Interactive ESA/MCSA spectra at the end of this post.
These interactive charts go along with the following https://theramreview.com articles:
More can be found in the associated code presented in the blogs on this website.
The motor is a 1hp, 1765rpm, 460V, 60Hz motor. The data collected was at 12kHz sampling rate, 3 averages, and 65,536 block with the low frequency dataset sampling to allow 180Hz spectra and the high frequency to 6kHz. The motor has 28 rotor bars and 36 stator slots. With this information can you evaluate this machine?
For the following the graphics are interactive – you can scroll over the data to get frequency and -dB and you can left click and drag over portions of the spectra to zoom in. Reset by refreshing your screen or use the tools that pop up while your mouse is over the spectra (the home button) – note you can also screen capture and download an image. Both the high resolution 180 Hz and the 6kHz (sampled down to 1500 Hz, which is more than enough for any defects in this machine) follow.
First is the low frequency data set. What is the true running speed of this motor?
Next is the high frequency dataset which we’ve limited to 1500 Hz to cover everything including eccentricity and stator slot issues. What can you find based upon our articles in ESA or your experience with programs such as vibration? Enjoy!
