Eaton SLX9000 - Figure 9-11: DC-Braking Time When Stop Mode = Coasting; Figure 9-12: DC-Braking Time When Stop Mode = Ramp

SLX9000 Adjustable Frequency Drives User Manual
9-18 For more information visit: www.eaton.com
MN04003020E
January 2009
Figure 9-11: DC-Braking Time When Stop Mode = Coasting
Figure 9-12: DC-Braking Time When Stop Mode = Ramp
Par. 2.1.12 = 1 (Stop function = Ramp):
After the Stop command, the speed of the motor is reduced according to the set
deceleration parameters, as fast as possible, to the speed defined with parameter
2.4.5, where the DC-braking starts.
The braking time is defined with parameter 2.4.4. If high inertia exists, it is
recommended to use an external braking resistor for faster deceleration. See Figure
9-12.
2.4.5 DC-braking frequency in ramp stop ID515
The output frequency at which the DC-braking is applied. See Figure 9-12.
t
f
out
Output Frequency
Motor Speed
DC-Braking ON
RUN
STOP
t = 1 x Par. ID508
t
f
out
f
n
f
n
Output Frequency
Motor Speed
DC-Braking ON
RUN
STOP
t = 0.1 x Par. ID508
0.1 x f
n
t
Output Frequency
Motor Speed
DC-Braking
RUN
STOP
Par. ID515
t = Par. ID508
f
out