￭ Simplified main circuit diagram
The following figure shows the simplified main circuit diagram of the rectifier.
AC voltage1.
AC fuses2.
LCL filter3.
IGBT supply module4.
DC fuses5.
DC voltage6.
￭ Charging
A charging circuit powers up the DC link capacitors of the drive system smoothly. Discharged
capacitors cannot be directly connected to the full supply voltage. The charging current
must be limited until the capacitors are charged and ready for normal use.
The control program has a function for controlling the charging circuit. For further information,
see the firmware manual.
ACS880-204LC contains two charging circuits: AC-DC charging circuit charges the cabinet
line-up, and DC-DC charging circuit charges the DC capacitors of one cubicle.
18 Operation principle and hardware description
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