Savch S3100A Series, User Manual

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03-07 Multi-point V/f frequency point 3
Factory setting
0.00Hz
Setting range 03-05
～
motor rated frequency(01-03)
03-08
Multi-point V/f voltage point 3
Factory setting
0.0%
Setting range 0.0%
～
100.0%
Parameters 03-03
～
03-08 can define multi-segment V/f curve.
The curve of the multi-point V/f should be set according to the load characteristics of the motor. Note that the
relationship between the three voltage points and the frequency point must meet: V1 <V2 <V3, F1 <F2 <F3.
Figure 5-4 is a schematic diagram of multi-point V/f curve setting.
If the voltage is set too high at low frequency, the motor may overheat or even burn, and the inverter may be
overcurrent stalled or overcurrent protected.
Voltage %
Vb
V1
F3 F1
Frequency %
V3
V2
F2
Fb
V1-V3: Voltage percentage of the 1st-3rd segment of multi-point V/f
F1-F3: Frequency percentage of the 1st-3rd segment of multi-point V/f
Vb: Rated voltage of motor
Fb: Rated running frequency of motor
Figure 5-4 Schematic diagram of multi-point V/f curve setting.
03-09 V/f slip compensation gain 
Factory setting
0.0%
Setting range 0.0%
～
200.0%
V/f slip compensation can compensate the motor rotation deviation generated by the asynchronous motor when
the load increases, so that the motor speed can be basically stabilized when the load changes.
03-10
V/f overexcitation gain 
Factory setting 64
Setting range 0
～
200
During the deceleration of the inverter, the overexcitation control can suppress the rise of the bus voltage and
avoid overvoltage faults.The greater the gain, the stronger the suppression effect. However, if the overexcitation
gain is too large, the output current Output current is likely to increase, and a moderate setting is required. For
applications where the inertia is small or the braking resistor is used, the recommended gain is set to zero.