Mitsubishi Electric FR-A700 Instruction Manual page 359

Parameter
Fig. 6-63: Torque boost in dependence of the output current
● When operating the elevator with load more than the rated inverter current, the maximum
torque may become insufficient. For the elevator without counterweight, setting "2 or 3" (for
elevator load) in Pr. 14 "Load pattern selection" and an appropriate value in Pr. 19 "Base
frequency voltage" will generate larger maximum torque than when elevator mode is
selected.
NOTE
Stall prevention operation level automatically decreases according to the electronic thermal
relay function cumulative value, to prevent inverter overload shut-off (E.THT, E.THM).
When elevator mode (Pr. 292 = 5, 6) is set with automatic acceleration / deceleration set, the
stall prevention operation level is changed as shown below.
Stall prevention
operation level
Tab. 6-38: Influence of the overload capacity on the current limit
FR-A700 EC
When Pr. 0 = 6%
Torque boost 0%
Regenerative current
Pr. 292 = 5
Pr. 292 = 6
Torque boost [%]
6%
Pr. 0
3 %
100
Overload Capacity
120% 150%
Pr. 570 = 0 Pr. 570 = 1
110% 120%
115% 140%
Set V/f pattern
Pr. 292 = 5
Pr. 292 = 6
Driving current
120 140
[%]
115
200%
Pr. 570 = 2
150%
180%
I001549E
250%
Pr. 570 = 3
200%
230%
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