K&R GT600-4T132G User Manual page 149

2. User-defined Multi-point V/F curve
Figure 6-37 User-defined Multi-point V/F curve
Output voltage
Rated voltage
F3-08: V3
F3-06: V2
F3-04: V1
F3-03 to F3-08 define multi-point V/F curve.
You must set multi-point V/F curve based on motor's load characteristic. The three
voltage points and frequency points must satisfy: V1 < V2 < V3, f1 < f2 < f3. When
you set F1 (F3-03), F2 (F3-05) and F3 (F3-07), set F3-07 first, then F3-05 and finally
F3-03.
3. Variable-torque Square V/F curve
Figure 6-38 Variable-torque Square V/F curve
Output voltage
F1-02
(Rated voltage)
F3-01
(Torque boost)
Output voltage and output frequency change according to square curve when below
rated frequency. It is applicable to applications such as centrifugal fans where the load
is inversely proportional to the speed.
f2
f1 f3
F3-03 F3-05 F3-07
6. Description of Parameters
Rated frequency
Output frequency
F1-04
(Rated frequency)
Output frequency
6
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