Lenze E82xVxxxKxxxxx - Manual (Page 292)

Function library
Acceleration, deceleration, braking, stopping
DC braking (DCB)
10
l
292 EDS82EV903 EN 3.0
10.6.4 DC braking (DCB)
Description
The DC−injection brake enables quick deceleration of the drive to standstill without using
an external brake resistor. The DC−injection brake can be activated via terminal or
automatically.
ƒ The braking torque amounts to approx. 20 ... 30 % of the rated motor torque. It is
lower than for braking in generator mode with external brake resistor.
ƒ A brake voltage or a brake current can be selected.
ƒ Automatic DC braking improves the starting performance of the motor e.g. when
operating hoists.
Codes for parameter setting
Code Possible settings IMPORTANT
No. Name Lenze Selection
C0019 Operating
threshold −
automatic DC
injection brake
(auto DCB)
0.10 0.00
= inactive {0.02
Hz}
650.00 Hold time ð C0106
Deactivate automatic DC injection
brake (auto DBC):
l at active lower frequency
limitation (C0239)
l at operating mode C0014 = 5
In the case of a max. output
frequency > 50 Hz (C0011), the
switching threshold of the auto
DCB in C0019 must be increased.
^ 292
C0035
*
v
Operation
mode − DC
injection brake
(DCB) 0 0 Brake voltage selection under C0036 Hold time ð C0107 ^ 292
1 Brake current selection under C0036
C0036 Voltage/
current DC
injection brake
(DCB)
а 0.00 {0.01 %} 150.00 % а Device−dependent
l Based on V
rated
, I
rated
l Setting applies to all permitted
mains voltages
^ 292
C0106 Hold time −
automatic DC
injection brake
(auto DCB)
0.50 0.00
= auto DCB
inactive {0.01 s} 999.00
= ¥
Hold time if DC injection braking
is triggered because the value falls
below C0019 ^ 292
C0107 Hold time − DC
injection brake
(DCB)
999.0
0
1.00 {0.01 s} 999.00
= ¥
Hold time if DC injection braking
is externally triggered via terminal
or control word ^ 292
C0196
*
v
Activation auto
DCB 0 0 Auto DCB active if PCTRL1−SET3 <
C0019
^ 292
1 Auto DCB active if PCTRL1−SET3 <
C0019 and NSET1−RFG1−IN < C0019