Mitsubishi MELDAS MDS-C1 Instruction Manual page 190

(3) Inductive voltage compensation
The current loop response is improved by compensating the back electromotive force element
induced by the motor rotation. This improved the current command efficiency, and allows the
acceleration/deceleration time constant to the shortened.
<Adjustment method>
1. While accelerating/decelerating at rapid traverse, adjust the inductive voltage compensation
gain (SV047: EC) so that the current FB peak is a few % smaller than the current command
peak.
Speed command
(r/min)
Current
command
(Rated current %)
No. Abbrev. Parameter name
SV047 EC Inductive voltage
compensation gain
POINT
4. Servo Adjustment
3000
0
-3000
No inductive voltage
compensation
200
0
With inductive
voltage
-200
compensation
Inductive voltage compensation
Set the inductive voltage compensation gain. Set to "100" as a standard.
If the current FB peak exceeds the current command peak, lower the gain.
If the current FB peak becomes larger than the current command peak (over
compensation), an overcurrent (alarm 3A) will occur easily. Note that over
compensation will occur easily if the load inertia is large.
Explanation
4 - 19
Time
Time
Setting range
0 to 200
(%)