| With the leap-forward development of China railway equipment technology, the power supply of the railway passenger train cancels generator car and adopts the DC600V direct power supply system, it can reduce fuel consumption and realize the sustainable development of energy saving and environmental protection. DC600V inverter is key component of the railway passenger train power supply system. It can normally work is directly related to the comfort and safety of passenger train. Through the analysis of the inverter fault statistics, it is found that the inverter can’t normally start up after neutral-section passing of the direct power supply passenger trains. Therefore, overhauling and testing to inverter fault components has great significance for the engineering.This paper combines with the actual situation of DC600V inverter overhauling in railway vehicle segment, an inverter neutral-section passing performance test device is developed by taking DC600V inverter as the research object. Firstly, The basic working principle of the DC600V power supply system and the main structure of the inverter are analyzed. The overall design scheme of neutral-section passing performance test device is determined. Secondly, the system reliability index is quantitatively analyzed by using methods of mathematical statistics. It provides quantitative criteria for system reliability evaluation and provides basis for improving test device. Through the modeling analysis of the reliability of DC600V inverter neutral-section passing performance test, and starting from the failure mode of basic components and the function structure of test device, a certain component is analyzed by using failure mode influence analysis method according to the main function of the test device. And the relationship between failure and test device state are determined. Then carry on hardware development, software algorithm formulating, system programming, prototype debugging and optimization etc. The testing device system provides a reliable test facility for overhauling and testing of inverter, which can effectively solve the difficult problem of the low efficiency and unreliable maintenance performance of the original inverter detection. |
