MATEC Web Conf.
Volume 113, 201712th International Scientific-Technical Conference on Electromechanics and Robotics “Zavalishin’s Readings” - 2017
|Number of page(s)||6|
|Section||Electromechanics and Electric Power Engineering|
|Published online||20 June 2017|
Evaluation of functional reliability indices for DC-link capacitors in pulse-width modulation converters
Pryazovskyi State Technical University, Department of Electrical Engineering, 87500 Mariupol, Ukraine
* Corresponding author: email@example.com
The impact of kHz range harmonics on the power losses, thermal stress, and lifetime reduction of the dc-link capacitors in pulse-width modulation (PWM) converters was investigated. Expressions to evaluate the mean time to failure, survival probability, and unavailability of aging failure for dc-link capacitors are presented. The dc-link capacitors failures due to accelerated insulation aging were modeled using Weibull and normal distribution. A case study with the Siemens SINAMICS S120 frequency converter for driving of rolling mill leveler shows that the failures of motor modules due to breakdown of electrolytic dc-link capacitors registered for the time frame from May 2012 to October 2012 can be caused by the increased ambient temperature and additional heating due to high-frequency components of the ripple current. As a possible solution to improve reliability of motor modules, the four AVX FFVE4I0227K film capacitors instead of nine EPCOS B43564 electrolytic capacitors in dc-link were recommended.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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