Sunfar C300 Series - Primary Application: Torque Boost and Frequency

46 SUNFAR C300
C300 series of non-sensor current vector-control inverter manual
0：Manual
Torque boost voltage is completely set by F1.1. There are two features: voltage will
steady boost. And motor will easily magnetic saturation when light-load.
1：Automatic
Torque boost voltage is changed with the stator current of motor. The boost voltage
is higher with the stator current higher.
Auto torque boost can prevent the magnetic saturation, as the boost voltage is too
high with light load, which can avoid the over-heat phenomenon of motor in low
frequency running.
Basic running frequency is corresponding to minimum frequency when output
voltage of inverter is highest. Usually, it is rated frequency of motor.
Maximal output voltage is corresponding to output voltage when inverter outputs
the base running frequency. Usually, it is rated voltage of motor.
Those parameters are used for setting user-defined curve which you need. Shown
Voltage
Boost voltage
f
[F1.3]
Voltage
[F1.4]
（
1
）
Decreasing torque curve
[F1.4]
（
2
）
Constant torque curve
f
Boost voltage
[F1.3]
[F1.1]
[F1.1]
Fig.6-5 Torque boost
F1.2 Torque boost patterns Setting range：0 ，1
F1.3 Base running frequency Setting range： 5.00 ~ the upper frequency
F1.4 Maximal output voltage Setting range： 200 ~ 500V/100~250V
F1.5 V/F freq. 3 Setting range： [F1.7] ~ [F1.3]
F1.6 V/F voltage 3 Setting range：[F1.8] ~ 100%
F1.7 V/F freq. 2 Setting range： [F1.9] ~ [F1.5]
F1.8 V/F voltage 2 Setting range：[F1.10] ~ [F1.6]
F1.9 V/F freq. 1 Setting range：0.0 ~ [F1.7]
F1.10 V/F voltage 1 Setting range：[F1.1] ~ [F1.8]
Boost voltage = ×[F1.4]×
[F1.1]
200
Inverter’s output Current
Inverter’s rated current