SAJ 8000m Series User Manual

8000m Series
- 76 -
5.5 F4 Group: V/F Control Parameters
This group of codes are only effective for V/F control(F0.00=1), but are invalid for
vector control.
V/F control is fit for fans,pumps and other general loads, or the situation of one
VFD drives several electric motors, or the situation that the frequency of the VFD
has too much difference with that of the electric motor.
F4.00
V/F curve selection Factory Setting 0
Setting Options
0 Linear curve
1 User-defined curve
2 1.3 square torque-step-down curve
3 1.7 square torque-step-down curve
4 2 square torque-step-down curve
0:Linear curve, suitable for situations of ordinary constant torque load.
1:User-defined curve,suitable for special loads such as water extractor,
hydro-extractor etc.Now by setting the parameters of F F4.03～ F4.08, you can get
any curve about V/F relations.
2:1.3 square torque-step-down.
3:1.7 square torque-step-down.
4: 2 square torque-step-down curve.
F4.01
Torque boost Factory Setting 3.0%
Setting Options
0.0 %(auto) 0.1% ～30.0%
F4.02
Torque boost cut-off frequency Factory Setting 20.0%
Setting Options
0.0～50.0% (relative to motor rated
frequency)
In order to make up for the feature of low-frequency torque of V/F control, do a lift

SAJ 8000m Series Specifications

General

Brand	SAJ
Model	8000m Series
Category	Controller
Language	English