INVT CHF100A-004G-2, Operation Manual

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CHF100A series high performance universal inverter
.51.
2~4: Torque_stepdown curve. It is applicable for variable torque load, such as blower,
pump and so on. Please refer to following figure.
Notice
：
Vb= Motor rated voltage Fb= Motor rated frequency.
Figure 6.8 V/F curve.
Function
Code
Name Description
Setting
Range
Factory
Setting
P4.01 Torque boost
0.0%: (auto)
0.1
％
~10.0
％
0.0~10.0 0.0
％
P4.02
Torque boost
cut-off
0.0%~50.0% (motor rated
frequency)
0.0~50.0 20.0%
Torque boost will take effect when output frequency is less than cut-off frequency of
torque boost (P4.02). Torque boost can improve the torque performance of V/F control at
low speed.
The value of torque boost should be determined by the load. The heavier the load, the
larger the value.
Notice: This value should not be too large, otherwise the motor would be
over-heat or the inverter would be tripped by over-current or over-load.
If P4.01 is set to be 0, the inverter will boost the output torque according to the load
automatically. Please refer to following diagram.