Compound Braking - Siemens MICROMASTER 440 Operating Instructions Manual
0.12kw-250kw
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Also See for MICROMASTER 440:
- Parameter manual (329 pages) ,
- Operating instructions manual (238 pages) ,
- Quick start manual (68 pages)
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Issue 10/06
3.15.2
Compound braking
Parameter range:
Warnings
Faults
Function chart number:
For compound braking (this is enabled using P1236) DC braking is superimposed
with regenerative braking (where the drive regenerates into the line supply as it
brakes along a ramp). If the DC link voltage exceeds the compound switch-in
threshold V
of P1236. In this case, braking is possible with a controlled (closed-loop) motor
frequency and minimum regenerative feedback. Effective braking is obtained
without having to use additional components by optimizing the ramp-down time
(P1121 for OFF1 or when braking from f
compound braking P1236.
Compound braking is suitable for:
Horizontal motion (e.g. traversing drives, conveyor belts)
Vertical motion (e.g. hoisting gear)
⏐f⏐
Fig. 3-75
The compound braking switch-in threshold V
parameter P1254 (Auto detect V
supply voltage P0210 or indirectly using the DC link voltage and r1242 (refer to the
formula in Fig. 3-75).
MICROMASTER 440
Operating Instructions
6SE6400-5AW00-0BP0
P1236
-
-
-
(refer to Fig. 3-75), then a DC current is impressed as a function
DC-Comp
P1236 = 0
Without Compound braking
f_set
f_act
i
u
DC-link
Compound braking
to f
, P1135 for OFF3) and using
1
2
With Compound braking
⏐f⏐
f_set
t
i
t
u
DC-link
U
DC-Comp
t
P1254
=
: 0
U
DC
-
Comp
≠
P1254
: 0
U
DC
-
Comp
is calculated as a function of
DC-Comp
switch-on levels) either directly using the line
DC
3 Functions
P1236 >0
f_act
t
t
t
=
. 1
13
⋅
2
⋅
P0210
=
⋅
0.98
r
1242
205
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