Message from Editors

THE electric machine systems have been utilized widely and played important roles in many industrial applications. The high-reliability electric machine systems and fault-tolerant operation technology are critical enablers for the industry to unlock significant improvements in system maintainability, total life-cycle costs, and overall system reliability. The high-reliability electric machine systems offer features of simple and robust structures, and low failure rate. When unavoidable failures occur, the faulty parts in electric machine systems should be diagnosed accurately and isolated effectively. The fault-tolerant strategies can help the system maintain operation performance in some certain aspects, and thus keep the total system working continuously.