WEG CFW300 V1.3X, Руководство по программированию

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Functions Common to All the Control Modes
11-6 | CFW300
11
11.2.4 Current Limitation Type "Decelerate Ramp" P150 = 0 or 1
„
It prevents the motor from collapsing during torque overload in the acceleration or constant frequency.
„
Actuation: if the motor current exceeds the value set in P135, a null value is forced for the frequency ramp input
forcing the motor deceleration. When the motor current reaches a value below P135 the motor accelerates
again. Look at
Figure 11.5 on page 11-6 .
P135 - Maximum Output Current
Adjustable
Range:
0.0 to 40.0 A
Factory
Setting:
1.5 x I
nom
Properties:
Description:
Current level to activate the current limitation for the Ramp Hold and Decelerate Ramp modes, as per Figure
11.5 on page 11-6 (a) and (b), respectively. In order to disable the current limitation, you must set parameter
P135 > 1.9 x I
nom
.
Time
Time
Time
Time
Time
During
Acceleration
Ramp
acceleration
(P100)
Ramp
deceleration
(P101)
It decelerates
by emergency
ramp
Deceleration
(b) "Ramp Deceleration"
(a) "Ramp Hold"
Output
frequency
Output
frequency
Motor current
Motor current
Motor current
P135 P135
P135
Output
frequency
Figure 11.5: (a) and (b) Actuation modes of current limitation via P135