Dc-Injection Braking - Lenze L-force HighLine C 8400 Series Reference Manual

5.10.5

DC-injection braking


Danger!
The DC-injection braking or auto DC-injection braking function cannot be used
with sensorless control for synchronous motors (SLPSM) and servo control (SC)
mode.
Holding braking is not possible when this braking mode is used!
• Use the basic
brake with a low rate of wear.
DC-injection braking allows the drive to be quickly braked to a standstill without the need
to use an external brake resistor.
 The braking current is set in C00036.
 The maximum braking torque to be generated by the DC braking current is approx.
20 ... 30 % of the rated motor torque. It is lower than that for braking in generator mode
with an external brake resistor.
 Automatic DC-injection braking (auto DCB) improves the starting performance of the
motor when operated without speed feedback.

Tip!
DC-injection braking has the advantage that it is possible to influence the braking
time by changing the motor current or the braking torque..
Short overview of the relevant parameters:
Parameter
C00019
C00036
C00106
C00107
C00701/4
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011
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"Holding brake control" function for controlling the holding
( 541)
Info
Auto-DCB: Threshold
• Operating threshold for activating DC-injection
braking
DC braking: Current
• Braking current in [%] based on rated device
current (C00098)
Auto-DCB: Hold time
DC braking: Hold time
LA_NCtrl: bSetDCBrake
• Selection of the signal source for activating DC-
injection braking
L
8400 HighLine C | Reference manual
Motor control (MCTRL)
Parameterisable additional functions
Dependent on the selected
Lenze setting
Value Unit
3 rpm
50 %
0.500 s
999.000 s
control mode
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