Real-Time Model-Based Detection of Intern-Turn Short Circuit Faults in Dual Three-Phase Permanent Magnet Synchronous Motors

This study presents a comprehensive analytical model for the real-time detection of Intern-Turn Short Circuits (ITSCs) in Dual-Three-Phase Permament Magnet Synchronous Motors (DTPPMSMs). The electrical signals are decoupled into independent complex planes via Vector Space Decomposition (VSD) and controlled using a specifically designed control system. The proposed method enables the real-time identification and diagnosis of an ITSC affecting the stator winding without further measurements, hence decreasing maintenance and monitoring costs. Moreover, it is demonstrated that the ITSC slightly alters the magnetic axis of the faulty phase, and according to this effect, the relative position of the coil within the faulty pole pair can be determined. Experiments with a prototype of a DTPPMSM are carried out to assess the effectiveness of the proposed method.