Mitsubishi Electric FR-A700 EC, Instruction Manual, Page: 327 / 826

Parameter Adjust the output torque of the motor (current)
FR-A700 EC 6 - 147
6.7 Adjust the output torque of the motor (current)
6.7.1 Manual torque boost (Pr. 0, Pr. 46, Pr. 112)
You can compensate for a voltage drop in the low-frequency region to improve motor torque
reduction in the lowspeed range.
Motor torque in the low-frequency range can be adjusted to the load to increase the starting
motor torque.
Three types of starting torque boost can be changed by switching terminals.
Purpose Parameter that should be Set
Refer to
Section
Set starting torque manually Manual torque boost Pr. 0, Pr. 46,
Pr. 112 6.7.1
Automatically control output current
according to load Advanced magnetic flux vector control Pr. 71, Pr. 80,
Pr. 81, Pr. 89,
Pr. 450, Pr. 451,
Pr. 453, Pr. 454,
Pr. 569, Pr. 800 6.7.2
Compensate for motor slip to secure
low-speed torque Slip compensation Pr. 245–Pr. 247 6.7.3
Limit output current to prevent
inverter trip Stall prevention operation Pr. 22, Pr. 23,
Pr. 66, Pr. 154,
Pr. 156, Pr. 157 6.7.4
Change the overload current rating
specifications Multiple rating setting Pr. 570 6.7.5
Pr.
No.
Name
Initial
Value
Setting
Range
Description Parameters referred to
Refer to
Section
0
Torque boost
00023/
00038
6%
0–30%
Set the output voltage at
0Hz as %.
3
19
71
178–189
Base frequency
Base frequency
voltage
Applied motor
Input terminal
function selection 6.9.1
6.9.1
6.12.2
6.14.1
00052
to
00126
4%
00170/
00250
3%
00310
to
01800
2%
01800
or
größer
1%
46
Second torque boost 9999
0–30%
Set the torque boost value when
the RT signal is on.
9999 Without second torque boost
112
Third torque boost 9999
0–30%
Set the torque boost value when
the X9 signal is on.
9999 Without third torque boost
V/F V/F V/F