Dc Injection Braking Function - Omron SYSDRIVE 3G3JV Series User Manual

Advanced Operation

6-2 DC Injection Braking Function

The DC injection braking function applies DC on the induction motor for
braking control.
Startup DC Injection Braking:
This braking is used for stopping and starting the motor rotating by inertia
with no regenerative processing.
DC Injection Braking to Stop:
Adjust the stop DC injection braking time if the motor rotating does not
decelerate to a stop in normal operation due to inertia from a heavy load.
By increasing the DC injection braking time or DC injection braking current,
the time required for stopping the motor is reduced.
n52 DC Injection Braking Current
Setting 0 to 100 (%)
range
DC Injection Braking-to-stop Time
n53
Setting 0.0 to 25.5 (s)
range
n54 Startup DC Injection Braking Time
Setting 0.0 to 25.5 (s)
range
Set the DC injection braking current as percentage based on the rated current of the
Inverter as 100%.
After the startup DC injection braking time is set, the Inverter starts up at minimum fre-
quency on completion of the startup DC injection braking control of the Inverter.
After the speed is reduced, the Inverter is switched to DC injection braking at minimum
output frequency.
DC Injection Braking Control
Output
frequency
Minimum
output
frequency
(n14)
Unit of 1%
setting
Unit of 0.1 s
setting
Unit of 0.1 s
setting
n54
Startup DC injection
braking time
Chapter 6
Changes during No
operation
Default setting 50
Changes during No
operation
Default setting 0.5
Changes during No
operation
Default setting 0.0
Time
n53
DC injection
braking-to-stop time
6-5