C4: Torque Compensation - YASKAWA HV600 Manual

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C3-22: Motor 2 Slip Comp Delay Time
No.
Name
(Hex.)
C3-22 Motor 2 Slip Comp Delay
Time
(0241)
RUN
Use these settings to adjust this parameter as necessary:
• When the speed is not stable, increase the setting.
• When the slip compensation response is too slow, decrease the setting.
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C3-29: Slip Compensation Gain @ Low Spd
No.
Name
(Hex.)
C3-29 Slip Compensation Gain @
Low Spd
(1B5D)
Expert
Use these settings to adjust this parameter as necessary:
• If the motor speed is slower than the frequency reference, increase the setting of this parameter in 0.1-unit
increments.
• If the motor speed is higher than the frequency reference, decrease the setting of this parameter in 0.1-unit
increments.
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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.
Name
(Hex.)
C4-01 Torque Compensation Gain
(0215)
RUN
Adjust the setting in these control methods and conditions:
A1-02 [Control Method Selection]
0 [V/f Control]
8 [EZ Vector Control]
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 = 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.
YASKAWA TOEPYAIHV6002A HV600 Drive Programming
V/f OLV/PM EZOLV OLV/PM
Sets the slip compensation delay time for motor 2 when speed is unstable or when the slip
compensation response is too slow. Usually it is not necessary to change this setting.
V/f OLV/PM EZOLV OLV/PM
Sets the slip compensation gain at low speed. Usually it is not necessary to change this setting.
V/f OLV/PM OLV/PM EZOLV
Sets the gain for the torque compensation function. Use this parameter value for motor 1 when you
operate multiple motors.
Status
Torque is not sufficient during low-speed operation of 10 Hz or less.
There is vibration in the motor when you operate the drive with a light
load.
The cable between the drive and motor is too long.
Description
Description
Description
Increase the setting in 0.05-unit increments.
Decrease the setting in 0.05-unit decrements.
Increase the setting in 0.05-unit increments.
2.4 C: Tuning
Default
(Range)
2000
(0 - 10000 ms)
Default
(Range)
0.0
(0.0 - 2.5)
Default
(Range)
Determined by A1-02
(0.00 - 2.50)
Adjustment
227
2