YASKAWA CR700, Техническое руководство, Страница: 607 / 886

Parameter
Details
11
11.4 C: Tuning
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual 607
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.
■
C3-05: Output Voltage Limit Selection
No.
(Hex.)
Name Description
Default
(Range)
C3-05
(0213)
Output Voltage Limit
Selection
Sets the automatic reduction of motor magnetic flux when the output voltage is saturated.
0
(0, 1)
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
■
C3-16: Vout Modulation Limit Start Lvl
No.
(Hex.)
Name Description
Default
(Range)
C3-16
(0261)
Expert
Vout Modulation Limit
Start Lvl
Sets the modulation factor that starts the output voltage limit operation when C3-05 = 1 [Output
Voltage Limit Selection = Enabled] .
90.0%
(70.0 - 90.0%)
■
C3-17: Vout Modulation Limit Max Level
No.
(Hex.)
Name Description
Default
(Range)
C3-17
(0262)
Expert
Vout Modulation Limit Max
Level
Sets the modulation factor used with C3-18 [Output Voltage Limit Level] for the output voltage
limit operation when
C3-05 = 1 [Output Voltage Limit Selection = Enabled]
.
100.0%
(85.0 - 100.0%)
■
C3-18: Output Voltage Limit Level
No.
(Hex.)
Name Description
Default
(Range)
C3-18
(0263)
Expert
Output Voltage Limit Level
Sets the maximum drop width of the voltage reference when C3-05 = 1 [Output Voltage Limit
Selection = Enabled]
.
90.0%
(50.0 - 100.0%)
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV