CHINT NVF2G-S Series User Manual

● Decreasing torque V/F curve: Below the rated frequency, the relationship between the output voltage
and the output frequency changes according to the curves of 2 power, 1.7 power and 1.2 power. This
V/F curve is suitable for light load and the load does not change frequently. Fan, water pump load use.
Output voltage
Vb
Linear
Square
fb
Output frequency
1.2power reduce torque V/F curve
1.7power reduce torque V/F curve
2.0power reduce torque V/F curve
Figure 8 -5-3 V/F Curve of Decreasing Torque
8.6 Vector control
Vector control is speed control: The speed control method is based on the stable speed as the core of the
whole control to ensure that the running speed is consistent with the set speed, and the maximum load capacity
is limited by the torque limiter.
8.6.1 Vector speed control parameter setting
If vector control is used, motor parameter self-learning must be performed first, see 8.4 Motor parameter
self-learning.
8.7 Overflow stall protection
During the operation of the inverter, if the current exceeds the overcurrent stall action current (factory
value 150% means 1.5 times the rated current of the motor), the overcurrent stall will take effect, and the output
frequency will begin to decrease until the current returns below the overcurrent stall point. After that, the
frequency starts to accelerate upwards to the target frequency, and the actual acceleration time is automatically
lengthened. The larger the overflow stall gain is, the stronger the overflow stall effect is, that is, the faster the
output frequency drops.
0: SVC control
1: V/F control
function
code
name
default
value
Predetermined area
Parameter Description
F0.00
Motor control method
1
0~1
F3.01
Speed Regulator Proportional Gain 1
30
1~100
-
F3.02
Speed regulator integral gain 1
0.5s
(0.01~10. 00)s
-
F3.03
Switching frequency 1
5.00Hz
0Hz~F3.06
-
F3.04
Speed Regulator Proportional Gain 2
20
1~100
-
F3.05
Speed regulator integral gain 2
1.00s
(0.01~10. 00)s
-
F3.06
Switching frequency 2
10.00Hz
F3.03~F0.07
-
F3.07
SVC slip compensation coefficient
100%
(50~ 200)%
052
NVF2G-S Series Inverter User's Guide

CHINT NVF2G-S Series Specifications

General

Brand	CHINT
Model	NVF2G-S Series
Category	Inverter
Language	English