WEG CFW-11 Programming Manual page 147

Description:
These parameters limit the motor current component that produces "+" (P0169) or "-" (P0170) torque. The adjustment
is expressed as a percentage of the motor nominal torque current.
The positive torque occurs when the motor drives the load in the clockwise direction, or the load drives the motor in
the counterclockwise direction. The negative torque occurs when the motor drives the load in the counterclockwise
direction, or the load drives the motor in the clockwise direction.
If P0169 or P0170 is adjusted too low, there might not be enough torque for the motor to activate the load. If the
value adjusted in the parameters is too high, overload or overcurrent fault may occur.
In case that any Analog Input (AIx) be programmed for the option 2 (Maximum Torque Current), P0169 and P0170
become inactive and the current limitation will be specified by the AIx. In this case the limitation value can be
monitored at the parameter correspondent to the programmed AIx (P0018 ... P0021).
NOTE!
The maximum value that those parameters may assume is internally limited at 1.8 x P0295 (HD).
In the torque limitation condition the motor current can be calculated by:
P0169 or P0170
(*)
=
I
motor
100
The maximum torque developed by the motor is given by:
P0401 x P0169
T (%)=
motor
(P0401) - P0410 x P0178
2
(*) In case that the current limitation be provided by an analog input, replace P0169 or P0170 by P0018, P0019, P0020
or P0021, according to the programmed AIx. For more details refer to the
For the applications of torque control some recommendations of adjustments of P0169 and P0170 are provided in
Section 11.5 TORQUE CONTROL on page
P0171 – Maximum "+" Torque Current at Maximum Speed
2
x P0401
+ (P0410)
2
or P0170
(*)
100
x100
2
100
11-7.
Vector Control
Item 13.1.1 Analog Inputs [38] on page 13-1.
11
11-29