Do you think good help in electric problem?
Personally, no.
Looking at [link file:///C:/Users/schimppw/Downloads/State_of_Flux.pdf]the CSI paper[/url], what are they trying to detect?
The tests were designed to evaluate turn-to-turn shorts, of differing severity, and changes in voltage balance (for the 50 hp motor only) at different sensor locations about the motors
Shorted turns - with very few exceptions (there are a few isolated exceptions I've heard of on ungrounded system random wound machines), shorted turns progress generally progress quickly due to autotransformer effect causing large heating leating quickly to ground fault and motor trip. It's not very useful to monitor for something that will be apparent within a few seconds after you detect it.
Unbalanced voltages. I'd rather measure the voltages or compare the three phase currents. Failing that, vibration twice line frequency would probably increase (and I monitor vibration anyway, for reasons that are much more useful, like bearings). But I wouldn't want to have to get into the business of evaluating every vibration or flux change that might indicate voltage unbalance, unless there was some overheating, tripping, or abnormal currents noted.
The linked paper seems to be a research type paper. It's dated 2009, yet many years later this monitoring approach hasn't taken off for induction motors (something similar is used for shorted turns on sync generators I believe... big difference is that sync generator rotor circuit shorted turns can last a long time since the rotor circuit is dc and not subject to the autotransformer effect as induction motor stator). I don't see prominent mention (marketing) of flux monitoring technology in the literature of Emerson (successor to CSI) although they do provide a compatibility for gathering this data within their AMS condition monitoring software. Sensitivity depends on sensor location.
Color me skeptical.
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(2B)+(2B)' ?
