Lenze 8400 motec User Manual

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 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:
Method
DC-injection braking can be carried out in two ways with different types of activation:
Manual DC-injection braking (DCB)
( 103)
Automatic DC-injection braking (Auto-DCB) ( 103)
 Danger!
Holding braking is not possible when this braking mode is used!
• For low-wear control of a holding brake, use the basic function "Holding brake
control". ( 177)
Parameter Info Lenze setting
Value Unit
C00019 Auto-DCB: Threshold
• Operating threshold for activating DC-injection
braking
3rpm
C00036
DCB: Current
• Braking current in [%] based on I
max
(C00022)
50 %
C00106 Auto-DCB: Hold time 0.5 s
C00107
DCB: Hold time 999.0 s
C00701/4
LA_NCtrl: bSetDCBrake
• Selection of the signal source for activating DC-
injection braking
Dependent on the selected
control mode

Lenze 8400 motec Specifications

General

Input Voltage	3-phase 380V to 480V AC
Control Mode	Vector control
Communication	CANopen, PROFIBUS, Ethernet
Protection Features	Overcurrent, overvoltage, undervoltage, short-circuit, overtemperature
Relative Humidity	≤ 95 %, no condensation
Altitude	Up to 1000m above sea level
Storage Temperature	-20°C to 65°C