Lenze 8400 BaseLine C User Manual

5 Motor control (MCTRL)
5.6 Parameterisable additional functions
96
Lenze · 8400 BaseLine C · Reference manual · DMS 1.6 EN · 01/2014 · TD05
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5.6.3 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 C036
.
• 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)
( 97)
Automatic DC-injection braking (Auto-DCB) ( 97)
 Danger!
Holding braking is not possible when this braking mode is used!
Parameter Info Lenze setting
Value Unit
C019 Auto-DCB: Threshold
• Operating threshold for activating DC-injection
braking
3rpm
C036
DCB: Current
• Braking current in [%] based on I
max
(C022)
50 %
C106
Auto-DCB: Hold time 0.5 s
C107
DCB: Hold time 999.0 s
C701/4 LA_NCtrl: bSetDCBrake
• Selection of the signal source for activating DC-in-
jection braking
Dependent on the selected
control mode

Lenze 8400 BaseLine C Specifications

General

Brand	Lenze
Model	8400 BaseLine C
Category	Inverter
Language	English