YASKAWA GA800 Programming Manual page 495

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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.
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n5-01: Feed Forward Control Selection
No.
Name
(Hex.)
n5-01 Feed Forward Control
Selection
(05B0)
0 : Disabled
1 : Enabled
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n5-02: Motor Inertia Acceleration Time
No.
Name
(Hex.)
n5-02 Motor Inertia Acceleration
Time
(05B1)
If you cannot do Inertia Tuning, calculate the motor acceleration time as shown here or measure the motor
acceleration time and set n5-02 to this value.
Calculate the Motor Acceleration Time
Use this formula to find the motor acceleration time:
• J = Moment of inertia of motor (kg m
Motor
• n = Motor rated speed (min
rated
• T
= Motor rated torque (N m)
rated
You can also use this formula to find the motor acceleration time:
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
Figure 2.145 Configure Feed Forward Control
Figure 2.145 and set the parameters related to feed forward control
V/f CL-V/f OLV CLV AOLV
Sets the feed forward function.
V/f CL-V/f OLV CLV AOLV
Sets the length of time for the motor to accelerate from the stopped to the maximum frequency with a
single motor at the rated torque. Inertia Tuning automatically sets the motor acceleration time.
2 )
-1 , r/min)
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
2.10 n: Special Adjustment
Default
(Range)
0
(0, 1)
Default
(Range)
Determined by C6-01, E5-
01, and o2-04
(0.001 - 10.000 s)
2
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