Contents

Improving the Operation Performance
•Adjustments
The Slip compensation values can be set separately for motoring and regenerative operation. Before adjusting
this function the general setup should have been done (Motor Setup, V/f pattern, Speeds, ASR settings etc.).
To adjust the Slip compensation function do the following in motoring and regenerative mode:
• Set the motor speed in S2-01 if V/f control is used.
• Try to measure the actual motor speed during leveling.
• If the motor speed is lower than the leveling speed reference increase S2-02 in motoring mode or decrease
S2-03 in regenerative mode.
• If the motor speed is higher than the leveling speed reference decrease S2-02 in motoring mode or increase
S2-03 in regenerative mode.
Field Forcing
The field forcing function controls the motor flux and compensates the flux establishment delay of the motor.
Thereby it improves the motor responsiveness on changes in the speed reference or the load.
Field forcing is applied during all operation conditions except DC Injection.
Using parameter d6-06 a field forcing limit can be applied. A setting of 100% is equal to the no-load current
set in parameter E2-03.
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•Related Parameters
Parameter
No.
Name
Factory
Setting
Change
during
Operation
V/f
Control Methods
Open
Loop
Vector
d6-03 Field forcing selection 0 No No No A
d6-06 Field forcing limit 400% No No A A
Closed
Loop
Vector
Adjusting DC injection current level
When Open Loop Vector control mode is used, the DC injection current level at stop for motoring and regenerative
operation can be adjusted individually. The motor condition (Regenerative or motoring) is detected
when the inverter is running at another speed than leveling speed.
The function can be used to improve the stopping behavior.
•Related Parameters
Parameter
No.
Name
Factory
Setting
Change
during
Operation
V/f
Control Methods
Open
Loop
Vector
Closed
Loop
Vector
S1-17 DC injection current regenerative 100% No No A No
S1-18 DC injection current motoring 20% No No A No
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