Experimental results
In Figure 4 the measured polarization and
depolarization currents for a new factory
produced stator bar at U
=2 kV (≈1.11 kV/mm)
are plotted in a log-log scale. This measurement
was done at room temperature (RT ≈ 23°C). The
sign of the depolarization current values have
been changed, thus both polarization and
depolarization current values are positive. The
noise in the polarisation current curve is from the
voltage source.