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To operate at a parallel resonance (impedance maxima), the phase controller gain must be negative
to create a stable operating point.
Applications with high losses, i.e. low quality factor, may have a non-zero impedance phase angle at
resonance, e.g. 45 degrees. In such cases, an impedance response should be performed first, to
identify the desired operating phase that corresponds to the desired mechanical resonance.
PDUS210 V5 Manual
11
Modified 17/12/2022
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