User`s manual

72
DC Injection Braking Function Chapter 6-2
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.
• 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 frequency 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.
n52 DC Control Current Changes during
operation
No
Setting
range
0 to 100 (%) Unit of
setting
1% Default setting 50
n53 Interruption DC Control Time Changes during
operation
No
Setting
range
0.0 to 25.5 (s) Unit of
setting
0.1 s Default setting 0.5
n54 Startup DC Control Time Changes during
operation
No
Setting
range
0.0 to 25.5 (s) Unit of
setting
0.1s Default setting 0.0
DC Injection Braking Control
Output
frequency
Minimum
output
frequency
(n14)
n54
Startup DC control time
n53
Interruption DC control time
Time