Experimental Investigation of a High-Fidelity Transient Model for an Interior Permanent Magnet Machine with Arbitrary Stator Turn Fault

An accurate transient model of the machine operating under fault conditions is essential to save time and resources for experimental testing when developing fault-tolerant control strategies. This paper describes the LUT based simulation and experimental verification of the high-fidelity interior permanent magnet machine model with stator turn fault available in the literature. The approach involves the extraction of flux linkage maps of the machine under turn fault conditions using offline static finite element (FE) analysis,and combining it with voltage equations of the machine. The method is not limited to IPM machines and can be used to model stator turn faults in other machines such as surface PM machines, synchronous reluctance machines, switched reluctance machines, wound field synchronous machines, etc. The proposed approach provides a complete representation of the spatial harmonics and magnetic saturation in the presence of inter-turn faults and under all load conditions, making it the most accurate representation of the faulty motor behaviour apart from a time stepping FE coupled analysis.