Fault Diagnosis of LLC Converter Controlled by Fractional Order $PI^{\lambda}D^{\mu}$ under Fault Tree

Abstract

A fault diagnosis method based on fractional order PI D control LLC converter is proposed. The main content is to apply the fault tree meth-od to the converter and analyze its fault. First set the LLC converter fault that may occur, select the top events, intermediate and bottom events, and then establish LLC converter fault tree, using the circuit principle analysis and MATLAB simulation, and with the LLC converter under normal working condition of output voltage value comparison, finally, LLC, fault analysis, fault tree to determine the middle and bottom events, so as to find out the LLC converter failure. The comparison of output voltage value through LLC converter not only has faster diagnostic speed, but also has low false diagnosis rate and strong robustness, which plays a very important role in ensuring the normal operation of LLC converter.