Modeling & analysis of weld short faults of bar-wound propulsion IPM machine part II: Phase-to-phase short

The phase-to-phase short due to weld short of bar-wound IPM machine is modeled and analyzed using FEA. A finite element model (FEM) coupled with a circuit and system simulator software, Simplorer, for fault simulation is constructed based on a FEM cosimulation of a healthy motor. The fault location and affected windings are chosen based on welds that are physically adjacent. The FEM is used to solve the electromagnetic field and Simplorer is used to simulate the transient performance of the faulted machine. Results are obtained for three fault cases and operating conditions, including maximum speed and maximum torque. These results are observed in both the time domain and frequency domain.