Yaskawa G5HHP Drive - Manual (Page 216)

Advanced Operation
7.5.2 Tuning Constants: C
7 - 52
Slip Compensation Selection During Regeneration: C3-04
User
Change
during Setting Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
C3-04
Slip compensation
selection during re-
generation
x 0, 1 -- 0 A A A x
D
Settings
Setting Contents
0 Slip compensation disabled during regeneration
1 Slip compensation enabled during regeneration
D
Constant C3-04 enables or disables slip compensation during regeneration.
D
The amount of regeneration is momentarily increased when this function is used, so some control option
(e.g., Braking resistor, Braking Resistor Unit, Braking Unit) may be required.
J
Torque Compensation Function: C4-01, C4-02
The torque compensation function detects increases in the motor load, and increases the output torque to
compensate.
Torque Compensation Gain: C4-01
User
Change
during Setting Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
C4-01
Torque compensation
gain
x 0.00 to 2.50 Mul-
tiple
1.00 B B B x
D
This constant can be changed during operation, but normally no adjustments are required. Make adjust-
ments in the following cases under the V/f control mode:
•
If the wiring distance between the Inverter and the motor is long, raise the setting.
•
If the motor capacity is less than the Inverter capacity (the maximum application motor capacity),
raise the setting.
•
If the motor generates excessive oscillation, lower the setting.
D
Set the torque compensation gain so that the output current at low-speed rotation does not exceed 50%
of the Inverter’s rated output current.
D
Do not adjust the setting of this constant for open-loop vector control.
Torque Compensation Time Constant: C4-02
User
Change
during Setting Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
C4-02
Torque compensation
time constant
x 0 to 10000 ms 20 * A A A x
* When the control method is switched, the factory setting changes as follows:
V/f control: 200; V/f with PG: 200; open-loop vector: 20
D
The torque compensation time constant does not normally need to be adjusted, but make adjustments
in the following cases:
•
If the motor generates excessive oscillation, raise the setting.
•
If motor responsiveness is low, lower the setting.
7