What can cause a deformation in the ideal rotating magnetic field of a three-phase machine?

The ideal rotating magnetic field in a three-phase machine is characterized by its symmetry and uniformity in magnetic field distribution, which is essential for smooth operation and efficiency. The correct answer identifies that both non-symmetrical stator windings and non-ideal net situations can lead to the deformation of this ideal magnetic field.

Non-symmetrical stator windings disturb the uniform current distribution in each phase of the machine. When the winding configurations are not balanced, or when there is an unequal number of turns or an irregular placement of the windings, this leads to an uneven magnetic field that can result in torque ripple, noise, and increased losses. This is critical as the ideal rotating magnetic field relies on equal contributions from all phases to maintain uniformity.

On the other hand, a non-ideal net situation can also lead to significant issues. This refers to conditions that may include imbalances in the supply voltages or phases, or variations in the load. Such conditions can result in an uneven phasing of currents, causing the rotating magnetic field to become distorted or deformed.

Together, these two factors squarely contribute to the problem of achieving the ideal condition within a three-phase machine, which is crucial for optimal performance. Thus, the answer that