CHINT NVF5 Series User Manual

NVF5 Series User Manual Chapter 6 Parameter Function Description
● Speed Regulator、Torque Regulator Mode Selection
Speed / Torque Mode is switched by parameter F3.00 ，also it can be switched by
setting DI1 ～ DI and HDI terminals（DI function 38）.
● Torque Control Reference
Torque Control Reference is set by parameter F3.19.
When the torque reference is given byAI1、AI2、HDI，the final torque reference is：
AI output percentage of analog curve AI（pulse of HDI curve） × motor rated torque.
AI analog curve、pulse of HDI curve：refer to 6.2.3 Analog Main Frequency Setting
(AI1、AI2 setting) 、 6.2.4 Pulse Main Frequency Setting；
When the torque reference is positive，the inverter run forward，when the torque
reference is negtative，the inverter run reverse.
● Speed→Torque switch point
In order to avoid the system sudden skip in the start-up process, the inverter firstly
complete the start process in the speed mode, and switches to the torque control mode
when reaching the switching point；
This method can effectively solve the problems of insufficient starting torque and
sudden skip of starting torque in torque mode.
● Torque control Accel./Decel. time
Torque control Accel. Time F3.24 means acceleration time of torque reference from 0
to rated torque of motor，torque control Decel. Time F3.25 means deceleration time of
torque reference from rated torque of motor to 0.
● Forward/Reverse speed limit value in torque control mode
Used to set up the positive or reverse maximum operating frequency of the inverter
under the torque control mode.
In torque control mode,If the load torque is less than the output torque of the motor,
the speed of the motor will rise continuously. In order to prevent the mechanical system
from flying accidents, it is necessary to limit the maximum speed of the motor.
6.6.3 Current Loop in Vector Control Mode
Accel. Time
F3.25
Torque Control
Decel. Tim
0.10s
（0.00 ～ 650.00）s
F3.26
Forward Speed
Limit in Torque
Mode
100.0%
（0.0~100.0）%
F3.27
Reverse Speed
Limit in Torque
Mode
100.0%
（0.0~100.0）%
Code Name Default
Setting
Range
Description
F3.11
Flux Regulation Kp
2000
0 ～ 60000
-
F3.12
Flux Regulation Ki
1300
0 ～ 60000
-
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CHINT NVF5 Series Specifications

General

Brand	CHINT
Model	NVF5 Series
Category	Inverter
Language	English