Browse > Article
http://dx.doi.org/10.7471/ikeee.2019.23.1.254

Fault-tree based reliability analysis for bidirectional converter  

Heo, Dae-ho (Dept. of Electronics and Control Engineering, Hanbat National University)
Kang, Feel-soon (Dept. of Electronics and Control Engineering, Hanbat National University)
Publication Information
Journal of IKEEE / v.23, no.1, 2019 , pp. 254-260 More about this Journal
Abstract
The failure rate of bidirectional dc-to-dc converter is predicted through the failure mode and effect analysis (FMEA) and the fault-tree analysis (FTA) considering the operational risk. In order to increase the driving voltage of the electric vehicle efficiently, the bidirectional converter is attached to the front of the inverter. It has a boost mode for discharging battery power to the dc-link capacitor and a buck mode for charging the regenerative power to the battery. Based on the results of the FMEA considering the operating characteristics of the bidirectional converter, the fault-tree is designed considering the risk of the converter. After setting the design parameters for the MCU for the electric vehicle, we analyze the failure rate of the capacitor due to the output voltage ripple and the inductor component failure rate due to the inductor current ripple. In addition, we obtain the failure rate of major parts according to operating temperature using MIL-HDBK-217F. Finally, the failure rate and the mean time between failures (MTBF) of the converter are predicted by reflecting the part failure rate to the basic event of the fault-tree.
Keywords
Bidirectional dc-to-dc Converter; EV (Electric Vehicle); FMEA (Failure Modes and Effect Analysis); FTA (Fault-tree analysis); MCU (Motor Control Unit); MTBF (Mean Time Between Failures);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 J. Hsu, C. Ayers, and C. Coomer, "Report on toyota/prius motor design and manufacturing assessment," report, Oak Ridge National Lab. (ORNL), 2004. DOI: 10.2172/885676
2 C. Ayers, "Evaluation of 2004 toyota prius hybrid electric drive system interim report," report, Oak Ridge National Lab. (ORNL), 2004. DOI: 10.2172/885776
3 S. P. Kim, S. J. Park, F. S. Kang, "Circuit configuration of step-up converter with reduced working voltage of output capacitor," Journal of inst. Korean. electr. electron. eng., vol. 22, no. 3, pp. 630-637, 2018. DOI: 10.7471/ikeee.2018.22.3.630
4 U. M. Choi, "Unreliable components and reliability evaluation method in power electronic system," Journal of Power Electronics, vol. 23, no. 3, pp. 34-40, 2018.
5 S. Yang, A. Bryant, P. Mawby, D. Xiang, L. Ran, and P. Tavner, "An industry-based survey of reliability in power electronics converters," IEEE Trans. Industry Applications, vol. 47, no. 3, pp. 1441-1451, 2011. DOI: 10.1109/TIA.2011.2124436   DOI
6 J. S. Lee, "Life-time evaluation technology of Power conversion system," Journal of Power Electronics, vol. 23, no. 3, pp. 41-47, 2018.
7 J. S. Kim, J. S. Choi, J. G. Bin, F. S. Kang, "Fault Tree Analysis and its Application for Designing High Reliability Electrical System in Underwater Vehicle," Journal of Korean Inst. electr. eng., vol. 66, no. 1, pp. 33-39, 2017.
8 Military Handbook, Reliability Prediction of Electronic Equipment, 1991.