Increase The Starting Torque (Pr. 0) - Mitsubishi Electric FR-A700 Series Instruction Manual

3.3.4

Increase 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 to choose the PU operation mode.
3.
Press to choose the parameter
setting mode.
4.
5.
Press to read the currently set value.
" "(initial value is 6% for the 0.75K)
appears.
6.
Turn to change it to the set value
" ".
7.
Press to set.
REMARKS
· A too large setting may cause the motor to overheat, resulting in an overcurrent shut-off (OL (overcurrent alarm) then E.OC1
(overcurrent shutoff during acceleration)), overload shut-off (E.THM (motor overload shutoff), and E.THT (inverter overload shutoff)).
(When a protective function occurs, release the start command, and decrease the Pr. 0 setting 1% by 1% to reset. (Refer to page 43)
POINT
If the inverter still does not operate properly after the above measures, adjust Pr. 80, Pr. 81 (Advanced magnetic flux
vector control), Pr.800 (Real sensorless vector control). The Pr.0 setting is invalid under advanced magnetic flux
vector control, real sensorless vector control and vector control. (Refer to
Initial Value
0.4K, 0.75K
1.5K to 3.7K
5.5K, 7.5K
11K to 55K
75K or more
Operation
Pr. 0) appears.
· By turning , you can read another parameter.
· Press to show the setting again.
· Press twice to show the next parameter.
V/F V/F V/F
Setting
Range
6%
4%
3% 0 to 30%
2%
1%
Output
voltage
Pr.0
Setting
Pr.46
range
Pr.112
Display
PU indication is lit.
The parameter
number read
previously appears.
Flicker ··· Parameter setting complete!!
Instruction Manual (applied).)
Before operation
Description
Motor torque in the low-
frequency range can be
adjusted to the load to increase
the starting motor torque.
100%
0 Output Base
frequency
frequency
(Hz)
The initial value
differs according
to the capacity.
3
51