Mitsubishi Electric FR-F820-00046, Instruction Manual

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Parameters (G) Control parameters
FR-F800 5 - 535
5.13.1 Manual torque boost
Voltage drop in the low-frequency range can be compensated, improving reduction of the motor
torque in the low-speed range.
●
Motor torque in the low-frequency range can be adjusted according to the load, increasing the
motor torque at the start up.
●
By using the RT signal, it is possible to switch between 2 types of torque boost.
Initial value for the FR-F820-00046(0.75K) or lower and FR-F840-00023(0.75K or lower.
Initial values for the FR-F820-00077(1.5K) to FR-F820-00167(3.7K), FR-F840-00038(1.5K) to
FR-F840-00083(3.7K).
Initial values for the FR-F820-00250(5.5K), FR-F820-00340(7.5K), FR-F840-00126(5.5K),
FR-F840-00170(7.5K).
Initial values for the FR-F820-00490(11K) to FR-F820-01540(37K), FR-F840-00250(11K) to FR-F840-
00770(37K).
!
Initial value for the FR-F820-01870(45K), FR-F820-02330(55K), FR-F840-00930(45K), FR-F840-
01160(55K).
Initial value for the FR-F820-03160(75K) or higher and FR-F840-01800(75K) or higher.
Starting torque adjustment
●
Assuming Pr. 19 "Base frequency voltage" is 100%, set the output voltage at 0 Hz to Pr. 0 (Pr. 46)
in percentage.
●
Perform the adjustment of the parameter little by little (approximately 0.5%), and confirm the
status of the motor each time. The motor may overheat when the value is set too high. Do not use
more than 10% as a guideline.
Pr. Name
Initial
value
Setting
range
Description
0
G000
Torque boost
6%
0 to 30% Set the output voltage at 0 Hz in %.
4%
3%
2%
1.5%
!
1%
46
G010
Second torque boost 9999
0 to 30% Set the torque boost value at when RT signal is ON.
9999 Without second torque boost
Fig. 5-259:
Relationship between output frequency and
output voltage
I002748E
V/F V/F V/F
0
100%
Output
voltage
Setting
range
Output
frequency
(Hz)
Base
frequency
Pr. 0
Pr. 46