Adjust The Output Torque (Current) Of The Motor - Mitsubishi Electric FR-D720S SC EC Instruction Manual

Adjust the output torque (current) of the motor

6.2 Adjust the output torque (current) of the motor
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
6.2.1 Manual torque boost (Pr. 0, Pr. 46)
You can compensate for a voltage drop in the low-frequency region to improve motor torque re-
duction in the low-speed range. Motor torque in the low-frequency range can be adjusted to the
load to increase the starting motor torque.
Switch-over between parameters 0 and 46 is possible via the RT input signal.
Pr.
Name
No.
FR-D720S-008SC to
FR-D740-022SC or less
FR-D720S-070SC and
0
Torque boost
FR-D740-036SC to
FR-D740-120SC and
Second torque
46
boost
The above parameter can be set when Pr. 160 = 0.
6 - 26
Parameter that must be set
Manual torque boost
General-purpose magnetic flux
vector control
Slip compensation
Stall prevention operation
Setting
Initial Value
Range
042SC, 6%
100SC, 0–30%
4%
080SC
3%
160SC
0–30%
9999
9999
V/F V/F V/F
Description
Set the output voltage at
0Hz as %.
Set the torque boost value
when the RT signal is on.
Without second torque
boost
Parameter
Refer to
Section
Pr. 0, Pr. 46, 6.2.1
Pr. 71, Pr. 80 6.2.2
Pr. 245–Pr. 247 6.2.3
6.2.4
Pr. 22, Pr. 23,
Pr. 66, Pr. 156,
Pr. 157
Parameters referred to
3 Base frequency
19 Base frequency
voltage
71 Applied motor
178–182 Input terminal
function selection
Refer to
Section
6.4.1
6.4.1
6.7.2
6.9.1