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With the rapid development of Internet technologies such as cloud computing and big data, the scales of distributed information systems in big companies have grown to enormous sizes. Automatic detection and diagnosis of system faults in the large-scale information systems is complicated and important in both practice and research. In this paper, we propose a Graph-based Fault Diagnosis approach in...
Power electronic converters are one of the most fragile components in wind turbines. This paper proposes a two-dimensional (2-D) case temperature-based real-time aging monitoring method for insulated-gate bipolar transistor (IGBT) modules in power converters. By placing two thermal sensors for each switch at the interface between the baseplate of an IGBT module and the cold plate, the thermal parameters...
Insulated gate bipolar transistor (IGBT) failures are a major issue in modern power electronics applications. Two most dominated failure mechanisms of IGBTs are solder fatigue and bond wire wear-out. This paper proposes a new method to online monitor an IGBT's health condition by using the instantaneous junction temperature variation between present and the first operating cycles of the IGBT with...
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