Two-Phase Open-Circuit Fault Tolerant Control Based on Five-Phase Current-Source Inverter

Current-source inverter (CSI) is considered as a promising candidate for PMSM drives. The employment of dc-link inductor instead of the bulk capacitor utilized in the voltage-source inverter (VSI) makes CSI more reliable on resisting the short-circuit fault of semiconductor devices. It is also recognized that the five-phase machine gains better reliability under winding fault conditions. It is worthwhile to explore the feasibility of the combination of CSI and the five-phase control scheme. In this paper, the CSI-based five-phase PMSM drive is investigated. Two-phase open-circuit fault is considered and the fault tolerant control based on CSI topology is proposed. The vector space distributions under the healthy and fault conditions are presented for reference synthesis. Simulation results provide better validation for the proposed schemes.