Mitsubishi Electric FR-D720S SC EC, Instruction Manual

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