| Title |
A Study on the Development of DAQ for Capacitor Condition Estimation in Railway Vehicles SIV |
| Authors |
심규석(Kyu-Seok Shim) ; 오효석(Hyo-Seok Oh) ; 장진영(Chin-Young Chang) ; 김재문(Jae-Moon Kim) |
| DOI |
https://doi.org/10.5370/KIEE.2024.73.9.1581 |
| Keywords |
Railway Vehicles; CBM; capacitor condition estimation; DAQ |
| Abstract |
The maintenance of railway vehicles is currently performed based on Time Based Maintenance (TBM), which is maintained according to a predetermined driving distance and time. However, the TBM system has problems such as breakdowns during vehicle operation due to manufacturing errors and usage environment, or replacement in a state where the remaining life is left. To solve these problems, it is necessary to introduce Condition Based Maintenance (CBM), which can analyze and diagnose the aging or abnormal state of electronic products in real time. Power conversion devices are used to supply propulsion and various loads of railway vehicles, but they have a direct impact on vehicle operation due to frequent failures. The main cause of failure of the power conversion device is a defect in the capacitor, and it is important to estimate the state of the capacitor to prevent failure. In this paper, we have developed a DAQ (Data Acquisition) device that can be installed on existing vehicles for capacitor state estimation and monitoring, and proposed a technique that can estimate the ESR and capacitance of the capacitor through one algorithm in various SIV (Static Inverter) circuits. To verify this, we conducted an experiment by configuring an AC/DC converter, and as a result, we confirmed the validity of the capacitor state estimation system with a maximum error of 2.54%. |