Air-gap Flux Probe Data Testing Animation
Real Data Animation from No-Load to Full Load
This animation displays real data collected from a generator while running the machine from no-load up to full load. The flux density zero-crossing (green line) moves from the quadrature axis to the leading # 1 coil slot. Note the use of negative MVARS (decreasing field current) in the last load point in order to move the flux density zero-crossing over the #1 lead slot). The maximum sensitivity for detecting turn-shorts in coils corresponds with the position of the flux density zero-crossing. For example, the maximum sensitivity for detecting shorted turns in Coil #5 is found in the load point data whose flux density zero-crossing aligns with the lead slot of Coil #5.
==========================================The figure below shows an animation of real generator data collected from no-load to a full load condition. The figure is displaying overlays of the two poles' leading slots signal, along with the location of the flux density zero-crossing. Notice how the shorted-turn in coil #5-pole A is visible when the flux density zero-crossing is near that coil, but disappears when the flux density zero-crossing moves away from the coil. This illustrates the need to collect a series of load points designed to move the flux density zero-crossing from the quadrature axis to the #1 leading coil slot in order to pick up potential shorted-turns in each of the rotor coils.
Leading Slots Overlay Animation
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