Impact of Cost-Function Analysis in Interturn Faults Diagnosis using Current Control Prediction for SPMSM Drives

Interturn fault is very common in surface-mounted permanent magnet synchronous motor (SPMSM), and if not detected on time, it may lead to permanent damage of motor. This paper presents the impact of cost-function analysis in interturn fault diagnosis using current control prediction method. Cost-function calculation requires predictive as well as actual motor currents. Based on presence of dc and second harmonic components in current fault diagnosis in the motor can be accomplished. The proposed method is validated via MATLAB/Simulink and verified by using small-scale experimental setup DSPACE DS1104 real-time controller at a frequency of 10 kHz.