Inovance MD800 Series Function Guide

Function Applications
-477-
Para.
No.
Name
Default
Value Range Description
F3-01
Torque boost
Model
dependent
0.0 to 30.0
0.0%: Automatic
torque boost
The torque boost function generally applies to the AC drive at low frequency.
The output torque of the AC drive in V/f control mode is proportional to the
frequency. Under the condition of low frequency, the torque is very low when
the motor is running at a low speed. In this case, you can set this parameter to
increase the output voltage of the AC drive, thereby increasing the current and
output torque.
Do not set this parameter to a large value, otherwise, overload protection may
be triggered.
F3-02
Cutoff
frequency of
torque boost
50.00 Hz
0.00 Hz to maximum
frequency
When the running frequency reaches the cutoff frequency of torque boost, the
torque boost function is disabled.
F3-03
Multi-point V/f
frequency 1
0.00 Hz 0.00 Hz to F3-05
-
F3-04
Multi-point V/f
voltage 1
0.0% 0.0% to 100.0%
F3-05
Multi-point V/f
frequency 2
0.00 Hz F3-03 to F3-07
F3-06
Multi-point V/f
voltage 2
0.0% 0.0% to 100.0%
F3-07
Multi-point V/f
frequency 3
0.00 Hz
F3-05 to F1-04 (Rated
motor frequency)
F3-08
Multi-point V/f
voltage 3
0.0% 0.0% to 100.0%
Straight-line V/f Curve
The following figure shows the general constant-torque straight-line V/f curve.
Figure 4-34 General constant-torque straight-line V/f curve
Below the rated frequency, the output voltage changes linearly with the frequency. This curve is
applicable to general mechanical drive applications such as large-inertia fan acceleration, punch
presses, centrifuges and water pumps.
Multi-point V/f Curve
The following figure shows a user-defined multi-point V/f curve.

Inovance MD800 Series Specifications

General

Brand	Inovance
Model	MD800 Series
Category	DC Drives
Language	English