Abstract The bearing fault will firstly generate torque fluctuation, then magnetic field in motor is affected, lastly partial bearing fault feature is transferred into stator current. Because of the bearing fault feature is more obvious in magnetic field than those in stator current, the magnetic field frequency feature of the bearing fault is researched. The magnetic field characteristic frequency expression is deduced considering a multiple modulation between torque fluctuation frequency, power supply harmonics, and slot harmonics. The above expression is verified by finite element analysis. Using four search coils which are inserted inside the stator slot to research the magnetic field frequency feature at the actually bearing fault condition, and results verify that the proposed method based on magnetic field frequency feature is feasible and effective.
Research on Magnetic Field Frequency Feature for Motor Bearing Fault
1st ed. 2016
2016-01-01
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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