A fuzzy-based approach for open-transistor fault diagnosis in voltage-source inverter induction motor drives
School of Automation, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
a e-mail: firstname.lastname@example.org
Revised: 5 September 2014
Accepted: 5 January 2015
Published online: 20 February 2015
This paper develops a novel method for the detection and isolation of open-transistor faults in voltage-source inverters feeding induction motors. Based on analyzing the load currents trajectories after Concordia transformation, six diagnostic signals each of which indicates a certain switch are extracted and a fuzzy rule base is designed to perform fuzzy reasoning in order to detect and isolate 21 fault modes including single- and double-transistor faults. In addition, the fuzzy rules are rearranged and each of them is set to a reasonable value representing the fault modes. The simulation and experiment are carried out to demonstrate the effectiveness of the proposed fuzzy approach.
© EDP Sciences, 2015