The highest peak observed on a large 6-pole motor running a direct drive axial fan in cleanroom service is .122 at exactly 3600 cpm/60 Hz. The motor rotational rate is 1195 rpm. The data was collected when the motor was being driven by a VFD, operating at full speed, (60 Hz.) When the motor is...
I recently encountered a large 6-pole induction motor driving a vaneaxial fan in cleanroom service. The motor was tested at full speed/60 hz through the VFD. The highest spectral feature was a .112 ips peak exactly at 30 Hz. (I had sufficient resolution to determine that this was not 3 X M. When...
I have recently been seeing a number of Browning "B5V" sheaves used in air handler applications. The claim is made by the manufacturer that these are usable with both standard and narrow belt profiles. It would seem that it must be a compromise, fitting neither well, and in addition, it is...
Does anyone have experience with using vibration analysis on the drive mechanisms of tracking antenna systems? Is it effective in detecting common failure modes? (Not concerned with structural vibration, modal studies, etc.)
Thanks for any input!
