Operation Principle And Hardware Description; Contents Of This Chapter; Operation Principle - ABB ACS880-7107LC Hardware Manual

Operation principle and hardware description 11

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Operation principle and hardware
description

Contents of this chapter

This chapter introduces the operation principle and construction of the DC feeder
unit.

Operation principle

The DC feeder unit provides a connection point for an external energy storage to the
common DC bus of a drive system. It enables transferring energy from a common DC
bus of a drive into an external energy storage and discharging energy back to the DC
bus. The energy storage can be, for example, a battery or super capacitor. The energy
storage media does not belong to the DC feeder unit product offering.
One DC feeder unit can contain one single or up to 3 parallel connected strings.
Parallel strings must be connected to separate energy storages. Each parallel string
must also have its own connection cabling.
Typically, the DC feeder unit is used in marine applications for heave compensation,
peak load compensation, propulsion supply in harbors, or energy storing instead of
an additional generator. The DC feeder unit can also be used in several other
applications where energy storing and reuse is needed.