EKF-based fault diagnosis for open-phase faults of PMSM drives

Abstract

The reliability of PMSM drives has been dealt with an important factor in industrial applications requiring a precise operation and high-performance. This paper proposes the fault diagnosis for open-phase faults of PMSM drives using an Extended Kalman Filter (EKF) and DC-link current information. The proposed fault diagnosis can be achieved without additional devices and distinguish where the open-phase fault occurs between PMSM and power electronic equipment. the feasibility of the proposed fault diagnosis scheme is proved by Simulation results.