| Title |
A Study on Enhancing Tripod Fault Detection Reliability through Control Card Circuit Improvement in High-Speed Railway Vehicles |
| Authors |
오효석(Hyo-Seok Oh) ; 박태용(Tae-Yong Park) ; 최용은(Yong-Eun Choi) ; 김재문(Jae-Moon Kim) |
| DOI |
https://doi.org/10.5370/KIEE.2023.72.10.1315 |
| Keywords |
High-speed railway vehicles; propulsion control system; control card; tripod unbalance; fault detection |
| Abstract |
High-speed railway vehicles require substantial power output to achieve high-speed operation, making the performance of the propulsion system, responsible for power supply, of utmost importance. The propulsion control system for high-speed railway vehicles varies in terms of output and control methods based on the vehicle type, but malfunctions can significantly disrupt railway operations. An analysis of recent three-year breakdown data from high-speed railways reveals issues such as short circuits, power supply failures, fan malfunctions, and converter overcurrent faults. Notably, control card replacements account for approximately 30% of all failures. However, control cards for propulsion control systems are not included in routine inspections, and their operational lifespan remains undefined, leading to the practice of replacement with spare parts upon failure. Furthermore, fault detection of control cards, resulting in erroneous fault identification, also impacts train operations. This paper confirms that the ESB3 card, responsible for detecting the unbalance of the tripod that transmits power among the control cards of the propulsion control system, detects an imbalance due to organic noise voltage generated during train operation. After improving the existing circuit, it was applied to a current vehicle test and verified as an improvement measure for fault detection. |