Emotron AB 01-4429-01r2 Functional Description 91
Fig. 71 Jog command
11.3.6 Torques [350]
Menu with all parameters for torque settings.
Maximum Torque [351]
Sets the maximum torque. This Maximum Torque operates
as an upper torque limit. A Speed Reference is always neces-
sary to run the motor.
Communication information
IxR Compensation [352]
This function compensates for the drop in voltage over dif-
ferent resistances such as (very) long motor cables, chokes
and motor stator by increasing the output voltage at a con-
stant frequency. IxR Compensation is most important at low
frequencies and is used to obtain a higher starting torque.
The maximum voltage increase is 25% of the nominal out-
put voltage. See Fig. 72.
Selecting “Automatic” will use the optimal value according
to the internal model of motor. “User-Defined” can be
selected when the start conditions of the application do not
change and a high starting torque is always required. A fixed
IxR Compensation value can be set in the menu [353].
Communication information
Fig. 72 IxR Comp at Linear V/Hz curve
IxR Comp_user [353]
Only visible if User-Defined is selected in previous menu.
Default: 120% calculated from the motor data
Range: 0–400%
Modbus Instance no/DeviceNet no: 43141
Profibus slot/index 169/45
Fieldbus format Long, 1=1%
Modbus format EInt
NOTE: 100% Torque means: I
NOM
= I
MOT
. The maximum
depends on the motor current and VSD max current
settings, but the absolute maximum adjustment is
400%.
NOTE: The power loss in the motor will increase by the
square of the torque when operating above 100%. 400%
torque will result in 1600% power loss, which will
increase the motor temperature very quickly.
T
MOT
Nm()
P
MOT
w()x60
n
MOT
rpm()x2Π
-----------------------------------------=
NOTE: This menu is visible only in V/Hz mode.
Default: Off
Off 0 Function disabled
Automatic 1 Automatic compensation
User Defined 2 User defined value in percent.
Modbus Instance no/DeviceNet no: 43142
Profibus slot/index 169/46
Fieldbus format UInt
Modbus format UInt
Default: 0.0%
Range: 0-25% x U
NOM
(0.1% of resolution)
10 20 30 40 50
Hz
f
25
%
U
100
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