Increasing The Starting Torque (Pr. 0) - Mitsubishi Electric F700 Instruction Manual

Increasing the starting torque (Pr. 0)

4.2 Increasing the starting torque (Pr. 0)
Set this parameter when "the motor with a load will not rotate", "an alarm [OL] is output, resulting in an inverter
trip due to [OC1], etc.
Parameter
Name
Number
0 Torque boost
Changing example When the motor with a load will not rotate,
increase the Pr. 0 value 1% by 1% unit by
looking at the motor movement. (The guideline
is for about 10% change at the greatest.)
1.
Screen at powering on
The monitor display appears.
2.
Press
3.
Press
setting mode.
4.
5.
Press
" "(initial value is 6% for the 0.75K)
appears.
6.
Turn
" ".
7.
Press
REMARKS
· A too large setting may cause the motor to overheat, resulting in an overcurrent trip (OL (overcurrent alarm) then E.OC1
(Overcurrent trip during acceleration)), thermal trip (E.THM (Motor overload trip), and E.THT (Inverter overload trip)).
When a fault (E.OC1) occurs, release the start command, and decrease the Pr. 0 value 1% by 1% to reset. (Refer to page 108.)
POINT
If the inverter still does not operate properly after the above measures, adjust Pr. 80 Motor capacity(Simple magnetic
flux vector control) [extended mode]. (Refer to the chapter 4 of
66
1.5K to 3.7K
5.5K, 7.5K
11K to 37K
45K, 55K
75K or more
Operation
to choose the PU operation mode.
to choose the parameter
Pr. 0) appears.
to read the present set value.
to change it to the set value
to set.
· By turning , you can read another parameter.
· Press to show the setting again.
· Press twice to show the next parameter.
Initial Value
6%
0.75K
4%
3%
2%
1.5%
1%
Pr.0
Pr.46
PU indication is lit.
Flicker ··· Parameter setting complete!!
the Instruction Manual (applied).)
Setting
Description
Range
Motor torque in the low-
frequency range can be
0 to 30%
adjusted to the load to increase
the starting motor torque.
100%
Output
voltage
Setting
range
0 Output
frequency
(Hz)
Display
The parameter
number read
previously appears.
The initial value
differs according
to the capacity.
Base
frequency