LUT-based Modelling of PMSMs Considering Spatial Harmonics, Interturn Short-Circuit Faults, and Zero-Sequence Components

This paper presents a general model for permanent-magnet synchronous machines (surface-mounted or interior permanent-magnet) considering both space harmonics, interturn short-circuit faults and zero-sequence components. First, the healthy machine model is obtained. Magnetic saturation is disregarded such that the machine inductances depend only on the rotor position, allowing for a relatively straightforward derivation of the relations between flux-linkages, torque, currents, and rotor position. Secondly, the faulty machine model is derived assuming that the effect of the precise position of the interturn short-circuit inside the slot is negligible. Thirdly, the latter model is upgraded with an artificial neural network to account for the relative position of the interturn short-circuit. Finally, all the presented models are validated based on a finite-element analysis.