
8400 motec | Software Manual
Motor control (MCTRL)
Parameterisable additional functions
102
L
Firmware
≤
02.00 - DMS 2.1 EN - 03/2011
5.9.3
DC-injection braking
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
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:
Method
DC-injection braking can be carried out in two ways with different types of activation:
Manual DC-injection braking (DCB)
Automatic DC-injection braking (Auto-DCB)
Danger!
Holding braking is not possible when this braking mode is used!
• For low-wear control of a holding brake, use the basic function "
Parameter
Info
Lenze setting
Value Unit
Auto-DCB: Threshold
• Operating threshold for activating DC-injection
braking
3 rpm
DCB: Current
• Braking current in [%] based on I
max
(
)
50 %
Auto-DCB: Hold time
0.5 s
DCB: Hold time
999.0 s
LA_NCtrl: bSetDCBrake
• Selection of the signal source for activating DC-
injection braking
Dependent on the selected
control mode
Содержание 8400 motec Series
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