Function Application
‑565‑
3.4 Control Performance
3.4.1 Setting the V/f Curve
Table 3–22 Setting parameters of linear, multi‑point, and square V/f curves
Para.
Function
De
fault
Value Range
Description
F3‑00
V/f curve
setting
0
0: Linear V/f
curve
1: Multi‑point V/f
curve
2: Square V/f
curve
3: 1.2‑power V/f
curve
4: 1.4‑power V/f
curve
6: 1.6‑power V/f
curve
8: 1.8‑power V/f
curve
10: V/f complete
separation
mode
11: V/f half
separation
mode
0: Linear V/f curve
Below the rated frequency, the
relationship between the output voltage
and output frequency of the AC drive
changes linearly. This curve is applicable
to common mechanical drive scenarios
such as large inertia fan acceleration,
punch presses, centrifuges, and water
pumps.
1: Multi‑point V/f curve
The frequency points range from 0.00 Hz
to the rated motor frequency. The voltage
points range from 0.0% to 100.0%,
corresponding to the voltage range from 0
V to the rated motor voltage. Generally,
the multi‑point V/f curve is set based on
load characteristics of the motor. Ensure
the following conditions are met: F3‑03 ≤
F3‑05 ≤ F3‑07.
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