YASKAWA GA800 Series, Техническое описание

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12.4 C: Tuning
722 YASKAWA SIEPC71061737B GA800 Drive Technical Reference
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C4: Torque Compensation
Torque compensation is a function that increases voltage to increase output torque as compensation for insufficient
torque production at start-up or low-speed operation.
Voltage drops due to motor winding resistance cause torque generating voltage to decrease, which causes insufficient
torque. If the main circuit cable connecting the drive and motor is long, this can also cause insufficient torque due to
voltage drops.
Note:
Set the motor parameters and V/f pattern properly before setting C4 parameters .
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C4-01: Torque Compensation Gain
No.
(Hex.)
Name Description
Default
(Range)
C4-01
(0215)
RUN
Torque Compensation Gain
Sets the gain for the torque compensation function. Use this parameter value for motor 1 when
operating multiple motors.
Determined by A1-02
(0.00 - 2.50)
Adjust the setting in these control methods and conditions:
A1-02 [Control Method Selection] Status Adjustment
0 [V/f Control]
1 [V/f Control with Encoder]
8 [EZ Vector Control]
Torque is not sufficient during low-speed operation of 10 Hz or less.
Increase the setting in 0.05-unit increments.
There is vibration in the motor when operating the drive with a light load.
Decrease the setting in 0.05-unit decrements.
The cable between the drive and motor is too long. Increase the setting in 0.05-unit increments.
Note:
•
Adjust C4-01 to make sure that the output current is not more than the drive rated current during low-speed operation.
• When A1-02 = 2 [Open Loop Vector] , usually it is not necessary to change this setting. If you change this parameter in that control method,
it can decrease the torque precision.
• When A1-02 = 5 [PM Open Loop Vector] , usually it is not necessary to change this setting. Setting this value too high can cause
overcompensation and motor oscillation.
•
When A1-02 = 8 [EZ Vector Control] , you cannot change the setting while the drive is running.
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C4-02: Torque Compensation Delay Time
No.
(Hex.)
Name Description
Default
(Range)
C4-02
(0216)
RUN
Torque Compensation Delay
Time
Sets the torque compensation delay time. Usually it is not necessary to change this setting.
Determined by A1-02
(0 - 60000 ms)
Note:
If A1-02 = 8 [Control Method Selection = EZOLV] , you cannot change the setting while the drive is running.
Set this parameter in these conditions:
•
If there is vibration in the motor, increase the setting.
•
If the motor speed or motor torque response is too slow, decrease the setting.
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C4-03: Torque Compensation @ FWD Start
No.
(Hex.)
Name Description
Default
(Range)
C4-03
(0217)
Torque Compensation @
FWD Start
Set the amount of torque reference for forward start as a percentage of the motor rated torque.
0.0%
(0.0 - 200.0%)
The torque compensation function is performed using the time constant set in C4-05 [Torque Compensation Time] .
This is available only when you start the motor with the forward command. Set this parameter to 0.0 to disable this
function.
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV