Danfoss iC2 - Page 133

Application Guide | iC2-Micro Frequency Converters
P 4.4.4.4 Low Speed Load Comp.
Enter the % value to compensate voltage in relation to load when the motor is running at high speed and obtain the optimum U/f
characteristic. The motor size determines the frequency range within which this parameter is active.
Default value: 100 Parameter type: Range (0–300)
Parameter
number:
160 Unit: %
Data type: int16 Access type: Read/Write
P 4.4.4.5 Res. Damp Gain
Enter the resonance damping value. Use the parameter and P 4.4.4.6 Res. Damp High Pass Time Constant to help eliminate high
frequency resonance problems. To reduce resonance oscillation, increase the value of P 4.4.4.5 Res. Damp Gain.
Default value: Size Related Parameter type: Range (0–500)
Parameter
number:
164 Unit: %
Data type: uint16 Access type: Read/Write
P 4.4.4.6 Res. Damp High Pass Time Constant
Set the parameter and P 4.4.4.5 Res. Damp Gain to help eliminate high frequency resonance problems. Enter the time constant that
provides the best dampening.
Default value: Size Related Parameter type: Range (Size Related)
Parameter
number:
165 Unit: s
Data type: uint16 Access type: Read/Write
P 4.4.4.7 Damping Gain
The damping gain stabilizes the PM machine to run the PM machine smooth and stable. The value of Damping gain controls the
dynamic performance of the PM machine. High damping gain gives low dynamic performance and low damping gain give high dynamic
performance. The dynamic performance is related to the machine data and load type. When the damping gain is too high or low the
control becomes unstable.
Default value: 120 Parameter type: Range (Size Related)
Parameter
number:
114 Unit: %
Data type: int16 Access type: Read/Write
P 4.4.4.8 High Speed Filter Time Const.
This time constant is used above 10% rated speed. Obtain quick control through a short damping time constant. However, if this value is
too short, the control gets unstable.
Default value: Size Related Parameter type: Range (Size Related)
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