132
In auto torque boost mode, this parameter is used to adjust response speed of torque compensation. The greater of this
set value, the slower of the response speed, and the steadier the motor speed.
F5.12
Separated type V/F control selection
0
~
3
0
0
:
VF half separated mode, open loop voltage output
In this control mode, VFD starts in normal V/F curve, and adjusts voltage to value of set target voltage after
reaching set frequency point. No feedback for voltage in this mode, and the target voltage value is open loop setting.
Fig. F5-4 Voltage Control Mode 0
F0——set frequency, V0—corresponding rated voltage of set frequency, U*/U1*—F5.13setting value of given channel.
As showed in the above figure, the voltage is adjusted after stabilization of point a frequency. According to value of target
voltage and input voltage, the voltage point may move towards point b (increase) or point c (decrease), until reaching
target value.
1
:
VF half separated mode, voltage closed-loop output
The only difference of this mode from mode 0 is that it introduced voltage closed-loop. Through PI adjustment of
deviation of feedback voltage compared with set voltage, a steadier voltage can be acquired. This method can
compensate target voltage deviation caused by load change, so as to acquire a higher precision of voltage control and a