| Title |
Capacitance Prediction of Electrolytic Capacitor for Single Phase Converter of Static Inverter |
| Authors |
김민섭(Min-Seop Kim) ; 최용은(Yong-Eun Choi) ; 오효석(Hyo-Seok Oh) ; 김재문(Jae-Moon Kim) |
| DOI |
https://doi.org/10.5370/KIEE.2021.70.2.425 |
| Keywords |
Static Inverter; Condition Based Maintenance; Capacitor; Impedance; Capacitance |
| Abstract |
In this paper, to solve the difficulty of attaching current transducer on the electrolytic capacitor, a technique that can indirectly estimate the current flow of the capacitor during electric multiple unit’s operation is presented. Moreover, life prediction study is conducted to estimate the amount of change in impedance and capacitance for predicting an appropriate replacement timing of the capacitor. Accordingly, the experimental circuit was constructed and then verification is performed with a LCR meter to validate the impedance and capacitance estimation techniques. The results from the verification showed an error rate of 5%, therefore, validating the proposed method for the application of electric multiple units. |