WEG CFW700, Programming And Troubleshooting Manual

Page: 103 / 223

Vector Control
11
CFW700 | 11-25
11.8.6 Torque Current Limitation
The parameters placed in this group define the torque limitation values.
P0169 – Maximum “+” Torque Current
P0170 – Maximum “-” Torque Current
Adjustable
Range:
0.0 to 350.0 % Factory
Setting:
125.0 %
Properties: Vector
Access groups
via HMI:
Description:
These parameters limit the value of the motor current component that produces “+” torque (P0169) or “-” torque
(P0170). The setting is expressed as a percentage of rated motor current (P0401).
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 or P0019).
In the torque limitation condition the motor current can be calculated by:
+ (P0410)
2
P0169 or P0170 (*) x P0401
100
2
I
motor
=
The maximum torque developed by the motor is given by:
2
T
motor
(%)=
P0401 x P0169 (*)
or P0170 x K
100
x100
(P0401)
2
- P0410 x P0178
100
Where:
N
nom
= motor synchronous speed,
N = motor current speed
K =
1 for N ≤ P0190 x N
nom
P0400
N
nom
x P0190 for N > P0190 x N
nom
N P0400 P0400
(*)
In case that the torque current limitation be provided by an analog input, replace P0169 or P0170 by P0018 or
P0019 according to the programmed AIx. For more details refer to item 13.1.1 - Analog Inputs .