Make a U/f characteristic based on 6 definable voltages and frequencies. See figure below.
Frequency Point
P 4.4.3.2 [x]
P 4.4.3.1 [3]
P 4.4.3.1 [2]
P 4.4.3.1 [1]
P 4.4.3.1 [0]
P 4.4.3.2
[1]
P 4.4.3.2
[2]
P 4.4.3.2
[3]
P 4.4.3.2
[4]
P 4.4.3.2
[5]
e30bk133.10
Figure 70: Example of U/f Characteristic
7.5.3.4 Dependent Setting (Menu Index 4.4.4)
P 4.4.4.1 Slip Comp. Gain
Enter the % value for slip compensation to compensate for tolerances in the value of n
M,N
. Slip compensation is calculated automatically,
that is, based on the rated motor speed n
M,N
. This function is not active when P 5.4.2 Configuration Mode is set to [1] Speed closed loop,
[2] Torque closed loop, or [4] Torque open loop, or when P 5.4.3 Motor Control Principle is set to [0] U/f, or when P 4.2.1.1 Motor Type is
set to [1] PM, Non-salient SPM or [3] PM, Salient IPM.
Default value: Size Related Parameter type: Range (Size Related)
Parameter
number:
162 Unit: %
Data type: int16 Access type: Read/Write
P 4.4.4.2 Slip Comp. Time Constant
Enter the slip compensation reaction speed. A high value results in slow reaction, and a low value results in quick reaction. If low-
frequency resonance problems occur, use a longer time setting.
Default value: 0.10 Parameter type: Range (0.05–5.00)
Parameter
number:
163 Unit: s
Data type: uint16 Access type: Read/Write
P 4.4.4.3 High 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:
161 Unit: %
Data type: int16 Access type: Read/Write
132 | Danfoss A/S © 2024.03 AB413939445838en-000301 / 130R1254
Application Guide | iC2-Micro Frequency Converters
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