FR200 Series Vector control inverter
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9
：
1.2 power inverse curve
10
：
1.4 power inverse curve
11
：
1.6 power inverse curve
12
：
1.8 power inverse curve
13
：
2.0 power inverse curve
9
～
13 curve is for torque boost
，
which is rotated 180 degrees along diagonal line of 2~6 curve
F09.01
Torque boost
Range:0.0
～
30.0%
Default:
0.0%
F09.02
Cut-off frequency of torque
boost
Range:0.0
～
Fmax
Default:50.0Hz
Torque boost:
Under V/f pattern, output voltage at low frequency can be compensated by this parameter,
improving the torque output. 0.0% corresponds to automatic torque boost, and drive output voltage is
automatically compensated via detection of load current. Automatic torque boost is valid only for linear
V/f pattern. 100% of torque boost corresponds to rated voltage of motor. A non-zero value means the
output voltage rises on the basis of V/f curve and this takes effect at parameter values 0
～
6 of F09.00.
It is suggested this parameter value be gradually increased from zero until the starting requirement is
met. Boost value is not suggested to be set to a relatively big one, as it is likely to bring about a bigger
drive current and higher motor temperature.
Cut-off frequency of torque boost:
F09.02 specifies the frequency under which torque boost is valid. Torque boost becomes invalid
when this frequency is exceeded, as shown in the following figure.
0
Cut-off frequency of
torque boost
Torque boost
Output frequency
（
Hz)
Output voltage (V)
Rated voltage of motor
Rated frequency of motor
Fig. 6-18
F09.03
Multi-point V/F frequency 1(F1)
Range:0.0
～
F09.05
Default:0.0Hz
F09.04
Multi-point V/F voltage 1(V1)
Range:0.0
～
100.0%
Default:0.0%
F09.05
Multi-point V/F frequency 2(F2)
Range:F09.03
～
F09.07
Default:0.0Hz
F09.06
Multi-point V/F voltage 2(V2)
Range:0.0
～
100.0%
Default:0.0%
F09.07
Multi-point V/F frequency 3(F3)
Range:F09.05
～
F09.09
Default:0.0Hz
F09.08
Multi-point V/F voltage 3(V3)
Range:0.0
～
100.0%
Default:0.0%
F09.09
Multi-point V/F frequency 4(F4)
Range:F09.07
～
rated motor
frequency
Default:50.0Hz
F09.10
Multi-point V/F voltage 4(V4)
Range:0.0
～
100.0%
Default:100.0%
F09.03
～
F09.10 is used for broken line V/f mode. Voltage value 100% corresponds to rated
voltage of motor. Please rationally set the values of frequency and voltage at knees on the basis of
characteristics of motor and load. Improper setting may rise output current even burn the motor. Figure
6-18 setting of multi-point V/F curve.
