Stability Analysis and Incipient Fault Tolerant Control for Multiple-output Wireless Power Transfer Systems

This paper investigates the incipient fault diagnosis problem of the multiple-output wireless power transfer system (MWPTS). And the MWPTS described in this paper has nonlinearity and high-order characteristics. Firstly, based on the Kirchhoff theorem and the interconnect system modeling method, a more realistic dynamics model of MWPTS with incipient faults, parameter uncertainty, and time delay is established. The proposed modeling method dramatically reduces the order of MWPTS. Then, a novel observer-based control strategy is proposed to estimate incipient faults while keeping the system stable even if MWPTS are affected by time delay and parameter uncertainty. Finally, the simulation result verified the availability of the incipient fault-tolerant method.