The novel SLIM method for the determination of the iron core saturation level in induction motors

Lately, a new diagnostic mean has been introduced for reliable fault diagnosis in delta-connected induction motors. This diagnostic mean is the zero-sequence current frequency spectrum. It will be shown in this paper that, the zero-sequence current waveform can be reliably used for identifying the induction motor's iron core saturation level. So in this work, simulations with the Finite Element Method and experimental testing are carried out, with the healthy induction motor operating under different load levels. The paper proposes a novel method called SLIM for reliable induction motor saturation level determination.