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http://dx.doi.org/10.7471/ikeee.2019.23.1.261

Analysis of failure rate according to capacitor position of bidirectional converter  

Kim, Ye-rin (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. 261-265 More about this Journal
Abstract
We analyze the failure rate change of a conventional bidirectional converter and a modified one which moves an output capacitor towards propulsion battery. We analysis of the circuit structural homogeneity and the difference between both converters, and confirm that the capacitor working voltage is reduced by changing the capacitor position. After obtaining the capacitor failure rate according to voltage stress factor and operating temperature, it is applied to the fault-tree of the bidirectional converter to obtain the overall failure rate of the converter. We analyzes the advantages and disadvantages of design changes by comparing and analyzing the failure rate and mean time between failures (MTBF) according to operating temperature and capacitance value.
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);
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Times Cited By KSCI : 2  (Citation Analysis)
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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 Military Handbook, Reliability Prediction of Electronic Equipment, 1991.
5 D. H. Kim and F. S. Kang, "Fault-tree based reliability analysis for bidirectional converter," Journal of inst. Korean. electr. electron. eng., vol. 23, no. 1, 2019.
6 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.
7 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