Chapter6 P3
V/F
control parameter
65
as the target speed under the rated load. When the motor speed is different from the target
value, the gain needs to be fine-tuned appropriately.
P3-10
VF Overexcitation gain
0
～
200
Default
：
64
During the deceleration, the overexcitation control can suppress the rise of the bus
voltage and avoid overvoltage faults. The larger the overexcitation gain, the stronger the
suppression effect.
In the case where the inverter is easy to overvoltage alarm during the deceleration
process, it is necessary to increase the overexcitation gain. However, the overexcitation
gain is too large, which tends to cause an increase in the output current, which needs to be
weighed in the application.
For applications where the inertia is small, there is no voltage rise during motor
deceleration. It is recommended to set the overexcitation gain to 0. For those with braking
resistors, it is also recommended to set the overexcitation gain to 0.
P3-11
VF
Oscillation
suppression gain
0
～
100
depend
The selection method of the gain is as small as possible under the premise of
effectively suppressing the oscillation, so as to avoid adversely affecting the operation of
the VF. Select this gain to be 0 when there is no oscillation in the motor. Only when the
motor oscillates obviously, the gain needs to be appropriately increased. The larger the
gain, the more obvious the suppression of the oscillation. When using the suppression
oscillation function, the motor rated current and no-load current parameters are required to
be accurate, otherwise the VF oscillation suppression effect is not good.
P3-13
VF separated voltage
source
0: Digital setting (P3-14) 1: AI1 2: AI2 3: AI3 4:
Pulse setting (X6) 5: Multi-speed
6: Simple PLC 7: PID 8: Communication
reference (100.0% corresponds to rated voltage)
Default
：
0
P3-14
VF separation
voltage digital setting 0V ~ motor rated voltage
Default
：
0V
VF separation is generally used in induction heating, inverter power supply and torque
motor control.
When VF separation control is selected, the output voltage can be set by function code
P3-14, or it can be from analog quantity, multi-segment instruction, PLC, PID or
communication reference. When using non-digital setting, 100% of each setting
corresponds to the rated voltage of the motor. When the percentage of the output setting
such as analog quantity is negative, the set absolute value is used as the effective
setting value.
0: Digital setting (P3-14) The voltage is set directly by P3-14.
1: AI1 2: AI2 3: The AI3 voltage is determined by the analog input terminal.
4: Pulse setting The voltage reference is given by the terminal pulse.
5: Multi-segment command When the voltage source is a multi-segment command, set