Checking The Charging Capacity; Single Ac Input - ABB ACS850 Application 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 the AC. Due to this, the charging capacity of the selected supply unit has
to be checked.
The drive modules in frame sizes A-D have a charging circuit in series with the
capacitor bank.
In common DC connection, the charging circuits act in parallel.
•
The sum of the charging currents is fed from the supply.
•
In frame sizes E0, E and G, the charging circuit is in parallel with the input bridge and
the charging circuit(s) of the drive(s) are connected to the supply charge of all the
capacitor banks.
The charging circuit data for each drive module is shown in the following table.
ACS850 Type
03A0-5, 03A6-5, 04A8-5, 06A0-5
08A0-5
010A-5
014A-5, 018A-5
025A-5, 030A-5, 035A-5
044A-5, 050A-5
061A-5, 078A-5, 094A-5
103A-5, 144A-5
166A-5, 202A-5, 225A-5, 260A-5
290A-5
430A-5, 521A-5, 602A-5, 693A-5
720A-5
R : charging resistance of the drive module.
: the minimum value of the total effective charging resistance allowed for the drive
R
min
module

Single AC input

Define the total effective charging resistance R
the DC link.
=
R
•
1 1
tot
+
R R
1
1
1
+ +
L
R
2
n
R R
min
ohm ohm
50 21.7
50 16.5
130 14.7
130 10.4
66 8.5
66 4.6
33 4.6
33 N/A
27 N/A
3.3 N/A
from the drive modules connected to
tot
Common DC configurations
21