Analysis of the Deformation of the Rotational Magnetic Field Caused by Homopolar Harmonics in Three-Phase Motors with Saturation
DOI:
https://doi.org/10.61799/2216-0388.1684Keywords:
Rotating Magnetic Field, Zero-Sequence Harmonics, Saturation, Deformation, Three-Phase Motors.Abstract
The article analyzes the deformation of the rotating magnetic field in three-phase motors, caused by the presence of zero-sequence harmonics in the current and the effect of ferromagnetic material saturation. Zero-sequence harmonics contribute to core saturation and the deformation of flux density waves, generating both positive and negative sequence harmonics. It is highlighted that the saturation of the ferromagnetic material gives the field a hexagonal shape, deviating from the ideal circle described in classical literature. The conclusion is that if zero-sequence harmonics are allowed in the current, they do not directly affect the rotating magnetic field; however, their presence distorts flux densities due to core saturation, creating additional harmonics that further deform the rotating magnetic field path beyond the hexagonal shape caused by saturation. The machine model and the rotating magnetic field evaluation are carried out in Matlab's Simulink using the Clarke transform.
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