Modelling and study of PM machines with inter-turn fault dynamic model–FEM model

In this paper, a simple dynamic model for a PMSM with inter-turn winding fault is derived. Finite element method is used for parameter determination of machine with fault. This dynamic fault model is used to study the PM machine behaviour under various inter-turn fault conditions. A 2D time stepping finite element method (FEM) model is carried out to validate the dynamic fault model. The dynamic model results exhibit the same trend as predicted by FEM analysis for different fault insulation resistances. An experimental test is also conducted to verify the fault model. This model is used to study the machine behaviour under various fault conditions and severity. The proposed model seems to be well adapted for PM motors health monitoring and inter-turn fault diagnosis.

► We present a dynamic model for PMSM with inter-turn winding fault.
► Using Finite element method for parameter determination and validate the dynamic model.
► Applying the proposed model and the experimental tests to study the PMSM behaviour under various inter-turn fault conditions.
► Fault current, phase currents harmonics and sequences and also torque ripples are some of fault indicators.