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P64 U2 [ASM, - -]
Specific values: V_nom
- The value of the rated motor voltage from P92-V_mot_nom is used
Minimum value: 1 V
Maximum value: 60 V
Factory setting: V_nom
P65 f3 [ASM, - -]
V/Hz-characteristic: Frequency of characteristic point KP3
Specific values: f_nom
- The value of the rated motor frequency from P91-f_mot_nom is used
Minimum value: 30 Hz
Maximum value: 4,000 Hz
Factory setting: f_nom
P66 U3 [ASM, - -]
V/Hz-characterstic: Voltage of characteristic point KP3
Specific values: V_nom
- The value of the rated motor voltage from P92-V_mot_nom is used
Minimum value: 1 V
Maximum value: 60 V
Factory setting: V_nom
8.12 Control
P70 control [ASM, -, -]
Selection of the speed control for ASM motors
Values: V/Hz table
- Voltage control via V/Hz table, no rise
- I*R-load-comp
- I*R and load compensation, the motor voltage is adapted as a function of the load.
The parameters P71-I*R-factor, P72-loadcomp. and P73-komp-t_filt should be set.
Factory setting: V/Hz table
P71 I*R-factor [ASM, -, -]
Factor of the I*R compensation, the inverter output voltage is adapted as a function of the motor load. The
aim of the I*R compensation is to keep the magnetic flux in the motor constant. The I*R compensation is
effective in particular at low speeds or low voltages, and the speeds decrease less sharply under load.
The I*R factor corresponds to the ohmic resistance of the motor, measured between two motor cables.
U = P71-I*R-factor * (P18-I_mot - (P93-I_mot_nom * P94-cos_phi)
V_mot = U_table + U
U_table corresponds to the V/Hz table voltage, calculated from the values P60...P66
Specific values: Off - I*R compensation switched off
Minimum value: 0.1 V/A (slight rise)
Maximum value: 10 V/A
Factory setting: Off
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