Adjust The Output Torque Of The Motor (Current); Manual Torque Boost (Pr. 0, Pr. 46, Pr. 112) - Mitsubishi Electric FR-A700 Instruction Manual

Parameter
6.7

Adjust the output torque of the motor (current)

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