Checking The Charging Capacity; Single Ac Input - ABB ACSM1 System Manual

Checking the charging capacity

When the power is switched on in the common DC system, the DC link
capacitors in each drive module are charged. The charging current is fed
through the unit(s) connected to AC. Due to this the charging capacity of the
selected supply unit has to be checked.
ACSM1 drive modules in frame sizes A-D have a charging circuit in series
with the capacitor bank.
•
In common DC connection, the charging circuits will act in parallel.
•
The sum of the charging currents will be fed from the supply.
The charging circuit data for each drive module is shown in the following
table.
ACSM1-04xx-
Size
02A5-4
03A0-4
04A0-4
05A0-4
07A0-4
09A5-4
012A-4
016A-4
024A-4
031A-4
040A-4
046A-4
060A-4
073A-4
090A-4
R : Charging resistance of the drive module
R : Minimum value of the total effective charging resistance allowed for
min
the drive module.

Single AC input

Define the total effective charging resistance R
connected to DC link.
=
R
•
tot 1
R
R values (R , R
1 2
The following condition must be fulfilled.
•
R > R
tot min
If the condition can not be fulfilled, more than one drive module must be
connected to the AC supply.
R
Frame ohm
A 50
A 50
A 50
A 50
A 50
B 130
B 130
B 130
C 66
C 66
C 66
C 66
D 33
D 33
D 33
1
1 1
+ + +
R R
1 2 n
,...) are the charging resistances of each drive module.
Rmin
ohm
21.7
21.7
21.7
21.7
16.5
14.7
10.4
10.4
8.5
8.5
4.6
4.6
4.6
4.6
4.6
from the drive modules
tot
15