N5: Feed Forward Control - YASKAWA GA700 Series Technical Manual
Ac drive for industrial applications
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12.10 n: Special Adjustment
◆
n5: Feed Forward Control
Feed forward control increases the responsiveness of acceleration and deceleration as specified by the speed
reference.
Increase C5-01 and C5-03 [ASR Proportional Gain] to apply feed forward control to machines that have low
rigidity and are possible to have hunting and vibration or to machines that have a large quantity of inertia. When
you use this function in CLV control, it also helps prevent overshoot. Refer to
12.148
for more information about parameters related to feed forward control.
Set A1-02 [Control Method Selection] to one of these values to enable feed forward control:
• 3: Closed Loop Vector Control
• 4: Advanced OpenLoop Vector Control
• 6: PM Advanced Open Loop Vector
• 7: PM Closed Loop Vector Control
Note:
• You cannot use feed forward control to increase responsiveness in applications where you apply loads externally during run at constant
speed.
• When you use the Droop control function, set n5-01 = 0 [Feed Forward Control Selection = Disabled].
• You cannot use feed forward control with motor 2.
■
Before You Use Feed Forward Control
Do one of these procedures before you use feed forward control.
• Run Auto-Tuning to set motor parameters.
When you cannot do Auto-Tuning, manually set motor parameters with the information on the motor nameplate
or test reports. Set the E2 parameters for induction motors. Set the E5 parameters for PM motors.
• Set C5 parameters [Automatic Speed Regulator (ASR)] individually to adjust the speed control loop (ASR).
• If you can connect a motor to a machine and rotate it during Auto-Tuning, do Inertia Tuning.
The drive automatically adjusts feed forward parameters during Inertia Tuning.
• If you cannot do Inertia Tuning, refer to
individually.
928
Figure 12.147 Suppress Overshooting with Feed Forward Control
Figure 12.148 Configure Feed Forward Control
Figure 12.148
Figure
and set the parameters related to feed forward control
YASKAWA SIEPC71061705H GA700 Series Technical Manual
12.147. Refer to
Figure
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