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Optidrive E3 Set-up Guide
15
DC Injection Braking
DC Injection Braking Current – P-59
Setting
Default
Explanation
0.0 to 100% of P-08
(motor rated current)
20.0%
Sets the level of DC injection braking current applied
depending on the setting of P-32 in % of motor rated
current (P-08).
For a given inertia, the higher the DC injection braking current, the less time will be required to stop the motor.
The DC injection braking can be a useful feature to ensure that a motor is at standstill before the drive
acceleration ramp is applied or to make sure the motor is at standstill after the deceleration ramp has been
applied.
NOTES:
DC injection braking is only initiated on a Start/Run or Stop command.
When DC injection braking on start has been set, if the run command is removed during the DC injection
braking phase, the drive will disable.
When DC injection braking on stop has been set, if the run command is re-applied during the DC injection
braking phase, the DC injection phase must be complete before the drive will re-enabled.
The following diagrams give examples of what happens when DC injection braking is initiate on start and stop.
The actual stopping time is dependant on the level of DC injection braking current and the inertia of the load.
The higher the DC injection braking current the shorter the stopping time for a given inertia.
DC Injection Braking on Start
S
ta
rt
c
o
m
m
a
n
d
P-59
DC Injection
Braking current
P-31 Index 1
DC Injection
Braking time
Normal speed -
acceleration ramp
profile