motor load from current FFT analysis

[Tmoose]

I did a few searches for current analysis and came up empty.

We have several 100 HP agitators that have broken teeth in their 12-1 double reduction gearboxes. There is vibration very apparent all over the place at blade pass ( around 284 cpm ).

Would you expect basic current analysis with a clamp on probe, resistor, and IRD/CSI etc data collector on the 460 v, 121 FLA induction motors to reflect "instantaneous" load variations, for instance at Blade pass frequency?

thanks

Dan T

 

[IceStationZebra]

google "motor current signature analysis" ISZ

 

[IceStationZebra]

I also found a paper on exactly what you are looking for, but you need to purchase it.

"Monitoring gear vibrations through motor current signature analysis and wavelet transform." by Chinmaya Kar and A.R. Mohanty

ISZ

 

[FeX32]

Not if you are me you don't need to purchase it

Here ya go.


Fe

 

[Tmoose]

thanks Fe - looks like a creative use for an old varnished up car transmission in their test rig.

 

[FeX32]

No problem.
Yea, it does look creative, hope it helps!


Fe