YASKAWA GA700 Technical Manual page 761

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C4-06: Motor 2 Torque Comp Delay Time
No.
Name
(Hex.)
C4-06 Motor 2 Torque
Comp Delay Time
(021A)
Sets the time constant used during Speed Search or during regenerative operation when ov occurs.
Adjust this parameter in the following circumstances.
• Gradually reduce the setting in 10 ms increments and check the performance to improve motor torque speed
response when ov occurs.
Note:
• Ensure that C4-06 ≥ C4-02 [Torque Compensation Delay Time].
• Increase the setting value of n2-03 [Automatic Freq Regulator Time 2] proportional to C4-06.
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C4-07: Motor 2 Torque Compensation Gain
No.
Name
(Hex.)
C4-07 Motor 2 Torque
Compensation Gain
(0341)
RUN
In V/f Control or CL-V/f Control, adjust the value in 0.05 unit increments for these conditions:
• When torque is not sufficient during low-speed operation of 10 Hz or less, increase the setting value
• When there is vibration in the motor or when the motor hunts when operating the drive with a light load,
decrease the setting value
• When you use a long motor cable, increase the setting value.
Note:
• Adjust C4-07 to make sure that the output current is not more than the drive rated current when operating the drive with a light load.
• In usual conditions, do not change this parameter in OLV Control. It can have a negative effect on torque precision. Setting this value
too high can cause overcompensation and motor oscillation.
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C4-19: Torque Ripple Suppress Min Freq
No.
Name
(Hex.)
C4-19 Torque Ripple
Suppress Min Freq
(0B8D)
Expert
Note:
Set C4-20 [Voltage Compensation Adjust 1] ≠ 0 to enable this parameter.
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C4-20: Voltage Compensation Adjust 1
No.
Name
(Hex.)
C4-20 Voltage
Compensation Adjust
(0BCB)
1
Expert
Note:
When there is audible noise during low-speed operation, set this parameter to 0.
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
V/f CL-V/f OLV CLV AOLV
Sets the value if ov [Overvoltage] occurs with sudden changes in the load,
at the end of acceleration, or at the start of deceleration.
V/f CL-V/f OLV CLV AOLV
Sets the gain for motor 2 torque compensation function when using the
Motor Switch function.
V/f CL-V/f OLV CLV AOLV
Sets a frequency to limit current and torque ripple. Increase this parameter
in 1.0 Hz increments when current ripples and torque ripples occur during
low-speed operation. Set this parameter to 0.0 to disable the function if
increasing the value does not fix the problem. Usually it is not necessary to
change this setting.
V/f CL-V/f OLV CLV AOLV
Sets voltage precision compensation. Usually it is not necessary to change
this setting.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
11.4 C: Tuning
Default
(Range)
150 ms
(0 - 10000 ms)
Default
(Range)
1.00
(0.00 - 2.50)
Default
(Range)
0.1 Hz
(0.0 - 10.0 Hz)
Default
(Range)
120
(0 - 200)
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