YASKAWA GA800 Programming Manual page 255

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C3-04: Slip Compensation at Regen
No.
Name
(Hex.)
C3-04 Slip Compensation at Regen
(0212)
If you apply a regenerative load when slip compensation function during regeneration is active, the quantity of
regeneration can increase immediately. In this condition, it is necessary to use a dynamic braking option (braking
resistor or braking resistor unit).
0 : Disabled
The drive does not provide slip compensation during regeneration.
The load and operation status (regenerative operation) can cause the motor speed to be higher or lower than the
frequency reference.
1 : Enabled Above 6Hz
Slip compensation function is enabled during regeneration. Slip compensation is disabled at output frequencies of 6
Hz or less.
2 : Enabled Above C3-15
The drive uses E2-02 [Motor Rated Slip] to automatically calculate the frequency range where it will disable slip
compensation function during regenerative operation.
Slip compensation is enabled at frequencies as low as 2 Hz.
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C3-05: Output Voltage Limit Selection
No.
Name
(Hex.)
C3-05 Output Voltage Limit
Selection
(0213)
The drive will decrease flux and increase current to compensate torque when voltage is saturated. Make sure that the
drive has sufficient output current capacity before you enable this parameter. When this parameter = 1 [Enabled], the
output current will increase by 10% at a maximum (at rated load) before it is enabled.
Enable this parameter to increase speed precision when you move heavy loads at high speeds in these conditions:
• Power supply voltage is low
• Motor rated voltage is high
Do not enable this parameter in these conditions:
• Operating a motor in the middle speed range or low speed range
• Power supply voltage is a minimum of 10% more than the motor rated voltage
When you enable this parameter, if the power supply voltage is much less than the motor rated voltage, torque control
will not be accurate.
0 : Disabled
1 : Enabled
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
Figure 2.51 Slip Compensation Limit
V/f CL-V/f OLV CLV AOLV
Sets the slip compensation function during regenerative operation.
V/f CL-V/f OLV CLV AOLV
Sets the automatic reduction of motor magnetic flux when the output voltage is saturated.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
2.4 C: Tuning
Default
(Range)
0
(0 - 2)
Default
(Range)
0
(0, 1)
2
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