ABB ACSM1 - ACSM1 DC Link Capacitance; Energy Capacity in Common DC

22
ACSM1 DC link capacitance
Each ACSM1 drive module has an own capacitor bank. The capacitance
value of each drive size is given in the table below.
ACSM1-04xx- Cdc
Size Frame uF
02A5-4 A 120
03A0-4 A 120
04A0-4 A 240
05A0-4 A 240
07A0-4 A 240
09A5-4 B 370
012A-4 B 740
016A-4 B 740
024A-4 C 670
031A-4 C 670
040A-4 C 1000
046A-4 C 1000
060A-4 D 1340
073A-4 D 2000
090A-4 D 2000
Energy capacity in common DC
The energy capacity W
dc
in the common DC system can be determined with
following way.
(
)
(
)
22
321
2
dclim,dc
dcndcdcdc
DC
UU
C...CCC
W −×
+
+
+
+
=
where
• C
dc1
…C
dcn
are the actual capacitance values of the drive modules
connected to common DC link.
• U
dc,lim
is the DC link voltage level, which is allowed for the system
• U
dc
is the actual DC link voltage level in normal situation
This actual DC link voltage to be used in energy calculations should be
calculated as:
•
acdc
UU ×= 2