Increasing The Starting Torque (Pr. 0) - Mitsubishi 700 Series Instruction Manual

Before operation
3.3.4

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 When the motor will not rotate, increase the Pr. 0 value by 1% by
example
looking at the motor movement. (The guideline is for about 10%
change at the greatest.)
Operation
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.
Turn until
5.
Press to read the currently set value.
" " (6.0%(initial value)) appears for the 0.75K
or less.
6.
Turn to change the set value to "
(7.0%).
7.
Press to set.
Turn
Press
Press
NOTE
The amount of current flows in the motor may become large according to the conditions such as the motor
characteristics, load, acceleration/deceleration time, wiring length, etc. After overcurrent trip, E.OC1 (overcurrent trip
during acceleration)), overload trip (E.THM (motor overload trip), or E.THT (inverter overload trip) may occur.
(When a fault occurs, release the start command, and decrease the Pr. 0 setting by 1% to reset.) (Refer to page 96.)
POINT
If the inverter still does not operate properly after the above measures, set Pr. 80 (General-purpose magnetic flux
vector control). The Pr. 0 setting is invalid under General-purpose magnetic flux vector control.
Chapter 4 of the Instruction Manual (Applied)).
44
Initial Value Setting Range
0.75K or less 6%
1.5K to 3.7K 4%
0 to 30%
5.5K, 7.5K 3%
11K, 15K 2%
(Pr. 0) appears.
"
to read another parameter.
to show the setting again.
twice to show the next parameter.
V/F V/F V/F
Motor torque in the low-frequency range can be adjusted
to the load to increase the starting motor torque.
Pr. 0
Setting range
Pr. 46
Display
PU indication is lit.
PRM indication is lit.
(The parameter number read previously appears.)
(The initial value differs according to the capacity.)
Flicker ··· Parameter setting complete!!
Description
100%
Base
0
Output frequency
frequency
(Hz)
Refer to
(