Danfoss VFD500 Series Manual page 76

VFD500 high performance vector control frequency inverter user manual
P12.07 Multi-point VF Frequency 3(F3) multi-point VF curveF2(P12.05)～600.00Hz
P12.08 Multi-point VFVoltage 3(V3)
P12.09 Torque boost
➢ Automatic torque boost
When P12.09=0=Automatic torque boost,inverter will automatically compensate output voltage to improve
torque in low frequency as per actual load ,it is useful for linear VF curve
➢ Manual torque boost
➢ When P12.09 not 0,it means manual torque output.Output frequency 0 torque increasing
value=p12.09*motor stator resistance *rated excitation current,,increasing value will be gradully decreased
as frequency increase ,if higher than 50% of motor rated frequency,increasing value will be zero
➢ Notice:manual torque boost is useful to linear and power curve
P12.11 Slip compensation gain
P12.12 Slip compensation filter time
P12.13 Oscillation suppression gains
Oscillation suppression
P12.14
effective frequency range
Current limit function
P12.15
selection
P12.16 Current limit level
Weak magnetic zone current
P12.17
limit factor
0.0%～100.0%
0%～200% 0% is automatic torque boost
0～200%
It is used to compensate the speed drop of
the asynchronous motor VF control with load,
and improve the speed control accuracy.
Please adjust according to the following
principles:
●
Increase the setting when the motor
speed is lower than the target value with
loading.
●
Reduce this setting when the motor
speed is higher than the target value
with loading,
0.01s～10.00s
It is used to adjust the speed and stability of
the VF control response to the load.
● Decrease this setting when the load
response is slow.
● Increase this setting when the speed is
unstable
0～2000
In the SVPWM control mode, current
fluctuation may occur to the motor on some
frequency, especially the motor with
big power. The motor can not run stably or
overcurrent may occur. These phenomena
can be canceled by adjusting thisparameter.
Oscillation suppression effective range :
100%～1200%
Set the range of the oscillation suppression
function, 100% corresponds to the rated
frequency of the motor
0：ineffective
1：only adjust output voltage(Current limiting
for general VF separation)
2：adjust output frequency
20%～180% drive rated current
optimize dynamic performance of Weak
magnetic zone,10%～100%
73
Chapter 5 function code table
☆
50.00Hz
☆
100.0%
☆
0%
☆
100%
☆
1.00s
☆
300
☆
110%
★
2
☆
150%
☆
0.60