Phase Module - ABB ACS2000 AFE 1MVA User Manual

CHAPTER 2 – POWER ELECTRONICS AND CABINET FEATURES
2.3.3 AFE - Active front end
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References
The active front end of the drive consists of an rec-
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tifier for four quadrant operation. The AFE features
2-5 AFE - Active front end
the same electrical design as the INU of the drive.
The AFE rectifies the AC line voltage of the main
power supply and connects its output to the
minus, neutral point and plus side of the DC link.
The AFE maintains the DC-link voltage at the
required level and provides the desired input
power factor at the point of common coupling
(PCC). The input power factor is adjusted by the
AFE to near unity.
Utility Customer
PCC
Transformer
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2-5
Energy flow in driving mode
Energy flow in braking mode
AFE
IFU
4
1
2
3
INU
DC link EMC filter

Phase module 1

1
Phase module 2
2
Phase module 3
3
Extracted phase module
4
36
M