I have collected loads of power data from a 3-phase CNC machine and it all looks like this:
The 3-phase active and reactive powers can be seen above, as well as the Q (reactive) - P (active) difference.
My question is, does the relationship between the 2 powers make sense? They seem to be highly correlated and the reactive seems to have a higher increase when the cutting is happening (which is correct I guess, since that's when the spindle motor is spinning, so a magnetic field is generated.)
But I would like someone with more experience to explain if we always expect to see this kind of correlation in powers when a resistive and an inductive load are present or there should be a higher fluctuation of the reactive because of constant changes in the magnetic field.
Edit: This is the previous picture with the addition of the absolute apparent power |S| and a scaled (x10000) power factor that I calculated.
Can it be that the power factor increases when the cutting is happening?