160
Degressive torque feature
Set
value 9
50.00Hz
Set
value 10
50.00Hz
Set
value 11
60.00Hz
Set value
12
60.00Hz
To compensate the low-frequency torque features, certain increase compensation can be provided for the
output voltage. P07.07 is relative to the maximum output voltage. When it is set as 0, it is automatic
torque increase; when it is set as a non-zero value, it is manual torque increase, as shown in Fig.6-27.
P07.08 is used to define the percentage of the cut-off frequency for the manual torque increase relative to
the basic running frequency. Please refer to the fz in Fig.6-27. The cut-off frequency is applicable to any
V/F curve determined by P07.00.
: Manual torque boost Vmax: Max output voltage
: Cut-off freq. for torque boost
: Basic operating freq.
Output
voltage
f
b
V
b
V
max
Output
freq.
f
z
V
b
f
z
f
b
Fig. 6-27 Torque increase (the increase amount is the shaded part)
Note
1. Improper setting of this parameter may cause motor over-temperature or over-current protection.
2. For the definition of fz, please refer to function code P07.08.
3. When driving the synchronous motor, it is recommended to use the manual torque increase mode and
adjust the V/F curves according to the motor parameters and relevant applications.
4. The maximum output voltage Vmax corresponds to the motor rated voltage, so it is necessary to correctly
set the motor rated voltage based on the motor selected .
Motor 2 V/F curve setting
0~19
0
P07.09
Motor 1 torque increase cut-off point
0.0~50.0%
10.0%
P07.08
Motor 1 torque increase
0.0~30.0%
0.0%
P07.07
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