Abstract
In order to evaluate the reliability of the inverter, this paper adopted sequence and stress accelerated degradation test of a certain type of inverter. Take the voltage as the accelerated stress, setting 0.8 as the linear growth proportion coefficient of stress levels, through the detection of the inverter IGBT collector emitter voltage state and diode voltage to judge the wear condition of the inverter. The accelerated model is obtained through analyzing the test data, and the model parameters are estimated by the least square method. At the same time, the reliability of the inverter is evaluated, and the reliability curve is obtained. Finally, the reliability at the normal stress level is solved through accelerate model. In order to evaluate the effectiveness of Bayes reliability analysis of inverter, the Monte Carlo simulation about accelerated test is done, simulation results and evaluation results are similar. It shows that the accelerated degradation testing data is valid. The evaluation method can be used to evaluate the reliability of other power electronic devices in the rail transit vehicle .
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Acknowledgements
This article is sponsored by National Natural Science Foundation of China under grant no. 51175028, Great scholars training project under CIT&TCD20150312, and Beijing outstanding talent training project under 2012D005017000006.
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Qiu, X., Yang, J. (2018). Reliability Evaluation of Inverter Based on Accelerated Degradation Test. In: Jia, L., Qin, Y., Suo, J., Feng, J., Diao, L., An, M. (eds) Proceedings of the 3rd International Conference on Electrical and Information Technologies for Rail Transportation (EITRT) 2017. EITRT 2017. Lecture Notes in Electrical Engineering, vol 482. Springer, Singapore. https://doi.org/10.1007/978-981-10-7986-3_10
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