6-29
6-5 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.
ByincreasingtheDCinjectionbrakingtimeorDCinjectionbrakingcurrent,
the time required for stopping the motor is reduced.
n089 DC Injection Braking
Current
Register 0159
Hex
Changes during
operation
No
Setting
range
0 to 100 (%) Unit of
setting
1% Default setting 50
n090 DC Injection Braking-to-stop
Time
Register 015A
Hex
Changes during
operation
No
Setting
range
0.0 to 25.5 (s) Unit of
setting
0.1 s Default setting 0.5
n091 Startup DC Injection Braking
Time
Register 015B
Hex
Changes during
operation
No
Setting
range
0.0 to 25.5 (s) Unit of
setting
0.1 s Default setting 0.0
·Set the DC injection braking current as percentage based on the rated current of the
Inverter as 100%.
·AfterthestartupDCinjection braking time is set,theInverterstartsupat minimumfre-
quency on completion of the startup DC injection braking control of the Inverter.
Advanced Operation Chapter 6
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