N5: Feed Forward Control - YASKAWA GA700 Technical Manual

11.10 n: Special Adjustment
1 : With PG
■
n4-74: Limit of Flux loop
No.
Name
(Hex.)
n4-74 Limit of Flux loop
(1B8E)
Increase the setting value in 20% increments when the torque is insufficient due to loads of at least 100%. Note
that if the setting is too high, overexcitation could occur causing the motor generate heat.
◆

n5: Feed Forward Control

Feed forward control improves responsiveness of acceleration and deceleration in accordance with the speed
reference.
Increasing the values set in C5-01 and C5-03 [ASR Proportional Gain] is effective in applying feed forward
control to machines with low rigidity for which hunting and vibration are likely to occur or to machines with
significant inertia. Applying this function while using CLV control also helps prevent overshooting. Refer to
Figure 11.139 for details. Refer to
control.
Feed forward control is enabled when A1-02 [Control Method Selection] is set to any of the following.
• 3: Closed Loop Vector Control
• 4: Advanced OpenLoop Vector Control
• 6: PM Advanced Open Loop Vector
• 7: PM Closed Loop Vector Control
Note:
• Responsiveness cannot be improved with feed forward control for applications in which loads are applied externally during run at
constant speed.
• When using the Droop control function, set n5-01 = 0 [Feed Forward Control Selection = Disabled].
• Feed forward control cannot be used with motor 2.
884
V/f CL-V/f OLV
Sets the control level for flux loop control output.
Figure 11.140 for more information on parameters related to feed forward
Figure 11.139 Suppress Overshooting with Feed Forward Control
Figure 11.140 Configure Feed Forward Control
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Description
CLV AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default Setting
(Range)
160%
(100 to 500%)