WEG CFW-09 User Manual page 143

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
[Factory Setting]
Parameter
(7)
P169 0.2 x P295 to 1.8 x P295
Maximum Output
Current 0.1A (< 100) -1A (> 99.9)
For V/F Control
(P202 = 0, 1, 2 or 5)
P169 (7)
Maximum Forward
Torque Current
For Vector Control
(P202 = 3 or 4)
P170
Maximum Reverse
Torque Current
This para-
meters (P169 and
P170) are shown on
the display(s) only
when P202 = 3 or 4
(Vector Control)
144
Range
Unit Description / Notes
This parameter limits the motor output current by reducing the speed,
which avoids motor stalling under overload conditions.
[ 1.5 x P295 ]
As the motor load increases, the motor current also increases. When
this current exceeds the value set at parameter P169, the motor speed
is reduced (by using the deceleration ramp) until the current value falls
below the value set at P169. The motor speed is resumed when the
overload condition stops.
Accel. Ramp
(P100/P102)
0 to 180 This parameter limits the value of the component of the motor current
[ 125 ] that produces forward torque. The setting is expressed as a percentage
1 % value of the inverter rated current (P295 = 100 %).
The values of P169/P170 can be calculated from the maximum desired
value for the motor current (Imotor) by using the following equation:
This parameter limits the value of the component of the motor current
0 to 180
[ 125 ] that produces reverse torque. While operating in torque limitation, the
1 % motor current can be calculated by:
Motor current
P169
Speed
Decel. Ramp
(P101/P103)
During
Acceleration
Figure 6.21 - Curves showing the actuation of the current limitation
100 x Imotor
P169/P170 (%) =
P169 or P170
Imotor =
100
Decel. Accel.
Ramp
Ramp
During
During
Deceleration
Cont. Duty
2 100 x P410
-
P295 P295
2
2
x P295 + (P410)
Time
Time
2