Adjust The Output Torque (Current) Of The Motor; Manual Torque Boost (Pr. 0, Pr. 46) - Mitsubishi Electric FR-E700 Series Instruction Manual
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Parameter
6.3
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
6.3.1
Manual torque boost (Pr. 0, Pr. 46)
You can compensate for a voltage drop in the low-frequency region to improve motor torque reduc-
tion 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-E720S-008SC to 050SC,
FR-E740-016SC and 026SC
FR-E720S-080SC and 110SC,
0
Torque boost
FR-E740-040SC to 095SC
FR-E740-120SC and 170SC
FR-E740-230SC and 300SC
Second torque
46
boost
The above parameter can be set when Pr. 160 "User group read selection" = 0.
FR-E700SC EC
Parameter that must be set
Manual torque boost
Advanced magnetic flux vector control,
General-purpose magnetic flux vector control
Slip compensation (V/F control and general-
purpose magnetic flux vector control only)
Stall prevention operation
Setting
Initial Value
Range
6%
4%
0–30%
3%
2%
0–30%
9999
9999
Adjust the output torque (current) of the motor
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
Refer to
Section
Pr. 0, Pr. 46,
6.3.1
Pr. 71, Pr. 80,
6.3.2
Pr. 81, Pr. 90,
6.3.3
Pr. 450, Pr. 800
Pr. 245–Pr. 247
6.3.4
Pr. 22, Pr. 23,
6.3.5
Pr. 66, Pr. 156,
Pr. 157
Parameters referred to
3
Base frequency
19
Base frequency voltage
71
Applied motor
178–184
Input terminal function
selection
Refer to
Section
6.5.1
6.5.1
6.8.2
6.10.1
6 - 33
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