Inovance MD800 Series - Vector Control Slip Auto-Tuning; Over-Excitation in Vector Control Mode

Function Applications
-485-
Para.
No.
Name
Default
Value Range Description
F2-05
Switchover
frequency 2
10.00 Hz
F2-02 to the
maximum
frequency
The speed loop PI parameters are divided into two
groups: low speed and high speed. When the running
frequency is lower than switchover frequency 1 (F2-
02), the speed loop PI is adjusted by F2-00 and F2-01.
When the running frequency is higher than switchover
frequency 2 (F2-05), the speed loop PI is adjusted by
F2-03 and F3-04. When the running frequency falls
between switchover frequency 1 and switchover
frequency 2, PI parameters are obtained from linear
switchover between the two groups of PI parameters.
The value of this parameter must be smaller than
F2-05 (switchover frequency 2).
F2-07
Speed
feedback
filter time
0.004s 0.000s to 0.100s
In SVC control mode (F0-01 = 0), the speed loop
feedback filter time is valid. You can improve the
stability of the motor by adjusting this parameter.
Increasing the speed loop feedback filter time can
enhance motor stability but slow down dynamic
response. Decreasing it will bring faster dynamic
response. An excessively small parameter value may
lead to motor oscillation.
Generally, the motor stability meets requirements,
and no adjustment is required.
4.4.5 Vector Control Slip Auto-tuning
In vector control mode (F0-01 = 0), this parameter is used to adjust the speed stability accuracy of the
motor. For example, when the running frequency of the motor is lower than the output frequency of
the AC drive, you can increase the value of this parameter.
Note: No adjustment is required under normal circumstances.
Para. No. Name
Default
Value Range Description
F2-06
VC slip
compensation
gain
100% 50% to 200%
In SVC control mode, this parameter is used to
adjust the speed stability accuracy of the motor.
For example, when the running frequency of the
motor is lower than the output frequency of the
AC drive, you can increase the value of this
parameter.
4.4.6 Over-Excitation in Vector Control Mode
For high-inertia loads, vector control over-excitation can speed up the motor deceleration. A larger
over-excitation gain means better improvement. However, vector control over-excitation increases the
output current of the AC drive.
Para. No. Function Default
Value Range Description
F2-08
VC deceleration over-
excitation gain
64 0 to 200 -