High-resistance connection fault severity detection in a permanent magnet synchronous machine drive system

Abstract

This paper proposes a method for high-resistance connection (HRC) fault severity detection in a permanent magnet synchronous machine (PMSM), which helps in determining the scheduled maintenance. The proposed method is based on the zero sequence voltage component (ZSVC) and the stator currents. The PMSM mode in abc stationary frame is presented. The relationship between the ZSVC, the stator currents and the additional resistances of the faulty phases is established. The HRC fault severity detection is described by solving a binary linear equation group about the additional resistance of each faulty phase. The simulation is carried out to validate the proposed method. The results show that the HRC fault severity can be effectively detected by the proposed method in the PMSM drive system.