Vicruns VD120 Series, Manual

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VD120 Series Inverter User Manual Parameter Description
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83
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Vb
V1
f1
fb
Output voltage
Output frequency
V1: manual torque boost voltage Vb: max output voltage
f1: manual torque boost cutoff frequency fb: rated running frequency
Fig 6-6 Manual torque boost diagram
F4-04 MS V/F Frequency Point 1 0.00Hz~F4-06 0.00Hz
◎
F4-05 MS V/F Voltage Point 1 0.0%~100.0% 0.0%
◎
F4-06 MS VF Frequency Point 2 F4-04~F4-08 0.00Hz
◎
F4-07 MS V/F Voltage Point 2 0.0%~100.0% 0.0%
◎
F4-08 MS V/F Frequency Point 3
F4-06~Rated motor frequency
(F2-04)
0.00Hz
◎
F4-09 MS V/F Voltage Point 3 0.0%~100.0% 0.0%
◎
F4-04~F4-09 six parameters defined multistage V/F curve.
The curve of multipoint V/F should set according to the motor load characteristic, what need note is,
the relationship between the three point voltage and frequency points must be satisfied: V1<V2<V3,
F1<F2<F3. Figure 6-7 is multipoint V/F curve set diagram.
Voltage%
Vb
V3
V2
V1
F1 F2
F3
Fb Frequency%
V1-V3: MS speed V/F voltage percentage of 1-3 section
F1-F3: MS speed V/F voltage percentage of 1-3 section
Vb: rated motor voltage Fb: rated motor running frequency
Fig 6-7 Multipoint V/F curve set diagram
Voltage set too high may lead to motor overheating or even burning when low frequency, frequency
inverter may be loss of speed or overcurrent protection.