P3 V/F Control Parameter - Veikong VFD200A Series Operation Manual

P2-15 Torque adjustment proportional gain
P2-16 Torque adjustment integral gain
 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
 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.
Weak magnetic zone maximum torque
P2-21
factor
 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
P2-21 appropriately; when the motor runs at 2 times the rated frequency and the speed drops greatly,
increase P2-21 appropriately. Generally no need to change.

P3 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 V/F Curve setting
 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.
11: V/F semi-separation mode. In this mode, V is proportional to F, but the proportional relationship
can be set by P3-13, and the relationship between V and F is also related to the rated voltage and rated
frequency of the motor of P1 group.
Assuming that the voltage source input is X (X is 0~100%), the relationship between the inverter
Chapter 6 Parameter Instruction
0～60000
0～60000
100%~110%
50%~200%
0: Straight line V/F
2: square V/F
4: 1.4 power V/F
8: 1.8 power V/F
10: V/F complete separation mode
11: V/F semi-separation mode
1: Multi-point V/F
3: 1.2 power V/F
6: 1.6 power V/F
9: reserved
56
Default：2000
Default：1300
Default：105%
Default：100%
Default：0