This system can determine the size of the
airgap between the two pieces.
The works have approached mainly the detection of open phase fault [1, 7]; stator winding inter-turn short circuit [3, 8, 9]; rotor demagnetization [2, 10]; mechanical misalignment; mechanical unbalance [11];
airgap eccentricity [12, 13]; bearing fault [14]; and motor drive faults [15].
The brake incorporated a custom flange and reverse mounted brake hub, to keep the overall length as compact as possible, this allowed the brake
airgap to be pre-set by SG Transmission.
However, asymmetrical magnetic pull caused by
airgap eccentricity yields unbalanced radial force; this unbalanced radial force is recognized as one of the main reasons for the SRM vibration [1-5].
Reasonable agreement between the simulated and measured results is observed, with the discrepancy caused by experimental tolerances and imperfections including the inevitable
airgap between the two substrates.
The aligned rotor position has low
airgap and has low reluctance.