control mode for synchronous motors, you can set
the value of this function code to P03.10.
Range: 0–65535
Note: Set the value to 0 if motor parameter
autotuning is not performed.
This group of function code defines the V/F curve
of motor 1 to satisfy different load characteristics
needs.
0: Straight V/F curve; fit for constant-torque load
1: Multi-point V/F curve
2: Torque down V/F curve (power of 1.3)
3: Torque down V/F curve (power of 1.7)
4: Torque down V/F curve (power of 2.0)
Curve 2–4 is suitable for torque-variable load of
fan pump and similar equipment. You can make
adjustment based on load characteristics to
achieve optimal energy-saving effect.
5: Customized V/F (V/F separation); under this
mode, V is separated from f. You can adjust f
through the frequency reference channel set by
P00.06 to change the curve characteristic or adjust
V through the voltage reference channel set by
P04.27 to change the curve characteristics.
Note: The V
b
in the figure below corresponds to
rated motor voltage, and f
b
corresponds to rated
motor frequency.
Output voltage
Output frequency
Linear type
Square type
Torque step-down V/F curve (power of 1.3)
Torque step-down V/F curve (power of 1.7)
Torque step-down V/F curve (power of 2.0)
V
b
f
b
To compensate for low-frequency torque
characteristics, you can make some boost
compensation to the output voltage. P04.01 is
relative to the maximum output voltage V
b.
P04.02 defines the percentage of cut-off frequency
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