The Stator Current Spectrum as Fault Identification Mean for Combined Faults in an AFPM Synchronous Generator

The article investigates the stator current spectrum of the machine, as fault identification mean in the cases of partial demagnetization, and partial demagnetization combined with static eccentricity, either angular or axis. The machine in which the analysis had been done is an Axial Flux Permanent Magnet (AFPM) Synchronous Generator, with double-sided rotor topology and a coreless stator. The generator's healthy and faulty simulations are conducted using Finite Element Method (FEM) in three dimensions. The novelty of this article is that, although the stator current spectrum had been widely used as a fault identification mean in electrical machines with conventional topology, it is used for the first time for combined fault analysis in AFPM synchronous machines.