Resonance Damping - Siemens SINAMICS S120 Function Manual

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Resonance damping

Function description

The resonance damping function dampens active current oscillations that can occur under no-

load conditions. Resonance damping is active in a range between 5% and 90% of the rated

motor frequency (p0310), but only up to 45 Hz.

Maximum frequency resonance damping

When p1349 = 0, the changeover limit is automatically set to 95% of the rated motor frequency,

but only up to a maximum of 45 Hz.

The following figure shows the signal curve of the function.

Function diagrams (see SINAMICS S120/S150 List Manual)

Overview of important parameters (see SINAMICS S120/S150 List Manual)

● p0310[0...n]

● p1338[0...n]

● p1339[0...n]

● p1349[0...n]

Drive functions

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

Vector control - Resonance damping and slip compensation

CO: Output frequency

CO: Torque-generating actual current value

Rated motor frequency

U/f mode resonance damping gain

U/f mode resonance damping filter time constant

Maximum frequency

U/f control (vector control)

7.4 Resonance damping