
| DOI：10.12136/j.issn.1000-890X.2025.02.0131 |
| Key Words: maglev rail transit cable；insulation compound；ethylene-propylene rubber；thermal aging performance；activation energy |
| Author Name | Affiliation | E-mail | | GAO Lei* | Shanghai Electric Cable Research Institute Co.，Ltd，State Key Laboratory of Special Cable Technology | 15192012867@163.com | | HONG Ningning | Shanghai Electric Cable Research Institute Co.，Ltd，State Key Laboratory of Special Cable Technology | | | WU Zhongxiao | Shanghai Electric Cable Research Institute Co.，Ltd，State Key Laboratory of Special Cable Technology | |
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| Abstract: |
| The thermal aging performance of special cable for maglev rail transit was studied，the thermal aging behavior of the cable insulation compound（ethylene-propylene rubber compound） under different temperature gradients，the deterioration trend of the performance after equivalent aging at 90 ℃ for 5，10，20，30 years and the change rule of the activation energy with the extension of the equivalent aging time were analyzed.The results showed that the aging process of the cable insulation compound could be divided into the primary aging stage，the rapid aging stage and the final aging stage.The performance deterioration mainly occurred in the rapid aging stage，in which the number of carbonyl groups of the cable insulation compound increased continuously. The activation energy of the cable insulation compound increased first，then decreased and finally increased with the extension of the equivalent aging time. |
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