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Chapter6
P2
vector control parameter
The vector control current loop PI adjusts the parameter, which is automatically
obtained after the asynchronous machine is fully tuned, and generally does not need to be
modified.
Need to be reminded that the integral regulator of the current loop does not use the
integration time as the dimension, but directly sets the integral gain. The current loop PI
gain setting is too large, which may cause the entire control loop to oscillate, so when the
current oscillation or torque fluctuation is large, the PI proportional gain or integral gain can
be manually reduced.
P2-20
Maximum
output
voltage coefficient
100%~110%
Default
：
105%
The maximum output voltage coefficient indicates the boosting capacity of the
maximum output voltage of the inverter. Increasing the F2-20 can increase the
maximum load capacity of the weak field of the motor, but the increase of the motor
current ripple will increase the heat generated by the motor; otherwise, the maximum
band of the weak field of the motor The load capacity will decrease, but the motor
current ripple will decrease, which will reduce the heat generated by the motor.
Generally no adjustment required.
P2-21
Weak
magnetic
zone
maximum
torque factor
50%~200%
Default
：
100%
This parameter only takes effect when the motor is running above the rated
frequency. When the motor needs to accelerate to 2 times the rated motor frequency and
the actual acceleration time is longer, reduce F2-21 appropriately; when the motor runs at 2
times the rated frequency and the speed drops greatly, increase F2-21 appropriately.
Generally no need to change
。
P3 Group V/F control parameter
This group of function codes is valid only for V/F control and invalid for vector control. V/F
control is suitable for general-purpose loads such as fans and pumps, or an inverter with
multiple motors, or applications with large differences in inverter power and motor power.
。
P3-00
VF Curve setting
0: Straight line V/F 1: Multi-point V/F
2: square V/F 3: 1.2 power V/F
4: 1.4 power V/F 6: 1.6 power V/F
8: 1.8 power V/F 9: reserved
10: V/F complete separation mode
11: V/F semi-separation mode
Default
：
0
0
：
Straight line V/F. Suitable for ordinary constant torque loads.
1: Multi-point V/F. Suitable for loads such as dehydrators and centrifuges. Set the P3-
03~P3-08 parameters to get any V/F curve.
2: square V/F. Suitable for centrifugal loads such as fans and pumps.
3~8: V/F relationship between straight line V/F and square V/F.
10: V/F complete separation mode. At this time, the output frequency of the inverter is
independent of the output voltage, the output frequency is determined by the
frequency source, and the output voltage is determined by P3-13. Generally used in
induction heating, inverter power, torque motors and other occasions.
