Torque Bias - Mitsubishi Electric FR-A820-00046 Instruction Manual

Parameters Speed control under Real sensorless vector control, vector control, PM sensorless vector control
5.3.8

Torque bias

The torque bias function can be used to make the starting torque start-up faster. At this time, the mo-
tor starting torque can be adjusted with a contact signal or analog signal.
Pr.
840
G230
841
G231
842
G232
843
G233
844
G234
845
G235
846
G236
847
G237
848
G238
Block diagram
Torque bias selection 1
Torque bias selection 2
Fig. 5-31:
FR-A800
Sensorless Vector Sensorless Sensorless
Vector Vector
Name
Torque bias selection
Torque bias 1
Torque bias 2
Torque bias 3
Torque bias filter
Torque bias operation time
Torque bias balance
compensation
Fall-time torque bias terminal
1 bias
Fall-time torque bias terminal
1 gain
Speed command Speed command
Internal parameters
X42
[Pr. 841]
[Pr. 842]
X43
[Pr. 843]
SD
Block diagram
Initial Setting
Description
value range
Set the torque bias amount using contact signals
0
(X42, X43) in Pr. 841 to Pr. 843.
Set the torque bias amount using terminal 1 in any of
1 C16 to C19. (When the squirrel cage rises during
forward motor rotation.)
Set the torque bias amount using terminal 1 in any of
2 C16 to C19. (When the squirrel cage rises during
reverse motor rotation.)
9999
The torque bias amount using terminal 1 can be set
3 automatically in C16 to C19 and Pr. 846 according to
the load.
Torque bias command via PROFIBUS-DP
24
communication (FR-A8NP) (-400% to 400%)
Torque bias command via PROFIBUS-DP
25
communication (FR-A8NP) (-327.68% to 327.67%)
9999 No torque bias, rated torque 100%
600 to
Negative torque bias amount (-400% to -1%)
999%
1000 to
9999 Positive torque bias amount (0 to 400%)
1400%
9999 No torque bias setting
0 to 5 s The time until the torque starts up.
9999
9999 The same operation as 0 s.
The time for retaining the torque of the torque bias
0 to 5 s
amount.
9999
9999 The same operation as 0 s.
0 to 10 V Set the voltage for the balanced load.
9999
9999 The same operation as 0 V. (Fixed to 0 V/0%.)
0 to 400% The bias value setting in the torque command.
9999
9999 The same as during rising (C16, C17 (Pr. 919)).
0 to 400% The gain value setting in the torque command.
9999
9999 The same as during rising (C18, C19 (Pr. 920)).
Speed
+
control
P gain
-
Speed
control
integral time
0
Integration cleared to 0
[Pr. 845]
[Pr. 840 = 0]
C16, C17
+
[Pr. 919]
-
C18, C19
[Pr. 846]
[Pr. 920]
+ +
Torque
M
3~
control
+ +
[Pr. 840 = 1, 2, 3]
Cage
[Pr. 826]
Torque setting filter 1
Cage
Terminal 1
Load
detector
PLG
CW
Cage
I002522E
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