Open-Circuit Fault Diagnosis for the Inverter of Inductive Power Transfer Systems: A Rough-Set-Theory-Based Method

This study investigates the open-circuit fault diagnosis problem in the inverter of the inductive power transfer (IPT) systems. A novel rough-set-theory-based (RST-based) method is proposed to diagnose and locate the open-circuit faults for the first several attempts. First, the system structure of the IPT systems and the operation principle of the inverter are described. Then, by using the proposed rough-sets-theory-based method, a minimum set of necessary variables is obtained from some measurable parameters, which are used to generate the diagnostic rules. Implemented through a set of basic logic units, these rules result in a digital logic circuit for diagnosing inverter open-circuit faults in IPT systems. It should be emphasized that the proposed method not only enables fault diagnosis but also facilitates fault localization. Importantly, it is not constrained by inverter parameters or types. Finally, the simulation and experiment examples are carried out and the results show the effectiveness of the proposed methods.