Damage estimation and reconfigurable control for a PMSM-Inverter system under demagnetization fault

This paper presents a novel autonomous optimal control strategy to relieve the increasing damage of inverters on PMSMs-driven rail vehicles when the demagnetization fault occurs. IGBTs damages caused by PMSM demagnetization are analyzed firstly. Then, a novel reconfigurable control strategy is proposed for health management of the whole PMSM-Inverter system by adaptively adjusting power distribution of PMSMs to get extended IGBTs life. The performance of the developed scheme is validated through a set of simulated experiments of PMSM demagnetization. The result shows that accurate estimation of demagnetization condition is obtained, and effective real-time reconfigurable control decisions are achieved which can extend lifecycle of the whole system.