Emotron VS Series Quick Start Guide
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0
Rated frequency of motor
SL V/F
Rated voltage of motor
Output frequency
（
Hz)
1.2 power
1.4 power
1.6 power
1.8 power
2.0 power
Output voltage (V)
Fig 6-24
7: V/F complete separation (VSX Only)
In this mode, the output frequency and output voltage of the AC drive are independent. The output
frequency is determined by the frequency source, and the output voltage is determined by "Voltage
source for V/F separation" (d1.15).It is applicable to induction heating, inverse power supply and
torque motor control.
8: V/F half separation (VSX Only)
In this mode, V and F are proportional and the proportional relationship can be set in d1.15. The
relationship between V and F are also related to the rated motor voltage and rated motor frequency in
Group d0.Assume that the voltage source input is X (0 to 100%), the relationship between V and F is:
V/F = 2 * X * (Rated motor voltage)/ (Rated motor frequency)
9: 1.2 power inverse curve (VSX Only).
10: 1.4 power inverse curve (VSX Only).
11: 1.6 power inverse curve (VSX Only).
12: 1.8 power inverse curve (VSX Only).
13: 2.0 power inverse curve (VSX Only).
9
～
13 curve is for torque boost
，
which is rotated 180 degrees along diagonal line of 2~6 curve
d1.01
Torque boost
Range:0.0
～
30.0%
Default: 0.0%
d1.02
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 d1.00.
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:
d1.02 specifies the frequency under which torque boost is valid. Torque boost becomes invalid
when this frequency is exceeded, as shown in the following figure.
