Title :
Line-Frequency Magnetic Vibration of A-C Machines
fDate :
4/1/1962 12:00:00 AM
Abstract :
All a-c machines having a rotating magnetic field in the air gap are subject not only to the usual "twice-line-Frequency" magnetic vibration but also to a vibration at line frequency itself. It is shown both mathematically and by physical reasoning that this vibration arises as a subharmonic response to a twice-line-frequency variation of the unbalanced magnetic pull. When combined with a condition of mechanical resonance this vibration can become extremely severe.
Keywords :
Circuit faults; Circuit testing; Electrical equipment industry; Frequency; Impedance; Magnetic fields; Magnetic resonance; Rotors; Stators; Vibrations;
Journal_Title :
Power Apparatus and Systems, Part III. Transactions of the American Institute of Electrical Engineers
DOI :
10.1109/AIEEPAS.1962.4501389
